A kind of direct-drive type numerical control rotating platform
The utility model belongs to numerical control machine tool technique field, especially relates to a kind of direct-drive type numerical control rotating platform.
Numerical control rotating platform is one of critical function parts of horizontal Machining centers, participates in horizontal Machining centers integrated, participates in the control of reference axis as the 4th axle, and its precision and performance directly affect precision and the performance of main frame.Traditional numerical control rotating platform structure adopts servomotor by shaft coupling or the moving worm and gear auxiliary driving of clearance elimination gear subband, and its shortcoming is complicated in mechanical structure, transmission chain length, and number of parts is many, and vital part requirement on machining accuracy is high, one-tenth produces and makes difficulty, and the cycle is long; Use after a period of time, due to mechanical wear, worm couple repercussion gap increases, and needs machinery adjustment etc.Because the gearratio of worm couple is large, the maximum speed of numerical control rotating platform is restricted in addition, can not meet Digit Control Machine Tool rotatable coordinate axis modern to and the more and more higher requirement of fast feed speed.
Summary of the invention
The purpose of this utility model is: a kind of simple in structure, rotating speed is high, positioning precision is high direct-drive type numerical control rotating platform is provided.
The technical solution of the utility model is: a kind of direct-drive type numerical control rotating platform, comprise the base that returns to Chinese Taiwan, rotary table, torque motor and hydraulic locking apparatus, torque motor directly drives rotary table rotation, torque motor stator is fixedly attached to and is returned to Chinese Taiwan on base by screw, torque motor rotor and rotary table directly link together, on torque motor rotor, angular encoder is housed, rotary table and return to Chinese Taiwan and be equipped with and do bearing and the hydraulic locking apparatus that turntable guide rail is used between base.
Further, described rotary table and return to Chinese Taiwan, between base, six groups of hydraulic locking apparatus are housed, six groups of locking cylinders drive respectively hydraulic locking apparatus to lock rotary table.
The beneficial effects of the utility model are: the utility model directly drives rotary table rotation by torque motor, realize the rotation location of rotary table, have overcome the shortcomings of traditional numerical control rotating platform, manufacturing structure is simple, and assembly period is short, and rotating speed is high, precision is high, and precision stability is good.1, rotary table is directly driven by torque motor, there is no intermediate transmission link, realizes " zero " backlass, because torque motor has high static state, dynamic load rigidity, under high speed rotary motion, has very high positioning precision and repetitive positioning accuracy; 2, torque motor directly drives rotary table, and larger moment of torsion can be provided, and participates in turning, realizes turnning and milling complex function; The closed-loop control of 3, senior angular encoder being installed realizing rotary table, completes high-precision location and calibration; 4, simple in structure, installation and debugging are convenient, are convenient to maintenance maintenance.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Can find out from structural representation of the present utility model shown in Fig. 1, the utility model comprises the parts such as the base 1 that returns to Chinese Taiwan, rotary table 6, torque motor, bearing 4, angular encoder 5, hydraulic locking apparatus 7 and motor water-cooled device 8, and torque motor contains torque motor stator 2 and torque motor rotor 3.Torque motor stator 2 is fixedly attached to and is returned to Chinese Taiwan on base 1 by screw 9, torque motor rotor 3 directly links together with rotary table 6, torque motor directly drives rotary table 6 to rotate, there is no intermediate transmission link, realize " zero " backlass, torque motor can provide compared with high pulling torque, rotary table can participate in cutting, when realizing the 4th s function, coordinate lathe tool, can realize turnning and milling complex function.Because torque motor has high static state, dynamic load rigidity, under high speed rotary motion, there is very high positioning precision and repetitive positioning accuracy.Angular encoder 5 is housed on torque motor rotor 3, realizes the closed-loop control of rotary table by senior angular encoder 5 is installed, complete high-precision location and calibration.Rotary table 6 and returning to Chinese Taiwan is equipped with between base 1 and does multiple bearings 4 and 7, six groups of locking cylinders of six groups of hydraulic locking apparatus that turntable guide rail uses and drive respectively hydraulic locking apparatus 7 to lock rotary table 6.In the time that rotary table 6 is motionless, drive hydraulic locking apparatus 7 to carry out 6 forced lockings to rotary table 6 by six groups of locking cylinders; In the time that rotary table 6 need to rotate, Hydraulic Cylinder hydraulic locking apparatus 7 unclamps rotary table 6.
Rotary table 6 of the present utility model is connected with torque motor rotor 3, saves intermediate link, reduces loss, and speed is high, the high speed 80r/min(tradition of the speed that the returns to Chinese Taiwan Worm Wheel System general 5r/min of rotating speed that returns to Chinese Taiwan); Torque motor stator 2 is fixed on and returns to Chinese Taiwan on base 1, realizes the closed-loop control of rotary table by senior angular encoder 5, makes rotary table under high speed rotary motion, has very high positioning precision and repetitive positioning accuracy.