三种对称多连杆式冲压机构传动特性对比分析
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摘要
为改善对称多连杆式冲压机构的传动特性,对连杆和肘杆进行变异演化得到新的冲压机构。并对3种冲压机构进行了受力分析,通过理论推导,建立了机械利益与主要结构参数之间的关系。并通过数值分析,获得工作滑块位移和速度曲线、螺杆驱动扭矩曲线以及机械利益曲线。最后,通过对计算结果的对比分析,发现三角连杆方案在保持机械利益的同时,可提高工作节拍;而三角下肘杆方案不仅可提高工作节拍,还具有良好的速度均匀性。传动特性的对比分析结果可为3种对称多连杆式冲压机构的设计和选型提供参考。
In order to improve the transmission characteristics of the symmetrical multi-link stamping mechanism,the new stamping mechanisms were obtained by mutation and evolution of connecting rod and elbow rod. And the relationship between mechanical advantage and main structural parameters was established based on the theoretical deduction by analyzing the forces of three kinds of stamping mechanisms. Then,the displacement and velocity curves of working slider,the screw driving torque curves and the mechanical advantage curves were obtained by numerical analysis. Finally,through comparative analysis on calculation results,the triangular connecting rod scheme can improve working rhythm while maintaining mechanical advantage,and the triangular lower elbow rod scheme not only improves the working rhythm,but also has good speed uniformity. The comparative analysis results of transmission characteristics can provide reference for the design and selection of three symmetrical multi-link stamping mechanisms.
In order to improve the transmission characteristics of the symmetrical multi-link stamping mechanism,the new stamping mechanisms were obtained by mutation and evolution of connecting rod and elbow rod. And the relationship between mechanical advantage and main structural parameters was established based on the theoretical deduction by analyzing the forces of three kinds of stamping mechanisms. Then,the displacement and velocity curves of working slider,the screw driving torque curves and the mechanical advantage curves were obtained by numerical analysis. Finally,through comparative analysis on calculation results,the triangular connecting rod scheme can improve working rhythm while maintaining mechanical advantage,and the triangular lower elbow rod scheme not only improves the working rhythm,but also has good speed uniformity. The comparative analysis results of transmission characteristics can provide reference for the design and selection of three symmetrical multi-link stamping mechanisms.
引文
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[3]付继祥,郭为忠,高峰.基于性能图谱的双肘杆伺服压力机杆系全局优化设计[J].上海交通大学学报,2009,43(4):688-692.Fu J X,Guo W Z,Gao F.Global dimensional optimization of double-knuckle servo mechanical press based on performance atlases over bounded solution space[J].Journal of Shanghai Jiaotong University,2009,43(4):688-692.
[4]Anonym.实绩机事例介绍:MLSP-500[EB/OL].http://www.amino.co.jp/web/products/mlsp.2018-07-20.Anonym.Introduction of performance plans:MLSP-500[EB/OL].http://www.amino.co.jp/web/products/mlsp.2018-07-20.
[5]莫健华,张正斌,吕言,等.三角肘杆式伺服压力机传动机构的仿真与优化[J].锻压装备与制造技术,2011,46(1):21-25.Mo J H,Zhang Z B,Lyu Y,et al.The simulation and optimization of triangle toggle rod transmission mechanism for servo press[J].China Metalforming Equipment&Manufacturing Technology,2011,46(1):21-25.
[6]Osakada K,Mori K,Altan T,et al.Mechanical servo press technology for metal forming[J].CIRP Annals-Manufacturing Technology,2011,60(2):651-672.
[7]Yoneyama T,Miyoshi K,Tate T.Contact stress and temperature during air-stamp hammer upsetting of a circular cylinder[J].Journal of Manufacturing Processes,2018,32(4):791-801.
[8]何红,刘滔,李聪基,等.冲压生产用送料转盘机构及自动控制系统设计[J].包装工程,2017,40(15):1-4.He H,Liu T,Li C J,et al.Design of feeding turntable mechanism and automatic control system in stamping production[J].Packaging Engineering,2017,40(15):1-4.
[9]袁良照.多连杆机械压力机传动系统关键技术研究[D].合肥:合肥工业大学,2017.Yuan L Z.Key Technology Research on Transmission System of Multi-link Mechanical Press[D].Hefei:Hefei University of Technology,2017.
[10]Chen X M,Zhao Y F,Zhang C Y,et al.Robot needle-punching for manufacturing composite performs[J].Robotics and Computer-Integrated Manufacturing,2018,50(4):132-139.
[11]安淑女,王洪欣.单自由度冲压机构优化设计及其运动仿真[J].华侨大学学报:自然科学版,2016,37(5):547-551.An S N,Wang H X.Optimum design and motion simulation of single degree of freedom stamping mechanism[J].Journal of Huaqiao University:Natural Science,2016,37(5):547-551.
[12]罗明军,高发华,代立宏,等.SUV多连杆后悬架的开裂失效分析及结构优化[J].南昌大学学报:工科版,2017,37(3):268-273,279.Luo M J,Gao F H,Dai L H,et al.Cracking failure analysis and structural optimization of multi-link rear suspension for SUV[J].Journal of Nanchang University:Engineering&Technology,2017,37(3):268-273,279.