Research On The Machining Simulation System Based On Machine Tool Interpolation Data

This paper focuses on the on-machine simulation system of multi-axis CNC machine tools.starting from the multi-axis CNC machining simulation framework,machining simulation rough model and Boolean operation,machining simulation workpiece model visualization,etc.,the research on the operation efficiency and simulation accuracy of the on-machine CNC machining system was studied.The traditional CNC machining framework is based on machining codes,namely G codes or M codes.Since it is impossible to understand the internal interpolation algorithm of the machine tool,the motion state of the machine tool cannot be accurately restored in the interpolation segment.In response to this problem,this paper uses a CNC machining framework based on internal interpolation data from the CNC system and integrates with the CNC system to directly obtain the current machine axis interpolation data to fit in-machine simulation and improve the degree of reduction compared with the machining code simulation.The workpiece model and its Boolean operation have been the key technology in machining simulation,but the Boolean operation for Voxel data has always had the problem that the single-step operation speed will decrease as the number of operation steps increases.Based on the in-depth study of various workpiece models and their suitable Boolean operations,based on the continuity of the tool surface and the workpiece surface,and based on the research method of computer graphics,this paper proposes a Boolean based on region growth method and the corresponding workpiece model to achieve higher speed Boolean operation of machining simulation.And experiments verify its feasibility and efficiency.The visualization of the workpiece model during processing is an important step in turning the computer data into a visual image and presenting it to the user in the machining simulation.Aiming at the insufficient calculation efficiency of the existing octree visualization algorithm and the information error and loss of the equivalent surface algorithm Marching-Cube algorithm in some areas,by comparing various visualization schemes and optimizing the workpiece model,based on the traditional area growth algorithm and Dual-Contouring algorithm,combining the two,a visualization algorithm based on the area growth Dual-Contouring algorithm is proposed.The visualization accuracy improves the efficiency of the algorithm.Finally,based on the above research results,the software prototype of the on-machine multi-axis CNC machining simulation system was completed,which can realize various functions such as machine tool motion simulation,collision detection,and machine tool machining simulation.