锻压技术

圆钢管无凹模冲孔的凸模结构优化设计

英文标题：Optimization design of punch structure for round steel pipe without die in piercing

作者：朱超覃才友

单位：四川工程职业技术学院

分类号：TG385.2

出版年,卷(期):页码：2015,40(3):74-77

摘要：

针对钢管无凹模冲孔工艺中的平凸模、尖凸模等传统凸模结构无法解决的凹坑、塌陷量大等缺陷，提出一种新型螺旋型凸模结构。通过有限元模拟分析，研究了螺旋型凸模中上刃角β与下刃角α对冲裁力和冲裁质量的影响规律。采用正交试验设计研究螺旋型凸模中上刃角β和下刃角α的匹配关系，优化后的凸模结构参数为上刃角β为45°和下刃角α为40°。采用优化后的凸模结构参数进行模具设计，在可倾开式压力机上进行冲压试验，钢管冲孔的凹坑小、毛刺小，冲孔成形质量满足要求，试验结果与模拟结果一致。

For the deformation defects of scallops and large scale of collapses produced in the traditional flat and sharp punch during non-die piercing process, a new spiral punch structure was presented. The influences of upper blade angle β and lower blade angle α of spiral punch on punching force and punching quality were studied by finite element simulation analysis. Moreover, the relationship between upper blade angle β and lower blade angle α of spiral punch was researched based on orthogonal experimental design. Finally，the optimal parameters of punch structure were obtained，namely the upper blade angle is 45° and the lower blade angle is 40°. The die structure was designed by the optimized punch structure parameters, and the stamping tests were carried out by tilting open press. With only a little concave and burr, the piercing quality met production requirements. The test result is consistent with the simulation result.

基金项目：

朱超（1969-），男，硕士，副教授

参考文献：

［1］赵仁峰,赵升吨,景飞,等. 厚壁管精密下料新工艺的实验研究[J]. 锻压技术,2014,39（8）:105-108.Zhao Ｒ F，Zhao S D，Jing F，et al. Experimental study of new precision blanking technology for thick-wall tubes[J]. Forging & Stamping Technology,2014,39（8）:105-108.
［2］江秉华, 刘渝. 管形零件冲孔过程的变形研究[J].锻压技术,2007,32（5）:148-151.Jiang B H, Liu Y. Deformation study of piercing on tubular parts[J]. Forging & Stamping Technology, 2007,32（5）:148-151.
［3］郭钊，唐文亭，曹立勋. 圆管异形孔冲裁工艺设计及有限元模拟[J].锻压技术, 2014,39（8）:140-146.Guo Z, Tang W T, Cao L X. Process design and numerical simulation on shaped hole blanking of steel round pipe[J]. Forging & Stamping Technology, 2014,39（8）:140-146.
［4］彭成允,谭文娟,龚小涛.管材无凹模冲孔工艺与模具设计[J].模具工业,2006,32（12）:22-24.Peng C Y, Tan W J, Gong X T. No female die piercing technology and design of die for pipe[J]. Die & Mould Industry,2006,32（12）:22-24.
［5］魏公际,龚小涛,彭成允,等.管材无凹模冲孔变形机理分析与有限元模拟[J].模具工业,2008,34（10）:36-38.Wei G J, Gong X T, Peng C Y, et al. Deformation mechanism analysis and finite-element simulation on punching of pipe free of cavity die[J]. Die & Mould Industry, 2008,34（10）:36-38.
［6］王华君,田梦芸,杜建忠,等.凸模结构对厚壁管件无凹模冲孔塌陷的影响研究[J].锻压装备与制造技术,2013,48（2）:84-86.Wang H J, Tian M Y, Du J Z, et al. Effect study of punch strcuture in dimple of no female-die punching for thick-wall tube[J]. China Metalforming Equipment & Manufacturing Technology,2013,48（2）:84-86.
［7］蒲思洪,温彤,吴维,等.韧性断裂准则与阀值选取的理论及试验研究[J].热加工工艺,2009,38（3）:18-21.Pu S H, Wen T, Wu W, et al. Theoretical and experimental research on choosing criterion and critical value of ductile fracture[J]. Hot Working Technology, 2009,38（3）:18-21.
［8］张如华,熊勇勇,王师,等. 孔径比为2.50～3.00的自由锻冲孔坯料形状研究[J]. 锻压技术,2013,38（1）:164-167.Zhang R H, Xiong Y Y, Wang S, et al. Billet shape research of open punching with aperture ratio from 2.50 to 3.00[J]. Forging & Stamping Technology, 2013,38（1）:164-167.

服务与反馈：

【文章下载】【加入收藏】