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In situ real-time measurement device used in powder bed melting additive manufacturing process

A technology of additive manufacturing and real-time measurement, applied in the field of additive manufacturing, can solve the problems of inability to monitor substrate deformation and temperature changes in real time simultaneously, and achieve the effects of wide application range, convenient installation, and flexible monitoring methods

Inactive Publication Date: 2020-01-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide an in-situ real-time measurement device in the powder bed fusion additive manufacturing process to solve the problem that the deformation and temperature change of the substrate cannot be monitored simultaneously in real time during the powder bed fusion additive manufacturing process. question

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  • In situ real-time measurement device used in powder bed melting additive manufacturing process
  • In situ real-time measurement device used in powder bed melting additive manufacturing process
  • In situ real-time measurement device used in powder bed melting additive manufacturing process

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Embodiment

[0060] The invention discloses a real-time in-situ measurement device for powder bed fusion additive manufacturing, which can measure the temperature history and deformation of a specific position on a substrate during the additive manufacturing process.

[0061] Taking the selective laser melting in the powder bed fusion technology as a representative, it is explained how the present invention realizes in-situ real-time and accurate measurement of temperature by means of a data measuring device in the process of additive manufacturing. Such as figure 1 As shown, during the processing, the thermocouple monitors the temperature, and the measurement data is recorded and analyzed by the corresponding data recorder 6 .

[0062] When installing, install the lower bracket 8, the displacement sensor fixing plate 9, and the upper bracket 10 from bottom to top on the lifting platform 7 of the forming room, then install the workbench 5 on the upper bracket 10, and finally install the 50...

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Abstract

The invention discloses an in situ real-time measurement device used in a powder bed melting additive manufacturing process. A thermocouple of the device is arranged at a position, where temperature needs to be measured, on a substrate, and a displacement sensor is in contact with the lower surface of the substrate, so that the displacement sensor can measure deformation of the substrate in the additive manufacturing process. The device disclosed by the invention can realize in situ real-time monitoring on thermal-deformation (or temperature) of the substrate and a formed part in the powder bed melting additive manufacturing process, can accurately reflect evolution rules of the thermal-deformation (or temperature) of the substrate along with time, not only provides a reliable experimentalmeasurement basis for studying a deformation mechanism of the substrate and the formed part in the powder bed melting additive manufacturing process, but also provides powerful experimental data forfinite element simulation on powder bed melting additive manufacturing and finally lays a foundation for establishing a technique of effectively controlling deformation of the substrate and the formedpart as well as obtaining a high-precision and high-performance formed part.

Description

【Technical field】 [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to an in-situ real-time measurement device in the powder bed fusion additive manufacturing process. 【Background technique】 [0002] Powder bed fusion additive manufacturing technology, its principle is: use the computer 3D design software to generate the 3D CAD model of the part and slice and layer, obtain a series of 2D cross-sectional information, and then set the heat source scanning strategy and process parameters according to the cross-sectional shape data . The scraper spreads a thin layer (thickness of about 30um) of powder on the substrate, and then the computer controls the heat source to selectively melt the layer of powder according to a preset path to form a two-dimensional cross-section of the part on the layer, and then the substrate is lowered by one The thickness of the powder layer continues the above steps until the parts are processed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/02G01K7/02G01K1/14B33Y40/00G01K1/143
CPCG01N25/02G01K7/02G01K1/14B33Y40/00
Inventor 林鑫曹阳杨海欧马良谭华史硕晴鹿旭飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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