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图1所示的螺丝头部再套加一个镀铬的铜装饰帽,螺丝头部攻有M3螺纹,铜帽上焊接M3螺栓,铜帽上和M3螺栓连接,采用银料气焊,不仅耗费昂贵的银,而且气焊加工效率低,质量不稳定。在普通电阻焊机上对M3铜合金进行凸焊加工,效果良好,降低了成本,稳定质量,为企业提高了效益。凸焊原理和主要焊接参数凸焊是在被焊一组工件中的一件上预加工凸台,与另一工件接触,在压力下通过焊接的一种电阻焊接方法。其主要原理是电阻生热,熔化接触金属,在压力下使金属紧密焊接。在生产中,其主要的焊接参数有:凸台尺寸和形状、电极压力、焊接时间、焊接电
The screw head shown in FIG. 1 is additionally provided with a chrome-plated copper decoration cap, screwed with M3 thread on the head of the screw, M3 screwed on the copper cap, and bolted to the M3 on the copper cap. The silver gas welding is not only costly Silver, and gas welding processing efficiency is low, the quality is not stable. In the ordinary resistance welding machine on the M3 copper alloy convex welding processing, the effect is good, reducing costs, stabilizing quality, improve efficiency for the enterprise. Projection welding principle and the main welding parameters Projection welding is welding a set of parts in a pre-processing boss, and the other parts in contact with the pressure by welding a resistance welding method. The main principle is resistance heat, melting the contact metal, the metal under pressure to weld. In production, the main welding parameters are: boss size and shape, electrode pressure, welding time, welding electricity