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Determination of Surface Roughness in Wire and Arc Additive Manufacturing Based on Laser Vision Sensing 被引量:2
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作者 Jun Xiong Yan-Jiang Li +1 位作者 Zi-Qiu Yin Hui Chen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2018年第4期133-139,共7页
Wire and arc additive manufacturing(WAAM) shows a great promise for fabricating fully dense metal parts by means of melting materials in layers using a welding heat source. However, due to a large layer height produce... Wire and arc additive manufacturing(WAAM) shows a great promise for fabricating fully dense metal parts by means of melting materials in layers using a welding heat source. However, due to a large layer height produced in WAAM, an unsatisfactory surface roughness of parts processed by this technology has been a key issue. A methodology based on laser vision sensing is proposed to quantitatively calculate the surface roughness of parts deposited by WAAM.Calibrations for a camera and a laser plane of the optical system are presented. The reconstruction precision of the laser vision system is verified by a standard workpiece. Additionally, this determination approach is utilized to calculate the surface roughness of a multi-layer single-pass thin-walled part. The results indicate that the optical measurement approach based on the laser vision sensing is a simple and effective way to characterize the surface roughness of parts deposited by WAAM. The maximum absolute error is less than 0.15 mm. The proposed research provides the foundation for surface roughness optimization with different process parameters. 展开更多
关键词 Wire and arc additive manufacturing Surface roughness measurement Laser vision sensing Three-dimensional reconstruction
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Vision sensing of P-GMAW weld pool using narrow band filters with different center wavelengths 被引量:2
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作者 梁志敏 汪殿龙 王军 《China Welding》 EI CAS 2013年第1期41-46,共6页
The selection of narrow band filter's center wavelength has an important influence on the quality of the weld pool image captured in passive vision mettmd for controlling arc welding process. In this paper, 29 narrow... The selection of narrow band filter's center wavelength has an important influence on the quality of the weld pool image captured in passive vision mettmd for controlling arc welding process. In this paper, 29 narrow band filters with different center wavelengths ranging from ultraviolet to near infrared wavelength were used to capture images of weld pool during both the peak current period and the base current period of P-GMA W ( pulsed gas metal arc welding). The experimental results showed that the filters with near infrared center wavelength could weaken the arc most during the peak current period, while during the base current period the entire weld pool could be seen with the filters with wavelength above 600 nm. The camera spectral response and the radio of arc to weld pool emission were considered to analyze the phenomenon of experimental results. 展开更多
关键词 narrow band filter weld pool vision sensing pulsed gas metal arc welding
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Specular reflection based sensing surface deformation of gas tungsten arc weld pool 被引量:4
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作者 张世亮 高进强 +1 位作者 武传松 张裕明 《China Welding》 EI CAS 2007年第2期1-4,共4页
A sensing system is developed to measure the weld pool boundary and pool suoface deformation in gas tungsten arc welding. LaserStrobe technique is used to eliminate the strong arc light inteoference, and specular refl... A sensing system is developed to measure the weld pool boundary and pool suoface deformation in gas tungsten arc welding. LaserStrobe technique is used to eliminate the strong arc light inteoference, and specular reflection from the pool suoface is sensed to describe the relation between the deformed stripes and pool surface depression. Clear images of both the pool boundary and the deformed stripes edges are obtained during gas tungsten arc welding process, which lays foundation for realtime monitoring the pool suoface depression and weld penetration. 展开更多
关键词 vision sensing weld pool surface deformation specular reflection
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