Metal powder laser forming process temperature field detection method and its systematic device

A technology of laser forming and metal powder, which is applied in measuring devices, radiation pyrometry, thermometers, etc., can solve problems such as high cost, harsh processing environment conditions, and processing environment interference

Inactive Publication Date: 2008-03-19
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Problems solved by technology

At present, non-contact infrared temperature measurement is a research hotspot in rapid prototyping. Some research departments have used infrared detectors to measure temperature, but the instrument is greatly disturbed by the processing environment and the cost is high.
The infrared image colorimetry method based on dual wavelengths has been used to detect the temperature fiel

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  • Metal powder laser forming process temperature field detection method and its systematic device
  • Metal powder laser forming process temperature field detection method and its systematic device
  • Metal powder laser forming process temperature field detection method and its systematic device

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044]The temperature field detection method in the metal powder laser forming process of the present invention: adopts the dual-wavelength infrared image colorimetric temperature measurement method, and alternately places the filters of the two wavelengths in the collection optical path in time-sharing, and the step-by-step continuous collection comes from two For the image of the melting pool at different wavelengths, the image grayscale colorimetric calculation is performed based on two infrared images from different wavelengths, and the temperature value of each point on the image is obtained according to the relationship between the ratio and temperature, and the grayscale value is used to represent the temperature value. Furthermore, the grayscale image is processed, and then the generated grayscale image is image-processed to obtain its shape and temperature chan...

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Abstract

The invention relates to a metal powder laser rapid prototyping technology, in particular to a temperature field detecting method and the system device in the working process of the rapid prototyping of the metal powder. The invention adopts dual wavelength infrared image colorimetric temperature measuring method, the optical filters in two wavelengths are alternately arranged in the gathering optical path at different times, the image in the fused bath from two different wavelength are continuously and orderly gathered, and the color matching calculation of the gradation of the two infrared image from different wavelength are performed, according to the relationship between the color matching value and the temperature value, the temperature value of each point of the image is acquired, the temperature value is represented by the tonal value and a gradation image is formed, the gradation image then is processed, and the shape and temperature changing trend is acquired. By adopting the invention, the temperature distribution and the changing trend of the temperature field of the fused bath can be detected in real time during the rapid prototyping process of the metal powder, and then the temperature of the work piece process parameter can be adjusted in real time.

Description

technical field [0001] The invention relates to metal powder laser rapid prototyping technology and non-contact temperature measurement technology of temperature field, specifically a temperature field detection method and system device in metal powder laser rapid prototyping process. Background technique [0002] Metal powder laser forming technology, which appeared in the late 1990s, is a new processing and manufacturing technology based on rapid prototyping technology. Its unique processing characteristics of metal parts have attracted widespread attention and research from scientific research institutes in recent years. and applications. Metal powder laser forming is a processing process affected by many factors, such as changes in processing parameters, unstable environmental conditions, etc. will affect the quality of the formed parts, and the accumulation of errors in the continuous processing process often leads to the quality of the formed parts or The accuracy can...

Claims

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Application Information

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IPC IPC(8): G01K13/00G01J5/00G01J5/60
Inventor 刘伟军邢飞姜淑娟于彦凤普雄鹰
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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