JPH073805U - Roll incorporation device and roll extraction device for cantilever mill - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a device that can mechanically fix a taper sleeve when it is press-fitted, and can perform roll incorporation, removal, and roll handling. A roll-incorporating device according to the present invention comprises a hydraulic cylinder unit for pushing a taper sleeve inserted into the ring roll into the ring roll, and a roll holding arm for hanging the lower end of the ring roll on the outer side of the hydraulic cylinder unit. Of the portable roll-incorporating jig, which is pivotally mounted so that it can be opened and closed and whose position can be adjusted in the axial direction, a cross key inserted into a radial through hole formed at the shaft end of the roll shaft, and a taper sleeve. It has a taper sleeve pressing ring arranged on the lower side of the cross key in contact with the upper surface and a tightening bolt at the end of the roll shaft for pressing the cross key. Further, the roll extracting device of the present invention has a portable hydraulic jig for releasing the press-fitting of the taper sleeve, and this hydraulic jig is provided with the hook part of the roll and the hooking part of the taper sleeve. Be hung.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a roll assembling / extracting device of a cantilever mill in which a rolling roll is cantilevered by a roll shaft, and more specifically, a taper sleeve is provided at a shaft end taper portion of a roll shaft supported by a mill stand. The present invention relates to a roll-incorporating device that mounts the roll and can fix the position of the taper sleeve even after the mounting, and a roll-extracting device that releases the press-fitted taper sleeve and carries it out and conveys it together with the roll.

[0002]

[Prior art]

 Generally, in this type of cantilever mill, a taper sleeve is interposed between the inner diameter portion of a short-roll ring roll (hereinafter referred to as a roll) and the taper outer diameter portion of the roll shaft so that the roll is attached to the roll shaft. The rolls are loaded and fixedly fastened by the surface pressure generated between the inner and outer peripheral surfaces of the taper sleeve and the roll and the roll shaft. Conventionally, as a device for incorporating a roll in a cantilever mill, for example, after the roll is loaded to a predetermined position on the roll shaft, a dedicated mounting jig is attached to the end of the roll shaft to install a hydraulic cylinder or screw feed. There is known a structure in which a taper sleeve is pushed between the roll and the roll shaft by a mechanism or the like, the mounting jig is removed, and then the taper sleeve is fixed by another mechanical means. In addition, the taper sleeve has a press-fitting position in the axial direction that changes depending on the material of each roll and the amount of press-fitting.Therefore, it is not carried in and out by the above-mentioned mounting jig as a pair with the roll, and a dedicated handling jig is used. The tool was used to convey the roll to the end of the roll shaft of the cantilever mill, and after it was loaded into the roll shaft, only the taper sleeve was press-fitted between the roll and the roll shaft by the mounting jig. The rolls that were loaded were taken out by a special take-out device that was different from the roll transfer device, and then transferred to the transfer device.

[0003]

[Problems to be solved by the device]

 As described above, the conventional roll-in device has a structure in which the taper sleeve is press-fitted by the mounting jig, the jig is immediately removed, and then the taper sleeve is mechanically pressed. Depending on the condition, when the hydraulic pressure of the mounting jig is released, the taper sleeve slips out to the shaft end side for a slight amount, and as a result, the sticking ability of the mounted roll decreases, so the roll must be set again. However, it takes a lot of labor and time, and in the rolling roll with caliber, a deviation occurs between a pair of rolling rolls, which causes vertical stripes in the rolled material. In addition, since rolls are carried in and out using a special hand jig, it takes a lot of steps and time to replace rolls, which requires a lot of skill.

The present invention makes it possible to mechanically fix the taper sleeve in a state where the taper sleeve is press-fitted with a hydraulic mounting jig, and the roll and the taper sleeve are paired off-line to directly install the roll. The purpose of the present invention is to provide a roll assembling device for a cantilever mill that can be carried by a tool and incorporated into the roll shaft, simplifying the roll mounting work and shortening the work time.

In the present invention, the roll is automatically locked with the taper sleeve extraction jig set at the roll shaft end, and the taper sleeve and the roll can be conveyed as they are after they are extracted as a pair set. It is to provide a roll extracting device for a cantilever mill.

[0006]

[Means for Solving the Problems]

 The roll-in device according to the present invention comprises a hydraulic cylinder unit for pushing a taper sleeve inserted into the ring roll into the ring roll, and a roll holding arm for hooking the lower end of the ring roll to the outer side of the hydraulic cylinder unit. A portable roll-incorporating jig pivotably attached so as to be openable / closable and axially positionally adjustable, a cross key to be inserted into a radial through hole formed at the axial end of the roll shaft, the ring roll, When the taper sleeve is inserted into the roll shaft, it contacts the upper surface of the taper sleeve and is arranged on the outer periphery of the end of the roll shaft on the lower side of the cross key. The taper sleeve pressing ring has a tightening bolt that is screwed into the end of the roll shaft for pressing the sleeve pressing ring. So that the pressed against the tapered sleeve by the biasing of the hydraulic cylinder portion of the built jig.

A roll removing device for a cantilever mill according to the present invention comprises a hydraulic cylinder part for hooking a taper sleeve press-fitted into a ring roll and removing the ring roll from a roll shaft. A roll holding arm for hanging and holding a lower end of the ring roll is provided with a portable roll extracting jig pivotally attached so as to be openable and closable, and a lower end of the piston of the hydraulic cylinder is attached to an upper end of the taper sleeve in a press-fitted state. A hook portion is formed at a lower end of the cylinder of the hydraulic cylinder portion to be engaged with a shoulder portion of the tapered end portion of the roll shaft with a clearance, and a hook portion that engages with an upper flange portion of the taper sleeve is formed. The cylinder is displaced with respect to the roll axis by the bias of.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a roll shaft end during operation of a cantilever mill in which a taper sleeve 2 is press-fitted between a roll 3 and a roll shaft 1 and the taper sleeve is mechanically locked in this state. . 1 to 3, a roll 3 is inserted in a taper portion 1A of a roll shaft 1 at one end thereof, and an adjusting spacer 4 is interposed between the roll 3 and the upper end surface of the roll 3 to form the roll 3 and the one end thereof. The taper sleeve 2 is press-fitted between the taper portion 1A and the upper end flange portion 2A of the taper sleeve 2, and a taper sleeve pressing ring (hereinafter, referred to as a retainer) 5 is attached to the one end taper portion 1A. It is attached to the small end portion 1B. A lateral hole 15 penetrating in the radial direction is formed in the shaft end small-diameter portion 1B of the roll shaft 1, a crosskey 7 is inserted into the lateral hole 15, and a press bolt is held in a bolt hole formed on the shaft end face of the roll shaft 1. 8 is screwed in. The cross key 7 straddles the upper surface of the retainer 5 in the diametrical direction as clearly shown in FIGS. 2 and 3, and the cross key 7 is tightened from above by a presser bolt 8 in cooperation with a roll-incorporating jig to be described later. As a result, the taper sleeve 2 is fixed to the predetermined press-fitting position (regulated by the spacer 4) via the retainer 5. The outer circumference of the upper end flange portion 2A of the taper sleeve 2 is provided with a plurality of crescent-shaped notches 2B in an equidistant relationship in the circumferential direction so that a roll extracting jig to be described later can be mounted (see FIGS. 6 and 11). Are formed.

The retainer 5 has four recesses 5A formed in the inner diameter of the retainer 5 in an equidistant relationship with each other at 90 °, and a plurality of tool engaging holes 5B formed in the outer periphery. On the other hand, two support rods 16 penetrating in the roll axis direction are inserted in the cross key 7, and a compression coil spring arranged between the mid-step portion of the support rod 16 and the support rod insertion hole of the cross key 7 is formed. The cross key 7 is pushed up to the side of the presser bolt 8 in the lateral hole 15 by 44, whereby the lower surface of the cross key 7 rides on the upper surface of the retainer 5. To mount the retainer 5, first, the cross key 7 is inserted into the horizontal hole 15 so that the lower end of the support rod 16 of the cross key 7 contacts the lower surface of the horizontal hole 15 of the roll shaft 1. , The retainer 5 is inserted into the shaft end small diameter portion 1B of the roll shaft 1 from above, and at this time, the retainer 5 is rotated so that the recessed portion 5A of the inner diameter portion is aligned with the position of the cross key 7 (position of phantom line in FIG. 3). Then, the recess 5A passes through the cross key 7, and the retainer 5 is rotated again at the lower position thereof so that the cross key 7 is mounted on the upper surface of the retainer 5.

FIG. 4 is a vertical cross-sectional view of a roll-incorporating device for a cantilever mill according to an embodiment of the present invention, and FIG. 5 is a side view of the roll-incorporating device when viewed from the direction of arrow F in FIG. In FIG. 4, the left half of the vertical center line C shows the state before the press-fitting of the taper sleeve 2, and the right half shows the locked state of the taper sleeve 2 after the press-fitting. The hydraulic roll-incorporating jig indicated by reference numeral 6 as a whole comprises a cylinder 18 suspended by a suspending tool 17 at two opposite locations on the outer side, and a shaft end small diameter portion 1B of the roll shaft 1 housed in the cylinder 18. A hollow piston 19 having an insertable inner diameter, and a thrust plug 11 that is detachably locked to the roll shaft end portion 1D and engages with the upper end of the hollow piston 19 to fix the piston 19 are provided. There is.

In this embodiment, the thrust plug 11 is composed of a nut-shaped member that is screwed with the threaded portion of the roll shaft end portion 1D. The lower end of the cylinder 18 projects downward so as to come into contact with the retainer 5 and the taper sleeve 2 and press them down when the roll is assembled. A pressure oil supply pipe 20 for supplying pressure oil to an internal cylinder chamber 21 is attached to an upper portion of the hollow piston 19, and a rotation stop pin 22 penetrating an upper end plate of the cylinder 18 is provided upright. The pin 22 prevents the cylinder 18 from rotating with respect to the piston 19 and is pressed upward by a compression spring 23 surrounding the pin 22.

A bracket 10 is fixed to the outside of the cylinder of the hydraulic roll-incorporating jig 6 so as to face the diameter direction. A pivot pin 25 is supported on the bracket 10, and a pair of roll holding arms 9 extending downward from the outside of the cylinder are inserted through a long hole 24 formed in the axial direction of the roll holding arm 9 via the pivot pins 25. It is pivotally supported by the bracket 10. Reference numeral 10A is an inverted U-shaped bracket composed of an upper member and both side members, and both side members are pivotally supported by a pivot pin 25. A screw pin 26 protruding through the upper member of the bracket 10A is fixed to the upper end of the roll holding arm 9, and an adjusting nut 27 is screwed to the pin 26, whereby the roll holding arm 9 is positioned in the vertical direction. It is adjustable. Furthermore, an arm opening / closing knob 13 is screwed into the holding arm 9 above the pivot pin 25 of the roll holding arm 9, and the tip of the knob 13 is pressed against the outside of the cylinder 18 to hold the holding arm 9 in place. The opening of the lower end is regulated.

Before the roll 3 is loaded on the roll shaft 1, the cross key 7 is inserted into the lateral hole 15 and the holding bolt 8 is set at the shaft end small diameter portion of the roll shaft 1. The thrust plug 11 described above is removed from the roll shaft 1. The spacer 3 and the taper sleeve 2 and the retainer 5 are assembled to the roll 3 on a roll stand (not shown). In this state, the roll 3 is attached to the lower end hook portion 9A of the roll holding arm 9 of the roll incorporating device so that the lower edge of the roll is fixed. The hydraulic roll assembling jig 6 together with the rolls 3 is hung by the crane hangers 17 and carried onto the roll shaft end of the mill stand. The amount of insertion of the taper sleeve 2 into the roll 3 is previously determined by adjusting the adjustment spacer 4. The roll-incorporating jig 6 is lowered by aligning the shaft center with the taper portion 1A at one end of the roll shaft 1, and the rod-shaped handle (not shown) is inserted into the tool engagement hole 5B (see FIG. 4) on the outer periphery of the retainer 5 during the lowering. ) Is inserted, the retainer 5 is rotated by this rod-shaped handle, and the recess 5A of the retainer 5 is aligned with the cross key 7 set at the shaft end. After that, the roll 3 and the taper sleeve 2 are attached to one end of the roll shaft 1. The taper portion 1A is set. Then, the thrust plug 11 is screwed to the roll shaft end portion 1D, and the hollow piston 19 of the hydraulic roll-incorporating jig 6 is restrained at the lower end position (see the left half of FIG. 4). The retainer 5 is operated in the opposite manner to engage both ends of the cross key 7 with the retainer 5 from above as shown in FIG. Pressure oil is supplied to the cylinder chamber 21 below the piston by the hydraulic pressure supply pipe 20, and the taper sleeve 2 and the roll 3 are press-fitted into the one end taper portion 1A of the roll shaft 1 by the hydraulic pressure due to the lowering of the cylinder 18. While the hydraulic pressure is applied to the cylinder chamber 21, the retainer 5 is pressed against the taper sleeve 2 via the cross key 7 by the presser bolt 8, whereby the taper sleeve 2 is mechanically fixed. After that, the pressure oil in the cylinder chamber 21 is drained, the roll holding arm 9 is removed from the roll 3 by operating the arm opening / closing knob 13, the thrust plug 11 is removed, and the roll assembling jig 6 is pulled out upward. .

In the above-described embodiment, the nut-shaped thrust plug 11 that screw-engages with the roll shaft is used as the hollow piston fixing means of the roll-incorporating jig 6, but the one-touch thrust as shown in FIGS. 7 to 9 is used. By using the plug 28, the operation of attaching and detaching the thrust plug is further facilitated. Both opposite sides of the outer periphery of the shaft end portion 1D of the roll shaft 1 are each cut into a concave shape with an appropriate length in the axial direction over a central angle range of about 90 °, and the other outer peripheral portions are spiral-shaped multistage engagement on the shaft side. The part 29 is formed. A pair of one-touch thrust plugs 28 mounted on the shaft end portion 1D are concavely cut in a diametrically opposed pair over a central angle range slightly exceeding 90 °, and the other plug outer peripheral portions are provided with the shaft side. A spiral plug-side multistage engaging portion 30 that meshes with the multistage engaging portion 29 is formed. The circumferential length of the concave cutout portion 31 of the one-touch thrust plug 28 is longer than the circumferential length of the shaft side multistage engaging portion 29 of the shaft end portion 1D, and accordingly, the concave cutout portion 31 on the plug 28 side and the axial side. The one-touch thrust plug 28 is inserted into the shaft end portion 1D at a position (FIG. 8) where the multi-stage engaging portion 29, the shaft-side concave cutting portion 32, and the plug-side multi-stage engaging portion 30 face each other, and from this position, the thrust plug is inserted. By rotating 28, the entire regions of the shaft-side and plug-side multistage engaging portions 29, 30 are engaged within one rotation, and the hollow piston 19 can be quickly fixed. Similarly, the plug 28 can be pulled out in a short time.

Next, a device for extracting the taper sleeve 2 and the roll 3, which are press-fitted into the roll shaft 1 and mechanically fixed, will be described with reference to FIGS. 10 and 11. In FIG. 10, the right half from the vertical center line C shows a state before the taper sleeve 2 is pulled out, that is, a state where the taper sleeve 2 is press-fitted, and the left half shows a state where the taper sleeve 2 is unpressurized. The hydraulic roll extracting jig indicated by reference numeral 33 as a whole is similar to the hydraulic roll assembling jig 6 in that the cylinder 34 is hung by the suspenders 17 at two opposite locations on the outer side, and the cylinder 34 is accommodated in the cylinder 34. And a hollow piston 35 having an inner diameter through which the shaft end small diameter portion 1B of the roll shaft 1 can be inserted. The lower end of the cylinder 34 is hook-shaped so that the lower surface of the upper flange portion 2A of the taper sleeve 2 can be hooked there. The lower end of the hollow piston 35 is in contact with the step surface between the tapered portion 1A at one end of the roll shaft 1 and the small diameter portion 1B at the shaft end, and in this state, the upper end of the taper sleeve 2 before press release (before extraction) and the piston lower end There is a gap between and. The cylinder chamber 36 is formed between the upper cylinder end wall 34A and the lower piston end wall 35A, contrary to the case of the roll-incorporating jig 6. The structure of the pressure oil supply pipe 20 for supplying the pressure oil to the cylinder chamber 36, the rotation stop pin 22 standing on the upper end of the piston, and the compression spring 23 are the same as those of the roll assembling jig 6 of FIG. .

The upper part of the roll holding arm 39 is pivotally supported by brackets 37 projecting from both sides in the diametrical direction on the cylinder outer side of the extracting jig 33 via pivot pins 38, and is formed at the lower end of the holding arm 39 during roll extraction. The lower edge of the roll 3 is hooked and retained by the hook portion 40 that is formed. Further, an arm opening / closing knob 41 is screwed into the upper end portion of each roll holding arm 39, and the tip of the arm opening / closing knob 41 abuts on the outer side portion of the cylinder, and the rotation operation of the knob 41 opens / closes the roll holding arm 39.

In removing the press-fitted taper sleeve 2 and roll 3, first, the holding bolt 8 at the shaft end is loosened and the upper cross key 7 is pulled out. Next, the retainer 5 is removed from the roll shaft 1. Next, the hydraulic roll take-out jig 33 is lowered and aligned circumferentially so that the hook portion 42 at the lower end of the cylinder 34 of the jig is aligned with the crescent-shaped notch 2B of the upper flange portion 2A of the taper sleeve 2. Then, the hook portion 42 is lowered to the lower side of the flange portion 2A of the taper sleeve 2 and then rotated again to hang the hook portion 42 on the upper end flange portion 2A of the taper sleeve 2. By appropriately fitting the inner diameter portion of the hollow piston 35 and the shaft end small diameter portion 1B, the roll extraction jig 33 is centered with respect to the roll shaft 1, and at this time, the roll holding arm 39 is easily moved by the arm opening / closing knob 41. The roll 3 is set in a hooked state (right half of FIG. 10). Before applying hydraulic pressure to the cylinder chamber 36, a protective nut 43 is attached to the end portion 1D of the roll shaft, the pressure oil is supplied from the pressure oil supply pipe 20 to the cylinder chamber 36, and the taper sleeve 2 is press-fitted by raising the cylinder 34. Release (see left half of Fig. 10). When the taper sleeve 2 is press-fitted and released by the hydraulic pressure in the cylinder chamber 36, an impact force may act on the piston 35 from the taper sleeve 2 side, but since the protection nut 43 is attached to the shaft end portion 1D, the roll extraction is performed. The protrusion of the jig 33 toward the shaft end side is prevented.

After the press-fitting is released, the protective nut is removed, the extraction jig 33 and the roll 3 are integrally lifted by the lifting tool 17, and they are carried on the roll stand as they are to separate the extraction jig 33 from the roll 3. . When the shaft end portion of the roll shaft 1 is configured so that the one-touch thrust plug is used in the roll-incorporating jig, the protective nut has a multistage engaging portion that matches the shape of the shaft end portion. For example, a one-touch protection nut as shown in FIG. 7 is used.

[0019]

[Effect of device]

 As described above, according to the present invention, the roll and the taper sleeve are paired and conveyed directly from the roll storage place by the roll incorporation jig to be mounted on the roll shaft, or after being extracted by the extraction jig, directly to the roll storage place. It can be transported, and the roll attachment / detachment work can be performed efficiently in a short time. Even after the roll is assembled, mechanical locking can be performed while the taper sleeve is being press-fitted, ensuring the accuracy of the roll and taper sleeve assembly. It is possible to safely and swiftly load and unload rolls without the need for skilled work when installing and removing rolls.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a roll shaft end in a locked state of a roll and a taper sleeve incorporated by applying the present invention.

FIG. 2 is a partial vertical sectional view showing an assembled state of a retainer and a cross key according to the present invention.

3 is a plan sectional view taken along the line AA of FIG.

FIG. 4 is a vertical cross-sectional view of a roll incorporating device for a cantilever mill according to an embodiment of the present invention.

5 is a side view seen from the arrow F of FIG.

6 is a cross-sectional view taken along the line BB of FIG.

FIG. 7 is a plan sectional view of a one-touch thrust plug according to an embodiment of the present invention in a plug engagement state.

FIG. 8 is a plan sectional view of the one-touch thrust plug in a plug insertion / extraction state.

9 is a side sectional view taken along the line CC of FIG.

FIG. 10 is a vertical cross-sectional view of a roll extracting device of a cantilever mill according to an embodiment of the present invention.

11 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

 1 Roll Axis 2 Tapered Sleeve 3 Roll 5 Retainer 6 Hydraulic Roll Assembling Jig 7 Cross Key 8 Presser Bolt 9 Roll Holding Arm 11 Thrust Plug 33 Hydraulic Roll Extracting Jig

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Takeshi Tange Takeshi Tange 5-2 Sokai-cho, Niihama-shi, Ehime Sumitomo Heavy Industries, Ltd. Niihama Works

Claims (3)

[Scope of utility model registration request] 1. A roll holding arm for hooking a lower end of the ring roll to an outer side portion of the hydraulic cylinder part, the roll holding arm being openable and closable, comprising a hydraulic cylinder part for pushing a taper sleeve inserted into the ring roll into the ring roll. A portable roll-incorporating jig that is pivotally mounted so that its position can be adjusted in the axial direction, a cross key that is inserted into a radial through hole formed in the shaft end portion of the roll shaft, the ring roll and the taper sleeve. A taper sleeve pressing ring arranged on the outer periphery of the lower end of the cross key of the cross key in contact with the upper surface of the taper sleeve in a state of being inserted in the roll shaft, and pressing the cross key to the taper sleeve pressing ring. And a taper sleeve pressing ring is a hydraulic cylinder of the portable roll assembling jig. Cantilever mill roll built device, characterized by being pressed against the tapered sleeve by the biasing of the. 2. An upper part of a piston of the hydraulic cylinder part is constrained by a one-touch thrust plug attached to a shaft end part of the roll shaft, and a lower end of the cylinder abuts on the taper sleeve and the taper sleeve pressing ring. The roll-incorporating device for a cantilever mill according to claim 1, characterized in that the pressing is performed by urging the cylinder portion. 3. A roll holding device, comprising: a hydraulic cylinder portion for hooking a taper sleeve press-fitted into the ring roll to pull out the ring roll from a roll shaft; and a lower end of the ring roll being hooked to an outer portion of the hydraulic cylinder portion. A movable roll withdrawing jig having an arm pivotally attached so that it can be opened and closed, and a lower end of the piston of the hydraulic cylinder is press-fitted to the upper end of the taper sleeve with a gap, A hook portion that contacts the shoulder portion and engages with the upper flange portion of the taper sleeve is formed at the cylinder lower end of the hydraulic cylinder portion, and the cylinder is displaced with respect to the roll shaft by the bias of the hydraulic cylinder portion. A roll extractor for a cantilever mill that is characterized by: