锻压技术

左支架多工位级进模的设计

英文标题：Design on multi-position progressive die for left bracket

作者：武晓红

分类号：TG76

出版年,卷(期):页码：2022,47(12):189-192

摘要：

为了解决成形高度大且含有密集的局部成形的制品在成形时的材料开裂问题，采用了预成形、预冲孔、再成形，最后整形的多次成形方法。成形结果表明,局部成形高度可达材料厚度的8倍，制品在生产中没有出现开裂现象，产品质量稳定。为了解决小凸模易折断的问题，采用了护套固定小凸模的结构，明显提高了小凸模的寿命。为了解决弯曲回弹问题，采用了减少弯曲凸模与材料接触面积的凸模结构,该结构可增大弯曲区的压应力，达到减少弯曲回弹的目的。左支架级进模成形的工件完全符合产品的质量要求，模具的维修率低。该模具的成功投产表明：采用预冲孔和多次成形相结合的措施，能够有效地提高带孔凸包的成形高度，防止材料开裂。

In order to solve the problem of material cracking in the forming process for the products with high forming height and dense local forming, the multiple forming method of pre-forming, pre-punching, re-forming and final shaping was adopted. The forming results show that the local forming height is eight times the thickness of material, there is no cracking in the production of product, and the product quality is stability. In order to solve the problem that the small punch is easy to break, a structure in which the small punch is fixed by a sheath is adopted, and as a result, the service life of the small punch is obviously increased. In order to solve the bending springback problem, the punch structure that reduces the contact area between bending punch and material is adopted, which increases the compressive stress in the bending zone and reduces the bending springback. The workpiece formed by the progressive die of left bracket fully meets the product quality requirements, and the die maintenance rate is low. The successful operation of the die shows that the combination of pre-punching and multiple forming can effectively improve the forming height of the convex hull with holes and prevent the material from cracking.

基金项目：

广东海信宽带科技有限公司特派员工作站（20210425001187）

武晓红（1964-），男，学士，高级工程师 E-mail：wxh403@163.com

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