Control information generation device and control information generation method for controlling an additive manufacturing apparatus using bead width correction

Patent metadata

Field	Value
Publication number	US-11480947-B2
Application number	US-201917604771-A
Country	US
Kind code	B2
Filing date	Jun 14, 2019
Priority date	Jun 14, 2019
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A control information generation device generates control information for controlling an additive manufacturing apparatus that manufactures a layer shape using a bead that is a manufactured object formed by adding a molten processing material to a target surface while moving a processing position along a manufacturing path, and manufactures a three-dimensional shape in which the layer shapes are stacked. The device includes: a bead width correction unit that obtains a corrected width on the basis of the manufacturing path and a reference width of a cross section of the bead, the corrected width being a width of the cross section for allowing the beads to be adjacent to each other without overlapping; a path correction unit that obtains a corrected path on the basis of the manufacturing path and the corrected width; and a control information output unit that outputs control information indicating the corrected path and the corrected width.

First claim

The invention claimed is:

1. A control information generation device that generates control information for controlling an additive manufacturing apparatus that manufactures a layer shape using a bead that is a manufactured object formed by adding a molten processing material to a target surface while moving a processing position along a manufacturing path, and manufactures a three-dimensional shape in which the layer shapes are stacked, the control information generation device comprising:
bead width correction circuitry to obtain a corrected width on the basis of the manufacturing path and a reference width of a cross section of the bead, the corrected width being a width of the cross section for allowing the beads to be adjacent to each other without overlapping, and the bead width correction circuitry sets the corrected width of a corner portion of the manufacturing path at an exterior corner of the layer shape to be smaller than the reference width;
path correction circuitry to obtain a corrected path on the basis of the manufacturing path and the corrected width; and
control information output circuitry configured to output control information indicating the corrected path and the corrected width to control the additive manufacturing apparatus that manufactures the layer shape to manufacture the three-dimensional shape in which the layer shapes are stacked.

2. The control information generation device according to claim 1 , wherein the path correction circuitry obtains the corrected path on the basis of allowing a target path included in the manufacturing path and an adjacent path adjacent to the target path to share manufacturing.

3. The control information generation device according to claim 1 , wherein
the path correction circuitry obtains the corrected path that goes around the outside of the corner portion.

4. The control information generation device according to claim 1 , wherein the bead width correction circuitry obtains the corrected width on the basis of a curvature of the manufacturing path.

5. The control information generation device according to claim 4 , wherein the bead width correction circuitry sets the corrected width to be smaller as the curvature is larger.

6. The control information generation device according to claim 2 , wherein the path correction circuitry adjusts the corrected path on the basis of a manufacturing order of the target path and the adjacent path.

7. The control information generation device according to claim 1 , further comprising
bead height calculation circuitry to obtain an average height of the cross section of the bead on the basis of the corrected path, the corrected width, and the layer shape, wherein
the control information output circuitry outputs the control information further indicating the average height.

8. The control information generation device according to claim 7 , further comprising
point manufacturing path conversion circuitry to convert the corrected path into a point manufacturing path represented by discrete points on the corrected path, wherein
the point manufacturing path conversion circuitry determines an interval of the discrete points on the basis of the corrected width.

9. A control information generation method that generates control information for controlling an additive manufacturing apparatus that manufactures a layer shape using a bead that is a manufactured object formed by adding a molten processing material to a target surface while moving a processing position along a manufacturing path, and manufactures a three-dimensional shape in which the layer shapes are stacked, the control information generation method comprising:
obtaining by, a control information generation device that generates the control information, a corrected width on the basis of the manufacturing path and a reference width of a cross section of the bead, the corrected width being a width of the cross section for allowing the beads to be adjacent to each other without overlapping;
setting the corrected width of a corner portion of the manufacturing path at an exterior corner of the layer shape to be smaller than the reference width;
obtaining by, the control information generation device, a corrected path on the basis of the manufacturing path and the corrected width; and
outputting by, the control information generation device, control information indicating the corrected path and the corrected width to control the additive manufacturing apparatus that manufactures the layer shape to manufacture the three-dimensional shape in which the layer shapes are stacked.

Assignees

• Mitsubishi Electric Corp

Inventors

• Iriguchi Kenji
• Shinohara Nobuhiro
• Morita Daiji
• Sumi Nobuyuki
• Kayashima Shun

Classifications

• G05B19/41815 Primary

  characterised by the cooperation between machine tools, manipulators and conveyor or other workpiece supply system, workcell · CPC title

• B33Y50/02 Primary

  for controlling or regulating additive manufacturing processes · CPC title

• B29C64/118

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title

• B23K26/342

  Build-up welding · CPC title

• B23K15/0086

  welding for purposes other than joining, e.g. build-up welding · CPC title