Manufacturing method for GTAW double-synchronization filler rod additive of non-closed thin-wall structural member

A technology of thin-walled structural parts and additive manufacturing, which is applied in the field of additive manufacturing, can solve the problems that the quality control of non-closed path structural parts is not yet feasible, the forming process cannot continue, and the size difference of formed components increases. Effects of improving build-up forming quality, shortening additive manufacturing cycle, and increasing cooling rate

Inactive Publication Date: 2016-12-21
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rear wire feeding method refers to the direction along the stacking path. The wire feeding system is installed behind the GTAW welding torch, and the wire is directly sent into the molten pool, and the wire feeding speed is greatly limited.
[0005] In the additive manufacturing of non-closed structural parts, if they are always stacked in the same direction, the size difference between the two ends of the formed part will gradually increase, so that the forming process c...

Method used

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  • Manufacturing method for GTAW double-synchronization filler rod additive of non-closed thin-wall structural member

Examples

Experimental program
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Embodiment 1

[0032] combine figure 1 Describe this embodiment, a non-closed thin-walled structural part GTAW double synchronous wire-filling additive manufacturing method described in this embodiment, the non-closed thin-walled structural part is a multi-layer single-channel structural part that is not connected from end to end, Described method is realized through the following steps:

[0033] Step 1: Install the copper alloy wire guide tubes 5 and 4 symmetrically on the left and right sides of the GTAW welding torch 2 respectively, and the angle β between the wire guide tube and the welding torch is 35°.

[0034]Step 2: Grinding the surface of the substrate 1 before stacking, and then using acetone to remove oil stains on the surface of the substrate 1, and fixing the cleaned substrate 1 on a fixture for additive manufacturing. The GTAW welding torch 2 is moved above the substrate so that the tip of the tungsten pole is 2mm away from the substrate surface, and the starting point of the ...

Embodiment 2

[0040] combine figure 1 Describe this embodiment, a non-closed thin-walled structural part GTAW double-filling wire additive manufacturing method described in this embodiment, the non-closed thin-walled structural part is a multi-layer single-channel structural part that is not connected from end to end, so Said method is realized through the following steps:

[0041] Step 1: install the copper alloy wire guide tubes 5 and 4 symmetrically on the left and right sides of the GTAW welding torch 2 respectively, and the angle β between the guide wire tube and the welding torch is 65°.

[0042] Step 2: Grinding the surface of the substrate 1 before stacking, and then using acetone to remove oil stains on the surface of the substrate 1, and fixing the cleaned substrate 1 on a fixture for additive manufacturing. The GTAW welding torch 2 is moved above the substrate so that the tip of the tungsten pole is 6mm away from the substrate surface, and the starting point of the accumulation ...

Embodiment 3

[0048] combine figure 1 Describe this embodiment, a non-closed thin-walled structural part GTAW double-filling wire additive manufacturing method described in this embodiment, the non-closed thin-walled structural part is a multi-layer single-channel structural part that is not connected from end to end, so Said method is realized through the following steps:

[0049] Step 1: install the copper alloy wire guide tubes 5 and 4 symmetrically on the left and right sides of the GTAW welding torch 2 respectively, and the angle β between the wire guide tube and the welding torch is 50°.

[0050] Step 2: Grinding the surface of the substrate 1 before stacking, and then using acetone to remove oil stains on the surface of the substrate 1, and fixing the cleaned substrate 1 on a fixture for additive manufacturing. The GTAW welding torch 2 is moved above the substrate so that the tip of the tungsten pole is 6mm away from the substrate surface, and the starting point of the accumulation ...

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Abstract

The invention provides a manufacturing method for a GTAW double-synchronization filler rod additive of a non-closed thin-wall structural member. The non-closed thin-wall structural member is a multi-layer single-channel structural member which is not connected end to end. Wire feed systems are symmetrically mounted on the left side and the right side of a GTAW welding gun. When the welding gun moves along the stacking path, the same wire feed system serves a rear wire feed system when wire feed is conducted from the rear end of the welding gun and serves as a front wire feed system when wire feed is conducted from the front end of the welding gun, and the directions of stacking paths between adjacent stacking layers are opposite, so that on the different stacking layers, the wire feed system on the left side and the wire feed system on the right side alternately serve as the front wire feed system and the rear wire feed system, the wire feed amount of the front wire feed system and the wire feed amount of the rear wire feed system are adjusted independently, the front wire feed system is used for efficient wire fusion, and meanwhile a small amount of wire fusion is conducted through the rear feeding system. By the adoption of the manufacturing method, the problems that the wire fusion efficiency is low and the forming quality is poor by means of a rear wire feed manner in the non-closed structural piece alternate type stacking process are solved efficiently, the cooling rate of a fusion pool is increased effectively, grains can be refined, and the mechanical performance of formed components is improved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a double synchronous wire-filling additive manufacturing method for non-closed thin-walled structural parts GTAW. Background technique [0002] As we all know, the forming of metal parts basically adopts casting or traditional machining methods, but these methods inevitably have a series of problems such as low material utilization rate, poor structure and mechanical properties of formed parts, and high manufacturing cost. In recent years, the metal component additive manufacturing technology has emerged as the times require. This technology slices the STL model of the part in layers, and shapes each layer according to the set path until the entire metal component is manufactured. It has high material utilization rate and low manufacturing cost. advantage. [0003] Heat sources for additive manufacturing of metal components include lasers, electron bea...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/12
CPCB23K9/124B23K9/167
Inventor 熊俊雷洋洋尹紫秋陈辉
Owner SOUTHWEST JIAOTONG UNIV
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