Design of online detecting systems for laser hardening process

YANG Cai-xia; ZHOU La-wu; LIU Ji-chang; WU Yao-ting

doi:10.3969/j.issn.1001-3806.2011.03.013

LASER TECHNOLOGY > 2011 > 35(3): 334-337. > DOI: 10.3969/j.issn.1001-3806.2011.03.013

YANG Cai-xia, ZHOU La-wu, LIU Ji-chang, WU Yao-ting. Design of online detecting systems for laser hardening process[J]. LASER TECHNOLOGY, 2011, 35(3): 334-337. DOI: 10.3969/j.issn.1001-3806.2011.03.013

Citation:

Design of online detecting systems for laser hardening process

1.
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;
2.
College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;
3.
GAC ChangFeng Motor Co.Ltd.Yongzhou Branch, Yongzhou 425001, China

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Received Date: July 08, 2010
Revised Date: August 27, 2010
Published Date: May 24, 2011

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Abstract

In order to study the processing quality of the laser hardened workpiece, a dynamic detecting system of laser hardening was developed in which a CCD camera was used to capture the thermal radiation images in laser hardening process. The oversaturated phenomenon can be eliminated during the detecting process by selecting the CCD model reasonably. The images of the object were taken by the CCD camera. Then the image data were analyzed by a computer so that image processing made the gray value distribution display clearly, and the hardened band width was obtained by pseudo-color and threshold segmentation processing, which made the software system was developed successfully. The experimental results show that this system can accurately measure the hardened band width, which will contribute to a closed-loop control system for laser hardening for improvement in hardening quality.
- laser technique,
- sensor technology,
- detecting system,
- image processing,
- laser hardening

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