Permanent magnet chuck after long-term work, it will lead to poor insulation and other failures, and finally will cause the electromagnetic chuck burned out can not continue to use, work has to carry out, buy a new electromagnetic chuck is not cost-effective, limited budget, permanent magnet chuck maintenance costs are higher, after dismantling, the magnetic coil insulation process inside the permanent magnet magnet is more complex, more difficult to repair. Permanent magnet chuck maintenance how to do?

One: What are the steps of permanent magnet chuck maintenance methods

1. Press the operating button of the grinding wheel motor to start the switch of the electric permanent magnet chuck. Note: the workpiece cannot be drawn, the contact of the relay is interlocked, and the grinding wheel motor cannot be started.

2, open the special distribution box of the machine tool, use the measuring pen to detect whether there is electricity at both ends of the fuse, and then use the multimeter 500V to measure the power supply voltage to 380V.

Disconnect the main power switch, check whether the communication contactor is mechanically stuck, remove one of the contactor coil wires, and continue to use the multimeter to measure the resistance at both ends of the coil. If the multimeter pointer indicates normal, it proves that the coil is excellent and there is no problem.

3. Connect the coil wire, disassemble the undervoltage relay housing, measure the resistance at both ends of the coil, if the multimeter pointer still shows normal, it means that the undervoltage relay coil is not open, and then check whether the relay is mechanically stuck.

Permanent magnet chuck maintenance
Then close the power switch, and use the multimeter communication file to measure the transformer sub-side voltage to 135V, and convert the DC stop to measure the voltage at both ends of the rectifier diode. Under normal circumstances, the DC voltage standard value of the bridge rectifier output is 110V, and there is no voltage output at the moment.

4. Disconnect the main power switch, measure the four rectifier diodes with a multimeter electric block, and find that there are problems with two pipes.

5. Weld the wire connecting the diode, remove the diode, and carry out a measurement check again to prove that the tube has been broken down. Replace the two new secondary tubes, connect the wires, and check whether the welding is in good condition.

6. Close the main power switch, measure both ends of the rectifier diode with the multimeter and the DC gear. If the voltage indicates, the voltage value is 110V. The operator presses the button of the wheel motor to start the switch of the permanent magnet chuck, the workpiece can be sucked, and the maintenance and detection of the permanent magnet chuck is over!

Two: Manual permanent magnet suction cup disassembly
Note: The series method of the disk when the manual permanent magnet chuck is disassembled is mainly the positive and negative series of the permanent magnet chuck and the bottom line connection in place. It is very convenient to use. When connecting the wire in series, pay attention to the wrapping of the external protective layer to avoid the exposure of the wire, causing the virtual connection of the electromagnetic chuck to cause ignition, and damaging the electromagnetic chuck control system.

Manual permanent magnet chuck disassembly diagram：