DE3431020A1 - METHOD AND DEVICE FOR ROLLING FLAT MATERIAL - Google Patents

Abstract

1. A method of technologically influencing rolling stock, principally flat material in the form of plates and strips, in a rolling process, in which a material flow is superimposed on the rolling stock (3) in addition to and simultaneously with the actual material flow which brings about plasticising of the rolling stock (3), characterized in that the material of the thickened portions extending sinusoidally over the width of and orientated at an angle to the rolling direction on both surfaces of the rolling stock, being created by single or multi-spiral beads (4) and/or turned recesses (5) formed sinusoidally in the longitudinal section of the roll body and encircling both roll bodies in opposite directions of pitch are, during the next rolling pass, displaced laterally by rolls having identically constructed or smooth roll bodies from the thicker to the thinner areas of the rolling stock cross-section.

Description

Dr.-lng. WALTER STARK

PATENT ADVERTISER 3A31020

Moerser Strasse 140 D-4150 Krefeld 1 ^ CQ21 51) 28222 and 20469 DSl 8 53

IOG industrial furnace construction company with limited Liability, Im Rottfeld 10, 4000 Düsseldorf 1

Method and device for rolling flat material

The invention primarily relates to a method for technological influencing of rolling stock of flat material in the form of sheets and strips, through a rolling process. The invention relates to also devices for carrying out the process.

When rolling sheet material with narrow widths and length dimensions can be transverse and longitudinal to the rolling stock according to the barrel length of the rolls directed rolling deformations are made, with which a nearly orthogonally isotropic Orientation of the structure as well as the particles of the non-metallic ones shattered during the rolling process Setting inclusions. This cross-wise rolling results in largely orthogonally isotropic Strength and toughness properties of the rolled material.

In conventional rolling of wide and long sheet material, but especially in rolling of tape material are created by the almost

Deutache Bank AG Krefeld 103/1525 bank code 32070080Sparkasse Krefeld 305722 bank code 32050000 postal check Essen 4055-431 bank code 36010043

PATENT ADVERTISER DR. STARK ■ MOERSER STR. 140 · D-4150 KREFCLD ■ ΊΓ (02151) £ .oii: 2 and 20469 · Q3 853578

Eventual deformation of the material in the longitudinal direction mechanical properties of the tape, which are particularly pronounced in this direction, such as pronounced notched impact strengths in the case of metallic material due to a pronounced orientation of the structure as well as the existing ones non-metallic inclusions in the main deformation direction Rolling direction to be viewed, the longitudinal direction of the rolled material strip or sheet.

Due to the breaking up of the non-metallic inclusions during rolling and the main Longitudinal orientation of the individual debris particles creates a notch sensitivity which noticeably reduces the notched impact strength in the transverse direction of the rolling. A similar observation you do this on notched tension rods, where there is a clear connection, for example between the elongation at break or the tensile strength and the sample position in relation to the rolling direction as a whole The range of the test temperature. When dimensioning large pipes, which are manufactured using the longitudinal or screw-seam welding process are these different strength properties of the sheet metal or strip material to be taken into account in the longitudinal and transverse direction. The same applies to the formation of the structure of hot-rolled strip material that is used for the production of grain-oriented sheet metal, from the transformer core for a low-loss conversion of electrical current be produced.

Different material properties in the longitudinal and transverse directions also arise during calendering

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 K ¹ ^ EFELD · fg »(02 '51) ΣΧ222 and 20469 - [g) 853578

of plastic film material of the most varied Qualities.

In many cases these differences are undesirable and require considerable measures to be taken to reduce them, as for example with plastics one transverse stretching process.

The invention addresses the problem of the deformation-related difference in the material properties in the longitudinal and transverse direction of the rolling to reduce in a rolling manner and, if possible, a material with orthogonally isotropic or even isotropic or with particularly good mechanical properties in the direction of rolling to achieve different directions and to create the necessary devices.

According to the invention, the solution to this problem is achieved in that the rolling stock in the roll gap Simultaneously with the actual plasticizing of the rolling stock causing stress / deformation state an additional, from the actual Stress condition / deformation condition different State of stress / state of deformation is superimposed. In a preferred embodiment, the rolling stock plasticized in the roll gap due to the actual state of stress / deformation an additional simultaneously effective state of stress / deformation is superimposed by a Displacement running asymmetrically only over the height or over the height and width of the rolling stock is reached by rolling stock in the roll gap.

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 D-41C0 KREF £ L0 'S? foil 5Ί) V.bZiZ and 20469 - Qg 853578

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The different displacement of rolling stock in the roll gap arises as a result of the roll barrel dipping to different depths into the rolling stock different roll barrel diameters.

With a completely different objective, rolling on a flat roller track with different Diameter of the cylindrical roll barrel of top and bottom roll when rolling bimetal material made to the different deformation strengths of the two in one casting process metal layers joined together in a molten state for the purpose of a homogeneous, over to take into account the elongation of the rolling stock running across the cross-section.

According to a further preferred embodiment an additional, simultaneous with the actual state of stress / deformation becomes more effective Stress state / deformation state oriented transversely to the rolling direction achieved when the centrally circumferential beads and / or circumferential Turnings generated on or in the roll barrel on the rolling stock in the longitudinal direction of the roll the rolling stock width sinusoidal thickenings of the rolling stock during the next roll pass . with the same rollers after a lateral displacement of the rolling stock by a maximum of half Period of its sinusoidal thickness running across the width of the rolling stock from the thicker to the thinner Rolled stock cross-section areas is displaced laterally.

According to another embodiment can

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-1150 KREFELD ■ ° g? (02'5I) 2E222 & 20469 · Qx] 853578

an additional one oriented transversely to the direction of the river Achieve the state of tension / state of deformation in that with axially arranged rollers the material of the single or multiple helical shape, with both roll barrels in opposite directions Direction of slope circumferential, in the roll barrel longitudinal section sinusoidal beads and / or indentations generated on both rolling stock surfaces $ oriented at an angle to the rolling direction over the width of the rolled stock is sinusoidal, running thickenings on the next roll pass of rolls with the same or with smooth roll barrel from the thicker to the thinner rolling stock cross-sectional areas laterally is displaced.

According to another embodiment of the invention In the process one gains the additional, simultaneous with the actual, the plasticization of the rolling stock causing stress / deformation state by a in the rolling direction and / or Rolling transverse direction frictionally and / or positively, in the same direction in both rolling stock surfaces or oppositely acting forced guidance of the rolling stock surfaces, the rolling stock layers close to the surface or the horizontal halves of the rolling stock.

The additional, simultaneously with the actual, the state of tension / deformation causing the plasticization of the rolled stock is in its Effectiveness significantly enhanced by a combination of one about the height and / or width of the Rolled stock asymmetrical displacement of the rolled stock with a forced guidance of the rolled stock surfaces or the near-surface layers of rolled material in the roll gap.

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 ■ D-4150 KR3FELD ■ <gp (02-51) 28222 v .. 2C469 · Qx] 853578

The invention also includes devices for Implementation of the method according to the invention.

According to a simple embodiment, the Displacement of rolling stock in the roll gap, which runs asymmetrically over the height of the rolling stock, by cylindrical roll bodies of different diameters achieved.

In addition to the asymmetrical displacement of the rolling stock over the height of the rolling stock, an additional, To force the displacement of rolling stock extending over the width of the rolling stock, according to proposed another embodiment, the crossed or axially parallel roll barrel delimiting the roll gap with a constant sum the opposite roll barrel diameter continuously over in the longitudinal direction of the roll barrel the roll barrel length variable roll barrel diameter to be provided.

According to a preferred embodiment, the Asymmetrical displacement of rolling stock in the rolling stock height and width Roll gap achieved by a crossed or axially parallel roll barrel pair, in which the sum the opposite one, in the longitudinal direction of the roll barrel continuously over the length of the roll barrel variable roll barrel diameter constant and the diameter of both roll barrel in the roll barrel center is of the same size.

According to another embodiment can an asymmetrical over the width of the rolling stock running de displacement of rolling stock in the form of a one-sided

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 D-4150 KREfELD Ί £> (02ΙΪ.1) X822- »and 20469 · Q3 853578

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Spreading of the rolling stock through an axially parallel one Reach roll barrel pair with centrally rotating beads and / or indentations into which the rolling stock can drain off laterally.

According to a further embodiment, a Forced guidance of the rolling stock surfaces or the layers of rolling stock close to the surface in the rolling direction by a torque and / or rotational speed different sized drive of the smooth or roughened delimiting the whale gap Roll barrel reached.

In rolling practice, heavy plate is rolled with a completely different objective Moving the different rotational speeds briefly when piercing the rolling stock and only applied there to by a slightly greater speed of rotation of the lower roller compared to the Top roll to give the outgoing rolling stock a slight curvature upwards. One aims and thus achieved that in particular the first roller table roller, the so-called stand roller, no experiences excessive shock loads from the rolling stock.

A forced guidance of the rolling stock surfaces resp. the near-surface layers of rolling stock in the transverse direction of the rolling are achieved, according to another embodiment, by crossing the rolls in the rolling plane, a symmetrical to the rolling direction designated, slightly opposite pivoting of the Roller balls around the roller ball centers. The rolls crossed in the rolling plane can smooth, roughened and / or provided with centrally circumferential beads and / or indentations own.

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFELD · ^ g- (021-51) 28222 and 20 * 6H · Qx] 853578

To avoid the difficulties associated with the design of the bearing when the rollers cross To avoid the rollers, it is proposed that, in the case of axially parallel rollers, one transverse to the rolling direction oriented forced guidance of the rolling stock surfaces and the layers of rolled material close to the surface by means of roll balls with multi-thread helical lines to achieve circumferential beads and / or turns.

According to a preferred embodiment, at axially parallel rolls one effective in the rolling direction, opposite in both rolling stock surfaces Directed forced guidance of the rolling stock surfaces, the layers of rolling stock close to the surface or the horizontal halves of the rolling stock through multi-thread helical lines in the same direction in both roll bodies left or right with the same or unequal slope circumferential Bulges and / or indentations can be achieved.

According to another preferred embodiment in the case of axially parallel rolls, one can be moved in the transverse direction of the roll effective forced guidance of the rolling stock surfaces in the same direction in both rolling stock surfaces, of the layers of rolling stock close to the surface as well as both horizontal halves of rolling stock and thus the entire rolling stock cross-section in the roll gap through opposite in both roll barrel multi-thread helical with the same Reach circumferential bulges and / or indentations.

In order to achieve a force-fit and form-fit connection in both rolling stock surfaces in the transverse direction of the rolling

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFELD · ^ (021 GT, 26222 and 20fbi <· [Tx] 853578

acting in the opposite direction in the cross-rolling direction Forced guidance of the rolling stock surfaces or the rolling stock layers close to the surface in the case of axially parallel Rolling in the roll barrel to compensate axial forces that arise in the roll barrel proposed both roll barrel with similar, multi-thread helical lines in one Roller barrel half with the same size or itself changing slope left-hand circumferential, in the other roll barrel half with right-hand circumferential to provide bulges and / or indentations that change the direction of the pitch in the center of the roll barrel.

It is also proposed an asymmetrical Over the height of the rolling stock running displacement of rolling stock with a non-positive and / or positive positive guidance of the rolling stock surfaces or to superimpose the rolling stock layers near the surface that in a crossed or an axially parallel cylindrical roller barrel pair with unequal roll barrel diameters smooth Roller barrel or roller barrel with centric circumferential beads and / or grooves are used. According to another feature of the invention it is proposed that for the purpose of superimposing an asymmetrical over the height and width of the rolling stock running displacement of rolling stock with a forced guidance of the rolling stock surfaces or the A crossed or an axially parallel pair of rollers is used for rolling stock layers close to the surface where the roll barrel diameter in the roll barrel center is the same or unequal, the sum of the opposing roll barrel diameters is constant and the roll barrel with multiple helical encircling

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 D-4150 KREFELD ° ξ £ (02131) £ 8222 ü. 2046 & - [fr] 853578

Bulges and / or indentations with constant or changing over the roll barrel length, in both roll bodies in the same direction or in opposite directions Slope are provided.

In the rolling processes described above, in particular in the processes with positive guidance the rolling stock surfaces or those close to the surface Layers of rolled material generate axial forces of the same order of magnitude as the actual plasticization of the rolling stock causing rolling forces. To absorb and dissipate these axial forces, it is proposed that the axial forces on the side opposite the drive of the rollers, the operating side of the roll stand, in the suitably equipped with axial bearings and locking devices Take up roller bearing components. In the case of a four-high mill stand, the axial forces from the Work roll ball over the associated back-up roll and its axial bearings in a support bar and from there to be transferred to a transverse frame structure.

According to a preferred embodiment, the two cross frames have crossbars in the area the axial forces occurring in the amount of the work roll axes or the back-up roll axes in the Both roll stands are integrated and connected to one another in the middle of the roll stand.

In order to be able to retrofit conventional roll stands to absorb the axial forces at the level of the work rolls or the support rolls, it is proposed to provide separate cross frames on the inlet and outlet side of the roll stands.

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFtLD · "^ (021ED £ 8222 and 23433 · [Tx] 853578

see attached to the roll stands. It is advisable to have one work roll from the drive side and the other work roll from the operating side of the roll stand and the axial forces on the respective drive on the opposite side in axial bearings.

The invention is based on drawings in but only preferred embodiments of the invention are shown. It shows:

Fig. 1 shows a piece of conventionally rolled flat material with the possible sample positions,

Fig. 2 schematically shows the required, on the

notched residual cross-section related fracture work of the notched impact test specimens on the test temperature and the position of specimens a to d or specimen notch k to the rolling direction WR according to Fig. 1,

Fig. 3 is a plan view of one in the rolling plane

non-parallel (crossed) pair of rollers with smooth roll barrel and rolling stock.

FIG. 4 shows a view of FIG. 3 against the rolling direction WR and rolling stock,

Fig. 5 is a plan view of one in the rolling plane

non-parallel (crossed) roller pairs, whose roll balls are provided with circumferential bulges and indentations, with rolling stock,

Fig. 6 is a view of Fig. 5 against the rolling

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFELD "g ³ (02131) 28222 and 20463 · Qx] 853578

-yi- ■ M.

direction WR with rolling stock,

7 shows the plan view of the axially parallel upper one

Roll barrel of a pair of rolls with a helical shape in the same direction to the left circumferential bulges and indentations and rolling stock,

8 shows a view of FIG. 7 against the rolling direction WR and rolling stock in the roll gap,

9 shows the plan view of the axially parallel upper one Roll barrel with helical shape constant pitch in one roll barrel half on the left, in the other roll barrel half on the right circumferential bulges and Indentations and rolling stock before and after the rolling pass,

FIG. 10 is a view of FIG. 9 contrary to FIG

Rolling direction WR and rolling stock in the roll gap,

11 is a plan view of the axially parallel upper one Roll barrel with helical shape circumferential bulges and indentations with rolling stock before and after the rolling pass,

. FIG. 12 is a view of FIG. 11 contrary to FIG

Rolling direction WR and rolling stock in the roll gap,

13 shows a view of a pair of rollers with roller bodies arranged conically in opposite directions against the rolling direction WR and rolling stock in the roll gap,

Fig. 14 is a plan view of the rolled material

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFiLD · 1, ° $ 215 "!) 23222 and 2C46S · [g] 853578

from Fig. 13,

15 shows a partial section from a roller barrel pair with centrally rotating beads and indentations, with rolling stock in front of the roll gap and in the roll gap,

16 shows a cross section through a roll gap, that of axially parallel cylindrical Roll barrel with co-directional helical shape circumferential beads and indentations is limited and rolling stock,

17 shows a partial view of the roll gap of FIG. 16 against the rolling direction WR, in which both roll bales with the same direction, here on the left helical circumferential Bulges and indentations are provided,

18 shows a volume element made from the material in the roll gap of FIG. 16 or FIG. in a spatial representation with the stresses acting on it,

19 shows the matrix of the stresses effective on the volume element of FIG. 18,

16a shows a cross section through a roll gap, that of axially parallel cylindrical Roll barrel with oppositely helical shapes circumferential beads and indentations is limited and rolling stock,

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFHuD · fg ' 10215 "·) U * i222 and 20459 · [Tx] 853578

-M-

17a is a partial view of the roll gap of

16a against the rolling direction WR, in which both roll bodies with opposite directions, the upper roller 1 with the right, the lower roller Z with the left, rotating helically Bulges and indentations are provided,

18a shows a volume element made from the material of the upper half of the roll gap in FIG spatial representation with the stresses acting on it,

19a shows a volume element made of the material

the lower half of the roll gap in

spatial representation with the stresses acting on it,

16b shows a cross section through a roll gap,

which is limited by conical roller balls running in opposite directions,

Fig. 17b is a partial view of the roll gap of

16a against the rolling direction WR,

18b shows a volume element made of the material

in the roll gap in a spatial representation with the stresses acting on it,

19b shows the matrix of the stresses acting on the volume element,

Fig. 20 is a partial view of a four-roll rack

with the two work rolls, whose oppositely oriented axial forces A about their storage units are included.

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFELD - «g> (021 51; 2822? U. Z \ W? ■ jg] 853578

3A31020 - «> - Xl.

21 shows a partial view of a backup roll with its work roll, the axial force of which A is taken up by a circumferential collar of the support roller,

Fig. 22 shows details of Fig. 21, Fig. 23 shows details of Fig. 22,

24 shows a partial view of a backup roll with its work roll, the axial force A is picked up by the back-up roller,

Fig. 25 is a side view of the rollers of Fig. 24,

26 shows a four-high roller with a derivation of the axial forces A in the back-up rolls,

27 is a side view of the four-high rolling mill of Fig. 26,

Fig. 28 is a three-dimensional representation of the two columns of a roll stand, which by Crossbars are connected to each other,

29 shows a schematic representation of a four-high rolling stand with additional cross frames,

30 is a side view of the four-high rolling mill of Fig. 29,

31 shows a four-high roll stand with directly axially supported and driven by the drive or the operator side driven work rolls,

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREF £ lD ■ '- · & Ϊ02Ϊ5ΐΓ2 ^ 222- h'. 20 * (& · [Tx] 853578

- V6 -

32 shows a work roll with its axial

Support.

Conventional sample layers a, b, c, d are shown in FIG. Two sample layers each are in the rolling direction or taken transverse rolling direction. The position of the notches k, the predetermined breaking points in the notched impact test is chosen with different orientations.

In Fig. 2 are the different Breaking work depending on the position of the sample in relation to the rolling direction WR and the position of the notch k shown in the sample (Fig. 1). The different values of the fracture work in the high and Deposits can be seen in the entire temperature range.

In Fig. 3 is a plan view of a crossed, non-parallel pair of rollers with smooth roller balls. The torques M- | and M2 driven rollers 1,2 strive to force their respective rolling stock surface in their own direction of rotation Rj (upper roller 1) or R ₂ (lower roller 2) via the friction between the roll barrel and the rolling stock surfaces, whereby the axially directed forces A are established . The rolling stock is subjected to an additional shear load oriented transversely to the rolling direction.

In FIG. 4, the roll gap formed by the crossed pair of rolls 1, 2 is seen from the outlet side shown. The surface forces 0 (in the rolling stock surface) and u (in the rolling stock undersurface), both effective in the roll gap, produce the transverse

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFELD · & (C2151) 23222 U. 2046S · Qx] 853578

additional shear stress oriented to the direction of rolling, from which the inclination of the expiring rolling stock cross-section with the Thickness h- | compared to the rectangular cross-section of the Rolling stock 3 adjusts on the inlet side with the thickness h. The sum of the reaction forces ö or ü is in equilibrium with the axial forces A.

In Fig. 5 the plan view of a crossed (non-parallel) pair of rollers 1, 2 with circumferential beads 4 and indentations 5 is shown. As a result of the rolling pressure, the beads 4 are pressed into the rolling stock, while the rolling stock 3 rises into the indentations. The torques Mj and M ~ drive the rollers 1, 2. Each roller strives to move the surface areas, which it encompasses in a form-fitting manner by means of the beads 4 and indentations 5, in its own direction of rotation R, (rolling stock surface) or R _? To force (rolling stock lower surface), with a transverse to the rolling direction WR oriented shift of the plasticized rolling stock 3 takes place in the roll gap. The additional shear stress of the rolling stock 3 in the roll gap, transverse to the rolling direction WR, allows the forces A acting in the direction of the axes of the rolls and 2 to arise. Corresponding to the bulges 4 and the indentations 5 of the rolls 1 and 2, depressions 4 or elevations 5 are formed on both rolling stock surfaces, which in both rolling stock surfaces are inclined in opposite directions to the rolling direction WR, parallel to the directions of rotation R and R _? the rollers 1 and 2 are oriented.

In Fig. 6 is that of the crossed roller pair

PATENT ADVERTISER DR. STARK ■ MOERSER STR. 140 ■ D-4150 KREFSlD · % ° '.0215 ¹ ) 28222 u. ? .E <£ S · [Tx] 853578

1.2 formed roll gap shown from the outlet side. Both rollers 1, 2 strive to the surfaces of the rolling stock 3 that are positively grasped by them with the beads 4 and the indentations 5 in its own direction of rotation R- or R ~ (Fig. 5) to force. The resulting surface forces ο in the rolling stock surface and u in the The rolling stock undersurface of the rolling stock 3 causes the plasticized material to shift in the roll gap Rolled material 3 transversely to the rolling direction WR, with reaction forces δ and ü, the sum of which is the size corresponds to the axial forces A. As a result of the transverse, additional shear stress the running out cross-section of the rolling stock 3 is correspondingly inclined with respect to the rectangular one Inlet cross-section.

In Fig. 7 the roll barrel is the top roll 1 of an axially parallel pair of rollers with a helical shape (here on the left) circumferential beads 4 and indentations 5 are shown. The bulges 4 are pressed into the rolling stock 3, while the rolling stock 3 rises into the grooves 5. The roller 1 receives this creates a form-fitting shear connection with the rolling stock 3 in the direction of its axis of the rolling stock 3, depressions 4 and elevations 5 are created at an angle to the rolling direction WR. The roller is driven by the torque M-j. The rolling stock 3 is transported in the rolling direction WR.

In Fig. 8 is the roll gap formed by the roll barrel of an axially parallel pair of rolls 1, 2 shown from the outlet side. Both roll barrels are helical (here left) circumferential beads 4 and indentations 5

PATENT ADVERTISER DR. STARK ■ MOERSER STR. 140 · D-4150 KRErELD ■ ff (02131) 282Z2 and £ 0469 · [Tx] 853578

3Α3Ί020

- T9 -

Mistake. The Walezn 1,2 are driven by the torques Mι, M ₂ . Each roller 1, 2 strives to move the surface of the rolling stock 3, which is positively grasped by it by means of the beads 4 and indentations 5, in its own circumferential direction R or R _? (Fig. 7) to transport. The surface forces ο and u thus created cause the plasticized rolling stock 3 to slide transversely to the rolling direction. The sum of the reaction forces ö and ü forms the axial forces A. The side surfaces of the rolling stock 3 are inclined according to the transverse shear stress.

In Fig. 9 the roll barrel is the top roll an axially parallel pair of rollers shown in plan view. The roll barrel has a helical shape in one roller barrel half on the left, in the other roller barrel half on the right, changing the direction of incline in the center of the roll barrel Beading 4,4 'and indentations 5,5' which on the rolling stock 3, the depressions 4, 4 'oriented at an angle to the rolling direction WR Generate elevations 5,5 '. The rolling stock 3 is appropriate before the start of rolling with one that runs in the rolling direction WR, for example one that runs around it Bead created in a roller relief groove 6a provided, which after the roll passage as a groove 6b of smaller width and depth appears. The roller 1 is driven by the torque M-j.

In Fig. 10 is the roll gap formed by the roll barrel of an axially parallel pair of rolls 1, 2 shown from the outlet side. Both roll barrels are in a helical shape

PATENT ADVERTISER DR. STARK ■ MOERSER STR. 140 ■ D-4150 KREFELD - ° § "(021.51) ± Kl £. U.? 0 <W ■ Ο 853578

one roller barrel half on the left * in the other roller barrel half on the right, in the roller barrel center the direction of slope changing bulges 4,4 'and indentations 5,5'. In their own opposite roll barrel halves is the The direction of inclination of the helically encircling beads 4,4 'and indentations 5, 5' are in the same direction. With this formation of the roll barrel surfaces there are no external axial forces. The rollers 1,2 are driven by the torques M- ,, KL. The flow movement of the rolling stock 3 is indicated by arrows.

11 shows the roll barrel of the upper roll 1 of an axially parallel pair of rolls with helically (here on the left) circumferential bulges 4 and indentations 5. The roll barrel is driven by the torque M-. The width b of the rolling stock 3 increases on one side as it passes through the rollers to b + -Δ b. ^{On the rolling stock 3, depressions 7} F and elevations ^ ″ are formed correspondingly obliquely to the rolling direction WR.

In Fig. 12, the roll gap formed by the roll barrel of an axially parallel pair of rolls 1, 2 is shown seen from the outlet side. The roll barrel of the upper roll 1 is provided with helical left, the roll barrel of the lower roller 2 with helical right circumferential bulges 4,4 'and recesses 5,5', which give the rolling stock 3 in the roll gap a one-sided widening 3a by the amount b. The roller 1 is driven by the torque M- ,, the roller 2 by the torque M _? driven.

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 D-4150 KREFElU ff> (0215.) ib22k and 204.S9 ■ [Tx] 853578

13 shows an axially parallel roller pair 1, 2 with conical roller balls 7, 7 'running in opposite directions. The roll balls 7,7 'displace volumes of the rolling stock 3 of different sizes in the roll gap as a result of the opposing different roll barrel diameters. The rolls 1,2 are driven by the torques M · ,, M _? driven. As a result of the inclination of the roll barrel surfaces in relation to their axes of rotation, axial forces A arise. As a result of the different stretching of the surfaces of the rolling stock 3 (Fig. 14: L ^ L _r , V \> \. ') , The surfaces of the rolling stock are braced.

In Fig. 14 the plan view of a with is opposite conical roll barrel 7.7 'rolled rolling stock

3 shown. Due to the different displacement of the rolling stock 3 in the roll gap (FIG. 13) over the width there are different elongations the rolling stock surface areas represented by the length arrows L ·., Li, L, L ', measured from the Baseline g-g.

In Fig. 15 is a partial section of an axially parallel Roller pair 1,2 with circumferential beads

4 and recesses 5 shown. The rolling stock 3, in a previous rolling pass in the

• piles 5 oriented in the rolling direction, is after a slight lateral displacement before its entry into the roll gap through the circumferential beads 4 of one roller in the circumferential indentations 5 of the other roller laterally repressed. The contour ί, ϋΓ entering the roll gap has the shape of the roll gap at the roll gap exit 4.5 accepted. An element dV of the rolling stock 3 has been shifted laterally by db.

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFELC · & (02151) 28222 and 20409 · Qx] 853578

16 is a longitudinal section through one of the axially parallel pair of rollers 1, 2 Roll gap with the on a volume element dV of the rolling stock 3 in the of the axes (1) and (2) Spanned longitudinal sectional plane acting stresses (T .. (i *, j = 1,2) shown. The stresses with the same indices i = j are normal stresses, those with unequal indices i ^ j are shear stresses.

17 is a partial section of the side view 16 of the axially parallel rollers 1.2 limited roll gap against the rolling direction WR (Fig. 16). The rollers 1,2 are with in the same direction (here left) helically circumferential beads 4 and 5 indentations provided.

^{The additional shear stresses έΓ-, ο =} 6 ^ _{1 act} on the volume element dV of the rolling stock 3 in the roll gap in the cross-sectional plane spanned by the axes (1) and (3). The stresses with the same indices are normal stresses, those with unequal indices are shear stresses.

18 shows a volume element dV des spanned by the orthogonal spatial axes (1), (2), (3) Rolled stock 3 in the roll gap (Fig. 16, Fig. 17) in a spatial representation. The volume element dV is given by the voltages (T.. (i, j = - 1,2,3) claimed.

In Fig. 19 is the matrix of the associated stress state shown in the roll gap (Fig. 16, Fig. 17). When rolling with on both rollers 1,2 in the same direction helically circumferential Bulges 4 and indentations 5 (Fig. 17) are the conventional, essentially flat tension

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFCLD · ® (0215 ^J. ) 23222 and Z04o3 ■ [g] 853578

- 30-
- -2-3 -

state 6 ~. . (i, j = 1,2), as is the case when rolling on a smooth rolling track, additional shear stresses 6 ^ ₃ = 6 ^ 1 lying transversely to the rolling direction WR (Fig. 16) are superimposed in the roll gap. The axial rolling force A of FIG. 8 corresponds to these shear stresses oriented transversely to the rolling direction.

FIG. 16a corresponds to FIG. 16.

In Fig. 17a is a partial section of the side view 16a of the roll gap delimited by the axially parallel rolls 1, 2, opposite to the rolling direction WR (Fig. 16a). The roller 1 is with a helical right, the roller 2 with helically left circumferential bulges and indentations 5, through which the rolling stock is spread on one side with a corresponding rotation the main deformation direction from the rolling direction WR learns. The volume elements dV are in the upper or lower half of the roll gap in the cross-sectional plane spanned by axes (1) and (3) through the stresses (Γ.. (I, j = 1,3) claimed.

'J

18a shows the volume element dV des spanned by the orthogonal spatial axes • (1), (2), (3) Rolled stock 3 in the upper half of the roll gap (Fig. 16a, Fig. 17a) in a spatial representation with the totality of all stresses acting on it (T. (i, j = 1,2,3).

19a shows the volume element dV des spanned by the orthogonal spatial axes (1), (2), (3) Rolled stock 3 in the lower half of the roll gap (Fig. 16a, Fig. 17a) in a spatial representation

PATENT ADVERTISER DR. STARK ■ MOERSER STR. 140 ■ D-4150 KREFELD - Ί? (02.51) 2G222 and £ 046 «· fg] 853578

3A31020

with the totality of all stresses acting on it (T .. (i, j = 1,2,3). The same direction of (T, ₃ and δ ' ¹ , - indicates that the rolling stock 3 (Fig. 16a, Fig. 17a) spreads on one side, with no axial reaction forces A occurring in the rollers (Fig. 12).

16b shows a longitudinal section through one of two rollers 1, 2 with oppositely conical ones Roll gap limited roll gap with the volume element dV of the rolling stock 3 in the of Tensions 6 ~ - · (i, j = 1,2), 6 ^ acting on axes (1) and (2) spanned longitudinal sectional plane. The stresses with the same indices are normal stresses, those with unequal indices are shear stresses.

FIG. 17b shows a partial section of FIG. 16b of the roller gap delimited by the rollers 1, 2 with conical roller balls running in opposite directions. On the volume element dV of the rolling stock 3 grip in the cross-sectional plane spanned by axes (1) and (3) the additional shear stresses 6 "·,., = 6%, simultaneously with the stresses of the plane stress state (T.. (i, j = 1,2).

'J

.Fig. 18b shows one of the orthogonal spatial axes (1), (2), (3) spanned volume element dV des Rolled stock 3 in the roll gap of FIG. 16b or 17b in a three-dimensional representation with the entirety of the applied stresses 6 "·· (i, j = 1,2,3).

19b shows the matrix of the stress state in the roll gap in the case of oppositely conical roll bodies. The plane span marked by dashed lines

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFELO · ^ g ⁵ (('21M) 28? 22 -j. 29469 ■ (Yes 853578

' IJL.

state of tension is expanded to a spatial state of tension, in particular by the tensions 6 ^ _{3 = 6 ^.}

Fig. 20 shows part of a four-high rolling stand with the support rolls ~ \ ', 2', of which the work rolls 1, 2 are supported. The work rolls 1,2 are stored in their bearing components 8,9. The opposite axial forces A are short-circuited via the fork of the bearing component 8 and the groove 9a of the bearing component 9, so that no axial force is transmitted to other structures of the roll stand.

Fig. 21 shows the axial bearing of the backup roll 1 'and the transmission of the axial rolling force A from of the work roll 1 via a wear ring 12 carried by a support ring 11 into the side ring 13 of the support roller 1 '. The axial force A is applied to the bearing pin Is of the support roller 1 ' Thrust bearing 14s initiated, taken over by the support bar 15s and on a not shown Transfer cross frame. The work roll 1 with its work roll barrel is driven by the torque Μ-, driven.

FIG. 22 shows a partial section of FIG. 21 The axial force A from the work roll 1 is via the support ring 11 and the wear ring taken over by the side ring 13 of the support roller 1 ". The wear ring 12 made of wear-resistant metallic or non-metallic material is with metallic or non-metallic reinforcement 16 reinforced.

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 D-4150 KREFE'.u <g> (C21 51) 28122 -J. 204 CS ■ Qg] 853578

3A31020

Fig. 23 shows a cross section through a support ring Π. The wear ring 12 of FIG. 22 is divided here into an elastic, non-metallic one Part 12b, made by a wear-resistant metallic part 12a is protected.

24 shows the arrangement of a metallic wear ring 11a between the end face the work roll 1 and the rotating side ring of the support roll K The wear ring lla is with screws lib on the face of the work roll barrel attached. The axial force A is in the area F (Fig. 25), the overlap of the two annular surfaces of the wear ring lla and of the side ring 13 of the support roller 1 ', transferred.

FIG. 25 shows FIG. 24 in a side view with the transfer surface F for the axial force A. 24, the overlap of the two ring surfaces of the wear ring 11a and the side ring 13 of the back-up roll T.

Fig. 26 shows the view of a four-high roll stand opposite to the rolling direction WR of FIG Support rollers 1 ', 2', the support roller journals la, 2a, the axial bearings 14s are transferred to the support bars 15s and are taken over halfway through the upper and lower double cheeks 20 from the front and rear transverse frames. The cross frames are supported by the cross arms 18 1, 18 r and the middle parts of the roll stands 17 1,

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 D-4150 KREFELO ⁰ S? (H21S1 * 28222 and 20 «R9 ■ [g | 853578

17 r formed. The cross arms 18 1, 18 r are through the bolts 19 connected to one another.

27 shows the side view of a four-high rolling stand with the back-up rolls 1 ', 2', which form the work rolls support zen 1,2. In the double cheeks 20, the support bars 15s are fastened with hinge pins 20s.

Fig. 28 is a parallel perspective view of the two roll stands 17 1 and 17 r, which through the upper and lower cross arms 18 1, 18 r by means the bolts 19 are connected. Through this connection a front and a rear cross frame is created with the cross arms 18 1, 18 r as cross frame bars. The frame posts 17s simultaneously represent the posts of the two roll stands 17 1, 17 r The position of the transverse frame bars with the transverse arms 18 1, 18 r is due to the approximate position the axes of the backup rolls 1 ^ 2 'given. In their extension are the upper and lower ones Double cheeks 20 in which the support bars 15s (Fig. 21, Fig. 26) with hinge pins 20s (Fig. 27) to absorb the axial forces of the backup rollers 1 ', 2' (Fig. 26) are attached.

29 shows the two roll stands 17 1 ₅ 17 r of a four-high rolling frame with the cross frame 21 on the outlet side, which is fastened with bolts 22 to the two roll stands 17 1, 17 r. The axial force A of the upper work roll 1 (Fig. 8) is via the axial bearing Ha (Fig. 32) of the upper work roll 1, the support bar 15a, the axial force A of the work rolls 2 (Fig. 8, Fig. 21) via the rotating side ring 13 of the support roller 1 \ the thrust bearing 14s of the lower

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 D-4150 KREFELD 1? (OU 51) 2B222 U-20469. · [Tx] 853578

The support roller 2 'and the support bar 15s are each half on the front (outlet side) and half on the rear Transverse frame 21 (on the inlet side) transferred. Both cross frames 21 have sufficiently large openings for unhindered access to the work rolls 1,2.

Fig. 30 shows a side view of the cross frame of Fig. 29. The work rolls 1,2 are of their support rollers 1 ', 2' supported. The axial force of the upper work roll 1 is controlled by the support bar 15a, that of the lower work roll 2 via the circumferential side ring 13 of the support roll 2 'from Support bolt 15s taken over and half to the front and the rear cross frame 21 to hand over.

31 shows a four-high roll stand with the backup rolls 1 ', 2', by which the work rolls 1, 2 are supported. The work rolls 1, 2 are driven by the torques M and M2 from opposite sides of the four-high rolling stand. Half of the axial forces A are deposited on the sides opposite these drive sides via axial bearings 14a (FIG. 32), support bars 15a, double cheeks 20 and bolts 20a, each half in the front and the rear cross frame. The bars of the transverse frames, which in this case lie approximately at the level of the axes of the work roll bales 1, 2, are formed from the transverse arms 18 1, 18 r integrated into the roll stands 17 1, 17 r, which are connected to one another with the aid of the bolts 19 .

Fig. 32 shows the top view of the upper working

PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFEl Ü · "g» (0ί15 · ») 28222 l ·." 20469 · [Tx] 853578

- afc-

roller 1 of Fig. 31 with its roll barrel, the Axial bearing 14a, the support bolt 15a, which is fastened with the bolts 20a in the double cheeks 20 is. About the cross arms 18 1, 18 r and the bolts are the two uprights 17 1, 17 r of the roll stand connected with each other. The roller 1 is acted upon by the torque M-, whereby the axial force A is created.

Claims (1)

Dr.-Ing. WALTER SlARK PATENT ADVERTISER 34310! Moerser Straße 140 D-4150 Krefeld 1 «S ¹ (021 51) 28222 and 20469 (Sl 8 53 Expectations: 1. Technological influencing method of rolled stock, primarily flat material in the form of sheets and strips, in one Rolling process, characterized in that the rolling stock simultaneously with the actual, the The stress state / deformation state causing plasticization of the rolled stock an additional, stress state / deformation state that deviates from the actual stress state / deformation state is superimposed. 2. The method according to claim T, characterized in that the additional, the rolling stock in Roll gap simultaneously with the actual, the stress state / deformation state causing the plasticization of the rolled material one that runs asymmetrically only over the height or over the height and width of the rolling stock Displacement of the rolling stock is achieved in the roll gap. 3. The method according to claim 1 or 2, characterized in that of centrally rotating Bulges and / or indentations on or in the roll barrel on the rolling stock in the rolling longitudinal Deutsche Bank AG Krefeld 103/1525 BLZ 32070080 Sparkasse Krefeld 305722 BLZ 32050000 Postal check Essen 4055-431 BLZ 36010043 PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFFLD ■ ° §ξ · (02131) 2C222 and £ 0 ', 30 · Qx] 853578 direction generated, sinusoidally extending thickenings of the rolling stock over the width of the rolling stock on the next roll pass with the same rolls after a lateral shift of the rolling stock by a maximum of half a period of the sinusoidal over the width of the rolling stock Material thickness from the thicker to the thinner rolling stock cross-sectional areas laterally be displaced. Method according to one of Claims 1 to 3, characterized in that the material that of single or multiple helical shapes, with both roll barrels in opposite directions Direction of slope circumferential, in the roll barrel longitudinal section sinusoidal beads and / or indentations generated on both Rolled stock surfaces at an angle to the rolling direction oriented over the width of the rolled material sinusoidal thickenings with the next roll pass of rolls with the same formed or with smooth roll balls from the thicker to the thinner rolling stock cross-section areas is displaced laterally. The method according to claim 1, characterized in that the additional, simultaneously with the actually the plasticization of the rolling stock causing stress state / deformation state by a force-fit and / or form-fit in the rolling direction and / or transverse direction, in the same direction in both rolling stock surfaces or oppositely acting forced guidance of the rolling stock surfaces, the ones close to the surface Rolled stock layers or the horizontal rolled PATENT ADVOCATE DR. STARK · MOERSER STR. 140 ■ D-4150 KRPFE'.D · If (02151) ^ 82 ^ 2 and 20469 · Rg] 853578 - 3 halves of the gut is reached. 6. The method according to any one of claims 1 to 5, characterized in that the additional, the state of tension / deformation that brings about the plasticization of the rolled stock a combination of one that runs asymmetrically over the height and / or width of the rolling stock Displacement of the rolling stock with forced guidance of the rolling stock surfaces or those close to the surface Walzgutschichten is achieved in the roll gap. 7. Device for performing the method according to one of claims 1 to 6 with work rolls, the associated roll barrel one Form roll gap for the rolling stock, characterized in that for the asymmetrical Displacements of rolling stock (3) in the roll gap, roll barrel, running over the height of the rolling stock different diameters are provided. 8. Apparatus according to claim 7, characterized in that for the unbalanced over the rolling stock height and width running displacement of rolling stock (3) in the roll gap crossed or axially parallel roll balls are provided, which at constant sum the opposite roll barrel diameter continuously variable in the longitudinal direction of the roll barrel over the roll barrel length Have roll barrel diameter. PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KREFELi) ■ Ί? (02151) 2 * 22ί · u. XU469 · [g] 853578 9. Device according to claims 7 or 8, characterized in that the roll barrel Roll barrel diameters of the same size in the roll barrel center own. 10. Device according to one of claims 7 to 9, characterized in that both roll bodies are provided with circumferential beads (4) and / or indentations (5) into which the rolling stock (3) can flow off to the side. 11. Device according to one of claims 7 to 10, characterized in that for the positive guidance of the rolling stock surfaces or the surface names Rolled stock layers in the rolling direction in the torque and / or the rotational speed differently large drive of the roll gap limiting smooth or roughened rollers (1,2) is provided. 12. Device according to one of claims 7 to 11, characterized in that for the forced guidance of the rolling stock surfaces or the near-surface Rolling material layers in the rolling direction in the rolling plane crossed rollers (1,2) provided are. 13. The device according to claim 12, characterized in that that the rollers (1,2) crossed in the rolling plane are smooth, roughened and / or with have centrally rotating beads (4) and / or indentations (5) provided roller balls. PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KfIEFELD · "g» ', 02151) 28222 t :. 2C469 · Qx] 853578 14. Device according to one of claims 7 to 11, characterized in that in the case of axially parallel rollers (T, 2) their roller balls are multi-thread helical circumferential beads (4) and / or have indentations (5). 15. The device according to claim 14, characterized in that that both roll barrel with multiple threads helically left or right with equal or unequal pitch circumferential bulges (4) and / or indentations (5) are provided. 16. The device according to claim 14, characterized in that that both roll barrel with oppositely multi-thread helical lines are provided with the same slope circumferential beads (4) and / or indentations (5). 17. The device according to claim 14, characterized in that that in order to compensate for the resulting axial forces, both roll balls with similar, multi-thread helical lines in one roll barrel half with the same large or changing slope on the left, in the other roll barrel half with the right circumferential bulges (4) and / or indentations that change the direction of inclination in the center of the roll barrel (5) are provided. 18. Device according to one of claims 7 to 17, characterized in that with crossed or axially parallel cylindrical rollers (1,2) with the same or different roller PATENT ADVOCATE DR. STARK · MOERSER STR. 140 ■ D-4150 KREFELD · <®> (021C1) 23222 j. 20469 x [g] 853578 bale diameters or conical rollers with equal or unequal diameters in the roll barrel center or rolls whose general contours follow other suitable mathematical functions, smooth roll balls or roller balls with circumferential beads (4) and / or indentations (5) are provided are. 19. Device according to one of claims 7 to 18, characterized in that for receiving of axial forces on the side opposite the drive of the rollers (1,2), the Operating side of the roll stand, with axial bearings (14) and locking devices equipped bearing components (8,9) are provided. 20. Device according to one of claims 7 to 18, characterized in that at one Four-high mill stand the axial forces via the associated back-up roll (1 ^ 2) and its axial bearings (14) into a support bar (15s) and from there can be transferred to a transverse frame. 21. The device according to claim 20, characterized in that that the cross frame cross arms (18 1, 18 r), which in the area of the axial forces occurring at the level of the work roll axes or the back-up roller axles integrated into the two roller stands (17 1, 17 r) and are connected to one another in the middle of the roll stand. 22. Device according to claims 7 to 20, PATENT ADVOCATE DR. STARK · MOERSER STR. 140 · D-4150 KP ₁ EFEIX ■ "^" (02151) 28222 and 2C469 ■ Qx] 853578 characterized in that in conventional Roll stands for the purpose of receiving the axiajen Forces in the amount of the work roll axes or the backup roll axes on the one and the Exit side of the roll stand separate, attached to the roll stands (17 1, 17 r) Cross frames are arranged. 23. Device according to one of claims 7 to 21, characterized in that the one Roll (1) from the drive side, the other roll (2) from the operator side of the roll stand driven and the associated axial force on the opposite of the drive Side is received in axial bearings (H).