Generation method of planar spiral and annular milling tracks

Abstract

The invention discloses a generation method of planar spiral and annular milling tracks. The generation method comprises the following steps: acquiring a plane machining region of a multi-shaft cutter, performing triangle grid division on the plane machining region to construct an energy field; establishing a constraint equation of the energy field, performing finite element solution on the constraint equation to obtain a field function; establishing a divide curve family according to the finite element solution to acquire a cutting line of a length maximum value; calculating equal scalar value curves according to the cutting line of the length maximum value, and cutting the plane machining region into m sub-regions, wherein m is an positive integer; and respectively performing interpolation on each pair of equal scalar value curves in the m sub-regions to obtain spiral lines. According to the generation method of the planar spiral and annular milling tracks, the vibration generated in the machining process of a numerical control machine tool can be reduced, at the same time, the processing efficiency is improved, and the loss of the cutter is reduced.

Description

technical field [0001] The invention belongs to the field of numerical control machining, and more specifically relates to a method for generating plane spiral and ring milling tracks. Background technique [0002] In the field of CNC machining, the tool path generated by CAM greatly affects the machining efficiency. Mainly in the smoothness of the tool path curve, the uniformity of the spacing of the machining path, etc. Traditional CAM software adopts line cutting, ring cutting, etc. to achieve equal spacing of processing lines to a certain extent, but cannot guarantee absolute equal spacing under the curved surface. There is too much lifting of the knife in the line cutting, and although the ring cutting can reduce the lifting of the knife, there are too sharp corners. It causes uneven processing and material removal and vibration of the machine tool, which intensifies the wear of the tool and the damage of the machine tool. At the same time, due to the existence of th...

AI Technical Summary

Problems solved by technology

This method can only be offset from the outer boundary or inner boundary, and lacks the optimization of offset line distribution (smoothness) and line spacing control in the global range; at the same time, area segmentation will be automatically generated during the advancement of the cavity, forming multiple advances and retreats Tool path; for complex machining surfaces, due to any possible shape between offset contour lines, when using the general gradient (Morphing) algorithm to construct a helix, the overlap of the actual cutting path cannot be completely avoided

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