{"id":216,"date":"2018-01-17T23:01:43","date_gmt":"2018-01-17T20:01:43","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=216"},"modified":"2020-11-02T11:50:29","modified_gmt":"2020-11-02T08:50:29","slug":"dugo-pressovaya-svarka","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/it\/saldatura-ad-arco\/","title":{"rendered":"Saldatura ad arco"},"content":{"rendered":"<p><strong>Saldatura ad arco <\/strong>Un tipo di saldatura relativamente nuovo utilizzato per unire parti con un focus ristretto. Viene utilizzato principalmente per unire parti (come i perni) a una piastra metallica. Una caratteristica di questa saldatura \u00e8 che il pezzo stesso funge da elettrodo. Se il pezzo \u00e8 realizzato in acciaio non legato o bassolegato, viene utilizzato un anello di supporto in flusso per proteggere la saldatura dall&#039;ossidazione. Quando il pezzo \u00e8 realizzato in metalli leggeri o pesanti, vengono utilizzati gas di protezione speciali. Tali gas possono essere azoto o anidride carbonica. Parametri accettabili del pezzo unito:<\/p>\n<ul>\n<li>il tubo pu\u00f2 avere un diametro da 6 mm a 219 mm, spessore della parete 10 mm;<\/li>\n<li>Sezione piena grezza, diametro massimo 32 mm.<\/li>\n<\/ul>\n\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t\n<p>Il processo di tale saldatura:<\/p>\n<ul>\n<li>il pezzo in lavorazione \u00e8 preparato per la saldatura;<\/li>\n<li>il pezzo da lavorare viene inserito in uno speciale dispositivo di saldatura (pistola di saldatura);<\/li>\n<li>portato alla piastra o alla piastra metallica su cui verr\u00e0 saldato;<\/li>\n<li>viene fornita corrente, viene eccitato un arco di saldatura, fondendo i metalli da unire;<\/li>\n<li>Il circuito elettrico viene scollegato e le parti vengono collegate colpendo uno spillo.<\/li>\n<\/ul>\n<p>Gli ossidi metallici e i contaminanti vengono rimossi insieme al metallo liquido. La qualit\u00e0 di questa connessione \u00e8 sufficientemente elevata da sopportare carichi significativi.<\/p>\n<p>\u00c8 stato sviluppato un sistema per il mantenimento automatico della distanza dell&#039;arco di saldatura, aumentando significativamente l&#039;efficienza del processo di giunzione. Questa tecnologia si basa sulle leggi della fisica: l&#039;arco elettrico si muove in un campo magnetico trasversale. Questo campo \u00e8 generato da magneti permanenti tra le estremit\u00e0 dei pezzi da saldare. La velocit\u00e0 relativamente elevata dell&#039;arco fa s\u00ec che la sua potenza venga ridistribuita su tutta la superficie del pezzo. Ci\u00f2 garantisce un riscaldamento uniforme delle estremit\u00e0 da saldare. Per massimizzare il riscaldamento superficiale, la distanza dell&#039;arco tra le estremit\u00e0 dei pezzi viene mantenuta entro limiti specifici. <strong>Saldatura ad arco <\/strong>Nel mondo moderno, la saldatura ha fatto passi da gigante. Le attrezzature per la saldatura possono funzionare in due modi:<\/p>\n<ol>\n<li>Accelerato;<\/li>\n<li>Dugov.<\/li>\n<\/ol>\n\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t\n<p>Il metodo accelerato \u00e8 molto rapido e consente l&#039;utilizzo di perni con qualsiasi punta. Il pezzo pu\u00f2 essere saldato su una superficie metallica sporca o unta, purch\u00e9 lo spessore non superi 0,6 mm. Un gas di protezione protegge il bagno di saldatura. L&#039;uso del gas di protezione \u00e8 particolarmente importante nella saldatura dell&#039;alluminio. I perni da saldare possono essere realizzati in vari materiali e dimensioni.<\/p>\n<p>Il metodo ad arco non \u00e8 molto diverso dal metodo accelerato. Viene utilizzato per saldare perni sovrapposti di varie forme geometriche su una superficie metallica, il cui spessore deve essere almeno 1\/4 del diametro del perno. Rondelle ceramiche vengono utilizzate per proteggere il bagno di saldatura dagli agenti esterni. <strong>Saldatura ad arco <\/strong>\u00a0Salda i metalli in modo sicuro utilizzando l&#039;attrezzatura di saldatura Alpha 850 ad alta precisione, che utilizza un metodo ad arco prolungato a ciclo breve. Anche le attrezzature di saldatura Nelweld utilizzano questo metodo. Le applicazioni per questo tipo di saldatura includono:<\/p>\n<ul>\n<li>nell&#039;ingegneria dei trasporti, nella costruzione di carrozze e nella cantieristica navale;<\/li>\n<li>nella fabbricazione di strumenti chimici;<\/li>\n<li>per il fissaggio rigido nella produzione di apparecchi di illuminazione<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-217 size-full aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/image183.webp\" alt=\"Saldatura ad arco\" width=\"480\" height=\"246\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/image183.webp 480w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/image183-300x154.webp 300w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/image183-254x130.webp 254w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-218 size-full aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/plazmenno-svarka-300.webp\" alt=\"Foto di saldatura ad arco\" width=\"300\" height=\"232\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/plazmenno-svarka-300.webp 300w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/plazmenno-svarka-300-246x190.webp 246w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>La saldatura ad arco \u00e8 un tipo di saldatura relativamente nuovo, utilizzato per unire parti con un punto focale ristretto. \u00c8 principalmente...<\/p>","protected":false},"author":1,"featured_media":217,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-216","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-svarka-metallov"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- 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