Research On Cutting Dynamic Simulation And Deformation Control Of Large Diameter Thin-walled Cylinder Parts

Titanium large diameter thin-walled cylinder part is widely applied to aircraft engines, because of its light weight and high strength’ characteristics. Because the characteristics of cutting difficult and poor stiffness, and the deformation rules are not found In actual processing, process and clamping are determined by experience. Therefore, the work-piece often occur oversize phenomenon, even scrapped.In this paper, the turning and milling of work-piece were analyzed from the perspective of static analysis and dynamic simulation. It gets the deformation trends and laws of the work-piece in the cutting process, and proposes the methods of deformation control.Based on the dynamic turning and milling of titanium alloy Ti-6Al-4V thin-walled cylindrical structure’s simulation analysis, this paper achieve the following findings:(1) Cutting force of titanium alloy Ti-6A1-4V materials. Turning force and milling force of titanium alloy Ti-6A1-4V material were calculated depend on theoretical calculation and cutting simulation’s method. In order to get the higher accurate three dimensional cutting force, it makes a comparative analysis of several different cutting force calculate method. Meanwhile, solve the cutting force of turning and milling through the dynamic cutting simulation. Mutual authentication of two ways can improve the accuracy of titanium alloy Ti-6A1-4V cutting force.(2) Statics analysis of thin-walled cylindrical part. Establishing a finite element static model of thin-walled cylindrical part. Making the thin-walled cylindrical part’s statics analysis and getting the stress and deformation trends.(3) Turning and milling simulation of thin-walled cylindrical part. A turning and milling temperature-displacement coupled dynamic simulation model of thin-walled structures part was established. Turning and milling dynamic situation of thin-walled cylindrical part was simulated. The cutting force, stress, deformation and temperature field’s rule with cutting process was presented.(4) Deformation analysis control of thin-walled cylindrical part. Through comparing and verifying the results of static and dynamic simulation, we can reach conditions and rules of the thin-walled cylindrical parts’ deformation and present deformation precautions of titanium alloy for thin-walled cylindrical parts and improve the machining accuracy of the work-piece.