锻压技术

冲裁间隙对多层薄铜板成形的影响

英文标题：Influence of blanking clearance on forming of multi-layer thin copper plate

作者：盛亚栋樊瑜瑾蒋崇健

分类号：TG386.2

出版年,卷(期):页码：2020,45(3):27-36

摘要：

以单层0.3 mm厚的薄铜板叠6层进行冲裁，研究冲裁间隙对多层薄铜板成形的影响。对多层薄铜板在冲裁成形中的受力与应力状态进行分析，利用ABAQUS软件对多层薄铜板在不同冲裁间隙下的冲裁质量进行有限元仿真。研究表明:冲裁初期最大等效应力出现在凸凹模刃口处，导致最上层与最下层薄铜板先行断裂，中间层薄铜板受相邻层挤压，最大等效应力出现在软质凸凹模刃口处，最后出现在中间层薄铜板缩紧截面内；随着冲裁间隙的增加，各层薄铜板拉伸变形明显，导致冲孔直径增大、毛刺高度增加。前3层薄铜板的冲孔直径变化较为稳定，与凸模直径接近；后3层薄铜板的冲孔直径变化幅度较大，与各自凹模直径接近。最后，通过试验验证，冲裁精度符合国标要求，在实际生产过程中选择合理的、尽可能小的冲裁间隙能提高冲裁件的冲裁质量。

A six-layer thin copper plate with single layer thickness of 0.3 mm was blanked, and the influence of blanking clearance on the forming of multi-layer thin copper plate was studied. Then, the forces and stress conditions in the blanking process of multi-layer thin copper plate were analyzed, and the blanking quality of multi-layer thin copper plate under different blanking clearances was simulated by software ABAQUS. The research shows that the maximum equivalent stress at the beginning of blanking occurs at the edge of punch and die to cause the top and bottom thin copper plates to fracture first, and the middle thin copper plate is squeezed by the adjacent layer resulting in the maximum equivalent stress at the soft edge of punch and die. Finally, it appears in the contracted section of the middle thin copper plate. With the increasing of the blanking clearance, the tensile deformation of each thin copper plate is obvious, which leads to increase the punching diameter and the burr height. However, the change of punching diameter at the first three layers of thin copper plate is relatively stable, which is close to the size of the punch, and the change of punching diameter at the last three layers of thin copper plate is relatively large, which is close to the size of the respective die. In the end, through test verification, the blanking accuracy meets the requirements of national standards. In the actual production process, selecting a reasonable and as small blanking clearance as possible can improve the blanking quality of blanking part.

基金项目：

昆明理工大学分析测试基金（2017M20162103009）

盛亚栋（1993-），男，硕士研究生 E-mail：279004536@qq.com 通讯作者：樊瑜瑾（1962-），男，博士，教授，硕士研究生导师 E-mail：fanyujinkmust@163.com

参考文献：

［1］王尧，盛建华. 叠层母排的技术优势及其应用综述
［J］. 变频器世界，2012，(9): 55-60.

Wang Y，Sheng J H. Survey of advantages and applications for laminated bus bar technical
［J］. The World of Inverters，2012，(9):55-60.

［2］张伟. 叠层母排在合康高压变频器上的应用
［J］. 变频器世界，2016，(5): 40-45.

Zhang W. Laminated busbar applied in hekang medium voltage drives
［J］. The World of Inverters，2016，(5):40-45.

［3］Lambiase F，Durante M. Mechanical behavior of punched holes produced on thin glass fiber reinforced plastic laminates
［J］. Composite Structures，2017，173(7): 25-34.

［4］Tekiner Z，Nalbant M，Gurun H. An experimental study for the effect of different clearances on burr，smoothsheared and blanking force on aluminium sheet metal
［J］. Materials & Design,2006,27(10):1134-1138.

［5］Sapanathan T，Ibrahim R，Khoddam S，et al. Shear blanking test of a mechanically bonded aluminum/copper composite using experimental and numerical methods
［J］. Materials Science and Engineering: A，2015，623(4): 153-164.

［6］Wang X Z，Masood S H. Investigation of die radius arc profile on wear behaviour in sheet metal processing of advanced high strength steels
［J］. Materials and Design，2011，32(3): 1118-1128.

［7］岳学虎，樊瑜瑾，郑淮和，等. 冲裁过程中压边力对成形质量的影响
［J］. 锻压技术，2018,43(4):53-59.

Yue X H，Fan Y J，Zheng H H，et al. Influence of blank holder force on forming quality during blanking
［J］. Forging ＆ Stamping Technology，2018,43(4):53-59.

［8］吴小蓉，韩继龙. 冲裁间隙对铜板断面质量影响的有限元模拟
［J］. 机械研究与应用，2014，27(2): 87-88.

Wu X R，Han J L. Finite element simulation of blanking clearance effect on copper plate section quality
［J］. Mechanical Research & Application，2014，27(2):87-88.

［9］梁勇，樊瑜瑾，郑海涛，等. 叠层薄铜板冲裁质量及影响因素研究
［J］. 机械强度，2017，39(1): 47-52.

Liang Y，Fan Y J，Zheng H T，et al. Research of quality and influence factors in blanking laminated copper sheet
［J］. Journal of Mechanical Strength，2017，39(1):47-52.

［10］李兵，拾以超，章芳芳. 基于正交试验的板料预切冲裁断面质量优化
［J］. 锻压技术，2018，43(4):60-63.

Li B，Shi Y C，Zhang F F. Optimization on cross section quality of precut blanking based on orthogonal test
［J］. Forging ＆ Stamping Technology，2018，43(4):60-63.

［11］徐胜利. 冲裁间隙变化对冲裁件断面质量影响的力学分析
［J］. 锻压装备与制造技术，2017,52(4): 78-82.

Xu S L. Mechanical analysis of influence of blanking gap on the quality of cutting section
［J］. China Metalforming Equipment and Manufacturing Technology,2017,52(4):78-82.

［12］李鹏元，何伟，樊瑜瑾，等. 304不锈钢板冷冲及其冲裁质量研究
［J］. 材料科学与工艺，2018，26(2): 34-40.

Li P Y，He W，Fan Y J，et al. Investigation on coldblanking and blanked edge quality of 304 stainless steel sheet
［J］. Materials Science and Technology，2018，26(2):34-40.

［13］欧阳波仪. 模具间隙对黄铜薄板冲裁断面质量的影响研究
［J］. 模具制造，2018，18(7): 20-22.

Ou Yang B Y. Research on the effect of punching clearance on quality of cross section for brass sheet
［J］. Die & Mould Manufacture，2018，18(7):20-22.

［14］蒋崇健，樊瑜瑾，梁勇，等. 叠层母线冲裁机理及冲裁特性研究
［J］. 塑性工程学报，2018，25(4): 141-148.

Jiang C J，Fan Y J，Liang Y，et al. Research on blanking mechanism and blanking properties of laminated busbar
［J］. Journal of Plasticity Engineering，2018，25(4):141-148.

［15］GB/T 13914—2013，冲压件尺寸公差
［S］.

GB/T 13914—2013，Tolerance of dimensions for stamping parts
［S］.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】