Causes of poor contact of crimp terminals

Whether there is a problem with the installation and adjustment of the equipment will directly affect the quality of the terminal crimping. For example: whether the mold is loose, whether the terminals are in place, whether there are impurities in the mold, etc. In addition, the placement of employee gestures and wrong gestures can also cause all kinds of bad products. The following are examples of various crimping gestures and poor crimping: 1. Excessive sheath crimping Cause: Incorrect crimping gesture or improper adjustment of the spacer causes the core wire crimping position to be pressed into the wire sheath, resulting in excessive compression of the wire sheath pick up (deep draw). Consequences: directly related to the crimping of the conductor, resulting in poor current or direct short circuit. 2. Insufficient crimping of the outer skin Reason: The crimping gesture is incorrect or the crimping speed is too fast, resulting in poor crimping. Consequences: Due to insufficient crimping of conductors and insulating parts and insufficient terminal tension, it is easy to break during product use, which is directly related to product performance. 3. Reason for core wire exposure: During the crimping process, the core wire of the wire is scattered, or the crimping method is improper. Results: 1. The exposed copper wire is easy to cause leakage, and it is also easy to touch other terminals, resulting in a short circuit. 2. Due to the lack of copper wire in the crimping position of the core wire, the tension of the terminal is indirectly affected, resulting in insufficient tension. 4. Deformation of the insulation pressure part (cover) Reason: When adjusting the mold, the terminal is not in place or the crimping blade is damaged. Consequences: bad appearance, directly related to pulling force. 5. Reasons for deformation of accessories: improper adjustment of terminal crimping position and die-cutting machine position, or unstable terminal feeding claw. Consequences: Terminals and inserts are difficult to match, affecting insertion force. 6. Copper chips stay for too long Reason: The terminal crimping position and the mold disconnection position are not adjusted well, or the terminal feeding claw/feeder is unstable. Consequences: The rear end is too long and the front is flat, consequences and consequences, no. In addition, the back end length is prone to contact with other metals, resulting in short circuits. 7. No bell mouth at the rear Reason: The core wire crimping blade is not adjusted correctly. Consequences: Blades are prone to damage to the core wire, and embossing/breaking will occur, affecting the pull and life of the terminal. 8. Reasons for deformation of terminal interface (barb): poor raw materials, poor curling, or mutual hooking and pulling during the movement of goods. Consequences: the installation is not tight, not in place, and the goods are easy to fall into the hands of customers. 9. Terminal flip. Causes of terminal bending: mold adjustment, poor matching of upper and lower molds, or blade sticking to the terminal. (The curvature is generally 15 degrees up and down. It may be) Consequences: poor installation and coordination, and the terminals tend to fall off the housing. 10. Reasons for coreless crimping: The knife value is too small or the blade is not installed when stripping the wire, and the wire is bent, which … nerves occur in automatic crimping. Consequences: non-conductive, directly related to the conductivity of the product. 11. The front core wire is too long Reason: the peeling is too long, or the crimping gesture is incorrect. Results: 1. If the core wire is too long, it is easy to contact with the edge terminal, resulting in a short circuit. 2. The protruding core wire is easy to push up the socket interface, resulting in insufficient installation and insertion, and the wire is easy to fall off the socket. 12. The reason for the deformation of the touch position: the terminal crimping blade is damaged or the blade is displaced, or the items are pressed against each other during the movement. Consequences: The components cannot be inserted into the socket during the installation process, and there is no blocking force even if inserted, generally on the VH-T terminal in the socket.


Post time: Aug-13-2022