Five-Axis CNC Machining Of Complex Research And Simulation Of Cutting Parameters Of Thin-Walled Curved Surface

In the field of mechanical manufacturing and processing, complex thin-walled curved surface of high precision, high speed, high efficiency machining problem is always an important urgent hot and difficult problem. The general solution is the use of NC programming associated with multi axis NC machining technology. In this thesis, the cutting parameters for the processing of five axis NC thin-walled complicated surface parts of the choice to research.The complex structure of thin-walled curved surface work piece processing difficulty is very large, processing technology to develop rational, reasonable planning of tool path trajectory, avoid the interference problem, over cutting problems in processing. This thesis analyzes the principle of the five axis NC machining, then obtains from the theory gives a detailed calculation method of cutting tool path, determine the processing bandwidth, contact points and then calculate the cutting tool and the work piece, and the knife contact into place data, UG simulation analysis for the later, and the initial attitude for the cutting tool angle control, avoid the interference problem in the tool path. At the same time is selected to achieve the optimal tool angle between the work piece surface quality and efficiency balance.Based on finite element analysis software ANSYS of thin walled curved surface stress strain conditions, according to the solution and check the stress and deformation analysis of the results, the establishment of the graphical relationships between the stress and deformation. Found in the leaves of plastic deformation does not occur, it is in the allowable stress is less than the material, the size of the corresponding stress, stress value can choose reasonable cutting parameters in experimental orthogonal table to determine the next. In this thesis, the impeller blades of 45# steel with different thickness and 2024 aluminum alloy material is studied by ANSYS software analysis, the rationality of numerical cutting parameters selection, and find a set of the most suitable cutting parameters to ensure the surface quality of high efficiency and machining process to achieve optimal. Finally carries on the machining simulation of the impeller blades by using the software UG, the cutting depth of optimization, parameter setting of feed rate into the UG machining simulation, obtains the new NC program code, compares the number and the original NC code, we can see that the processing efficiency is improved.