SU1507466A1 - Stand of rolls - Google Patents

Abstract

The invention relates to ferrous and non-ferrous metallurgy, namely, rolling stands for the production of strip, varietal and shaped, including high-precision, sections with constant and variable sections along the length of the strip. The purpose of the invention is to simplify the stand design by using existing adjustable brake devices to create and adjust the axial tension in thrust bearings, increase the durability of thrust bearings by reducing the axial forces acting on them during the rolling process, improving rolling accuracy and expanding the technological capabilities of the stand. Making the chevron wheel 11 of the two helical gears 12 and 13 ensures that the direction of the axial forces acting on the thrust bearings is constant and independent of the direction of the axial components of the rolling force. However, these forces are reduced by 5-11 times. The gears 12 and 13 can, by means of a movable key, each individually or jointly, be associated with the work rolls 1. The roll brakes and movable keys are controlled from spaced loops installed between the pillows and the bed in the direction of the axes of the rolls. This makes it possible to ensure, during the rolling process, a constant ratio of the axial component of the rolling force to the axial force of the helical gear during the rolling process by changing the torque points on the rolls and the direction of the axial forces in the helical gears of the gears 12, 13 and 20. 1 hp f-ly, 6 ill.

Description

(21) 4343858 / 31-02

(22). 12/15/87

(46) 09/13/89. Bul Number 34

(72); B.V. Panov, V.V. Gaidabura,

B.C. Nagornov, A.B. Grossman

and Yu.R. Schwabauer

(33) 621.771.2.06 (088.8)

(56) USSR author's certificate

No. 732522, cl. B 21 B 13/00, 1980.

USSR Author's Certificate No. 804150, cl. B 21 B 13/00, 1981.

USSR Author's Certificate No. 1043964, cl. B 21 B 13/00, 1983.

(34) ROLLED STAND

(57) The invention relates to ferrous and non-ferrous metallurgy, namely, rolling stands for the production of strip, varietal and shaped, including high-precision sections with constant and variable sections along the length of the strip. The purpose of the invention is to simplify the design of the stand by using existing adjustable brake devices to create and adjust axial, tension

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with

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ate

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in UP P HP.GH bearings, increase; 1О. OvS Ch11Osti of resistant podigignik by reducing AeflcTByionaix on them in the process of rolling axial forces, increasing the accuracy of rolling and expanding the technological capabilities of the cage. The implementation of the chevron wheel 11 of the two helical gears 12 and 13 makes it possible to ensure a constant and independent of the direction of the axial components of the rolling force, the direction of the axial forces acting on the thrust bearings. However, these forces are reduced by 5-11 times. Gears 12 and 13 can by means of mobile

The invention relates to ferrous and nonferrous metallurgy, namely, rolling stands for the production of strip, varietal and shaped, including high-precision profiles with a constant and variable cross-section along the length of the strip.

The purpose of the invention is to simplify the cage design by using existing adjustable brake

devices for creating and adjusting the magnitude of axial tension in thrust bearings, increasing the durability of thrust bearings by reducing axial forces acting on them in the rolling process, improving rolling accuracy and expanding the technological capabilities of kaya.

FIG. 1 shows a cage, a view along the rolling axis; in fig. 2 - node I in FIG. 1; FIG. 3 is a view A of FIG. one; in fig. 4 is a view B in FIG. one; FIG. 5 is a section B-B in FIG. 3; on

FIG. 6 - section G-Y in FIG. 5. I

The rolling stand contains rolls 1,

mounted on radial and thrust bearings (not shown) in the drawers 2 installed in the base 3, j device for installing an axial lift in thrust bearings (not shown) in the form of adjusting nuts acting with thrust bearings using intermediate sleeves and gaskets ( not shown), a device for continuously variable alignment of the periods A of the opposing work rolls 1, an axial adjustment device 3 of the upper work roll and a radial "

the keys, each separately or jointly, be associated with the work rolls 1. The roll brakes and the movable keys are controlled from the mesos between the cushions and the bed in the direction of the roll axes. This allows, by changing the braking torques on the rolls and directing axial forces in helical gears of gears 12, 13 and 20, to ensure, during the rolling process, a constant ratio of axial component values from rolling force and axial force of helical gears. 1 hp f-ly, 6 ill.

25

thirty

45

(n - -., 35

40

adjustment (not shown) of the upper and lower work rolls 1. The shafts of the work rolls 1 are fitted with drums 6, which interact with the pads 7 of adjustable braking devices, for example, shoe brakes 8, mounted on the cushions 2 work rolls 1. Between the slats 9 and 2 pillows Frame 1 is fitted with force-measuring elements (mes-doses) (not shown), intended for measuring axial forces on rolls 1.

"

The device for continuously variable alignment of the 4 working rolls 1 contains assembled chevron wheels 11 mounted by dowels 10 on the shanks of the working rolls 1 with the possibility of free reciprocal rotation, each of which consists of two coaxial helical gears 12, 13 with the opposite direction of the teeth. The wheels 12, 13 are secured against axial movements with the help of stop shoulders, embedded respectively on the shanks of the work rolls 1 and in the bores of the helical gear 12 and the stop shields 14. The keys 10 are 10. Flanged movable in the direction of the axes of the work rolls 1 and interconnected by the crosspiece 15, which in turn is provided with a rod 16, located in the bore of the housing 17 of the retainer 18, fastened with the thrust washer 14. The working length of the tongue 10 does not exceed the width of any of the helical teeth wheels 12,13, the Shank of the rod 16 is equipped with a groove, matched with levers

51507466

19 control systems (not shown) with the cups 10. The composite chevron wheels 12, 13 form gears with chevron gears 20 and are connected with them by a carrier 21. Chevron gears 20 are mounted on axles 22, 23 of the yoke 24 mounted on 25, which ensure its movement in the direction JQ perpendicular to the plane of the axes of the work rolls 1 of the movable frame 26. One of the carriers 21 of each chevron gear pair is equipped with adjustable stops (not shown) of their angular position 5 with respect to the yoke 24, polnennos, for example, in the form removable brackets with an adjusting screw attached to the yoke 24, and the yoke 24 with a device for moving it in a 20 frame 26 made in the form of a screw-nut transmission 27, and a spring 28 installed from the opposite transmission of a screw-nut 27 side into the slot of the yoke 24. Coaxial gears 29,30, which diameters are larger than chevron diameters, are installed coaxially with each of the chevron gears 25 and 20 on axes 22 and 23.

working rolls 1 are respectively installed on the slab and guides of the moving frame 26. Removable brackets with adjusting screws Nin (not shown) and transferring the screw nut 27 establish the alignment of the axes of the composite chevron wheels 11 and the work rolls. With the aid of the device 35, the frame 26 is moved to the rolling machine and the inner bores of the composite chevron are mated.

wheels 11 with shanks of work rolls 1. Next, by means of a device 35 and rotation of a swivel driver nut 32 mounted in a split case of the driver 33 interacting with a chevron gear 20, the composite chevron wheels 11 are pressed against the thrust collar of the shank of the work rolls 1 by rotating the work rolls 1 the combination of the longitudinal axes of the ishinki grooves of the shanks of the work rolls 1 and the composite chevron wheels of the gears 11 in the same plane. The coaxiality of the longitudinal axes of the keyways of the components of the chevron wheels, namely the helical gears 12 and 13, is ensured when assembling the deviceshairs 20. One of the chevron six to 30 stepless alignment of the pariods of the opposing rolls 1, and due to the fact that each of the components of the chevron wheel 11 is in constant engagement with their common chevron gear 20, the mutual angular position of the helical gears 12 and 13 remains unchanged for the entire period of operation of the device 4, and therefore is provided with osnost keyways longitudinal axes helical gears 12 and 13. The thrust washer 14 is then assembled with the key 10, lock levers 18 and 19, the system control dowels

The 20 (upper) and helical gear 29 gears mate with the axis 22 by means of, for example, a spline connection and are equipped with axial displacement devices made in the form of a screw

31 and swivel driver nuts 32 mounted in detachable housings of drivers 33, and another chevron gear 20 (lower) and helical gear gear 30 are fixed from axial movements, for example, using a nut 34. Moving the frame 26 in the direction of the axes of the work rolls 1 carried out device 35.

The rolling stand works as follows.

Pre-assembled and tuned, in a known manner, the frame 3 with work rolls 1, adjustable brake devices, for example, shoe brakes 8, radial devices (not shown) and axial 5 adjustment of the work rolls 1, force-measuring elements (mesos)

(not shown) axial forces at work with this moving pins 10 roar rolls 1 installed between the pads 9 of the pillows 2 and the frame 3 and the device 4 to continuously change the periods of the opposing pins 19 of the pins control system and adjustable braking devices, such as shoe brakes 8 (rolling control system

working rolls 1 are respectively placed on the slab and guides of the moving frame 26. Removable brackets with adjusting screws Nin (not shown) and transferring the screw nut 27 establish the alignment of the axes of the composite chevron wheels 11 and the work rolls. With the aid of the device 35, the frame 26 is moved to the rolling machine and the inner bores of the composite chevron are mated.

wheels 11 with shanks of work rolls 1. Next, by means of a device 35 and rotation of a swivel driver nut 32 mounted in a split case of the driver 33 interacting with a chevron gear 20, the composite chevron wheels 11 are pressed against the thrust collar of the shank of the work rolls 1 by rotating the work rolls 1 the combination of the longitudinal axes of the ishinki grooves of the shanks of the work rolls 1 and the composite chevron wheels of the gears 11 in the same plane. The coaxiality of the longitudinal axes of the keyways of the components of the chevron wheels, namely the helical gears 12 and 13, is ensured during assembly of the device 5

Q

five

0

The periods of opposing rollers 1, and due to the fact that each of the components of the chevron wheel 11 is in constant engagement with their common chevron gear 20, the mutual angular position of the helical gears 12 and 13 remains unchanged throughout the entire period of operation of the device 4, consequently, the coaxiality of the longitudinal axes of the keyways of the helical gears 12 and 13 is ensured. Then the thrust washer 14 assembled with the key 10, the latch 18 and the levers 19 of the system control the keys

10 axially locking the composite chevron wheels

11 on the shanks of the work rolls 1,

and the axial movement of the helical gear 29 (the lower work roll 1 is braked by the corresponding shoe brake 8) - the stepless combination of the periods of opposing work rolls 1.

The cage drive is turned on, and at the same time, the movable pins 10 by the levers 19 of the key management system and adjustable braking devices, such as shoe brakes 8 (rolling mill

cages), mates with each of the oblique wheels 12 and 13, as a result of which small forces on resistant subippers (not shown) of the work rolls 1 are absent when scrolling through the yutti (helical wheels 12 and 13 play the role of a chevron wheel) . In the task of the strip at the moment of its capture by the work rolls 1, the resulting axial components P from the rolling force P are recorded by load-bearing elements (not shown), the indications of which are transmitted to the control unit controlling the change in current strength (changing the pressing force of the pads 7 to the drums 6 ) in an electromagnet (adjustable brake device, such as a shoe brake 8 and axial position of the keys 10 on the rolls' tails. Depending on the magnitude and direction of the axial components of the rolling force, The rolls are loaded with the appropriate braking torque and the required axial key position is set, due to the fact that the braking moments on the work rolls 1 can vary over a wide range and constitute a substantial part of the torque on the work rolls, and the direction of the axial forces in There are any number of helical gears 12,13,20, the amount of axial force in the mentioned helical gears can also vary over a wide range. From here there is a real possibility depending on the indications measuring elements (not shown) by changing the magnitude of the braking torques on the work rolls 1 and moving the movable ps 10 in the rolling process to ensure the following constant ratio of axial pump

pressurized Pd from rolling force P and axial force A, corresponding to helical gearing A 0.88-0.5 Pn or A 1.2-1.5 PO, while it is possible to ensure a constant direction resulting from axial forces A and R., throughout the process of shaping the strip, which in turn determines the possibility of installing one stop subtype of unilateral action in the bearing supports of each work roll.

Thus, taking into account the opposite directions of effort P and A,

0

5 about 5

axial force (axial tension g) of 0.2-0.5 R and having a constant direction throughout the process of shaping the strip, including deformation of high-precision periodic profiles, the change of which is associated with a change in the direction of the axial components of the rolling force in the process of their reduction,

The scope of this technical solution is not limited to the rolling stand considered above.

It is advisable to use this technical solution for the rolling stand construction with a rack drive, the rail of which is located between the axes of the work rolls and interacts with each of the composite chevron wheels mounted on the tails of the work rolls designed for the stepwise deformation and rolling method to be short; high-frequency blanks of parts. This cage combines the simplicity of its construction 1i with high rolling accuracy and durability of thrust bearings.

The expansion of the technological capabilities of the cage is ensured by expanding the range of high-precision profiles of constant and variable length of the section by mastering the production of profiles, the change in form of which is associated with the emergence of significant and variable in direction (including and in the process of strip reduction) axial components of the rolling force, since this technical solution allows for a constant, independent of the 5 axial directions, their rolling force, the direction of the axial forces acting on thrust bearings, and the magnitude of these efforts is 5-11 times less than the values of axial tension in thrust bearings in the known solutions. The sharp decrease in axial forces acting in the process of deformation of the strip on the thrust bearings causes an increase in their long0

five

0

0

eternity, but stable, not dependent on the direction of the rolling forces, the direction of axial tension provides: firstly, the simplification of the design of the bearing supports (the number of thrust bearing pads is reduced twice); secondly, an increase in rolling accuracy (eliminating axial movements of the work rolls in the process of shearing the strip). In addition, simplification of the stand design is achieved by using as a means for creating and adjusting the axial tension of existing adjustable braking devices, the control system of which is equipped with force-measuring elements (mesdoses) of axial forces on the rolls and associated with the position control system device slots are turned on with a composite chevron wheel, and the exclusion of hydraulic cylinders and hydraulic stations makes it possible to improve working conditions and reduce the laboriousness of operating the stand.

The invention allows for the development of new types of metal products, namely, high-profile profiles with a constant and variable cross-sectional length along the strip, the shape of which is associated with the emergence of large and variable axial components from the rolling force, to reduce labor costs engineering industry, increase the utilization rate of the metal to 0.6-0.98 and, depending on the grade of the range and the assembly of the batches, ensure cost reduction and high-precision workpiece parts.

Claims (2)

Invention Formula 1, Rolling cage containing frame installed in it work rolls mounted in pillows on radial and thrust bearings, individual devices for creating and adjusting axial tension in thrust bearings, adjustable torus from 15 to 20 25 30 0 five five Brain devices mounted on work roll cushions and associated with work roll shanks, a brake control system and a device for continuously variable overlapping periods of opposing work rolls, including a cage movable in the direction of the stand with two coaxial gears of different sizes diameters, gears of larger diameter are made helical and mutually connected, and gears of smaller diameter are chevron gears, while the axles of the cages are also harnessed with chevron gears, Strictly coupled to the work rolls and meshed with the corresponding said chevron gear cages, one of the helical gears of the cage is mounted with the possibility of reciprocating movement along the axis, characterized in that, in order to simplify the stand design by using known adjustable brake devices for creating and adjusting the axial tension value in thrust bearings, increasing the durability of thrust bearings by reducing the axes acting on them during the rolling process efforts, increasing rolling accuracy and expanding the technological capabilities of the cages, chevron gears on the carriers are made into two oblique gears with a counter direction of the teeth, each of which is equipped with a key moving along the gear axis. 2. A cage according to claim 1, characterized in that the control system of adjustable braking devices and key position is provided with measuring elements (or masses) of axial forces on the rolls installed between the pliers and the bed. nineteen 14 Фа8.1 18 15 18 eleven Fig.Ch 31 V w 11 rj Vl- ./5 f7 iq Y / W