锻压技术

浅孔杯形件挤压工艺研究及模具涂层应用

英文标题：Study on extrusion process of cup-shaped parts with shallow holes and application of die coating

作者：邵长静

关键词：杯形件挤压工艺浮动凹模磨损涂层

分类号：TG376.3

出版年,卷(期):页码：2021,46(8):131-137

摘要：

以某浅孔杯形件为研究对象，依据塑性成形理论，设计了4种挤压成形工艺，即上冲头反挤压、浮动凹模上冲头反挤压、上冲头正挤压以及浮动凹模上冲头正挤压工艺，采用DEFORM软件分析了4种挤压成形工艺下杯形件的成形质量及各主冲头的磨损情况，并确定了成形工艺。为降低主冲头磨损，研究了在TiN、TiCN、TiN-TiCN涂层下各主冲头的磨损情况,并确定了合理的镀层材料。通过正交试验法，研究了冲头圆角半径、摩擦因数、冲压速度、涂层厚度对冲头表面磨损深度的影响，并确定了最佳工艺参数。结果表明：在保证零件质量的条件下，采用浮动凹模上冲头正挤压工艺，冲头涂层材料选择TiN-TiCN复合涂层，工艺参数选择涂层厚度为4 μm、摩擦因数为0.08、冲压速度为10 mm·s-1和冲头圆角半径为6 mm时，主冲头完成单次挤压后的磨损量较小。

For the cup-shaped part with shallow hole，four kinds of extrusion processes were designed according to the theory of plastic forming, namely, the upper punch backward extrusion，the upper punch backward extrusion with floating die，the upper punch forward extrusion and the upper punch forward extrusion with floating die processes, and the forming qualities of cup-shaped parts and the wear conditions of each main punch under four kinds of extrusion forming processes were analyzed by software DEFORM to determine the forming process. In order to reduce the wear of main punch，the wear conditions of main punch under TiN，TiCN and TiN-TiCN coatings were studied respectively，and the reasonable coating material was determined. Furthermore, the influences of punch fillet radius，friction coefficient，stamping speed and coating thickness on the wear depth of punch surface were studied by orthogonal test method，and the optimum process parameters were determined. The results show that under the condition of ensuring the quality for parts，the wear value of main punch after single extrusion is smaller by adopting the process of upper punch forward extrusion with floating die，selecting TiN-TiCN composite coating as the coating material of punch, and choosing the process parameters such as the coating thickness of 4 μm，the friction coefficient of 0.08，the stamping speed of 10 mm·s-1 and the punch fillet radius of 6 mm.

基金项目：

邵长静（1982-），女，硕士，讲师 E-mail：561319188@qq.com

参考文献：

［1］洪慎章. 冷挤压实用技术
［M］. 北京：机械工业出版社，2014.

Hong S Z.Practical Technology of Cold Extrusion
［M］.Beijing：China Machine Press，2014.

［2］洪深泽. 挤压工艺及模具设计
［M］. 北京：机械工业出版社，1996.

Hong S Z.Extrusion Process and Die Design
［M］. Beijing：China Machine Press，1996.

［3］张东民，盛育东，周伟民，等. SCM435合金钢线材浮动反挤压成形模拟及参数优化
［J］. 铸造技术，2017，38(11):2698-2700.

Zhang D M，Sheng Y D，Zhou W M，et al.Forming simulation and parameter optimization of floating back extrusion for SCM435 alloy steel wires
［J］.Foundry Technology，2017，38(11):2698-2700.

［4］陈波，周志明，曾华成，等. 基于DEFORM-3D的筒形件冷挤压成形数值模拟
［J］. 重庆理工大学学报：自然科学，2018，32(1):124-128.

Chen B，Zhou Z M，Zeng H C，et al.Numerical simulation on cold extrusion of cartridge based on DEFORM-3D
［J］.Journal of Chongqing University of Technology：Natural Science，2018，32(1):124-128.

［5］樊文欣，李志伟，李凤刚，等. 利用RBF神经网络预测反挤压连杆衬套过程中的挤压力
［J］. 锻压技术，2019，44(5):180-184.

Fan W X，Li Z W，Li F G，et al.Prediction of extrusion force in backward extruding connecting rod bushing process by RBF neural network
［J］.Forging & Stamping Technology，2019，44(5):180-184.

［6］蔡力钢，刘海东，程强，等. 基于正交试验法的模锻模具磨损分析及优化
［J］. 北京工业大学学报，2020，46(1):1-9.

Cai L G，Liu H D，Cheng Q，et al.Analysis and optimization of die forging wear based on orthogonal test method
［J］.Journal of Beijing University of Technology，2020，46(1):1-9.

［7］邹琼琼，黄继龙，龚红英，等. 基于DEFORM-3D的汽车花键轴零件冷挤压工艺参数优化设计
［J］. 塑性工程学报，2016，23(5):8-13.

Zou Q Q，Huang J L，Gong H Y，et al.Optimization of cold extrusion for automobile spline shaft parts based on DEFORM-3D
［J］.Journal of Plasticity Engineering，2016，23(5):8-13.

［8］骆静，谭安平，尹小燕，等. 双联齿轮的冷挤压工艺
［J］. 锻压技术，2019，44(9):73-79，87.

Luo J，Tan A P，Yin X Y，et al.Cold extrusion technology of duplicate gear
［J］.Forging & Stamping Technology，2019，44(9):73-79，87.

［9］张京，吴淑芳，陈风龙. 气门顶杆冷挤压过程模具磨损研究
［J］. 机械工程与自动化，2019，(2):33-35.

Zhang J，Wu S F，Chen F L.Research on wear of cold extrusion die for valve stem
［J］. Mechanical Engineering and Automation，2019，(2):33-35.

［10］陆元三，王培安，郭欢欢. 挤压次数对端盖凸模磨损的失效模拟研究
［J］. 材料保护，2020，53(1):96-100，119.

Lu Y S，Wang P A，Guo H H.Failure simulation of extrusion times on endface punch wear
［J］.Materials Protection，2020，53(1):96-100，119.

［11］张东民，刘铭心，盛育东，等. 薄壁六角螺母冷镦过程中模具磨损模拟分析及参数优化
［J］. 润滑与密封，2017，42(10):114-117.

Zhang D M，Liu M X，Sheng Y D，et al.Process analysis and parameter optimization on die wear in cold heading for thin-walled hex nut
［J］.Lubrication Engineering，2017，42(10):114-117.

［12］温庆华. 基于正交试验法的影响截齿受力参数优化研究
［J］. 煤矿机械，2019，40(9):187-190.

Wen Q H.Research on optimizing force parameters of cutter tooth based on orthogonal experiment method
［J］.Coal Mine Machinery，2019，40(9):187-190.

［13］范建祥，程道来，倪伟豪. 基于正交试验汽车六角螺母冷挤压模具磨损规律分析及优化
［J］. 铸造技术，2018，39(4):929-932.

Fan J X，Cheng D L，Ni W H.Process analysis and optimization on die wear in cold extrusion for vehicle hex nut
［J］. Foundry Technology，2018，39(4):929-932.

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