Application of Crank-Triangular Connecting Rod-Toggle Mechanism in the High-precision Press

WANG Weiren; HUANG Shuhai; LYU Gang; WU Xiaonan; DUAN Weilin

doi:10.3969/j.issn.1674-6457.2026.09.025

PDF(1862 KB)

Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (9) : 251-259. DOI: 10.3969/j.issn.1674-6457.2026.09.025

Advanced Manufacturing Technology and Equipment

Application of Crank-Triangular Connecting Rod-Toggle Mechanism in the High-precision Press

WANG Weiren¹, HUANG Shuhai^2,*, LYU Gang¹, WU Xiaonan¹, DUAN Weilin¹

Author information +

History +

Abstract

The work aims to solve the application problems of the new type toggle mechanism in the high-precision press for bottom forming of shell parts. The triangular connecting rod in the crank-triangular connecting rod-toggle mechanism was divided into multiple toggle components. The transmission mathematical equation between crank rotation angle and bottom dead displacement was derived. Based on the kinematic relationship among toggles of the crank-triangular connecting rod-toggle mechanism as well as their bottom dead, the mechanism was classified as two different types. The transmission mechanism of the press for bottom forming of shell parts was taken as research and application object. By analyzing mechanical transmission parameter characteristics between the crank-toggle mechanism and the crank-triangular connecting rod-toggle mechanism such as displacement, velocity, acceleration and mechanical benefit curve, the new type crank-triangular connecting rod-toggle mechanism had better mechanical efficiency. Under the same parameter conditions, by comparing the simulation results in the displacement, velocity, acceleration and mechanical efficiency curves between two different toggle mechanisms, it verifies that the high-precision press adopting the new crank-triangular connecting rod-toggle mechanism of Configuration II can generate large stamping force with small torque, while guaranteeing the forming accuracy of the shell bottom and reducing its plastic springback. By comparing the simulation analysis results with the stamping parameters of the press control system, it is found that the press with Configuration II of the new type crank-triangular connecting rod-toggle mechanism delivers superior mechanical efficiency and better economic benefits, which verifies the correctness of the theoretical model for this new mechanism.

Key words

high-precision press / toggle mechanism / toggle configuration type / mechanical advantage / pressing forming force

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

WANG Weiren, HUANG Shuhai, LYU Gang, WU Xiaonan, DUAN Weilin. Application of Crank-Triangular Connecting Rod-Toggle Mechanism in the High-precision Press[J]. Journal of Netshape Forming Engineering. 2026, 18(9): 251-259 https://doi.org/10.3969/j.issn.1674-6457.2026.09.025

References

[1] 何浩祥, 兰炳稷, 陈易飞, 等. 面向多性能目标的广义肘节机构优化设计方法及减震应用[J]. 振动工程学报, 2022, 35(6): 1404-1417.
HE H X, LAN B J, CHEN Y F, et al.Optimal Design Method of Generalized Toggle Mechanism Oriented to Multiple Performance and Structural Damping Application[J]. Journal of Vibration Engineering, 2022, 35(6): 1404-1417.
[2] ZHOU H, CHEUNG E H M. Optimal Synthesis of Crank-Rocker Linkages for Path Generation Using the Orientation Structural Error of the Fixed Link[J]. Mechanism and Machine Theory, 2001, 36(8): 973-982.
[3] 朱理. 机械原理[M]. 北京: 高等教育出版社, 2004: 85-98.
ZHU L.Mechanical Principles[M]. Beijing: Higher Education Press, 2004: 85-98.
[4] 李学刚. 基于傅氏级数和代数法的连杆机构综合[D]. 北京: 北京邮电大学, 2020: 17-24.
LI X G.Dimensional Synthesis of Linkage Mechanisms Based on Fourier Series and Algebraic Methods[D]. Beijing: Beijing University of Posts and Telecommunications, 2020: 17-24.
[5] HADIZADEH KAFASH S, NAHVI A.Optimal Synthesis of Four-Bar Path Generator Linkages Using Circular Proximity Function[J]. Mechanism and Machine Theory, 2017, 115: 18-34.
[6] 李义强, 戴惠良, 张治军, 等. 高速冲床肘节机构的运动特性研究[J]. 机电工程, 2020, 37(7): 743-750.
LI Y Q, DAI H L, ZHANG Z J, et al.Kinetic Characteristics of Toggle Mechanism of High-Speed Punch[J]. Journal of Mechanical & Electrical Engineering, 2020, 37(7): 743-750.
[7] GAWANDE S H, BHOJANE S A.Numerical and Experimental Design Optimization of Toggle Clamping Mechanism[J]. Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 2019, 43(4): 763-779.
[8] BALASUBRAMANYAM C, SPANDANA K R, AJAY M S, et al.Optimization Approach for Synthesis of 5 Point Double Toggle Mechanism[J]. International Journal on Interactive Design and Manufacturing (IJIDeM), 2017, 11(4): 839-850.
[9] 金旭星. 七杆式复合驱动伺服冲床的机构合成研究[J]. 锻压技术, 2013, 38(3): 107-110.
JIN X X.Research on Mechanism Synthesis of Seven-Link Hybrid-Driven Servo Press[J]. Forging & Stamping Technology, 2013, 38(3): 107-110.
[10] 胡建国, 孙友松, 章争荣. 伺服机械压力机非对称双伺服输入工作机构动力学分析[J]. 塑性工程学报, 2020, 27(10): 221-227.
HU J G, SUN Y S, ZHANG Z R.Dynamic Analysis of Asymmetrical Working Mechanism with Two Servo-Input for Mechanical Servo Press[J]. Journal of Plasticity Engineering, 2020, 27(10): 221-227.
[11] 江爱民, 章争荣, 李杰, 等. 伺服压力机双动肘杆机构的设计与研究[J]. 锻压技术, 2018, 43(2): 133-140.
JIANG A M, ZHANG Z R, LI J, et al.Design and Research on Servo-Press with Dual-Drive Toggle Mechanism[J]. Forging & Stamping Technology, 2018, 43(2): 133-140.
[12] 田轩. 伺服压力机肘节式主传动机构的精度提升与减震降噪技术研究[D]. 镇江: 江苏大学, 2024.
TIAN X.Resarch on Accuracy Improvement and Noise Reduction of the Main Drive Structure of Toggle Servo Press[D]. Zhenjiang: Jiangsu University, 2024.
[13] 王中双, 韦静. 肘杆式压力机机构动力学建模与分析向量键合图法[J]. 振动与冲击, 2019, 38(11): 140-145.
WANG Z S, WEI J.Vector Bond Graph Method for Dynamic Modeling and Analysis of a Toggle Press Mechanism[J]. Journal of Vibration and Shock, 2019, 38(11): 140-145.
[14] 王中双, 尹久政. 考虑运动副间隙三角连杆肘杆式压力机机构动力学研究[J]. 机械传动, 2021, 45(3): 1-7.
WANG Z S, YIN J Z.Dynamics Study of a Triangular Connecting Rod Toggle Press Mechanism with Considering the Kinematic Pair Clearance[J]. Journal of Mechanical Transmission, 2021, 45(3): 1-7.
[15] 李永豪, 程广贵, 孙万, 等. 热-力耦合作用下伺服压力机下死点形变机理及误差补偿[J]. 锻压技术, 2026, 51(1): 242-249.
LI Y H, CHENG G G, SUN W, et al.Deformation Mechanism and Error Compensation of Bottom Dead Center for Servo Press under Thermo-Mechanical Coupling[J]. Forging & Stamping Technology, 2026, 51(1): 242-249.
[16] 李建, 刘战胜, 王文博, 等. 考虑工程设计约束的重载伺服压力机双曲柄肘杆机构优化[J]. 机械设计, 2024, 41(12): 63-70.
LI J, LIU Z S, WANG W B, et al.Optimization Design of Heavy-Duty Servo Press' Double Crank-Toggle Mechanism with Engineering Constraints Taken into Consideration[J]. Journal of Machine Design, 2024, 41(12): 63-70.
[17] 孙万, 王兆坤, 汪子康, 等. 考虑间隙冲击的六连杆伺服压力机建模及动力学响应特性研究[J]. 机床与液压, 2025, 53(13): 77-83.
SUN W, WANG Z K, WANG Z K, et al.Dynamic Modeling and Response Characteristics Analysis for Six-Bar Servo Press with Clearance Impact[J]. Machine Tool & Hydraulics, 2025, 53(13): 77-83.
[18] 孙友松胡建国程永奇. 伺服机械压力机[M]. 北京: 机械工业出版社, 2019: 36-69.
SUN Y S, HU J G, CHENG Y Q.Servo Mechanical Press[M]. Beijing: China Machine Press, 2019: 36-69.