Multiple-stand reeler for lengthwise rolling of bars comprising four-roll stands, and method of stands replacement

FIELD: process engineering.

SUBSTANCE: proposed reeler comprises stands with four driven rolls, adjustment devices mounted outside of stand and telescopic shafts. Note here that said reeler comprises central frame with said stands, first platform located at loading side to support replacement stands, second platform locating at unloading side, opposite said loading side, transverse drive to push replacement stands toward those to be replaced. Note also that said stands toward those to be replaced are transferred at second platform to mount replacement stands in central frame instead of stands to be replaced.

EFFECT: higher safety, ruled out manual jobs.

15 cl, 10 dwg

 

The scope of the invention

The present invention relates to mnogoluchevogo rescatame rolling mill for longitudinal rolling of rod blanks form that contains the stand with the four drive rollers, and replacement method of the stands.

Prior art

It is known that the longitudinal rolling of billet rod shape, in particular pipes or rods, runs on mnogocelevykh rolling mills with drive rollers, with each cage containing two or three rollers, and to change the conditions of rolling and compression in each stand, the position of these rolls can be adjusted by changing the distance between the roller and the axis of rolling.

On the other hand, the equipment of the specified type can contain a large number of stands (more than 15-16 stands and up to 32 sections of considerable length (for example, from 10 to 12 m) with a small minimum distance between the axes of the rolls, thereby minimizing the head and tail sections of rod blanks forms that are wrong, because the conditions of their rolling when working rolling mill differs from the rolling average plot rolled blank.

In rolling mills with two stands to the roll axis in successive trains offset by 90°, while the gap between the rollers is dependent on the position of the bottom of streams rolls the placenta is the fact stands. In rolling mills with a three-roll stands the offset of the axes of the rolls relative to each other in successive stands is 60°. Rolling mills of known types contain complex adjustment of the rolls, which requires a large number of engines and the use of additional equipment.

In rolling mills with a three-roll stands of the specified type radial rolling forces usually operate within a stand, unlike tube mills, in which the rolling forces have an effect on the frame.

When using a four-roll mill has several advantages that are listed below:

- more uniform peripheral speed of the roll on the stream (the speed at the bottom of the stream relative to the side walls of the stream), when compared with the three-roll stands, as in the four-roll stands of the corresponding sector of each roll is 90°, and three-roll mills sector of 120°. With an equal number of stands provides a more effective presentation of the material;

- lesser effect sunsets (crumbling) billet rod shape around the edges of the swath compared with the three-roll stand as the axis of rotation of two adjacent rollers are at an angle of 90°, and not at an angle of 120°. In fact, the effect in the rolling process happens due to the fact that mA is Arial billet rod shape has a tendency to enter into the space between the rollers.

On the other hand, if the rolling mill used four-roll stands, there are a number of intractable problems. Increases the number of required auxiliary components and, consequently, increase production costs. To install a specified rolling mill on the factory floor also requires a large area.

In addition, some necessary operations are more labor-intensive, such as the replacement operation of the mill during the rolling process, which is long and requires several manual operations, as well as the setting of the rolls to prevent eccentricity of the successive rolls, which causes the formation of burrs on the workpiece rod form.

An additional problem is that in the rolling mill with four-roll stands, it is difficult to move at an angle of 45° two successive stands, and, in fact, hampered the implementation of the design of the rolling mill, as well as replacement roller/cage.

Rolling mills with four-roll stands is known in the art, contain two rolls, which are driven, and the other two swaths, which are idle, as described, for example, in patent EP-0865836, these rolling mills are used, in particular, when rolling with a reduction or without compression. Because the idle rollers do not have any is because of the pulling action, the specified type of train is not universal.

Disclosure of inventions

Based on the foregoing, the present invention is to overcome all the above drawbacks to provide novokletevoj rolling mill Raskatov type for longitudinal rolling of rod blanks form that contains the stand with the four drive rollers, and replacement method of the stands.

In accordance with paragraph 1 of the claims of the present invention is novokletevoj rolling mill Raskatov type for longitudinal rolling of rod blanks form that contains four-roll stand, with four roll these stands are driven and provided with rollers, and the specified rolling mill contains:

Central building in which these stand for the specified rolling placed sequentially;

the first platform located on the first boot-side carrier and one or more replacement cages;

the second platform located on the discharge side, opposite the specified boot side, and the specified second platform adapted to move the specified one or more stands to be replaced;

the transverse movement device that operates on the specified one or more replacement mill and a confirmation is levelsee them to the appropriate stands, be replaced in the main building; these stand to be replaced, moved to the specified second platform, and the specified one or more replacement stands are installed in place of the specified one or more stands to be replaced at the specified Central body.

Another objective of the present invention is to provide a method of replacement stands in the above-described mnogoletija rolling mill, comprising stages:

- preliminary location specified on the first platform of the specified one or more substitution stands, according to the number of stands to be replaced in the main building;

- disconnection of these spindles and maintaining them so that the end part close to the rolls, was issued by the edges of the corresponding cage;

- move in the transverse direction of the specified one or more substitution stands in the boost to the specified one or more stands, which must be replaced to the specified one or more stands to be replaced, were offset by the specified second platform, and the specified one or more replacement cages were installed in the main building;

- re-coupling of these spindles and renewal of the rolling process.

The specific objective of this is to bretania is to offer novokletevoj rolling mill Raskatov type for longitudinal rolling of rod blanks form that contains the stand with the four drive rollers, and also to offer a way to replace the stands, as described in more detail in the claims, which form an integral part of the present description.

Brief description of drawings

Additional objectives and advantages of the present invention will be apparent from the following detailed description of one of the embodiments of the invention, which is a non-limiting example, with reference to the accompanying drawings.

1, 2, 3 are views in side section of a cage according to the invention.

4 and 5 is a view in side section and top view, respectively, of a rolling mill according to the invention.

Figa, 6b, 7a, 7b - structural parts of the device adjustment roll according to the invention.

Fig - view in lateral section of the device group stands in the rolling mill according to the invention.

Figure 9 - types of side section of the support structure rolling mill according to the invention.

Figure 10 is a variant of the adjustment of the rolls.

The same reference position and the characters on the drawings refer to the same elements or parts.

Detailed description the preferred option of carrying out the invention

On Phi is .1, 2 and 3 presents the cage 1 according to one aspect of the present invention, containing four of the roll 2, 3, 4 and 5, each of which, respectively, supplied with a corresponding drive shaft 6, 7, 8, and 9.

All rolls are driven, with two adjacent rollers are powered by a single motor through suitable gearing.

Thus, the number of driven rolls in the stands twice the number of engines. In particular, the rolls 4 and 5 are the engine 10, which is connected to the gear cage having two outputs 11, 12: the output of the 12 causes the shaft 9 directly, and the output of the 11 causes the shaft 8 by means of shaft 13 and a transmission 14 at a 90°angle.

Similarly, the rolls 2 and 3 is driven through a motor 15, which is connected to the gear cage having two outputs 16, 17: the output of the 16 causes the shaft 7 directly, and the output of the 17 causes the shaft 6 by means of shaft 18 and the transmission 19 at an angle of 90°.

In the rolling mill stands arranged in series, with the cage adjacent the cage shown in the drawing, has similar components, but rotated about a vertical axis, thus, stands are located symmetrically with respect to the specified axis.

Thus, one crate mechanically identical to the next cage, because the next crate is set by turning precisely 180° about a vertical axis passing through the axis of rolling.

In addition, the axis of each roll stand is rotated by the angle α1=-22,5° relative to the vertical or horizontal axis, while the axis of each subsequent roll stand is rotated to the opposite angle α2=22,5°.

Means of drive rolls, i.e. gearboxes and engines, there are four rows relative to the horizontal plane at an angle of +/-22,5°. Thus, the axes of the rolls and means to drive the rolls in successive stands shifted by 45°. The cage in which the axis of each roll is rotated at an angle α1 may be located in the rolling mill in an odd position, and the cage in which the axis of each roll is rotated at an angle α2 may be located in the rolling mill in an even position, and Vice versa.

The vertical and horizontal planes are planes, which are stand in the rolling mill.

Four roll in each stand lie in one plane.

In addition, the bottom of the four streams rolls the cage occupies the position depending on the clearances between the rollers in the subsequent stand.

With this arrangement, the space along the axis of the rolling mill for engines and gearboxes doubles as engines and gearboxes odd and even stands shifted and, thus, are not aligned.

In the rolling mills of this type, in contrast to tube mills, in which the rolling forces have the step on the mandrel, radial rolling forces usually operate within a stand, which allows to simplify the construction of the exterior design, as for the cage should be provided for locking and centering system, but there is no need to control systems adapted to maintain a radial rolling forces.

Because of those technical solutions it is possible to use four-roll stand compact design with small size in height and width. Improved axial flow is achieved through the presence of a larger number of rolls, each of which has a circular sector of 90°, compared with the three-roll stands of a known type in which a circular sector of rolls of 120°.

The location of the shafts coming out of the gear at an angle of +/-22,5° relative to the horizontal direction, provides additional benefit in improved drainage of the cooling system.

Uniform peripheral speed of the roll on the stream velocity at the bottom of the stream relative to the side walls of the stream), certainly better than in the rolling mill with a three-roll stands, as in the four-roll stands of the corresponding sector of each roll is 90°, and three-roll mills sector of 120°. Submission of material to the rolls is improved, resulting in asaeda efficiency of the rolling mill.

Less effect sunsets (crumbling) billet rod shape around the edges of the swath compared with a three-roll mill, is provided as the axis of rotation of two adjacent rollers are at an angle of 90°, and not at an angle of 120°. In fact, the effect in the rolling process happens due to the fact that the material of the rod shape has a tendency to lengthen the space between the rollers.

In addition, when the rolling of thick pipes form the inner surface of the pipe is improved by reducing the effect known as polygonality the inner surface of the pipe.

The shafts are split shafts telescopic type. The outer ends of the shafts are connected with the longitudinal arms (in the direction of the axis of the rolling mill), for each of a number of shafts placed at equal angles in different cages, provided one traverse. There are four beams 31, 32, 33, 34 for the shafts of rolls placed in the stands at an angle α1, and the same number of traverse 35, 36, 37, 38 for the shafts of rolls placed in the stands at an angle α2.

The ends of the shafts are connected to the rollers through a gear connection of known type, which allows you to disconnect the coupling, mounted on the end of the roll.

Longitudinal beam simultaneously affect the shafts of the corresponding number of through hydroregulation 23 and maintain the Pingala thus, to the end part directed to the rolls, was issued by the edges of the crate.

Hydroregulation 23 act on the beam 31, 32, 33, 34, 35, 36, 37, 38 and then on the inside of the traction rod, coaxial to the spindle.

As shown in figure 3, the cage containing the rolls are essentially square in shape with the bottom horizontal side 21.

In addition, the lower side of the cage has external projections 22, 22b, which provide extension stands required for replacement operations of the crate. The shape of the lower side of the cage is symmetrical about a vertical axis, allowing the same cage can take odd or even position in the rolling mill, which is enough to rotate the stand 180° around the vertical axis, while the position of the bottom side 21 is maintained. Thus, Autonomous operations training crates are greatly simplified, since it is enough to lift the crate and rotate it so you can use crates of the same type in consecutive positions.

In known rolling mills with a three-roll mill is the slope of the cages relative to the horizontal axis that, in practice, no doubt, quite uncomfortable from the operational point of view.

The design of the stand described above is particularly simple, and the process of replacing the stand is quick. It should be noted that in rolling the mills of the specified type is usually made by partial replacement of the stands, i.e. there is typically a need to replace only some of the stands on the output side when changing the output size machined billet rod form.

In the end, it should be noted that in these rolling mills, as is known, no cage can be lower during the last stand of the rolling mill, and idle stand provided support systems for pipes and supply systems, these idle stand such work stands and must be located and secured in the rolling mill, like working mill rolling mill.

As shown in figure 4 and 5, the rolling mill L contains the Central building, which sequentially alternate stand of the above type, i.e. rotated at an angle of 180° relative to the vertical axis.

The replacement system stands includes a rectilinear three-position lateral movement, and a Central position 40 corresponds to the axis of the rolling mill. The arrow along the axis 40 indicates the direction of rolling.

New cage, which should replace the working stands, located on the platform 41, located on the first side of the rolling mill, also called a boot party, and their position is aligned according to which they will occupy when installed in the rolling mill.

Stand to be replaced, will be posted on the another platform 42, located on the second side of the rolling mill, also called discharge side, which is opposite to the first side of the rolling mill.

Stands not be replaced, remain in place.

First, the shafts are disconnected and are supported in the state outside of the stands.

It should be noted that the shafts can also be disconnected individually. This increases the number of cylinders hydraulic motors, because each shaft, use a single cylinder, which eliminates the need for longitudinal traverse.

Then, the platform 41 is moved in the longitudinal direction, i.e. parallel to the roll axis (in the direction of the arrow along the axis 41, as shown in the drawing)from the boot side so that new stands were set respectively to the mill to be replaced, the moving platform is performed using the appropriate conventional means of travel, which is not shown in the drawing, acting in the direction of the arrow.

The usual device 43, 44 lateral movement for all stands (which is also shown in figure 1) moves the new cage in the direction of the axis of the rolling mill along the guide rails 45, on which they rely bottom side. Specified normal lateral movement may be a hydraulic actuator 43 that moves the longitudinal yoke 44, the cat heaven is in contact with the edges of the protrusions 22 new trains.

These new crates push the appropriate used stand of the rolling mill on the platform 42, located on the discharge side, and the tabs 22, 22b on the lower side of the train moves used stands and placing them on the platform 42, located on the discharge side.

Additionally, there are devices 50 that functions as a mechanical stop for correct positioning and locking cages; when lifting they engage the edge of the crate.

In one of the embodiments of the invention, these devices are rotated around the pin 51 by respective hydraulic actuators 52 (enlarged image in figure 2) to carry out the replacement operation of the cage.

These devices 50 are two on each stand and are alternately above and below the same side of two successive stands. They can have a different design, different from the rotary design, provided that they do not impede the replacement of the stands.

To create space between the old mill, extracted from the discharge side, and new stands installed in operating position in the rolling mill, the old recoverable stand, preferably primarily relegated from the new stands lever device 57 (larger image figure 1).

On conclusion of the AI replacements stands respective shafts reconnect with rollers, and the rolling process can be resumed. Without interrupting the rolling process used crates removed from the platform 42, and a replacement crates are loaded onto the platform 41 near rolling mill.

The platform 42, located on the discharge side, with corresponding known means of longitudinal displacement, which is not shown in the drawing, acting in the direction of the arrow.

It is obvious that, without departing from the inventive concept may be performed structural modifications of any of the platforms or both platforms 41, 42, allowing the moving platforms in the transverse direction, and not longitudinal, but in any case, the move is made to summarize the new trains to the Central body and removal from the Central building used cages.

Additionally it should be noted that in the rolling mills according to the prior art replacement stands are made from one side only, and therefore the retrieval steps used in the stands and installation of new stands may not be synchronized, in contrast to the rolling mill according to the present invention.

The advantages of this method of replacement of stands according to the invention are obvious. The General design is small and uses few elements, while the process of replacing the CL the TEI is very fast.

It should be noted that the process is completely automatic and eliminates the need for manual operations even to lock the cage. For example, the crane can easily lift the crate and rotate them around the vertical axis, so they took the odd and even position in the rolling mill.

This symmetry is also important in the processing of the rolls.

As mentioned above, is the need of the processing rolls to avoid eccentricity of the adjacent rolls in the nearby points, due to the fact that the gap between the two rolls is very small (for example, 2 mm) and even a slight eccentricity (for example, 0.2 mm), restricts transitions, leading to the phenomenon of privacyware or the formation of burrs on the workpiece rod form.

So to solve this problem, you must ensure the continuity of the profile between adjacent rollers, which can only be achieved by the processing rollers mounted in the cage.

Thus, the rollers may be treated with a special dedicated equipment designed to handle rolls installed in the cage, because the rolls should not be removed from the cage, and odd and even stands equivalent to each other, just when rotated 180° around the vertical axis can be summed up by turning the equipment.

<> Figure 2 (larger image), 6A, 6b, 7a, 7b, it is shown that the swath (e.g., roll 3 in figure 2) can be provided with an eccentric micrometric regulation system radial position relative to the axis of rolling.

Roller 3 is equipped with bearings mounted in eccentric bushings 71, 72 with two sides, one sleeve (72) is mounted on the side of regulation, and the other sleeve (71) installed on the opposite side. Sleeve between a rigidly connected by a crosspiece 73.

In one of the embodiments of the invention the eccentricity ECC=5 mm, the working angle is +/-15°, which corresponds to the maximum change of the radial position of the bottom of a stream, of about +/-1,25 mm, and corresponds to the maximum change of the distance between two opposite rollers of about 5 mm.

On the side of the regulating roller has a spring connection 74 in the form of a sleeve and a Cam device 27, to rotate, for example, is supplied by a motor 75 worm or other non-reversible engine or electric motor with brake.

Eccentrics of two adjacent shafts are connected through bevel gear sectors with an angle of 90°, which allows to transmit the rotation of the eccentric sleeve adjacent the roller from the Cam (72), driven from the outside. All roll cages etc is usmotreny jumper 73.

For example, the roll 3 (fig.6b), a bevel gear sector denoted by the reference position 76 located on the side of regulation, and for connecting the roll 4 is provided equivalent conical toothed sector mounted on the eccentric sleeve 71 on the opposite side.

The regulating device 27 has an effect on the spring sleeve 74 by means of two feed pins, which engage two recesses a, 74b, available spring sleeve.

Figure 10 shows a variant of the control device of the rolls. To adjust the eccentric, preferably, in each crate added four pairs of bevel gear sector(110, 111, 112, 113), which mechanically connect all the eccentric sleeve.

In the nominal position (for example, at an operating angle is 0° and the zero value of the radial displacement, however, there may be other provisions of the angular eccentricity) locking device 81 gears flange, combined with the body of the cage, when the control unit is moved from the stand. For example, the blocking device is a protrusion 81, which is included in the groove 80, made on the flange, combined with the body of the crate.

Thus, before you replace the cage, eccentrics disposed at a specified nominal position (nulev the magnitude of the radial displacement), and the device regulating spring sleeve, pulls away. In this position automatically engages the locking device, and the radial movement is blocked at nominal value.

Thus, when removing the stand has the following two advantages: the cage is fixed and the position of the rolls at rated conditions is known. This allows machining of rolls on a special lathe at a nominal position of the crate. Accordingly, all four of the roll can be machined in the same position, which is already working position, thus, ensures equal treatment of all rolls with the receipt of the same diameter.

The described technical solution provides operational safety, since the eccentric rollers in the cage mechanically locked when the crate is not in the rolling mill. Return stands in its working position is quick and does not require manual operations.

Fixed stand without eccentric regulation and adjustable stand through eccentric regulation can coexist in the rolling mill. When removing exotics and spring sleeves of design adjustable stands can be obtained easily fixed stand.

For example the EP, roughing stand (on the input side of the workpiece rod shape in rolling mill) are fixed, while finishing stand (usually the last three stands each row) can be adjustable.

Above it was described how the cage in the transverse direction are included in the mill and come out with the opposite sides and thus the mechanical brakes may not apply. With this purpose uses a rotary eccentric regulating device having a mechanical anchor zones, which are based on the stand.

To provide proper alignment and locking of the stands, there are additional devices described with reference to Fig 3, 4, 5 and 8.

In stands that are aligned in the rolling mill, two hydraulic cylinders 91, 92, placed on the discharge side, move two floating finger 93, 94, present in each stand in an upright position on a horizontal plane passing through the axis of rolling. These covered the fingers engage the corresponding covering seats in the subsequent stand. At the same time these fingers pushing his fingers further crates to reach the opposite side of the rolling mill (load side), where two seats 95, 96 are provided to accommodate the fingers and which also provides two additional cylinder. the more cylinders provided for the application of force in the opposite direction, to release the fingers from SitePlayer seats during replacement of the crate.

The leveling cylinders that push the fingers in siteplease seats formed so that before reaching the end of travel of the cage, the plate 97 has an impact on the fixed portion of the first stand, in the axial direction is grouped a whole train of cages.

Two additional cylinder 98, 99 symmetrically relative to the vertical axis passing through the axis of rolling, and contribute to group all the stands in the axial direction.

Mechanical stopper 100 provides a grouping of stands that are putting pressure cylinders located on the feeding side.

The specified technical solution allows vertical and horizontal alignment of two successive stands, avoiding working with unaligned stands. Figure 9 shows the supporting structure of the rolling mill, designed to support all device management and regulation of the rolls of the stands.

In addition, the design provides maintenance of effort developed by the cylinders 91, 92, 98, 99 to group cages.

Preferably, the described design is the design of a closed type and has two strut one strut is located on the feeding side 61, and the other riser location is at the discharge end 62.

The upper crosspiece 63 supports the upper control device. The lower annular retainer 64 allows you to relieve the force exerted on the ground.

Figure 9 device 91, 92, 95, 96, 98, 99, 100 not shown, as this drawing illustrates the concept design of the ring.

Other structural variants described a non-limiting example of implementation of the invention without leaving the scope of the present invention and includes all equivalents as understood by the experts in this field of technology.

On the basis of the above description specialists in the art will be able to carry out the invention without the use of additional structural details.

1. Novokletevoj rolling mill Raskatov type for longitudinal rolling of the billet rod shape having four-roll stand (1) with the drive rollers with shafts containing the Central building, which consistently has the stand, the first platform (41)located on the boot side for the installation of one or more replacement stands, the second platform (42)located on the discharge side opposite to the specified boot-side relative to the Central body, and designed to move the specified one or more stands, the underlying replacement, device (43, 44) lateral movement to ensure that the movement of one or more replacement stands to the respective stands, subject to replacement in the Central building to move them to the specified second platform (42), so that one or more replacement stands are installed in place of the specified one or more stands to be replaced at the specified Central body.

2. Novokletevoj rolling mill according to claim 1, in which the cage is installed in a position rotated 180° about a vertical axis relative to the preceding or subsequent stand, and in which the springs bottom rolls in the cage occupies the position depending on the clearances between the rollers in the previous stand or subsequent stand.

3. Novokletevoj rolling mill according to claim 1 or 2, which contains the drives rolls outside the cage, and a telescopic shaft, the axis of each roll (2, 3, 4, 5) cage is rotated at an angle α1=-22,5° relative to the vertical or horizontal axis, while the axis of each subsequent roll stand tapped at the opposite angle α2=22,5°, these drives rolls and these telescopic shaft (6, 7, 8, 9) are arranged in four rows at the specified angles α1 and α2 relative to the horizontal plane of the subsequent stand, four roll each stand lie in one plane.

<> 4. Novokletevoj rolling mill according to claim 1, in which the drives of the rolls of each stand contains two motors (10, 15), one engine for two adjacent rolls, driving two adjacent swath through transmission(11, 12, 13, 16, 17, 18), associated with these telescopic shafts(6, 7, 8, 9).

5. Novokletevoj rolling mill according to claim 1, which contains the longitudinal beam (31...38), one transect for each series of shafts, located at the same angle in the rolling mill, while the outer ends of these shafts are connected with these arms, hydraulic actuator (23)is installed on the specified longitudinal traverse, providing support shafts so that the middle to the end of the rolls were issued by the edges of the crate.

6. Novokletevoj rolling mill according to claim 1, which contains the hydraulic actuators (23), mounted directly on the shafts, providing support for them so that the middle to the end of the rolls were issued by the edges of the crate.

7. Novokletevoj rolling mill according to claim 1, in which one or more of these rolls contain eccentric micrometric regulation system of the radial position of the roll, with the specified Cam system includes means (80, 81)to provide restraint at a predetermined position of the eccentric in the process of replacing the stands.

8. Novokletevoj rolling mill according to claim 1, to the which contains a device (50) for each stand, located on the discharge side, intended for fixing the cage and installed with the ability to lead when replacing the cage.

9. Novokletevoj rolling mill according to claim 1, which contains a lever device (57) for each stand that is designed to remove the cage to be replaced from the Central block.

10. Novokletevoj rolling mill according to claim 1, which contains a device for aligning and fixing stands, having one or more floating fingers (93, 94)included in the corresponding internal seats of each of these stands for alignment, one or more hydraulic cylinders (91, 92)mounted on the first side of the rolling mill, intended for transportation of these floating fingers in each of these stands for engagement with the adjacent cage, providing the specified alignment and locking the cage, one or more hydraulic cylinders that are installed on the opposite side of the rolling mill, intended for transportation of these floating fingers in the opposite direction, turning their back to the specified internal seats, providing unlock the cage.

11. Novokletevoj rolling mill of claim 10, which contains one or more additional cylinders (98, 99), installed on the specified first side of the rolling mill, spermidine stands in the Central building, providing axial grouping of stands, a mechanical stopper (100)is installed on the specified opposite side of the rolling mill for the specified axial grouping of crates.

12. Novokletevoj rolling mill according to claim 1, which contains a support structure of a closed ring-type.

13. The replacement method stands in mnogoletija rolling mill according to any one of claims 1 to 12, comprising the stages - preliminary location specified on the first platform of one or more replacement stands according to the number of stands to be replaced in the main building, removing these shafts (6, 7, 8, 9) and hold them so near to the rolls (2, 3, 4, 5) the end of the issue by the edges of the respective cages, moving in the transverse direction of one or more replacement stands in the pressure to one or more stands to be replaced, to offset them found on the second platform, and the installation of one or more replacement stands in the Central building, connecting these shafts for renewal of the rolling process.

14. The replacement method stands on item 13, which includes the step of announcing to the specified Central body specified replacement stands on this first platform.

15. The replacement method stands on item 13, which includes the step of removal from the specified Central body ukazaniya, be replaced at the specified second platform.



 

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8 cl, 6 dwg

FIELD: metallurgy.

SUBSTANCE: invention can be used for complete change of overhanging rolls of bar-straightening machine with vertical disposition of its axis. Device contains trolley, mounted with ability of displacement from cdrive in the direction; perpendicular to longitudinal axis of machine. On trolley there are located positioning elements in amount, corresponding number of changed rollers with ability of simultaneous installation of it co-axial to machine rollers, elevating platform, machinery for twisting and curling of screw fixing of rollers, claws, mounted with ability of interaction with circular groove of rollers, and also scaffolding for storing of changeable complete of rollers. Positioning facilities are implemented in the form of claws, rigidly mounted on elevating platform with ability of putting in to circular groove of roller at horizontal trolley path with low position of platform, and mechanisms for twisting and curling of screw fixing of rollers are mounted directly on elevating platform in cavity, formed by claws.

EFFECT: simplicity of construction, ability of rollers change with bevel connection, exact positioning, increasing of maintainability of the device.

4 cl, 8 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to metal plastic working, namely to method and device for replacement of sets of support and working rollers in working stands of rolling mill. According to invention, certain amount of separate trolleys is provided, which move across relative to rollers axis. Separate spent sets of working rollers are transported along single connecting railway with the single locomotive into turning shop, and instead new set of working rollers is delivered from there into transfer position. Opening is arranged in front of working stand, through which dismantled set of support rollers is transported by crane into turning shop and back.

EFFECT: provides for minimisation of used equipment and coordination of rollers replacement with works schedule in turning shop.

13 cl, 11 dwg

FIELD: effective process for changing rolls.

SUBSTANCE: rolling mill 1 includes several rolling stands; support plates mounted at maintaining side of stands with possibility of motion across roll axes and designed for arranging sets of rolling rolls and adjoin to floor zone of rolling shop; pits arranged in front of stands at maintaining side and having in their bottoms equipment for removing sets of backup rolls. Shortened time period necessary for changing rolls is provided due to arranging support plates in line of support plates just near rolling stands, they close said pits and are detachably joined one to other. In order to change sets of rolling rolls, line of support plates where in subgroups support plates are mutually joined one to other or where support plates are joined one to other in the whole line is mounted with possibility of shifting across roll axes along line of pits of stand zone for opening at least one or all pits. Shifting zone of plates is made in the form of roller table; floor line may be embedded relative to plate shifting line.

EFFECT: enhanced efficiency of rolls changing process.

7 cl, 13 dwg

FIELD: rolled stock production, possibly changing of rolling and backup rolls of rolling mill.

SUBSTANCE: rolling mill includes support plates movable normally relative to axes of rolls at working side of stands. Said plates are designed for receiving blocks of rolling rolls and they are abutted to floor of shop for feeding and discharging rolling rolls. In front of each stand at its working side there is port whose base is designed for unloading blocks of rolling rolls. Apparatus for transporting support plates moves each support plate between its position for changing rolling rolls when support plates are arranged just near rolling stands over ports and position for changing backup rolls when support plates are descended under floor of shop near port region.

EFFECT: shortened time periods for changing rolling rolls and backup rolls, less long route for transporting rolling rolls.

7 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to replacement of rolling mill stand (C) rolls. Said mill comprises, at least, one roll for continuous steel strip. Note here that said rolling mill stand (C) is a part of the set (N) of rolling mill stands arranged along rolling mill in direction (D) of continuous motion. In compliance with proposed method, at least one mill (CA) of aforesaid set (NA) is assigned the rolling WAIT function at free position of rolls convergence. Other stands inactive position of rolling receive initial preset roll data that control adjustment related with convergence of rolls. In the case of roll replacement in free stand (C) convergence position, initial preset data on roll of said stand and initial preset data on stand rolls still in active rolling position are individually redistributed for every said stand including isolated stand (CA).

EFFECT: better control, optimum specific consumption of metal.

7 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: proposed device comprises moving plate and rack drive arranged between bed thrust surface and rolls assembly and rolls lifting mechanism. Rack drive rack is mounted on said plate joint with rack drive gear wheel on the mill drive side, while said rolls lifting mechanism is made up of two identical lifting support rolls fitted on eccentric shafts arranged on sides of drive and rolls assembly replacement. Working surfaces of lifting support rolls are arranged on plate bottom side while support roll is arranged above the plate on mill drive side. Clearance is created between support roll working surface and top surface of the plate in its lower position, its size being equal to rolls assembly lift magnitude. Note here that eccentric shaft of rolls lifting mechanism may be driven by worm gears fitted on one shaft.

EFFECT: ease of rolls assembly operation.

2 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy. Proposed mill comprises foundation plate to support three-roll stands with rolls with their axes arranged around the circumference at 120° to each other, upper drive secured on the frame at the angle to vertical line and two rolls lateral drives. The C-shape frame supporting upper drive is rigidly attached to foundation plate. Said frame and said foundation plate are furnished with vertical and horizontal guides in contact with rolling stands. Upper drive is inclined at 0-20° to vertical line.

EFFECT: higher stiffness of mill structure, reduced crosswise sizes.

4 dwg

FIELD: metallurgy.

SUBSTANCE: invention considers devices for working rolls levelling in rolling line, particularly, in four-roll rolling mills by means of, at least, one pair of bushes acting upon roll pads between parallel and distanced racks of rolling mill framework. The device bushes are located so that they can move in horizontal slide plane with regard to the framework racks due to toggle lever adjustment. For this purpose, the pair bushes are interconnected with solid interval. In order to shift both bushes, a special assembly built up from two toggle levers is provided. One lever thereof rests upon the bush through a single joint, while the other rests upon the opposite rack of the shoe through the other joint. Both levers are interconnected by means of the toggle lever joint being moved in longitudinal direction.

EFFECT: reduced time for stand positioning in working position, precise adjustment of rolls, reduced dimensions and simplified structure.

10 cl, 3 dwg

FIELD: metallurgy.

SUBSTANCE: method is implemented in the following way. Cartridges with working roll from run position "a" is transferred from rolling axis into extreme conducted position "b" for distance ΔL. By means of well-known facilities cartridges with working rolls are taken out in horizontal plane out of bed overall dimensions on-the-mitre α=0-45° to rolling axis, that provides to avoid adjoining to equipment rolling mill. Installation of new cartridges with working rolls is implemented in inverted sequence. Operations of transposition are implemented simultaneously for two cartridges with working rollers.

EFFECT: reduction of delay for transposition and increasing of annual capacity of aggregate in whole.

3 dwg

FIELD: process flows.

SUBSTANCE: device contains a mobile case located on the roller trunnion and designed with possibility for axial travel and provided with flat surface areas that are supported by thrust elements, which are rigidly connected to the pillow in order to prevent turning of pillows around rollers during traveling; the mobile case can be manufactured as a ring flange bushing.

EFFECT: prevention of pillow turning around roller.

3 cl, 5 dwg

FIELD: rolled stock production, namely apparatuses for mounting -dismounting bearing unit of backup roll of rolling stand.

SUBSTANCE: apparatus includes chock in which bearing assembly for roll journal is arranged. Apparatus that may be temporarily joined with bearing unit and may be axially moved in direction of backup roll and from it includes lever type inner and outer cams. Inner cams are introduced to end part of backup roll journal; outer cams are introduced to bearing unit. Inner and outer cams are mounted with possibility of rotation and locking by means of bayonet type lock in end part of journal and in bearing unit. End part of journal and intermediate ring screwed-on to bearing unit at its outer side are in the form of clover leaf having through grooves for inner and outer cams. Said cams after their rotation to clamp position may engage with respective locking protrusions of journal end part and of intermediate ring. In front of outer cams, pressure ring arranged before bearing assembly of journal is mounted.

EFFECT: lowered costs of changing bearing assemblies, increased useful life period and enlarged using range of apparatus.

5 cl, 3 dwg

FIELD: making of embossing on the commercial packing materials.

SUBSTANCE: the offered technology is dealt with making embossment on the flat materials and is used for packing of tobacco products. Rollers of the devices for making embossment, which are used for machining of the flat materials, including the firs driven roller and the conjugate roller are located in parallel to each other in a holder and may be placed so, that to enter into a definite mutual contact. At least one of the rollers for making embossment is located in a replaceable unit. At that the replaceable unit is supplied with retention tools. The holder contains pockets, the form of which is in essence complimentary for the retention tools so, that the replaceable unit may be entered in a predominantly defined position into the holder by insertion of the retention tools into corresponding pockets. The given technology provides more mild replacement of the rollers.

EFFECT: the invention ensures more mild replacement of the rollers.

20 cl, 16 dwg

-reducing mill // 2227072
The invention relates to the field of manufacture, and more specifically to the structure of the pressure reducing stretch-reducing mills

The invention relates to rolling production, in particular to a device to replace the nuts that hold the rolling ring on the axis

FIELD: making of embossing on the commercial packing materials.

SUBSTANCE: the offered technology is dealt with making embossment on the flat materials and is used for packing of tobacco products. Rollers of the devices for making embossment, which are used for machining of the flat materials, including the firs driven roller and the conjugate roller are located in parallel to each other in a holder and may be placed so, that to enter into a definite mutual contact. At least one of the rollers for making embossment is located in a replaceable unit. At that the replaceable unit is supplied with retention tools. The holder contains pockets, the form of which is in essence complimentary for the retention tools so, that the replaceable unit may be entered in a predominantly defined position into the holder by insertion of the retention tools into corresponding pockets. The given technology provides more mild replacement of the rollers.

EFFECT: the invention ensures more mild replacement of the rollers.

20 cl, 16 dwg

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