With the continuous development of production and science and technology, there are many kinds of metal welding methods. According to the characteristics of welding process of spot welder, it can be divided into three categories: fusion welding, pressure welding and brazing. In metal welding, the material to be welded and the material to be welded are called base metal. In addition to the base metal, some welding also needs filler metal and solder. In the processing of glasses, the frame, foot wire, hinge and so on are all base materials; the solder of spot welding machine is easy to melt, which has good strength, plasticity and wettability.
Basic knowledge of eye spot welding: fusion welding. In the process of welding, the base metal and filler metal are melted, which are chemical combination. The fusion welding mainly includes manual welding, plasma welding, laser welding, etc. Press welding. When welding, there is no need of solder, the connected metal is chemical or physical combination, the weld is narrow and the influence area is small. Pressure welding mainly includes resistance flash welding, friction welding, cold pressure welding, etc. Brazing. It is similar to fusion welding, but the essential difference is that the brazing temperature is lower than the base metal temperature. When welding, the brazing filler metal melts while the base metal does not melt, and the two are physically combined.
Brazing belongs to solid phase connection, which is different from the fusion welding method. When brazing, the base metal does not melt, and the filler metal with lower melting temperature than the base metal is used. When the connected parts and solder are heated to solder melting, the liquid solder is used to wet, spread and dissolve and diffuse with the base metal on the surface of the base metal, wet, capillary flow and caulk in the gap between the base metal, and dissolve and diffuse with the base metal to realize the connection between parts.
The spot welding in the production of spectacles, which belongs to the scope of brazing, is defined in principle. During welding, the base metal, i.e. the workpiece to be welded and the workpiece to be welded, such as the frame, foot wire and hinge, will not melt; while the brazing filler metal, i.e. the silver sheet, will melt, and the base metal will be welded through the melting of the brazing filler metal. Due to the contact between the welding gun and the base metal during the welding of spot welder, the range of contact welding and the welding position are mostly in the form of dots, so it is called "spot welding".
English
Chinese
Taobao1
Taobao2
Alibaba Wuxi
Shenzhen Alibaba