Authors: Shi Ming Ji, Xian Zhang, Li Zhang, Qiao Ling Yuan, Y.H. Wan, Ju Long Yuan
Abstract: In this paper, a new type of flexible sub-size polishing tool, and an advanced polishing technique for free-form surface based on the new type of tool will be researched. The configuration of the flexible polishing tool and the method of controlling the multi-DOF precessions of the flexible polishing tool will be introduced. The rectilineal movement along X,Y, Z axis and flirts on two polar coordinates rotational axis of the polishing tool are used to control the form precision and the surface texture of polished surface. This polishing technique is enable to change continuously the polishing pressure and contact area and makes the flexible polishing tool well suited both to control the texture of work-piece surface and to control the form of work-piece surface. The influence functions the flexible polishing tool is near-Gaussian, symmetrical, and lacks the high spatial frequencies and
center-zero of removal. The example of multi-DOF precessions polishing for optic spherical and aspherical will be introduced. The results show that the form, the size and the movement mode of the polishing tool will have important effect to polishing quality and multi-DOF precessions polishing can obtain better surface texture quality, form precision and higher polishing efficiency than traditional pole-down polishing for free-form surface.
113
Authors: Shi Ming Ji, Li Zhang, Xian Zhang, Yue Hua Wan, Hai Ping He, Ju Long Yuan, Qiao Ling Yuan, Ming Sheng Jin
Abstract: In this paper, a novel spinning-inflated-ballonet polishing tool for curved surface of
mould is proposed. The head of the tool is a spherical spinning-inflated-ballonet whose inner air
pressure can be controlled on-line and the head surface is covered with a suitable polishing cloth.
The head can be rotated in high speed driven by an electromotor or high pressure airflow and its
rotating speed can be adjusted. The flexibility of the head, the polishing force in radial direction and
the contact area between the head surface and the curved surface of the work-piece can be
controlled by adjusting the feeding deepness and ballonet pressure of the tool. The structure and the
polishing mechanism of the novel polishing tool are introduced. The application of robot polishing
system based on the novel polishing tool also is discussed. Finally the polishing control strategy of
curved surface is researched.
21
Authors: Yue Hua Wan, Guan Wang
Abstract: The polishing robot can serve the polishing work and realize the fully automation for obtaining much higher polishing efficiency and well-proportioned surface quality which attracts many researchers’ attention. In this reviews, the research status of the polishing robot are summarized. Twenty-eight articles which published these years about the polishing robot are introduced in brief. The robot system for complex surfaces polishing, automation of polishing process for a cavity surface, intelligently automated polishing abrasive polishing, the CAD/CAM-based position/force controller for a mold polishing robot and so on are reviewed. More research on an effective gasbag polishing technique based on the novel spinning-inflated-gasbag polishing tool, which can obtain well-proportioned quality surface and high polishing efficiency is a potential one. Investigations of the polishing robot will be helpful for the readers understand the robotic polishing.
311
Authors: K.P. Zhang, Cheng Yong Wang, Ying Ning Hu, Yue Xian Song
Abstract: 7CrSiMnMoV (HRC65) hardened steel mold was cutted to investigate the effects of cutting parameters (cutting speed, feed speed, radial cutting depth, axial cutting depth) on cutting force and cutting temperature. Cutting was done with the ball-mill tool coating with TiAlN and without coolant with a high-speed. The aim of this study is putting forward the principle of reasonable choice of cutting parameters and optimizing cutting parameters.
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Authors: Xian Gen Ying, Di Zheng, Li Yong Hu, Jian Ming Zhan
Abstract: This paper proposed a new ballonet polishing method for the precise polishing of aspheric parts. The method is based on the integration of a MRT (Magnetorheological fluid Torque servo)-based ballonet polishing tool system and a CNC lathe. By using this method, the decoupling control of force-position-posture can be realized in polishing process. The structure and working principle of the polishing tool system were introduced. The material removal model for ballonet polishing was established according to Preston Equation. The main factors affecting the material removal were discussed, and the control model of uniform removal was put forward.
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