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Wire guide device and method for laser additive manufacturing of steel and aluminum alloy

A technology of laser additive material and wire guide device, applied in the field of additive manufacturing, can solve the problem that the forming cannot be kept stable, and achieve the effects of avoiding uneven heating, eliminating the influence of air, and reducing the flow distance.

Active Publication Date: 2019-11-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the forming cannot be kept stable in the above-mentioned stainless steel and aluminum alloy wire-based laser additive manufacturing, the present invention provides a guide wire device and method for steel and aluminum alloy laser additive manufacturing

Method used

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  • Wire guide device and method for laser additive manufacturing of steel and aluminum alloy
  • Wire guide device and method for laser additive manufacturing of steel and aluminum alloy
  • Wire guide device and method for laser additive manufacturing of steel and aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Reference attached figure 1 , first pre-treat the 316L stainless steel substrate, wash and degrease with absolute ethanol, and then polish with a grinder. The substrate is then fixed on the bench with a jig. Install 316L stainless steel welding wire 1 into the wire feeding mechanism. Set the laser power to 3KW, and adjust the laser head to make the defocus amount reach +23mm. Set the wire feeding speed to 12m / min, and the laser scanning speed to 8mm / s. Use the adjustment mechanism 5 to adjust the wire feeding angle α to 55°, and the elongation of the welding wire to 15mm, according to the formula The curvature k of the 316L stainless steel welding wire 1 sets the extension length L of the conductive nozzle 2, and at this time, the end of the welding wire 1 just touches the substrate and is in the center of the laser spot. Connect the protective gas tube 4 to pure argon protective gas, and adjust the flow rate of the protective gas to 20 L / min. Carry out the first l...

Embodiment 2

[0041] Reference attached figure 1 , first pre-treat the 6061 aluminum alloy substrate, wash and degrease with absolute ethanol, and then fix the substrate on the workbench with a clamp. Install the 4043 aluminum alloy welding wire 1 into the wire feeding mechanism. Set the laser power to 4KW, and adjust the laser head to make the defocus amount reach +16mm. Set the wire feeding speed to 9m / min, and the laser scanning speed to 6mm / s. Use the adjustment mechanism 5 to adjust the wire feeding angle to 55°, and the elongation of the welding wire to be 12mm, according to the formula The curvature k of the 4043 aluminum alloy welding wire 1 sets the protruding length L of the conductive nozzle 2. At this time, the end of the welding wire 1 just touches the substrate and is in the center of the laser spot. Connect the protective gas tube 4 to pure argon protective gas, and adjust the flow rate of the protective gas to 20 L / min. Carry out the first layer of additive manufacturin...

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Abstract

The invention discloses a wire guiding device and a wire guiding method for steel and aluminium alloy additive manufacturing. The wire guiding device comprises a sharp wire feeding nozzle which blows a protective gas and feeds a wire simultaneously; an electric conductive nozzle and a conical wire feeding nozzle cap for controlling the flowing direction of the protective gas are arranged at the front end of the sharp wire feeding nozzle, wherein the electric conductive nozzle extends out from the conical wire feeding nozzle cap; a fixed structure which is connected with a protective gas pipe is arranged at the rear end of the sharp wire feeding nozzle; and the fixed structure is connected with an adjusting mechanism which is used for adjusting a wire feeding angle. According to the wire guiding device and the method thereof disclosed by the invention, the protective gas is blown out, namely, is gathered near an area to be protected in high density, by controlling the flowing direction of the protective gas and simultaneously shortening the extension of a welding wire; the flowing distance of the protective gas which is blown from the wire feeding nozzle to the area to be protected is reduced; the flow rate of the protective gas which escapes into air in the process of flowing to the area to be protected is reduced; the influence of air in a manufacturing process is greatly eliminated; a manufacturing process is protected well; a workpiece is prevented from being oxidized; and the forming quality is improved.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, in particular to a guide wire device and method for laser additive manufacturing of steel and aluminum alloys. Background technique [0002] Nowadays, additive manufacturing technology has become a research hotspot at home and abroad. This technology has the characteristics of high efficiency, rapidity and flexibility, such as material saving, no need or a small amount of subsequent processing, and "near net shape"; no need for large forging equipment, molds, and special fixtures; complex shapes and difficult-to-process materials can be manufactured; personalized Design, flexible production; shorten the time from design to manufacture, reduce manufacturing costs and risks; can be used for repair of parts, etc. This technology is a new short-cycle, low-cost manufacturing technology, which has important application prospects in the fields of aviation, aerospace and biomedicine. Additive manu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/342B23K26/12B23K26/14B23K26/70B33Y40/00
CPCB23K26/123B23K26/1462B23K26/342B23K26/702B33Y40/00
Inventor 彭勇郭一蒙杜玉光傅霖兵王克鸿周琦孔见
Owner NANJING UNIV OF SCI & TECH
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