Wrinkling in stamping production will cause the scrap of SPA-H weathering steel sheet, which not only increases the manufacturing cost, but also causes the waste of raw materials, which needs to be analyzed and controlled. So what are the reasons for stamping and wrinkling of
SPA-H weathering steel sheet?
1. The blank holding force is not enough, and the gap of the blanking surface is not suitable for the problem of "inside loose and outside tight".
2. Too much lubricant or too frequent brushing, or improper brushing position.
3. The test SPA-H weather-resistant steel plate is too soft, the material strength is low, and the surface size is too small to hold the material.
4. The positioning of the SPA-H weathering steel plate is unstable, resulting in local inability to hold the material, and the shape of the pressing surface is improper, leading to uneven feeding.
5. Improper stamping direction.
Measures to control wrinkle of SPA-H steel sheet:
1. Check the state of wrinkling. When wrinkles occur uniformly around the workpiece, it should be judged that the pressing force is insufficient, and gradually increasing the pressing force can be eliminated. When drawing tapered and hemispherical pieces, increase the draw bar to increase the internal tensile stress of the plate inner diameter to eliminate wrinkles. Adopt the principle of "tightening inside and loosening" to eliminate the problem of "tightening inside and loose".
2. For lubricating oil, the brushing work should be performed in accordance with the requirements of the operating rules and regulations to ensure the correct amount of brushing and the location of the brushing to avoid wrinkling.
3. Without changing the requirements of the vehicle, change the material of the workpiece that is too soft to ensure the quality of the workpiece and avoid wrinkles.
4. Improve the positioning, and if necessary, add a pre-bending process to ensure that the blanks will not run away when the SPA-H weathering steel sheet is stamped. Modify the shape of the pressing surface to ensure the quality of the part and avoid the shape of the pressing surface from moving, which will cause uneven feeding.
5. For improper stamping direction, simulation software should be used to analyze the process of SPA-H weathering steel plate in the early stage of design to ensure its stamping direction. When the quality of SPA-H weathering steel plate is high, it is necessary to redevelop the mold and adjust the stamping direction .
