从表面完整性角度研究了五种制孔工艺对7075铝合金板材紧固孔表面加工质量的影响，通过对不同种工艺所产生的紧固孔表面粗糙度、残余应力和显微硬度进行检测和比较，发现钻扩铰多步慢进给工艺和钻扩铰一步复合制孔工艺所达到的表面完整性指标优于其它加工工艺。另外分析了影响孔加工质量的因素，证明了一步复合制孔工艺是一种先进、快捷的高质量制孔方法。

The basic structure of a virtual axis drill grinder is presented in terms of the spatial vectors. Grinding parameters calculated according to the geometry of a helical drill point. The kinematic equations for sharpening the drills on the virtual axis grinder are deduced using the grinding parameters via vector-matrix transformation.

Cutting forces generated using CBN tools have been evaluated when cutting steel hardened to 45-55 HRC. Radial thrust cutting force was the largest among the three cutting force components and was most sensitive to the changes of cutting edge geometry and tool wear. The surface finish produced by CBN tools was compatible with the results of grinding and was affected by cutting speed, tool wear and plastic behaviour of the workpiece material.

建立了6-UPS型并联机构的动力学模型。为了能使动力学模型包含所有构件的重力和惯性力，以6-UPS并联机构的支链为研究对象，运用D-H方法建立了各构件的坐标系，推导了支链的运动学反解的解析方程，并给出了各个构件的速度、加速度与动平台的速度、加速度的映射关系。然后用牛顿－欧拉方法推导了6-UPS并联机构的动力学模型，为支链中各个构件支反力的求解和整个机构的动力学分析奠定了基础。最后以并联机床为例，运用动力学模型进行了实际计算并绘制了连杆驱动力的变化曲线。

CAD/CAM systems provide the possibility to integrate with NC post-processors, so the NC program can directly execute post-processing in a CAM system. But surveys taken by CAM users indicated that producing a formatted NC program remained to be one of their most perplexing problems. In this paper, based on the general introduction of the NC post-processing, the authors discussed the important roles of post-processing in NC modules, and analyzed some problems in popular post-processors integrated with CAM system. This paper also recommended some famous post-processing products and their features. At last some suggestions and a sample post-processing of parallel machine were given to solve the problems.