JPH01133604A - Multi-division rolling roll having drivable support shaft and roll ring mountable on said shaft - Google Patents

Abstract

PURPOSE: To remarkably improve fatigue strength of a roll ring by specifying the number and inclination of ring surfaces for mounting of multi-partitioned rolling roll having a roll ring and a drivable supporting shaft, distance between the ring surface for mounting and a central shaft line and contact pressure applied to the ring surface. CONSTITUTION: A multi-partitioned rolling roll is composed of drivable supporting shafts and a roll ring 10 which can be attached to it, and the supporting shafts, on their end faces facing each other, are individually provided with ring flange members 1, 2 which can be in contact with the supporting shafts and one of the two end faces of a roll ring 10 and a tightening device 14a which can be connected with one of the ring flange members 1, 2 and passes through the center of the other ring flange member. The fatigue strength of the roll ring is improved by selecting the numbers and inclination of a ring surface 1 g for mounting, distance between the ring surface for mounting and a central shaft line and contact pressure at specified values so that, depending on the constitution of a roll concerning the size, caliber and material of the roll, bending and tensile stress produced on the peripheral area of the roll during roll operation are reduced by contact pressure applied to the ring surface 1 g for mounting from the tightening device.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a multi-segment rolling roll having a drivable support shaft and a roll ring attachable to the support shaft,
The supporting shaft includes two ring flange members which can each coaxially abut one of the two end faces of the roll ring by means of their mutually opposing end faces, and which can be coupled to one ring flange member and which can be connected to the other ring with play in the radial direction. an axial tightening device guided through the center of the flange member and acting on the ring flange member on the side opposite the roll ring, the end face of the ring flange member on the side opposite the roll ring; has a mounting annular surface that can be placed on a corresponding opposing surface of the end surface of the roll ring, and the end surface of the ring flange member has an inclination angle with respect to the radial direction of the center axis from the center axis to the outer edge. The present invention relates to a multi-segment roll having two or more different mounting annular surfaces.

[Conventional technology]

Various configurations of this type of multi-segment rolling roll are known (German Patent Publication No. 1140535 and German Patent Publication No. 1146467, German Patent Publication No. 160208).
6, DR-B-132726, European Patent Publication No. 214521, etc.). In the configuration of these known multi-segment rolling rolls, the tightening device comprises a connecting rod which connects both ring flange members to each other in an axially movable manner, and a hydraulic nut provided on this connecting rod and supportable by the ring flange members. It has The connecting rod is inserted into and screwed into one ring flange member and guided through a central hole in the other ring flange member. A hydraulic nut is attached to the free end of this connecting rod. Multi-segment rolling rolls of this type are used, for example, in roll stands with a pair of carrier shafts supported on two parallel roll supports and connectable on one side to a drive element, for example a carrier shaft carrying a roll ring. According to the first two publications mentioned at the beginning, the ring flange member on the drive side and the roll ring have a ring flange member and a roll ring on their mutually opposing end faces as driving elements for transmitting torque from this ring flange member to the roll ring. It has a stepped portion or a recessed portion of the spur gear coupling portion that engages with play in the axial direction. Centering of the roll ring with respect to the center axis of the roll configured in this manner is effected by a cylindrical edge protrusion provided on the edge of the outer ring of the ring flange member. This edge projection surrounds corresponding ring flanges provided on both end faces of the roll ring.

The multi-segment rolling roll known from DE 1602086 and EP 214 512 has an annular mounting surface provided on the end face of the ring flange member and inclined with respect to the radial direction of the central axis. The centering of the roll ring is performed using This annular mounting surface can be placed on correspondingly inclined mounting annular surfaces provided on both end surfaces of the roll ring. The slopes may point inward or outward at different slope angles.

[Problem to be solved by the invention]

The present invention is based on the recognition stated in the above-mentioned DR-PS No. 132726, that is, it is not only possible to increase the permissible rolling pressure of the roll by the axial pressure acting on the roll ring, but also that the permissible rolling pressure of the roll can be increased. Based on the premise that it is possible to increase the fatigue strength of the material, the objective was to improve the known multi-segment rolling roll as follows, namely, by applying axial pressure to a specific region of the roll ring. The object of the present invention is to improve the fatigue strength of the roll ring by adapting it to the various shapes of the roll ring and the materials used therein.

[Structure and effects of the invention]

In order to solve the above-mentioned problems, the present invention aims to improve the roll size,
Depending on the configuration of the roll in terms of caliber and material, the mounting device is designed such that the bending and tensile stresses that occur during roll operation, particularly in the outer circumferential region of the roll, are reduced by the contact pressure exerted by the clamping device on the mounting annular surface. It is characterized in that the number and inclination angle of the annular surfaces, the distance between the annular surface for placement and the central axis, and the contact pressure are selected.

It is expedient for the annular support surface to be guided up to the outer annular edge of the ring flange element, the angle of inclination of the annular support surface extending slightly inwardly.

By setting the compressive stress to a selected level in different regions of the roll ring body, for example, in the area of the outer circumferential surface of the roll ring, bending and tensile stress caused by deflection of the roll due to rolling force during roll operation can be considerably reduced. The bending and tensile stresses can be reduced, at least in part, so that cracks do not grow in the joints of the roll rings due to the inevitable thermoshocks during rolling, or they grow very slowly. Can be done. In actual operation, we found that the roll pass time can be increased depending on the roll size, number of calibers, and material.
We were able to reduce the degree of twisting by half.

The placement of the mounting annular surface with a relatively large angle of inclination close to the axis allows for accurate centering of the roll ring and, in conjunction with the elimination of compressive stress, facilitates the removal of the ring flange member from the roll ring. Can be done.

For multi-segment rolling rolls whose roll rings are not replaced or are replaced only at considerable time intervals, the inclination angle is approximately O.
An annular mounting surface of o, ie an annular mounting surface arranged approximately concentrically and close to the axis, is also suitable. In this case, it is difficult to remove the ring flange member from the roll ring.

According to an advantageous embodiment of the invention, when the annular edge of the ring flange member acts on the end face of the roll ring during tightening, the annular support surface lies in the radial plane of the axis of rotation or the angle of inclination of the annular surface of the device and the outer annular edges of both ring flange members to such an extent that said annular edges are pushed outwardly away from each other within an elastic range such that the annular edges lie in a plane extending slightly obliquely relative to the plane; The axial thickness is selected. This not only allows the tightening force to be conveniently transmitted to the outer peripheral surface of the roll ring body, but also prevents the upper and lower mounting annular surfaces from separating when the roll ring is more or less deflected. be done.

The larger inclination angle of the annular mounting surface is selected to be such that the annular mounting surface comes into contact with the inclined end surface portion of the roll ring within the range of axial movement of the ring flange member. , at this angle of inclination, the annular mounting surface of the ring flange member is pushed outward within its elastic range. This eliminates the difficulty of precise axial positioning associated with conical retaining surfaces. This means that when the mounting annular surface and the end surface of the roll ring are located above and below, the ring flange member can move axially, even if slightly, and therefore the above surfaces simultaneously This is because it comes into contact with a surface portion close to the axis that extends in a conical shape at an inclined angle.

In multi-segment rolling rolls, it has already been disclosed in DE 11 40 535 and DE 1 146 467 to additionally provide a driving connection between the ring flange member and the roll ring for structural and operational reasons.
According to another advantageous embodiment of the invention, as is known from EP 2 145 21 A, the entraining element is arranged on the outside of the bearing surface and the opposing surface of the ring flange member and the roll ring, and is preferably located between the central axis of the roll and the inner ring interface of the roll ring.

According to another advantageous embodiment of the invention, a driving sleeve is provided which can be inserted between the opposite end faces of the ring flange part and which can be attached to the connecting rod and has a driving pawl on its end side. . This entraining sleeve serves as a entraining element that only transmits torque between the two ring flange parts. The components of the entrainment connection configured in this way include mutually opposing end surfaces of the ring flange member,
It is expedient to provide it on the annular end face of the entraining sleeve facing the ring flange part. The entrainment connection is therefore automatically released upon removal, ie upon removal from the roll ring. A suppression sleeve can also be provided which can be inserted between the outwardly directed end face of the ring flange element and the axial clamping device. This makes it possible to adapt the axial spacing of the mutually opposing end faces of the ring flange elements to the axial thickness of the roll ring used in each case. On the other hand, it is of course also possible to provide the components of the entraining connection on mutually opposite end faces of the ring flange part.

By configuring the entrainment connection as described above, the following special advantages are also obtained. In other words, torque transmission from the ring flange member to the roll ring is reduced due to insufficient compressive stress or because the contact surface between the roll ring and the ring flange member contains oil-containing regraphite. damage, resulting in relative movement between the abutting surfaces,
As a result, the roll may break, but even in such a case both ring flange members remain rotationally connected to each other. Furthermore, the pressures acting on the abutment surfaces are always symmetrical, unlike in the known entrainment connection mentioned at the outset.

According to another advantageous embodiment of the invention, adaptation to different roll rings can be inserted on both sides of the roll ring between the end faces of the roll ring and the mutually opposite end faces of the ring flange members. An intermediate ring is provided, which can rest on the roll ring and on the respective ring flange member on its end side, in which case the contact cross section of the ring flange member with respect to the end face of the intermediate ring is such that the contact cross section of the ring flange member with respect to the end face of the roll ring is It is also obtained by being equal to the abutment cross section of the intermediate ring. With this configuration, when the roll is used in a roll support with a relatively short bearing interval, the roll ring can be directly biased by the end face of the ring flange member without using an intermediate ring.

According to another advantageous embodiment of the invention, the rolling roll is formed in a multi-part rolling roll having threaded nuts that can be fixed at both ends of the connecting rod and a support ring that can be mounted on the ring journal of the ring flange member. The diameter of the ring journal is selected in such a way that the support ring is fixed in position in the axial direction by the enlargement of the diameter of the ring journal caused by the tightening of the supporting elements. This is advantageous since during the rolling process the bearing must be connected in a rotationally fixed manner with the carrier shaft.

Finally, according to another advantageous embodiment of the invention, the thread of the connecting rod receiving the threaded nut is designed as a conical thread, so that the tensile force of the thread can be increased. This improves the load distribution.

〔Example〕

Next, embodiments of the present invention will be described using the accompanying drawings.

The rolling roll shown in FIG. 1 consists of two ring flange members 1 and 2. The rolling roll shown in FIG. The ring flange members 1 and 2 are supported by a roller bearing 3 by a ring journal 1a or 2a. The roller bearing 3 is mounted on a roll chock 6 of a roll stand (not shown). A connecting rod 7 provided with a screw 7a is screwed into the ring flange member 2. The connecting rod 7 is guided through a through hole 1b provided in the ring flange member 1, and is screwed at its free end 7b to a nut 14a via another screw 7C. A sleeve 8 is attached to the journal end 1k. This sleeve 8 has a feature not shown in the drawings.
It is used as a drive transmission element for the rolls of a roll stand installed on a parallel rolling line. A drive sleeve 9 is attached to the journal end 2b of the ring flange member 2. A roll ring 10 is provided between mutually opposing end surfaces 1d and 2d of the ring flange members 1 and 2. In the illustrated example, the roll ring 10 has an irregularly shaped groove 1.
0a, and abuts against the correspondingly extending abutting annular surfaces 1e and 2e of the ring flange 1 or 2 by means of the abutting annular surfaces 10b and loc extending in the plane in the radial direction of the rotating shaft. There is. In approximately the central region of the circumferential surface of the connecting rod 7, on the mutually opposing end surfaces 1c and 2d, there are provided entraining pawls 12 of both ring flange members 1 and 2, which are movable in the axial direction into each other. There is. The rolling roll formed by the nut 14a, the connecting rod 7, the two ring flange elements 1.2 and the roll ring 10 fixed therebetween can be used in the same operating mode as a one-piece roll.

The rolling roll shown in FIG. 2 corresponds to the rolling roll shown in FIG. 1 in terms of its basic configuration, but the ring flange member 112 has an end surface 112d on the side of the ring flange member 111.
It differs in that it has a sleeve-like extension 112e concentrically.

This extension 112e makes the width of the roll ring 110 very wide as shown below the central axis, or the width of the ring flange member 11 as shown above the central axis.
End surfaces 111C and 112 facing each other of 1 and 112
d makes it possible to provide two intermediate rings 13 and 14. The intermediate rings 13 and 14 act on the outer surface of the narrow roll ring 110'. The contact cross-section of the ring flange members 11 and 12 with respect to the intermediate ring 13 or 14 is similar to that of this intermediate ring 1 with respect to the roll ring 110'.
Equal to the abutment cross section of 3.14. The connecting rod 7 has a threaded nut 14 on the thread 7C of its end 7b. This screw nut 14 is supported on an outwardly facing end surface 112f of the ring flange member 112. In the illustrated example, the screw nut 14 is covered by a cover 18 that is fixed to the end surface 112f with a screw. A rolling roll constructed in this way makes it possible to use roll rings 110, 110' of different thickness without changing the basic elements.

The construction of the rolling rolls illustrated in FIG. 3 partly corresponds to the construction of the rolling rolls of FIG. 1 and partly of the construction of the rolling rolls of FIG. 2. 212 f of end faces directed to the outside of the ring flange member 212 above the central axis
A suppression sleeve 20 is attached to the connecting rod 7 between the ring flange 12 (which, as in the case of the ring flange 12 in FIG. 1, does not have the extension 112e as in the configuration shown in FIG. 2) and the screw nut 14. There is. One annular end surface 2 of the suppression sleeve 20
0b is in contact with the pressing nut 14, and the other annular end surface 20a is the end surface 2 directed toward the outside of the ring flange member 212.
12f, and thus the roll ring 210' is connected to the mutually opposing end surfaces 212 of the ring flange members 212 and 211.
It becomes possible to tighten between d and 211C. Torque transmission is performed by the driving pawl 12 in the same manner as in the configuration shown in FIG. In the configuration illustrated below the central axis, the end surface 211c facing inward of the ring flange member 211
The entraining sleeve 22 is interposed between and 212d.

The connecting rod 7 is guided through this entraining sleeve 22. The entraining sleeve 22 has the entraining claws 12 on both end faces thereof, and the length thereof is as follows.

The roll ring 210 is attached to both ring flange members 211 and 2.
The selection is made so that no axial stress is generated on the entraining pawl 12 when it is tightened between 12 and 12. By configuring the rolling rolls in this way, it is possible to use roll rings 210, 210' of different thicknesses and only entraining sleeves 22 or suppressing sleeves 20 of different lengths.

In the configuration shown in FIG. 4, the ring flange member 311
312 and roll ring 312 are secured by a connecting rod 307 carrying a threaded nut 314 at each end. With this configuration, the ring flange member 311, which is generated by tensioning the connecting rod 307,
The diameter can be selected in such a way that the support ring 23 is fixed in position in the axial direction by increasing the diameter of the two ring journals 311a or 312a of 312 to the diameter D'.

In the case of the rolling roll shown in FIG. 5, the roll ring 410 fixed by the connecting rod 507 between the ring flange members 511 and 512 has a large number of irregularly shaped grooves 410a, unlike the previous embodiments. . As in the previous embodiments, such multi-segment rolling rolls are also handled and operated in the same manner as integral rolls.

In the ring flange member 1 shown in FIG. 6, the side surface can have an abutment annular surface 1g lying in a radial plane and an abutment surface 1f extending obliquely.

Instead of the annular abutment surface of FIG. 1, an annular abutment surface 1e with an angle of inclination of 90 DEG is also possible. In the case of this abutting annular surface, it is necessary to shrink-fit the ring flange member.

FIG. 7 shows the abutment annular surface 1g'' guided to the outer annular edge 1a of the ring flange member 1.The inclination of the abutment annular surface 1g1 with respect to the radial plane E is a slight inward This inclination angle α and the axial thickness S of the annular edge 1h of the ring flange member 1 are selected as follows.That is, in the operating state of the rolling roll, the abutting annular The annular edge 1h has an end surface (not shown) which receives the action of the roll ring when the multi-segment rolling roll is tensioned so that the surface 1g+ lies within the radial plane E or is located at a certain angle with respect to this surface. ) is selected so that it is pushed outward to the position shown by the dashed line.

Next, embodiments of the present invention will be listed.

(1) The annular surface for mounting (Ig') is connected to the ring flange member (
2. The multi-segment rolling roll according to claim 1, characterized in that it is guided up to the outer annular edge (1h) of 1).

(2) The multi-segment rolling roll according to item 1 above, wherein the inclination angle (α) of the mounting annular surface (Ig') extends slightly inwardly.

(3) When the annular edge (1h) of the ring flange members (1, 2) acts on the end face of the roll ring (10) during tightening, the annular mounting surface (1g') is aligned with the surface in the radial direction of the rotating shaft. (E) or within a plane extending slightly inclined with respect to this plane, the mounting annular shape is such that the annular shapes a(lh) are pushed outward from each other within an elastic range. The inclination angle (α) of the surface (Ig') and the axial thickness (S
) The multi-segment rolling roll according to item 2 above.

(4) The size is such that the mounting annular surface (1f) comes into contact with the inclined end surface portion of the roll ring (10) within the range of axial movement of the ring flange members (1, 2). A larger inclination angle of the annular mounting surface (1f) is selected, ensuring that with this inclination angle the annular mounting surface (1g) of the ring flange member (1, 2) is pushed outward within its elastic range. Any one of the above items 1 to 3, characterized by
The multi-segment rolling roll described in .

(5) The entraining connection part is displaceable into the connection position by an axial movement, and the entraining connection part has connection elements on mutually opposite end faces of the ring flange member.
In the multi-segment rolling roll described in items 1 to 4 above, the entraining element is arranged outside the mounting surface and opposing surface of the ring flange members (1, 2) and the roll ring (10). A multi-segment rolling roll featuring:

(6) characterized in that the entraining element of the entraining connection (12) is arranged between the central axis of the roll and the inner ring interface of the roll ring (10); Multi-segment rolling roll.

(7) A driving sleeve (22) equipped with a driving claw (12) on the end surface, which can be inserted between the mutually opposing end surfaces of the ring flange members (211, 212) and can be attached to the connecting rod (7). The multi-segment rolling roll according to claim 1 or any one of the above-mentioned items 1 to 6, characterized in that it has a.

(8) The end face (212f) facing the outside of the ring flange member (212) and the axial tightening device I (14
8. Multi-segment rolling roll according to claim 1 or any one of the preceding claims, characterized in that it has a compression sleeve (20) which can be inserted between ).

(9) On both sides of the roll ring (110'), the end face of the roll ring and the ring flange members (111, 112)
), the intermediate ring (30, 31 or 13.) can be inserted between the opposing end faces (llc, 112d) of
14), and the intermediate ring has a roll ring (110') and each ring flange member (111, 112) on the end side.
2. The multi-segment rolling roll according to claim 1, wherein the multi-segment rolling roll according to claim 1 or 2, is capable of abutting against the roller.

(10) The contact cross section of the ring flange member (LLLC, 112d) with the end surface of the intermediate ring (13, 14F) is the contact cross section of the intermediate ring (13, 14) with the end surface of the roll ring (110'). The multi-segment rolling roll according to item 9 above, characterized in that the surface is equal to the surface.

(11) Claim 1 or any one of the above clauses 1 to 10, comprising a screw nut that can be fixed to both ends of the connecting rod and a support ring that can be attached to the ring journal of the ring flange member. In the described multi-segment rolling roll, the elements forming the rolling roll (314°30
7. The ring journals (311a, 312a) are tightened so that the support ring (23) is fixed in position in the axial direction due to the enlargement (D') of the diameter of the ring journal (311a, 312a) caused by the tightening of the ring journals (311, 312, 310).
) A multi-segment rolling roll characterized in that the diameter (D) is selected.

(12) Claim 1 or any one of the above clauses 1 to 11, comprising a screw nut fixable to both ends of the connecting rod and a support ring attachable to the ring journal of the ring flange member. In the multi-segment rolling roll described.

Multi-part rolling roll, characterized in that the thread (7c) for receiving the threaded nut (10) is designed as a conical thread.

[Brief explanation of the drawing]

FIG. 1 is an axial sectional view of a rolling roll according to the present invention. FIG. 2 is a partial axial sectional view of another embodiment of the rolling roll according to the invention, FIG. 3 is a partial axial sectional view of two other embodiments of the rolling roll according to the invention, and FIG. 4 is a rolling sectional view of another embodiment of the rolling roll according to the invention. FIG. 6 is an axial cross-sectional view of another embodiment of the roll. FIG. 5 is an axial sectional view of another embodiment of the rolling roll according to the invention, FIG. 6 is a partially enlarged view of the rolling roll according to the invention, and FIG. 7 is an enlarged view of other parts of the rolling roll according to the invention. be. 1.2; 111, 112; 211, 212...
Ring flange member 10; 110, 110': 210, 210'...
...Roll ring

Claims (1)

[Claims] (1) A multi-segment rolling roll having a drivable support shaft and a roll ring attachable to the support shaft, wherein the support shaft is coaxially attached to one of the two end faces of the roll ring by means of mutually opposing end faces. two abutable ring flange members, connectable to one ring flange member and guided through the center of the other ring flange member with play in the radial direction; an axial tightening device that acts on the flange member; In a multi-segment rolling roll, the end face of the ring flange member has two or more mounting annular surfaces having different inclination angles with respect to the radial direction of the central axis from the central axis to the outer edge, roll size,
Depending on the configuration of the roll in terms of caliber and material, the bending and tensile stresses occurring during roll operation, especially in the outer circumferential area of the roll, are transferred from the clamping device (14a) to the annular mounting surface (
the quantity and inclination angle of the mounting annular surface (1f, 1g) so as to be reduced by the contact pressure acting on the mounting annular surface (1f, 1g);
A multi-segment rolling roll characterized in that the distance between the mounting annular surface (1f, 1g) and the central axis and the contact pressure are selected.