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Automatic trajectory planning method and system for multi-layer and multi-channel wire arc additives of metal structure

A multi-layer, multi-pass, metal structure technology, applied in the field of additive manufacturing, can solve the problems of complex metal parts with many structural features, low forming accuracy of the side walls of the parts, and inconsistent height of the arc end position, so as to shorten the development cycle and reduce the number of layers. The effect of eliminating defects and improving mechanical properties

Active Publication Date: 2021-05-28
NANJING ENIGMA IND AUTOMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The formed parts of arc additive manufacturing are composed of full weld metal. The existing multi-layer and multi-pass arc additive technology has the following problems: the arc additive manufacturing process starts Inconsistency in the height of the arc closing position will cause the arc crater to collapse; there are many structural features of complex metal parts, and the height inconsistency will appear in the printing process; the heat input in the arc additive manufacturing process is large, and the liquid molten pool is very easy to Flowing to both sides of the melting channel will cause low forming accuracy of the side wall of the part

Method used

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  • Automatic trajectory planning method and system for multi-layer and multi-channel wire arc additives of metal structure
  • Automatic trajectory planning method and system for multi-layer and multi-channel wire arc additives of metal structure
  • Automatic trajectory planning method and system for multi-layer and multi-channel wire arc additives of metal structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131]Example 1: Connecting frame multi - layer multi-channel arc additive manufacturing

[0132]Such asFigure 5 As shown, the connecting frame generates an outer wall + short straight filling + layered multi-layer multi-channel arc adder path according to the method of the present invention, and the desired process parameters are calculated. Made of a multilayer multilayer multilayer arc gauge method according to the present invention. Specifically:

[0133]The selected substrate has a 6061 aluminum alloy sheet having a thickness of 20 mm. The welding wire is used as a diameter of 1.2 mm 4043 aluminum alloy wire, which will be placed flattened by the acid washing substrate and wipe it with anhydrous ethanol or acetone. The cleaner is fixed on the welding workbench. The substrate level.

[0134]The STL model is processed by a STL slice algorithm based on triangular segment geometry, thereby calculating the outer wall + short filling + hierarchy to print paths, such asFigure 5 Indicated.

[0135...

Embodiment 2

[0136]Example 2: Square case multilayer multi-channel arc additive manufacturing

[0137]Such asFigure 6 As shown, the square case is generated in accordance with the method of the present invention to generate an outer wall + short straight filling + layered multi-layer multi-channel arc adder path, and by calculation of the desired process parameters. Made of a multilayer multilayer multilayer arc gauge method according to the present invention. Specifically:

[0138]Printing the selected substrate thickness of a Q235 carbon steel aluminum plate material, the welding wire is a diameter of 1.2 mm 308 stainless steel wire, which will be placed flat and wiped with anhydrous ethanol or acetone to wipe the clean after the welding workbench. The substrate level.

[0139]The STL model is processed by a STL slice algorithm based on triangular segment geometry, thereby calculating the outer wall + short filling + hierarchy to print paths, such asFigure 6 Indicated.

[0140]The amount of thermal input ...

Embodiment 3

[0141]Example 3: Strengthening the multilayer of multi - layer arc gauge manufacture

[0142]Such asFigure 7 As shown, the reinforcing ring ring is generated in accordance with the method of the present invention to generate an outer wall + short straight filling + layered multi-layer multi-channel arc adder path, and by calculating the required process parameters. Made of a multilayer multilayer multilayer arc gauge method according to the present invention. Specifically:

[0143]Print selected substrate thickness is 16mm6061 aluminum alloy plate, the welding wire is a diameter of 1.2 mm 4043 aluminum alloy welding wire, which will be grounded flat and wiped with anhydrous ethanol or acetone to securely fix it on the welding table to ensure the substrate level .

[0144]The STL model is processed by a STL slice algorithm based on triangular segment geometry, thereby calculating the outer wall + short filling + hierarchy to print paths, such asFigure 7 Indicated.

[0145]The thermal input is ca...

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Abstract

The invention provides an automatic trajectory planning method and system for multi-layer and multi-channel wire arc additives of a metal structure. The automatic trajectory planning method comprises the following steps: Step 1, conducting layered slicing treatment on a model of a printed workpiece; Step 2, after obtaining a layered relation matrix, calculating a contour line according to triangles recorded in the matrix by means of a topological relation; Step 3, calculating filling line segments; Step 4, sorting all the intersection points obtained in the Step 3 according to the size of the X coordinate; Step 5, connecting the filling line segments; and Step 6, carrying out layered direction-changing scanning. Multi-layer and multi-channel 3D printing of a metal structural part is carried out according to the composite printing path of outer wall + short straight line filling + layered direction-changing filling, chemical components of a formed workpiece are uniform, the purity is high, and the structure is almost free of anisotropy. Multi-layer and multi-channel 3D printing of the metal structural part is carried out according to the composite printing path of outer wall + short straight line filling + layered direction-changing filling, the grain size of the formed workpiece is small and uniform, the mechanical performance is high, and the level of the formed workpiece can exceed that of a casting with the same component.

Description

Technical field[0001]The present invention relates to a multilayer multilayer multi-channel arc pushing material for metal structures and systems involving additive manufacturing.Background technique[0002]Wire Arc Additive Manufacture (WAAM) is an arc or plasma arc as a heat source to melt metal wire, using a layer-by-layer cladding principle under program or software control, according to the three-dimensional digital model by line - surface Advanced Digital Manufacturing Technology for 3D Metal Blairs that close to the product shape and size requirements. The arc additive manufacturing technology has the advantages of low manufacturing cost, high material utilization, high production efficiency. In recent years, multi-layer multi-channel printing has been widely concerned by multi-layer multi-channel printing in multi-layer multi-channel printing. It has been widely concerned with high-profile precision.[0003]The shaped parts made of arc adding materials are composed of full weld ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/366B22F10/85B33Y50/02
CPCB33Y50/02Y02P10/25
Inventor 董巍汤洪淝程远
Owner NANJING ENIGMA IND AUTOMATION TECH CO LTD
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