{"id":6204,"date":"2020-07-06T06:15:24","date_gmt":"2020-07-06T06:15:24","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6204"},"modified":"2022-06-30T09:00:04","modified_gmt":"2022-06-30T09:00:04","slug":"o-que-e-rugosidade-da-superficie","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/o-que-e-rugosidade-da-superficie\/","title":{"rendered":"O que \u00e9 rugosidade da superf\u00edcie?"},"content":{"rendered":"<p>A rugosidade da superf\u00edcie \u00e9 muito importante para a maioria das superf\u00edcies envolvidas no contato deslizante. Isso ocorre porque fatores como a taxa original de desgaste e a natureza sustentada s\u00e3o altamente dependentes dessa caracter\u00edstica. Essas superf\u00edcies s\u00e3o geralmente superf\u00edcies de suporte de carga e a rugosidade precisa ser marcada para garantir a adequa\u00e7\u00e3o ao uso pretendido.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"526\" height=\"262\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/surface-roughness.jpg\" alt=\"rugosidade\" class=\"wp-image-6205\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/surface-roughness.jpg 526w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/surface-roughness-300x149.jpg 300w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/surface-roughness-100x50.jpg 100w\" sizes=\"(max-width: 526px) 100vw, 526px\" \/><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Defini\u00e7\u00e3o<\/strong> do<strong> Rigidez da superf\u00edcie<\/strong><\/h2>\n\n\n\n<p>Rugosidade da superf\u00edcie (SR) \u00e9 a rugosidade da superf\u00edcie em nossa medi\u00e7\u00e3o di\u00e1ria, que pode ser entendida como a irregularidade de passo fino e min\u00fasculos picos e vales no processo de processamento de produtos.<\/p>\n\n\n\n<p>Geralmente \u00e9 definida como a dist\u00e2ncia min\u00fascula (dist\u00e2ncia de onda) entre dois picos ou dois dedos m\u00ednimos. Em geral, a dist\u00e2ncia da onda est\u00e1 dentro de 1 mm ou menos, e tamb\u00e9m pode ser definida como a medi\u00e7\u00e3o de micro-perfis, comumente conhecido como valor de micro-erro.<\/p>\n\n\n\n<p>Geralmente avaliamos que haver\u00e1 uma linha de base para rugosidade. O ponto mais alto acima da linha de base \u00e9 chamado de ponto de pico e o ponto mais baixo abaixo da linha de base \u00e9 chamado de ponto de vale. <\/p>\n\n\n\n<p>Ent\u00e3o, a altura entre o pico e o vale \u00e9 expressa por Z; A dist\u00e2ncia entre as microtexturas do produto processado Usamos S para expressar.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"945\" height=\"586\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/baseline-for-roughness.jpg\" alt=\"linha de base para rugosidade\" class=\"wp-image-6206\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/baseline-for-roughness.jpg 945w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/baseline-for-roughness-300x186.jpg 300w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/baseline-for-roughness-768x476.jpg 768w\" sizes=\"(max-width: 945px) 100vw, 945px\" \/><\/figure>\n\n\n\n<p>Em circunst\u00e2ncias normais, o tamanho do valor S \u00e9 definido no padr\u00e3o de verifica\u00e7\u00e3o nacional:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>S \uff1c 1mm \u00e9 definido como SR<br \/>1\u2264S\u226410mm \u00e9 definido como SR<br \/>A Norma Nacional de Verifica\u00e7\u00e3o de Metrologia da China estipula: Normalmente, os tr\u00eas <strong>parametros<\/strong> de VDA3400, Ra e Rmax s\u00e3o usados para avaliar a rugosidade da superf\u00edcie de verifica\u00e7\u00e3o, e a unidade de medida \u00e9 geralmente expressa em <strong>\u03bcm<\/strong>.<\/p><\/blockquote>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Relacionamento de Par\u00e2metro de Avalia\u00e7\u00e3o<\/strong><\/h3>\n\n\n\n<p>Ra \u00e9 definido como o desvio aritm\u00e9tico m\u00e9dio (rugosidade m\u00e9dia) da curva, Rz \u00e9 definido como a altura m\u00e9dia do desn\u00edvel e Ry \u00e9 definido como a altura m\u00e1xima.<\/p>\n\n\n\n<p>A diferen\u00e7a m\u00e1xima de altura Ry do microperfil tamb\u00e9m \u00e9 expressa por Rmax em outros padr\u00f5es.<\/p>\n\n\n\n<p>Consulte a tabela a seguir para a rela\u00e7\u00e3o espec\u00edfica entre Ra e Rmax:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"546\" height=\"426\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Comparison-of-Ra-and-Rmax-parameters-um.png\" alt=\"Tabela: Compara\u00e7\u00e3o dos par\u00e2metros Ra e Rmax (um)\" class=\"wp-image-6207\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Comparison-of-Ra-and-Rmax-parameters-um.png 546w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Comparison-of-Ra-and-Rmax-parameters-um-300x234.png 300w\" sizes=\"(max-width: 546px) 100vw, 546px\" \/><figcaption>Tabela: Compara\u00e7\u00e3o dos par\u00e2metros Ra e Rmax (um)<\/figcaption><\/figure><\/div>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Como \u00e9 formado?<\/strong><\/h3>\n\n\n\n<p>A forma\u00e7\u00e3o de rugosidade superficial \u00e9 causada pelo processo de usinagem da pe\u00e7a. O m\u00e9todo de processamento, o material da pe\u00e7a de trabalho e o processo s\u00e3o todos fatores da rugosidade da superf\u00edcie da imagem.<\/p>\n\n\n\n<p>Por exemplo: Durante a usinagem por descarga el\u00e9trica, a superf\u00edcie da pe\u00e7a usinada apresenta irregularidades de descarga.<\/p>\n\n\n\n<p>A tecnologia de processamento e o material das pe\u00e7as s\u00e3o diferentes, e existem v\u00e1rias diferen\u00e7as nas micro marcas deixadas na superf\u00edcie das pe\u00e7as processadas, como (densidade, profundidade, mudan\u00e7a de forma, etc.).<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Efeito da rugosidade da superf\u00edcie na pe\u00e7a de trabalho<\/strong><\/h3>\n\n\n\n<p>Resist\u00eancia ao desgaste da pe\u00e7a<br \/>Estabilidade de ajuste<br \/>For\u00e7a de fadiga<br \/>Resist\u00eancia \u00e0 corros\u00e3o<br \/>Aperto<br \/>Rigidez de contato<br \/>precis\u00e3o de medi\u00e7\u00e3o<br \/>\u2026<br \/>O revestimento, condutividade t\u00e9rmica e resist\u00eancia de contato, capacidade de reflex\u00e3o e desempenho de radia\u00e7\u00e3o, resist\u00eancia ao fluxo de l\u00edquidos e gases e a circula\u00e7\u00e3o de corrente na superf\u00edcie do condutor ter\u00e3o v\u00e1rios graus de influ\u00eancia.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Base de Avalia\u00e7\u00e3o<\/strong><\/h3>\n\n\n\n<p><strong>\u2460 Comprimento da amostra<\/strong><\/p>\n\n\n\n<p>O comprimento da unidade de cada par\u00e2metro, o comprimento de amostragem \u00e9 o comprimento de uma linha de refer\u00eancia para avaliar a rugosidade da superf\u00edcie. De acordo com o padr\u00e3o ISO 1997, 0,08 mm, 0,25 mm, 0,8 mm, 2,5 mm e 8 mm s\u00e3o geralmente usados como comprimento de refer\u00eancia.<\/p>\n\n\n\n<p><strong>\u2461 Comprimento de avalia\u00e7\u00e3o<\/strong><\/p>\n\n\n\n<p>Consiste em N comprimentos de refer\u00eancia. A rugosidade da superf\u00edcie de cada parte da superf\u00edcie do componente pode n\u00e3o refletir verdadeiramente o par\u00e2metro real de rugosidade em um comprimento de refer\u00eancia, mas precisa levar N comprimentos de amostragem para avaliar a rugosidade da superf\u00edcie. O comprimento de avalia\u00e7\u00e3o sob o padr\u00e3o ISO1997 \u00e9 geralmente N = 5.<\/p>\n\n\n\n<p><strong>\u2462Baseline<\/strong><\/p>\n\n\n\n<p>A linha de refer\u00eancia \u00e9 a linha central do contorno para avaliar o par\u00e2metro de rugosidade. Geralmente, h\u00e1 uma linha m\u00e9dia de quadrados m\u00ednimos e uma linha m\u00e9dia aritm\u00e9tica de contorno.<\/p>\n\n\n\n<p><strong>[Least Squares Midline]<\/strong> \u00e9 o c\u00e1lculo dos m\u00ednimos quadrados dos pontos coletados durante o processo de medi\u00e7\u00e3o.<\/p>\n\n\n\n<p><strong>[Linha central m\u00e9dia aritm\u00e9tica do contorno]<\/strong> Dentro do comprimento de amostragem, fa\u00e7a a \u00e1rea das duas partes do contorno na linha m\u00e9dia igual<\/p>\n\n\n\n<p>Em teoria, a linha m\u00e9dia do quadrado m\u00ednimo \u00e9 uma linha de base ideal, mas \u00e9 dif\u00edcil de obter em aplica\u00e7\u00f5es pr\u00e1ticas, por isso \u00e9 geralmente substitu\u00edda pela linha m\u00e9dia m\u00e9dia aritm\u00e9tica do contorno e uma linha reta com uma posi\u00e7\u00e3o aproximada pode ser usada em seu lugar.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Como obter o valor de rugosidade da superf\u00edcie?<\/strong><\/h3>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"625\" height=\"421\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Formtracer-Avant-series.jpg\" alt=\"S\u00e9rie Formtracer Avant\" class=\"wp-image-6208\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Formtracer-Avant-series.jpg 625w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/Formtracer-Avant-series-300x202.jpg 300w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><figcaption>S\u00e9rie Formtracer Avant<\/figcaption><\/figure><\/div>\n\n\n\n<p>A avalia\u00e7\u00e3o da rugosidade superficial \u00e9 cada vez mais valorizada na ind\u00fastria de transforma\u00e7\u00e3o. Para estudar a rugosidade da superf\u00edcie, voc\u00ea precisa usar uma m\u00e1quina especial, chamada: <strong>instrumento de medi\u00e7\u00e3o de rugosidade de superf\u00edcie<\/strong>.<\/p>\n\n\n\n<p>A maioria dos m\u00e9todos de medi\u00e7\u00e3o de rugosidade de superf\u00edcie corretos e completos, embora usem uma m\u00e1quina de medi\u00e7\u00e3o dedicada, mas em alguns casos, para uma opera\u00e7\u00e3o r\u00e1pida e de baixo custo, voc\u00ea tamb\u00e9m pode usar ferramentas manuais de kit para medir, conforme mostrado abaixo:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"688\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/20200706140957-1-1024x688.png\" alt=\"medi\u00e7\u00e3o de rugosidade de superf\u00edcie\" class=\"wp-image-6210\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/20200706140957-1-1024x688.png 1024w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/20200706140957-1-300x202.png 300w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/20200706140957-1-768x516.png 768w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/20200706140957-1.png 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<p>A folha de compara\u00e7\u00e3o de rugosidade \u00e9 uma amostra \u00e0 base de n\u00edquel feita por eletroforma\u00e7\u00e3o. \u00c9 ideal para processamento de metal e \u00e9 uma ferramenta auxiliar muito eficaz.<\/p>\n\n\n\n<p>As fun\u00e7\u00f5es que podem ser alcan\u00e7adas pela m\u00e1quina de medi\u00e7\u00e3o de rugosidade s\u00e3o diferentes, o m\u00e9todo de avalia\u00e7\u00e3o \u00e9 diferente e o custo tamb\u00e9m \u00e9 diferente. Escolha o modelo mais adequado de acordo com as necessidades de <a href=\"https:\/\/www.kaysuns.com\/pt\/\" target=\"_blank\">fornecedor de acess\u00f3rios para tubos de a\u00e7o inoxid\u00e1vel<\/a>.<\/p>","protected":false},"featured_media":6210,"template":"","categories":[186],"tags":[],"class_list":["post-6204","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Is Surface Roughness? - Stainless Steel Pipe Fittings Supplier<\/title>\n<meta name=\"description\" content=\"Surface roughness is very important for most surfaces involved in sliding contact. 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