Prescribe the right medicine to solve the wrinkle problem of metal stamping parts

Wrinkling of metal stamping parts is a very common phenomenon in the stamping process of stamping parts. Wrinkling of stamping parts will affect the appearance and quality of the product, and it has not caused a waste of cost. Prescribe the right medicine to solve the wrinkle of metal stamping parts. Below we briefly describe the cause of the wrinkle and the corresponding solutions. The reasons for the wrinkling of metal stamping parts: 1. The positioning of the blank is unstable, which leads to the partial pressure of the material, the improper shape of the pressing surface, and the uneven feeding. 2. Insufficient blank holder force and improper blanking surface clearance will cause the problem of 'loose inside and tight outside'. 3. The test blank is too soft, the material strength is low, and the blank size is too small to hold the material. 4. Too much lubricating oil or brushing too frequently, or the brushing position is improper. 5. Improper direction of stamping parts. The solution to the wrinkling of metal stamping parts: 1. For the unstable positioning of the blank, we can improve the positioning and add a pre-bending process if necessary to ensure that the blank will not run off when the part is stamped. At the same time, the shape of the blanking surface can be modified to ensure the quality of metal stamping parts, and avoid the immobile shape of the blanking surface, resulting in uneven feeding. 2. Check the wrinkle status. If the wrinkles are evenly generated around the workpiece, it should be judged that the pressing force is insufficient, and gradually increase the pressing force to eliminate it. If the tapered parts and hemispherical parts are drawn, deepening ribs can be added to increase the tensile stress within the inner diameter of the plate to eliminate wrinkles. The principle of 'tightening inside and loosening outside' is adopted to eliminate the problem of 'tightening inside and loosening outside'. 3. Under the condition of not affecting the requirements of the whole vehicle, replace the parts with too soft blanks to ensure the quality of the parts and avoid wrinkles. 4. For lubricating oil, the oil should be brushed in accordance with the requirements of the operating rules and regulations to ensure that the amount and position of the brush are correct, and the number of brushing times is correct to avoid wrinkling. 5. For improper stamping direction, simulation software should be used to analyze the part process at the initial stage of design to ensure the stamping direction of the part. When the quality of the part is high, it is necessary to re-develop the mold and adjust the stamping direction. [Related recommendation] Learn more: What are the methods for polishing the surface of stainless steel? Learn more: Manufacturing characteristics of automotive stamping parts molds Learn more: Points to note in the design of continuous stamping dies