Abstract
On the grinding performance of alumina wheels in ultrasonic vibration–assisted grinding of hardened GCr15 steel
Highlights
In recent years, the demands of mechanical transmission systems have increased to meet the higher performance requirements in modern aerospace, ship, and automobile industry sectors
Comparative experiments on the conventional grinding (CG) and ultrasonic vibration-assisted grinding (UVAG) of hardened GCr15 steel were conducted with white alumina (WA) wheel
When the material removal volume (MRV) of reciprocating grinding Vr = 450 mm3 and the material removal rate (MRR) increases from 1.33 mm3/(mm·s) to 4.17 mm3/(mm·s), the tangential grinding force of CG increases from 57.5 N to 169.2 N and the normal grinding force increases from 143.19 N to 381.73 N
Summary
The demands of mechanical transmission systems have increased to meet the higher performance requirements (e.g., thrust-to-weight ratio, reliability, and service life) in modern aerospace, ship, and automobile industry sectors. The gear steels, such as GCr15 steels, exhibit high hardness (reaching HRC 58-62), high tensile strength, and low thermal conductivity after the carburizing and quenching process; these characteristics are typical to difficult-to-cut materials [8,9,10]. In this case, the severe tool wear and poor ground surface quality are inevitable due to the lack of sufficient coolant in the grinding arc zone during the conventional grinding (CG) process [11,12,13,14]. Improving the wear resistance of alumina wheels and coolant conditions inside the grinding arc zone is crucial in achieving desirable grinding performance and good machining quality
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