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.

Correlative error is a kind of error between the cutter locations. This text presents a detailed analysis about correlative error in the principal axis method (PAM) that is a strategy of tool positioning for five-axis machining. It points out all the strategies based on linear projection can not avoid this interference and cannot be disregarded especially in the strategies with large stepover. Accurate calculating is made individually on linear and curve feed and formulae are developed. The author also gave the available application range of PAM and the algorithm for estimating correlative error.

由于并联机构铰链间隙的存在，使并联机构的实际精度和刚性明显减小。本文论述了采用冗余驱动技术改善并联机构精度的研究。首先分析了可以将铰链间隙对并联机构运动误差的影响转化为杆长偏差对机构误差的影响，然后通过分析得出：由于铰链间隙的影响，并联机构运动空间是空间几个球环的交集，采用数值法，利用球坐标积分求出误差空间的体积大小，最后对具有相同结构参数的非冗余和具有冗余驱动的两种并联机构，在同样的工作空间内分别计算了误差分布，得出采用冗余驱动技术可以有效减小因铰链间隙而引起的并联机构运动误差的结论。

将圆环面刀的实际切削刃和刀具包络的特征线联系起来，利用简单的特征线方程对实际切削刃进行了精确的数学描述。推导出了刃形误差的表达式，对刃形误差及其影响因素进行了定量的分析，指出刃形误差是一种宽带误差，在应用主曲率匹配法进行宽带加工时必须进行校验。

针对一种三自由度的并联机构采用Lagrange方程建立了动力学方程，得出了机构驱动力显式解。用计算机程序模拟了动平台做圆周运动时驱动力的变化情况以及机构简化所产生驱动力误差的大小，给出了可以对机构进行简化的条件。分析了机构的结构参数与驱动力的关系，为这种机构动力学特性的深入分析和结构优化设计提供了参考。

以6—SPS 并联机构为例，基于路径跟踪原理，提出一种求解并联机构位置正解的欧拉预估—牛顿迭代法。该方法通过求解并联机构位姿方程的微分初值问题，经过路径跟踪，可求出指定杆长动平台的正确位姿，并可求出中间结果。经过实例验证，该方法具有快捷而准确，收敛范围大，计算结果可靠的特点。