在数控编程时为了描述机床的运动,简化程序编制的方法及保证记录数据的互换性,数控机床的坐标系和运动方向均已标准化,ISO和我国都拟定了命名的标准。机床坐标系( Machine Coordinate System )是以机床原点O为坐标系原点并遵循右手笛卡尔直角坐标系建立的由X、Y、Z轴组成的直角坐标系。机床坐标系是用来确定工件坐标系的基本坐标系。是机床上固有的坐标系,并设有固定的坐标原点。
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.
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