Study on the Optimization of the Optical Fiber Laser Welding Process of Thin Board Member

• Main Authors: CHEN,JHENG-WEI, 陳正偉
• Other Authors: WANG,HAI
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/t6fd7x

碩士 === 明志科技大學 === 機械工程系機械與機電工程碩士班 === 107 === Process optimization including the reduction of process labor hour and the enhancement of component strength is still a serious issue into which the related industries must probe nowadays. This study applies principally Taguchi method and factorial verification experiment method aiming at how the working time and the strength of finished products can be improved and enhanced during the process of component welding by the usage of optical fiber laser equipment. We have learned that the impact factors which contribute to process improvement during the process of experiment involve the four factors of focal length of laser welding, laser welding speed, laser power, and pulse frequency. The purpose of this experiment is to exploit the analysis of different parameters of the four impact factors to search out the optimized parameters, based on which the experimental verification is then carried out to acquire the follow-up ideal processing mode and process optimization. Our graduate institute has selected the sheet whose thickness is 0.8 mm to serve as the test specimen of laser welding experiment, and the optimized parameters this research has obtained from the conducted destructive testing experiment are laser welding focal length +2 mm, laser welding speed 1 mm/s, laser power 25 %, and pulse frequency 50 Hz. We have also changed the setting of laser welding speed respectively into 1 mm/s, 3 mm/s, and 5 mm/s during the experiment. We have learned that the kgf-cm value of destructive testing enhances 34% when the speed of laser welding is 1 mm/s, together with the sec value of working time increased by 75%. And the kgf-cm value of destructive testing enhances 23% when the speed of laser welding is 3 mm/s, together with the sec value of working time decreased by 1%. As for the outcome of kgf-cm value when the speed of laser welding is 5 mm/s, 15% is enhanced together with the working time decreased by 16%. Therefore, according to the final result of this research, the ideal optimized parameters are more likely to be laser welding focal length +2 mm, laser welding speed 5 mm/s, laser power 25 %, and pulse frequency 50 Hz.