Device for working rolls levelling in rolling line

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

 

The invention concerns a device for aligning the work rolls in the rolling line, in particular in the four-roll mill, at least through one pair of wedges acting on pillows rolls in the area between the parallel spaced from each other by stanine rolling stands, while the wedges are located on the horizontal plane of the slide can be moved relative to the frames rolling stands through the installation of cranked levers.

For adjustable alignment of the upper edge, for example, the lower work roll in a rolling mill stand for rolling line known various constructions of auxiliary controls, such as wedge-shaped controller, worm drive mechanism, manual wedge, plate gasket plate, hydraulic cylinders, adjusting spindle and constructive varieties using the cranked levers.

These devices require including, to the bed of the rolls contained the expensive drilled threaded socket in the fixed cross member or a very long wedges, or the presence of electrical control state of the hydraulic valve. In certain cases, also requires clamping devices, or serving team must often replace the backup rolls or, respectively, the reservoir is Natie strip, as a result of these device roads service.

Driven by the auxiliary cylinders regulators can move quickly, however, because of the necessary locking they can be used only for small angles. On the contrary, moved with tapered spindles regulators is relatively slow.

At the present state of technology from a number of documents known device for aligning the upper edge of the lower work roll on the rolling line.

The document EP 0513946 B1 describes a device for aligning the upper edge of the lower work roll rolling stands, in particular four-roll stand for rolling line by a pair of wedges placed under each bottom cushion roll, consisting of the lower wedge element movable horizontally in the direction of the axis of the roll, and the upper movable only in the vertical direction of the wedge element, which during the rolling process lie on top of each other with their inclined surfaces. Each upper wedge element along with a corresponding pillow roll can be lifted and lowered by a lifting device. The inclined surface of both wedges are made like stairs and steps, sacasas, fixed elements of the wedges relative to the vertical.

In document is e ER 0231445 B1 presents a way to move the rolls in the rolling mill in height to align the top edge of the lower work roll on the rolling line and replacement of the rolls, in particular, in the four-roll mill, equipped with a carrier for a roll change, which can move in the longitudinal direction of the rolls and are interchangeable stepped platforms of variable thickness and, accordingly, the height of the stepped mounting pillows back-up rolls, as well as vertical lifting elements for the temporary strengthening of pillows. The displacement height is so that when there is a platform with multiple steps with different heights, starting from the lowest rung, the cushion is lifted, respectively, continuous short stroke vertically by means of a lifting element up until the lower rung will not reach the level of the next higher step, and then the vertical lifting elements temporarily assume the support of pillows until the lifting element with a short stroke vertically moves back to its lower position, and the next higher step platform moves under the pillow.

In document DE-OS 2513666 described rolling mill produced using the spindle by movement of the wedge for installation and/or adjustment of the height of the input lumen hydraulic cylinder to lift the weight of the lower set of rolls by actuation of the adjustment wedge. In each frame rolls rolling glue and is provided by two hydraulic cylinders.

Document DE 2806525 C2 describes a device for removing the rolls of the rolling mill train, in particular of the four-roll rolling stands, and to align the top edge of the lower work rolls in the rolling line by sliding runners. To the drawer runners are several fitting parts of different thickness, which are entered through the sliding actuator under the pillow. For podpiranja pillows provided hoists. Fitting details are located on the sliding frame, located on a movable canvas drawer runners and associated with sliding actuator, and lifting devices are located on both sides of the sliding frame to the drawer runners.

The document US 4237715 represents the mechanism for the vertical control of the lower back-up roll in a four-roll rolling stands on the installation line. Means are provided to lift the pillow, so that when lifting, respectively, can gradually vdvinut'sâ cushioning elements between pillows and stanine rolling stands.

The document JP 7265919 describes a device for controlling alignment by digemid stepped wedges between the chocks of the lower back-up roll and stanine rolling stands. Inserted to change the spacing wedges have stepped supporting surface is mi and smooth counterface. To avoid unwanted skid, wedges inserted a smooth surface up and steps down.

Document DE-OS 2241833 discloses a device exhibiting rolls to take stock in the working position of the rolls of different width in the same cage. To do this, regulators are provided with support surfaces for chocks, bearings located at different magnitude intervals.

While regulators may have on their facing the chocks of the rolls side going towards the middle line of the rolls and parallel to it same plane and on opposite sides of wedge-shaped oblique plane that lie on the oblique planes of the wedges, moving in the direction of the middle line of the rolls. Movable wedges are on the opposite wedge-shaped oblique to the planes of the sides of the flat surfaces which are parallel to the middle line of the rolls and glides on located on the skid rolls smooth surfaces.

Document DE-OS 3737807 A1 represents a decision that relates to rolling mill, in particular'm cold rolling, at least two, in particular four to ten, mainly located essentially on top of each other rollers, and directly on the outer casing of the roll barrels impacts of hydraulic medium through the at least one useful is brasno - at least two hydrostatic support element and through the hydraulic cylinders acting on the hydrostatic supporting elements. Allow moving parallel to the axes of the rolls of wedges movable relative to each other of the inclined surfaces below the minimum of two hydrostatically acting on the barrel roll supporting elements of the lower roll, including to compensate for wear of the lower set of rolls and, consequently, of the lower roll. Movement of the wedge is influenced by the hydraulic working cylinder is parallel to the axes of the roll axis and, accordingly, its Executive element. The supply of hydraulic fluid to regulate the elastic line of the lower deflection roll can be carried out using the sensor signals. This happens indirectly, mainly through control by computer, and electronic computer compares entered into the setup for this processed material with the true values obtained from the sensor signals, which are located in the measuring instrument, surface quality, and, in addition, with the combined regulation of the lifting cylinders acting directly on the bearings of the rolls and, consequently, indigenous cervical support roll.

Document DE-OS 3737100 A1 revelation is anything running in the rolling mills. Rolling mills and calenders are driven by hydraulic cylinders to create a rolling efforts. All rolling stands with four-roll stands of rolling mills for sheet metal can weigh up to 8000 so the use of mechanical changes of the gap between the rollers at the high rolling force by means of a bent lever and nematocera spindle and the adjusting elements of the roll. This should significantly reduce the required power control, which makes the regulation more sensitive and should make possible the regulation in the micron range.

Proceeding from the above-mentioned state of the art in the basis of the invention lies in the task of developing a mechanically simple and fast operating at high rolling forces device for the variable adjustment of the alignment in the rolling mill.

For solving the problem, according to the invention, the device for adjusting the alignment with signs of restrictive part of paragraph 1 of the claims, it is proposed that the wedges of the pair of wedges associated with a constant interval with each other, for their shift provided by the Assembly of two crank levers, one of which the lever rests, at least one hinge on the wedge, and the other arm rests, at least one hinge on the opposite rack with anini, and both levers are connected by longitudinally moveable hinge cranked lever.

The basis of the invention lies in the idea of rapid movement of the adjusting wedges crank lever in position of the rolls and, therefore, quickly pulling the wedges when changing rolls.

Further improvement relevant to the invention the device for adjusting alignment is proposed that the cranked hinge arm was connected with the piston rod of the power means, which is mounted on the hinge, and the nomination and, accordingly, the return stroke of the piston rod is installed either straightened or curved position of the crank arm.

The preferred configuration provides that the hinge cranked lever was located on one of the levers with the possibility of longitudinal displacement by means of the lead screw.

It is advantageous if the hinge crank lever is mounted on mounted on the wedge lever with a possibility of longitudinal displacement by means of the lead screw attached to the engine.

Continuation of the idea of the invention lies in the fact that the cranked hinge arm cover located across the axis (x-x) of the lever spacer, on which their ends pivotally fastened, respectively, the lever and the piston rod of the power tools.

One variationname invention provides, each wedge has on its upper side an oblique sliding surface.

Another embodiment provides that the drive motor through a worm gear connected with the spacer.

Further, the invention provides that the piston rod in the cylinder of the power tools had a hydraulic device for its extension.

Finally, the invention further provides that the power cylinder means was located with the possibility of rotation around the horizontal axis.

The drawings schematically shows an example embodiment of the invention.

The drawings show:

Fig. 1 - device for aligning the upper edges of the rolls relative to the fitting line of the rolling stands, in side view and in a bent position.

Fig. 2 - device according to Fig. 1, in side view, but in a straightened position.

Fig. 3 - device according to Fig. 1 or Fig. 2, in the top view.

Three drawing consistently show, respectively, a single device for aligning the upper edge of the lower work roll in a rolling line, in particular of the four-roll rolling stands through the pair 1, 1' wedges located under the lower roll chocks, and the wedges of the pair 1, 1' wedges are connected at regular intervals with each other between the parallel spaced struts 2, 2' camp who were rolling stands, moreover, the wedges through the auxiliary regulator 13, 14 with the crank levers made with the possibility of displacement in the horizontal plane 3 slides relative to the uprights of the frame, and an auxiliary adjustment provided by the Assembly of two cranked levers 4, 5, one of which, the lever 4, and is guided through a horizontal hinge 6 on the inner side of the first wedge 1 with a possibility of longitudinal displacement with the lead screw 8 with attached motor 9, and the other, the lever 5, produces articulation between other rack 2' frame and hinge 7 crank arm, and he leans over a horizontal hinge 10 on the inner side of the second rack 2' of the base frame and the hinge 7 of the cranked lever, for its part connected with the piston rod 11 of the power tool 12, and is forced to move either in a curved position 13, or in a reclined position 14, and is rotated around a horizontal hinge 15 and the extension of the piston rod 11. Each wedge pair 1, 1' on its upper side has an oblique surface 16, 16' slide.

Further, the motor 9 through a worm gear 17 is connected with the spacer 4'. Further, the piston rod 11 in the cylinder of the power tool 12 is equipped with a hydraulic device 18 for his nomination. Further, the cylinder power means 12 is located with the possibility of p is a gate around a horizontal axis 15.

With the help of the device according to the invention, advantageously achieves that the removal of rolling stands in a working position lasts only a few seconds. For line rental units in the determination of their parameters, this means more small drive belt, as every second can save directly to the required length of the drive.

Former auxiliary regulators to operate at a speed of about 20 mm per second, now they reach the same goal with a speed up to 40 mm per second.

Setting on the exact position of the rolls for permanent installation lines with different diameters of the rolls takes place by means of a spindle which is designed as a shoulder crank lever. During the rotation of the spindles, for example, the driving motor effective length of the lever in the cranked lever is changed so that the wedge can be positioned in its vertical position. Wedges firmly positioned under the rolling force, as they are propped up by elongated crank lever in cross-section support frames.

The braking is guaranteed by the cuts. The device can be placed on both upper and lower fixed cross member frame. A further advantage is obtained that all the components are simply processed products is I.

1. Device for the alignment of the work rolls in the rolling line, in particular, when four-roll rolling mill, by means of at least one operating on pillows pair of rolls (1, 1') of wedges located in the region between the parallel spaced struts (2, 2') of the bed rolling stands, while the wedges are to move on the horizontal plane of sliding relative to the uprights (2, 2') of the frame by adjusting crank lever, characterized in that the wedges of the pair (1, 1') are connected at regular intervals with each other, when for their shift provided by the Assembly of two cranked levers (4, 5), of which one lever (4) is based on at least one joint (6) wedge (1), and another lever (5) rests, at least one hinge (10) on the opposite rack (2') of the frame, and both levers (4, 5) are connected longitudinally movable hinge (7) of the cranked lever.

2. The device according to claim 1, characterized in that the hinge (7) crank lever connected with the piston rod (11) of the power tool (12)which is mounted on the hinge (15), and through direct and accordingly reverse the piston rod (11) is installed or curved position (13), or a straightened position (14) of the cranked levers (5, 6).

3. The device according to any one of claims 1 or 2, characterized in that the hinge (7) crankshaft richhorror on one of the levers (4, 5) with the possibility of longitudinal displacement by means of the lead screw (8).

4. The device according to claim 3, characterized in that the hinge (7) of the cranked lever is mounted on mounted on the wedge (1) lever (4) with the possibility of longitudinal displacement by means of the lead screw attached to the motor (9).

5. The device according to claim 2, characterized in that the hinge (7) of the cranked lever has located across the axis (x-x) of the lever (4) spacer (4'), on which is hinged the ends respectively of the lever (5) and piston rod (11) of the power tool (12).

6. The device according to claim 1, characterized in that each wedge pair (1, 1') on the upper side has a beveled surface (16, 16') of the slip.

7. The device according to claim 4, characterized in that the motor (9) through a worm gear (17) is connected with the spacer (4').

8. The device according to claim 2, characterized in that the piston rod (11) in the power cylinder means (12) has a hydraulic device (18) for his nomination.

9. The device according to claim 2, wherein said power cylinder means (12) is rotatable about an axis (15).

10. The device according to claim 1, characterized in that each hinge device of a horizontal rotary axis.



 

Same patents:

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

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EFFECT: prevention of pillow turning around roller.

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20 cl, 16 dwg

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FIELD: metallurgy.

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