The process analysis of CNC machining center parts processing mainly has the following points:
Determination of the programming origin of the CNC machining center Since the outline of the workpiece is symmetrical with the center of the workpiece, according to the determined origin of the programming origin, the programming origin in the G17 plane is taken at the symmetrical center of the workpiece, and the Z-direction programming origin is taken on the upper surface of the workpiece.
Positioning and clamping of CNC machining center workpieces and selection of tools
1. Selection of the cutter
2. In order to reduce the number of tool changes, the same tool is used for the rough and tip machining of the workpiece in this example.
3. The positioning and clamping of the workpiece of the CNC machining center in Dongguan Since the workpiece is processed in a single piece, a general fixture is used for positioning and clamping during the processing. In this example, precision flat-nose pliers are selected for workpiece clamping according to processing requirements.
Determine the processing parameters The determination of the processing parameters depends on the programmer's experience, the machining accuracy and surface quality of the workpiece, the material properties of the workpiece, the material and shape of the tool, and the rigidity of the tool holder.
When roughing at a given speed, in order to improve productivity, on the premise that the quality of the workpiece is guaranteed, a higher feed speed can be selected. Generally, 100-200m/min is taken, and the outer buckle is roughly added by 1: in order to ensure the requirements of machining accuracy and surface roughness, a smaller feed speed should be selected, generally selected within the range of 50-100mm/min. For example, the feed speed of tip processing is 50mm/min, and the feed speed of tool idle stroke is generally selected at G00 speed or within the range of 600-1500mm/min.
