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Arc additive manufacturing method for partition printing and filling of reinforcing rib metal structural part

A technology of metal structural parts and additive manufacturing, which is applied in the field of additive manufacturing, can solve the problems of large differences in shape and size between ribs and substrates, 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: 2022-01-11
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 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 partition printing and filling of reinforcing rib metal structural part
  • Arc additive manufacturing method for partition printing and filling of reinforcing rib metal structural part
  • Arc additive manufacturing method for partition printing and filling of reinforcing rib metal structural part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Example 1: Additive manufacturing of 4043 aluminum alloy reinforced rib metal structural parts filled with arc

[0099] like Image 6 As shown, the height of the aluminum alloy structural part is 200mm, and the number of layered slices is 134 layers, so the weld height of each layer is 1.5mm. It adopts a metal structure with reinforcing ribs described in the present invention to be manufactured by subarea filling arc additive. Specifically:

[0100] Print the selected 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 ...

Embodiment 2

[0101] Example 2: Additive manufacturing of 316L stainless steel ribbed metal structural parts filled with arc

[0102] like Figure 7 As shown, the height of the stainless steel structural part is 200mm, and the number of layers of sliced ​​slices is 112, so the height of the weld of each layer is 1.8mm. It adopts a metal structure with reinforcing ribs described in the present invention to be manufactured by subarea filling arc additive. Specifically:

[0103] Print the selected 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 optimal 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 / min...

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Abstract

According to an arc additive manufacturing method for partition printing and filling of a reinforcing rib metal structural part, a welding machine serves as a heat source, a metal wire serves as a forming material, and partition filling paths are sequentially planned for cladding printing. The method comprises the following steps: 1) selecting a welding wire and a substrate required by a specific formed metal structural part; 2) layering and slicing a formed metal structural part model, and partitioning the two-dimensional contour according to the characteristics of the metal structural part; 3) performing path planning on each partition; and 4) driving a welding gun by a robot to move according to the generated partition path. The invention provides a partition filling electric arc additive manufacturing method for a reinforcing rib metal structural part. A partition filling path is developed autonomously; the welding gun is driven by the robot to conduct 3D printing according to the generated partition filling diameter, the heat input amount of all the sub-partitions is balanced in the whole printing process, part deformation is reduced to a great extent, and digitization, intellectualization and parallelization of part manufacturing are achieved.

Description

technical field [0001] The invention relates to an arc additive material (manufacturing) method for regional printing of reinforcing rib metal structural parts, which belongs to the field of additive manufacturing. Background technique [0002] Additive Manufacturing technology (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 based on mathematical modeling and based on the principle of discrete accumulation, which is an emerging manufacturing technology that accumulates materials layer by layer to produce solid parts. After nearly a century of development, additive manufacturing technology has realized the rapid manufacturing of organic materials, inorganic non-metallic materials, and metal material products. For metal materials, the additive manufacturing technology is cla...

Claims

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Application Information

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Patent Type & Authority Applications(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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