模具自由曲面變軌跡拋光技術(shù)研究
[Abstract]:Aiming at the problems of low polishing efficiency and poor uniformity of abrasive polishing trajectory, a variable trajectory elastic polishing wheel technology is proposed. This paper introduces the working principle and mechanical structure design of the elastic polishing wheel tool. Under the guidance of Preston equation and Hertz contact theory, the pressure distribution, velocity distribution and abrasive polishing trajectory uniformity in the polishing contact region are studied. Build the material removal model of polishing tools. Based on kinematics model, Matlab was used to simulate the polishing trajectory of elastic polishing wheel tool under different rotational speed ratio, and the simulation results were compared and analyzed according to the evaluation standard of uniformity. The results show that the rotation speed ratio has an important effect on the uniformity of the abrasive polishing trajectory. When the pressure is 0.5 mm, the contact diameter of the polishing contact circle is 5 mm, revolution for 3 weeks, the specific rotational speed ratio of 10.645 mm, to 10.645 CV value is reduced by 32 parts at 10:00. When the rotational speed ratio tends to be irrational, the uniformity of the polishing trajectory is obviously better than the integer rotational speed ratio, and the removal function is more full.
【作者單位】: 西安建筑科技大學機電工程學院;
【基金】:國家自然科學基金(51375361)
【分類號】:TG580.692;TG76
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