In this article, the micro-topography and texture characteristics of machined surface under the condition of high speed cutting are analyzed based on experimental observation. The forming process of machined surface and cause of the appearance are also discussed. The experimental results show that furrow and ridges, surface white layer and molten metal daub by the feed motion of cutting tool are found on machined surface due to the effect of high cutting temperature and rotating of workpiece in high speed turning process.

分析了颗粒增强金属基复合材料的加工表面形貌特点。通过切削试验，研究了切削用量和材料组织结构对 SICP/Al 已加工表面粗糙度的影响，并根据切削表面成形机理及刀具磨损的特征，设计了具有引导光整作用的硬质合金刀具。实验结果表明，该刀具可显著降低加工表面粗糙度和提高刀具寿命。

The problem for adjusting heating current in Electric Hot Machining is how to detect the change of cutting condition. In this paper, Cutting state resistance has been proposed as a state parameter for self-adjusting heating current in EHM. An investigation on the relationship between this parameter and cutting conditions has been carried out. The experimental results show that cutting state resistance can rapidly respond the change of cutting state and optimum control of heating current can be realized in electric hot machining by means of detecting this resistance.

本文开发了适应在线检测需要的精密轴承外径机器视觉检测系统。简明、精确的标定方法、高效精确的图像处理算法（如亚像素边缘定位）使检测系统达到了较高的精度。检测结果表明，系统具有非接触、速度快、精度高、现场抗干扰能力强等优点。

Gearlike cylindrical structure can be used as outer ring of linear bearing for saving material, but the machined surface quality and roundness of this kind of bearing is beyond control in cylindrical grinding and machining efficiency is low. To solve these problems, a new method of pre-stress grinding for gearlike cylindrical surface of linear bearing is put forward based on analysis on the principle of cylindrical centerless grinding. For implementing this process, a set of device with expanding mandrel for loading tensile pre-stress on bearing ring is designed and experiment of through-feed grinding is carried out on centerless grinder. The experimental results show that this method can get fine quality of machined surface and increase the grinding efficiency greatly.