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经笔者对薄板弯曲成形凸模横截面形状的长期探索,终于找到了一种理想形状(图1)。这对从事冷冲模设计工作者特别是刚从事这方面工作的同志会有一定的启示。以90°弯曲成形为例。薄板弯曲成形,特别是冷轧薄板,因材料的回跳因素,往往达不到所要求的形状。故在设计凸模时有意将凸模垂直边内倾2°左右(图2),以补偿因回跳引起的误差。但从尺寸精度考虑可发现,因冲压次数的不断增加,凸模磨损日益加剧,圆角半径
After the author of the bending plate bending cross-sectional shape of the long-term exploration, and finally found a perfect shape (Figure 1). This is engaged in cold die design workers, especially those just engaged in this work will have some inspiration. For example, bending at 90 °. Sheet bending, especially cold-rolled sheet, due to the material back-jumping factors, often can not reach the desired shape. Therefore, when designing the punch, the vertical edge of the punch is intentionally tilted about 2 ° (Figure 2) to compensate for the error caused by the bounce. However, considering the dimensional accuracy can be found, due to the increasing number of stamping, punch wear is increasing, fillet radius