Reliability Optimization Design Method for Firearms Automaton Mechanism

Abstract

AbstractIn order to deal with the reliability optimization design problem of mechanisms containing multiple motion phases and multiple collisions, this paper takes the firearms automaton as an example and gives a general method to deal with such problems. Firstly, the motion stages are divided according to the automatic cycle diagram of the firearms automaton, and the discrete dynamics model of the firearms is established. Then the reliability model of the automaton mechanism is established based on the performance margin theory. Finally, taking the pressure coefficient of air chamber, the friction coefficient of the guide, the stiffness of the counter-recoil spring and the stiffness of the hammer spring as design variables, the optimized design variables are obtained through the calculation of the sequential quadratic programming (SQP) algorithm. The results of the optimized design are close to the idealized results of the existing products, which proves the rationality and effectiveness of the mechanism reliability optimization design method proposed in this paper.