UA21945U - Device for high-altitude fixation of chocks of forming rolls at change - Google Patents

Abstract

A device for high-altitude fixation of the chocks of forming rolls at change includes spring-loaded rods, which are located in the through vertical openings of the lower chocks located from two sides symmetrically relative to the axis of each of their chocks and made with possibility of interaction of their upper parts with top chocks. Furthermore, the device is equipped with the supports, which are articulated with the drives of their reciprocating displacement, and each lower chock is made with protrusions located above each other, in which are made the mentioned vertical coaxial openings, in this case each rod is made with a collar, and driving supports are located in the lower parts of the protrusions, and each of the supports is made with possibility of horizontal reciprocating displacement and with possibility of contact with the lower part of corresponding rod, collar and spring of which are located between the protrusions.

Description

Description of the invention

The useful model refers to the field of metallurgical engineering, namely, rolling production 2 and can be used in cold and hot rolling mills.

As an analogue, a device was selected for fixing the cushions of rolling rolls to each other during transshipment according to (patent

Japan Mo51-85136 class 12 C 211.4), containing fixing elements in the form of movable rods with support elements with rollers at the ends. The rods are located in through vertical holes made in the lower cushions. During transshipment, the transshipment guides are raised by special hydraulic cylinders, the rollers rest 70 degrees on the guides, and the ends of the rods are extended from the cushions of the lower roll and rest against the cushions of the upper roll, holding the upper roll with the cushions. Rods with rollers accept the weight of the upper roll with pillows and ensure a strictly certain distance between the axes of the rolls during transshipment.

At the same time, the points of connection of the rods with the rollers, which perceive the full weight of the rolls with pillows during transshipment, are made for their strength with significant dimensions, which requires an increase in the dimensions of the rods and rollers and, as a result, of the lower pillows, which leads to an increase in dimensions the cage as a whole and the increase in the cost of the equipment. This is a drawback of this solution.

As a prototype, a device was selected for fixing the pads of the rolling rolls to each other during transshipment (author's certificate Мо975128, МПК В21831/10), which contains movable rods that move in the vertical boring of the lower pad. At the upper end of the rod, supporting elements are cantilevered with the possibility of turning them in the vertical plane with the help of a hinge. The supporting elements are rectangular beams.

After producing the working resource with a set of rolls, the cage is stopped and the set of rolls with pillows is rolled out. For this, the drive of the fixing device removes the support elements from the bore of the pillow of the upper roll, the pillow descends on the support elements and with its weight rotates them in the places of hinge connection with the 22 rod into a horizontal position until they fall on the support surfaces of the lower pillows. Thus, the supporting elements begin to perform the role of rigid spacers between the pillows, which guarantees the height fixation of the pillows relative to each other during the transshipment of the rolls.

Compared to the analogue, the load-bearing capacity of the rods with supporting elements in the prototype is higher due to the increased bearing surface of the hinged supporting elements, which perceive working loads, and o provides higher durability and reliability of the device without increasing the dimensions of the parts and without increasing the cost of the equipment.

However, the reliability of the device remains insufficient due to the fact that the specified support elements and the hinges, in relation to which they must rotate, are located between the upper and lower cushions in the zone, which during the operation of the equipment is subject to intensive contamination by the remains of lubricating and cooling materials and metal scum. These substances intensively accumulate during the rolling process in the narrow spaces of the structure, including on the surfaces of the pillows, and during transshipment create resistance when turning the mentioned beams. In addition, the lower surfaces of the beams are subjected to intensive wear and tear due to the impact of scale on the supporting surface of the lower pillows, to which they are pressed by the weight of the upper roll set with pillows, which "reduces the durability of these elements and the device as a whole. Thus, the disadvantage of the prototype is unsatisfactory reliability and durability. c The useful model is based on the task of increasing the reliability and durability of the device for high-altitude

From" fixation of the cushions of the rolling rolls.

This task is solved at the expense of the technical result, which consists in the elimination of the forces that prevent the movement of the movable support elements of the device in working positions.

To achieve the above-mentioned technical result, a device for height fixation of rolling pads on rolls during transshipment, which includes spring-loaded rods, which are placed in through vertical holes of the lower pads, located on both sides symmetrically with respect to the axis of each of the pads, and made with the possibility of interaction of their upper parts with upper cushions, according to the useful model, the device is equipped with stops, which are articulated with drives for their reciprocating movement, and each lower cushion is made of "yz" 20 protrusions placed one above the other, in which the mentioned vertical coaxial holes are made, while each rod is made with a shoulder, and the drive stops are located in the lower parts of the pillows, and each of the stops is made with the possibility of horizontal reciprocating movement and with the possibility of contact with the lower part of the corresponding rod, the shoulder and spring of which are located between the protrusions. Moreover, the drive for reciprocating movement of the stop is made in the form of a horizontal hydraulic cylinder, the rod 22 of which is connected to this stop. c As a result of a comparative analysis of the proposed device for height fixation of rolling roll cushions with the prototype, it was established that they have common characteristics: - spring-loaded rods placed in through vertical holes of the lower cushions, located on both sides symmetrically with respect to the axis of each of the cushions; 60 - the rods are made with the possibility of interaction of their upper parts with upper pillows; as well as distinguishing features: - the device is equipped with stops that are articulated with drives for their reciprocating movement; - each lower pillow is made with protrusions placed one above the other, in which the mentioned vertical coaxial holes are made; because - each rod is made with a rim;

- drive stops are placed in the lower parts of the pillows; - each of the stops is made with the possibility of horizontal reciprocating movement and with the possibility of contact with the lower part of the corresponding rod; - the edge and the spring of the rod are located between the protrusions; - the drive for reciprocating movement of the stop is made in the form of a horizontal hydraulic cylinder, the rod of which is connected to this stop.

Thus, the proposed device for height fixation of rolling roll cushions has a new structural design of nodes and parts, new connections of nodes and parts, as well as new mutual arrangements of elements and nodes. 70 There is a cause-and-effect relationship between distinctive features and the technical result achieved.

Due to the fact that the device is equipped with stops, which are articulated with the drives of their reciprocating movement, and each lower cushion is made with one above the other protrusions, in which the mentioned vertical coaxial holes are made, while each rod is made with a shoulder, and the drive stops are placed in the lower parts of the pillows, and each of the stops is made with the possibility of horizontal 7/5 reciprocating movement and with the possibility of contact with the lower part of the corresponding rod, the edge and spring of which are located between the protrusions, it became possible during horizontal reciprocating movement of the stop during transshipment to clean from scale and other impurities on its front surface, that part of the surface of the pillow along which the lower surface of the stop moves, which reduces the frictional forces between the stop and the pillows and increases the durability and reliability of the stop and the device as a whole.

Exclusion of at least one of them from the specified set of distinguishing features will not ensure the achievement of a technical result.

The claimed technical solution is not known from the prior art and is therefore new.

The claimed useful model is industrially applied, because its technological and technical implementation does not present difficulties. According to this technical decision, the technical project for the reconstruction of the 2000 ov Severstal steel mill (Cherepovets) was completed.

Thus, the applied utility model can be granted legal protection, because it is new and industrially applied, that is, it meets the criteria of a utility model.

A useful model is explained by drawings:

Fig. 1 - a general view of the device for height fixation; Fig. 2 - view A (working position during rolling);

Fig. 3 - view A (working position during transshipment). -

The device for height fixation of rolling roll cushions consists of rolls 1 installed in the upper Ge! pillow 2 and lower pillow 3. In pillow C, projections 4 (Fig. 1) are made, in which coaxial vertical holes are made and rods 5 with sides 6 are installed with the possibility of movement. Moreover, rods 5 pass through -- zv Protrusions 4 of lower pillows Z . In the body of each upper pillow 2, a recess is made with dimensions that ensure the free placement of the upper end of the rod 5. At the same time, a compression spring 7 is mounted on each rod 5, which rests with its lower side on the lower protrusion 4 of the pillow 3, and its upper side on the edge 6 rod 5. The compressive force of the spring 7 is chosen such that it is able to keep the rod 5 in a raised state, pressed against the pillow 2. In the lower part of the lower pillows C, hydraulic cylinders 8 are horizontally installed. when the rods of the hydraulic cylinder 8 are extended, the stop 9 is placed under the pt) with the lower end of the rods 5, preventing their displacement under the influence of the weight of the upper cushions 2.

The device for height fixation of rolling roll cushions during transshipment works as follows. with In the process of rolling, rolls 1 are reduced to the technologically necessary distance to obtain a strip of a certain thickness. The rods of the hydraulic cylinders 8 are inserted, the stops 9 are removed from under the movable rods 5 (Fig. 2). At the same time, the rods 5 are constantly spring-loaded by compression springs 7, are in a raised position, their upper ends are located in the recesses of the upper pillows 2. When the interroll gap changes and the position of the pillows relative to each other changes, the position of the movable rods 5 changes accordingly. - After rolling a certain number of strips, the rolls wear out and they are replaced with a new set of rolls.

Ge) To do this, the cage is stopped and the used set is dumped.

To carry out transshipment, the upper roll 1 is first raised by the balancing mechanism, while the movable rods 5, spring-loaded by compression springs 7, move to the uppermost position. Then sp pressure is applied to the hydraulic cylinders 8, their rods push the stops 9 under the lower ends of the rods 5. After that, the hydraulic cylinders 8 are disconnected and the quick-release connection of their power supply is disconnected from the hydraulic system. After that, the upper roll 1 is lowered onto the rod 5, which, under the weight of the upper roll 1, is lowered onto the stops 9, while the upper roll 1 is fixed in relation to the lower roll and the set of rolls is ready to be rolled out of the cage (Fig. 3).

Thus, using rolling roll cushions in the device for height fixation, technical solution c according to the utility model became possible by reducing the forces preventing the movement of movable support elements, increasing their reliability and durability, as well as the entire device for height fixation as a whole.

Claims (2)

The formula of the invention 1. A device for height fixation of rolling roll cushions during transshipment, including spring-loaded 65 rods, which are placed in through vertical holes of the lower cushions, located on two sides symmetrically with respect to the axis of each of the cushions and made with the possibility of interaction of their upper parts with the upper cushions, which differs in that the device is equipped with stops, which are articulated with drives for their reciprocating movement, and each lower cushion is made with protrusions placed one above the other, in which the mentioned vertical coaxial holes are made, while each rod is made with a shoulder, and the drive stops are placed in the lower parts of the pillows, and each of the stops is made with the possibility of horizontal back-and-forth movement and with the possibility of contact with the lower part of the corresponding rod, the edge and spring of which are located between the protrusions. 2. A device for height fixation of rolled roll cushions during transshipment according to claim 1, which is characterized by the fact that the drive for reciprocating movement of the stop is made in the form of a horizontal hydraulic cylinder, the rod 7/0 of which is connected to this stop. that 2 iv) " (o) "- p - and? ime) - se) sh» sl 60 b5