Arc additive manufacturing method for partitioned printing and filling of reinforcing rib metal structural parts

A technology of metal structural parts and additive manufacturing, which is applied in the field of additive manufacturing, can solve problems such as large differences in shape and size between ribs and base, uncontrollable filling path sequence, and concentrated heat input, so as to shorten the development cycle and improve 3D printing speed, the effect of improving efficiency

Active Publication Date: 2022-07-26
NANJING ENIGMA IND AUTOMATION TECH CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The shape and size of the rib and the matrix of the existing rib metal structural parts are very different. If the arc additive manufacturing technology is used for overall printing, the matrix and the rib are filled in the same way, and there will be defects such as infusion and collapse.
Moreover, the overall printing cannot control the filling path sequence, and there are problems such as concentrated heat input, severe deformation, and low dimensional accuracy.

Method used

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  • Arc additive manufacturing method for partitioned printing and filling of reinforcing rib metal structural parts
  • Arc additive manufacturing method for partitioned printing and filling of reinforcing rib metal structural parts
  • Arc additive manufacturing method for partitioned printing and filling of reinforcing rib metal structural parts

Examples

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Embodiment 1

[0098] Example 1: 4043 Aluminum Alloy Reinforced Metal Structural Parts Filled Arc Additive Manufacturing

[0099] like Image 6 As shown in the figure, the height of the aluminum alloy structure is 200mm, and the number of layered slices is 134, so the height of each layer of welding seam is 1.5mm. It is manufactured by partitioned filling arc additive manufacturing of a reinforcing rib metal structure according to the present invention. Specifically:

[0100] To print a 6061 aluminum alloy substrate with a thickness of 20mm, the welding wire used is 4043 aluminum alloy wire with a diameter of 1.2mm. First, calculate the heat input through the optimal temperature required for workpiece forming, so as to obtain a set of suitable forming process parameters: select The welding process is CMT+P, the welding current is 110A, the wire feeding speed is 5.8m / min, the welding speed is 10mm / s, the shielding gas is Arcal1 (99.9995%Ar), and the gas flow rate is 18L / min. Due to the good...

Embodiment 2

[0101] Example 2: 316L stainless steel reinforcing rib metal structural parts filled arc additive manufacturing

[0102] like Figure 7 As shown in the figure, the height of the stainless steel structure is 200mm, and the number of layered slices is 112, so the height of each layer of welding seam is 1.8mm. It is manufactured by partitioned filling arc additive manufacturing of a reinforcing rib metal structure according to the present invention. Specifically:

[0103] To print a Q235 carbon steel substrate with a thickness of 20mm, the welding wire used is 316Lb stainless steel wire with a diameter of 1.2mm. First, calculate the heat input through the optimum temperature required for workpiece forming, so as to obtain a set of suitable forming process parameters: Selective welding The process is CMT+P, the welding current is 152A, the wire feeding speed is 4.8m / min, the welding speed is 10mm / s, and the shielding gas is Arcal12 (98%Ar+2%CO). 2 ), the gas flow rate is 15L / mi...

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Abstract

An arc additive manufacturing method for partitioned filling of reinforcing rib metal structures. A welding machine is used as a heat source and a metal wire is used as a forming material, and partitioned filling paths are sequentially planned for cladding printing; Welding wire and substrate; 2) Slice the formed metal structural part model in layers, and divide the two-dimensional contour according to the characteristics of the metal structural part; 3) Carry out path planning for each partition; 4) The welding gun is driven by the robot to generate partition path motion. The invention proposes a sub-area filling arc additive manufacturing method for reinforcing rib metal structural parts, and independently develops a sub-area filling path; the welding torch is driven by a robot to perform 3D printing according to the generated sub-area filling diameter, and the entire printing process balances the heat input of each sub-area, extremely The deformation of parts is greatly reduced, and the digitization, intelligence and parallelization of parts manufacturing are realized.

Description

technical field [0001] The invention relates to an arc additive (manufacturing) method for partitioned printing of reinforcing rib metal structural parts, belonging to the field of additive manufacturing. Background technique [0002] Additive Manufacturing (AM) is also known as "entity free manufacturing", "3D printing technology", etc. Compared with traditional subtractive manufacturing (cutting) technology, it is a "bottom-up" The manufacturing method of material accumulation is an emerging manufacturing technology based on mathematical modeling and the principle of discrete-accumulation, which accumulates materials layer by layer to produce solid parts. After nearly a century of development, additive manufacturing technology has achieved rapid manufacturing of organic materials, inorganic non-metallic materials, and metal material products. For metal materials, the additive manufacturing technology is classified according to the heat source, which can be divided into: l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/04B33Y30/00
CPCB23K9/04B33Y30/00
Inventor 董巍程远胡冬双
Owner NANJING ENIGMA IND AUTOMATION TECH CO LTD
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