Cause analysis and treatment method of product wrinkles in the production process of stamping factory-hardware

In the process of producing stamping parts in the stamping processing plant, excessive tangential stress on the peripheral edge of the product causes the material to lose stability, causing the product to form uneven wrinkles along the edge tangential direction, which is called stamping part wrinkles. When the wrinkling is severe, it will also make it difficult for the material to pass through the gap between the concave die and the convex die during the stretching process, increase the tensile deformation force, and may also lead to cracks. The occurrence of instability depends not only on the size of the tangential stress at the edge of the material, but also on the thickness of the stretched part. Generally speaking, it is better to use nitrogen gas spring or Uniglue for drawing molds, and it is less prone to wrinkles and cracks. why? Because the force of the nitrogen gas spring or UniGlue is generally more balanced, there will be no problem of uneven force. Youligu will shrink when it is used for a long time, and its strength will not be as great as before. You must replace it with a new one, but its price is much cheaper than that of a nitrogen gas spring. Blanking rings can be used to prevent wrinkles. In some places they are called blanking beads. They all mean the same thing, that is, putting a circle of raised beads around the material without affecting the subsequent processes of the product, commonly known as blanking beads. , Press the material around, the advantage of this is that the stretched product will be fuller and can also prevent wrinkles. The blank holder force needs to be adjusted relatively during the mold trial. Generally, the design is not so reasonable, and the height of the blank holder needs to be adjusted appropriately according to the output product. If the blank holder force is too large, the friction between the material, the die and the blank holder will increase, and the wall of the material will become thinner, or even crack; if the blank holder force is too small, it will not be able to effectively prevent wrinkles. . Hardware, the precision of the hairline of the produced products, the natural surface of the stamping parts, 16 quality inspection procedures to escort the quality. Is your trusted partner when choosing a stamping factory!