What is a micro-spot welding head

Spot welding head is used in resistance welding equipment, and it is in direct contact with the object to be welded to directly supply current and pressure to the object to be welded. There are many kinds of spot welding heads, including butt welding heads and micro-spot welding heads.

Butt welding head

It is divided into upper and lower parts. When welding, the object to be welded is located in the center of the upper and lower parts. The current passes through the object to be welded and generates heat on the object to be welded. Sometimes heat is generated primarily through the contact surface of the object to be welded and the welding head. See which part of the current loop has high resistance. In the current loop, if the resistance of that part is large, then the heat is mainly generated in that part. Therefore, in the butt welding, the resistance of the welding head is very important.

Micro spot welding head

The micro-spot welding head is the corresponding welding head of the microelectronic spot welding machine. Its characteristic is that the welding head and the welding machine form a loop. The current flows through this circuit, and the heat is generated at the high end of the welding head. The welding head actively heats up and is welded. The object does not actively heat up, and the welding head contacts the object to be welded, and instantly transfers heat to the object to be welded, and the object to be welded is melted and welded to another object to be welded in contact.

In the spot welding equipment, when the welding head is welding the thinner metal wire, it is necessary to press the welding head on the two thin metal wires to be welded, and the metal wires are welded together through the effect of high temperature. In the process of winding the coil by the winding machine, manual welding is generally used when welding the coil wire by the welding head. However, because the welding head is easy to wear and accumulate foreign matter, it is necessary to clean the welding head frequently. Therefore, the welding power is low and the welding quality is unstable, which seriously affects the output power of the winding coil and the coil quality.

Common spot welding head materials are chromium zirconium copper, aluminum oxide copper, beryllium copper, tungsten copper, etc. Under normal circumstances, spot welding machine manufacturers use chromium zirconium copper spot welding heads, which can spot weld cold and hot rolled plates, stainless steel plate. In the case of high power spot welding machine, you can choose beryllium copper spot welding head; aluminum copper spot welding head is generally used for welding galvanized steel, because the chemical substance and hardness inside are more suitable for galvanized steel, other material spot welding heads are because His high hardness affects his conductivity.