Research on Simulation Model of Ultra Deep Hole Machining of Nickel Base 718 Alloy

Abstract

Deep hole machining technology is widely used in aerospace, military and other fields, but for difficult to cut materials such as nickel base 718 alloy, there are bottlenecks such as poor machining accuracy and low efficiency in deep hole machining with large depth to diameter ratio. In order to improve the processing quality and efficiency of deep hole machining of nickel base 718 alloy, this paper establishes a finite element model for ultra deep hole machining of nickel base 718 alloy workpiece by gun drilling and a calculation model for straightness deviation of deep hole based on gun drilling theory and finite element method, studies the influence of tools and drilling parameters on straightness deviation of deep hole, and quotes some test data of others to verify the rationality of gun drilling model, Compared with the model in this paper at different speeds and feed rates, the adaptability of the model at different apertures was discussed. The results show that the finite element model for deep hole machining of nickel base 718 alloy established in this paper has good adaptability.