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Arc fuse additive manufacturing method for porous materials

A technology of additive manufacturing and porous materials, applied in the field of additive manufacturing, can solve the problems of high printing accuracy, long printing time per unit price, and low efficiency of the manufacturing process, and achieve the effect of high-efficiency preparation

Active Publication Date: 2020-07-14
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the technical problems of low manufacturing process efficiency and long printing time per unit price caused by the high printing accuracy requirements mentioned above, a method for arc fuse additive manufacturing of porous materials is provided

Method used

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  • Arc fuse additive manufacturing method for porous materials

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Experimental program
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Effect test

Embodiment 1

[0032] Adopting the method of the present invention to carry out arc fuse additive manufacturing of porous materials to carbon steel, the preparation method comprises the following steps:

[0033] Gas metal shielded welding torch is used for fuse additive accumulation, in which the welding torch is placed vertically, the dry elongation is 15mm, and the diameter of welding wire is 1.2mm; the auxiliary arc adopts tungsten argon arc welding torch, and the angle between the welding torch and the melting electrode is 45°, and the current 100A, 0.05mm pure iron foil is used to separate the layers; by adjusting the current of the gas metal arc welding torch and the speed of the torch, porous materials with different hole sizes can be obtained, such as figure 1 shown.

Embodiment 2

[0035] Using the method of the present invention to carry out arc fuse additive manufacturing of porous materials on 6061 aluminum alloy, the preparation method comprises the following steps:

[0036] Use MIGA welding torch for fuse additive accumulation, where the welding torch is placed vertically, the dry elongation is 12mm, the welding wire diameter is 1.2mm, and the layers are separated by 0.02mm pure aluminum foil; the atomizing water vapor device is placed at the front of the welding torch, so that the arc is located In the range of water vapor, aluminum alloy porous materials with different pore sizes can be obtained by adjusting the current of the gas metal arc welding torch and the walking speed of the torch.

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Abstract

The invention provides an arc fuse wire additive manufacturing method for a porous material. By taking a single arc or multiple heat sources as the heat source of fuse wire additive manufacturing, molten drops are transited in an unstable form by adjusting parameters such as arc height, angle, current and voltage in a stacking process and applying prearranged gas to interfere the arc shape and themolten drop shape, so that the molten drops entering a bath splash so as to from a metal structure comprising a lot of fixed dimensional holes. The hole dimension can be designed by controlling the arc parameters. Software and a numerically controlled system are processed according to a predetermined path to manufacture a porous material structural part of a special shape. The method can preparethe porous material efficiently by regulating the arc.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, in particular to an arc fuse additive manufacturing method for porous materials. Background technique [0002] A solid with a certain number of pores is called a porous material, which is a material with a network structure of interconnected or closed pores, and the boundaries or surfaces of the pores are composed of pillars or plates. Porous materials can improve mechanical properties such as strength and stiffness while reducing density, and have certain advantages in aerospace and aviation industries. According to calculations, if the aircraft is replaced with porous materials, the weight of the aircraft will be reduced to half of the original under the same performance conditions. Another change in the mechanical properties of porous materials is the improvement of impact toughness, which can effectively reduce the damage created by traffic accidents to passengers when used in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/11B33Y10/00
CPCB22F3/11B33Y10/00
Inventor 任大鑫刘黎明赵坤民宋刚常颖张兆栋
Owner DALIAN UNIV OF TECH
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