Handling of common problems in stamping parts

Stamping parts rely on presses and mold shells to release external forces on plates, amorphous strips, pipe fittings and aluminum profiles, causing them to be plastically deformed or separated, and then to obtain the desired appearance and specifications of the product workpiece (stamping parts) Forming production and processing methods. Stamping die and forging are both plastic deformation production processing (or working pressure production processing), collectively referred to as casting. The blanks of the stamping die are mainly hot-rolled and cold-rolled thick steel plates and nylon belts. Difficult problem solving 1. Adhesion, scratches: due to the friction between the raw material and the mold base or cavity, the product or the surface layer of the mold is poor; 2. Burrs: the key is generated in the cutting die and blanking die, between the cutting edges When the gap is undulating, it will produce burrs; 3. Line deviation: When the product is formed, the part that first touches the mold is extruded and formed and a line is produced; 4. Concave and convex: The uncoiling beneficial line has dirty things (iron (Pin, rubber, dust) infiltrate and cause bumps; 5. Bumps: uneven ground stress, poor drawbead pairing, or poor control of the press guide rail slider, etc., cause bumps at the corners or embossed parts of the product. , Strain force; 6, wrinkles: due to poor adjustment of the press guide rail slider, low precision of the press, unsuitable adjustment of the working pressure of the air cushion cc, large punching needles or large r parts, etc., the edges or r parts wrinkle. 7. Other practical problems: In daily production and manufacturing, the size of the punching machine will be slightly larger or smaller (may exceed the specifications and model regulations) and the distance between the specifications of the mold base and the large size of the punching machine will be large. , In addition to the design plan specifications of the cavity, processing accuracy and cold stamping voids, it is also necessary to consider the following aspects to deal with. ⑴. When the shearing edge is damaged, the tensile stress of the raw material will expand, and the stamping parts will cause the turning and distortion of the material tend to increase. When the material is turned over, the size of the punching machine will become smaller. ⑵. The air brake on the raw material will cause plastic deformation of the raw material, which will cause the size of the punching machine to become larger. When the air brake is relieved, the size of the punching machine will become smaller. ⑶. The shape of the top of the die base. If the top is trimmed into a slope or arc, the punching parts are not easy to turn over or distort because the cold punching pressure is relieved. Therefore, the punching machine specifications will become larger. When the top of the die base is a plan view (no slope or arc), the relative specifications of the punching machine will become smaller. 8. Ways to restrain stamping parts from turning over and distorting ⑴. Effective stamping die. In the stamping die, the distribution of the blanking sequence may endanger the precision of stamping forming. For the blanking of the fine parts of the stamping parts, generally the shearing blanks with a large total area are distributed first, and then the shearing blanks with a smaller total area are allocated to alleviate the damage of the punching force to the forming of the stamping parts. ⑵. Pressing raw materials. Get rid of the traditional stamping die structure, and give a gap for the material on the pour plate (that is, when the mold is closed, the raw material can be clamped. The important forming part, the pour plate must be made into a block structure, so as to Conveniently deal with the wear (pressure) loss caused by the pressing part of the pour plate caused by the long-term stamping die, and the raw material cannot be clamped. ⑶. The air-break brake is added. That is, the thickening specification of the unloading part of the pour insert ( All normal pour inserts have a thickness of H+0.03mm) to increase the working pressure on the raw materials on the cavity side, thereby preventing the stamping parts from turning over and distortion during shearing. ⑷.The top of the die base is trimmed into a slope or arc. It is a reasonable way to alleviate the punching force. Relieving the cold punching pressure can alleviate the pulling force on the raw materials on the cavity side, and then achieve the actual effect of suppressing the turning and distortion of the stamping parts. ⑸. In daily mold processing, Attention should be paid to the sharpness of the cutting edge and the cutting edge of the cavity. When the cutting edge is damaged, the tensile stress on the raw material will expand, and the stamping parts will cause turning and distortion of the material tend to increase. ⑹. Cold stamping gap Unscientific or uneven gaps are also the cause of stamping parts flipping and distortion, which need to be overcome. Related news: the characteristics of the main materials of stamping parts, the characteristics of scaffolding stamping parts and the importance of inspection, the advantages of metal stamping parts introduce the advantages and advantages of stamping parts Process and characteristics of stamping parts