SK7450X50 CNC Leadscrew Grinding Machine Type: 200x5000mm This machine is specially to grind various long leadscrews. It can also be used to grind cylindrical surface of the journal by using cooling emulsion instead of cooling oil, if there is no long cylindrical grinder available. Equipped with automatic corrector, the working accuracy for long leadscrews can be increased. The on line measurement for grinding accuracy can be carried out with the help of the drive chain error testing device of the automatic corrector. The work spindle rotation, table traverse, Wheelhead cross feed & dresser vertical feed are driven by 4 independent AC servo motors so as to get 4 controlled axes, 3 axes of which can be effected in sync. The machine base is jointed by both the front bed and the rear bed. The workstock and the tailstock are on the front bed but the wheelstock rests on a carriage which is moves along the rolling guideway located on the rear bed. The master ball screw is the imported hollow ball screw which is cooled by temperature controlled cooling oil. The workpiece is also cooled by the temperature cooling oil in total length to reduce the accumulated pitch error caused by the temperature difference between master ball screw ball and workpiece. All the bearings used on the work spindle, wheel spindle and master ball screws are of firm feedback throttle action and, therefore, these spindles have high hydrostatic rigidity and convenience to adjust and clean. Equipped with various automatic wheel dressers, wheel dressing can be easily carried out. Equipped with a power controlled movable operation panel with can be moved longitudinally along the machine bed and with a power controlled helix angle adjusting device for wheelead, this machine can be operated with a great convenience.
