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Material increase manufacturing method for titanium alloy shape part by using double-arc hybrid heat source

A compound heat source and additive manufacturing technology, which is applied in the direction of manufacturing tools, arc welding equipment, metal processing equipment, etc., can solve the problems of low efficiency of additive manufacturing, achieve fast heat source operation speed, high metal deposition rate, and avoid overheating Effect

Inactive Publication Date: 2016-04-06
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The purpose of the present invention is to address the problems and deficiencies in the prior art, and to provide a double-arc compound heat source wire-feeding additive manufacturing method for titanium alloy shaped parts, aiming at increasing the amount of metal without increasing the heat input of shaped parts. Deposition rate and welding speed improve the efficiency of titanium alloy wire feeding additive manufacturing, and solve the problem of low efficiency of traditional TIG arc wire feeding additive manufacturing
Therefore, this process can improve the deposition rate and welding speed of the titanium alloy wire welding wire by increasing the current, and at the same time avoid the overheating of the titanium alloy material, thereby overcoming the slow moving speed of the welding torch during TIG arc wire feeding additive manufacturing. Low problem, improved production efficiency

Method used

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  • Material increase manufacturing method for titanium alloy shape part by using double-arc hybrid heat source
  • Material increase manufacturing method for titanium alloy shape part by using double-arc hybrid heat source
  • Material increase manufacturing method for titanium alloy shape part by using double-arc hybrid heat source

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Experimental program
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Effect test

Embodiment 1

[0045] Such as figure 2 As shown in (a) and (b), the titanium alloy shaped part 9 has a height H of 120 mm and a width W of 20 mm. It is formed by 100 layers of surfacing, each layer of surfacing is 1.2 mm high, and each layer is 13 layers of surfacing welding. Welding process platform: Fronius digital MIG welding machine and Panasonic TIG welding machine form a composite heat source welding device. MIG welding torch 1 is in front and TIG welding torch 3 is in the back; TC4 welding wire 2 with a diameter of 1.2mm is used, and TC4 titanium alloy is selected as the substrate 8. The specific steps are as follows:

[0046] (1) Pre-ventilate at the arc starting position of the substrate for 5s, first start MIG welding, then start TIG welding, wait for 1-2s, and then perform the first layer of first surfacing welding after the arc is stable.

[0047] (2) After the first surfacing welding is completed, turn the composite welding torch 180°, then move it sideways by 1.5mm, reverse t...

Embodiment 2

[0053] Such as figure 2 As shown in (a) and (b), the titanium alloy shaped part 9 has a height H of 100 mm and a width W of 15 mm. It is formed of 100 layers of surfacing, each layer of surfacing is 1.0 mm high, and each layer is 10 layers of surfacing welding. Welding process platform: Fronius digital MIG welding machine and Panasonic TIG welding machine form a composite heat source welding device. MIG welding torch 1 is in front and TIG welding torch 3 is in the back; TC1 welding wire 2 with a diameter of 1.2mm is used, and TC1 titanium alloy is selected as the substrate 8 . The specific steps are as follows:

[0054] (1) Pre-ventilate at the arc starting position of the base plate 8 for 5 seconds, start MIG welding, and then start TIG welding. After 1-2 seconds, the arc is stable and the first layer of first surfacing welding is performed.

[0055] (2) After the first surfacing welding is completed, turn the composite welding torch 180°, then move it sideways by 1.5mm, re...

Embodiment 3

[0061] Such as image 3 As shown in (a) and (b), the titanium alloy shape 9 has a height of 250mm, an inner diameter and an outer diameter of 200mm and 260mm respectively, and is formed by 100 layers of surfacing, each layer of surfacing is 2.5mm high, and each layer has 15 layers Overlay welding. Welding process platform: Fronius digital MIG welding machine and Panasonic TIG welding machine form a composite heat source welding device, MIG welding torch 1 is in front, and TIG welding torch 3 is in the back; TC4 welding wire 2 with a diameter of 1.6mm is used, and TC4 titanium alloy is selected as the substrate 8; welding During the process, the substrate is fixed on the positioner, only the positioner rotates, and the welding torch is fixed and only moves sideways. The specific steps are as follows:

[0062] (1) Pre-ventilate at the arc starting position of base plate 8 for 6 seconds, start MIG welding first, and then start TIG welding. After 1-2 seconds, after the arc is st...

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Abstract

The invention relates to a material increase manufacturing method for a titanium alloy shape part by using a double-arc hybrid heat source. The method comprises the following steps: MIG welding and TIG welding are originally combed, a welding wire as a melting electrode is sent out by an MIG welding gun and is subjected to surfacing on a base plate; an MIG power anode is connected with a TIG power anode, and an MIG power cathode is connected with the base plate, the MIG welding gun is connected with the MIG power anode, and a TIG welding gun is connected with a TIG power cathode; the MIG welding gun is in the front, and the TIG welding gun is in the back; the current of the welding wire is shunted through a TIG welding circuit, so that the current passing through the welding wire is large, and the current passing through a weldment is small. After the base plate completes a first surfacing layer, a hybrid welding gun is increased by a story height, and a second layer of shape part is welded; the above process is repeated, so that the titanium alloy shape part is formed by overlaying plurality of surfacing layer. The method has the advantages of being high in metal deposition rate, high in welding speed, less in weldment heat input, good in structural and mechanical properties of the shape part and low in cost and solves the problems of lager heat input, low welding speed, poor welding quality and low efficiency during material increase manufacturing of the traditional titanium alloy single TIG arc wire feeding.

Description

technical field [0001] The invention belongs to the technical field of rapid prototyping, and in particular relates to a method for additive manufacturing of a titanium alloy shape with a double-arc composite heat source. Background technique [0002] Titanium alloys are widely used in the aerospace field due to their unique comprehensive properties. Additive manufacturing technology has also become an important means of rapid prototyping of titanium alloys. For titanium alloy products, laser powder additive manufacturing technology is currently mainly used for rapid prototyping, and wire feeding additive manufacturing technology has high metal deposition efficiency, high material utilization, and no smoke pollution, which has attracted more and more attention. In order to avoid problems such as jacking wires and sticking wires, a single TIG arc is currently used as a heat source to melt titanium alloy wires. For example, the invention named "A Method for Arc Additive Manuf...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/173B23K9/04
CPCB23K9/167B23K9/04B23K9/173B23K2103/14
Inventor 胥国祥胡庆贤刘文刘彬王俭辛
Owner JIANGSU UNIV OF SCI & TECH
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