JP2602231Y2 - Roll assembling device and roll extracting device for cantilever mill - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a device for assembling and removing a roll of a cantilever mill in which a rolling roll is cantilevered on a roll shaft, and more specifically, a shaft end taper portion of a roll shaft supported on a mill stand. A roll assembling device in which the roll is mounted via a taper sleeve and the position of the taper sleeve can be fixed even after the roll is mounted, and a press-release of the press-fitted taper sleeve is carried out together with the roll to carry out and convey the roll. Related to the device.

[0002]

2. Description of the Related Art Generally, in this kind of cantilever mill,
The roll is inserted into the roll shaft with a tapered sleeve interposed between an inner diameter portion of a short body ring roll (hereinafter referred to as a roll) and a tapered outer diameter portion of the roll shaft. The roll is fixedly fastened by the surface pressure generated between the roll and the roll and the roll shaft.
Conventionally, as a device for incorporating a roll in a cantilever mill, for example, after loading the roll to a predetermined position on the roll shaft, a dedicated mounting jig is attached to an end of the roll shaft, and a hydraulic cylinder or a screw feed mechanism is mounted. For example, there is known a structure in which a taper sleeve is pushed between the roll and the roll shaft, the mounting jig is removed, and the taper sleeve is fixed by another mechanical means. In addition, since the press-fitting position in the axial direction of the taper sleeve changes depending on the material of each roll and the amount of press-fit, the carrying-in / out of the paired set with the roll is not performed by the mounting jig. Then, the roll is transported to the end of the roll shaft of the cantilever mill, and is loaded into the roll shaft, and then only the tapered sleeve is press-fitted between the roll and the roll shaft using the mounting jig. The loaded roll was extracted by a dedicated extraction device different from the roll transport device, and then transferred to the transport device.

[0003]

As described above, the conventional roll assembling apparatus has a structure in which the jig is removed immediately after the taper sleeve is press-fitted by the mounting jig, and thereafter the taper sleeve is mechanically pressed. Therefore, depending on the state of the mating surface of the taper sleeve, when the oil pressure of the mounting jig is released, the taper sleeve comes out a small amount to the shaft end side, and as a result, the fixing ability of the mounted roll is reduced. Requires a lot of labor and time,
In the case of the calender-equipped rolling roll, a gap is generated between the pair of rolling rolls, causing vertical streaks in the material to be rolled. In addition, because the rolls are carried in and out using a dedicated handling jig, the replacement of the rolls requires many steps and time, and requires a lot of skill.

The present invention provides a hydraulic mounting jig in which the taper sleeve can be mechanically fixed while the taper sleeve is being press-fitted, and the roll and the taper sleeve are paired off-line, and the roll mounting jig is used as it is. It is an object of the present invention to provide a cantilever mill roll assembling apparatus which can be transported by the above-mentioned method and incorporated into a roll shaft, which simplifies a roll attaching operation and shortens an operation time.

The present invention also provides a cantilever mill in which the roll is automatically locked in a state where the taper sleeve extracting jig is set at the roll shaft end, and the taper sleeve and the roll can be conveyed as they are extracted in pairs. To provide a roll extracting device.

[0006]

A roll assembling apparatus according to the present invention includes a hydraulic cylinder portion for pushing a tapered sleeve inserted into a ring roll into the ring roll, and the outer periphery of the hydraulic cylinder portion is provided with the hydraulic cylinder portion. A roll holding arm for hanging the lower end is rotatably opened and closed and axially position-adjustable, and is inserted into a portable roll assembling jig and a radial through hole formed at a shaft end of the roll shaft. And a taper sleeve pressing ring disposed on the outer periphery of the lower end of the cross key in contact with the upper surface of the tapered sleeve with the ring roll and the tapered sleeve inserted into the roll shaft. And a tightening bolt screwed into an end of a roll shaft for pressing the cross key against the tapered sleeve pressing ring. Ring is adapted to be pressed against the tapered sleeve by the biasing of the hydraulic cylinder portion of the adjustable-transportable roll built jig.

[0007] The roll extraction device for a cantilever mill according to the present invention comprises a single- end tape having a larger diameter than the small-diameter portion of the shaft end following the small-diameter portion of the shaft end.
From the roll shaft on which the taper portion is formed,
Ring fitted into end taper via taper sleeve
In a roll extraction device of a cantilever mill that extracts a roll
The ring roll and one end tapered portion of the roll shaft;
A hydraulic cylinder portion that hangs the tapered sleeve pressed in between and pulls out the ring roll from the roll shaft, and a roll holding arm that hangs the lower end of the ring roll on the outer side of the hydraulic cylinder portion can be opened and closed. has a pivotally mounted portable roll sampling tool, the piston lower end of the hydraulic cylinder unit, the upper end of the tapered sleeve is in the press - fit state
There is a gap between the one end tapered portion of the roll shaft and the front
Kijikutan adapted to brought into contact with the step surface of the small diameter portion,
The cylinder lower end of the hydraulic cylinder unit, front Symbol hook to the lower surface portion engages the upper flange portion of the taper sleeve is formed, the gap the cylinder relative to the roll axis by the urging of the hydraulic cylinder unit Within the range .

[0008] Next, the present invention will be described with reference to the accompanying drawings of embodiments. FIG. 1 is a longitudinal sectional view showing a roll shaft end when a cantilever mill is operated 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. Referring to FIGS. 1 to 3, the roll 3 is inserted into the one-end tapered portion 1 </ b> A of the roll shaft 1, and the adjustment spacer 4 is interposed between the roll 3 and the upper end surface of the roll 3, and the one-end tapered portion. 1A, the tapered sleeve 2 is press-fitted, and the upper end flange portion 2 of the tapered sleeve 2 is further pressed.
A, a tapered sleeve pressing ring (hereinafter referred to as a retainer) 5 is mounted on the shaft end small diameter portion 1B following the one end tapered portion 1A. Shaft end small diameter portion 1B of roll shaft 1
Is formed with a lateral hole 15 penetrating in the radial direction.
5, a cross key 7 is inserted, and a holding bolt 8 is screwed into a bolt hole formed in the shaft end face of the roll shaft 1.
The cross key 7 is diametrically straddled on the upper surface of the retainer 5 as clearly shown in FIGS. 2 and 3, and the cross key 7 is tightened from above with a holding bolt 8 in cooperation with a roll assembly jig described later. Thereby, the tapered sleeve 2 is fixed to the predetermined press-fitting position (regulated by the spacer 4) via the retainer 5. The outer periphery of the upper end flange portion 2A of the tapered sleeve 2 is provided with a plurality of crescent-shaped notches 2B (see FIGS. 6 and 11) equidistantly in the circumferential direction in order to allow a roll extracting jig to be described later. Is formed.

The retainer 5 has four concave portions 5A formed in the inner diameter portion thereof at an equidistant relationship of 90 °, and a plurality of tool engagement holes 5B formed in the outer peripheral portion. On the other hand, two support rods 16 penetrating in the roll axis direction are inserted into the cross key 7, and a compression coil spring 44 disposed between the middle step portion of the support rod 16 and the support rod insertion hole of the cross key 7. As a result, the cross key 7 is pushed up to the holding bolt 8 in the lateral hole 15, whereby the lower surface of the cross key 7 rides on the upper surface of the retainer 5.
First, the retainer 5 is mounted on the support rod 1 of the cross key 7.
6 with the cross key 7 inserted into the horizontal hole 15 such that the lower end of the cross key 6 contacts the lower surface of the horizontal hole 15 of the roll shaft 1.
At this time, the retainer 5 is rotated so that the concave portion 5A of the inner diameter portion is aligned with the position of the cross key 7 (the position indicated by the phantom line in FIG. 3). The retainer 5 is rotated again at the position, and the retainer 5 is mounted so that the cross key 7 straddles the upper surface of the retainer 5.

FIG. 4 is a longitudinal sectional view of a roll assembling apparatus of a cantilever mill according to an embodiment of the present invention, and FIG. 5 is a side view of the roll assembling apparatus viewed from the arrow F in FIG. In FIG. 4, the left half from the vertical center line C shows a state before the press-fitting of the tapered sleeve 2, and the right half shows a locked state of the tapered sleeve 2 after the press-fitting. A hydraulic roll assembly jig indicated by reference numeral 6 as a whole includes a cylinder 18 hung by a hanger 17 at two opposing outer portions and a shaft end small-diameter portion 1B of the roll shaft 1 housed in the cylinder 18 and held therein. It has a hollow piston 19 having an inner diameter that can be inserted, and a thrust plug 11 that is detachably engaged with the roll shaft end 1D and engages with the upper end of the hollow piston 19 to fix the piston 19. .

In this embodiment, the thrust plug 11 is formed of a nut-like member that is screwed with the thread of the roll shaft end 1D. The lower end of the cylinder 18 protrudes downward so as to come into contact with the retainer 5 and the tapered sleeve 2 and press down when the roll is assembled. A pressure oil supply pipe 20 that supplies pressure oil to an internal cylinder chamber 21 is attached to an upper portion of the hollow piston 19, and a detent pin 22 that penetrates an upper end plate of the cylinder 18 is provided upright. The pin 18 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 outer side of the cylinder of the hydraulic roll assembling jig 6 in a diametrically opposed manner. A pivot pin 25 is supported on the bracket 10,
A pair of roll holding arms 9 extending downward from the outside of the cylinder are pivotally supported by the brackets 10 via pivot pins 25 inserted into elongated holes 24 formed in the axial direction. 10A is an inverted U-shaped bracket comprising an upper member and both members, both members of which are pivotally supported by pivot pins 25. At the upper end of the roll holding arm 9, a screw pin 26 projecting through the upper member of the bracket 10A is fixed, and an adjusting nut 27 is screwed to the pin 26, whereby the roll holding arm 9 is positioned vertically. It is adjustable. Further, an arm opening / closing knob 13 is screwed into the holding arm 9 at a position above the pivot pin 25 of the roll holding arm 9, and the knob 13
By pressing the tip of the holding arm 9 against the outside of the cylinder 18, the opening of the lower end of the holding arm 9 is regulated.

Before loading the roll 3 on the roll shaft 1,
The cross key 7 is inserted into the horizontal hole 15, and the holding bolt 8 is set on the small diameter portion of the roll shaft 1 at the shaft end. Further, the aforementioned thrust plug 11 is detached from the roll shaft 1.
The spacer 4, the tapered sleeve 2, and the retainer 5 are assembled to the roll 3 on a roll mounting table (not shown). In this state, the roll 3 is hooked on the lower edge of the roll with the lower end hook 9 </ b> A of the roll holding arm 9 of the roll assembling device. Then, the hydraulic roll assembling jig 6 is suspended together with the rolls 3 by the crane suspenders 17 and carried onto the roll shaft end of the mill stand. The amount of taper sleeve 2 inserted into roll 3 is determined in advance by adjusting adjustment spacer 4. The roll assembling jig 6 is lowered by aligning the one end tapered portion 1A of the roll shaft 1 with the axis, and the tool engagement hole 5B on the outer periphery of the retainer 5 during the descent (see FIG. 4).
Then, the retainer 5 is rotated with the rod-like handle, and the concave portion 5A of the retainer 5 is aligned with the cross key 7 set at the shaft end. The roll shaft 1 is set at one end tapered portion 1A. Next, the thrust plug 11 is screwed to the roll shaft end portion 1D, and the hollow piston 19 of the hydraulic roll assembling jig 6 is restrained at the lower end position (see the left half in FIG. 4). By operating the retainer 5 in the reverse direction, both ends of the cross key 7 are engaged with the retainer 5 from above as shown in FIG. Pressurized oil is supplied to the cylinder chamber 21 below the piston by the hydraulic supply pipe 20, and the taper sleeve 2 and the roll 3 are pressed into the one-end tapered portion 1 </ b> A of the roll shaft 1 by the hydraulic pressure due to the lowering of the cylinder 18. When the hydraulic pressure is acting on the cylinder chamber 21, the cross key 7 is
, The retainer 5 is pressed against the tapered sleeve 2 so that the tapered sleeve 2 is mechanically fixed. Thereafter, the pressure oil in the cylinder chamber 21 is drained, and the roll holding arm 9 is operated by operating the arm opening / closing knob 13 to release the roll 3.
, 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 which is screw-engaged with the roll shaft is used as the hollow piston fixing means of the roll assembling jig 6, but the one-touch thrust as shown in FIGS. By using the plug 28, the operation of attaching and detaching the thrust plug becomes easier. The opposite sides of the outer periphery of the shaft end 1D of the roll shaft 1 each have approximately 9
A concave portion is cut off at an appropriate length in the axial direction over a central angle range of 0 °, and a helical shaft-side multistage engaging portion 29 is formed on the other outer peripheral portion. The inner diameter portion of the one-touch thrust plug 28 mounted on the shaft end portion 1D is diametrically opposed and cut out in a concave shape over a center angle range slightly exceeding a pair of 90 °. A spiral plug-side multi-stage engaging portion 30 that meshes with the 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. The one-touch thrust plug 28 is inserted into the shaft end portion 1D at a position (FIG. 8) where the recess 29 on the shaft side and the concave cutout portion 32 on the shaft side and the plug side multi-stage engaging portion 30 face each other, and the thrust plug 28 is rotated from this position. By doing so, the entire region of the multistage engaging portions 29 and 30 on the shaft side and the plug side is engaged within one rotation, and the hollow piston 19 can be quickly fixed. The removal of the plug 28 can likewise be done 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 fixed mechanically will be described with reference to FIGS. In the present invention
Such a roll extracting device includes a shaft end small-diameter portion 1B followed by the shaft end.
Roll with one-end tapered portion 1A larger in diameter than small-diameter portion
From the shaft 1, a taper thread is formed on the tapered portion at one end of the roll shaft.
Cantilever for extracting the roll 3 inserted through the probe 2
The roll 3 and the roll
Tapered between the tapered portion 1A of the shaft 1
Hold the leave 2 and remove the roll 3 from the roll shaft 1.
A hydraulic cylinder portion to be wiped, an outer portion of the hydraulic cylinder portion
Holding arm for hanging the lower end of the roll 3 on the arm
39 has a portable roll removal jig pivotally attached to open and close
The lower end of the piston 35 of the hydraulic cylinder portion is press-fitted.
A gap S between the upper end of the tapered sleeve 2
The one end tapered portion 1A of the roll shaft 1 and the small shaft end
It comes into contact with the step surface 45 with the diameter portion 1B,
At the lower end of the cylinder 34 of the hydraulic cylinder portion, the taper
Engage with the lower surface of upper end flange 2A of sleeve 2
A hook portion 42 is formed, which is used to bias the hydraulic cylinder portion.
As a result, the cylinder 34 has a smaller gap with respect to the roll shaft 1.
It is configured to be displaced within the range of
More specifically, in FIG. 10, the right half from the vertical center line C shows a state before the taper sleeve 2 is removed, that is, a state in which the taper sleeve 2 is press-fitted, and the left half shows a state in which the press-fitting of the taper sleeve is released. A hydraulic roll removal jig indicated by reference numeral 33 as a whole is a cylinder 34 hung by two hanging parts 17 at two opposing outer sides similarly to the hydraulic roll assembly jig 6.
And a hollow piston 35 housed in the cylinder 34 and having an inside diameter that allows the shaft end small diameter portion 1B of the roll shaft 1 to be inserted. The lower end of the cylinder 34 has a hook shape so that the lower surface of the upper end flange portion 2A of the tapered sleeve 2 is hooked. The lower end of the hollow piston 35 contacts the step surface 45 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 tapered sleeve 2 and the lower end of the piston at the time of press-fitting (before extraction) are formed. There is a gap S between them. 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 assembly jig 6. The configuration of the pressure oil supply pipe 20 for supplying the pressure oil to the cylinder chamber 36, the locking pin 22 erected at the upper end of the piston, and the compression spring 23 is shown in FIG.
Is the same as

The upper portion of the roll holding arm 39 is pivotally supported by a bracket 37 projecting from the diametrically opposite side of the cylinder outer portion of the extraction jig 33 via a pivot pin 38, and is formed at the lower end of the holding arm 39 when the roll is extracted. Hook part 4
At 0, the lower edge of the roll 3 is hung.
Further, an arm opening / closing knob 41 is screwed into an upper end portion of each roll holding arm 39, and a tip of the knob 41 comes into contact with an outer portion of the cylinder, and the roll holding arm 39 is opened / closed by rotating the knob 41.

At the time of removing the press-fit taper sleeve 2 and roll 3, first, the holding bolt 8 at the shaft end is loosened, and the upper cross key 7 is removed. Next, the retainer 5 is removed from the roll shaft 1. Next, the hydraulic roll removal jig 3
3 is lowered, and the hook portion 42 at the lower end of the cylinder 34 of the jig is circumferentially aligned so that the hook portion 42 at the lower end of the cylinder 34 coincides with the crescent-shaped notch 2B of the upper end flange portion 2A of the tapered sleeve 2. After lowering the lower portion of the second flange portion 2A, the hook portion 42 is rotated again to lock the hook portion 42 on the upper end flange portion 2A of the tapered sleeve 2. By appropriately fitting the inner diameter portion of the hollow piston 35 and the shaft end small diameter portion 1B, the roll extracting jig 33 is centered with respect to the roll shaft 1, and at this time, the roll holding arm 39 is easily rolled by the arm opening / closing knob 41. (Right half in 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, pressure oil is supplied from the pressure oil supply pipe 20 to the cylinder chamber 36, and the press-in of the taper sleeve 2 is released by raising the cylinder 34. (See the left half of FIG. 10). When the taper sleeve 2 is press-fitted and released by the oil pressure in the cylinder chamber 36, an impact force may act on the piston 35 from the taper sleeve 2 side. However, since the protective nut 43 is attached to the shaft end 1D, the roll is removed. The jig 33 is prevented from protruding toward the shaft end.

After the press-fit is released, remove the protective nut,
The sampling jig 33 and the roll 3 are lifted integrally by the hanging tool 17, carried as it is onto the roll table, and the sampling jig 33 is separated from the roll 3. When the shaft end of the roll shaft 1 is configured so that the one-touch thrust plug is used in the roll assembly jig, the protective nut is a member having a multi-step engaging portion that matches the shape of the shaft end, For example, a one-touch protection nut as shown in FIG. 7 is used.

[0019]

As described above, according to the present invention, a roll and a taper sleeve are transported in a pair set directly from a roll storage site by a roll installation jig and mounted on a roll shaft, or pulled out by a extraction jig. After that, it can be transported to the roll storage area as it is, and the roll attaching / detaching operation can be performed efficiently and in a short time. Even after the roll is assembled, the taper sleeve can be mechanically locked in a press-fit state, and the roll and the taper sleeve can be assembled with high accuracy. Skills are not required for assembling and extracting rolls as in the past, and the rolls can be safely and quickly attached and detached.

[Brief description of the 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 longitudinal sectional view showing an assembled state of the retainer and the cross key according to the present invention.

FIG. 3 is a plan sectional view taken along line AA of FIG. 2;

FIG. 4 is a longitudinal sectional view of a roll assembling device of the cantilever mill according to the embodiment of the present invention;

FIG. 5 is a side view as viewed from an arrow F in FIG. 4;

FIG. 6 is a plan sectional view taken along line BB of FIG. 4;

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

FIG. 8 is a plan cross-sectional view of the one-touch thrust plug in a plug inserted / extracted state.

9 is a side sectional view taken along the line CC of FIG. 7;

FIG. 10 is a longitudinal sectional view of the roll extracting device of the cantilever mill according to the embodiment of the present invention.

11 is a plan sectional view taken along line DD of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll shaft 2 Tapered sleeve 3 Roll 5 Retainer 6 Hydraulic roll installation jig 7 Cross key 8 Holding bolt 9 Roll holding arm 11 Thrust plug 33 Hydraulic roll removal jig

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takeshi Tange 5-2 Sokai-cho, Niihama-shi, Ehime Prefecture Niihama Works, Sumitomo Heavy Industries, Ltd. (56) References JP-A-53-78216 (JP, A) JP-A-57-112917 (JP, A) JP-A-7-323308 (JP, A) JP-A-4-90103 (JP, U) JP-A-3-120904 (JP, U) JP-A-6-61302 ( (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 31/08 B21B 27/03 520 B21B 31/12

Claims (3)

(57) [Scope of request for utility model registration] 1. A hydraulic cylinder part for pushing a tapered sleeve inserted into a ring roll into the ring roll, and a roll holding arm for hanging a lower end of the ring roll on an outer side of the hydraulic cylinder part so as to be openable and closable. A portable roll assembling jig pivotally attached so as to be position adjustable in the axial direction, a cross key inserted into a radial through hole formed at the shaft end of the roll shaft, the ring roll and the tapered sleeve. A taper sleeve pressing ring disposed on the outer periphery of the lower roll shaft end in contact with the upper surface of the tapered sleeve while being inserted into the roll shaft, and pressing the cross key against the tapered sleeve pressing ring And a tightening bolt screwed into the end of the roll shaft, and the taper sleeve pressing ring is mounted on the hydraulic cylinder of the portable roll mounting jig. Cantilever mill roll built device, characterized by being pressed against the tapered sleeve by the biasing of the. 2. An upper portion of a piston of the hydraulic cylinder portion is restrained by a one-touch thrust plug mounted on a shaft end of the roll shaft, and a lower end of the cylinder comes into contact with the tapered sleeve and the tapered sleeve pressing ring, thereby reducing the hydraulic pressure. The roll assembling device of the cantilever mill according to claim 1, wherein the pressing is performed by urging of the cylinder portion. 3. A shaft having a diameter larger than the shaft end small diameter portion following the shaft end small diameter portion.
From the roll shaft on which the tapered portion at one end is formed,
Is inserted through the tapered sleeve into the one end tapered portion of
Roll extraction device for cantilever mills to extract ring rolls
In, one end tape of the roll shaft and the ring roll
A roll holding arm for hanging a tapered sleeve press-fitted between the hydraulic cylinder and a hydraulic cylinder part for extracting the ring roll from the roll shaft, and a roll holding arm for hanging the lower end of the ring roll on the outer side of the hydraulic cylinder part. openably it has pivotally mounted portable roll sampling tool, the piston lower end of the hydraulic cylinder unit, with a gap between the upper end of the tapered sleeve is in the pressure input condition of the roll axis So that it comes into contact with the step surface between the one end taper portion and the shaft end small diameter portion.
Cage, the lower cylinder end of the hydraulic cylinder unit, to the front Symbol hook portion to the lower surface portion engages the upper flange portion of the taper sleeve is formed, the cylinder by the urging of the hydraulic cylinder unit is the roll axis A roll extracting device for a cantilever mill, wherein the roll is displaced within the range of the gap .