Особенности применения разных способов контактной сварки

17.06.2013Применяется оборудование, в том числе машина точечной сварки, в различных отраслях промышленности, благодаря методу можно достичь высокой степени механизации, автоматизации, роботизации производства. Любой аппарат контактной сварки использует следующий принцип – кратковременный нагрев деталей до пластичности электрическим током с одновременным применением усилия сжатия. Скорость нагрева и пластической деформации при этом высока. В промышленности распространены несколько способов контактной сварки. Аппарат точечной сварки используется приблизительно в 80-ти процентах соединений. Метод широко применяют в радиоэлектронике, производстве автомобилей, вагоно- и самолетостроении, строительстве. К примеру, конструкция современного авиалайнера насчитывает миллионы сварных точек. Толщины свариваемых деталей варьируют от нескольких микрон до 0,03 м. 

Стыковая сварка, занимая второе место (около 10%) оплавлением применима в строительстве трубопроводов, железнодорожных путей, автомобильной промышленности. С помощью метода соединяют бесстыковые ж/д- пути, трубы разного диаметра, ободья колес. Диапазон используемых материалов достаточно широк – конструкционные стали, латунь, сплавы цветных металлов. 

На третье место по области применения (~ 7%) выходит шовная контактная сварка. Особенно хорошо себя зарекомендовал метод при производстве герметичных резервуаров, в том числе таких, которые предполагается использовать под давлением. С помощью шовной сварки изготавливают топливные баки самолетов, автомобилей, плоские отопительные радиаторы, емкости стиральных машин, холодильные шкафы и пр. Метод позволяет получать надежные соединения, способные выдерживать высокие нагрузки в условиях вакуума или крайне высокого давления.  Метод стыковой сварки сопротивлением используется с ограничениями, поскольку равномерный нагрев торцевых окончаний обеспечить не удается. Вследствие этого надежный контакт по всей поверхности стыка не может быть получен. Применяют способ при соединении изделий малого круглого сечения (проволоки, стрежней, труб и пр.). Около 3% соединений приходится на рельефную сварку. Как пример использования метода, можно указать: в автомобилестроении – крепление к капоту транспортных средств скобы; в радиоэлектронике – крепление к тонким деталям проволоки и пр. 

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