Terminal machine crimping harness defective phenomena and solutions

Terminal crimping is an important process in the processing of wiring harnesses, in the industry as a whole, the processing of this process is relatively high in the case of defective. Only to improve the yield of terminal crimping operations, can significantly increase the capacity of wire harness processing, enhance the efficiency and quality of wire harness processing. So what are the reasons for the automatic terminal machine failure crimp terminal bad?

Listed below are the main defective terminal crimping operations, and analyze the common causes of defective phenomena: First, the terminal distortion and deformation of bad manifestations: 1. terminal lateral bending deformation phenomenon; 2. terminal axial distortion and deformation phenomenon. Reasons for failure: 1. terminals are not in the center of the lower blade and the occurrence of the left / right tilt; 2. mold of the terminal shifter to transport terminals to hit the end of the position, the shifter's spring tension is too weak or too strong in the case of the terminals can not be transferred to the flat top of the head of the l positive position, the occurrence of the case of failure to arrive at or exceeded; 3. end of the blades (Crimper / Anvil) wear and tear of the situation will occur Failure of terminal bending is caused by misalignment of the centers of the crimper and the lower blade. In addition to this will also lead to blade wear, so that the pressure marks too deep; 5. Due to wear and tear of the position adjustment wire caused by the terminals sent not in place caused by the bad. Second, the wire harness is not assembled in place bad form: 1. deep hit: press the core area pressed to the wire skin; 2. deep hit: the core length is too long, resulting in deformation of the terminals; 3. shallow hit: the outer skin or the core is not pressed to the specified area; bad cause: 1. core stripping length is too long or too short; 2. crimp is the wire is incorrectly placed in the position. Third, the trumpet bad bad reason: 1. Terminal and crimper position error trumpet is not formed or formed too large; 2. Flat top of the head than STRIP Guide Plate more backward, into the terminal offset transmission bad phenomenon occurs; Fourth, cut off the mouth of the bad bad reason: 1. Terminal cut off the Department is not in the right position, more prominent or more to the inside of the situation of the bad phenomenon. Cut off bad performance in the cut off too long or too short, cut off the surface of the oblique, scratching, cut off the surface bending. When the cutoff is too long, it will lead to the box not being inserted in place and the box will be hung up. Too short to lead to injury to the terminal; 2. Terminal cut off the cut-off section will appear rough bad phenomenon causes: ① cut off the surface is worn ② insulation flat top end wear ③ cut off the surface and flat top of the head of the case of the gap five, the terminal Yang & Terminal Hook bad manifestations: 1. Terminal Hook refers to the phenomenon of upward bending of the front end of the terminals when playing the end of the terminals; 2. Terminal Yang is to play the end of the terminals when the front end of the terminals bending phenomena downward. Bad reason: 1. terminal is not in the flat top head of the positive position; 2. flat top head and support platform is not in the right position; six, the core wire loose bad form: all the cores are not completely closed in the crimp area; bad reason: cable stripping off the insulation layer of the processing or the process of bundling, the core wire loose, can be improved through the process control and the use of semi-stripped wire; seven, the skinned area of the bad form of manifestation: 1. outside the knife locking piercing Insulation; 2. outside the knife lock mouth did not fully embrace the wire; 3. lock mouth on both sides of the asymmetry; bad reason: 1, knife mismatch; 2, adjust the crimping height; eight, the transmission distance (Feeding) caused by bad Feeding distance refers to in order to hit the end of the next terminal slot in order to move away from the form and reason: 1. grips are not in place resulting in poor transmission 2. grips are worn out resulting in poor transmission; nine, pull the skin area of the bad expression: 1. Transmission bad; nine, pulling force NG bad form: after crimping, pulling force test NG (excluding mold factors) bad treatment: adjust the crimp height 1.General mold adjustment crimp height method 2.Cam type mold adjustment crimp height method

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