数控车床编程的几大要点（Several key points of NC lathe programming）.docVIP

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数控车床编程的几大要点（Several key points of NC lathe programming）.doc

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数控车床编程的几大要点（Several key points of NC lathe programming）

数控车床编程的几大要点（Several key points of NC lathe programming） I. coordinate system of CNC machine tools Numerical control coordinate system is based on the movement of the tool relative to the static workpiece CNC machine coordinate system is used in the right hand of Descartes Cartesian coordinate system, the coordinate axis is X, Y, Z coordinate, as shown below, the provisions of the X, Y, Z three rectangular coordinate axis, the coordinates of the main line of the guide and coordinate various parallel machine tool. According to the right-hand helix principle, we can determine the direction of the three rotating coordinates of A, B, and C. Determination of Z axis coordinates: (1) the standard coordinate axis parallel to the axis of the main axis is the Z coordinate (2) if there is no spindle, the Z coordinate is perpendicular to the workpiece clamping surface. (3) if there are several spindles, an axis perpendicular to the clamping surface is selected as the main shaft and the Z coordinate is determined. The positive direction of the Z axis ---- increasing the direction of the distance between the tool and the workpiece. Determination of X axis coordinates: (1) on a machine tool without rotating tools or workpieces, the X axis is parallel to the main cutting direction and is in the positive direction. (2) on the machine tool for turning the workpiece, the X direction is radial and parallel to the horizontal slider, which is the direction of the tool leaving the center of rotation of the workpiece. (3) on the machine tool of turning tool: if the Z coordinate level is viewed by the tool spindle to the workpiece, the X coordinate is pointing to the right direction; if the Z coordinate is vertical, the main axis of the tool is viewed to the upright column, and the X coordinate is pointing to the right. The Y axis coordinates are determined by the right Descartes coordinate. Two, machine tool coordinate system origin: The machine tool origin is a fixed point on the machine t