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Method for improving laser melting deposition forming quality

A technology of laser melting deposition and forming quality, applied in the field of additive manufacturing, can solve the problems of deposition quality and performance degradation, and achieve the effect of improving process stability and processing quality, simple and easy operation, and simple operation.

Inactive Publication Date: 2018-02-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the substrate temperature is difficult to detect and control in the existing laser melting deposition process, resulting in the degradation of deposition quality and performance. Methods

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  • Method for improving laser melting deposition forming quality
  • Method for improving laser melting deposition forming quality
  • Method for improving laser melting deposition forming quality

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Such as Figure 1-8 shown.

[0029] A method to improve the forming quality of laser melting deposition, it passes the heat accumulation factor X of the substrate R The monitoring of the forming quality parameters (such as contact angle, dilution rate, etc.) can be monitored indirectly, and the forming process parameters can be adjusted online accordingly, so that the matrix heat accumulation factor X R The value of is stable within the calibration range, thereby improving its process stability and processing quality. Specifically, the matrix heat accumulation factor X R = T R / R, the temperature T at the distance R after scanning the laser melting deposition molten pool is detected by non-contact temperature measuring equipment R , let X R = T R / R,X R That is, the heat accumulation factor based on the collection radius R, under the cond...

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Abstract

A method for improving the laser melting deposition forming quality is characterized in that monitoring of the parameter change of the forming quality is indirectly achieved by monitoring a heat accumulation factor XR of a base body, and accordingly, online adjustment is conducted on forming process parameters, so that the value of the heat accumulation factor XR of the base body is stabilized within the calibration range, and thus process stability and the machining quality are improved. The principle is simple, the economic and feasible effects are achieved, and operation is easy and convenient; and by effectively measuring the heat accumulation degree of the base body in the deposition process, the excellent value domain of the heat accumulation factor XR of the base body is calibrated,and accordingly, online regulation is conducted the process parameters of laser melting deposition.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to a method for improving the process stability and forming quality of a metal laser melting deposition forming process, specifically a method for improving the forming quality of laser melting deposition. technical background [0002] Laser metal additive manufacturing technology mainly includes two processes: selective laser melting (Selective Laser Melting, SLM) and laser melting deposition (Laser Melting Deposition, LMD). Among them, laser melting deposition technology has high forming efficiency and large forming width, and is widely used in the processing of large and complex parts in the aerospace field. This technology emerged in the 1990s and is a metal additive manufacturing process developed on the basis of laser cladding. With the development of this technology, ensuring the forming accuracy and improving the mechanical properties has gradually become a hot researc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y50/02
CPCB33Y50/02B22F10/00B22F10/22B22F10/36Y02P10/25
Inventor 田宗军沈理达梁绘昕谢德巧刘志东邱明波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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