Title: Tangential dressing of diamond grinding wheel by femto-second pulsed laser with Bessel beam

Authors: Jiabin Zhou; Dongkai Chu; Peng Yao; Xiyong Jin; Lianjun Zhao; Yueming Li; Shitong Liang; Jimiao Xu; Shuoshuo Qu; Chuanzhen Huang

Addresses: Center for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan, 250061, China ' Center for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan, 250061, China ' Center for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan, 250061, China; Shenzhen Research Institute, Shandong University, Shenzhen, 518063, China Fax: +86-532-88392118 ' Goertek Inc., Weifang, 261041, Shandong, China ' Goertek Inc., Weifang, 261041, Shandong, China ' Beijing Institute of Control Engineering, Beijing, 100190, China ' Beijing Institute of Control Engineering, Beijing, 100190, China ' Beijing Institute of Control Engineering, Beijing, 100190, China ' Center for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan, 250061, China ' School of Mechanical Engineering, Yanshan University, Qinhuangdao, 066004, Hebei, China

Abstract: Bronze bonded diamond grinding wheel is widely used in grinding hard and brittle materials. In order to improve the profile accuracy of the grinding wheel, an ultra-fast laser dressing method with Bessel beam for diamond grinding wheel is proposed in this study. The coarse grain (100 #) bronze bonded diamond grinding wheel is tangentially shaped by laser dressing. By comparing the profile and surface quality of the grinding wheel dressed with Gaussian laser beam and Bessel laser beam under different defocusing amounts, it is found that Bessel beam can dress the grinding wheel in the focal depth of 1.2 mm, which is three times of traditional Gaussian beam. The ablation thresholds of bronze binder and diamond under Bessel beam are obtained through experiments and theoretical calculations. The results show that when the laser power density is 3.75 × 10⁵ W/cm² – 4.75 × 10⁵ W/cm² and the axial scanning speed of the laser is 0.03 mm/min, the diamond grit has an enough protrusion height, and the runout of the grinding wheel is reduced to about 6 μm. When the wheel speed is too low, it will reduce the overlap rate of axial scanning trajectory and reduce the removal efficiency of material.

Keywords: bronze bond diamond grinding wheel; laser dressing; Bessel beam; defocusing amount; material removal; abrasive protrusion height; removal efficiency.

DOI: 10.1504/IJAT.2023.130845

International Journal of Abrasive Technology, 2023 Vol.11 No.3, pp.212 - 232

Received: 08 Jul 2022
Accepted: 14 Dec 2022
Published online: 12 May 2023 *