Irreversible Defects In Cold-pressed Needle Crimping

contact crimper Plastic deformation is applied to the metal terminal through a mold to form a cold solder contact with the wire. Once this process is complete, the internal grain structure and stress distribution of the terminal are solidified and cannot be repaired by secondary crimping. When the pressure sensor in d sub contact crimper shows an abnormal value, it means that the terminal compression deviates from the design value. Insufficient pressure will cause the contact resistance to exceed 50 milliohms, while overpressure will cause the terminal wall thickness to decrease below the critical value, and the tensile strength will decrease by more than 30%.

Continuing to use fault condition contact crimping tool will result in dozens or even hundreds of defective crimping points in a short period of time. These defective products, once mixed into normal batches, need to be screened one by one through tensile testing and resistance measurement, and the detection cost is far higher than the downtime loss. Wear or misalignment of the mold causing the crimping position to shift can cause the insulation layer to be pressed into the conductor contact area, forming a hidden fault point that only becomes apparent as poor contact after the equipment has been running for several months.