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Device and method for actively controlling temperature of electric arc additive manufacturing magnesium alloy workpiece

A technology of additive manufacturing and active control, which is applied in the field of actively controlling the temperature of magnesium alloy parts manufactured by arc additive manufacturing, and the device field of actively controlling the temperature of magnesium alloy parts manufactured by arc additive manufacturing. Variation, large residual stress and other problems, to avoid the poor uniformity of the overall structure, improve the coarsening of the structure, and improve the processing efficiency

Pending Publication Date: 2022-01-21
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the retrieval of the above patents, combined with the existing technology, it is found that although the above equipment can speed up the cooling of magnesium alloys manufactured by arc additive manufacturing to a certain extent during use, the equipment cannot detect the temperature of the molten pool and printed parts , and the cooling rate cannot be controlled, only the substrate and the surfacing layer can be cooled, but controllable cooling cannot be achieved
During the additive process, if the cooling is too fast, it will not only aggravate the inhomogeneity of the internal structure of the additive part and generate a large residual stress, but also may make the fluidity of the liquid metal in the molten pool worse, and cannot be deposited The layer is completely spread out, forming defects such as weld bumps and cold shuts, which seriously affects the quality of arc additive manufacturing

Method used

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  • Device and method for actively controlling temperature of electric arc additive manufacturing magnesium alloy workpiece
  • Device and method for actively controlling temperature of electric arc additive manufacturing magnesium alloy workpiece
  • Device and method for actively controlling temperature of electric arc additive manufacturing magnesium alloy workpiece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for actively controlling the temperature of magnesium alloy parts produced by arc additive manufacturing, using the above-mentioned device, specifically includes the following steps:

[0046] (1) Turn on the temperature controller 12, and make the heating column 6b heat the heatable substrate 6c through the wire 10;

[0047] In step (1), the heating rate of the heatable substrate 6c is 15°C / min, and the heating temperature of the heatable substrate 6c is 150°C. The heatable substrate 6c is a magnesium substrate.

[0048] (2) When the temperature of the heatable substrate 6c rises to 150°C, stop heating, turn on the welding robot 2 and start printing immediately;

[0049] (3) During the printing process, each time the welding robot 2 completes a layer of printing, the thickness of each layer is 0.5mm, and the temperature of the printing layer is monitored by the infrared temperature detector 7. If the infrared temperature detector 7 detects that the temperature...

Embodiment 2

[0053] A method for actively controlling the temperature of magnesium alloy parts produced by arc additive manufacturing, using the above-mentioned device, specifically includes the following steps:

[0054] (1) Turn on the temperature controller 12, and make the heating column 6b heat the heatable substrate 6c through the wire 10;

[0055] In step (1), the heating rate of the heatable substrate 6c is 25°C / min, and the heating temperature of the heatable substrate 6c is 250°C. The heatable substrate 6c is a magnesium substrate.

[0056] (2) When the temperature of the heatable substrate 6c rises to 250°C, stop heating, turn on the welding robot 2 and start printing immediately;

[0057] (3) During the printing process, each time the welding robot 2 completes a layer of printing, the thickness of each layer is 7mm, and the temperature of the printing layer is monitored by the infrared temperature detector 7. If the infrared temperature detector 7 detects that the temperature o...

Embodiment 3

[0061] A method for actively controlling the temperature of magnesium alloy parts produced by arc additive manufacturing, using the above-mentioned device, specifically includes the following steps:

[0062] (1) Turn on the temperature controller 12, and make the heating column 6b heat the heatable substrate 6c through the wire 10;

[0063] In step (1), the heating rate of the heatable substrate 6c is 20°C / min, and the heating temperature of the heatable substrate 6c is 200°C. The heatable substrate 6c is a magnesium substrate.

[0064] (2) When the temperature of the heatable substrate 6c rises to 200°C, stop heating, turn on the welding robot 2 and start printing immediately;

[0065] (3) During the printing process, every time the welding robot 2 completes a layer of printing, the thickness of each layer is 2mm, and the temperature of the printing layer is monitored by the infrared temperature detector 7. If the infrared temperature detector 7 detects that the temperature ...

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Abstract

The invention discloses a device for actively controlling the temperature of an electric arc additive manufacturing magnesium alloy workpiece. The device comprises a forming chamber, a temperature controller and a water cooling machine, wherein the temperature controller and the water cooling machine are arranged outside the forming chamber; a welding robot and a printing workbench are arranged in the forming chamber; a temperature-controllable base plate unit is arranged on the upper surface of the printing workbench; a magnesium alloy printing piece is arranged on the temperature-controllable base plate unit; the temperature-controllable base plate unit is further connected with the temperature controller and the water cooling machine; an infrared temperature detector is arranged on the top wall in the forming chamber and connected with the temperature controller; ventilation openings are formed in the two opposite side walls of the forming chamber; and an air inlet fan is arranged in each ventilation opening. According to the device, the cooling rate can be increased, the manufacturing efficiency is greatly improved, and application and development of magnesium alloys in the field of electric arc additive manufacturing are effectively promoted. The invention further discloses a method for actively controlling the temperature of the electric arc additive manufacturing magnesium alloy workpiece.

Description

technical field [0001] The invention belongs to the technical field of metal materials and metallurgy, and in particular relates to a device for actively controlling the temperature of magnesium alloy parts manufactured by arc additive manufacturing, and also relates to a method for actively controlling the temperature of magnesium alloy parts manufactured by arc additive manufacturing. Background technique [0002] Wire Arc Additive Manufacture (WAAM) is a kind of arc as heat source, metal wire as raw material, combined with computer-aided design, to realize the processing and manufacturing of parts by layer-by-layer deposition method. According to different heat sources, there are three commonly used metal arc welding (MIG), non-metal arc welding (TIG), and plasma arc welding (PAW). WAAM highly integrates product digital design, manufacturing, and analysis, and has many advantages such as fast processing speed, high energy utilization rate, and high degree of freedom in fo...

Claims

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Application Information

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IPC IPC(8): B23K9/095B23K9/28B23K9/32B33Y10/00B33Y30/00
CPCB23K9/095B23K9/287B23K9/32B33Y10/00B33Y30/00
Inventor 徐春杰张凯军马东路瑶涵史妍李梦阳杜薇李珍娇武向权郭灿张忠明丹·谢赫特曼
Owner XIAN UNIV OF TECH
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