SU1258535A2 - Apparatus for testing rolling mill spindles - Google Patents

Description

The invention relates to rolling production, rolling mill test devices, in particular the spindles of the main drives of working stands, can most effectively be used in design testing and the study of the effect of dynamic loads on spindle joints and is an improvement of the device according to Auto., No. 1161202.

The purpose of the invention is to increase the reliability of the load characteristics by eliminating the application of force, arising {X when pressing and sliding the grip associated with the Load Simulators on the friction load disk.

Figure 1 shows the device, a general view; in fig. 2 - section A-A on. FIG. one; in fig. 3.- section BB in FIG. figure 4 - section. B-B in FIG. 2; in fig. 5 shows the node I in FIG. one; in fig. 6 - figure of GG in figure 1 ;; figure 7 - section dD in figure 6; FIG. 8 is a sectional view E — E of FIG. 7; in fig. 9 - disk unit with a stopper and a grip, a slit.

The device is mounted on a base 1, with a variable speed drive 2 through a flat shank coupling 3 connected to the drive head of spindle 4 and the insert 5 is made in various sizes to simulate hinge wear and acceleration tests.

On the spindle shaft, there are: detachable sectional flywheel masses 6 for changing the moment of inertia of the spindle. To balance the spindle, a supporting bearing 7 is used, the pins of which are located in the suspension socket 8, which is coupled through the studs 9 and the connecting rods 10 with springs 11, which rest on the levers 12. The latter are pivotally connected to the uprights 13. Between the levers and the uprights are located the force sensors 14, and on racks, adjustable guides 15 are mounted. 8. Force sensors are Heiai in the form of glasses 16, inside of which the strain element 17 is located.

Two supporting strings are connected to the thrust bearings 7 through the bar 18.

19 of spring steel, which in turn are associated with sensors

20, mounted on the plate 21, and the remote roller 22, abutting against the body. The plate 21 is mounted on the rack 23 with bolts 24. The spindle head 25 is connected to the sleeve 26, which is mounted on

the shaft 27 through the sleeve 28 and from mutual twisting is locked by a pin 29. The supports 30 of the shaft 27 are fixed to the frame 31 connected to the base 1 by means of pins 32 and a guide 33.

The shaft 27 is rigidly connected with the means of loading the spindle, made in the form of a friction load, which has disks 34 with friction linings 35. The disks 34 are rigidly mounted relative to the shaft 27, and the disk 36 is hinged on the shaft 27, while the disks 34 and 36 are compressed by springs 37 abutting the washer 38. The disk 36 interacts with the grip 39

via spring-loaded stopper

40, equipped with a trigger mechanism with a spring-loaded latch 41 and a pivotally mounted dog 42 located in the disk opening. The gripper 39 is connected to a braking means with a piston 43, which is pivotally suspended on the frame 31 and has an actuator 44 for switching on and a return spring 45. The gripper 39 is connected to the pneumatic cylinder 46,

and the piston 47 is pivotally connected to paired pneumatic cylinders 48, pivotally suspended on the plate 49, which serves as the base of the braking means. The rotation of the plate 49 is limited to the stop 50,

mounted on frame 31. A spring 51 is mounted on the shank of the piston 47, the pneumatic cylinder 1 46 and the bar 52 connected to the plunger 53 by the pneumatic cylinder 54 are located near the housing. To adjust the size of the gripping stroke 39 and the piston 47, the washer 55 serves.

The pneumatic cylinders 46, 48 and 54 are connected to the air distributor 56 by pipes, with which the cylinders can be successively connected to the Compressed air line.

On the shaft 27, which is structurally made of two parts connected by a clutch, additional ground masses 57 are placed.

The device works as follows.

Before switching on the device according to the test program, the appropriate number of sections of the fly-weight masses 6 and 57 is determined, certain dimensions of the insert 5, sleeve 28

and balancing springs 11. By adjusting the position of the frame 31 in height using the studs 32, the required spindle tilt angle is about (to the horizon, and the plate 21 moves up to the stop of the remote roller 22 into the spindle shaft, after which the bolts 24 are tightened. Since the center of rotation of the plate 21 is on the same vertical With the center of rotation of the connecting spindle 4, the strings 19 and the sensors 20 at all spindle angles occupy the same position relative to the support bearing 7. Then, by tightening the springs 37, the magnitude of the stopper torque of the load is adjusted. After these settings, drive 2 is turned on and oscillography is performed, for example, force and displacement using sensors 14 and 20. When moving (beating) support bearing 7 in two planes, each string 19 transmits only one axial displacement to sensor 20, freely bending cn in the transverse direction.

To record the parameters under the braking means, the braking device 44 is turned on. In this case, the plate 49, which serves as the basis for the braking means, turns around the hinge on the frame 31 and sits on the stop 50, so that a gap remains between the grip 39 and the disk 36. Pre-drowned

.c disk spring-loaded stopper 40 that holds the working load on the spindle.

lives the end of the retainer 41 entering the annular groove of the stopper 40, and cannot engage with the catch 39 until the trigger is activated. When the pawl 42 is gripped on the grip 39, it turns around the hinge and pulls the retainer 41 out of the annular groove of the stopper 40 by the forked end. Under the action of the spring, the stopper 40 pushes out of the disk 36 and engages with the grip 39. The radial forces from the side of the disc 36 to capture 39 from 10

15

thirty

20

25

there are no distortions in the imitating loads associated with it. Placing the trigger 42 of the trigger directly behind the stopper against the direction of rotation of the disc 36 provides the maximum time for the stopper 40 to fully extend during the turn-around time of the disc. This eliminates the possibility of partial, incomplete engagement and deformation of the edges, as well as the direct collision of the gripper 39 with the stopper 40.

The locking of the disc 36 is accompanied by the movement of the gripper 39 by the amount of the path of the piston 43 up to the stop in the washer 55, while the compressed air is pushed out of the cavity of the pneumatic cylinder into the main. Depending on which of the elastic elements of the braking means is connected at the moment of locking, the torque increases according to different laws. When compressed air is fed into the pneumatic cylinders 48, the force on the gripper 39 increases from zero to a maximum according to the sine law. When the compressed air is supplied to the pneumatic cylinder 54, the force increases in proportion to the gripper path 39, when connecting the wadded air to the pneumatic cylinder 46, the force at the hook is constant.

According to the law of change of force on the gripper 39, the torque of the loader is also changed, imitating FIG. 7 shows a serial connection circuit of pneumatic cylinders 46 and 48 and springs 51, however, the connection circuit of these elastic elements can be made in any combination: single, in pairs and all at once, to achieve a variable characteristic and load.

Compared with the known, the proposed device allows to increase the reliability of the loading characteristics and, consequently, the effectiveness of the rolling mill spindle tests.

2

BB

Fig.Z

Bb

.

FIG.

a go l turn

ilpindle

23

FIG. five

gd

39

OMD / L

Fig.b

five

(AND

003

F "/ 7

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F1 / 1.8

6o3dt / x

Editor O. Golovach

Compiled by M. Korovin

Tehred A. Kravchuk Proofreader S. Shekmar

Order 5061/10 Circulation 518 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

.9

Claims (1)

DEVICE FOR TESTING THE SPINDLE OF THE ROLLING MILL by ed. St. No. 1161202, characterized in that, in order to increase the reliability of the loading characteristics, it is equipped with a spring-loaded stopper interacting with the gripper installed in the disk and having a trigger made in the form of a spring-loaded lock and a dog connected to each other, while the dog is installed directly behind stopper.