JPH0661302U - Rolling roll fixing device - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the ring roll fixing structure, improve the workability of ring roll attachment / detachment, improve the rolling mill operating rate, and reduce costs. [Structure] A roll shaft 2 pivotally supported by a cantilever type mill stand 1, a taper sleeve 4 interposed between the roll shaft 2 and a ring roll 3, and a roll shaft end screw portion 6 screwed together. A rolling roll fixing device comprising a fixing nut 5,
A nut engagement peripheral groove 10 is provided at the end of the taper sleeve 4 on the roll shaft end side, a ring-shaped engagement projection 11 is provided at the end of the fixed nut 5 on the ring roll 3 side, and the projection 11 is provided in the peripheral groove 10.
Are rotatably fitted and engaged with each other, the rotation of the fixing nut 5 allows the taper sleeve 4 to move in the axial direction, and the taper sleeve 4 is pushed in or pulled out between the roll shaft 2 and the ring roll 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for detachably fixing a ring-shaped rolling roll (hereinafter referred to as a ring roll) on a roll shaft that is supported by a cantilever type mill stand.

[0002]

[Prior art]

 Conventionally, as this type of ring roll fixing device, one exemplified in FIG. 4 has been known (see Japanese Utility Model Publication No. 1-28885). In FIG. 4, 31 is a roll shaft pivotally supported by the cantilever type mill stand 30, 32 is a ring roll, 33 is a taper sleeve interposed between the roll shaft 31 and the ring roll 32, and 34 is a taper sleeve 33. A protective cover for covering the attachment / detachment portion 35 is a lock nut screwed on a screw portion 37 provided at the end of the roll shaft, and the protective cover 34 is also adapted to rotate together with the roll shaft 31.

A caliber 38 is engraved on the outer peripheral surface of the ring roll 32. When the ring roll 32 is replaced due to wear of the caliber 38 or the like, after removing the lock nut 36 and the protective cover 34, The taper sleeve 33, which is press-fitted between the ring roll 32 and the roll shaft 31, is removed by using the extraction jig 39 shown in FIG.

That is, in FIG. 5, first, the extraction jig 39 is inserted into the chrysanthemum nut portion 35A of the attachment / detachment portion 35 of the taper sleeve 33, and is slightly rotated to engage with the chrysanthemum nut portion 35A. When high-pressure hydraulic oil is introduced from the oil supply / discharge port 44 between the metal fitting 41 fixed to the inner surface 40A of the extraction jig casing 40 and the cylinder portion 43 formed by the piston 42, the spring 45 has an elastic force. By contrast, the piston 42 moves to the roll 32 side, and the tip 42A of the piston 42 contacts the roll shaft end surface 31A. The piston contact reaction force acts so as to move the extraction jig 39 in the direction indicated by the arrow (b) in FIG. 5, so that the taper sleeve 33 is extracted from the roll shaft 31 via the surface 40B.

Further, when the new ring roll 32 is attached to the roll shaft 31, an attachment jig 46 shown in FIG. 6 is used. The jig 46 is attached to the taper sleeve 33 by engaging the engagement surface 47A of the main body 47 with the chrysanthemum nut portion 35B of the attachment / detachment portion 35 of the taper sleeve 33. The screw hole 49 of the reaction force receiving member 48 of the jig 46 is screwed and fixed to the screw portion 37 of the roll shaft 31.

A plurality of cylinders 50 are provided in the main body 47, and a plurality of pistons 51 fitted in the cylinders 50 are moved by the high-pressure hydraulic oil from the oil supply / discharge port 52 as indicated by arrows (b) in FIG. When the piston outer end surface 51A abuts against and presses against the reaction force receiving member 48 in the direction shown, the pressing reaction force is transmitted to the taper sleeve 33 via the main body 47, and the taper sleeve 33 moves toward the ring roll 32. As a result of being press-fitted between the inner peripheral surface 32A and the outer peripheral surface 31A of the taper portion of the roll shaft 31, the ring roll 32 and the roll shaft 31 are fixedly fastened via the taper sleeve 33, and the ring roll 32 is removed. The attaching work is completed.

[0007]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, two jigs for extraction and attachment are prepared for attachment / detachment work of the ring roll, the lock nut 36 and the cover 34 are removed, and then the jig 39 or 46 is attached from the outside to fix the two jigs. Since the tools 39 and 46 must be used alternately, the lock nut 36 and the cover 34 must be attached, the replacement work of the ring roll 32 becomes complicated, and a lot of work time is required. There is a problem such as decreasing

The present invention has been made in view of the above situation, and an object thereof is to improve the workability of attaching / detaching a ring roll, improve the rolling mill operating rate, simplify the structure, and reduce the cost. An object of the present invention is to provide a roll roll fixing device that can be designed.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention takes the following technical means. That is, the present invention provides a roll shaft supported by a cantilever type mill stand, a ring-shaped rolling roll fixed to the roll shaft, and a taper sleeve interposed between the roll shaft and the rolling roll. A rolling roll fixing device comprising a fixing nut screwed into a screw portion of the shaft end of the roll shaft, wherein the roll shaft end side end portion of the taper sleeve is the taper ring side end portion of the nut. It is characterized in that they are engaged with each other so as to be rotatable relative to each other.

[0010]

[Action]

 According to the present invention, when the ring roll is attached to the roll shaft, the ring roll is externally fitted to the roll shaft through the taper sleeve, the fixing nut is screwed onto the threaded portion of the roll shaft, and then the turning tool is used to correct it. By rotating in the direction, the taper sleeve is strongly pushed by the fixing nut between the ring roll and the roll shaft, and the ring roll is firmly fixed.

When the ring roll is removed from the roll shaft, the fixing nut is rotated in the opposite direction by a rotating tool or the like, and the taper sleeve and the ring roll move together with the movement of the fixing nut toward the roll shaft end. The ring roll is released from between the roll shafts and the ring roll is released. In addition, loosening of the fixing nut can be prevented by reversing the roll shaft end thread and the fixing nut in the direction of rotation of the ring roll during rolling.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, 1 is a cantilever type mill stand, 2 is a roll shaft rotatably and horizontally supported by the stand 1, and 3 is a reel fixed to the roll shaft 2. Ring roll 4, 4 is a taper sleeve interposed between the roll shaft 2 and ring roll 3, and 5 is a fixing nut, which is provided at the shaft end 2C of the roll shaft 2 and is opposite to the rotating direction of the ring roll 3 during rolling. It is screwed into the threaded portion 6 of the direction.

The roll shaft 2 is rotatably supported by a bearing (not shown), and the ring roll mounting portion 2 A has a tapered shape, and the tip 2 C side of the mounting portion 2 A has a reduced diameter and its outer peripheral surface. Is provided with the screw portion 6. The end surface 2B of the roll shaft 2 is provided with a fitting hole 7 for a rotary tool, for example, a rotary actuator shaft, in the axial direction. The inner peripheral surface of the hole 7 has a plurality of locking grooves parallel to the axis. 8 (key groove) is provided.

The ring roll 3 has a circular hole whose inner peripheral surface 3 A is parallel to the axis, and a peripheral groove-shaped caliber 9 is provided on the outer peripheral surface 3 B. The inner peripheral surface 4A of the taper sleeve 4 is a tapered hole having the same taper as the taper of the ring roll mounting portion 2A of the roll shaft 2, and the outer peripheral surface 4B is removably fitted to the inner peripheral surface 3A of the ring roll 3. The sleeve 4 has a cylindrical surface parallel to the axis, the end portion of the roll shaft of the sleeve 4 projects from the end surface of the ring roll 3, and a nut engaging circumferential groove 10 is provided on the outer peripheral surface of the end portion.

The fixed nut 5 has a ring-shaped engagement member in which an inner peripheral surface 5 A on the ring roll 3 side is expanded and the end thereof is rotatably fitted and engaged in the peripheral groove 10 of the taper sleeve 4. A projecting ridge 11 is provided, and the taper sleeve 4 and the fixing nut 5 are connected to each other in a mutually rotating manner. In order to realize the engagement between the circumferential groove 10 and the ridge 11, specifically, the taper sleeve 4 is divided into two in parallel with the axis, or the ridge 11 is separated. You can divide this into two parts.

Further, the fixing nut 5 is provided with a plurality of engaging holes 12 on an end surface 5B opposite to the protrusion 11 (roll shaft end surface 2B side). Reference numeral 13 is a nut rotating tool, for example, a rotary actuator, and a rotary shaft 14 is freely inserted into and disengaged from the fitting hole 7 of the roll shaft 2. The outer peripheral surface of the rotary shaft 14 corresponds to the engaging groove 8 and is formed in the groove 8. An engaging key 15 is provided, and an engaging attachment 16 having a plurality of engaging pins 17 on a front surface 16A is fixed to an end surface 13B of the rotary actuator casing 13A on the protruding side of the rotary shaft 14.

The engagement pin 17 corresponds to the engagement hole 12 of the fixed nut 5 and is engageably and disengageably engaged with the engagement hole 12 of the fixed nut 5 by receiving the rotational reaction force of the rotary actuator 13. In the above embodiment, when the ring roll 3 is attached to the roll shaft 2, the ring roll 3 is externally fitted to the taper sleeve 4, and the taper sleeve 4 is fitted to the ring roll attachment portion 2A of the roll shaft 2 and fixed. After the nut 5 is screwed into the threaded portion 6 of the roll shaft 2, the rotary shaft 14 of the rotary actuator 13 is fitted into the fitting hole 7 of the roll shaft 2 and the key 15 is fitted into the locking groove 8. At the same time, the engaging pin 17 is fitted and engaged in the engaging hole 12.

Next, the rotary actuator 13 is operated to rotate the rotary shaft 14 in the forward direction, whereby the fixed nut 5 is screwed in the direction of arrow (a) in the figure, and the taper sleeve 4 does not rotate but the ring roll. 3 and the roll shaft 2, the ring roll 3 is firmly fixed to the ring roll mounting portion 2A of the roll shaft 2 by the taper effect. Further, even if the ring roll 3 rotates during rolling, the fixing nut 5 is self-tightening and does not loosen because the screw portion 6 is a screw opposite to the rotation direction thereof.

Next, when the ring roll 3 is detached from the roll shaft 2, the rotary shaft 14 and the engagement pin 17 of the rotary actuator 13 are fitted into and engaged with the fitting holes 7 and 12 as described above. After that, when the rotary shaft 14 of the rotary actuator 13 is rotated in the reverse direction, the fixed nut 5 is screwed back in the direction indicated by the arrow (B) in FIG. 1, and the taper sleeve 4 is also moved, so that the ring roll 3 and the roll shaft are rotated. The ring roll 3 is released from the space between the mounting portion 2A and the mounting portion 2A.

Then, the fixing nut 5 is removed from the threaded portion 6 of the roll shaft 2, and the ring roll 3 is pulled out from the roll shaft 2 together with the taper sleeve 4. When replacing with a new ring roll 3 again, the new ring roll 3 can be fitted onto the taper sleeve 4 and attached and fixed to the roll shaft 2 in the order described above. According to the above-described embodiment, the ring roll 3 can be attached and detached with only one tool in which the attachment 16 is fixed to the commercially available rotary actuator 13 which is a rotary tool, and the lock nut and the protective cover in the conventional example. In addition, it does not require an extraction jig and a mounting jig, and it is extremely easy to operate. In addition, it has a locking effect due to the screw direction of the fixing nut 5, and no special locking mechanism is required.

FIG. 2 shows an essential part of a second embodiment of the present invention. The difference from the first embodiment is that the taper sleeve 4 is located between the ring roll 3 and the fixing nut 5 and the sliding contact ring 18 is provided. Is externally fitted, and the sliding contact ring 18 is pressed against the side surface of the ring roll 3 by a push bolt 19 which is threadedly threaded through the fixed nut 5 in parallel with the axis of the fixed nut 5 to regulate the axial movement of the ring roll 3. The point is that an additional mechanism is provided.

Also in the second embodiment, the same effect as that of the first embodiment can be expected. Therefore, the same reference numerals as in FIG. 1 are given and detailed description is omitted. FIG. 3 shows an essential part of a third embodiment of the present invention. The difference from the first embodiment is that the taper sleeve 4, the ring roll 3 and the fixing nut 5 are provided with disc spring holding rings 20, 21 and a disc. The axial movement restriction mechanism 23 of the ring roll 3 including the spring 22 is externally fitted, and the same effect as that of the first embodiment can be expected. Therefore, the same reference numerals as in FIG. 1 are given and detailed description thereof is omitted.

In each of the above-described embodiments, the rotary shaft 14 of the rotary actuator 13 and its fitting hole 7 are made into a square or hexagonal shape, and the locking groove 8 and the key 15 are eliminated, so that the turning tool can be attached and detached. Can be easy. Further, a key and a key groove are provided between the tapered fitting surfaces 2A and 4A of the taper sleeve 4 and the roll shaft 2 so as to prevent the rotation slip of the ring roll 3 from being transmitted to the fixed nut 5. Looseness can be prevented.

The present invention is not limited to the above-mentioned embodiment, but the design can be changed as appropriate, and the present invention can be applied to, for example, a roll shaft that is vertically or inclinedly supported by a stand. As the turning tool, a commercially available tool other than the rotary actuator 13 can be adopted.

[0025]

[Effect of device]

 As described above, the present invention is provided with a roll shaft pivotally supported by a cantilever type mill stand, a ring-shaped rolling roll fixed to the roll shaft, and an interposition between the roll shaft and the rolling roll. A rolling roll fixing device comprising a tapered sleeve and a fixing nut screwed into the threaded portion of the roll shaft end, wherein the roll shaft end side end portion of the taper sleeve is attached to the taper ring side end portion of the nut. Since they are engaged with each other so that they can rotate relative to each other, the structure is extremely simple and the ring roll can be prevented from being loosened. Since it is possible to take out and attach the work pieces, it is possible to improve the workability of attachment and detachment and shorten the attachment and detachment time, and it is possible to improve the rolling mill operating rate and reduce the cost.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a main part of the second embodiment.

FIG. 3 is a vertical cross-sectional view showing a main part of the third embodiment.

FIG. 4 is a vertical sectional view showing a conventional example.

FIG. 5 is a vertical cross-sectional view showing a state in which a ring roll is removed in a conventional example.

FIG. 6 is a vertical cross-sectional view showing a state where the ring roll is attached.

[Explanation of symbols]

 1 Mill Stand 2 Roll Shaft 2C Roll Shaft End 3 Ring Roll 4 Tapered Sleeve 5 Fixed Nut 6 Threaded Part 10 Nut Engagement Groove 11 Ring Engagement Protrusion

Claims (1)

[Scope of utility model registration request] 1. A roll shaft axially supported by a cantilever type mill stand, and a ring-shaped rolling roll fixed to the roll shaft,
A rolling roll fixing device comprising a taper sleeve interposed between a roll shaft and a rolling roll, and a fixing nut screwed into a threaded portion of the shaft end of the roll shaft, wherein the roll shaft of the taper sleeve An end portion on the end side is engaged with an end portion on the taper ring side of the nut so as to be rotatable relative to each other.