The difference between spot welding machine and electric welding machine is introduced

Friends who have just come into contact with welding equipment may mix spot welding machine and electric welding machine into a kind of equipment. This is actually a wrong concept. Today, according to this problem, I will explain in detail the difference between spot welding and electric welding and what are their respective characteristics, hoping to help everyone increase their mechanical knowledge.

spot welding machine :

resistance spot welding is referred to as spot welding. it is a resistance welding method in which weldments are assembled into lap joints and pressed between two electrodes, and the base metal is melted by resistance heat to form solder joints.

When working, the two electrodes press the workpiece to form a certain contact resistance between the two layers of metal under the pressure of the two electrodes, while the welding current flows from one electrode to the other electrode to form an instantaneous thermal fusion at the two contact resistance points. The spot welding machine has short heating time and concentrated heat, so the heat affected zone is small, and the deformation and stress are also small. Usually, it is not necessary to arrange correction and heat treatment processes after welding.

The welding process does not require filler metals such as welding rods and welding wires, as well as welding materials such as oxygen, acetylene, and argon. The welding cost is low, more environmentally friendly, simple to operate, easy to realize mechanization and automation, and improved labor costs. High productivity, and no noise and harmful gases, in, suitable for mass production.

electric welding machine:

electric welding machine uses electric energy to instantly convert electric energy into heat energy. The electric welding machine is suitable for working in a dry environment without too many requirements. Because of its small size, simple operation, convenient use, fast speed, it is favored by the market, especially for parts with high strength, the same metal materials or dissimilar metal materials can be connected instantly, but the welding method is different. After heat treatment, the weld has the same strength as the base metal and has better sealing performance. This solves the problem of sealing and strength for the manufacture of stored gas and liquid containers.