Research And Development Of Laser Honing Equipment Based On The Special Crafts Of Laser Micro-Texturing

The tribopair of cylinder liner and piston rings is one of the most important components in the engine. Their lubrication and wear status directly affect the performance of the engine. Along with the fast development of laser application technique, a new way of cylinder liner treatment named laser honing was invented by developed country. It can improve the lubrication performance between cylinder liner and piston rings and enhance the rigidity of cylinder wall farthest. Laser surface texturing(LST) has been the most successful way in surface texturing because of its good performance such as high speed, non pollution and excellent control ability for shape and size.However, during the laser surface texturing, high intensity of the laser beam pulse on the metal material surface results in the negative heat effect. A new processing approach of "single pulse one time, repeating at intervals" is presented in this paper. By the new approach,the micro-dimple and groove can be easily fabricated and the negative thermal effect can be reduced.The new crafts has been introduced and the processing methods on typical parts has been discussed.The realization of control system based on the crafts has been discussed. The basic comprising and control principle of the equipment were elaborated in this paper.The designed system is composed of laser source and path system, worktable, control system and accessorial devices. The hardware system design of laser honing equipment and software development of control system is studied based on DPSS YAG laser, IPC, motion control card and Q-switch card. For hardware, the composition and working mechanism of control system is presented, then the internal controlling mechanism and outer interface of MC8041P and an Q-switch card are presented to be used for synchronization control of laser and motion control system which is the key technique of the equipment. For software, how to perform the communication between application software and MC8041P, all kinds of processing modes and display of processing track with object-oriented programming language and DLL technique are described.In the end, laser micro-texturing experiments of flat samples and laser honing experiments of representative friction-units are performed to test the performance of equipment and good results are achieved.