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对在多工位级进模上连续变形过程中怎样减少弯曲回弹进行了研究,采用的冲压制件材料为EGC-QS镀锌冷轧板,零件上有2个90°折弯、2个折弯边上各有1个圆孔,要求2个圆孔保持同心,同时为了保证零件的冲压质量及尺寸精度,要求控制工件弯曲后的回弹量。针对该零件的结构特点,进行了10个工位排样设计,为了减少弯曲回弹在折弯处设计压线,在弯曲凹模上设计凸台校正结构来抑制回弹;在折弯前清理毛坯边缘毛刺以减少应力集中;采用分步弯曲成形以减少一次变形量。采用优化后的工艺和模具设计方案进行级进模试冲试验,试验结果表明,冲压件的成形效果良好且满足质量要求。
The research on how to reduce the bending rebound in the process of continuous deformation on the multi-position progressive die has been carried out. The stamping material used is EGC-QS galvanized cold-rolled plate, the part has two 90 ° bends and two Bend each have a round hole, requiring two round hole to maintain concentric, at the same time in order to ensure the quality of stamping parts and dimensional accuracy, the requirement to control the amount of rebound after bending the workpiece. Aiming at the structural features of the part, 10 station layout designs were carried out. In order to reduce the bending rebound, the pressure line was designed at the bend and the convexity correction structure was designed on the bend die to restrain the rebound. Blank edge burr to reduce stress concentration; the use of step bending forming to reduce the amount of a deformation. Using the optimized technology and the mold design scheme, the progressive die test punching test was carried out. The test results show that the forming effect of the punched parts is good and meets the quality requirements.