锻压技术

电机端盖HC260高强钢冲压工艺优化

英文标题：Stamping process optimization of HC260 high-strength steel for motor cover

作者：张勋1 2 李国林2 柳玉起1 林滔2 张镇2

单位：（1.华中科技大学材料科学与工程学院湖北武汉 430074 2. 美的集团智能制造研究院广东佛山 528311)

分类号：TG386

出版年,卷(期):页码：2023,48(6):22-28

摘要：

为了将电机端盖用材料由厚度为1.0 mm的DC54热镀锌材替换为厚度为0.8 mm的HC260高强钢，提出了一种新的冲压工艺方案。首先，通过FASTAMP模拟和实验对常用的3工序成形工艺方案进行验证，结果显示，产品在中心反拉凸包位置发生严重破裂。其次，通过冲压成形理论分析了破裂原因并制定了新的冲压工艺方案，即在OP10拉深工序前增加OP05预拉深工序，并增大OP10拉深的工序的凸凹模间隙，使中心反拉区域断面线长增大，使其与产品型面的比值>0.9，确保在后续成形中反拉区域有足够的材料。再次采用FASTAMP冲压成形全工序数值模拟方法对新的4工序成形工艺方案进行验证，结果显示，新的4工序成形工艺方案解决了零件的破裂问题，最大减薄率为27%。最后，根据新的4工序成形工艺方案制作了新模具并进行了试模验证，现场1次试模成功，证明了FASTAMP软件全工序数值模拟的有效性与准确性。

For the motor end cover meterial, a new stamping process was proposed to replace DC54 hot-dip galvanized material of 1.0 mm with HC260 high-strength steel of 0.8 mm. Firstly, the existing 3-step forming process scheme was verified by FASTAMP numerical simulation and experiment, and the result shows that the product is serious cracked at the center of reverse pull convex hull. Secondly, the reason for rupture was analyzed through the stamping forming theory, and the new stamping process plan was formulated, that is, the OP05 pre-drawing process was added before the existing OP10 drawing process. Furthermore, the gap between punch and die of OP10 drawing process was increased to increase the section line length at the central reverse drawing area, which leaded to the ratio between it and product profile over 0.9, so as to ensure that there was enough material at the reverse drawing area to deform in the subsequent forming. Thirdly,the new 4-step forming process scheme was verified by using FASTAMP numerical simulation method for the whole process of stamping. The results show that the new 4-step forming process scheme solves the cracking problem of parts, and the maximum thinning rate is 27%. Finally, according to the new 4-step forming process scheme, a new die was made and tested for verification. The results show that the die is successfully tested once on site, which proves the validity and accuracy of the numerical simulation for the whole process by software FASTAMP.

基金项目：

广东省重点领域研发计划项目（2021B0101220001）

张勋（1991-），男，博士研究生

参考文献：

［1］康俊远. 电机端盖冲压工艺分析与级进模设计
［J］. 模具工业，2007，33(3)：34-38.

Kang J Y. Technological analysis and design of progressive die for stamping of cover
［J］. Mold Industry，2007，33(3)：34-38.

［2］周建明，付延宜．冷轧板汽车冲压件开裂和裂纹缺陷的原因及预防
［J］．南方金属，2019，231(6): 39-41.

Zhou J M，Fu Y Y.Defects in cold rolled automobile stamping parts
［J］．Southern Metals，2019，231(6):39-41.

［3］李晓达，占向辉，张向奎，等. KMAS 冲压仿真在压力锅盖工艺优化中的应用
［J］. 机械设计与制造，2012，262(12): 74-76.

Li X D，Zhan X H，Zhang X K，et al. The application of KMAS punching simulation in optimization design of pressure cooker
［J］. Machinery Design & Manufacture，2012，262(12): 74-76.

［4］易国锋，李巧敏，钟文，等. 基于应变梯度塑性理论的纪念币压印成形数值模拟
［J］.中国机械工程，2018，29(6)：1369-1374.

Yi G F，Li Q M，Zhong W，et al. Coining simulation of commemorative coins based on strain gradient plasticity theory
［J］. China Mechanical Engineering，2018, 29(6)：1369-1374.

［5］韩龙帅，王刚，郑学斌，等．基于Autoform 的门内板冲压仿真分析
［J］.塑性工程学报，2021，28 (4): 82-88．

Han L S，Wang G，Zheng X B，et al. Simulation analysis of door inner panel stamping based on Autoform
［J］.Journal of Plasticity Engineering，2021，28 (4): 82-88.

［6］张翔，皇甫兆阳，孙庆东，等. 基于Fastamp 和正交试验的汽车门框冲压工艺参数优化
［J］. 锻压技术，2021，46(1):70-75.

Zhang X，Huangfu Z Y，Sun Q D，et，al. Optimization on stamping process parameters of automobile door frame based on Fastamp and orthogonal test
［J］. Forming & Stamping Technology，2021，46(1)，70-75.

［7］Bao X J，He D N，Lyu D，et al．Optimization of autobody panel stamping process based on dynamic explicit finite element method
［J］. Acta Metallurgica Sinica，2000，113(1)：387393.

［8］GB/T 15825.1—2008，金属薄板成形性能与试验方法第1部分：成形性能和指标
［S］．

GB/T 15825.1—2008, Sheet metal formability and test methods—Part 1: Formability and indexes
［S］.

［9］王苏静，邓沛然，宣守强，等. 7005高强铝合金胀形性能
［J］. 塑性工程学报，2022,29（1）：73-78.

Wang S J, Deng P R, Xuan S Q, et al. Expansion performance of 7005 high-strength aluminum alloy
［J］. Journal of Plasticity Engineering, 2022, 29（1）：73-78.

［10］解后循, 张敏中, 贾海斌. 材料结构参数对薄板冲压成形仿真结果的影响
［J］. 金属成形工艺，2003，21（2）: 16-18.

Xie H X, Zhang M Z, Jia H B. Study on sensitivity of material constitutive parameters
［J］. Metal Forming Technology, 2003，21（2）: 16-18.

［11］包向军，蒋宏范，何丹农，等. 材料参数对汽车覆盖件冲压成形性能影响的数值模拟
［J］. 机械工程材料，2001,25(7)：15-17.

Bao X J，Jiang H F，He D N，et al. Numerical simulation of the influence of material parameters on autobody panel stamping formability
［J］. Material for Mechanical Engineering，2001,25(7)：15-17.

［12］郭斌，郎利辉. 锻压手册：第2卷冲压
［M］. 北京:机械工业出版社，2021.

Guo B, Lang L H. Forging Manual: The Second Volume Stamping
［M］. Beijing: China Machine Press, 2021.

［13］蒋磊，马培兵，王龙，等. 翼子板成形数值模拟与工艺优化
［J］. 锻压技术，2021,46(11):113-123.

Jiang L, Ma P B, Wang L, et al. Numerical simulation and process optimization on fender forming
［J］. Forming & Stamping Technology，2021，46(11):113-123.

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