{"id":360,"date":"2023-06-20T18:27:04","date_gmt":"2023-06-20T18:27:04","guid":{"rendered":"https:\/\/physigeek.com\/pt\/angulo-de-pressao\/"},"modified":"2023-06-20T18:27:04","modified_gmt":"2023-06-20T18:27:04","slug":"angulo-de-pressao","status":"publish","type":"post","link":"https:\/\/physigeek.com\/pt\/angulo-de-pressao\/","title":{"rendered":"\u00c2ngulo de press\u00e3o"},"content":{"rendered":"

Este artigo explica o que \u00e9 o \u00e2ngulo de press\u00e3o da engrenagem. Al\u00e9m disso, \u00e9 mostrada a import\u00e2ncia do valor do \u00e2ngulo de press\u00e3o na transmiss\u00e3o de for\u00e7as em um mecanismo. <\/p>\n

<\/span> O que \u00e9 \u00e2ngulo de press\u00e3o?<\/span><\/h2>\n

\u00c2ngulo de press\u00e3o<\/strong> \u00e9 o \u00e2ngulo de desvio que ocorre quando os dentes de duas engrenagens entram em contato.<\/p>\n

Mais precisamente, o \u00e2ngulo de press\u00e3o \u00e9 o \u00e2ngulo entre a dire\u00e7\u00e3o da for\u00e7a de contato entre as duas engrenagens e a dire\u00e7\u00e3o da velocidade na engrenagem acionada. <\/p>\n

\"\u00e2ngulo<\/figure>\n

Da mesma forma, o \u00e2ngulo de press\u00e3o de duas engrenagens tamb\u00e9m pode ser definido como o \u00e2ngulo entre a dire\u00e7\u00e3o da for\u00e7a transmitida pelo mecanismo e a dire\u00e7\u00e3o tangencial do dente da engrenagem acionada.<\/p>\n

O \u00e2ngulo de press\u00e3o tamb\u00e9m \u00e9 chamado de \u00e2ngulo de obliquidade<\/strong> . <\/p>\n

<\/span> Valor do \u00e2ngulo de press\u00e3o<\/span><\/h2>\n

O valor padr\u00e3o do \u00e2ngulo de press\u00e3o<\/strong> entre duas engrenagens est\u00e1 entre 14,5\u00ba e 20\u00ba. Anteriormente, eram utilizados \u00e2ngulos de press\u00e3o pr\u00f3ximos de 14,5\u00b0. Hoje, as engrenagens s\u00e3o geralmente fabricadas com um \u00e2ngulo de press\u00e3o de 20\u00b0.<\/p>\n

O valor do \u00e2ngulo de press\u00e3o afeta as for\u00e7as que atuam sobre uma engrenagem, pois quanto menor o \u00e2ngulo de press\u00e3o, maior ser\u00e1 a for\u00e7a transmitida ao sistema de engrenagens. Por outro lado, dentes com \u00e2ngulos de press\u00e3o baixos s\u00e3o mais fracos. Devemos, portanto, encontrar um equil\u00edbrio para otimizar estes dois fatores.<\/p>\n

Como exemplo, o \u00e2ngulo de press\u00e3o de um mecanismo de cremalheira e pinh\u00e3o \u00e9 mostrado abaixo: <\/p>\n

\"\"<\/figure>\n
\"for\u00e7as<\/figure>\n

A for\u00e7a tangencial \u00e9 a for\u00e7a utilizada, ou seja, a for\u00e7a que provoca o movimento da engrenagem acionada e, portanto, a for\u00e7a que transmite a pot\u00eancia \u00fatil. Portanto, queremos que o \u00e2ngulo de press\u00e3o seja pequeno para que seja transmitida a maior for\u00e7a tangencial poss\u00edvel.<\/p>\n

Al\u00e9m disso, se o \u00e2ngulo de transmiss\u00e3o for pequeno, significa que a for\u00e7a axial (ou for\u00e7a radial) que aparece entre as duas engrenagens tamb\u00e9m \u00e9 pequena, significando menor desgaste dos dentes.<\/p>\n","protected":false},"excerpt":{"rendered":"

Este artigo explica o que \u00e9 o \u00e2ngulo de press\u00e3o da engrenagem. Al\u00e9m disso, \u00e9 mostrada a import\u00e2ncia do valor do \u00e2ngulo de press\u00e3o na transmiss\u00e3o de for\u00e7as em um mecanismo. O que \u00e9 \u00e2ngulo de press\u00e3o? \u00c2ngulo de press\u00e3o \u00e9 o \u00e2ngulo de desvio que ocorre quando os dentes de duas engrenagens entram em …<\/p>\n

\u00c2ngulo de press\u00e3o<\/span> Leia mais »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[10],"tags":[],"class_list":["post-360","post","type-post","status-publish","format-standard","hentry","category-maquinas-e-mecanismos"],"yoast_head":"\n\u25b7 O que 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