A method to suppress turning and distortion of precision metal stamping parts 'Hardware'

Methods to restrain the turning and distortion of precision metal stamping parts: 1. Reasonable mold design. In the progressive die, the arrangement of the blanking sequence may affect the forming accuracy of the stamping parts. For the blanking of small parts of stamping parts, generally a larger area of u200bu200bpunching is arranged first, and then a smaller area of u200bu200bpunching is arranged to reduce the impact of the punching force on the forming of precision metal stamping parts. 2. Hold down the material. Overcoming the traditional mold design structure, the discharge plate is opened with a material gap (that is, when the mold is closed, the discharge plate is attached to the concave mold, and the discharge plate and the concave mold where the material is contained-0.03, 0.05mm). In this way, the unloading plate moves smoothly during stamping, the gap is the material thickness t and the material can be compressed. The key forming part, the unloading plate must be made into a block-type structure to facilitate the solution of the wear (compression) loss of the pressing part of the unloading plate caused by long-term stamping, and the material cannot be compressed. 3. Add strong pressure function. That is to increase the size of the press part of the unloading insert (normal unloading insert thickness H+0.03mm) to increase the pressure on the material on the side of the die, so as to prevent the precision metal stamping parts from turning over and twisting during punching. Deformed. 4. The end of the punch edge is trimmed with a bevel or arc. This is an effective way to reduce cushioning power. By reducing the cushioning cutting force, the tensile force on the side material of the die can be reduced, thereby achieving the effect of suppressing the turning and distortion of the precision metal stamping parts. 5. In daily mold production, care should be taken to maintain the sharpness of punching convex and concave die cutting edges. When the punching edge is worn, the tensile stress on the material will increase, and the tendency of precision metal stamping parts to turn over and twist becomes greater. 6. Unreasonable or uneven blanking clearance is also the cause of turning and distortion of precision metal stamping parts, which needs to be overcome.