焊接是利用热能或压力或两者共用,并且加填充材料或不加填充材料将金属零件连接成一体的方法,实质上是两个或几个物体之间局部实现原子结合的方法,由于这种方法有连接强度高,结构重量轻,节约金属材料,施工简便,生产率高,施工时噪音小,焊缝致密不易渗漏,焊接构件成本较低等优点,因而在机械制造装配中得到广泛的应用。 Welding is the use of heat or pressure or a combination of both, and with or without filler material to join the metal parts into one method, in essence, two or more objects between the local atomic binding method, as a result of this The method has the advantages of high connection strength, light weight of the structure, saving of metal materials, simple construction, high productivity, low noise during construction, less leakage of dense weld, lower cost of welded components and the like, and thus has been widely used in machinery manufacturing and assembly .