Post-processing method of five-axis linkage NC machining

Abstract

The invention discloses a post-processing method for five-axis linked numerical control processing. The method provided by the invention comprises the following steps of: (1) separating a planned feeding amount and six parameters in a cutter location sentence from a cutter location file; (2) defining an advantage region and a disadvantage region of a non-dependent rotary axis F in a five-axis linked numerical control machine and defining corresponding advantage angle thetaFa and disadvantage angle thetaFd; (3) obtaining solutions of thetaF=arccos (k) of the axis F corresponding to each cutterlocation point and obtaining the maximum angle thetaFmax of the axis F, which rotates in the cutter location file, corresponding to the non-dependent rotary axis; (4) determining the angle value of the axis F of the cutter location data in the first row and the angle value of a dependent axis E of the axis F; and (5) obtaining angle values thetaE and thetaF of the axis E and the axis F on each cutter location point; obtaining solutions of each row of translation axis according to the angle value corresponding to each row of cutter location data so that the transformation of the cutter location data is completed and the post-processing is realized. According to the method provided by the invention, the cutter location file and the rotary limit of the non-dependent rotary axis can be considered, and the solution-selecting problem of the inverse kinetics of the five-axis linked numerical control processing is solved.

Description

technical field [0001] The invention relates to the field of multi-axis numerical control machining, in particular to a post-processing method for converting tool position files into machining codes of a five-axis linkage numerical control milling machine. Background technique [0002] With the development of aerospace, shipbuilding, automobile, energy and other industries, multi-axis linkage CNC machining technology is widely used in the processing of high-precision complex curved surface thin-walled parts. The source file of the tool position trajectory generated by the CAM software according to the shape of the part and the process parameters after planning the tool path cannot be directly used to drive the CNC machine tool. Post-processing is the process of converting tool position files into NC codes that can be recognized by the CNC system of the machine tool and correctly drive the machine tool movement. Compared with three-axis and four-axis machine tools, the five-...

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Problems solved by technology

[0003] In order to overcome the safety problems that may be caused by improper inverse kinematics solution selection in the post-processing software, and to avoid unnecessary overtravel processing caused by unnecessary overtravel processing caused by the wrong solution of the rotation axis angle for the first tool position point, the tool lift-feed, Therefore, the problem of affecting the processing quality, the present invention provides a post-processing method for five-axis linkage NC machining, which comprehensively considers the tool position file, the limit of the rotating axis and the visualization problem, and can solve the problem of improper solution selection without generating two NC programs processing problems caused by

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