Research and application of post-processing technology for five axis CNC machine tools

Modern manufacturing industry has put forward more and more requirements for NC equipment, which requires equipment to achieve high speed, high efficiency, high precision and complex parts processing. As a modern equipment for machining complex parts, five-axis CNC machine tools have been more and more widely used. During the development and application of five-axis NC machine tools, a series of key technical problems need to be solved, among which the most important is how to realize the programming of five-axis NC machine tools. At present, the programming of five-axis NC machining mostly adopts computer automatic programming, and the post-processing technology is the most critical technology in automatic programming. Because of the diversity of the structure of five-axis CNC machine tools, it is very difficult to develop the post-processor of five-axis CNC machine tools, especially the post-processor considering the function of spatial position compensation. If the post-processing problem is not solved properly, the light processing equipment can not give full play to its advantages in function and processing efficiency, resulting in small use of large materials, and serious production accidents. In this paper, a five-axis NC machining center with two turntables installed on the worktable of a three-axis vertical machining center is studied. The programming of NC machining program for complex parts and the development of special post-processor are studied. The main research contents of this paper are as follows: (1) Based on the research of the structure and CNC system of five-axis CNC machine tool and the post-processing algorithm of five-axis CNC machine tool, a special post-processor for five-axis CNC machine tool with double turntable is developed under the VB development environment. (2) use UG software to work out the impeller machining plan and generate the tool path of impeller machining. The NC machining program of impeller is generated by the special post processor and the post processor of the five-axis NC machine tool generated by UG / Post, and the correctness of the special post processor is verified by comparing the NC machining program generated by them. (3) Using the VERICUT NC machining simulation software to model the five-axis NC machine tool with double turntable, and the machining process of the impeller is simulated to verify the correctness of the machining program. (4) The theoretical deduction and the usability of the special post-processor are verified by machining the typical impeller on a five-axis NC machine tool. The research of this paper has a certain practical significance on how to develop the post-processor of five-axis NC machine tools and solve the problems related to the post-processing of five-axis NC machine tools.