Design of Double-Toggle Clamping Mechanism for Die-Casting Machine Based on the Multi-Body Dynamics and Finite Element Method

Clamping mechanism was important for the working performance of die-casting machine. There were many factors such as various design variables and complex parameters during the design of the double-toggle clamping mechanism for which the high performance of die-casting machine could not be realized and the expansion force coefficient was small. In this paper, aimed to the design of the large clamping machansim for 25000KN die-casting machine, based on the analysis of the motion feature, the multi-body dynamics equation was construct, and the different design parameters in the optimal design math model were optimized and analyzed with the help of the MSC.ADAMS software. From result, after optimized, it was found that the expansion force coefficient was 23.59, the distance of stroke for the moving platen was decreased 20.3%; the clamping force was added to 3.25+e7N and the course of clamping mould was more stable which mean that the impact exerted on clamping mechanism was reduced. According to the optimized design proposal, the strength check for clamping mechanism was computed by numerical simulation, from the result, the design requirements were realized. And it supplied the technological reference for assurance of quality and performance of die-casting machine, based on which the prototype of 25000KN die-casting machine was manufactured.