{"id":212,"date":"2018-01-15T22:57:12","date_gmt":"2018-01-15T19:57:12","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=212"},"modified":"2020-11-02T11:51:16","modified_gmt":"2020-11-02T08:51:16","slug":"stykovaya-svarka-detalej-bez-oplavleniya","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/pt\/soldagem-de-topo-de-pecas-sem-aquecimento\/","title":{"rendered":"Soldagem de topo de pe\u00e7as sem fus\u00e3o"},"content":{"rendered":"<p>Processo de soldagem <strong>sem derreter <\/strong>\u00e9 um dos m\u00e9todos de soldagem de topo. Pertence \u00e0 categoria de soldagem por press\u00e3o. O m\u00e9todo de soldagem \u00e9 baseado em <strong>sem derreter <\/strong>O efeito t\u00e9rmico da corrente el\u00e9trica, baseado na lei de Joule-Lenz, e a subsequente compress\u00e3o das pe\u00e7as soldadas s\u00e3o incorporados. A \u00e1rea da se\u00e7\u00e3o transversal das pe\u00e7as soldadas dessa maneira atinge 200 mm.<sup>2<\/sup> e \u00e9 usado para unir fios, tubos de a\u00e7o de baixo carbono de se\u00e7\u00e3o pequena e barras. Este tipo de soldagem \u00e9 adequado para a\u00e7os estruturais de baixa liga e a\u00e7os de baixo carbono. Soldagem por contato <strong>sem derreter <\/strong>Ele \u00e9 usado com sucesso em ligas de cobre e alum\u00ednio, o que confere a esse m\u00e9todo uma ampla gama de aplica\u00e7\u00f5es.<\/p>\n<h2>M\u00e9todo de soldagem de juntas de topo<\/h2>\n\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t\n<p>Diferente C<strong>m\u00e9todo de soldagem de juntas de topo\u00a0<\/strong>Dois m\u00e9todos permitem o processo tecnol\u00f3gico de soldagem de metais resistentes e de alta qualidade. Um \u00e9 o m\u00e9todo de fus\u00e3o e o outro \u00e9 o m\u00e9todo sem fus\u00e3o. A soldagem sem fus\u00e3o, tamb\u00e9m conhecida como soldagem por resist\u00eancia, envolve aquecer intensamente a pe\u00e7a de trabalho e, em seguida, pression\u00e1-la para baixo, desligando simultaneamente a corrente. <strong>COM<\/strong><strong>m\u00e9todo de soldagem de juntas de topo\u00a0<\/strong>O m\u00e9todo de resist\u00eancia (sem fus\u00e3o) inclui etapas sequenciais de prepara\u00e7\u00e3o das pe\u00e7as e uni\u00e3o das mesmas:<\/p>\n<ul>\n<li>Para garantir o sucesso da soldagem, a superf\u00edcie a ser unida deve ser completamente limpa de sujeira e oxida\u00e7\u00e3o. Quaisquer imperfei\u00e7\u00f5es ou rugosidades da superf\u00edcie devem ser removidas, pois isso impedir\u00e1 o aquecimento uniforme. A limpeza \u00e9 especialmente importante se a \u00e1rea da superf\u00edcie for grande. Se as extremidades n\u00e3o forem bem vedadas, ocorrer\u00e1 oxida\u00e7\u00e3o do metal na superf\u00edcie da junta.<\/li>\n<li>As pe\u00e7as s\u00e3o ent\u00e3o colocadas em grampos de eletrodo e comprimidas. A for\u00e7a de compress\u00e3o \u00e9 significativamente maior do que na soldagem por fus\u00e3o. Isso garante um aquecimento ideal da superf\u00edcie;<\/li>\n<li>Uma corrente el\u00e9trica atravessa o metal, causando r\u00e1pida gera\u00e7\u00e3o de calor nas extremidades das pe\u00e7as. Ocorre deforma\u00e7\u00e3o pl\u00e1stica e a \u00e1rea de contato el\u00e9trico aumenta. Como resultado, a resist\u00eancia total cai para zero. O metal \u00e9 aquecido a uma temperatura de 0,8\u20130,9 T p.l. (T p.l. \u00e9 o ponto de fus\u00e3o do metal). Nessa temperatura, h\u00e1 \u00f3xidos presentes na superf\u00edcie do metal s\u00f3lido. A extrus\u00e3o do \u00f3xido n\u00e3o ocorre completamente;<\/li>\n<li>A perturba\u00e7\u00e3o da corrente come\u00e7a, ou seja, o metal \u00e9 espremido para fora da junta;<\/li>\n<li>Em seguida, ocorre o recalque sem corrente. A press\u00e3o pode aumentar ou permanecer igual \u00e0 press\u00e3o de aquecimento, dependendo do tipo de metal. O recalque deve ser de tamanho ideal e localizado na \u00e1rea da junta, permitindo a expuls\u00e3o do metal superaquecido e dos \u00f3xidos. Uma rebarba se forma ao redor da junta.<\/li>\n<\/ul>\n<p><strong>\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t<\/strong><\/p>\n<p><strong>M\u00e9todo de soldagem de juntas de topo <\/strong>A diferen\u00e7a \u00e9 que a press\u00e3o \u00e9 o principal fator na forma\u00e7\u00e3o de liga\u00e7\u00f5es met\u00e1licas em uma junta soldada. O processo de fus\u00e3o do metal promove a recristaliza\u00e7\u00e3o do metal na junta.<\/p>\n<h3>Soldagem de topo por contato GOST<\/h3>\n<p>A padroniza\u00e7\u00e3o define as condi\u00e7\u00f5es para a execu\u00e7\u00e3o de trabalhos de soldagem pelo m\u00e9todo de soldagem de topo com resist\u00eancia e fus\u00e3o.<strong>Soldagem de topo por contato OST\u00a0<\/strong>especifica defini\u00e7\u00f5es e termos de acordo com as normas ISO 15607 e ISO 6520-2. As especifica\u00e7\u00f5es preliminares para o processo de soldagem de topo devem ser desenvolvidas de acordo com a norma ISO 15609-5.<strong>Soldagem de topo por contato OST<\/strong>\u00a0possui requisitos pr\u00f3prios para testes de soldas de teste. A certifica\u00e7\u00e3o de instaladores de solda por resist\u00eancia est\u00e1 em conformidade com a norma GOST EN 1418. A norma atual cont\u00e9m requisitos para o processo de soldagem por resist\u00eancia de acordo com a norma ISO 4063. <strong>G<\/strong><strong>Soldagem de topo por contato OST\u00a0<\/strong>R ISO 15614-13 e GOST R ISO 15614-14 t\u00eam uma s\u00e9rie de refer\u00eancias normativas a padr\u00f5es internacionais para opera\u00e7\u00f5es de soldagem de topo.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-214 size-full aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/stykovaja.webp\" alt=\"M\u00e9todos de soldagem de juntas de topo\" width=\"500\" height=\"300\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/stykovaja.webp 500w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/stykovaja-300x180.webp 300w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/stykovaja-254x152.webp 254w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-213 size-full aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/1345549438_untitled.fr11-1.webp\" alt=\"Soldagem de topo de pe\u00e7as sem fus\u00e3o\" width=\"338\" height=\"315\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/1345549438_untitled.fr11-1.webp 338w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/1345549438_untitled.fr11-1-300x280.webp 300w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/1345549438_untitled.fr11-1-204x190.webp 204w\" sizes=\"auto, (max-width: 338px) 100vw, 338px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>O processo de soldagem de topo sem rebarba \u00e9 um tipo de soldagem de topo por resist\u00eancia. \u00c9 classificado como\u2026<\/p>","protected":false},"author":1,"featured_media":214,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-212","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-svarka-metallov"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0441\u043f\u043e\u0441\u043e\u0431\u043e\u0432 \u0441\u0432\u0430\u0440\u043a\u0438 \u0441\u0442\u044b\u043a\u043e\u0432\u044b\u0445 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0439 \u0431\u0435\u0437 \u043e\u043f\u043b\u0430\u0432\u043b\u0435\u043d\u0438\u044f, \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f \u0438 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" 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