The collision welding machine is actually a resistance welding machine, and its welding principle is to use the resistance heat and a large amount of plastic deformation energy in the welding area to make the two separated metal atoms close to the lattice distance to form a metal bond, and produce a sufficient amount of common grains on the joint surface to obtain welding points, welds or butt joints.
Collision welding: The workpiece is placed on the chuck, and the two ends of the joint are tightly pressed against each other. A large amount of current is conducted through the chuck to the workpiece, generating high temperature through the contact surface. When the metal reaches a plastic state, appropriate pressure is applied to the moving end to compress and join the two ends.
Common maintenance methods for welding machines
1. Visual inspection of the welding machine
The visual inspection of such faults mainly relies on visual and auditory inspection. For example, fuse breakage, wire breakage, connector detachment, electrode aging, etc.
2. Check the power supply of the welding machine
When the visual inspection is completed and the fault cannot be eliminated, power supply inspection can be carried out. Measure the input and output voltage of the control transformer, as well as the power supply voltage, using a multimeter; Measure the waveform of the test point with an oscilloscope, identify the location of the fault, and carry out repairs.
3. Collision welding machine replacement method
If conditions permit, a normal solder mask controller can be used as a substitute to determine the specific location of the fault and quickly identify the cause of the fault. Even if the cause of the malfunction cannot be immediately identified, the scope of inspection can be narrowed down to avoid wasting unnecessary inspection time.
4. Experiential method
Welding machine repair personnel should memorize the fault phenomena and troubleshooting methods introduced in the "Maintenance Guide" of the spot welding equipment manual. And, accumulate and timely summarize the causes and troubleshooting methods of previous failures. When similar faults occur again, you can quickly identify the fault point and eliminate it based on the troubleshooting methods in the manual or previous repair experience.
The difference in principle between touch welding machine and spot welding machine
Principle of Welding Machine
A collision welding machine uses the high-temperature arc generated by the instantaneous short circuit between the positive and negative poles to melt the solder and the material being welded on the welding electrode, in order to achieve the purpose of bonding them together. The structure of an electric welding machine is very simple, in other words, it is a high-power transformer that converts 220V AC power into a low voltage, high current power source, which can be DC or AC.
Principle of spot welding machine
The method of welding by applying pressure through electrodes and utilizing the resistance heat generated by current passing through the contact surface and adjacent areas of the joint after welding is called resistance welding. Resistance welding has the characteristics of high production efficiency, low cost, material saving, and easy automation. Therefore, it is widely used in various industrial sectors such as aviation, aerospace, energy, electronics, automobiles, and light industry, and is one of the important welding processes.
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