Analyze the metal terminal mold strip

Various abnormal strips of hardware terminal molds will appear during the establishment and proofing of the new module. What kind of analysis and maintenance countermeasures should we make for the strips in different situations? Analysis of metal stamping parts and metal terminal mold material tape 1: Do not damage the material tape when removing the mold. Both normal and abnormal lower molds are padded with skids to remove the molds. Normal lower molds should be shut down under continuous motion to remove the molds with pads. . 2: First, pass a complete strip. When the strip is stuck in the mold and cannot move, remove the mold and check the strip. (1) Check whether there is chip jumping in the mold and deform the material belt. (2) Check whether there is material blocking at the knife edge, and check whether the falling material hole is large enough. (3) Whether the positions that should be formed or blanked are punched out. (4) Whether the spare parts are sufficient. Check whether the part itself has not given way enough (or has not given way) or the formed position is not formed in place. (5) Whether the blanking has burrs. (6) Whether the guide needle is pulling material. It is because the straight section of the guide pin is too long (usually one material thickness is exposed on the mold surface) and the gap between the guide pin and the circular hole is small (usually 0.005-0.01MM on one side) (7) Use a microscope to see the pressure damage and mold impression ( Both the product and the waste belt should be seen). Because there are mold prints on the scrap tape, a scimitar of the tape will be generated, which will cause the material to go unsmoothly. (8) Check whether there is dust and jumping chips at the cutting edge of the chip. Second, the countermeasures of hardware terminal mold repairing 1. After the complete material strip is out, trim the size. (1) First check all the dimensions against the product drawing. Mark all the NG places. (2) Blanking size NG, check whether there is a chamfer in the NG size (the chamfer size will affect the size of the size), whether the knife edge punch is worn or chipped, resulting in burrs. Whether the blanking is turned over, (the insert is not pressed enough, the knife edge punch is worn, and the gap between the knife edge and the punch is not good, which will cause the material to turn). It also affects the deflection and offset. Compensation for blanking is not calculated well during design. (If the blanking can be shifted, move the blanking. If the shifting will affect other dimensions, change the part), (3) Forming size NG, bending angle NG, generally the two-bend forming angle is 45 degrees and The staggered distance of the 90-degree bending point is wrong (the farther the distance, the smaller the angle, the closer the distance is, the larger the angle), the 45-degree bending position needs to be adjusted. The height of the forming bending mold also affects the angle. The downward forming angle adds or subtracts the upper mold parts, and the lower mold can grind the ribs. The upper mold can grind the convex ribs by adding or subtracting the lower mold parts to the upward forming bending mold. (The range of addition and subtraction is within plus or minus 0.02MM) The inner R of the forming bending die will also affect the angle, the smaller the R, the smaller the angle, the more material will be used, the larger the R, the greater the angle, the less material will be used, so it will Affect the bending length. Negative angle of 90 bending mold will affect the angle, under normal circumstances, it should be negative 5-10 degrees, try to keep it open, and it can be made into a right angle under special circumstances. Bending die drawing material will affect the angle, bending die drawing material is the straight face of the bending die is too long (usually 0.05-0.1MM). The floating block pressing position is far away from the forming surface (usually at the position where the R angle and the straight surface meet), and the floating block spring is not strong enough (usually green, orange, special coffee gray) Bending size NG Bending size and 90 bend Die correlation, (usually adjust the position of 90 bending die to adjust the size). Generally convex hull, puncture, add or subtract as much as the difference. The size that can be adjusted by the adjusting rod should be adjusted to the state that can be adjusted. When adjusting, the mold should be hit to the bottom dead center position to prevent the parts from being damaged by over-adjusting. If the adjusting rod has a limit device, do not forcefully adjust it inward after it cannot be adjusted, as the adjusting rod will be broken. 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