Summarization of maintenance experience of ultrasonic point melting machine

Due to improper use or due to the ultrasonic point melting machine itself, it is inevitable that there will be failure, so in this case, what should we do? How to make maintenance concise and more efficient? Xiaobian summarizes some basic principles of ultrasonic spot welding machine maintenance for your reference:



1. Start talking before you start

For the ultrasonic spot welding machine with fault, do not start to repair in an emergency, should first inquire about the fault before and after the process and fault phenomenon. For not very familiar with the ultrasonic spot welding machine, but also should be familiar with the circuit principle and structural characteristics, abide by the corresponding rules! Before disassembly, we should fully understand the function, position, connection mode and the relationship between each electrical component and other devices around it. In the case of no assembly diagram, we should disassemble, draw sketches and mark up to facilitate follow-up work and avoid mistakes.



2. First external and then internal

Before maintenance, should first check the maintenance of the ultrasonic spot welding machine has no obvious maintenance history, ultrasonic welding conditions, ultrasonic mold temperature, service life, and so on, and then check the machine. Before disassembly, the surrounding fault factors should be eliminated, and the disassembly can only be carried out after the internal fault of the ultrasonic spot welding machine is determined. Otherwise blind disassembly, the equipment may be repaired worse.



3, first mechanical after electrical

First of all, you should first eliminate the problems in the ultrasonic mold, and then carry out the electrical inspection. When inspecting the circuit fault, the detection instrument should be used to find the fault location. After confirming that there is no bad contact fault, the operation relationship between the line and the machine should be targeted to avoid misjudgment.



4. First static and then dynamic

When the equipment is not energized, first judge the quality of electrical equipment buttons, contactors, relays and fuses, so as to determine the fault. Power on test, listen to its sound, touch, measure parameters, judge the fault, and finally repair.



5. Clean first and then repair

For the heavily polluted Ultrasonic spot welder, clean the buttons, wiring points and contact points first, and check whether the external control keys are out of order. Many faults are caused by dirt and too much dust and electrical conductivity, once cleaning faults are often eliminated.



6, the first power amplifier board after the equipment

The failure rate of the power amplification part of the ultrasonic spot welding machine accounts for a high proportion in the whole ultrasonic equipment, so the first overhaul of the power amplification part of the ultrasonic generator can often get twice the result with half the effort.



General after special

The faults caused by the quality of assembly parts or manufacturing process generally account for about 50% of common faults. The faults of ultrasonic equipment are mostly rigid faults. It is necessary to check and eliminate the problems clearly before easily starting the experiment.



8, after the first peripheral internal

Do not rush to replace the damaged electrical parts, and consider replacing the damaged electrical parts after confirming that the circuit of the peripheral equipment is normal.



9. Debugging after failure

In some cases, all the damaged parts have been replaced, but they are still abnormal, which requires checking the debugging of the protection system of the ultrasonic spot welder. Large current protection, large frequency protection, the premise is that the frequency modulation inductor must be in the right position, if the deviation from the normal position too far, in the process of debugging may damage the amplifier board, the inductor must be rotated to the normal position before debugging.