Optimizing Clamping And Cutting Parameters Simultaneously Of Thin-walled Frame Parts

In order to reduce weight, thin-walled structural parts are widely used in many areas, especially in aviation manufacturing industry. And thin-walled frame part, which is composed of web and ribs, is one of the most important thin-walled structural parts. Such parts are easily deformed under the actions of cutting and clamping during machining, and it is very difficult to guarantee the machining accuracy, so it has great practical value to improve the machining accuracy in thin-walled frame parts machining.Referred to elastic deformation of thin-walled frame parts under the actions of cutting and clamping in processing, in order to compensate for the shortcomings of step-by-step optimization of clamping and cutting parameters, Particle Swarm Optimization Algorithm is presented to optimize clamping and cutting parameters simultaneously, optimization model for clamping and cutting parameters is established, and the elastic deformation is not changed until a minimum under different conditions of clamping and cutting parameters.First, in order to make the cutting force model closer to the actual processing conditions, and make cutting forces prediction much more accurate, orthogonal test and regression analysis method are used to determine the parameters about milling force experience model. Secondly, finite element model for thin-walled frame part machining is established, based on milling path and milling characteristics, algorithm of moving loading step-by-step and element birth and death is presented. At last, optimization model for clamping and cutting parameters is established, and the elastic deformation is not changed until a minimum under different conditions of clamping and cutting parameters. Simulation results show that:the proposed optimization method has obvious optimization effects.By simulation analysis and processing test on a specific thin-walled frame part, the feasibility of the method referred to in this article is verified. The test results show that:the method of simultaneous optimization raised by this article can effectively reduce the elastic deformation of thin-walled frame parts, and can be used to improve the processing accuracy of thin-walled frame parts.