The working table is centered by high-precision double-row cylindrical roller bearings in the radial direction, and a pre-loaded constant current static pressure guide rail is used in the axial direction, with temperature control and temperature protection devices. The appropriate flow rate can be selected according to the load and temperature. When the machine tool is powered off, the accumulator is used for static pressure power-off maintenance. The static pressure pumping station is equipped with two accumulators, which can still supply oil for the static pressure guide rail for 15 seconds after the power is cut off to avoid damage to the guide rail.
The control functions of the numerical control device of the numerical control vertical lathe are divided into three categories:
1. Point control
only control the accurate positioning of the tool or worktable moving from one point to another, and then perform fixed-point processing. The path between points does not need to be controlled. Drilling machines, boring machines, and jig boring machines are used for this type of control.
2. Linear control
In addition to controlling the accurate positioning of the start and end points of the linear path, it is also necessary to control the linear cutting between these two points at the specified feed rate. Milling machines, grinders and CNC vertical lathes are used for this type of control.
3. Continuous trajectory control
can continuously control the joint movement of two or more coordinate directions. In order to make the tool process the curve contour of the workpiece according to the prescribed path, the numerical control device has the function of interpolation operation. Make the motion path of the tool approach the specified contour curve with the smallest error, and coordinate the motion speed of each coordinate direction, so that the specified feed rate is always maintained during the cutting process. There are CNC milling machines, CNC grinders, CNC vertical lathes and machining centers that use this type of control.