JP2000126806A - Device for changing roll of rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll changing device which does not require providing the device for changing rolls other than the operation side of a rolling mill and in which tracks for moving upper and lower work rolls are merely fixed inside the main body of the rolling mill, the structure of the whole device of which is simple and with which the manufacturing cost is reduced. SOLUTION: Wheels 7 are freely rotatably provided in the top end parts on both sides of both chocks 5a, 5b on the drive and operation sides of the upper work roll 5 and also the wheels 8 are freely rotatably provided in the bottom end parts of both sides of both chocks 6a, 6b on the drive and operation sides of the lower work roll 6. A rail 12 for the wheels on the side of the upper work roll 6 and a rail 11 for the wheels on the side of the lower work roll 9 are arranged inside the main body 1 of the rolling mill and also the end part on the operation side of the rail 12 is inclined upward toward the drive side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for rearranging upper and lower work rolls (work rolls) of a rolling mill, and more particularly, to an apparatus for passing a rolled sheet between upper and lower work rolls.
The present invention relates to a roll assembling apparatus capable of assembling work rolls in a so-called passing state.

[0002]

2. Description of the Related Art As this kind of roll changing apparatus, there is, for example, an apparatus described in Japanese Patent Application Laid-Open No. 58-138507.
In this device, a roll holding device is provided outside the driving side of the rolling mill main body, and the upper work roll is supported by the roll holding device until it passes through the plate to be rolled, and after passing, the upper work roll is supported by the spacer. It consists of a supporting structure. The roll holding device includes a hydraulic cylinder and wheels, and travels on rails fixed to a rolling stand via the wheels.

[0003]

However, the roll changing apparatus of the rolling mill described in the above publication has some points to be improved in the following points.

[0004] The upper and lower work rolls are pulled out to the operation side of the rolling mill. However, since a roll holding device for holding the upper work roll needs to be provided on the drive side of the rolling mill,
The whole device becomes complicated.

Since a spacer for supporting the upper work roll is provided through the lower work roll chock, and the spacer is vertically moved up and down to support and release the upper work roll, high-precision machining is performed. And assembly is required.

[0006] The overall structure of the roll changing device is complicated and the manufacturing cost is high. Also, since the roll holding device enters and exits a part of the rolling mill main body, the maintainability is poor, and the structure of the lower roll chock is complicated. The roll exchangeability at the roll shop is also poor.

The present invention has been made in view of the above points, and it is only necessary to provide a roll changing device only on the operation side of a rolling mill. It is an object of the present invention to provide a roll changing device that can simply fix the rolls, has a simple structure of the entire device, and can reduce the manufacturing cost.

[0008]

In order to achieve the above-mentioned object, a roll changer for a rolling mill according to the present invention comprises: a) a new work roll in which upper and lower work rolls are passed through a plate material between both rolls; In a roll changing device for a rolling mill that can be recombined with a work roll, b) a driving side of the upper work roll;
Wheels are rotatably provided at both upper ends of both operation side chocks, and wheels are rotatably provided at both lower ends of both drive side and operation side chocks of the lower work roll. C) The upper work roll side A traveling track for wheels and a traveling track for the lower work roll-side wheels are disposed in the rolling mill main body, and the operation side end of the traveling track for the upper work roll-side wheels is inclined upward to the drive side. D) holding the upper work roll holder upwardly on the upper surface of both the drive side and operation side chocks of the lower work roll, and preventing the height of the drive side holder from interfering with the plate material to be rolled. Lower than the operating side holding tool, and each holding tool can be fitted into the lower surface of both the driving side and operating side chocks of the upper work roll in correspondence with the positions of the operating side holding tool and the driving side holding tool. Create a recess e) The traveling track of the lower work roll side wheel is extended outwardly of the operation side of the rolling mill body and provided on the extended track at the lower ends on both sides of both the drive side and the operation side chock of the replacement lower work roll. Place the wheels so that they can travel,
An upper work roll for replacement is held on the lower work roll by displacing the positions of the recesses and the holders in the roll axis direction and tilting slightly downward to the drive side via the holders, f In this state, the replacement upper and lower work rolls are pushed into the rolling mill main body along the extended track, whereby the replacement upper work roll is replaced with the running track of the upper work roll side wheel in the rolling mill body. After the lower work roll is moved to a predetermined position in the rolling mill main body along the traveling track of the lower work roll side wheel in the rolling mill body, the replacement upper work roll is placed on the replacement lower work roll. The holding tool on the upper surface of the lower work roll chock is fitted into the recess on the lower surface of the upper work roll chock by relatively moving in the roll axis direction.

According to the roll assembling apparatus of the present invention having the above-described configuration, an upper track (a pair of front and rear rails) and a lower track (a pair of front and rear rails) for work rolls are provided in a rolling mill body. The members installed in the rolling mill have a simple structure and are minimized, and do not easily interfere with the rolled sheet material passing through the rolling mill, which hinders the rolling operation. Nothing. Further, since the member to be installed is a track, no maintenance is required, and a holder (spacer) for supporting the upper work roll is required as in the conventional apparatus described in the above-mentioned publication. It is made of a member, is fixed on the top surface of the chock, and has no moving parts. Therefore, it is easy to manufacture, the cost is low, there is no failure, and almost no maintenance is required. Further, no mechanism for changing the rolls is required on the driving side of the rolling mill body, and the structure of the entire apparatus is simple.

[0010] As set forth in claim 2, g) a track is provided outside the operation side of the rolling mill body, and a roll-rearrangement trolley is movably mounted on the track, and h) the roll-rearrangement is performed. A track is laid on a trolley so as to be connectable to the running track of the lower work roll side wheel, and a work roll pushing / pulling mechanism having a clamp mechanism for each of the upper and lower work rolls and the upper work are provided on the track. It is preferable that an auxiliary carriage provided with a mechanism for raising and lowering the roll end is provided so as to be able to travel.

[0011] According to a second aspect of the present invention, there is provided a roll changing apparatus.
The work roll push-in / pull-out mechanism and the upper work roll end lifting / lowering mechanism having the clamp mechanism disposed on the auxiliary carriage can be, for example, a simple and small lever mechanism and a slide mechanism driven by a cylinder. The structure of each mechanism can be simplified and miniaturized, the manufacturing cost is low, and since each mechanism is located outside the rolling mill, that is, off-line, it is excellent in maintainability.

According to a third aspect of the present invention, i) another pair of tracks having the same width is provided in a direction orthogonal to a track at a position where the replacement upper and lower work rolls on the roll changing cart stand by. It is preferable that the orbits are interchangeable.

According to a third aspect of the present invention, there is provided a roll changing apparatus.
Simply replace the upper and lower work rolls on the empty track in two stages and place them on the other. All new and old work rolls are replaced automatically, and the old work rolls are automatically placed on the empty track. Will be collected.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a roll changing device for a rolling mill according to the present invention will be described below with reference to the drawings.

FIG. 1 is an overall schematic side view showing an embodiment of a roll changing apparatus according to the present invention, FIG. 2 is an enlarged side view of the roll changing cart shown in FIG. 1, and FIG. It is a top view showing a truck.

As shown in FIG. 1, upper and lower work rolls 3 and 4 immediately before replacement are present in the housing 2 of the rolling mill main body 1 in a state where the plate material A to be rolled is passed. Above and below the upper and lower work rolls 3 and 4, an upper backup roll 43 and a lower backup roll 44 are rotatably arranged via left and right upper chock 45 and left and right lower chock 46, respectively. Work rolls 5 and 6 for replacement (new) are stacked one above the other on a roll changing cart 10 outside the operation side of the rolling mill body 1.
The work rolls 5 and 6 include operation-side chock 5a and 6a and drive-side chock 5b and 6b. Wheels 7 are rotatably supported at upper ends on both sides of the chocks 5a and 5b at both ends of the upper work roll 5, respectively. A pair of left and right wheels 8.8 are rotatably supported at lower ends on both sides of the chocks 6a and 6b at both ends of the lower work roll 6, respectively. A pair of rails 9.9 are laid on both front and rear sides of the roll assembling trolley 10, and a lower work roll 6 is mounted on these rails 9.9 via wheels 8 so as to be able to travel in the left-right direction. The upper and lower work rolls 3 and 4 have the same structure as the work rolls 5 and 6, and the left and right chocks 3a and 4a
The upper chock 3a is provided with wheels 7 at the upper ends on both sides, and the lower chock 4a is provided with a pair of wheels 8.8 at the lower ends on both sides.

Further, the rails 9
A pair of rails 11 that can run on the wheels 8.8 of the lower work roll 4 are laid in the extension direction of the pair 9, and a pair of rails 12. 12 are provided. Each rail 12
The operation side (left side) end is formed in a tapered portion 12a that is gradually inclined downward toward the left end, and this tapered portion 12a
Others extend horizontally in parallel with the rail 11.

Lower work roll 6 and lower work roll 4
The upper work roll 5 or the holder 13 of the upper work roll 3 projects upward from the upper surface of the operation side chocks 6a and 4a, and the lower work roll 6 and the lower work roll 4
The holder 14 of the upper work roll 5 or the upper work roll 3 is projected upward on the upper surface of the drive side chock 6b.
Is higher. This is to prevent the drive side holder 14 from interfering (contact) with the plate material A when the lower work roll 6 or the lower work roll 4 travels on the rail 11 in the rolling mill main body 1. On the other hand, the operation side chocks 5a and 3a of the upper work roll 5 and the lower work roll 3
a at the position corresponding to the holder 13,
A recess 15 (see FIG. 2) into which the holding tool 14 can be fitted is formed, and the holding tool 14 can be fitted at a position corresponding to the holding tool 14 on the lower surface of the drive side chock 5 b of the upper work roll 5 and the lower work roll 3. The recess 16 is formed.

As shown in FIGS. 2 and 3, the rails 9.9 on the front and rear sides of the roll changeable trolley 10 are laid almost over the entire length of the trolley 10, and are disposed on the operation side end of the rails 9.9. An auxiliary trolley 17 is mounted so as to be able to travel via wheels 19, 19, and a vertical drive motor 18 is disposed on the operation side end of the auxiliary trolley 17, and the auxiliary trolley 17 is a vertical drive motor 18
Can be self-propelled. An upper and lower two-stage frame 20 is erected on the driving side of the auxiliary trolley 17, and an L-shaped hook (clamp) is attached to a lower stage 20L of the frame 20.
The base end of the hydraulic cylinder 22 is pivotally connected in the vertical direction, the distal end of the piston rod of the hydraulic cylinder 22 is connected to the hook 21, and the hook 21 rotates in the vertical direction by the reciprocating operation of the piston rod. It engages with or releases the engagement with the locking portion 6c provided at the operation side end. In addition,
The L-shaped hook 21 and the hydraulic cylinder 22 constitute a clamp mechanism.

The operating side end of a hydraulic cylinder 25 is pivotally connected to the upper stage 20U of the frame 20.
Pedestal 26 connected to the tip of piston rod 25a
Are slidably disposed in the left-right direction. The base end of an L-shaped hook 23 (clamp) is rotatably mounted on the drive-side end of the pedestal 26 in a vertically rotatable manner, and the distal end of a piston rod of a hydraulic cylinder 24 supported on the pedestal 26 is connected to the hook 23. Then, the hook 23 rotates in the vertical direction by the reciprocating operation of the piston rod, and engages or disengages with the locking portion 5c provided on the operation side end of the upper work roll 5, and the hydraulic cylinder 25 The pedestal 26 advances and retreats in the left-right direction by the advance and retreat operation of the piston rod 25a. The clamp mechanism is also constituted by the L-shaped hook 23 and the hydraulic cylinder 24. Further, a bent portion of a substantially L-shaped elevating link 27 is rotatably supported in the vicinity of the upper bottom surface of the frame 20 so as to be rotatable in a vertical direction, and a piston of a hydraulic cylinder 28 whose driving end is pivotally attached to the upper bottom surface. The distal end of the rod 28a is connected to the proximal end of the lifting link 27, and the piston rod 28
The elevating link 27 rotates in the up and down direction by the advancing and retreating operation a. Thereby, the operation side end of the upper work roll 5 is moved up and down.

As shown in FIG. 1, a pair of front and rear rails 30 of the roll changing cart 10 are disposed outside the operation side of the rolling mill body 1 in the direction in which the central axis of the lower backup roll 44 extends. I have. On these rails 30, the roll-assembly trolley 10 is mounted so as to be able to travel by a pair of left and right wheels 32, 33, and is driven by a horizontal drive motor 31 mounted on the operation side end of the roll-assembly trolley 10. The wheels 32 are driven to rotate, and the roll change trolley 10 is moved to the rails 30.
Run on the top. In addition, between the left and right wheels 32 and 33 of the roll changing cart 10, a part 9a
a are separated. Another pair of rails 38, 38 having the same length and the same interval as the rails 9a, 9a are arranged on the common base 34 together with the rails 9a, 9a in a direction orthogonal to the axial direction. . Roll transfer cart 1
A plurality of guide rails 36 are laid on the lower surface and the side surfaces of the base 34 in a direction perpendicular to the axial direction thereof, and the base 34 is guided along the guide rails 36 via guide wheels 37 which are rotatably mounted on the frame 35. It is configured to be movable. Reference numeral 37a in FIG. 1 denotes a driving guide wheel. The length of the rails 9a and 9a and the other pair of rails (not shown) is such that the pair of left and right wheels 8.8 of the chocks 6a and 6b at both ends of the lower work roll 6 as shown in FIG. The length is set so that it can be placed with a margin.

FIG. 4 is a side sectional view showing a part of the rolling mill body 1 as viewed from the side. As shown in the drawing, an upper backup roll 43 and a chock 46 are integrally disposed above and below the upper and lower work rolls 5 and 6, respectively. The roll chock 45 is held at a fixed position by a hydraulic cylinder 49. The engagement grooves 5 are provided on both sides of the chocks 5a and 5b of the upper work roll 5.
d are engagement grooves 6d on both sides of the chocks 6a and 6b with the lower work roll 6, respectively.
It is formed over the entire length along the axial direction of 5b, 6a, 6b. On the other hand, a hydraulic cylinder having a cylinder-side block 47b and a rod-side block 47c that are openably and closably connected via piston rods 47a on both sides of the chocks 5a and 5b and on both sides of the chocks 6a and 6b with the lower work roll 6. Opening / closing mechanisms 47 are provided, respectively.
Protrusions 47d and 47e are protruded in the axial direction of the cylinder-side main body 47b and the rod-side main body 47c. On the rail 11 in FIG. 4, the chocks 6 of the lower work roll 6 are in a non-rolled state.
The wheels 8a and 6b are placed, and the wheels 8 float up from the rails 11 in a rolling state. Further, the rails 12 of the wheels 7 of the chocks 5a and 5b of the upper work roll 5 are cut off in front of the driving side and are not shown in the drawing. FIG.
The left half shows the non-rolled state (upper roll change), and the right half shows the rolled state.

As described above, the roll changing device according to the embodiment of the present invention is configured. Next, the work roll changing operation by the roll changing device of the present embodiment will be described with reference to FIG.
It will be described based on.

Upper and lower work rolls 3 in rolling mill body 1
4. To remove 4, the empty rails 38, 38 are moved onto the roll changing carriage 10 with the upper and lower backup rolls 43, 44 separated upward or downward as shown in the left half of FIG. At the same time, the new upper and lower work rolls 5 and 6 for replacement are placed on the rails 9a and 9a adjacent to the rails 38 and 38 in the orthogonal direction.
Then, after moving the roll assembling trolley 10 to the right end (the operation side of the rolling mill main body 1) along the rails 30 and 30,
That is, in the state of FIG. 1, the auxiliary cart 17 is moved to the rails 9.9 (partially the rails 38, 38) on the roll changing cart 10.
To the right end (the operating side of the rolling mill body 1).

Upper L-shaped hook 2 on auxiliary trolley 17
3 is rotated downward to engage with the locking portion 3c at the left end of the upper work roll 3, and
Is lifted by the lifting link 27. In this state, the holders 13 and 14 fall out of the recesses 15 and 16 downward. Then, by pulling the upper work roll 3 to the left by the L-shaped hook 23 together with the pedestal 26 by the hydraulic cylinder 25, the position of the upper work roll 3 shifts to the left with respect to the lower work roll 4, and the recesses 15 and 16 The positions of the holders 13 and 14 are shifted left and right. Here, hook 21
Is rotated downward to engage with the locking portion 4c at the left end of the lower work roll 4, and the lifting link 27 is lowered to stop lifting the left end of the upper work roll 3. In this state, the auxiliary trolley 17 is moved to the rail 9 on the roll changing trolley 10.
Move it to the left end (the operation side of the rolling mill body 1) along 9 (partially rails 38). At this time, the position of the upper work roll 3 is such that the lower work roll 4 travels on the rail 11 via the wheel 8, and at the same time, the upper work roll 3 travels on the rail 12 via the wheel 7.

Since the left end of the upper work roll 3 is lifted by the elevating link 27, the left end does not descend along the tapered portion 12a of the rail 12, remains parallel, and the upper work roll 3 After being completely pulled out, the lifting link 27 is lowered to be held in the holder 13 and supported. When the upper and lower work rolls 3 and 4 are completely pulled out to the operation side along the rails 11 and 12 in this manner, the holding tool 13 of the operation side chock 4a of the lower work roll 4 and the short holding of the drive side chock are held. The tool 14 supports the operation-side chock 3a and the drive-side chock of the upper work roll 3 in a downward-sloping state. In this state, the auxiliary carriage 17 is mounted on the rails 9
At the same time as moving to the left end, the roll changing cart 10 moves to the left end on the rails 30. Before being pulled out, the plate material A to be rolled exists between the upper and lower work rolls 3 and 4 in the rolling mill main body 1. Since it is set lower than the position, there is no interference when pulling out or pushing.

When the old upper and lower work rolls 3 and 4 in the rolling mill main body 1 are completely pulled out and placed on the rails 38 and 38, the upper and lower hooks 21 and 23 are rotated upward and locked. After the engagement with the parts 3c and 4c is released (see the two-dot chain line diagram at the left end in FIG. 1), the auxiliary carriage 17 is assembled to the left, and the rails 38 slide in the orthogonal direction to be replaced. Rails 9a and 9a on which new upper and lower work rolls 5 and 6 are stacked and movably mounted via wheels 8.8
Are arranged in front of the rolling mill body 1.

Then, the auxiliary carriage 17 moves forward to the right, rotates the tip of the upper L-shaped hook 23 downward,
The upper work roll 5 is engaged with the left end engaging portion 5c, and the tip of the lower L-shaped hook 21 is rotated downward to engage with the left end engaging portion 6c of the upper work roll 6. The lifting link 27 is raised, and the upper work roll 3 is lifted. In this state, the roll changeable trolley 10 is
It is advanced toward the rolling mill main body 1 as shown in FIG. Subsequently, the auxiliary trolley 17 is advanced to the rolling mill main body 1 side, so that the work rolls 5 stacked in two upper and lower stages along the rails 9.9 on the roll assembling trolley 10 via the holders 13 and 14. 6 is pushed into the rolling mill body 1 by the lower wheels 8.8. When inserted into the rolling mill main body 1, the lower work roll 6 travels on the rail 11 via the wheels 8.8 to the drive side, and the upper work roll 5 moves along the taper portion 12a via the wheels 7. It moves upward and travels on the rail 12 to the drive side. At this time, the rolled sheet material A
Exists in the rolling mill main body 1 (so-called plate state or threading state), but the upper work roll 5 moves just above the plate material A to be rolled, and the lower work roll 6 moves to the plate material A
Of the drive side chock while moving
4 moves so as not to interfere immediately below the plate material A to be rolled.

The lower work roll 6 is placed on the rail 11
Further, with the upper work rolls 5 placed on the rails 12 and completely accommodated in the rolling mill main body 1, the piston of the hydraulic cylinder 25 is lifted while the left end of the upper work roll 5 is lifted by the lifting link 27. The rod 25a is advanced, and the position of the upper work roll 5 is moved to the right side of the figure with respect to the lower work roll 6, so that the holders 13 and 14 and the recesses 15 and
Adjust the position of 16. Then, while lowering the elevating link 27, the upper and lower hooks 21 and 23 are rotated upward to release the engagement with the locking portions 5c and 6c,
7 is moved to the left end, and at the same time, the roll changing cart 10 is moved to the left end to stand by.

In this state, as shown in the left half of FIG. 4, the engagement grooves 5 d on both sides of the chocks 5 a and 5 b of the upper work roll 5 and the engagement grooves 6 d on both sides of the chocks 6 a and 6 b of the lower work roll 6 are formed. When the upper and lower work rolls 5 and 6 are pushed into the rolling mill main body 1, they move in the axial direction while fitting along the upper and lower protrusions 47a and 47b of the opening / closing mechanism 47 in the open (separated) state. The upper backup roll 43 and the upper work roll 5 and the lower backup roll 44 and the upper work roll 6 are closed with the opening and closing mechanism 47 approaching each other in the vertical direction about the plate material A to be rolled (FIG. 4).
Right half). As a result, the new upper and lower work rolls 5 and 6 that have been exchanged sandwich the plate material A to be rolled, and the plate material A is rolled down via the upper and lower backup rolls 43 and 44, and a rolling operation state is established.

Although the embodiment of the roll changing apparatus according to the present invention has been described above, the present invention can be implemented as follows.

A) The rails 9a on the roll changing cart 10
The structure can be simplified by omitting the shift mechanism in the orthogonal direction 9a.

B) Although the traveling rail 9 of the auxiliary trolley 17 and the transport rail 9 of the lower work roll 6 are common, the auxiliary trolley 17 may be moved by screw feed by rotation of a screw shaft.

[0034]

As is apparent from the above description,
The roll changing device for a rolling mill according to the present invention has the following excellent effects.

(1) The apparatus according to claim 1, wherein an upper track (a pair of front and rear rails, etc.) for a work roll is provided in a rolling mill body.
And the lower track (a pair of front and rear rails) only need to be fixed, so that the members installed in the rolling mill have a simple and minimal structure, and the rolling material passing through the rolling mill interferes. It does not hinder rolling work. Also, since only the track is used, no maintenance is required.
Also, a holder (spacer) for supporting the upper work roll is required as in the conventional apparatus, but it is made of a member having a simple shape, is fixed to the upper surface of the chock, and has no movable parts. It is inexpensive, has no failures, and requires little maintenance. Further, no mechanism for changing the rolls is required on the driving side of the rolling mill body, and the structure of the entire apparatus is simple.

(2) In the apparatus according to the second aspect, the work roll pushing / pulling-out mechanism and the lifting / lowering mechanism at the end of the upper work roll having a clamp mechanism provided on the auxiliary carriage are provided with a simple and small-sized by, for example, cylinder drive. Lever mechanism and slide mechanism can be adopted, so the structure of each mechanism can be simplified and downsized, the manufacturing cost is low, and since each mechanism is located off-line outside the rolling mill, maintenance is easy. Are better.

(3) In the apparatus according to the third aspect, only the upper and lower work rolls for replacement are stacked and placed in two stages on an empty track, and the replacement of the new and old work rolls is automatically performed thereafter. This is performed in a short time, and the old work roll is automatically collected on an empty track.

[Brief description of the drawings]

FIG. 1 is an overall schematic side view showing an embodiment of a roll changing apparatus according to the present invention.

FIG. 2 is an enlarged side view showing the roll changing cart of FIG. 1;

FIG. 3 is a plan view showing the roll changing cart of FIG. 2;

FIG. 4 is a side sectional view showing a part of the rolling mill main body as viewed from the side in a sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolling machine main body 2 Housing 3.5 Upper work roll 4.6 Lower work roll 3a / 4a / 5a / 5b / 6a / 6b Chock 7,8,32,33 Wheel 9,9a, 11,12,30,38 Rail (Track) 10 Roll changeable trolley 13.14 Holder 15.16 Concave 17 Auxiliary trolley

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[Procedure amendment]

[Submission date] November 30, 1999 (1999.11.
30)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

In order to achieve the above-mentioned object, a roll changer for a rolling mill according to the present invention comprises: a) a new work roll in which upper and lower work rolls are passed through a plate material between both rolls; In a roll changing device for a rolling mill that can be recombined with a work roll, b) a driving side of the upper work roll;
Wheels are rotatably provided at both upper ends of both operation side chocks, and wheels are rotatably provided at both lower ends of both drive side and operation side chocks of the lower work roll. C) The upper work roll side A traveling track for wheels and a traveling track for the lower work roll-side wheels are disposed in the rolling mill main body, and the operation side end of the traveling track for the upper work roll-side wheels is inclined upward to the drive side. D) holding the upper work roll holder upwardly on the upper surface of both the drive side and operation side chocks of the lower work roll, and preventing the height of the drive side holder from interfering with the plate material to be rolled. Lower than the operating side holding tool, and each holding tool can be fitted into the lower surface of both the driving side and operating side chocks of the upper work roll in correspondence with the positions of the operating side holding tool and the driving side holding tool. Create a recess e) The traveling track of the lower work roll side wheel is extended outwardly of the operation side of the rolling mill body and provided on the extended track at the lower ends on both sides of both the drive side and the operation side chock of the replacement lower work roll. Place the wheels so that they can travel,
An upper work roll for replacement is held on the lower work roll by displacing the positions of the recesses and the holders in the roll axis direction and tilting slightly downward to the drive side via the holders, f In this state, the replacement upper and lower work rolls are pushed into the rolling mill main body along the extended track, whereby the replacement upper work roll is moved along the traveling track of the upper work roll side wheels in the rolling mill main body. , Replacement lower work roll
After moving along the travel trajectory of the lower work roll side wheels of the rolling mill within the body to a predetermined position of each rolling mill body, and on the work roll in the roll axial direction for replacement to replacement under a work roll By moving relatively,
Position of each holder on the upper surface of the replacement lower work roll chock
Corresponding lower surface on the work roll chocks for said exchange location
It is characterized in that it is adjusted to the position of the recess .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

Upper L-shaped hook 2 on auxiliary trolley 17
3 is rotated downward to engage with the locking portion 3c at the left end of the upper work roll 3, and
The left end Ru lifted by the lifting link 27. Its to,
L-shaped hook 2 with base 26 by hydraulic cylinder 25
By pulling the upper work roll 3 to the left by 3, the position of the upper work roll 3 shifts to the left with respect to the lower work roll 4, and the positions of the recesses 15 and 16 and the holders 13 and 14 shift to the left and right. Here, the tip of the hook 21 is rotated downward to engage the left end of the engaging portion 4c of the lower work roll 4, in this state, the auxiliary carriages 17 roll changing set bogie 1
It is moved to the left end (the operating side of the rolling mill body 1) along the rails 9.9 (partially the rails 38, 38) on the zero. This and
At this time , the lower work roll 4 travels on the rail 11 via the wheel 8, and at the same time, the upper work roll 3 travels on the rail 12 via the wheel 7.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0027

[Correction method] Change

[Correction contents]

When the old upper and lower work rolls 3 and 4 in the rolling mill main body 1 are completely pulled out and placed on the rails 38 and 38, the upper and lower hooks 21 and 23 are rotated upward and locked. After the engagement with the portions 3c and 4c is released (see the two-dot chain line diagram at the left end in FIG. 1), the auxiliary carriage 17 retreats to the left, and the rails 38 slide in the orthogonal direction, and are replaced. Rails 9a and 9a on which new upper and lower work rolls 5 and 6 are stacked and movably mounted via wheels 8.8
Are arranged in front of the rolling mill body 1.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

In this state, as shown in the left half of FIG. 4, the engagement grooves 5 d on both sides of the chocks 5 a and 5 b of the upper work roll 5 and the engagement grooves 6 d on both sides of the chocks 6 a and 6 b of the lower work roll 6 are formed. When the upper and lower work rolls 5 and 6 are pushed into the rolling mill main body 1, they move in the axial direction while fitting along the upper and lower protrusions 47a and 47b of the opening / closing mechanism 47 in the open (separated) state. The upper backup roll 43 and the upper work roll 5 and the lower backup roll 44 and the lower work roll 6 are closed with the opening / closing mechanism 47 approaching each other in the vertical direction about the plate material A to be rolled (FIG. 4).
Right half). As a result, the new upper and lower work rolls 5 and 6 that have been exchanged sandwich the plate material A to be rolled, and the plate material A is rolled down via the upper and lower backup rolls 43 and 44, and a rolling operation state is established. ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 15, 2000 (2000.2.1
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

In order to achieve the above-mentioned object, a roll changer for a rolling mill according to the present invention comprises: a) a new work roll in which upper and lower work rolls are passed through a plate material between both rolls; In a roll changing device for a rolling mill that can be recombined with a work roll, b) a driving side of the upper work roll;
Wheels are rotatably provided at both upper ends of both operation side chocks, and wheels are rotatably provided at both lower ends of both drive side and operation side chocks of the lower work roll. C) The upper work roll side A traveling track for wheels and a traveling track for the lower work roll-side wheels are disposed in the rolling mill main body, and the operation side end of the traveling track for the upper work roll-side wheels is inclined upward to the drive side. And d) holding the upper work roll holder upwardly on the upper surface of both the drive side and operation side chocks of the lower work roll so that the height of the drive side holder does not interfere with the rolled sheet material. Lower than the operating side holding tool, and each holding tool can be fitted into the lower surface of both the driving side and operating side chocks of the upper work roll in correspondence with the positions of the operating side holding tool and the driving side holding tool. Create a recess e) The traveling track of the lower work roll side wheel is extended outwardly of the operation side of the rolling mill body and provided on the extended track at the lower ends on both sides of both the drive side and the operation side chock of the replacement lower work roll. Place the wheels so that they can travel,
On the lower work roll, the replacement upper work roll is displaced in the roll axis direction between the recesses and the holders, and is held by being slightly inclined downward to the drive side via the holders, f In this state, the replacement upper and lower work rolls are pushed along the extended track into the rolling mill main body, whereby the replacement upper work roll is moved along the traveling track of the upper work roll side wheels in the rolling mill body. , Replacement lower work roll
After moving along the travel trajectory of the lower work roll side wheels of the rolling mill within the body to a predetermined position of each rolling mill body, and on the work roll in the roll axial direction for replacement to replacement under a work roll By moving relatively,
Operation side holder on the upper surface of the replacement lower work roll chock
Was fitted into the upper work roll chocks lower surface of the recess
It is characterized in that that.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

Upper L-shaped hook 2 on auxiliary trolley 17
3 is rotated downward to engage with the locking portion 3c at the left end of the upper work roll 3, and
Is lifted by the lifting link 27. In this state, the holder 13 comes out of the recess 15 downward. Then, by pulling the upper work roll 3 to the left by the L-shaped hook 23 together with the pedestal 26 by the hydraulic cylinder 25, the position of the upper work roll 3 shifts to the left with respect to the lower work roll 4, and the recesses 15 and 16 Holders 13 and 14
Is shifted left and right. Here, the tip of the hook 21 is rotated downward, and the locking portion 4c at the left end of the lower work roll 4 is rotated.
Engaged with the movement, in this state, the left end of the auxiliary carriages 17 rail 9.9 on the carriage 10 roll changing set (some rail 38, 38) along the (operating side of the rolling machine main body 1) Let it. This and can, lower work roll 4 via the wheel 8 rail 11
The upper work roll 3 travels on the rail 12 via the wheels 7 at the same time.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0027

[Correction method] Change

[Correction contents]

When the old upper and lower work rolls 3 and 4 in the rolling mill main body 1 are completely pulled out and placed on the rails 38 and 38, the upper and lower hooks 21 and 23 are rotated upward and locked. After the engagement with the portions 3c and 4c is released (see the two-dot chain line diagram at the left end in FIG. 1), the auxiliary carriage 17 retreats to the left, and the rails 38 slide in the orthogonal direction, and are replaced. Rails 9a and 9a on which new upper and lower work rolls 5 and 6 are stacked and movably mounted via wheels 8.8
Are arranged in front of the rolling mill body 1.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

In this state, as shown in the left half of FIG. 4, the engagement grooves 5 d on both sides of the chocks 5 a and 5 b of the upper work roll 5 and the engagement grooves 6 d on both sides of the chocks 6 a and 6 b of the lower work roll 6 are formed. When the upper and lower work rolls 5 and 6 are pushed into the rolling mill main body 1, they move in the axial direction while fitting along the upper and lower protrusions 47a and 47b of the opening / closing mechanism 47 in the open (separated) state. The upper backup roll 43 and the upper work roll 5 and the lower backup roll 44 and the lower work roll 6 are closed with the opening / closing mechanism 47 approaching each other in the vertical direction about the plate material A to be rolled (FIG. 4).
Right half). As a result, the new upper and lower work rolls 5 and 6 that have been exchanged sandwich the plate material A to be rolled, and the plate material A is rolled down via the upper and lower backup rolls 43 and 44, and a rolling operation state is established.

Claims (3)

[Claims] 1. A roll changing device for a rolling mill, wherein upper and lower work rolls can be replaced with a new work roll in a state where a plate material to be rolled is passed between the two rolls. Wheels are rotatably provided at upper ends on both sides of the lower work roll, and wheels are rotatably provided at lower ends on both sides of both the drive side and the operation side chock of the lower work roll. The traveling track of the lower work roll side wheel is disposed in the rolling mill body, and the operation side end of the traveling track of the upper work roll side wheel is inclined upward to the drive side, and the lower work roll The holder for the upper work roll is projected upward on the upper surfaces of both the drive side and the operation side chock, and the height of the drive side holder is adjusted so that the height of the drive side holder does not interfere with the plate material to be rolled. Lower than the holding tool, and provided on the lower surface of both the drive side and the operation side chock of the upper work roll, a recess in which each holding tool can be fitted corresponding to the position of the operation side holding tool and the driving side holding tool. The running track of the lower work roll side wheel is extended outwardly on the operation side of the rolling mill main body, and provided on both lower ends of both the drive side and the operation side chock of the replacement lower work roll on the extended track. Wheels are mounted so that they can travel, and the replacement upper work roll is displaced on the lower work roll in the roll axis direction between the recesses and the holders, and is slightly moved to the drive side via the holders. In this state, the replacement upper work roll is pushed into the rolling mill main body along the extended track to hold the replacement upper work roll in the upper work roll side wheel in the rolling mill main body. On the running track, under the replacement The crawl is moved to a predetermined position in the rolling mill main body along each of the traveling trajectories of the lower work roll side wheels in the rolling mill main body, and then the replacement upper work roll is rolled in the roll axial direction on the replacement lower work roll. A holder for the upper surface of the lower work roll chock is fitted into a recess of the lower surface of the upper work roll chock by moving the roll relative to the upper work roll chock. 2. A track is provided outside the operation side of the rolling mill main body, and a roll-changing carriage is movably mounted on the track, and the lower work roll-side wheels travel on the roll-changing carriage. An auxiliary bogie provided with a track that can be connected to a work track and provided with a work roll push-in / pull-out mechanism having a clamp mechanism for each of the upper and lower work rolls, and an upper work roll end raising / lowering mechanism on the track. The roll changing device for a rolling mill according to claim 1, wherein the roll changing device is arranged so as to be able to run. 3. A pair of tracks having another same width are provided in a direction orthogonal to a track at a position where the upper and lower work rolls for replacement on the roll changing cart stand by, and the tracks are interchangeable with each other. The roll changing device for a rolling mill according to claim 1 or 2, wherein