Vibration Reduction in Milling Using a Machine Center

• Main Authors: Chun-Yi Wu, 吳俊誼
• Other Authors: Chun-Hsi Su
• Format: Others
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22103TIT05621090%22.&searchmode=basic

碩士 === 國立臺北科技大學 === 製造科技研究所 === 103 === Machine tool abnormal vibrations will make the surface of the worse workpiece during machining . In order to improve production efficiency and surface quality , this study used the inerter, spring, damping to force vibration disturbance to a minimum. The study adopted in the analysis, damping effects, and design and production experiment platform, and also developed a graphic control program to monitor various aspects of machine tool vibration condition. The accelerometer system and microphone system were used to measure milling S45C conditions and vibration generated damping effect. In the cutting experiment, the depth of cut is fixed to 5 mm, the speed is fixed to 500 rpm, while the feed rate is fixed to 225 mm / min. The result showed that the maximum acceleration is 16.5 g in the absence of damping system, the average of surface roughness is Ra 1.68 μm. However, after adding an inerter system, the acceleration rate could be reduced from 16.5 g to 12.7 g, and the average surface roughness could be reduced from Ra 1.68 μm to Ra 1.07 μm. By adding a spring system, the acceleration rate is 16.8 g, and the average surface roughness could be reduced from Ra 1.68 μm to Ra 1.38 μm. By adding a damping system, the acceleration rate is 18.7 g, and the average roughness is Ra 1.77 μm. Although the average surface roughness of adding shock absorber is bigger than without shock absorber, the average surface roughness of the overcutting position (y = 22 mm) reduced from Ra 2.58 μm to Ra 1.54 μm.