A comparative study on the grinding performance of different ordinary corundum grinding wheels for profile grinding TC11 titanium alloy arc-shaped slots
摘要
Grinding wheel surface state is an important factor affecting the quality of grinding process, which has a crucial impact on the workpiece performance. For the TC11 titanium alloy arc-shaped slots, a forming roller is used to dress white corundum (WA) grinding wheel, silicon carbide (SiC) grinding wheel and microcrystalline corundum (SG) grinding wheel in this paper. Firstly, the grinding performance of the wheel efficacy reveals systematic analysis across two critical dimensions: grinding force and surface quality. Experimental findings demonstrate that SG grinding wheel has lower surface roughness (Ra) and grinding force. Compared with WA and SiC grinding wheel, the grinding forces of SG grinding wheel in the three directions (Fx, Fy, Fz) have decreased by 55.6%, 34.5%, 41.7% and 25.8%, 10.3%, 38.5% respectively. And the Ra at the position of the slot 1, 4, 5 (Fig. 1 (c)) is reduced by 7.7%, 6.0%, 3.7% and 13.4%, 9.3%, 9.5%, respectively. Secondly, taking the SG as the processing tool, the influence of dressing speed ratio and dressing feed rate on grinding force and Ra is analyzed. It is observed that the grinding force exhibits a decreasing trend with increasing dressing speed ratio, while demonstrating a continuous rising trend as the dressing feed rate increases. The Ra decreases with increasing dressing speed ratio, while it increases with higher dressing feed rate. Finally, the influence of different wear stages of SG grinding wheel on grinding force and Ra is explored. The results indicate that the grinding force exhibits a continuous upward trend as wheel wear progresses, whereas the Ra initially decreases and subsequently increases.