351. Research on dynamics model of the motion clamping mechanism in injection molding machines addressing inertia and deformation
- Author
-
He, Zhiqiang, Zhai, Fugang, Zhang, Yin, Wang, Weibo, Li, Dong, Zhu, Ningdi, and Ruan, Jianbo
- Abstract
Motion clamping mechanisms (MCM) play a crucial role in scenarios requiring multi-phase motions, notably in processes like the injection molding machine. The working process of mechanicals, which necessitates precise positioning, swift response, and the seamless coordination of multi-phase movements, is primarily impeded by the inertia and deformation of the components. This paper introduces modelling techniques for the four motion phases of the MCM. The methods include the symmetric recursion method based on Newton-Euler dynamics and the deformation distribution method based on the ratio of component stiffness coefficients. By considering inertia and deformation, models are established for each sub-phase of the motion process, and tackles complex friction challenges associated with multiple friction pairs, as well as resolving the issue of fixed joint space mechanisms being unable to be unilaterally deduced. A logic based on dual parameters of position and pressure, is devised to create a comprehensive dynamic model of the mechanism's entire process. Experimental validation demonstrates that the accuracy of sub-model exceeds 90 %, while the continuous model maintains an accuracy of over 97 % in multiple tests. The method improves the accuracy of identification and switching by 16.7 %, resulting in a high-precision dynamic describe of the entire process of the MCM, thereby validating its effectiveness.
- Published
- 2024
- Full Text
- View/download PDF