In this installment,

Konnra Electronics

engineers will tell you about the causes of poor crimping of the electronic harness and its consequences. I hope that after reading the user's friends, I can remember these problems and consequences, and try to avoid these areas in practice.

1. Excessive crimping of the skin

Bad cause: The crimping gesture is incorrect or the baffle is improperly adjusted, causing the crimping part of the core wire to press into the outer skin, resulting in excessive poor crimping of the outer skin.

Consequences: directly affect the crimping of the conductor, causing the current to flow improperly or directly open the circuit.

2. Insufficient crimping of the skin

Bad cause: The crimping gesture is incorrect or the crimping speed is too fast, resulting in poor crimping.

Consequences: Because the crimping of the conductor and the insulation are insufficient, the tension of the terminal is insufficient, and it is easy to break during the use of the product, which directly affects the performance of the product.

3. Copper wire exposed

Bad cause: During the crimping process, the semi-finished copper wire is scattered, or the crimping method is improper.

Consequences: The exposed copper wire is easy to cause discharge, and it is easy to contact other terminals to cause short circuit. Due to the small number of copper wires in the crimping portion of the core wire, the tensile force of the terminal is indirectly affected, resulting in insufficient pulling force.

4. The outer skin of the foot is broken

Bad cause: When the mold is being debugged, the terminal is not in place, or the crimping blade is damaged.

Consequences: Directly affect the pull.

5. The apex is flattened

Bad cause: The position of the crimping position of the terminal and the position of the cutting blade of the mold are not adjusted, or the terminal is not stable.

Consequences: The terminal is difficult to match with the plug-in.

6. The back end is long

Bad cause: The position of the crimping position of the terminal and the position of the cutting blade of the mold are not adjusted, or the terminal is not stable.

Consequences: the long back end will cause the front end to be leveled, and the consequences are the same as the fifth point. In addition, the back end is easy to contact with other metal objects, causing short circuit and serious consequences.

7. The rear end has no bell mouth

Bad cause: The core crimping blade is not in place.

Consequences: The blade is easy to damage the core wire, so that the tension of the terminal will be too small, which will affect the service life of the terminal.

8. Bayonet distortion

Bad causes: poor raw materials, poor crimping, or hooking each other during product movement.

Consequences: The assembly is not tight and not in place, and the product is easy to fall off to the customer.

9. The terminal is upturned or bent down

Bad reason: mold debugging, the upper and lower molds are not well matched, or the die is stuck to the terminal.

Consequences: The assembly is poorly matched and the terminals are easily detached from the socket.

10. Coreless crimping

The cause of the defect: the coreless crimping caused by the short stripping head, generally occurs in the automatic crimping failure.

Consequences: Non-conducting, directly affecting the electrical conductivity of the product.

11. The front end core is too long

Bad cause: the peeling head is too long or the crimping gesture is incorrect.

Consequences: the core wire is too long to be short-circuited with the terminal on the side, and the protruding core wire tends to jack up the socket bayonet, causing insufficient assembly insertion and the wire is easily detached from the socket.

12. Distortion of contact parts

Bad cause: The terminal crimping die is damaged or the blade is misaligned.

Consequences: The assembly does not enter the socket during assembly. Even if it is inserted, there is no insertion force, which is common on the terminals of the VH-T.

13. Terminal stacking

Bad cause: When the continuous pressure machine is crimped, the wire moving speed and the crimping speed are not consistent.