Optimization Of Processing Parameters And Simulation In Multi-axis CNC Machining

Speed, accuracy and efficiency are the key performance indexes for evaluating multi-axis CNC machines. Enhancing and maximizing CNC machining equipment efficiency is an important issue in the face of manufacturing, particularly, there are still many technical challenges on multi-axis CNC machining of complex surfaces.This thesis aims at a number of problems which appear in digital manufacturing process, creates mathematical model, analyzes the causes and presents preventive measures, then inverts experience of works into scientific theory. At the same time, study how to improve the machining accuracy of complex surface and machining efficiency under the premise of existing CNC machine. Then we can get high-accurate products and shorten the product developing time.Today, sculptured surfaces are widely used in aeronautical, automotive and many other industries. Thus this paper is based on complex surface (impeller) study to optimize the tool-path and machining process parameters by adjustment inclination and tilt angle of tools. It proposes an adaptive iso-parameter method to generate tool-path. Comparing with iso-parameter and iso-planar methods shows that the proposed method can reduce the tool-path length and the machining time, and improve the efficiency of machining and surface quality as well. This paper uses the secondary development function of UG, aims at sculptured surfaces to simulate the machining process by adjustment inclination and tilt angles of tool, gets the optimal inclination and tilt angles by which the material removal rate is largest, reduces interference possibility between the tool, machine and the environment, and decreses the allowance for next process. Finally, using VERICUT powerful function simulates machining process of 4-axis complex surface and gets the machining statements.In the end, the results and conclusions of this thesis are summarized, and the prospect of further research on it is opened up.