Mixed fill path generation method in arc fuse additive manufacturing technology

A technology of additive manufacturing and mixed filling, which is applied in the field of additive manufacturing, can solve the problems of poor outer surface quality and low efficiency, and achieve the effects of improving algorithm execution efficiency, increasing strength, reducing times and empty strokes

Inactive Publication Date: 2018-08-28
WUHAN UNIV OF TECH
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Problems solved by technology

[0004] When there is a hollow area in the section of the 3D model, the existing path planning is to cross the hollow area by increasing the number of welding torch arc ignition times and empty strokes. This method is inefficient and the quality of the outer surface is not high.

Method used

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  • Mixed fill path generation method in arc fuse additive manufacturing technology
  • Mixed fill path generation method in arc fuse additive manufacturing technology
  • Mixed fill path generation method in arc fuse additive manufacturing technology

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] A method for generating a hybrid filling path in an arc fuse additive manufacturing technology, comprising the steps of:

[0036] S1. Traverse the data points of the contour of the section edge and the edge of the hollow area and delete the collinear points on the contour. Specifically, set a vertex in the contour line as P i , looking clockwise along the contour line, the previous point is P i-1 , the latter point is P i+1 , the vector and The included angle is θ, we know If cosθ=0, then P i-1 , P i , P i+1 Three points are collinear, delete P from the contour line i points, and so on, traverse the data points of the contour, delete all collinear points, and only keep the vertices of the contour.

[0037] S2. Sort the data points on the contour clockwise or counterclockwise.

[0038] S3. According to the welding wire material used...

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Abstract

The invention relates to a mixed fill path generation method in an arc fuse additive manufacturing technology. The method comprises the following steps of: traversing data points of a section edge profile and a cavity area edge profile, and deleting collinear points on the profiles; sorting the data points on the profiles in a clockwise or counter-clockwise direction; setting a distance of profileoffset; taking a section edge as an outer profile and taking a cavity area edge as an inner profile; distinguishing and judging the inner profile and the outer profile; gradually offsetting the outerprofile inwards and gradually offsetting the inner profile outwards, and stopping the offset when the two profiles are intersected; solving a blank area between the innermost outer profile and the outermost inner profile according to the intersection point; and filling the blank area by using a reciprocating straight line. According to the method, a mixed fill path is adopted, so that complex areas with cavities can be filled, outer surface quality of parts is ensured, the frequencies of arcing and arc striking and idle strokes of welding guns are decreased, and the algorithm execution efficiency is improved.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a method for generating a mixed filling path in an arc fuse additive manufacturing technology. Background technique [0002] The general process of arc fuse additive manufacturing is: first obtain a 3D model through 3D solid scanning or direct modeling, then slice the 3D model into layers with a certain thickness through software, and then melt the metal wire or metal powder by the welding arc, Layer by layer from bottom to top according to the established forming path to form dense three-dimensional parts. [0003] With the continuous deepening of the research and application of arc fuse additive manufacturing, the software is more and more important to the trajectory planning of the three-dimensional model section. The planning strategy of the section scanning path will have a great impact on the speed and quality of the forming. A reasonable path It can reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 秦训鹏方力侯智文胡泽启李轶峰邵坦
Owner WUHAN UNIV OF TECH
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