SU439326A1 - Feeder and turn mill tube cold rolling - Google Patents

Description

The invention relates to ancillary equipment for a cold-rolling mill tube, in particular to a feed and rotation mechanism.

A known mechanism for feeding and turning the cold rolling mill tube includes a movable screw associated with the chuck of the workpiece, a nut sitting on it, a drive for turning the nut from the rotor of the hydraulic motor, a shaft of rotation for turning the chuck of the workpiece, its motor with a rotor, a spindle of the front cartridge and the hydraulic motor with a rotor for turning the pin. In the known mechanism, the centrifugal masses of the kinematic supply and rotation chains are significant, since the drive takes place through a series of gear wheels, and the rotor mass of the known hydromotors is large. In addition, the constancy of the angle of rotation leads to intense wear of the same caliber section, on which the pipe outlet zone falls after the turn.

The aim of the invention is to reduce the flywheel mass in the chain of the mechanism and provide a variable angle of rotation of the pipes. To achieve this, the nut is made with an eccentric flange, the rotor of the motor turning the nut with its mounting hole is placed on the flange of the nut, and the oversize sleeves are installed on the steering shaft and spindle of the front cartridge, provided with an eccentric rim under the mounting holes of the rotors of the hydraulic motors.

FIG. 1 presents the proposed mechanism, a general view; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. one; in fig. 4 shows a section along BB in FIG. one; in fig. 5 is a section along G ‑ Y in FIG. 2

The proposed mechanism comprises a movable feed screw 2, a nut 3 mounted thereon, associated with the workpiece cartridge 1, a nut rotation drive from a hydraulic motor 4 with a rotor 5,

rotation shaft 6, its hydraulic motor 7 with the rotor 8, the spindle 9 of the front cartridge 10 and the hydraulic motor I with the rotor 12 for turning the spindle. The nut 3 of the feed screw 2 is fixed in the support 13 and has an eccentric flange

14, on which the rotor 5 of the motor 4 is placed with its mounting hole, The rotor 5 is made in the form of a convex triangle and provided with rollers 15 placed in its radial grooves 16. These rollers serve to seal the radial gaps between the rotor tops and the stator 17, and also synchronize the movement a rotor in the working cavity A of the hermetic housing formed by the stator 17 and the end caps 18 of the hydraulic motor 4.

On the shaft of rotation 6 and the spindle 9 of the front chuck 10, there are roller clutches of overtaking 19 and 20, the caled of which is equipped with an eccentric rim 21 and 22 under the mounting holes of the rotors 8 and 12 of the hydraulic motors 7 and 11,

i.e. eccentric rim 21 overtaking clutch 19

placed inside the rotor 8 of the motor 7, and the eccentric rim 22 of the overtaking clutch 20 is placed inside the rotor 12 of the motor 11, and the rotors 8 and 12 are made similar to the rotor 5 of the motor 4.

When the mechanism is turned on, the fluid from the pumping station 23 via pipelines 24 enters the cavities of the hydraulic motors 4, 7 and I. Under the action of the working fluid pressure, the rotors 5, 8 and 12 of each of the hydraulic motors come into planetary motion. At the same time, the rotor 5 rotates the nut 3 of the feed screw 2 and thereby feeds the workpiece 25 through the cartridge 1. The rotor 8 of the motor 7 rotates the eccentric rim 21 of the roller clutch of the overtaking 19, the coupling is jammed and the movement is transmitted to the sprocket 26 of this coupling and through keyed connection 27 - to the rotation shaft 6. When the hydraulic motor 7 is stopped, it is braked by means of the spool hydraulic system (not shown in the drawing). After braking with the liquid, the rotor 8 stops the rim 21 of the roller clutch, and at the expense of overrun the sprocket 26 provides the required change in the angle of rotation of the workpiece 25. At the same time as the workpiece 25 is rotated, the finished pipe 28 coming out of the mill also rotates the eccentric rim 22 overtaking clutch 20; this clutch is wedged, and movement is transmitted to the sprocket 29, which rotates the front spindle 9

g Atron 10 and the finished pipe 28. Ready pipe passes through the front cartridge and through the hole in the central part of the sprocket 29 of the overtaking sleeve.

The feeding and turning takes place at the moment of opening the sheds of work roll gauges. The feed and rotate synchronization with the stand position is performed by a spool device (not shown in the drawing) belonging to the pumping station 23. Reversing and accelerated movement are also carried out with the help of the spool device.

Subject invention

A feed mechanism and rotation of the cold rolling mill for pipes, including a movable screw associated with the chuck of the workpiece, a nut sitting on it, a drive for rotating the nut from the rotor of the hydraulic motor, a shaft of rotation of rotation of the nut, its hydraulic motor with a rotor, the spindle of the front cartridge and the hydraulic motor a rotor for turning the spindle, characterized in that, in order to reduce the flywheel mass in the chain of the mechanism and provide a variable angle of rotation of the pipes, the nut is made with an eccentric flange, the rotor of the motor of rotation of the nut with its mounting hole It is placed on the flange of the nut, and overtaking sleeves fitted with an eccentric rim under the mounting holes of the rotors of the hydraulic motors are installed on the turn shaft and spindle of the front cartridge.

f

21

nineteen

/ 7

Fig 3