Five-axis post-processing method based on machine tool entity model

Abstract

The invention provides a five-axis post-processing method based on a machine tool entity model. The method comprises the following steps of 1, preprocessing a cutter position source file, 2, conducting inverse kinematics, 3, conducting high-order correction and 4, conducting intelligent solution selection. The five-axis post-processing method has the advantages of having universality, practicability and high self-adaptability.

Description

technical field [0001] The invention relates to machine tool processing, in particular to a five-axis post-processing method based on a machine tool entity model. Background technique [0002] Complicated parts in the fields of automobile, aerospace and military can be processed by five-axis CNC machine tools, and the machining tool path programming is difficult, which needs to be realized with the help of CAM (computer aided manufacturing, computer aided manufacturing) programming software. The CAD / CAM system can edit the tool path of the model to generate the tool position source file (CLSF for short), which is also called the pre-processing file. The tool position source file not only includes the tool tip point and the tool axis vector, but also the machine tool Processing related information, such as feed rate, water cooling and tool change commands, etc. A five-axis machine tool is basically composed of three translation axes and two rotation axes. The control systems...

AI Technical Summary

Problems solved by technology

[0004] 1) The versatility is not strong, many post-processing systems only perform post-processing for specific machine tools, and five-axis machine tools can be roughly divided into three types, namely double swing head, double turntable and swing head + turntable form, which can be Establish the kinematics model separately to convert the tool position file into the movement amount of each axis

[0005] 2) The function is single. Most of the post-processing systems only solve the kinematics without considering the actual processing environment, such as collision problems, overtravel problems, and singular problems in the processing process, which will bring serious problems to the machine tool. Consequences, there is no guarantee that the post-processed NC code can be used in actual processing

[0006] 3) The model of the machine tool is not considered, which is a common problem in post-processors nowadays. That is to say, if the actual processing environment is not considered, it is difficult to imagine the movement of each axis of the five-axis machine tool, and the change of the attitude of the tool axis It is hard to estimate, only code optimization based on the solid model can finally guarantee the safety and correctness of processing

[0007] 4) There is a lack of solution optimization. The existing post-processor will generate a set of solutions according to the user's requirements. Generally, there are two sets of solutions for the same tool position. In the final processing, try to select the solution obtained by the same inverse solution formula, but It is impossible to intelligently select a set of solution sets without interference. This can only be achieved with the help of a solid model

Images