DE1908942A1 - Fastening a roller ring on a shaft with the associated tool kit - Google Patents

Description

Niederrheinische Hütte AG.

Duisburg February 19, 1969

69/2901 Kn / How

Fastening a roller ring on a shaft with • the associated tool set.

The invention is concerned with the fastening of a rolling ring on a shaft by means of a clamping connection, in which the Rolling ring with the interposition of an internally and / or externally conical sleeve with axial preload on the shaft and is secured by a screw, as well as with the associated tool kit.

Rolling rings clamped on shafts, which are mostly made of hard metal or tempered steel, if necessary with hard metal coating, are used especially in the frames of wire rod mills. Fast-running wire rod mill in the finishing blocks the roller rings are preferably overhung on the ends of the roller shafts.

In a known wire mill, roller rings are clamped onto the conical shaft journal by means of slotted, internally conical clamping sleeves. To enable the rolling rings to be changed * is the cone on the shaft journal is not self-locking. The torque is transferred from the roller ring to the shaft by means of a cross bar transfer. The roll ring is clamped by widening the slotted, internally conical clamping sleeve axial sliding of the clamping sleeve onto the conical seat of the roller shaft by means of a nut via a center screw the face of the shaft.

It turns out that this type of roll ring fastening was completely inadequate in operation; because loosened during the rolling operation .secure the clamping. That caused damage to the conical

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Sitting by the waves. The slots in the adapter sleeves are clearly pressed into the shaft ends. This made exact centering impossible in the long run. It was also found that there were accumulations of material in the direction of the roller housing on the cones of the roller shaft. This error is also due to the loose fit. As the condition of the shaft journals got worse and worse, it became more and more difficult to adhere to tolerances during rolling. In addition, a lot of rolling ring fractures auf.-they came reasons for this are to be found partly in the loosened seat of roll rings and partly in the notch tensions generated by the torque transmission via a crossbar in the rolling ring v / ground and cause cracks due to the brittleness of w material .

It is already known in mechanical engineering, discs or other Machine parts with the help of unslotted, self-locking To fasten clamping sleeves on shafts. However, unslit sleeves are used far less often than slotted ones Pods. The main reason for this is that the plague is spreading and in particular the loosening of connections with unslit sleeves is much more difficult than when using slotted sleeves. There are also known, for example, rolls for rolling mills in which the roll barrel on both Sides centered and clamped with the help of conical adapter sleeves on a continuous shaft supported on both sides is. The required axial preload is generated with the aid of a nut screwed onto the shaft. Additionally be Thermal stresses applied, under the influence of which the shaft with the sleeves is shrunk into the roll barrel. With such rollers an extremely tight fit is achieved. The rollers normally need during their life not to be loosened before the wave. But if for once a loosening is necessary, this is done in cumbersome workshop work, with damage to the individual parts can hardly be avoided. With the rollers with which the

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Invention concerned, however, is a frequent change of caliber about at intervals of several hours or at most a few days required, whereby each time the roller rings must be loosened from the shafts. So it is of vital importance that the vial ring change in a very short time, for example in a few minutes, can be done on the spot.

The object of the invention is to provide a fastening of the type mentioned at the beginning with an associated tool kit create in which the disadvantages of the known wire mill described above are avoided. The attachment should therefore both a firm and precisely centered seat of the Walzrir.ges ensure, as well as enable a roll ring change in a short time.

This task> / ird according to the invention when attaching a Walsringes, in particular a hard metal roller ring, on a shaft, in particular on a flying shaft end in the Finishing block of a wire rolling mill by means of a clamping connection, in which the rolling ring with the interposition of an ir.rer and / or outside conical sleeve with axial * or tension iuf de; :: Wellener.de clamped and secured with a screw ict, solved in that the sleeve is unslotted and its cone: inkel is in the area of self-locking and that one out of the Rolled laterally protruding part of the sleeve holding means for piecing, corresponding organs one on the shaft or above: Has nf-supportable pulling tools.

In a particularly simple embodiment of the invention A coaxial internal thread is provided in the sleeve, in read one screw of the pulling tool that can be supported on the face of the shaft intervenes. This screw is advantageously designed as a hollow screw, through the hole in a thread at the end of the screw that engages at the end of the shaft is inserted. As is known per se, this last screw serves as a tensioning screw to the. Tighten the connection and stay to secure; also attracted v.'vihreni.! es company.

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In a slightly modified embodiment, the sleeve an external thread on which a nut that can be supported on the end face of the roller ring sits as a pulling tool.

In the embodiments described so far, which are characterized by particular simplicity, the difficulty may arise that in order to achieve the axial pressing forces wrenches of considerable length are required, their handling is not always possible due to lack of space. For these cases, the invention proposes that on the sleeve a part of a consisting of cylinder and piston part and serving as a pulling hydraulic press can be attached, while the other Part can be supported on the end face of the shaft end or the roller ring. In a preferred embodiment of the invention most of the end of the sleeve claws, which with corresponding claws of the cylinder part in the manner of a bayonet lock are lockable, and also the piston part is designed to be supported on the end face of the shaft end. In another embodiment, the end of the sleeve also has claws that correspond to the claws of the cylinder part are lockable in the manner of a bayonet catch, but the piston part is annular and on the end face of the roller ring can be supported. In this embodiment, the sleeve is still releasable when the roller ring is not attached to the shaft end, but at any point on the shaft. All that needs to be done is the clear opening of the ring-shaped Part of the piston must be larger than the shaft diameter so that it can be pushed onto the shaft.

Another embodiment of the invention provides that the end of the sleeve has claws with corresponding claws an annular cylinder part can be locked in the manner of a bayonet lock and that the piston part with clamping screws is fixed on the shaft end. With this cylinder and piston part acting as a hydraulic press, the sleeve can be clamped in a simple manner. The end of the sleeve is expedient in operation by means of a clamping screw

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Covered securing cap tightened on the shaft end, which is supported on the sleeve end or on the roller ring. At a In a preferred embodiment, the contact surfaces of the roller ring and the safety cap have a friction-increasing surface treatment Experienced. In order to save on roll rings, it is recommended according to the invention to make the sleeve cylindrical on the outside and to provide the rolling ring with two symmetrically arranged gauges. If one of the two calibers is due to wear has become unusable, the roller ring can be turned so that from now on the second caliber is used.

In the following the invention is based on an exemplary embodiment Illustrative drawing explained in more detail. Show in detail

1 shows a fastening of a roller ring in longitudinal section,

Fig. 2 shows another fastening of a rolling ring in the operating state and. in longitudinal section,

3 shows the fastening of a roller ring according to FIG. 2 without Safety cap viewed in the direction of the axis,

FIG. 4 shows the fastening of a roller ring according to FIG. 2 with a jig attached in a longitudinal section,

FIG. 5 shows the fastening of a roller ring according to FIG. 2 with an extractor tool attached in a longitudinal section,

Fig. Ο Another fastening of a roller ring in the operating state and in longitudinal section and

7 shows the fastening of a roller ring according to FIG. Β with another pulling tool in a longitudinal section. -

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According to Pig. 1, a roller ring 2 is fixedly mounted on the flying end of the shaft 3 by means of a sleeve 1. The shaft 3 has a recess k in connection with its cylindrical part, in which a sliding ring 5 is located, which serves to seal the roll housing, not shown, against penetration of water. The recess 4 is followed by a conical part 6, the cone angle O (of which is in the range of the self-locking. The angle is about 2.5 °. Behind the conical part 6 there is another cylindrical part 7 at the end of the shaft. Corresponding to the shaft sections 6 and 7, the inside of the sleeve 1 also has a conical part and a cylindrical part. Outside, the sleeve 1 is cylindrical as far as it is inserted in the bore of the roller ring 2. The bore of the roller ring 2 is accordingly also cylindrical Hard metal and is provided with a caliber S. The sleeve 1 is provided with a bottom part 9 which has a concentric threaded hole into which the screw 10 is screwed. The screw 10 is a hollow screw 11 freely pushed through, which engages in a threaded hole in the shaft end. The shoulder of the hexagonal head of the screw 11 is supported on the screw 10.

The clamping of the roller ring 2 on the shaft end takes place in such a way that the roller ring 2 initially together with the sleeve is pushed until it rests against the sliding ring 5. The screw 10 is unscrewed so far that between its end face 10a and the end face of the shaft 3 there is a gap. Then the screw 11 is in the thread of the shaft end screwed in. The screw 10 is locked in place. As soon as the shoulder of the hexagon head of the screw 11 comes into contact with the screw 10, the further screwing in of the screw 11 'causes the sleeve 1 to be pulled on its conical seat. At the same time, the relatively thin-walled sleeve 1 - its wall thickness in the area of the conical part is on average approximately 1/20 of the diameter - expanded above the cone 6. It is pressed against the roller ring 2 from the inside. Requirement is of course, that the sleeve 1 with a close tolerance in the rolling ring

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is fitted. An axial preload builds up in the screw 11. The torque to which the screw 11 must be screwed, is dependent on the .-. ". It the shaft 3 ^to transfer torque from the allowable compressive stress a> f 'sleeve 1 and the shaft 3 and on the fatigue fracture strength of the rolling ring 2 The screw 11 remains tightened in the operating state.

To loosen the sleeve and the roller ring, the following is done. :

First the screw 11 is loosened. Remains in this state the Y salt ring 2 as a result of the self-locking effect of the press fit clamped. Now screw K will rush deeper into that Thread ei: i: you go. When their front side 10a on the front side des Weller.enics causes the Screw 10 'as pulling out the sleeve 1. This creates the press fit of the whale :: ring 2 solved in a simple way.

The exemplary embodiment according to FIGS. 2 and 3 agrees with the fastening of the whale ring 2 by means of a conical sleeve I ¹ essentially with de: r. The embodiment according to FIG. 1 is the same. In the /.usführun'csceispiel 2 gemllß ice ^Figs. But the laterally herausragencc from the V.'alzrii.g 2 part of the sleeve l 'is formed differently. The pod l 'has first of all eir.e! • zra.Tonartiee Verdic'.oinr. 12: r, it a r application - ". ^{Cante 1?. Au 0} , .which is followed by an annular groove 1 ^ t. The edge of the sleeve 1 'forms a r'.ranc of claws 1-. In the operating state is ge. -wet: ^r i.:. 2 a cap Ic is placed on the end of the vial, the ": it Tm.er. hexagon head screws 1? ar. the:; V.'ellenende tightened Iso. The cap Ic covers with its edge part the end of the sleeve I ^1. Sl- sruu: ζ on the sleeve 1 'and thereby secures it in the sputtered state. In addition, it protects the end of the sleeve 1' 1 'before damage ::. A bolt 1 ^, cer in a: i: La "v: ralc Aus.ieliriung the V.'elle 5 is inserted, the sleeve 1'Q-" rc ::: iri :: = ; ·: -.U: i. :: it its Eni.er. ir. recesses of the V; alzri :: ges ie: .v primarily as "'.Titagehilfe, ir ..- crr. er

i :: rr.f: t.

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prevents the rolling ring 2 and the sleeve l ^f falling out during assembly. The ends 19 of the bolt are designed so that, as shown in FIG. 3, they have no contact with the side surfaces of the recess of the roller ring. The bolt cannot transmit any torque during operation. It is secured with a central screw 20.

When the roller ring is clamped, the roller ring 2 with the sleeve 1 is pushed on again first. Then, according to Pig. 4 a jig placed on the sleeve end, which consists of a hydraulic press. Si-j has a cylinder part 21 and a piston part 22. The cylinder part 21 fc has the shape of a ring, on the inside of which a ring of claws 25 is attached, which cooperate with the claws 15 of the sleeve 1 'in the manner of a bayonet lock. The piston part 22 is in the form of a cap and is tightened to the shaft end with screws 2k. Pressure fluid, for example with a hand pump, is introduced into the annular cylinder space through a nozzle 25. The claws 25 are supported on the collar 12. The sleeve 1 'is thereby driven deeper into the annular gap, whereby the roller ring is tightened. The contact pressure is, for example, about 15 t.

According to FIG. 5, the pulling mechanism is also a hydraulic one Press with a. annular cylinder part 26 and a ring P piston 27. The cylinder part 2o has a ring of claws 23, which are again formed in accordance with the claws 15. When introducing hydraulic fluid into the nozzle 29 on the one hand the annular piston 27 is supported on the roller ring 2, while on the other hand the Zyliridteil 26 by means of the claws 15 and 28 exerts a tensile force on the sleeve end with which the Sleeve 1 is pulled out. The forces acting on the sleeve 1 are symmetrical both during clamping and removal distributed over the circumference, so that skewing is excluded.

The embodiment of Fig. 5 differs from the embodiment shown in Fig. 2 essentially in that

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that the roller ring 2 'here has two symmetrically arranged calibers 8 and 8 ^f . Initially, only the 8 gauge is in engagement with the rolling stock. If this has become unusable due to wear, the roller ring 2 ^{f can be} turned over, so that from now on the caliber 8 'is used. Such an arrangement was not only impossible for structural reasons, but also made little sense in the case of the rolls that were stored in the usual manner, since the life of the roll rings normally ended not through wear of the caliber but rather through roll breakage. A prerequisite for such a design of the roller ring is of course that the sleeve 1 'is cylindrical on the outside and the bore of the roller ring 2' is also cylindrical.

In addition, in this exemplary embodiment, the cap ΐβ ^1, in contrast to the exemplary embodiment in FIGS. 2-5, has a widened edge part which is supported with its end face on the roller ring 2 '. When the screws 17 * are appropriately pretensioned, a strong frictional connection is created at the drilling point, which can be further improved by a friction-increasing surface treatment, for example an etching or mechanical roughening of the contact surfaces of the roller ring 2 ^{1 and the cap Io '.} The frictional engagement in the contact area between cap 16 'and roller ring 2' contributes significantly to the transmission of the torque. Because of this additional frictional connection, it is possible ^{to keep the surface pressure between the sleeve I 1} and the roller ring 2 'relatively low. As a result, the required tensile stress in the circumferential direction of the roll ring 2 'is reduced and the risk of roll breakage is reduced. Further causes the applied 'to the rolling ring 2' axial compressive stress of the cap l6 that are taken by rolling on the lateral regions of the caliber 8, forces exerted 8 ^T harmless. In the case of roll rings of this type, but which are spanned in a different way, these forces have often caused the roll ring to split in the plane of the bottom of the pass.

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In this embodiment, in contrast to the embodiment of FIGS. 2-5, the roller ring 2 'has no recesses for the bolt l8 ^f . This rests on the end face of the roller ring 2 'and is correspondingly flatter than in the embodiment shown in FIG. 2. Its two ends engage in corresponding recesses on the edge of the cap 16 '. That of the roller ring 2 'by frictional engagement on the cap l6 ^! The torque transmitted is thus passed into the shaft 3 via the bolt l8 'by the shortest route. As a result, the screws 17 '*, which are also suitable for transmitting the torque due to their eccentric arrangement, are partially relieved. Of course, the bolt 18 'also serves as an assembly aid in this embodiment.

From Fig. 7, a further embodiment is one as a pulling tool hydraulic press. The piston part 30 is a solid rotating part with a projection 31, the Diameter is not significantly larger than that of the cylindrical part 7 at the end of the shaft 3 · The approach Jl can therefore insert into the protruding part of the sleeve 1 '. It is placed on the face of shaft 3. The cylinder part 32 has the shape of a pot, on the edge of which a collar 33 is attached is the one with a wreath of inwardly reaching claws 3 ^ is provided. These interact with the claws 15 of the sleeve 1 'in the manner of a bayonet lock. The introduction of hydraulic fluid into the connection 29 * causes the sleeve 1 'to be pulled out will.

Even if the embodiments shown are particularly advantageous Application examples of the invention are, the invention is not limited to these examples. According to the In accordance with the invention, it is also possible to fasten a roller ring on a cylindrical shaft end. In this case the sleeve is cylindrical inside and conical outside; accordingly, the bore of the roller ring is also conical. It is also possible, with the appropriate Formation of the shaft end and the roller ring to use an inside and outside conical sleeve. Furthermore can

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With the fastening according to the invention, clamp a roller ring not only at the end but at any point on a shaft, with the tools being able to be adapted to the geometric conditions in a simple manner.

With the aid of the invention, it is possible to establish an absolutely tight connection between the shaft and the Vr'alzring, which does not loosen even under the strongest continuous stress in operation. The centering of the V.'aizring on the V / elle is completely e :: akt. This makes it possible to adhere to tolerances in Perigdraht that previously could not be adhered to. In addition, damage to the shafts, the sliding rings and the adapter sleeves due to the operational stress as well as due to the frequent up and down pulling of the roller rings are avoided. The forces and torques acting on the roller ring on the shaft are effected by frictional forces. Notch stresses, as they were previously caused by cross wedges or the like, are very much lower. This prevents roll ring breakage and the service life of the Vialzrings is multiplied compared to conventional systems. In addition to these advantages, the V < ■ - ¹ ■ · - ■ -> * - ^ 3 urrer use of handy tools can be exchanged in a few steps in a few steps.

Patent claims:

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Claims (11)

_ ₁₂ _ 1908S42 Patent claims: Attachment of a roller ring, in particular a hard metal roller ring, on a shaft, in particular on a flying shaft end in the finishing block of a wire rolling mill by means of a clamp connection, in which the roller ring with the interposition of an inside and / or outside conical sleeve is clamped with axial preload on the shaft end and secured by a screw, characterized in that the sleeve (1,1 ') is unslotted and its cone angle is in the range of self-locking and that a part of the sleeve (1,1 ') protruding laterally from the roller ring (2,2') holding means (thread in 9, Claws 15) for attaching corresponding organs to one the shaft or the rolling ring supportable pulling tool (10,26,27) has. 2. Fastening according to claim 1, characterized in that a coaxial internal thread is provided in the sleeve 1, into which a screw (11 *) of the pulling tool that can be supported on the end face of the shaft end (7) engages. 3 · Fastening according to claim 2, characterized in that the screw is a hollow screw (10), through the bore of which one engages in a thread on the shaft end The tensioning and locking screw (11) is pushed through. 4. Fastening according to claim 1, characterized in that the sleeve has an external thread on which a pulling tool can be supported on the end face of the roller ring Mother is sitting. 5. Fastening according to claim 1, characterized in that one on the sleeve (l ¹ ) part of a cylinder (26) and piston part (27) existing and serving as a pulling hydraulic press can be attached, while the other part on the end face the shaft end or the roller ring (2) can be supported. 009837/0801 - 15 - 1908C42 6. Fastening according to claim 5 * characterized in that that the end of the sleeve (I ') has claws (15) which with corresponding claws (34) of the cylinder part (32) are lockable in the manner of a bayonet catch, and that the piston part (30) on the end face of the Shaft end can be supported. 7. Fastening according to claim 5, characterized in that the end of the sleeve (l ¹ ) has claws (15) which can be locked with corresponding claws of the cylinder part (26) in the manner of a bayonet lock, and that the piston part (27) is annular and can be supported on the end face of the roller ring (2). 8. Fastening according to claim 5 *, characterized in that the end of the sleeve (I ¹ ) has claws (12) which can be locked with corresponding claws (23) of an annular cylinder part (21) in the manner of a bayonet catch, and that the piston part ( 22) is fixed with clamping screws (24) opposite the shaft end. 9. Fastening according to claims 5 to 8, characterized in that that the end of the sleeve is tightened during operation by means of a clamping screw (17 * 17 *) on the shaft end Safety cap (ΐβ, ΐβ ') is covered, the is supported on the end of the sleeve or on the roller ring (2). 10. Fastening according to claim 9, characterized in that in the case of a safety cap (l68) supported on the roller ring (2 '), the contact surfaces des.Walzringes and the safety cap have undergone a friction-increasing surface treatment. - 14 - 009837/0801 -Ik- 11. Attachment of a roller ring according to claims 1 to IG, characterized in that the sleeve (l, l ^f ) is cylindrical on the outside and that the roller ring (2 ^! ) Zv / ei symmetrically arranged profile grooves (δ, δ '). 009837/0801