锻压技术

盒形件分区变压边力拉深研究

英文标题：Research on box-drawing based on variable blank-holder force

作者：李琳陈忠家李奇刘志峰

单位：合肥工业大学

关键词：盒形件分区变压边力正交试验

分类号：TU 411.01

出版年,卷(期):页码：2016,41(2):25-29

摘要：

以盒形件为研究对象，根据盒形件受力情况将压边圈分区为圆角部分和直边部分。基于有限元模拟软件DYNAFORM，对盒形件进行拉深模拟分析，建立了评判成形质量的目标函数，采用正交试验的方法对变压边力拉深进行了研究。正交试验以拉深成形过程的5个位置：0，10，20，25和30 mm所对应的压边力值作为5个因素，进行五因素四水平的正交试验。与恒压边力加载的拉深相比，通过正交试验优化得到的“ 形”变压边力曲线进行数值模拟后，获得的综合指标为5.170，小于恒压边力加载模式的最小指标5.465，显著改善了盒形件的成形质量。试验验证的结果表明，随位置和行程变化的分区变压边力能有效控制起皱和拉裂等缺陷，从而提高盒形件的成形质量。

For the rectangular box, the blank-holder was segmented into the corner area and the straight side area based on the forces acting on it. The forming process of rectangular box was analyzed by DYNAFORM, and the objective function was established to evaluate the forming quality. Furthermore, the drawing process with variable blank-holder force was studied by orthogonal test. The five different positions 0，10，20，25 and 30 mm were selected in the drawing process, their BHF values were regarded as five factors of orthogonal test. The five-factor and four-level orthogonal test was carried out. The comprehensive index 5.170 is obtained by simulation on the blank-holder force curve optimized from orthogonal test, which is less than the minimum value 5.465 produced by constant BHF mode. The results of experiments show that partition VBHF changing with the position and process can effectively prevent the occurrence of wrinkling and fracture, and the forming quality of stainless steel rectangular box can be ensured.

基金项目：

国家自然科学基金资助项目（51135004）

李琳（1989-）, 女, 硕士研究生陈忠家（1972-）, 男，博士，教授

参考文献：

[1]李奇涵, 王红强, 刘海静，等. 基于BP神经网络矩形盒件拉深成形变压边力的预测[J]. 锻压技术，2015, 40(11): 27-31.Li Q H，Wang H Q，Liu H J，et al. Prediction of variable blank-holder force of rectangular box in deep drawing forming based on BP neural network[J]. Forging & Stamping Technology, 2015, 40(11): 27-31.

[2]陈炜, 周宏超, 徐雪来，等. 盒形件变压边力拉深成形研究[J]. 锻压技术，2014, 39(11): 20-23.Chen W, Zhou H C, Xu X L, et al. Research on variable blank holder force deep drawing for rectangular box parts[J]. Forging & Stamping Technology, 2014, 39(11): 20-23.

[3]Wang W R, Chen G L, Lin Z Q. Application of new VBHF optimization strategy to improve formability of automobile panels with aluminum alloy sheet [J]. Transaction of Nonferrous Metals Society of China, 2010, 20: 471-477.

[4]吴斌, 单云. 分块式压边圈盒形件成形数值模拟研究[J]. 锻压技术，2015, 40(9): 139-145.Wu B，Shan Y. Numerical simulation on the box-rectangular part forming by chunked blank holder[J]. Forging & Stamping Technology, 2015, 40(9): 139-145.

[5] Halil Ibrahim Demirci, Cemal Esner, Mustafa Yasar. Effect of the blank holder force on drawing of aluminum alloy square cup: Theoretical and experimental investigation [J]. Journal of Materials Processing Technology, 2008, 206: 152-160.

[6] 王武荣, 陈关龙, 林忠钦, 等. 板料成形中的新型可控压边力技术研究[J]. 塑性工程学报，2007, 14(1): 102-108.Wang W R, Chen G L, Lin Z Q, et al. A new strategy for the optimization of variable blank holder force in sheet metal forming [J]. Journal of Plasticity Engineering, 2007, 14(1): 102-108.

[7]赵洪梅. 铝合金冲压成形的变压边力技术研究[D]. 合肥：合肥工业大学，2013.Zhao H M. Research on VBHF Technology of Aluminum Alloy Stamping[D]. Hefei：Hefei University of Technology, 2013.

[8] 张渝, 丁波, 马军伟. 基于正交试验的热冲压冷却过程数值模拟分析[J]. 锻压技术, 2015, 40(3): 105-109.Zhang Y，Ding B，Ma J W. Numerical simulation of hot stamping cooling process based on orthogonal experiment [J]. Forging & Stamping Technology, 2015, 40(3): 105-109.

服务与反馈：

【文章下载】【加入收藏】