A planar hybrid tool path generation method for automatic partitioning and step-by-step processing of blanks

Abstract

The invention discloses a plane machining mixed tool path generating method based on potential energy field gradient lines. According to the method, partition is conducted on machining regions through the change trend of the length of the potential energy field gradient lines, and one-way line cutting tool paths and spiral tool paths are generated in different machining regions respectively. The method includes the steps that a virtual potential energy field is generated in a plane machining region, and a series of gradient lines are obtained; starting from the corner of a workblank, the extreme position of the boundary line of two tool path regions is obtained along the outer boundary of the workbench through a search algorithm based on the length of the gradient lines; a scale factor is introduced (the proportion of the region machined by the one-way line cutting tool paths in the whole machining region), the proportions of two tool paths are determined according to the specific shape of the workblank and a blade on the basis of the extreme boundary line so as to obtain the machining regions of the two tool paths, and the one-way line cutting tool paths and spiral tool paths are generated in the two regions respectively. Compared with the method of machining through the one-way tool paths, the mixed tool paths generated by the method are more even in cutting depth and higher in machining efficiency.

Description

technical field [0001] The invention belongs to the field of milling processing, and more specifically relates to a method for generating a planar mixed tool path for automatic partitioning and step-by-step processing of blanks. Background technique [0002] In the field of cutting processing, the tool path should be as smooth and continuous as possible, so as to increase the speed of tool movement and reduce the number of lifting and empty tools to improve processing efficiency; the depth of cut (row spacing) should be as uniform as possible, so as to obtain a stable material removal rate to reduce Small fluctuations in cutting force result in longer tool life and improved cutting quality. However, a single unidirectional row cutting knife path and a spiral knife path cannot achieve the desired effect. [0003] When processing with one-way cutting tool path, because the tool path is a cluster of parallel straight lines, the tool movement direction is a fixed value, and the...

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Problems solved by technology

[0008] In view of the above defects or improvement needs of the prior art, the present invention provides a planar hybrid tool path generation method for automatic partitioning and step-by-step processing of blanks, which cuts off the area at the convex corner of the blank first, so that the remaining part The distance distribution between the blank and the blade can be relatively uniform, so as to solve the problem of low processing efficiency caused by the change of depth of cut in the prior art, and the tool path formed by the method of the present invention is relatively smooth

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