Method of smoothening five-axis-linkage machine tool machining path by using ball-end cutter

Abstract

The invention discloses a method of smoothening a five-axis-linkage machine tool machining path by using a ball-end cutter. The method comprises the following steps: firstly, generating cutter spacing source files according to the geometrical shape and technological parameters of a processed part; secondly, sequentially reading the source files in a non-interlaced way, analyzing, extracting cutter locating point positions and cutter shaft vectors, and judging whether cutter locating lines interfere taper angles or not to ensure the operation on taper angle values, thereby obtaining taper angle cutter road files; thirdly, sequentially reading the taper angle cutter road files in a non-interlaced way, analyzing, extracting cutter locating points, cutter shaft vectors and taper angles, and determining the operation of an optimum cutter shaft vector in all the cutter locating lines; and fourthly, calculating the coordinates of cutter locating points according to the optimum cutter shaft vector and then carrying out postposition process to generate the machine tool machining path, thereby realizing smoothing process on the machine tool machining path. According to the method, a cutter shaft is subjected to smooth transition to realize three-axis machining partially, thereby eliminating partial non-linear errors, solving the problem of large rotation of a rotating shaft of a machine tool in singular positions, and enhancing the machining efficiency.

Description

technical field [0001] The invention relates to the field of multi-axis linkage numerical control machining, and more specifically relates to a method for smoothing the machining path of a five-axis linkage machine tool using a ball-end cutter. Background technique [0002] With the development of aerospace, shipbuilding, automobile, energy, metallurgy and other industries, multi-axis linkage CNC machining technology is being widely used in the processing of high-precision complex curved surface thin-walled parts. During the multi-axis linkage CNC machining process, the machining tool path can be reasonably planned according to the part geometry and process parameters, and the corresponding tool position trajectory file can be generated. The file needs to be converted into a NC machining program after post-processing in order to drive the machine tool for processing. Compared with the three-axis machine tool, the five-axis machine tool adds two rotation axes, so that any to...

AI Technical Summary

Problems solved by technology

Compared with the three-axis machine tool, the five-axis machine tool adds two rotation axes, so that any tool axis direction can be adjusted to avoid some inevitable interference problems in the three-axis machine tool processing, but at the same time it also brings post-processing aspects of the problem

When the five-axis machine tool is in a singular position, the slight swing of the tool axis in the planned tool path will cause unnecessary large-scale rotation of the machine tool rotation axis. At this time, with the nonlinear error maximization, the machining path may be disordered.

Knut Sorby published a paper in the 2006 machine tools&manufature magazine and proposed a five-axis post-processing interpolation method for singular position processing. Through interpolation, the large and fast rotation becomes a segmented and small slow rotation, making the processing at the singular position become easier. Safe, but it does not substantially solve the large rotation behavior of singular positions, and makes the processing efficiency low

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