发动机气缸激光珩磨加工技术研究

发布时间：2018-05-10 07:06

本文选题：气缸孔 + 激光珩磨　；参考：《重庆理工大学》2015年硕士论文

【摘要】：在发动机气缸中,缸套-活塞环是最核心的部件之一,它的润滑、磨损和摩擦等问题对发动机的性能有着重要的影响,既对发动机的性能和工作效率产生影响,同时对其使用寿命也起着决定性作用。正是由于激光珩磨加工技术的出现,缸套-活塞环的润滑性能得到了很大的改善。目前,在发动机气缸加工中,激光珩磨微加工技术正在起着越来越重要的作用。本文简要介绍了摩擦副润滑基本理论,为气缸孔激光织构微加工奠定理论基础。介绍了激光表面织构微加工设备的组成及工作原理。激光微织构加工设备主要包括激光发生器、光学系统、机械运动系统、运动反馈系统、控制系统的软硬件部分及辅助系统,是集机、光、电、气一体化的新型激光微织构加工设备。以45#钢试样表面为例,以激光表明织构微加工工艺试验为基础,重点分析了影响气缸表面凹腔及沟槽加工质量的工艺参数,确定了合适的激光控制参数范围,得出最佳凹腔及沟槽激光加工工艺参数。同时,对采用激光珩磨微织构加工技术的凹腔与沟槽进行润滑摩擦性能试验研究,得到最优凹腔及沟槽加工参数。与未织构试样相比,激光珩磨加工后试样的摩擦、润滑、耐磨性能都得到相应提高。
[Abstract]:In the engine cylinder, the cylinder liner piston ring is one of the most core components. Its lubrication, wear and friction have an important impact on the engine performance, both on the performance and efficiency of the engine. At the same time, its service life also plays a decisive role. Because of the appearance of laser honing technology, the lubrication performance of cylinder liner-piston ring has been greatly improved. At present, laser honing technology is playing a more and more important role in engine cylinder machining. The basic theory of friction pair lubrication is briefly introduced in this paper, which lays a theoretical foundation for laser micromachining of cylinder hole. The composition and working principle of laser surface texture micromachining equipment are introduced. Laser microtexture processing equipment mainly includes laser generator, optical system, mechanical motion system, motion feedback system, hardware and software part of control system and auxiliary system. Gas-integrated laser microtexture processing equipment. Taking the surface of 4steel specimen as an example, based on the experiment of laser indicated texture micromachining, the technological parameters affecting the machining quality of the concave cavity and grooves on the cylinder surface are emphatically analyzed, and the suitable laser control parameters range is determined. The optimum laser processing parameters of concave cavity and groove are obtained. At the same time, the friction and lubrication performance of the cavity and grooves with laser honing micro-texture processing technology was studied, and the optimum machining parameters of the cavity and groove were obtained. Compared with the untextured samples, the friction, lubrication and wear resistance of the samples processed by laser honing have been improved accordingly.
【学位授予单位】：重庆理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TK406

【参考文献】