{"id":3647,"date":"2023-11-14T04:39:41","date_gmt":"2023-11-14T04:39:41","guid":{"rendered":"https:\/\/www.coomcool.com\/?p=3647"},"modified":"2024-09-14T07:34:29","modified_gmt":"2024-09-14T07:34:29","slug":"analysis-of-common-causes-of-chain-failure","status":"publish","type":"post","link":"https:\/\/www.coomcool.com\/it\/analysis-of-common-causes-of-chain-failure\/","title":{"rendered":"Analisi delle cause pi\u00f9 comuni di guasto della catena"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"3647\" class=\"elementor elementor-3647\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"wd-negative-gap elementor-element elementor-element-c751267 e-flex e-con-boxed e-con e-parent\" data-id=\"c751267\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2c841db elementor-widget elementor-widget-wd_text_block\" data-id=\"2c841db\" data-element_type=\"widget\" data-widget_type=\"wd_text_block.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-text-block reset-last-child text-left\">\n\t\t\t\n\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><blockquote><div class=\"ace-line ace-line old-record-id-FggpdlBB9oOc6rxnOFfcyOH1n2J\">Le catene sono ampiamente utilizzate in varie applicazioni di guida e trasporto. Tuttavia, il funzionamento continuo a lungo termine pu\u00f2 causare diversi problemi. Di seguito sono riportate le cause pi\u00f9 comuni di rottura delle catene.<\/div><\/blockquote><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-ca99ea0 e-flex e-con-boxed e-con e-parent\" data-id=\"ca99ea0\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-41d4d14 elementor-widget__width-initial elementor-widget elementor-widget-wd_table\" data-id=\"41d4d14\" data-element_type=\"widget\" data-widget_type=\"wd_table.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wd-el-table-wrap wd-reset-all-last\">\n\t\t\t<table class=\"wd-el-table\">\n\t\t\t\t\t\t\t\t\t<thead class=\"text-center\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-d480911\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<th class=\"wd-table-cell elementor-repeater-item-37c0c74\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-P9NCdOwGeododXxmDiwcgbnmnch\">Cause di fallimento<\/div><\/div>\t\t\t\t\t\t\t\t<\/th>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<th class=\"wd-table-cell elementor-repeater-item-0ee2ebd\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-Kak9d5IE6o972pxVJ2KcyfXJnzD\">Illustrazione<\/div><\/div>\t\t\t\t\t\t\t\t<\/th>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t<\/thead>\n\t\t\t\t\n\t\t\t\t<tbody class=\"text-left\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-6cfcc38\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-316bbc7\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-HYZUdsnkMohSjnxYHDNcGijwn6g\" style=\"text-align: center\">Frattura del perno - Fatica da corrosione<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-51a3aa1\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-3634 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/1.Pin-Fracture-Corrosion-Fatigue.jpg\" alt=\"\" width=\"1815\" height=\"481\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/1.Pin-Fracture-Corrosion-Fatigue.jpg 1815w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/1.Pin-Fracture-Corrosion-Fatigue-300x80.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/1.Pin-Fracture-Corrosion-Fatigue-1024x271.jpg 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/1.Pin-Fracture-Corrosion-Fatigue-768x204.jpg 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/1.Pin-Fracture-Corrosion-Fatigue-1536x407.jpg 1536w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/1.Pin-Fracture-Corrosion-Fatigue-18x5.jpg 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/1.Pin-Fracture-Corrosion-Fatigue-1200x318.jpg 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/1.Pin-Fracture-Corrosion-Fatigue-150x40.jpg 150w\" sizes=\"(max-width: 1815px) 100vw, 1815px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-e69a603\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-53aa766\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-Mo3qdXzzcoX7B0xgyEJck16Entc\" data-list=\"bullet\"><div>Quando il carico viene applicato alla catena, si accumula tra il \"lato posteriore\" del perno e le pareti interne della maglia o della boccola.<\/div><\/li><li class=\"ace-line ace-line old-record-id-LVA5dK5LUoVydyxGjZKc1Arkncf\" data-list=\"bullet\"><div>Se il perno della catena opera in condizioni di acqua, composti acido-base o situazioni in cui l'acqua genera acido, e non \u00e8 protetto, le aree esposte del perno sono soggette a corrosione e vaiolatura.<\/div><\/li><li class=\"ace-line ace-line old-record-id-AVPRds0skoOZSxxKE77cIXCZnDe\" data-list=\"bullet\"><div>Come ogni componente strutturale, il perno della catena si piega leggermente sotto carico. In questo caso, la superficie posteriore del perno \u00e8 tesa o in tensione e, se il perno \u00e8 gi\u00e0 stato corroso, ogni buca diventa un punto di concentrazione delle sollecitazioni.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-60e785d\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-ba2809e\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-GEfzd0JePoRa3rxEYWUcCJfKngg\" style=\"text-align: center\">Usura del perno - abrasione, lubrificazione insufficiente o guasto<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-055dcab\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img decoding=\"async\" class=\"size-full wp-image-3635 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/2.Pin-Wear-Abrasion-Insufficient-Lubrication-or-Failure.jpg\" alt=\"\" width=\"1808\" height=\"431\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/2.Pin-Wear-Abrasion-Insufficient-Lubrication-or-Failure.jpg 1808w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/2.Pin-Wear-Abrasion-Insufficient-Lubrication-or-Failure-300x72.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/2.Pin-Wear-Abrasion-Insufficient-Lubrication-or-Failure-1024x244.jpg 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/2.Pin-Wear-Abrasion-Insufficient-Lubrication-or-Failure-768x183.jpg 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/2.Pin-Wear-Abrasion-Insufficient-Lubrication-or-Failure-1536x366.jpg 1536w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/2.Pin-Wear-Abrasion-Insufficient-Lubrication-or-Failure-18x4.jpg 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/2.Pin-Wear-Abrasion-Insufficient-Lubrication-or-Failure-1200x286.jpg 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/2.Pin-Wear-Abrasion-Insufficient-Lubrication-or-Failure-150x36.jpg 150w\" sizes=\"(max-width: 1808px) 100vw, 1808px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-8cb6055\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-2e3e389\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-FBVRdlEr3oXhSwx9VS2chNwqnX7\" data-list=\"bullet\"><div>La presenza di materiali abrasivi o di un film d'olio inefficace tra le superfici dei cuscinetti accelera l'usura. Il perno qui raffigurato lavora in una catena di trasmissione di potenza esposta a sabbia e sporcizia.<\/div><\/li><li class=\"ace-line ace-line old-record-id-AfoudbZZgoVPmOxNj8Gc4JrBnSe\" data-list=\"bullet\"><div>Questi materiali abrasivi penetrano nelle maglie, causando una rapida usura del perno e riducendo significativamente la durata della catena.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-0fb8dec\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-1611f8e\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-BrXIdWyegopEckxm40ecFlElnTb\" style=\"text-align: center\">Scalfittura del perno - Film d'olio insufficiente tra le superfici del cuscinetto<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-02bcc92\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img decoding=\"async\" class=\"size-full wp-image-3636 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/3.Pin-Scuffing-Insufficient-Oil-Film-Between-Bearing-Surfaces.jpg\" alt=\"\" width=\"1268\" height=\"1001\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/3.Pin-Scuffing-Insufficient-Oil-Film-Between-Bearing-Surfaces.jpg 1268w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/3.Pin-Scuffing-Insufficient-Oil-Film-Between-Bearing-Surfaces-300x237.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/3.Pin-Scuffing-Insufficient-Oil-Film-Between-Bearing-Surfaces-1024x808.jpg 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/3.Pin-Scuffing-Insufficient-Oil-Film-Between-Bearing-Surfaces-768x606.jpg 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/3.Pin-Scuffing-Insufficient-Oil-Film-Between-Bearing-Surfaces-15x12.jpg 15w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/3.Pin-Scuffing-Insufficient-Oil-Film-Between-Bearing-Surfaces-1200x947.jpg 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/3.Pin-Scuffing-Insufficient-Oil-Film-Between-Bearing-Surfaces-150x118.jpg 150w\" sizes=\"(max-width: 1268px) 100vw, 1268px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-1fc85c3\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-5c4ce9b\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-SlxmdHsFDoZT0Fxj8iTcXfd8nhe\" data-list=\"bullet\"><div>Se il film d'olio non \u00e8 sufficiente a sostenere il carico o la lubrificazione cessa per qualsiasi motivo, il perno della catena si irruvidisce.<\/div><\/li><li class=\"ace-line ace-line old-record-id-Fntcd3j5XoNj2axeEDGc4vhSnyb\" data-list=\"bullet\"><div>Naturalmente, l'intensit\u00e0 dell'usura dipende dal grado e dalla durata del contatto metallo-metallo. Anche un breve periodo di funzionamento in condizioni di carico insolitamente severe o a velocit\u00e0 molto elevate pu\u00f2 causare un'usura precoce o moderata. Questo tipo di usura non influisce in modo significativo sulla durata della catena e, se si adottano per tempo misure preventive, la situazione non pu\u00f2 peggiorare.<\/div><\/li><li class=\"ace-line ace-line old-record-id-Ga0bdUReZomsfLx47x7cyzwOnWg\" data-list=\"bullet\"><div>Un'usura pi\u00f9 intensa si osserva quando le catene per impieghi gravosi funzionano a velocit\u00e0 molto elevate o molto basse. A velocit\u00e0 elevate, l'usura dei perni pu\u00f2 verificarsi perch\u00e9 l'intervallo di tempo tra i cicli di carico \u00e8 insufficiente a formare un film d'olio adeguato. A velocit\u00e0 molto basse, l'elevata pressione del cuscinetto pu\u00f2 comprimere il lubrificante e i carichi pesanti continui possono impedire al lubrificante di riformarsi tra le superfici del cuscinetto.<\/div><\/li><li class=\"ace-line ace-line old-record-id-DtI1dKT4eojgRIxX998c2WjfnVh\" data-list=\"bullet\"><div>Alcune variazioni di carico e di velocit\u00e0 consentono al lubrificante di funzionare efficacemente, riducendo la tendenza all'usura dei perni.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-b4645d3\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-409606c\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-H9lBdDQcdoM0PlxqVN2c05eOnKP\" style=\"text-align: center\">Cesoiamento del perno - Sovraccarico improvviso e grave<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-d98ca66\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3637 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/4.Pin-Shearing-Sudden-Severe-Overload.png\" alt=\"\" width=\"1090\" height=\"357\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/4.Pin-Shearing-Sudden-Severe-Overload.png 1090w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/4.Pin-Shearing-Sudden-Severe-Overload-300x98.png 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/4.Pin-Shearing-Sudden-Severe-Overload-1024x335.png 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/4.Pin-Shearing-Sudden-Severe-Overload-768x252.png 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/4.Pin-Shearing-Sudden-Severe-Overload-18x6.png 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/4.Pin-Shearing-Sudden-Severe-Overload-150x49.png 150w\" sizes=\"(max-width: 1090px) 100vw, 1090px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-efb2d17\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-d7cf221\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-GSfTdcmfYoctKNxLItRcb6XMnic\" data-list=\"bullet\"><div>Se si verifica una separazione dei perni, di solito si pu\u00f2 risalire a un sovraccarico improvviso e anomalo. Un blocco imprevisto \u00e8 una causa comune.<\/div><\/li><li class=\"ace-line ace-line old-record-id-V1XidrSrqo5RLjxLhZXc70KInwf\" data-list=\"bullet\"><div>Come mostrato nell'illustrazione, un forte carico d'urto \u00e8 stato applicato a una catena gi\u00e0 pesantemente caricata, causando la tranciatura del perno. Il taglio del perno \u00e8 caratterizzato da una sezione trasversale rotonda e relativamente liscia. Poich\u00e9 la tranciatura del perno pu\u00f2 essere ricondotta a condizioni di carico anomale, di solito \u00e8 possibile identificarne la causa e adottare misure preventive.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-198b96c\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-3236ad4\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-EVM6d5uwIozJNUxUEa3cZA2fnWd\" style=\"text-align: center\">Piegatura del perno - Sovraccarico<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-d0e11f3\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3638 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/5.Pin-Bending-Overload.jpg\" alt=\"\" width=\"1464\" height=\"494\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/5.Pin-Bending-Overload.jpg 1464w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/5.Pin-Bending-Overload-300x101.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/5.Pin-Bending-Overload-1024x346.jpg 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/5.Pin-Bending-Overload-768x259.jpg 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/5.Pin-Bending-Overload-18x6.jpg 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/5.Pin-Bending-Overload-1200x405.jpg 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/5.Pin-Bending-Overload-150x51.jpg 150w\" sizes=\"(max-width: 1464px) 100vw, 1464px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-096534a\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-9adf152\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-LTcZdWZDtoaNkDx6q8bc3sldn3w\" data-list=\"bullet\"><div>La flessione del perno \u00e8 solitamente causata da un carico improvviso applicato con forza sufficiente a provocare una deformazione permanente, ma insufficiente a causare la rottura del perno. Ci\u00f2 si verifica quando la catena di trasmissione funziona oltre la sua capacit\u00e0 di carico progettata.<\/div><\/li><li class=\"ace-line ace-line old-record-id-BlzMdxrTUotz5FxXyJvcTXkVnqg\" data-list=\"bullet\"><div>Questo fenomeno \u00e8 osservabile nelle catene di trasporto per impieghi gravosi, dove un improvviso aumento del carico d'impatto supera la normale capacit\u00e0 di lavoro della catena. In genere si adottano misure correttive per ridurre la gravit\u00e0 o la probabilit\u00e0 del sovraccarico.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-6d0a098\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-1620272\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-YlbGdJAGWo01QSxdznMc2BoBnab\" style=\"text-align: center\">Erosione di perni e boccole - Acqua, materiali abrasivi e corrosivi<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-98f18b5\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3639 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/6.Pin-and-Bushing-Erosion-Water-Abrasive-and-Corrosive-Materials.jpg\" alt=\"\" width=\"1379\" height=\"937\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/6.Pin-and-Bushing-Erosion-Water-Abrasive-and-Corrosive-Materials.jpg 1379w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/6.Pin-and-Bushing-Erosion-Water-Abrasive-and-Corrosive-Materials-300x204.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/6.Pin-and-Bushing-Erosion-Water-Abrasive-and-Corrosive-Materials-1024x696.jpg 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/6.Pin-and-Bushing-Erosion-Water-Abrasive-and-Corrosive-Materials-768x522.jpg 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/6.Pin-and-Bushing-Erosion-Water-Abrasive-and-Corrosive-Materials-18x12.jpg 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/6.Pin-and-Bushing-Erosion-Water-Abrasive-and-Corrosive-Materials-1200x815.jpg 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/6.Pin-and-Bushing-Erosion-Water-Abrasive-and-Corrosive-Materials-150x102.jpg 150w\" sizes=\"(max-width: 1379px) 100vw, 1379px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-6438327\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-fe92d20\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-RbLzdQvFWo40qpxdqbKcrANJn2e\" data-list=\"bullet\"><div>Le superfici dei cuscinetti delle maglie di catena possono corrodersi quando la catena opera in presenza di acqua, materiali abrasivi e corrosivi. L'entit\u00e0 e la velocit\u00e0 dell'erosione dipendono dalla gravit\u00e0 delle condizioni.<\/div><\/li><li class=\"ace-line ace-line old-record-id-SmvvdZMLGostxZxJl9dckYHPn3d\" data-list=\"bullet\"><div>L'erosione \u00e8 un processo continuo in cui contaminanti abrasivi e acqua si combinano per lavare via le particelle di acciaio dalla superficie del cuscinetto, riducendo gradualmente la sezione trasversale del perno e della boccola.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-c03aa11\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-cdc271b\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-NlhWdoJnFoRtPoxLQj4cWBkinNb\" style=\"text-align: center\">Sigillatura del giunto - Corrosione, usura o riempimento dei giunti<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-204d63b\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3640 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/7.Joint-Seizing-Corrosion-Wear-or-Filling-of-Joints.jpg\" alt=\"\" width=\"1260\" height=\"814\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/7.Joint-Seizing-Corrosion-Wear-or-Filling-of-Joints.jpg 1260w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/7.Joint-Seizing-Corrosion-Wear-or-Filling-of-Joints-300x194.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/7.Joint-Seizing-Corrosion-Wear-or-Filling-of-Joints-1024x662.jpg 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/7.Joint-Seizing-Corrosion-Wear-or-Filling-of-Joints-768x496.jpg 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/7.Joint-Seizing-Corrosion-Wear-or-Filling-of-Joints-18x12.jpg 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/7.Joint-Seizing-Corrosion-Wear-or-Filling-of-Joints-1200x775.jpg 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/7.Joint-Seizing-Corrosion-Wear-or-Filling-of-Joints-150x97.jpg 150w\" sizes=\"(max-width: 1260px) 100vw, 1260px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-b47ebae\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-252208c\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-Vjiidsg4YoEzWbxddOqcPluVnje\" data-list=\"bullet\"><div>Se le superfici dei cuscinetti sono gravemente corrose o usurate, o gli spazi tra le parti del giunto sono riempiti con materiali soggetti a indurimento, i giunti di collegamento sono suscettibili di grippaggio o incollaggio.<\/div><\/li><li class=\"ace-line ace-line old-record-id-YBM0dPPedoR94LxmAOQcOcmBnLb\" data-list=\"bullet\"><div>Quando la catena si articola sulla ruota dentata, le parti del giunto possono allentarsi. In caso di innesto rigido del giunto, si pu\u00f2 verificare la torsione del perno o la lacerazione del foro del passo della piastra laterale. I giunti della catena possono anche gripparsi o incollarsi a causa dell'usura se la catena funziona oltre i suoi limiti di velocit\u00e0.<\/div><\/li><li class=\"ace-line ace-line old-record-id-M5oOds17AoStHXxEmexcH2vYn1c\" data-list=\"bullet\"><div>\u00c8 possibile utilizzare un rivestimento protettivo per prevenire la ruggine e il potenziale grippaggio quando la catena \u00e8 soggetta a funzionamento intermittente o a lunghi periodi di inattivit\u00e0.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-1339392\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-e287f45\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-OCLPdDSEWogAdyxrHkJce9l0no7\" style=\"text-align: center\">Fatica della piastra laterale nei punti di inclinazione - Carico ciclico<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-401cc1a\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3641 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/8.Side-Plate-Fatigue-at-Pitch-Points-Cyclic-Loading.jpg\" alt=\"\" width=\"729\" height=\"687\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/8.Side-Plate-Fatigue-at-Pitch-Points-Cyclic-Loading.jpg 729w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/8.Side-Plate-Fatigue-at-Pitch-Points-Cyclic-Loading-300x283.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/8.Side-Plate-Fatigue-at-Pitch-Points-Cyclic-Loading-13x12.jpg 13w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/8.Side-Plate-Fatigue-at-Pitch-Points-Cyclic-Loading-150x141.jpg 150w\" sizes=\"(max-width: 729px) 100vw, 729px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-a122046\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-d6fbc79\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-CHwCd7JMmoYjP7xUXOAcLIu8nHb\" data-list=\"bullet\"><div>Il cedimento per fatica della piastra laterale inizia con cricche molto piccole ai bordi dei fori di passo. Ripetuti cicli di carico fanno propagare gradualmente le cricche verso l'esterno, fino a quando la piastra laterale \u00e8 sufficientemente indebolita da consentire la rottura completa.<\/div><\/li><li class=\"ace-line ace-line old-record-id-TBxkd9o4roxmzWx6GUhc8pwfnde\" data-list=\"bullet\"><div>La rottura per fatica \u00e8 caratterizzata da una serie di curve concentriche in un'area con aspetto di frattura fragile. Di solito \u00e8 necessaria un'analisi approfondita di tutte le condizioni operative per trovare una soluzione efficace.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-40d44b2\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-c194b45\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-RJ3RdA0JCo4FAwxGBB6c6Zhtnsb\" style=\"text-align: center\">Fatica dei rulli - Corrosione, usura o riempimento dei giunti<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-4bba6fc\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3642 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/9.Roller-Fatigue-Corrosion-Wear-or-Filling-of-Joints.jpg\" alt=\"\" width=\"749\" height=\"560\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/9.Roller-Fatigue-Corrosion-Wear-or-Filling-of-Joints.jpg 749w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/9.Roller-Fatigue-Corrosion-Wear-or-Filling-of-Joints-300x224.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/9.Roller-Fatigue-Corrosion-Wear-or-Filling-of-Joints-16x12.jpg 16w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/9.Roller-Fatigue-Corrosion-Wear-or-Filling-of-Joints-150x112.jpg 150w\" sizes=\"(max-width: 749px) 100vw, 749px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-b18bec5\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-8098849\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-SXahdMSbhoBLoAxpfLxcsEVCnzL\" data-list=\"bullet\"><div>Un certo impatto si verifica quando la ruota dentata entra in contatto con i denti del pignone. Se le condizioni operative prevedono carichi pesanti e velocit\u00e0 elevate, l'impatto dell'innesto dei denti pu\u00f2 essere forte, generando una forza sufficiente a provocare forti sollecitazioni sulla superficie del rullo. Gli impatti ripetuti possono provocare cricche da fatica. Alla fine, il rullo pu\u00f2 rompersi a causa della fatica del metallo.<\/div><\/li><li class=\"ace-line ace-line old-record-id-D9m3dKjAuoTGX1xxhYsc5pkonmc\" data-list=\"bullet\"><div>La riduzione del carico e della velocit\u00e0 spesso supera l'affaticamento dei rulli.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-fa49d62\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-2f45be8\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-PnfYdJSk0omgMdxpGr9c8ipHnce\" style=\"text-align: center\">Rulli o boccole schiacciati a causa del carico elevato<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-0087028\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3643 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/10.Crushed-Rollers-or-Bushings-Due-to-High-Load.jpg\" alt=\"\" width=\"567\" height=\"508\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/10.Crushed-Rollers-or-Bushings-Due-to-High-Load.jpg 567w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/10.Crushed-Rollers-or-Bushings-Due-to-High-Load-300x269.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/10.Crushed-Rollers-or-Bushings-Due-to-High-Load-13x12.jpg 13w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/10.Crushed-Rollers-or-Bushings-Due-to-High-Load-150x134.jpg 150w\" sizes=\"(max-width: 567px) 100vw, 567px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-4d5b2a9\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-e342f7d\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-LF2Hd5ZTAoXk22xxA9LclWr5nuk\" data-list=\"bullet\"><div>A causa dell'allungamento del passo, le catene gravemente usurate possono non essere pi\u00f9 posizionate correttamente sulle ruote dentate. Alcuni rulli (o boccole) possono entrare in contatto con le punte dei denti della ruota dentata, applicando un carico sufficiente a schiacciare i rulli o le boccole. Quando si osserva questo tipo di aggancio, la catena deve essere sostituita per evitare danni eccessivi alla ruota dentata.<\/div><\/li><li class=\"ace-line ace-line old-record-id-RnWWduo7hocpZaxj4GHcWsQun3f\" data-list=\"bullet\"><div>Anche un forte sovraccarico dovuto a un inceppamento imprevisto pu\u00f2 schiacciare i rulli o le boccole. In questi casi, di solito si adottano misure correttive per evitare che l'incidente si ripeta.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-0e5ca3e\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-2fb80fb\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-PJUvdL0iJorylFxrxtYcpLXYnIg\" style=\"text-align: center\">Usura delle maglie - Scorrimento tra ruota di trazione e catena<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-394199f\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3644 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/11.Link-Wear-Sliding-Between-Traction-Wheel-and-Chain.jpg\" alt=\"\" width=\"1283\" height=\"784\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/11.Link-Wear-Sliding-Between-Traction-Wheel-and-Chain.jpg 1283w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/11.Link-Wear-Sliding-Between-Traction-Wheel-and-Chain-300x183.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/11.Link-Wear-Sliding-Between-Traction-Wheel-and-Chain-1024x626.jpg 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/11.Link-Wear-Sliding-Between-Traction-Wheel-and-Chain-768x469.jpg 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/11.Link-Wear-Sliding-Between-Traction-Wheel-and-Chain-18x12.jpg 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/11.Link-Wear-Sliding-Between-Traction-Wheel-and-Chain-1200x733.jpg 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/11.Link-Wear-Sliding-Between-Traction-Wheel-and-Chain-150x92.jpg 150w\" sizes=\"(max-width: 1283px) 100vw, 1283px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-4237bb4\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-f9c7f55\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-UOerdImOioj1Rxx8dvecfB7AnNd\" data-list=\"bullet\"><div>Per gli ascensori a tazze e altre applicazioni, al posto delle ruote dentate vengono spesso utilizzate ruote di trazione a basso costo. Una trazione adeguata tra la catena e la ruota motrice \u00e8 essenziale per un funzionamento efficiente.<\/div><\/li><li class=\"ace-line ace-line old-record-id-YwoGd6DFEoh5HExQ5pncS0aFndh\" data-list=\"bullet\"><div>Il collegamento mostrato nell'illustrazione \u00e8 utilizzato in un elevatore a tazze che tratta abrasivi duri. La grave usura riscontrata \u00e8 causata dallo scorrimento durante i periodi di carico massimo. In questo caso, la trazione era insufficiente per azionare efficacemente la catena.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-23b68aa\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-324bb64\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-YGhRdSz3eoqcfixpWEKcHu2QnFb\" style=\"text-align: center\">Usura anomala di catena, pignone o cingolo - Disallineamento<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-56a3acc\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3645 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/12.Abnormal-Chain-Sprocket-or-Track-Wear-Misalignment.jpg\" alt=\"\" width=\"1320\" height=\"868\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/12.Abnormal-Chain-Sprocket-or-Track-Wear-Misalignment.jpg 1320w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/12.Abnormal-Chain-Sprocket-or-Track-Wear-Misalignment-300x197.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/12.Abnormal-Chain-Sprocket-or-Track-Wear-Misalignment-1024x673.jpg 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/12.Abnormal-Chain-Sprocket-or-Track-Wear-Misalignment-768x505.jpg 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/12.Abnormal-Chain-Sprocket-or-Track-Wear-Misalignment-18x12.jpg 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/12.Abnormal-Chain-Sprocket-or-Track-Wear-Misalignment-1200x789.jpg 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/12.Abnormal-Chain-Sprocket-or-Track-Wear-Misalignment-150x99.jpg 150w\" sizes=\"(max-width: 1320px) 100vw, 1320px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-d461e4f\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-946f511\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-VAwmd0SMVoNV1OxwbHNcAEz4nIb\" data-list=\"bullet\"><div>Un andamento insolito dell'usura sulle catene indica tipicamente un disallineamento, che pu\u00f2 portare a gravi danni alla catena. I tipi pi\u00f9 comuni di disallineamento sono:<\/div><ul class=\"list-bullet2\"><li class=\"ace-line ace-line old-record-id-RkZBddSNroyvO3xdyCpcnEMunTe\" data-list=\"bullet\"><div>Alberi non paralleli<\/div><\/li><li class=\"ace-line ace-line old-record-id-KH4udPYiqoILaIxT1P8cgK3lnWh\" data-list=\"bullet\"><div>Pignoni non allineati tra loro<\/div><\/li><li class=\"ace-line ace-line old-record-id-JwFFdZV7Io7Tx3xcVo6cEFdAnXb\" data-list=\"bullet\"><div>Sezioni del nastro trasportatore non allineate.<\/div><\/li><\/ul><\/li><li class=\"ace-line ace-line old-record-id-NvDSd4Dq7oR76kxGcXzc7hSDn5g\" data-list=\"bullet\"><div>In caso di disallineamento, un lato della catena viene sovraccaricato e la catena \u00e8 costretta a torcersi o a distorcersi nel passaggio da una ruota dentata all'altra. Un carico non uniforme della catena pu\u00f2 portare all'usura dei perni, al cedimento delle piastre laterali o a una rapida usura.<\/div><\/li><li class=\"ace-line ace-line old-record-id-GnAvdR7W3oj3zyxJ8ZMcSFKCn6f\" data-list=\"bullet\"><div>La migliore misura preventiva contro i danni alla catena dovuti al disallineamento consiste nell'ispezionare regolarmente il sistema di trasmissione e di trasporto.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-1c978bb\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-07f8975\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><div class=\"ace-line ace-line old-record-id-MjZNdTTgIozJ9MxqwLjc2b6mnsh\" style=\"text-align: center\">Allungamento (o stiramento) della catena - Sovraccarico di trazione<\/div><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-d8e968c\" colspan=\"1\" rowspan=\"1\">\n\t\t\t\t\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3646 aligncenter\" src=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/13.Chain-Elongation-or-Stretching-Tensile-Overload.jpg\" alt=\"\" width=\"1280\" height=\"842\" srcset=\"https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/13.Chain-Elongation-or-Stretching-Tensile-Overload.jpg 1280w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/13.Chain-Elongation-or-Stretching-Tensile-Overload-300x197.jpg 300w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/13.Chain-Elongation-or-Stretching-Tensile-Overload-1024x674.jpg 1024w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/13.Chain-Elongation-or-Stretching-Tensile-Overload-768x505.jpg 768w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/13.Chain-Elongation-or-Stretching-Tensile-Overload-18x12.jpg 18w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/13.Chain-Elongation-or-Stretching-Tensile-Overload-1200x789.jpg 1200w, https:\/\/www.coomcool.com\/wp-content\/uploads\/2024\/09\/13.Chain-Elongation-or-Stretching-Tensile-Overload-150x99.jpg 150w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t\t\t\t\t<tr class=\"wd-table-row elementor-repeater-item-e6768ee\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<td class=\"wd-table-cell elementor-repeater-item-2fad064\" colspan=\"2\" rowspan=\"1\">\n\t\t\t\t\t\t\t<div data-page-id=\"RZSQdltk7otQHixzZ8jcMV7unnf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"><ul class=\"list-bullet1\"><li class=\"ace-line ace-line old-record-id-RbKQdi0JvoJhw2x6arecLPKznxh\" data-list=\"bullet\"><div>Questo tipo di allungamento comporta una deformazione plastica, in cui il materiale della piastra laterale viene caricato oltre il suo punto di snervamento ma non la sua resistenza ultima. Di conseguenza, le piastre laterali si allungano in modo permanente, ma non si rompono. Se l'allungamento del passo \u00e8 grave, la catena non potr\u00e0 pi\u00f9 ingranare correttamente con le ruote dentate.<\/div><\/li><li class=\"ace-line ace-line old-record-id-M3DsdeUWHor8RXxJwgRczHnGnbh\" data-list=\"bullet\"><div>Il sovraccarico di trazione che porta all'allungamento della catena pu\u00f2 verificarsi quando l'apparecchiatura \u00e8 costretta a funzionare oltre la sua capacit\u00e0 progettuale, a causa di blocchi imprevisti o per ragioni simili. In genere si adottano misure correttive per evitare ulteriori sovraccarichi. A volte, per evitare di trasmettere il sovraccarico alla catena, si possono utilizzare dispositivi di assorbimento degli urti.<\/div><\/li><\/ul><\/div>\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t\t<\/tbody>\n\t\t\t<\/table>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"wd-negative-gap elementor-element elementor-element-27f41e0 e-flex e-con-boxed e-con e-parent\" data-id=\"27f41e0\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f6f57c2 elementor-widget__width-inherit elementor-widget elementor-widget-spacer\" data-id=\"f6f57c2\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 25-07-2024 *\/\n.elementor-column .elementor-spacer-inner{height:var(--spacer-size)}.e-con{--container-widget-width:100%}.e-con-inner>.elementor-widget-spacer,.e-con>.elementor-widget-spacer{width:var(--container-widget-width,var(--spacer-size));--align-self:var(--container-widget-align-self,initial);--flex-shrink:0}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container,.e-con>.elementor-widget-spacer>.elementor-widget-container{height:100%;width:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer{height:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner{height:var(--container-widget-height,var(--spacer-size))}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty,.e-con>.elementor-widget-spacer.elementor-widget-empty{position:relative;min-height:22px;min-width:22px}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon,.e-con>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon{position:absolute;top:0;bottom:0;left:0;right:0;margin:auto;padding:0;width:22px;height:22px}<\/style>\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>I guasti pi\u00f9 comuni della catena sono l'usura dei perni, la corrosione e il sovraccarico, spesso causati da lubrificazione inadeguata, disallineamento o condizioni estreme.<\/p>","protected":false},"author":1,"featured_media":3650,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3647","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is 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