CNC lathe hydraulic power system of variable speed conditions

CNC lathe hydraulic power station behind the part can be used as a module in the machine tool. When need a tailstock's top bulk processing, can be mounted to the hydraulic tailstock top system, make it become the another operational module, sharing the same hydraulic power system. In machining, when the program to the demand for variable speed operation conditions, numerical control system first announced the stop signal, then the program announced the signal starting fuel supply pump, hydraulic system at the same time, electromagnetic valve, according to the control signal and the variable cylinder oil, make the piston rod out or back, forward gear shifting fork, after putting in place when the gear shift, micro switch, CAM and response signal to the numerical control system, the end of the variable speed, program continues to run down to perform machining. Spindle speed change device module on the spindle box, by the stent, oil cylinder and oil tube, micro switch, etc. Bracket width dimension the same as the spindle box at the top of the scale, the spindle speed change device module in the spindle box above the original used to cover plate with four screw holes, and add to play positioning pin hole positioning for the module. Central stents have clapboard, variable speed oil cylinder fixed on the plate, and is located to manipulation of the sliding gear shaft, and guide shaft coaxial; Oil cylinder piston rod is located within the guide shaft, and gear shift fork through the pin shaft coupling; Shifting fork set on the guide shaft, but under the drive of the piston rod move back and forth along the guide shaft; Guide shaft is hollow and open a guide groove, so that the piston rod and the shifting fork, guide shaft by a pin shaft fixed on the bracket; Two gear shift fork are downward vertical structure, respectively in the corresponding sliding gear shifting the slots. With speed oil cylinder oil supply, the piston rod through a pin shaft drives the sliding fork move sliding gear, make the gears meshing gear, gear are obtained by the convex block on the fork of micro switch cover, announced the gear in place signal, for the change over.

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