Hardware Explains the drawing processing of precision stamping parts

As one of the main stamping processes, precision stamping parts drawing is very widely used. Various thin-walled parts with cylindrical, rectangular, stepped, spherical, conical, parabolic and other irregular shapes can be made by the stretching process. 1. Hemispherical drawing processing of precision stamping parts with flange: When the spherical part is drawn, the blank is in partial contact with the spherical top of the punch, and most of the rest are in a suspended and unconstrained free state. Therefore, the main process problem of this kind of spherical part stretching is the serious thinning of the local contact part, or the instability and wrinkling of the curved part. 2. Flange drawing processing of precision stamping parts: the flange part of the drawn product is subjected to shallow drawing processing. The stress and strain situation is similar to compression flanging. Due to the tangential compressive stress, it is easy to wrinkle, so the forming limit is mainly limited by the compression wrinkle. 3. Edge drawing processing of precision stamping parts: perform angular re-drawing processing on the flange part of the previous drawing product. This processing requires the material to have good plasticity. 4. Deep drawing processing of precision stamping parts: drawing processing products that exceed the drawing processing limit can be completed after more than two times of multiple drawing. The products that have been stretched in the depth direction of the front station are re-stretched in the depth direction. The wide flange stretch piece is stretched to the required flange diameter when it is first stretched, and when it is stretched later, the flange diameter remains unchanged.