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Adaptive variable molten pool laser additive manufacturing process

A laser additive and manufacturing technology, applied in additive processing, additive manufacturing, process efficiency improvement, etc., can solve problems such as difficulty in realization, and achieve the effect of easy real-time control, less variables, and high forming efficiency

Active Publication Date: 2019-05-17
安徽煜宸激光技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of powder feeding volume, the powder transmission distance from the powder feeder to the laser cladding head is at least 5 meters. It will be difficult to increase or decrease the powder feeding volume in real time as the laser spot size changes.

Method used

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  • Adaptive variable molten pool laser additive manufacturing process
  • Adaptive variable molten pool laser additive manufacturing process

Examples

Experimental program
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Embodiment 1

[0034] Taking the laser additive manufacturing of superalloy GH150 turbine blades as an example, the process plan of adaptive variable molten pool laser additive manufacturing is explained:

[0035] When the laser fusion test, the process parameters used are: scanning speed is 4mm / s, defocus is 5mm, spot diameter is 3mm, and argon flow is 11L / min. By changing the laser power, the superalloy GH150 is established. Process database of laser power and molten pool size;

[0036] The laser cladding powder is superalloy GH150 spherical powder with a particle size of 75-150μm. Before cladding, the superalloy GH150 spherical powder must be dried under vacuum conditions at about 120°C to remove the adsorbed moisture in the powder;

[0037] The LDM8060 laser processing system is composed of YLS-6000 fiber laser, TWIN PF 2 / 2-MF powder feeding system, three-axis linkage numerical control table, lateral powder feeding nozzle and argon protective box, etc. The thickness of each layer of cladding la...

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Abstract

The present invention relates to the technical field of laser processing, in particular to an adaptive variable molten pool laser additive manufacturing process, comprising the following steps: adjusting the laser power through a laser fusion test, and recording the corresponding molten pool widths at different laser powers, thereby Construct a process database corresponding to the size of the molten pool at different laser powers; establish a three-dimensional model of the part, and then process the three-dimensional model of the part through layered software to obtain the processing information of each layer of the part; real-time adjustment of the laser power to achieve melting The continuous change of the pool size adapts to the change of the wall thickness of the thin-walled parts. The variable-width melting channel is directly formed by one scan instead of multiple laps, and then the variable-thickness thin-walled parts are formed by layer-by-layer stacking, with process parameters. It has the characteristics of less variables, quick response and high forming efficiency.

Description

Technical field [0001] The invention relates to the technical field of laser processing, in particular to an adaptive molten pool laser additive manufacturing process. Background technique [0002] Laser additive manufacturing technology is an advanced manufacturing technology that combines rapid prototyping technology (RP technology) and laser cladding technology. It can realize the direct forming of complex parts. It has the characteristics of good processing flexibility, short cycle and quick market response. The aerospace, automotive, medical and petrochemical industries have important application prospects. [0003] At present, for some thin-walled parts with variable thickness, such as turbine blades of aero-engines, when laser additive manufacturing is used, each layer of profile is formed by multiple passes according to the planned scanning path, and then processed by layer by layer. A thin-walled piece with a certain height is produced. The scanning path planning directl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B33Y50/00
CPCB33Y50/00B22F10/00B22F10/25B22F10/36B22F10/38B22F10/322B22F10/80Y02P10/25
Inventor 葛茂忠范真杨晓红朱福先杨超卢雅琳杨林吉庭婷杨刚
Owner 安徽煜宸激光技术有限公司
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