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《China Mechanical Engineering》 2016-19
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Technological Experiments of Ultrasonic Deep Rolling with Longitudinal-torsional Vibration

Zheng Jianxin;Hou Yali;Henan Polytechnic University;  
Q235steel was processed by UDR with LTV(UDR-LTV)based on orthogonal tests.The effects of processing parameters on surface roughness and surface micro hardness were studied.The prediction models for surface roughness and micro hardness were constructed based on the experimental results.The experimental results show that UDR-LTV may lead to a marked reduction the surface roughness and a considerable increase in surface micro hardness.The values of surface roughness increase first and then decrease with the increment of the static pressure;and increase markedly with the increment of the feed-rate,and change a little with the increment of the rolling speed.Meanwhile,the feed-rate has a marked effect on the surface roughness.The values of surface micro hardness increase with the increment of the static pressure;and fluctuate a little with the increment of the feed-rate and the rolling speed.And the static pressure has a marked effect on the surface micro hardness.t-test and the coefficient of correlation were calculated.The calculated results indicate that the surface roughness are most affected by the interaction of the feed-rate and the static pressure,and the surface micro hardness are most affected by the interaction of the static pressure and the rolling speed.The optimal parameters for the lowest surface roughness and highest micro hardness obtained by the orthogonal test are close to that obtained by the prediction models,which indicates that the prediction models are reliable.
【Fund】: 国家自然科学基金资助项目(51005071 51575163);; 河南省高等学校重点科研资助项目(16A460006)
【CateGory Index】: TG306;TG663
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