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A Pseudorandom Island Scanning Path Planning Method Based on Quadrant Region Guidance

A scanning path, pseudo-random technology, applied in the field of additive manufacturing, can solve the problem of inability to effectively manage and control input heat

Active Publication Date: 2019-01-18
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a pseudo-random island-type scanning path planning method based on quadrant area guidance, which can overcome the problem that the input heat cannot be effectively managed and controlled during high-energy beam laser processing

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  • A Pseudorandom Island Scanning Path Planning Method Based on Quadrant Region Guidance
  • A Pseudorandom Island Scanning Path Planning Method Based on Quadrant Region Guidance

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Embodiment Construction

[0027] combine figure 1 , a pseudo-random island scanning path planning method based on quadrant area guidance, including the following steps:

[0028] Step 1, establish a Cartesian coordinate system and place the slice in the Cartesian coordinate system to obtain the slice contour coordinate information and obtain the slice contour bounding box, where the boundary of the bounding box is defined by the maximum and minimum values ​​of the slice contour in the Cartesian coordinate system on the x and y axes Composed of straight lines parallel to the x and y axes;

[0029] Step 2, arrange square grids to cover the bounding box, and the set of square grids is denoted as {S ij} p×q , where p and q are the number of rows and columns of the square grid respectively, i∈p, j∈q;

[0030] Step 3, the collection {S ij} p×q The grids in the slice contour are performed with the Boolean intersection operation one by one to obtain the discrete slice set {C1 ij} p×q ;

[0031] Step 4, ...

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Abstract

The invention provides a pseudo-random island scanning path planning method based on quadrant area guidance. The method includes the following steps: step 1, calculating and obtaining the contour bounding box of the slice according to the input 3D model slice data; step 2, arranging square grids according to the slice contour bounding box obtained in step 1, and the set of square grids is denoted as {Sij} p×q; Step 3, perform Boolean intersection operation on the grids in the set {Sij}p×q one by one with the input grid and the input slice contour to obtain the discrete slice set {C1ij}p×q; Step 4, filter out { The empty slices in C1ij}p×q get the set {C2ij}p×q; Step 5, for {C2ij}p×q, define a pseudo-random island-shaped loading strategy based on quadrant region guidance, and obtain the final slice set {Cij} p×q; step 6, traverse the set {Cij}p×q, find the internal scan filling path for each discrete slice, and obtain the lattice path set {Pij}p×q.

Description

technical field [0001] The invention designs a technical field of additive manufacturing, in particular a pseudo-random island scanning path planning method based on quadrant region guidance. Background technique [0002] The mechanism of laser selective melting technology is nothing more than the interaction between the high-energy laser beam and the powder material, that is, the mechanism and mechanism of energy absorption and transmission range control during the forming process. However, for the laser selective melting technology, the heat generated by the powder during the rapid melting and solidification process and its transfer and transfer have a significant impact on the formability, residual stress and deformation. Therefore, a reasonable laser scanning path is an effective management and control of heat, which can largely avoid excessive deformation of parts. [0003] At present, the additive manufacturing technology adopts four scanning path generation methods f...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B33Y10/00B33Y50/02
CPCB33Y10/00B33Y50/02B22F10/00B22F10/28B22F10/366Y02P10/25
Inventor 张长东强旭辉刘婷婷石立韩邢峰廖文和
Owner NANJING UNIV OF SCI & TECH
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