Same-direction forming mode based forming morphology control method for GMAW material increase manufacturing

A technology of additive manufacturing and control method, applied in the field of additive manufacturing, can solve the problem of height difference between arc-starting end and arc-extinguishing end of formed parts, and achieve the effect of reducing defects, reliable technical support, and high forming dimensional accuracy

Inactive Publication Date: 2016-08-24
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 the difference in height between the arc-starting end and the arc-extinguishing end of the formed part in the existing GMAW additive manufacturing co-directional forming method, and to provide a shape control method for the GMAW additive manufacturing co-directional forming method method

Method used

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  • Same-direction forming mode based forming morphology control method for GMAW material increase manufacturing
  • Same-direction forming mode based forming morphology control method for GMAW material increase manufacturing
  • Same-direction forming mode based forming morphology control method for GMAW material increase manufacturing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment includes the following steps:

[0063] Step 1: Use the PLC controller to complete the I / O control of the arcing and extinguishing action in the GMAW additive manufacturing process, and the electrical signal D / A given control of the forming current and forming voltage, so that the forming speed and forming voltage at the arc starting end are stable. The forming speed, forming current, and forming voltage of the arc-extinguishing end are 0.7 times that of the steady end. The forming length of the arc-starting end is set to 8mm, and the forming length of the arc-extinguishing end is set to 8mm; 4.2mm / s;

[0064] Step 2: Before forming starts, complete the initial setting of forming speed, forming current and forming voltage at the steady end through the PLC man-machine control interface, and gradually reduce the forming speed and forming voltage when reaching the steady end within the forming length of the arc starting end The forming speed and forming vol...

Embodiment 2

[0069] This embodiment includes the following steps:

[0070] Step 1: Use the PLC controller to complete the I / O control of the arcing and extinguishing action in the GMAW additive manufacturing process, and the electrical signal D / A given control of the forming current and forming voltage, so that the forming speed and forming voltage at the arc starting end are stable. The forming speed, forming current and forming voltage of the arc-extinguishing end are 0.95 times that of the steady end. The forming length of the arc-starting end is set to 15mm, and the forming length of the arc-extinguishing end is set to 16mm; 7.3mm / s;

[0071] Step 2: Before forming starts, complete the initial setting of forming speed, forming current and forming voltage at the steady end through the PLC man-machine control interface, and gradually reduce the forming speed and forming voltage when reaching the steady end within the forming length of the arc starting end The forming speed and forming v...

Embodiment 3

[0076] This embodiment includes the following steps:

[0077] Step 1: Use the PLC controller to complete the I / O control of the arcing and extinguishing action in the GMAW additive manufacturing process, and the electrical signal D / A given control of the forming current and forming voltage, so that the forming speed and forming voltage at the arc starting end are stable. The forming speed, forming current, and forming voltage of the arc-extinguishing end are 0.9 times that of the steady end. The forming length of the arc-starting end is set to 10mm, and the forming length of the arc-extinguishing end is set to 9mm; 5mm / s;

[0078] Step 2: Before forming starts, complete the initial setting of forming speed, forming current and forming voltage at the steady end through the PLC man-machine control interface, and gradually reduce the forming speed and forming voltage when reaching the steady end within the forming length of the arc starting end The forming speed and forming volt...

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Abstract

The invention provides a same-direction forming mode based forming morphology control method for GMAW material increase manufacturing. The control method includes the steps that arc starting and quenching movement I / O control and given electric signal D / A control of forming current and voltage are completed in the GMAW material increase manufacturing process, and when the forming process is close to the arc quenching end, the forming current, forming speed and forming voltage are gradually decreased within the length range of the arc quenching end; a GMAW welding gun is increased for one layer height and is controlled to return to the forming arc starting end; the upper surface temperature of a formed part is reduced to be 20-300 DEG C; forming of a residual layer is completed till the forming size of the whole structural part meets the requirements. The same-direction forming mode based forming morphology control method can effectively inhibit the height size difference produced by the part end in the same-direction forming process, decreases the defects produced in the forming process, ensures that higher forming size precision is obtained in GMAW material increase manufacturing in the same-direction forming mode and provides a reliable technical support for forming quality control of GMAW material increase manufacturing.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a method for controlling the shape of a gas metal arc welding (GMAW) additive manufacturing co-directional forming method. Background technique [0002] Arc wire-filling additive manufacturing uses electric arc as the heat source, and metal wire as the filling material, which is formed layer by layer according to the set forming method until a fully welded metal part is formed. Compared with traditional casting and machining technologies, arc-filled wire additive manufacturing has great flexibility in forming, without special fixtures and tooling, which greatly improves the utilization rate of materials. More importantly, the formed components have high density, good metallurgical bonding performance, uniform chemical composition, and excellent mechanical properties. Compared with integral forgings, they have the advantages of high strength and good tou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/04
CPCB23K9/044B23K9/173
Inventor 熊俊尹紫秋雷洋洋陈辉
Owner SOUTHWEST JIAOTONG UNIV
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