Pang Jingzhu, Ji Xia, Niu Yan, Chen Shaojun
College of Mechanical Engineering, Donghua University, Shanghai 201620, China.
Shanghai Collaborative Innovation Center of High Performance Fibers and Composites, Donghua University, Shanghai 201620, China.
Micromachines (Basel). 2022 Apr 30;13(5):710. doi: 10.3390/mi13050710.
Zirconia is a high demanded structural ceramic with desirable mechanical, thermal, and chemical properties. Poor surface integrity and limited material removal rate caused by high cutting force and wheel wear are the main problems in ceramic grinding. In order to reduce the grinding force and enhance the removal rate in grinding, zirconia ceramics are firstly ablated by laser and then be grinded. A nanosecond laser is used to ablate the surface of zirconia ceramic, the laser-ablated structures with micro pits and thermal microcracks are generated. With the input of subsequent grinding, the machinability of zirconia ceramic workpiece with laser-ablated structures changes. Grinding experiments are conducted to study the grinding force and the material remove of laser-structured zirconia ceramic. Results show that the grinding forces in tangential and normal direction are significantly reduced. Compared to the grinding surface without laser-structured, a damage-free grinding surface is obtained by laser assistance.
氧化锆是一种具有理想机械、热学和化学性能的高需求结构陶瓷。高切削力和砂轮磨损导致的表面完整性差和材料去除率有限是陶瓷磨削中的主要问题。为了降低磨削力并提高磨削中的去除率，首先对氧化锆陶瓷进行激光烧蚀，然后进行磨削。使用纳秒激光烧蚀氧化锆陶瓷表面，产生具有微坑和热微裂纹的激光烧蚀结构。随着后续磨削的进行，具有激光烧蚀结构的氧化锆陶瓷工件的可加工性发生变化。进行磨削实验以研究激光结构化氧化锆陶瓷的磨削力和材料去除情况。结果表明，切向和法向的磨削力显著降低。与无激光结构化的磨削表面相比，通过激光辅助获得了无损伤的磨削表面。
