根据工件坐标系向机床坐标系的坐标变换过程，说明对刀操作的作用和原理。
Based on the switch process of work piece coordinate system to machine coordinate system, explained the function and principle of aiming at tool operation.
最后建立了五坐标数控机床不同结构类型的坐标转换(工件坐标系—机床坐标系)数学模型。
Lastly, the mathematical models of coordinate conversion between workpiece coordinate system and machine coordinate system are represented.
实际应用结果表明，该方法精确地定位了毛坯在机床坐标系中的位置，并改善了毛坯加工余量的分布情况。
The practical result shows that workblank is accurately located in the coordinate of machine tool and the sum of machine allowance is minimum.
还进一步建立了锥形砂轮磨削前刀面和后刀面时的刀位轨迹模型，并研究了刀位轨迹与机床坐标系的转换关系。
Moreover, the tool paths models of wheel which grinding are builded and the post-processing technique for coordination transfer is studied.
通过读取系统变量可以灵活地确定每一个轴在机床坐标系中的固定点；通过读取系统变量将PLC状态位作为NC宏程序跳转的判断条件；
Via reading system variables fixed point of axes can be determined in machine coordinates system: Via reading system variables PLC state bit is condition of criterion as NC macro-program goto;
以数控车床为例，分析了数控机床使用中各种坐标系、参考点及其相互关系，从实用角度介绍了几种常见的对刀方法。
Based on a nc machine tool, the coordinate system, reference point and their relations are analysed. Several useful presetting cutter methods are also presented in this paper.
文章通过建立各中间坐标系，用齐次矩阵方法详细论述了两种典型5轴数控机床空间运动算法。
In this paper, the spatial kinematics algorithms of two typical 5-axis NC machines have been proposed with the foundation of intermediate coordinate systems and the homogeneous matrix.
应用数控机床加工零件，当零件外形简单，编程时可设置一次工件坐标系（编程原点），即可完成零件的加工；
When using CNC machines to process the part, it can set the part reference frame (the origin of programming) once to complete the process if the outline of part is simple.
实现卧式加工中心机床在零件加工过程中，工作台任意角度旋转后，工件坐标系原点得到自动补偿与设定。
During machining on the horizontal machining center, the automatic compensate and setting of the workpiece coordinate origin is performed after the workbench's arbitrary Angle revolving.
对面齿轮的磨削加工机床进行了研究，从建立加工坐标系入手分析了磨削机床设计原理，并在此基础上初步建立了磨削机床的几何模型。
Grinding machine of Face-gear was studied. Based on the manufacture coordinates, the theory of grinding machine design was analysed and the model of grinding machine was set up.
对面齿轮的磨削加工机床进行了研究，从建立加工坐标系入手分析了磨削机床设计原理，并在此基础上初步建立了磨削机床的几何模型。
Grinding machine of Face-gear was studied. Based on the manufacture coordinates, the theory of grinding machine design was analysed and the model of grinding machine was set up.
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