Fusion penetration method for arc wire filling additive manufacturing root zone of thick-wall structural element

A technology of additive manufacturing and wall structure, applied in the direction of manufacturing tools, arc welding equipment, electrode support devices, etc., can solve the problems of small melting area and low metallurgical bonding strength between layers, so as to avoid excessive remelting and eliminate hole defects , to achieve the effect of effective use

Inactive Publication Date: 2017-06-09
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low interlayer metallurgical bonding strength caused by the root area of ​​the arc-filled wire additive manufacturing of th

Method used

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  • Fusion penetration method for arc wire filling additive manufacturing root zone of thick-wall structural element
  • Fusion penetration method for arc wire filling additive manufacturing root zone of thick-wall structural element
  • Fusion penetration method for arc wire filling additive manufacturing root zone of thick-wall structural element

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Effect test

Embodiment 1

[0051] The thick-walled structural part formed in this embodiment has a structure of 20 layers and 5 layers, that is, the number of forming layers is 20 layers, 5 layers are formed on each layer, the forming path is a straight line, and the forming length of each layer is 150 mm. The arc-filling additive manufacturing test platform is: the arc additive manufacturing power supply is the gas-shielded Fronius TPS4000 welding machine, the gas-shielded welding torch is installed on the end of the sixth axis of the ABB six-axis robot, and the movement and posture of the welding torch are controlled by the robot Adjustment. Additive manufacturing process parameters are: forming current 150A, arc voltage 20V, welding torch walking speed 5mm / s, forming shielding gas 95% Ar+5% CO 2 , the gas flow rate is 18L / min, the filler wire is H08Mn2Si low-carbon steel wire, the wire diameter is 1.2mm, the substrate is Q235 low-carbon steel plate, and the substrate size is 200mm×150mm×10mm.

[005...

Embodiment 2

[0060] The thick-walled structural part formed in this embodiment has a structure of 30 layers and 3 layers, that is, the number of forming layers is 30 layers, 3 layers are formed on each layer, the forming path is a straight line, and the forming length of each layer is 160 mm. The arc-filling additive manufacturing test platform is: the arc additive manufacturing power supply is a MagicWave 3000 welding machine, the argon tungsten arc welding torch is installed on the end of the sixth axis of the ABB six-axis robot, and the movement and attitude adjustment of the welding torch are controlled by the robot. Additive manufacturing process parameters are: forming current 110A, arc voltage 19V, welding torch walking speed 3mm / s, wire feeding speed 0.8m / min, forming shielding gas 95% Ar+5% CO 2 , the gas flow rate is 18L / min, the filler wire is H08Mn2Si low-carbon steel wire, the wire diameter is 1.2mm, the substrate is Q235 low-carbon steel plate, and the substrate size is 200mm×...

Embodiment 3

[0067] The thick-walled structural part formed in this embodiment has a structure of 25 layers and 8 layers, that is, the number of forming layers is 25 layers, 8 layers are formed on each layer, the forming path is a closed ring, and the circumference length of each layer is 200mm. The arc-filling additive manufacturing test platform is: the arc additive manufacturing power supply is the gas-shielded Fronius TPS4000 welding machine, the gas-shielded welding torch is installed on the end of the sixth axis of the ABB six-axis robot, and the movement and posture of the welding torch are controlled by the robot Adjustment. The process parameters of additive manufacturing are: forming current 260A, arc voltage 26V, welding torch walking speed 12mm / s, forming shielding gas 95% Ar+5% CO 2 , the gas flow rate is 18L / min, the filler wire is H08Mn2Si low-carbon steel wire, the wire diameter is 1.2mm, the substrate is Q235 low-carbon steel plate, and the substrate size is 200mm×150mm×10...

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Abstract

The invention provides a fusion penetration method for an arc wire filling additive manufacturing root zone of a thick-wall structural element. The thick-wall structural element is of a multi-layer structure of two or more layers; each layer is composed of at least two accumulating ways; a multi-layer and multi-way structure is formed through an arc wire filling additive manufacturing method; each layer sheet is formed by means of mutual overlap joint of at least two accumulating ways; the first accumulating way of each layer sheet is formed in the manner that a welding gun is perpendicular to a substrate; the other accumulating ways are formed in the manner that the axis of the welding gun and the surface of the substrate form a 65-85 degree angle; and the axis of the welding gun points to the root zone so that the maximum arc force can directly act on the root zone. The method can guarantee good fusion penetration of the root zone, eliminate the hole defect of the root zone and achieve good metallurgical connection of the root zone, a front-way re-fusion zone and a front-layer re-fusion zone; and meanwhile fusion on the front-layer re-fusion zone can be reduced, excessive re-fusion on the front-layer re-fusion zone is avoided, and effective utilization of the arc energy in the arc wire filling additive manufacturing process of the thick-wall structural element is further achieved.

Description

technical field [0001] The invention belongs to the technical field of arc-filled wire-added material manufacturing, and in particular relates to a root zone penetration method for arc-filled wire-added material-manufactured of thick-walled structural parts. Background technique [0002] Arc wire-filling additive manufacturing is a low-cost metal component additive manufacturing method. This technology is suitable for the forming of large-scale metal components. It uses arcs as heat sources and metal wires as filling materials, layer by layer according to the set forming path Form and fabricate metal components. Generally, formed metal components have the advantages of good structural properties, excellent mechanical properties, and good interlayer bonding properties. [0003] In the arc-filled wire additive manufacturing of thick-walled structural parts, it is inevitable to form multi-layer and multi-channel structures. When forming a multi-layer multi-lane structure, at ...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/10B23K9/28
CPCB23K9/04B23K9/1012B23K9/28
Inventor 熊俊李蓉李沿江陈辉
Owner SOUTHWEST JIAOTONG UNIV
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