Papers by Author: Chun Guang Han

Abstract: In order to ensure the machining precision of wedge nonaxisymmetric aspheric lens, a parallel grinding method is designed using a clamp with adjustable gradient. Based on the machining method, three path plans of machining are put forward. Simulation results show that the three methods have their particular advantages according to the different requirement of machining.

Abstract: Nowadays, the demands of large scale surface devices are becoming popular in engineering fields. The grinding process is one of the common methods to achieve the high quality of large scale workpiece. But the final form accuracy of large scale devices is always low. Then it is necessary to analyze the error mechanism of grinding machine on the form accuracy of large scale workpiece. In this paper, the influencing factors of surface grinding machine with horizontal spindle and rectangular table were analyzed firstly. Then the mechanism of guiding accuracy on the surface form accuracy was discussed. It is found that the Z-axis’ guiding accuracy could seriously influence the surface form accuracy. Finally, the face grinding experiment of large scale iron workpiece (420mm×420mm) was performed and the surface form accuracy was measured. The experimental result was in agreement with the theoretical result. It can be concluded that the Z-axis guarding accuracy of grinding machine should be exactly controlled to achieve the high surface precision of large scale device.

Abstract: In order to ensure the machining precision of wedge nonaxisymmetric aspheric lens, a parallel grinding method is designed using a clamp with adjustable gradient. Based on the machining method, three path plans of machining are put forward. Simulation results show that the three methods have their particular advantages according to the different requirement of machining

Abstract: In ultra precision machining processes, an effective monitoring system can maintain machine tools in the best condition and delay the occurrence of tool wear and improve the quality of workpiece. In this paper, a distributed system is developed for monitoring of multi-machine tool based on wireless sensor network. Firstly, the sensor in the machine tool is responsible for the information collection and data processing. Secondly, the wireless network is used to transmit the data or receive the commands from the computer of control center. Finally, the computer will monitor the overall system and generate the alarm signals or the commands when the change of environment information occurs. The experimental results have shown the effectiveness of the proposed distributed system.

Abstract: This paper presents a wireless distributed monitoring and system in optical aspheric grinding environment. The architecture of proposed system and the details of monitoring strategy are discussed according to the characteristic of optical aspheric grinding. The results of experiments have shown that the proposed system can be used effectively in optical aspheric grinding.