What are the inspection standards for metal stamping parts?1

The inspection standards of metal stamping parts: 1. The parts inspection guide (standard) book Some simple metal stamping parts can be inspected by comparing the various sizes marked in the drawings, followed by the use of various measuring instruments, such as tape measure, caliper, Through stop regulations and so on. In addition, pay attention to some important tolerances marked on the drawing, and whether the tolerance range is consistent with the drawing. For some high-precision products, tolerance requirements must be strict. 2. Samples of metal stamping parts For some parts without inspection tools, but with more complicated shapes that cannot be expressed by two-dimensional drawings. You can use a quadratic circle to check. The sign board is the most intuitive reference, you can see whether the structure is qualified, the surface treatment, and the batch front. 3. Excellent metal stamping materials The adaptability of metal stamping materials to the stamping process becomes the stamping performance of the sheet metal, which includes: crack resistance, mold-fitting and shape-setting properties. 1) Fracture resistance refers to the ability of stamping materials to resist rupture, which is generally measured by parameters such as forming limit; 2) Mouldability refers to the ability of the sheet metal to achieve consistency with the shape of the mold during stamping; 3) Formability It refers to the ability of the part to maintain its existing shape in the mold after it is demolded. Obviously, the larger the forming limit, the better the fit and shapeability, the better the stamping performance of the material. 4. Special inspection tools for metal stamping parts The special inspection tools for metal stamping parts should be based on the actual conditions of the parts and need to be used skillfully. The above are the inspection standards for metal stamping parts. These are only for the first-time inspection. Some aspects are not expressed on the drawings, but we still need to continue to summarize in practice.