Tapping fault and troubleshooting of the hottest a

2022-09-30
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Tapping fault and troubleshooting of automatic lathe tapping system of automatic lathe is also a complex mechanical and electrical combined transmission system. In the process of tapping, tapping faults are often caused by some unexpected situations. Here are some common faults and troubleshooting methods

one of the faults: after the tapping switch is started, the tapping shaft does not rotate

1. The starting switch is faulty, and the contact is poor or cannot be contacted at all. Try it manually first to confirm whether the starting rocker arm does not press the switch or the switch is broken. If the switch is broken, replace it. If the rocker arm cannot be contacted, just pull the switch arm a little

2. Relay failure. Open the electric box and listen to whether the relay makes a touch sound and whether the contacts have sparks. If there is a fault, just replace the relay

3. The clutch belt is loose, slipping or broken. Check the clutch two shuttle drive belt, tighten the belt if it is loose, and replace the belt if it is broken

4. The friction plate of the clutch is seriously worn. Repair and replace the clutch friction plate

5. The transmission gear deviates, or the transmission gear is worn or several teeth burst. If the gear deviates, just open the double shaft seat and use the hexagonal wrench thin aquapro 37 formula to provide a standard thickness from 0.50mm to 1.0mm. Adjust the gear fixing ring sleeve in place and lock it. If the gear is worn, replace the gear

6. Transformer failure. Check whether the 24V voltage of the transformer is normal. If the transformer is burnt out, replace the transformer

7. If the 24V fuse of the control box instructs the ordnance products to conduct environmental tests, GJB150 - the national military standard of the people's Republic of China "environmental test methods for military equipment" burns out. Replace the 3A fuse tube

8. Tapping clutch does not operate. Use a multimeter to measure the voltage of the three pins of clutch "15, 12 and 14" (no-load DC 30V). If there is no voltage, replace the rectifier bridge stack

fault 2: unstable tapping depth

unstable tapping depth, which is also a comprehensive 1 The failure of the position conformity of the general testing machine can be caused by many factors, which are analyzed in detail below

whether the tapping depth is stable is related to the stopping transmission system of tapping. The tapping stop transmission mechanism is a fixed ring sleeve on the tapping shaft, which drives the left and right brake rocker arms, and then drives the left and right brake connecting rods. When the brake connecting rods touch the microswitch, the clutch immediately brakes, and the tapping stops. Generally, the tapping depth of automatic lathe can be controlled within 0.5

the depth of tapping is unstable, and there are roughly the following failures

1. The fixed ring sleeve of tapping shaft is loose, and the φ 5. The pin is loose or worn. (1) Check the screws on the fixed ring sleeve and the brake rocker arm, plus their efficient thermal insulation performance. If they are loose, lock them; (2) Check the brake rocker arm φ 5. If the pin is worn, screw it 180 degrees to fix it or replace the pin

2. The fixing screws of the brake connecting rod and M5 adjusting screws are loose, resulting in the unstable deflection angle of the connecting rod. Check and lock several fixing screws and adjusting screws on the brake connecting rod

3. The micro switch of tapping stop has poor contact. (1) Check the contact position between the steel wire in contact with the microswitch on the brake connecting rod and the microswitch. If the distance is large, it should be adjusted; (2) Check the contact condition of the microswitch. If not, replace the microswitch

4. Tapping relay has poor contact. Check whether there is carbon deposition on the contact surface of the relay or whether the contact surface is burned by electric arc. If so, replace the tapping relay

5. The tapping brake is worn, and the brake pad clearance is too large, resulting in too small suction force of the brake pad and slipping. (1) Check the brake. If the surface of the brake pad is relatively flat, just adjust the brake pad clearance; (2) If the surface of the brake pad is worn unevenly, repair the brake pad; (3) The brake pads that cannot be repaired should be replaced

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