Numerical control gantry milling machine processing operation rules
1 the workbench
CNC longmen machining center of the table is basically rectangular. The large castings such as worktable, bed, column, beam and ram are made of Meehan cast iron or welded parts. The inner cavity of the castings is honeycomb composite arrangement structure, which is advanced in design. The castings are treated by aging and secondary tempering to eliminate residual internal stress and make the material stable, and ensure the stability of the machining accuracy of the workpiece and the service life of the machine tool.
The gantry consists of a beam and two upright posts. It is divided into three types: fixed beam, segmentalized beam lifting and arbitrary beam lifting by positioning block.
3 the ram
The structure of the ram can be divided into two types: open and closed. The open structure of the ram is clamped on the spindle box through the pressing plate, and the cross-sectional area of the ram is large; The closed type ram is clamped in the spindle box and the cross-sectional area of the ram is small.
4 knife library
The basic types of knife library are turret type, drum type and chain long type.
5. Attachment header library
The machining of large complex parts usually requires many accessory heads. The accessory head is specially designed according to the processing requirements of the workpiece, which is generally divided into right Angle head, lengthened head, special Angle head and universal head.
6 Numerical control System
The CNC system generally adopts SINUMERIK840C and 840D of German SIEMENS company or 31I series of Japanese FANUC company (heidhan, etc.), and the CNC axis adopts full closed-loop control.
The precision of machine tool is the original precision of machine tool without external load. Accuracy is usually expressed in terms of its opposite, the deviation from the ideal state (error for short). The smaller the error, the higher the accuracy.vGuilong manifold blocks