Automatic soldering machine manufacturers introduce ten detailed steps for welding equipment repair
1. Ask before moving
For the faulty welding equipment, don't rush to do it without knowing the truth, you should first understand the performance of the equipment, and ask the operator before and after the failure and the phenomenon of the failure. For rusty and complex welding equipment, you should also be familiar with the circuit principle and structural characteristics of the equipment and follow the corresponding regulations. Before disassembling, be fully familiar with the function, location, connection method of each component and the relationship with other surrounding devices. In the absence of wiring diagrams and assembly drawings of the welding equipment, you should draw the sketch while marking while disassembling it, and mark the disassembled object, paying attention to safety.
In general, you should first check the welding equipment for obvious signs of injury, whether the welding machine parts are defective, and understand their maintenance history, service life, observation of the environment and welding process, etc., and then check the welding machine automatically . Before dismantling, remove the surrounding fault factors, such as wiring, grounding, power distribution capacity, and whether the welding process used is correct. Dismantling can only be performed after it is determined that the welding machine is internally faulty. Otherwise, blind disassembly may repair the welding equipment more and more. Such as electrode arc welding, submerged arc welding, tungsten gas shielded arc welding, plasma arc welding and melting electrode gas shielded welding machines.
3. Power first
Inspect the mechanical components and parts of the welding equipment, lubrication, gas, water, and oil systems for problems. Only after confirming that these systems are not faulty, do electrical inspections. When checking circuit faults, you should use testing instruments to find the faulty part and confirm that there are no bad contact faults. Then check the operating relationship between the line and the machine to avoid misjudgments such as spot welding, seam welding, projection welding and Welding and other equipment.
4. Quiet before moving
When the equipment is not powered, judge the quality of the welding equipment buttons, contactors, thermal cut-off electrical components and fuses to determine the location of the fault. Power on test, listen to its sound, measure parameters, judge failure, and finally perform maintenance. If it is impossible to distinguish the three-phase voltage when the input phase of the welding machine is missing, you should listen to it and measure the voltage of each relative location separately to determine which phase is defective.
5. Clear before repair
For welding equipment with heavy pollution, first clean its buttons, wiring points, and contact points, and check whether the external control keys have failed. Many faults are caused by dirt and conductive dust, which are often eliminated after cleaning. Especially in the harsh environment such as construction site.
6. First, then the main
The failure of the power supply part of the automatic soldering machine often accounts for a high proportion of the entire welding equipment failure, so it is often more effective to repair the power input part first. Then check the other auxiliary parts of the welding equipment, such as walking, wire feeding, etc., according to the methods of first outside, then inside, first electricity, first static, and then moving.
7. Universal before special
Failures caused by the quality of parts and electrical components, assembly accessories or other equipment failures generally account for about 50% of common failures. The special faults of welding equipment are mostly soft faults, which are measured and repaired by experience and instruments. It is impossible to judge the on-site failure for a while, and you can also consult the technical staff of the product production unit according to the contact method of the product manual. Do not adjust or change some internal procedures of the equipment such as spot welding, seam welding, projection welding and butt welding without knowing or understanding, otherwise it will cause greater trouble.
8. Peripheral and then control
Don't rush to replace damaged electrical components and electrical components first. When confirming that the peripheral equipment circuits are normal, consider replacing damaged electrical components or inspecting printed circuit boards.
9. DC first and then AC
When inspecting printed circuit boards, you must first check whether the printed circuit boards and components have abnormal heating parts or burn marks. Pay attention to the static electricity of the integrated circuit module, and then check the input signal, the DC circuit static operating point, check the AC circuit dynamic operating point and the output signal for faults, and try to eliminate them.
10. Debug after troubleshooting
For the welding equipment that coexists with debugging and faults, the faults must be eliminated before debugging. Debugging must be performed on the premise that the electrical wiring is completely fault-free and the wiring is correct (including the ground wire). When conditions permit, the welding equipment must be tested for insulation resistance and then debugged or welded. http://hfkjbxg.icu/
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