RU1810165C - Device for bending ends of heated rail - Google Patents

Abstract

Usage: heat treatment of long products. The goal is the expansion of functionality. SUMMARY OF THE INVENTION: the device comprises pivotally mounted on the base (1) levers - grippers (2,3), which are connected to the rod (7) of the power cylinder (8) by means of a link (3, 5) and a three-arm lever (6). From the inner side, cassettes (10, 1.1) are attached to the levers-grips (2,3) by means of connecting rods (9), which are spring-loaded relative to the levers (2,3) by springs (12), screw stops

Description

Figure 1

The invention relates to the processing of metals by pressure and is intended for bending the ends of the rail in an asymmetric plane of greater rigidity, straightening the ends of the rail in a symmetrical plane of lesser rigidity and resulting in straight rail ends.

The aim of the present invention is to expand the functionality by providing adjustment to a given curvature of the bend of the end of the rail,

Fig. 1 schematically shows an apparatus for bending the end of a heated rail; figure 2 is a section aa in figure 1; in Fig.3 is a view along arrow B in Fig.2.

The device comprises hinged grips 2, 3 mounted pivotally on the base 1, which are connected to the rod 7 of the power cylinder 8 pivotally mounted on the base 1 by means of t 4, 5 and the three-arm lever 6.

From the inside, to the levers - grippers 2.3 with the help of connecting rods 9 are attached cassettes 10, 11, which in the vertical direction are spring-loaded relative to the fish. chagov 2,3 springs 12. The upper parts of the cassettes 10,11 interact with the screw stops 13, which are mounted on the levers 2,3. The profiled side jaws are made in the form of a series of separate sections 14, each of which is fixed on a rotary axis 15 installed in the upper part of the corresponding cassette 10 or 11. The rail bearing 17 is also made in the form of separate sections 16. These sections are mounted on a movable vertical the direction of the frame 18, which is placed in the guide 19 and pivotally connected by the lower part to the lever 20 of the second kind, One end of the lever 20 is pivotally connected to the base, 1, and the second to the rod 21 of the additional power cylinder 22, which is also pivotally connected n with base 1, Adjusting wedge pads 23 fixed by pins 24 are installed between the support sections 16 and frame 18. Screw adjusting mechanisms can be installed instead of wedge pads. V

To bend simultaneously the front and rear ends of the rail, two such devices are installed between the rollers of the roller table (not shown in the drawing).

The device operates as follows ..

In the initial position, the levers 2, 3 together with the cassettes 10, 11 and the sections of the jaws 14 are spread apart. The sections of the support 16 are located at the level of the roller table. In this position, the sections of the jaws 14 are adjusted to a predetermined bending path of the end of the

such as a rail along the radius R. To do this, by rotating the screw stops 13, the cartridges 10, 11 are moved up or down in one direction or another. The articulation contributes to this.

the cassettes 10, 11 are connected by connecting rods 9 with levers 2, 3 and the flexibility of the springs 12. The sections of the support 16 are adjusted to the same bending path of the rail end by replacing the wedge pads 23.

In the case of installing screw adjusting mechanisms, the adjustment of the support sections 16 is carried out by the corresponding rotation of the screws.

Heated to austenitization temperature

5 throughout the entire volume of the rail 17 in the position of one hundred on the sole, the roller table is fed into the zone of operation of the two devices, aligning the ends of the rail with respect to them. When the power cylinder 8 is turned on by its rod 7 through three shoulders, the lever 6 and the thrust 4,5 put the levers 2, 3 into a vertical position. The sections of the profiled side jaws 14 are in contact with the inner surface of the sole and neck of the rail 17, making reliable

5 capture of its end.

Then, the master cylinder 22 is turned on, the rod 21 of which pivots up the lever 20. In this case, the frame 18 connected with the lever 20, moving in the guide 19, presses the support sections 16 to the bottom of the rail 17.

carried out with his effort the bending of its end.

During the time after clamping the neck

rail profiled jaws 14, i.e.

during bending and subsequent holding in the clamped state, straightening of the end of the rail in the plane of less rigidity is achieved by changing the stress state and alignment of the stresses in the heated neck metal.

0 After holding both ends of the rail in this position for 2 ... 10 s, all the mechanisms of the devices are returned to the initial position, and the rail with bent ends is fed into the quenching device (in the drawing

5 is not shown). During the cooling process, the ends of the rail are bent to the sole, completely compensating for the preliminary bending of the proposed devices.

The effect of the use of the proposed devices is to significantly simplify their adjustment to a given curvature of the bending of the rail ends and to reduce the metal consumption by reducing the fleet of interchangeable sets of profiled jaws, as well as to improve the quality of rolled products by allowing straightening in two planes.

Claims (1)

Formula for gaining A device for bending the end of a heated rail, comprising hinged gripping levers mounted on the base and equipped with side profiled jaws, kinematically connected to the ram cylinder, as well as the rail support, which is unique in order to expand the functionality by providing adjustment to a given curvature of the bend, it is equipped with a vertically movable frame pivotally connected to it by a lever of the second kind, one end of which is pivotally connected to the base, to olnitelnym power cylinder associated with the other end of said arm, two kasseta0 with rotary axes installed in them, screw stops placed on the corresponding gripping levers, and connecting rods, while the side profiled jaws and the rail support are made sectional, each section of the side profiled jaws is mounted on the corresponding axis installed in the cartridge, each cartridge It is connected with a corresponding gripping lever by means of connecting rods and is spring-loaded to it, installed with the possibility of interaction with a screw stop, and sections of the rail support are mounted on the frame.