A method for generating circumcision toolpath based on image processing under the constraints of skin mirror milling process

Abstract

A circumcision tool path generation method based on image processing under the constraints of skin mirror milling process, including the following steps: ① extract the boundary geometric features of the cavity area to be processed on the skin, and convert it into an image; ② extract The central skeleton of the binary image, calculate the shortest Euclidean distance between the contour pixel point and the central skeleton; ③ take the central skeleton as the center and offset outward to generate the initial ring cutting tool path; ④ convert the initial tool path into an image, The process constraint verification of the tool path is carried out, and the tool path image is iteratively deformed by using the moving least squares technique to optimize the tool path until the optimal circular cutting tool path that meets the process constraints is obtained. The invention can overcome the drawbacks that the traditional tool path generation method is difficult to apply to the constraints of the skin mirror image milling process, realize the generation of the tool path under the process constraints, and finally obtain a mirror image that satisfies the processing without residue, qualified step distance, smooth trajectory, and no lifting tool The milling cutter track meets the requirements of skin mirror milling.

Description

technical field [0001] The invention belongs to the technical field of computer-aided manufacturing (CAM), in particular to a method for generating and optimizing a ring cutting tool track, in particular to a method for generating a ring cutting tool track for skin mirror milling. The geometric boundary of the cavity to be processed is converted into image information, and then based on this information, image processing technology is used to generate and optimize the ring cutting tool path under the constraints of the process. Background technique [0002] There are many groove features on the aircraft skin. Due to its own characteristics, large size, complex shape, high material removal rate, and poor rigidity, its processing quality has not been well controlled. In order to overcome the disadvantages of excessive deformation of the skin due to insufficient rigidity during the milling process, the current manufacturing industry adopts a skin mirror milling system. Add rig...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the traditional tool path generation method is difficult to meet the process constraints and is not suitable for skin mirror milling, and to invent a circumcision tool path generation method based on image processing under the constraints of skin mirror milling process. It generates the initial circular cutting tool path according to the geometric boundary of the processing area, avoiding the phenomenon that the tool path is not smooth due to geometric degradation, and uses image processing technology to iteratively deform the tool path, and through overall optimization, the final generated tool path meets the skin mirror milling process constraint

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