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White out rollers7/25/2023 ![]() Peng YF, Wang ZZ, Yang P (2020) Grinding and dressing tools for precision machines. Jouini N, Revel P, Thoquenne G (2020) Influence of surface integrity on fatigue life of bearing rings finished by precision hard turning and grinding. The reliability and practicality of the developed dressing device were verified by the results of dressing and grinding experiments. ![]() The surface roughness Ra of GCr15 bearing rings ground by the WA grinding wheel after LTUARD is 0.32 μm, which is 15.79% lower than the surface roughness Ra ground after CRD, and the surface quality of GCr15 bearing rings ground by the WA grinding wheel after LTUARD dressing is better. The results of dressing and grinding experiments show that the roundness error of WA grinding wheels using LTUARD is 8.55 μm, which is 41.56% less than CRD. Subsequently, the resonant frequency of the LTUARD vibration system was found to be 19827 Hz, and the amplitude ranges of longitudinal and torsional vibration were 0~3 μm and 0~1.2 μm, respectively, through impedance analysis and vibration characteristic testing. The geometric dimensions of the longitudinal vibration horn with the large tool head were firstly determined by the set of transcendental equations, and then, the longitudinal vibration was converted to longitudinal-torsional vibration by adding a helical slot in the conical section. ![]() The longitudinal-torsional horn with roller loading was mainly studied during the device development of LTUARD. A device of LTUARD was developed to investigate the dressing effect of the longitudinal-torsional ultrasonic-assisted roller on the white alumina (WA) grinding wheel. A longitudinal-torsional ultrasonic-assisted roller dressing (LTUARD) method is proposed to achieve high precision and high-quality grinding wheel dressing. However, the low dressing accuracy and poor dressing quality of grinding wheels using conventional roller dressing (CRD) are problems that need to be solved urgently. Grinding wheel dressing is the key to achieving precision form grinding of GCr15 bearing rings.
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