How do we test if the friction welding machine fails

How do we test if the friction welding machine fails

The conflict welding machine can be divided into two kinds: continuous drive conflict welding machine and inertia conflict welding machine. Continuous drive conflict

welding machine: the motor drives a workpiece to rotate, together with the other workpiece press to rotate the workpiece, so that the contact surface conflicts with

each other to produce heat and certain plastic deformation, and then stop the rotation, together to apply the forging pressure to complete the welding. The welding

quality is related to speed, collision time, collision pressure, overforging pressure and workpiece overforging deformation. Inertia conflict welding: the flywheel is driven

by the motor to reach the required speed, and then a workpiece is pressed to the rolling workpiece held on the flywheel shaft, the conflict resistance between the

workpiece slows down the flywheel, and converts the kinetic energy of the flywheel into the heat energy required for welding. The welding quality is related to the

flywheel inertia moment, speed and forging force. The conflict welding machine used for conflict welding includes a drive system (the inertia conflict welding machine

also includes a flywheel) and a pressurizing device. The automatic welding machine also has loading and unloading equipment, stripping equipment and automatic

parameter monitoring system.

Conflict welding machine is a kind of machine that uses the heat generated by the conflict between the end faces of the workpiece to reach the plastic state, and then

the method of overforging to complete the welding. When copper and aluminum friction welding machine turns the workpiece, the chips are often firmly stuck to the

tool head, and partial welding will occur when the shaft and the bearing shell are not smooth. Conflict welding is created from these phenomena. The fault judgment

of the conflict welding machine is generally caused by the power grid voltage or internal short circuit. Replace the bridge when the internal short circuit is removed.

When dealing with faults on site, it is necessary to check the status of the user's power grid, such as power grid voltage, and whether there is equipment such as welding

machines that pollute the power grid. It is usually caused by motor or cable damage and drive circuit fault. After correcting the drive circuit, the friction welding machine

manufacturer tests the drive waveform in good condition, replace the module. After replacing the drive board in the field service, it is also necessary to check the motor

and connecting cables. Run the inverter when it is determined that there is no fault.

Generally because the switching power supply is damaged or the soft charging circuit is damaged so that the direct current circuit is not caused by direct current,

such as the start resistance is damaged, it may also be the panel damage. Generally due to input phase deficiency, circuit aging and circuit board caused by moisture.

Find out its voltage detection circuit and detection point, replace the damaged equipment. Friction welding equipment is generally due to current detection circuit damage. Such as hall components, operational amplifiers, etc. It is usually caused by damage to the drive circuit or inverter module. The no-load output voltage is normal, and the overload or overcurrent after loading is generally caused by improper parameter setting or aging of the drive circuit and module damage. Find the P end and N end of the DC power supply inside the inverter, adjust the multimeter to the resistance X10, the red meter rod is connected to P, the black meter rod is separated from R, S, T, there should be a resistance value of about tens of ohm, and the fundamental balance. Instead, the black bar is connected to the P terminal, and the red bar is successively connected to R, S, and T, with a resistance value approaching infinity. Connect the red watch rod to the N end, repeat the above process, and the same results should be obtained. If the friction welding has the following results, it can be determined that the circuit has shown an anomaly, A. The resistance value is unbalanced in three phases, which can explain the fault of the rectifier bridge. B. When the red meter rod is connected to the P end, the resistance is infinite, and it can be determined that the rectification bridge is faulty or the starting resistance is faulty.

The red bar is connected to the P end, and the black bar is separated from the U, V, and W, there should be a resistance value of tens of ohm, and the resistance value

of each phase is fundamentally the same, and the inverse phase should be infinite. Connect the black watch rod to the N end, repeat the above process should get the

same result, otherwise it can be concluded that the inverter module fault after the static test results are normal, dynamic test can be carried out, that is, power on the

test machine.

If it can not be solved, you can contact the friction welding machine manufacturer.