During the programming operation of the CNC milling machine, in order to be able to describe the movement form of the machine tool more clearly, the coordinate system and movement direction of the CNC milling machine have been standardized.
1. Provisions on the relative motion of CNC milling machines
In order to allow programmers to determine the machining process according to the part drawing without considering the specific movement state of the workpiece and tool on the machine tool. In addition, it is always assumed that the tool moves relative to the stationary workpiece coordinate system.
2, the equipment coordinate system regulations
When processing parts on a CNC milling machine, the operation of the machine tool is controlled by the CNC system. In order to ensure the displacement and direction of the machine tool movement, this coordinate system is called the calibration coordinate system. The coordinate system of the CNC milling machine adopts the right-hand Cartesian coordinate system.
3. Regulation of the movement direction of CNC milling machine
The movement direction of the CNC milling machine workpiece can show the direction of the distance between the tool and the workpiece. The Z coordinate is that the movement of the machine tool is determined by the spindle that transmits the cutting force, that is, the coordinate parallel to the spindle axis is the Z coordinate.
The X coordinate is generally parallel to the clamping surface of the workpiece. Generally horizontal. This is the main running coordinate of the tool or workpiece positioning plane. The Y coordinate is the coordinate perpendicular to the X and Z axes. Additional coordinate system, if there are other coordinates different from these three coordinates in addition to the basic rectangular coordinate axes X, Y, Z, the additional rectangular coordinate system is designated as U, V, W and P, Q, R this way.