{"id":5165,"date":"2019-03-26T09:07:26","date_gmt":"2019-03-26T01:07:26","guid":{"rendered":"https:\/\/believeindustry.company\/?p=5165"},"modified":"2019-03-26T09:07:26","modified_gmt":"2019-03-26T01:07:26","slug":"tolerancia-da-maquina-de-perfilagem","status":"publish","type":"post","link":"https:\/\/believeindustry.company\/pt\/roll-forming-machine-tolerance\/","title":{"rendered":"Toler\u00e2ncia da m\u00e1quina de perfilagem"},"content":{"rendered":"

Em compara\u00e7\u00e3o com m\u00e1quinas de dobra e corte, a toler\u00e2ncia da m\u00e1quina de perfilagem \u00e9 um pouco maior. No entanto, considerando a velocidade da m\u00e1quina, os usu\u00e1rios finais tamb\u00e9m preferem a m\u00e1quina de perfilagem.<\/p>\n

<\/p>\n

Toler\u00e2ncia da se\u00e7\u00e3o transversal<\/strong><\/h2>\n

O cliente, o projetista do produto e o projetista do cilindro devem concordar com a interpreta\u00e7\u00e3o das dimens\u00f5es e toler\u00e2ncias especificadas nos desenhos antes do in\u00edcio do projeto do cilindro. <\/span>As toler\u00e2ncias do produto afetar\u00e3o o projeto do cilindro, o n\u00famero de suportes e, consequentemente, os custos das ferramentas. <\/span>\u00a0De forma geral, quanto mais rigorosas forem as toler\u00e2ncias do produto, maior ser\u00e1 o n\u00famero de est\u00e1gios de conforma\u00e7\u00e3o de rolos. <\/span>A infinita variedade de se\u00e7\u00f5es transversais e combina\u00e7\u00f5es de toler\u00e2ncias torna imposs\u00edvel atribuir um valor num\u00e9rico exato ao aumento do n\u00famero de passagens necess\u00e1rias, mas os projetistas de cilindros experientes t\u00eam uma no\u00e7\u00e3o de quantas passagens extras s\u00e3o necess\u00e1rias para atingir as toler\u00e2ncias exigidas.<\/span><\/p>\n

Desvio das toler\u00e2ncias de retilineidade e planicidade<\/strong><\/h2>\n

A natureza da conforma\u00e7\u00e3o por rolos causa curvatura, arqueamento, tor\u00e7\u00e3o, ondula\u00e7\u00e3o em cruz, efeito espinha de peixe, ondula\u00e7\u00e3o nas bordas ou no centro, al\u00e9m de imperfei\u00e7\u00f5es no material, no equipamento e na configura\u00e7\u00e3o. <\/span>As ferramentas t\u00eam \u00f3timas\u00a0<\/span>influ\u00eancia nas tens\u00f5es residuais, que criam desvios de retilineidade e planicidade. <\/span>Um bom projeto de m\u00e1quina de perfilagem elimina ou minimiza esses problemas, enquanto\u00a0<\/span>Um projeto ruim cria ou agrava esses problemas.<\/span><\/p>\n

Toler\u00e2ncia na localiza\u00e7\u00e3o de furos e entalhes em m\u00e1quinas de perfilagem\u00a0<\/strong><\/h2>\n

O projetista da m\u00e1quina de perfilagem deve definir a sequ\u00eancia de opera\u00e7\u00f5es se a se\u00e7\u00e3o transversal especificar furos, entalhes, relevos ou outras altera\u00e7\u00f5es na superf\u00edcie da tira. <\/span>Durante o processo de conforma\u00e7\u00e3o por rolos, certas partes do produto ficam sob tens\u00e3o, enquanto outras s\u00e3o comprimidas. O projeto da m\u00e1quina de conforma\u00e7\u00e3o por rolos deve influenciar essa tens\u00e3o.<\/span>a diferen\u00e7a entre o comprimento total da pe\u00e7a antes e depois da conforma\u00e7\u00e3o por rolos.\u00a0<\/span>Em alguns casos, o designer pode proceder com a pr\u00e9-fura\u00e7\u00e3o do produto, utilizando as dimens\u00f5es finais ou estimadas. <\/span>Com base nas medi\u00e7\u00f5es da localiza\u00e7\u00e3o dos furos antes e depois da conforma\u00e7\u00e3o por rolos, \u00e9 poss\u00edvel fazer ajustes no padr\u00e3o de pr\u00e9-fura\u00e7\u00e3o. \u00c0s vezes, para definir as dimens\u00f5es finais da pr\u00e9-fura\u00e7\u00e3o, o projetista precisa repetir algumas etapas.<\/span>\u00a0<\/span>No entanto, \u00e9 importante realizar o teste com a mesma press\u00e3o de lamina\u00e7\u00e3o. <\/span>Press\u00e3o excessiva pode afinar o material e alongar o produto, gerando resultados falsos nos testes de localiza\u00e7\u00e3o dos furos.<\/span><\/p>\n

Comparando com o comprimento da tira antes da conforma\u00e7\u00e3o, o aumento da profundidade da se\u00e7\u00e3o, o menor n\u00famero de passes, os maiores raios de curvatura, a maior rela\u00e7\u00e3o de espessura e o maior aumento no di\u00e2metro do rolo entre os passes resultar\u00e3o em um comprimento maior do produto. <\/span>Se a propor\u00e7\u00e3o entre a \u00e1rea total dos elementos dobrados e a \u00e1rea total dos elementos retos for alta, e a se\u00e7\u00e3o for formada com um n\u00famero adequado de passes, ent\u00e3o o comprimento do produto acabado ser\u00e1 igual ao comprimento da tira inicial.<\/span><\/p>\n

Toler\u00e2ncia de comprimento em m\u00e1quinas de perfilagem de rolos<\/strong><\/h2>\n

O m\u00e9todo de medi\u00e7\u00e3o do comprimento, o sistema de acelera\u00e7\u00e3o da matriz e a prensa s\u00e3o os fatores que mais influenciam a toler\u00e2ncia de comprimento. <\/span>Al\u00e9m disso, outros fatores, como o projeto do rolo, tamb\u00e9m podem influenciar a toler\u00e2ncia de comprimento. <\/span>A diferen\u00e7a de velocidade superficial nas superf\u00edcies de acionamento pode causar uma velocidade de conforma\u00e7\u00e3o de rolos irregular. <\/span>Uma grande diferen\u00e7a entre as velocidades de superf\u00edcie dos rolos superior e inferior acionados pode aumentar a toler\u00e2ncia de comprimento em 8 a 10 vezes.<\/span><\/p>\n

Ver mais>><\/strong><\/span> Projeto de M\u00e1quina de Conforma\u00e7\u00e3o de Perfis<\/a><\/p>\n

Acredite na Empresa do Setor<\/a>\u00a0Contamos com uma equipe experiente para projetar as m\u00e1quinas. E os projetos acompanham a tecnologia mais recente do mundo.<\/p>","protected":false},"excerpt":{"rendered":"

Em compara\u00e7\u00e3o com m\u00e1quinas de dobra e corte, a toler\u00e2ncia da m\u00e1quina de perfilagem \u00e9 um pouco maior. No entanto, considerando a velocidade da m\u00e1quina, os usu\u00e1rios finais tamb\u00e9m preferem a m\u00e1quina de perfilagem.<\/p>","protected":false},"author":2,"featured_media":5167,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_angie_page":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"page_builder":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false},"categories":[607849853],"tags":[607849899],"class_list":["post-5165","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rollforming-machine-design","tag-roll-forming-machine-tolerance"],"blocksy_meta":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/believeindustry.company\/wp-content\/uploads\/2019\/03\/roll-forming-machine-tolerance.png","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p9K5n8-1lj","jetpack_likes_enabled":false,"jetpack-related-posts":[{"id":2837,"url":"https:\/\/believeindustry.company\/pt\/roll-forming-machine-roller-design\/","url_meta":{"origin":5165,"position":0},"title":"Projeto de rolos: desenho de perfil de perfis de a\u00e7o","author":"Believe Industry Group","date":"Agosto 15, 2018","format":false,"excerpt":"Roll Forming Machine Design Complexity of profile drawings The profile drawings of the roll formed profiles is the most signficant factor in roll forming machine roller design. 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Mechanical Properties During roll forming process, the strain (elongation) of the outside fiber of the\u2026","rel":"","context":"In "RollForming Machine Design"","block_context":{"text":"RollForming Machine Design","link":"https:\/\/believeindustry.company\/pt\/category\/rollforming-machine-design\/"},"img":{"alt_text":"material influence roll forming machine design","src":"https:\/\/i0.wp.com\/believeindustry.company\/wp-content\/uploads\/2019\/04\/material-influence-roll-forming-machine-design.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/believeindustry.company\/wp-content\/uploads\/2019\/04\/material-influence-roll-forming-machine-design.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/believeindustry.company\/wp-content\/uploads\/2019\/04\/material-influence-roll-forming-machine-design.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":1434,"url":"https:\/\/believeindustry.company\/pt\/roll-former\/","url_meta":{"origin":5165,"position":2},"title":"INFLU\u00caNCIA DO MATERIAL NO PROJETO DA CONFORMADORA DE ROLOS","author":"Believe Industry Group","date":"Abril 21, 2018","format":false,"excerpt":"The Mechanical properties, surface, thickness deviation, width, straightness and flatness tolerance of the material will affect to roll former design MATERIAL INFLUENCE WHILE DESIGN THE ROLL FORMER Mechanical Properties The mechanical properties of the material can be obtained from the material supplier. 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