What is the difference between spot welding machine and electric welding machine?

spot welding machine and electric welding machine are the same thing, don't say many customers will make mistakes, sometimes even Baidu feels puzzled. Today, the small editor of Sturt Science and Technology will solemnly declare to everyone that spot welding machine and electric welding machine are not the same product. One is to melt the welding rod by arc, and the other is to melt the base metal by resistance heat.

What is the difference between spot welder and electric welder?

1. Different welding principles

(1) Electric welder uses the high-temperature arc generated by the positive and negative poles in an instant short circuit to melt the solder on the electrode and the material to be welded, so that the object to be contacted can be combined. Its structure is very simple, is a high-power transformer. Welding machine generally according to the type of output power can be divided into two kinds, one is AC power, one is DC.

(2) spot welding machine adopts the principle of double-sided double-point over-current welding. when working, the two electrodes pressurize the workpiece so that the two layers of metal form a certain contact resistance under the pressure of the two electrodes. when the welding current flows from one electrode to the other electrode, an instantaneous thermal fusion is formed at the two contact resistance points, and the welding current instantly flows from the other electrode along the two workpieces to this electrode to form a loop, and will not damage the internal structure of the welded workpiece.

2, Different Welding Advantages

(1) Electric welding machine uses electric energy to convert electric energy into heat energy instantly. Electricity is very common. Electric welding machine is suitable for working in dry environment without too many requirements. Due to its advantages of small size, simple operation, convenient use, fast speed, strong welding seam after welding, etc., it is widely used in various fields, especially for parts requiring high strength.

(2) spot welding machine heating time is short, heat concentration, so the heat affected zone is small, deformation and stress is also small, usually after welding do not have to arrange correction and heat treatment process. Also, spot welder welding does not require filler metals such as welding rods and welding wires, as well as welding materials such as oxygen, acetylene, and argon. The medium frequency spot welding machine has low welding cost, more environmental protection, simple operation, easy realization of mechanization and automation, and improved labor cost. High productivity, and no noise and harmful gases, in mass production, can be made with other manufacturing processes to the assembly line.

3, Different Welding Disadvantages

(1) During the use of the welding machine, a certain magnetic field will be generated around the welding machine. When the arc burns, it will generate radiation to the surrounding. The arc light includes infrared rays, ultraviolet rays and other light species, as well as harmful substances such as metal vapor and smoke. Therefore, sufficient protective measures must be taken during operation. Welding is not suitable for high carbon steel welding, due to welding weld metal crystallization and segregation and oxidation process, for high carbon steel welding performance is poor, easy to crack after welding, hot crack and cold crack.

(2) The equipment cost of spot welding machine is much more expensive than that of electric welding machine, especially the medium frequency inverter spot welding machine, which has much higher technical content, but it is really easy to use!

4. Operator Requirements Different

(1) The welding machine must be operated by welders with operation certificates.

(2) The operation of spot welding machine basically has no threshold, and it can be started as a general worker.