SU820946A1 - Tube cold rolling mill stand drive - Google Patents

Description

(54) DRIVE CUSTOM PIPE COLD ROLLING MILL

to be stopped quickly and, continuing to rotate, it moves through the connecting rods to move the working stand. As a result of this, there is a breakdown of certain assemblies and parts of the mill, which leads to long periods just to eliminate the accident. In addition, for the effective operation of the flywheels must have a significant size and weight, which leads to an increase in metal and drive size.

The purpose of the invention is to increase the reliability of the drive.

The goal is achieved by the fact that in the drive of the stand of the cold rolling mill tube containing an electric motor, kinematically connected with it a crank drive gear and a flywheel, there is a coupling coupling composed of two halves, one of which is fixed on the end of the flywheel rotatably mounted on the shaft of the electric motor and the other has a pivotally connected axial movement mechanism electrically interlocked with the electric motor, and its connection with the shaft of the latter is made in the form of splines.

The presence of the clutch and flywheel mounting on the motor shaft allows the flywheel to be disconnected from the motor shaft before it is braked, reduces the weight of the flywheel, and electric locking of the flywheel on and off mechanism eliminates the braking of the drive and stand without first disconnecting the flywheel from the motor shaft, increases the reliability of the drive and reduces its size.

FIG. 1 schematically shows the drive of the working stand of the cold-rolling mill; a cross-section; in fig. 2 shows section A-A in FIG. one.

The drive of the working stand of the cold rolling mill tube contains an electric motor 1, the shaft 2 of which is connected to it by a clutch 3 and mounted on bearings 4 in case 5. Gears 6 are located on the shaft 2 of the electric motor, which are in engagement with the toothed rims 7 located on the disks 3, which are mounted on bearings 9 and 10 in the casing 5. The discs carry pins 11 and mounted on them through bearings 12 connecting rods 13 of a crank drive transmission, which are connected to cage 14. On shaft 2 of an electric motor through bearings 15, rotatable swings 16. The actuator has a clutch, consisting of halves 17 and 18. Half 17 is attached to the flywheel end (or formed integrally with it), and the other movable half 18 is connected to the shaft 2 through the splines 19 and has a mechanism of axial movement.

The mechanism of axial movement of half of the coupling 18 is made in the form of a rod 21 connected to it through a check 20, a hydraulic cylinder

22 with a rod 23 and a swivel coupling 24 connecting the rod 23 with the rod 21.

A hinge 25 is mounted on the hinge clutch 24, with the help of which one of the electric sensors 26 or 27 triggers, which is connected with the control of the electric motor 1.

The device works as follows.

The signal to turn on the stand drive is fed from the console to the control valve (not shown) by the hydraulic cylinder 22. As a result,

23 moves, in the direction towards the flywheel 16, by means of a hinge coupling 24, a rod 21 connected by a check 20 with the movable half 18 of the coupling. The movable half of the coupling 18, moving along the splines 19 of the shaft 2, its hollows engages with the tabs on the half of the coupling 17 fixed on the end of the flywheel 16 mounted on bearings 15 and connects the flywheel to the shaft 2.

This line 25 acts on the sensor 26, which sends a signal to turn on the electric motor 1, which causes the shaft 2 to rotate and, through gears 6 and rims 7, drives 8 with crank fingers 11. At this time, the cage 14 connected to the fingers 11 by rods 13, makes reciprocating motion. The flywheel rotates together with the shaft 2, performs the role of the accumulator of excess energy - perceived the energy of the movement of the cage during braking and giving it during acceleration and, thereby, increasing the uniformity of the drive and reducing the required power of the electric motor 1.

Since the flywheel 16 is mounted on the drive shaft 2, with the same effect of increasing the uniformity of the drive and reducing the required power of the electric motor, its flywheel is less than a square gear ratio between gears 6 and gear rims 7 than when the flywheel is mounted on crank shaft, - due to which the weight and dimensions of the drive are significantly reduced. If it is necessary to stop the cage, a signal from the console or the emergency sensor is fed to the control spool (not shown in Fig.) By the hydraulic cylinder 22, whereby the rod 23 moves the clutch 24, the rod 21, and the checks 20 to the movable half 18 of the clutch in the direction from the flywheel, output its engagement with the protrusions on the half 17 and detaches the flywheel from the shaft. At the same time, the ruler 25 hits the sensor 27, which gives a signal to stop the electric motor. The engine is braked, stopping the drive and the stand. In this case, the flywheel 16, continuing to rotate on the bearings 15, does not affect the shaft 2 and does not prevent the drive and the stand 14 from stopping, which allows them to be braked during a time that does not exceed the braking time of the non-motor drive. This MfciM improves the reliability of the drive with flywheel.

The proposed drive of the cold rolling mill working stand allows to reduce the metal storage capacity of the mill, increase reliability, reduce downtime and increase its productivity.

Claims (2)

1. The patent of Germany 1427951 ,, cl. 7a, 21/00, 1969.,. , 2. Authors certificate of the USSR 136292, cl. B 21 B 21/00, 1960.