WO2009157542A1

WO2009157542A1 - Shape forming device

Info

Publication number: WO2009157542A1
Application number: PCT/JP2009/061722
Authority: WO
Inventors: 剛之佐藤; 学二ノ宮; 毅志渡部
Original assignee: 株式会社中田製作所
Priority date: 2008-06-27
Filing date: 2009-06-26
Publication date: 2009-12-30

Abstract

Disclosed is a shape forming device which is made compact with a simple structure by not attaching a hydraulic actuator, or the like, for forming/breaking up a stacked body, to an inner frame or a roll stand in order to make it possible to draw out a stacked body of a roll chock/yoke in a direction intersecting the advancing direction of a product from a forming roll stand perpendicularly and to replace the stacked body, thereby allowing a roll to be replaced easily. An inner frame is arranged in a forming roll stand so as to be able to elevate/lower freely in order to accomplish the replacing. A machine mechanism is arranged between the opposing surface of each roll chock/yoke and the inner frame. After breaking connection with a screw down device, each roll chock/yoke is guided utilizing the lowering operation of the inner frame to form a stacked body sequentially so that the stacked body can be drawn out from the roll stand. The stacked body is broken up utilizing the elevating operation of the frame, and each roll chock/yoke is guided to a required position in the stand and connected with the screw down device.

Description

Molding equipment

The present invention, for example, is a molding apparatus having a configuration in which only a stacked body in which roll chocks and yokes for supporting each roll are placed in order on four molding roll stands is pulled out in the horizontal direction perpendicular to the product traveling direction and replaced. The inner frame is placed in the forming roll stand so that it can be raised and lowered, and the mechanical mechanism is placed on each roll chock / yoke and the inner frame facing surface to form, release, and position the stack in addition to raising and lowering the inner frame. The present invention relates to a molding apparatus having a simple configuration that does not require an actuator, such as a hydraulic cylinder, and an exchange operation method.

In ERW steel pipe mills that form tubes from strip-shaped steel sheets and universal rolling mills that form various cross-sectional shapes from strip-shaped materials, the frequency of replacing the forming rolls of each forming roll stand is high according to the product type and dimensions. In order to perform roll exchange easily and in a short time, various exchange apparatuses and methods have been proposed.

When replacing only the inner roll unit in cage forming, raise the inner roll unit from above the roll stand, and then pull it out in the material width direction perpendicular to the product traveling direction and replace it with a separately prepared inner roll unit. The replaced unit is returned to the roll stand in the reverse process to the previous one (Patent Document 1). The same can be done when replacing the upper roll unit of the tube welding roll stand (Patent Document 2).

In the case of a four-way roll stand such as an electric resistance steel pipe mill or a rolling mill, an inner stand equipped with a separately prepared four-way roll is arranged so that the inner stand equipped with the four-way roll can be moved up and down in the post of the roll stand. A method of exchanging both the stand and the inner stand has been put into practical use (Patent Document 3). However, it is necessary to attach almost all necessary equipment such as a jack as a rolling-down device similar to a normal roll stand to the inner stand, and there are many equipment possessions and storage places for multiple inner stands. Forced to invest.

Therefore, in the forming roll stand, the upper roll chock that pivotally supports the upper roll, the left and right side roll yokes that pivotally support the left and right side rolls, and the lower roll chock that pivotally supports the lower roll are sequentially stacked or pinned by mutual insertion. A configuration is proposed in which the stacks are assembled into roll chock stacks, which are pulled out in the horizontal direction perpendicular to the product traveling direction and replaced with separately prepared roll chock stacks (Patent Documents 4 and 5). .

JP 58-168441 A Japanese Patent No. 3938918 Japanese Patent Publication No.58-55846 Japanese Patent No. 3145480 Japanese Patent No. 3779839

Conventionally, a molding apparatus configured to insert, mount, detach, and unload from the vertical or horizontal direction with respect to the outer stand that fixes the inner stand on which the four molding rolls are mounted in the product advancing direction is any configuration. It is necessary to secure equipment costs and storage locations by preparing and storing multiple inner stands. In addition, both the inner and outer stands are indispensable for the inner stand and the outer stand, such as the lifting and lowering and pulling devices for attaching and detaching the inner stand, the position sensor that enables such attachment and detachment, and the stand locking device. The attaching / detaching operation is also complicated.

The roll chock stack that is configured to stack the roll chock and the yoke that supports the rolls by releasing the connection with the reduction device is required for the forming roll stand. It is not necessary to prepare a plurality of necessary equipment such as a rolling-down device like the inner stand described above, but a roll chock stacking body for stacking and transporting roll chock yokes can be formed, or conversely, a roll chock yoke can be attached to the roll stand. It is necessary to provide the roll stand with a hydraulic lifting / lowering device and an actuator for returning and locking the positioning, and not only the configuration of the detaching device but also the detaching operation is complicated.

This invention can be replaced by pulling out the stacked body of the structure that stacks only the roll chock and the yoke that supports the roll from the forming roll stand in the ERW steel pipe mill and universal rolling mill. When a simple configuration is adopted, it is possible to reduce the size and make it easy to change rolls without mounting hydraulic actuators to form and release roll chock stacks on the inner frame and roll stand. It aims at providing the shaping | molding apparatus which can be performed.

The inventors have adopted a simple structure as much as possible in the forming apparatus in which the stacked bodies obtained by sequentially stacking the roll chocks and yokes can be inserted and extracted in the horizontal direction perpendicular to the product traveling direction of the forming roll stand.・ Various studies have been made to eliminate the various actuators used to raise and lower the yoke, and the inner frame can be moved up and down inside the forming roll stand. The inner frame can be moved up and down to form a stack of roll chocks and yokes. And we focused on using it to cancel it.

As a result of intensive studies on the mechanical mechanism that uses the lifting operation of the inner frame, the inventors have adopted a structure that holds the inner frame and the inner frame in the forming roll stand so that the roll frame can be moved up and down. A mechanical mechanism is arranged on the required facing surface in advance, for example, after disconnecting from the reduction device, the roll chock and yoke are guided using the lowering operation of the inner frame to sequentially form stacked bodies and roll stands. To make it possible to pull out more, on the other hand, use the inner frame ascending action to release the stacking of the roll chocks and yokes, guide each roll chock and yoke to the required position in the stand, and then connect to the reduction device The placement and fixing can be carried out easily with the And knowledge to be able to omit an actuator for a constant, and have completed the present invention.

That is, the present invention inserts and ejects a stack of roll chocks and yokes from the forming roll stand in the horizontal direction perpendicular to the product traveling direction, and a forming roll stand having at least both sides of the roll chock yoke and the reduction device. In a molding apparatus having a replacement rail, the inner frame has an inner frame that can be moved up and down in a molding roll stand. A mechanical mechanism that enables the roll yoke to be guided to the required position in the stand and the formation / release of the stacked body, or, further, when the yoke is connected to or detached from the reduction device or the position of the yoke is adjusted. A molding apparatus comprising a mechanical mechanism that enables positioning or release. .

The present invention also includes a forming roll stand having upper and lower rolls and both side roll roll chocks and yokes, and a reduction device therefor, and a stack of roll chocks and yokes from the forming roll stand in the horizontal direction perpendicular to the product traveling direction. In a molding apparatus having a replacement rail that enables insertion and removal of the inner frame, the molding roll stand has an inner frame that can be moved up and down, and the inner frame has an inner frame on a required facing surface of each roll chock and yoke. When lifting and lowering, a mechanical mechanism that enables each roll chock / yoke to be guided to a required position in the stand and formation / release of a stacked body, or when connecting or disconnecting the yoke and the reduction device or adjusting its position Provided with a mechanical mechanism that enables positioning or release of the yoke. That is a molding apparatus.

In the present invention, an inner frame is installed upright in a forming roll stand so that it can be moved up and down, a mechanical mechanism with a simple configuration is arranged on each roll chock yoke and the inner frame facing surface, and the roll chock yoke is moved up and down by the inner frame. In addition to the actuator for raising and lowering the inner frame, it has been essential in the past by adopting a configuration that uses a mechanical mechanism that engages with the inner frame to form or release the stacked body and to position the side rolls. It is not necessary to provide actuators such as hydraulic cylinders used for forming and releasing stacked bodies, positioning roll chocks and yokes, etc., and there is no need for the actuator control and operation mechanisms when replacing rolls. A molding apparatus and a molding apparatus with a simple roll exchanging method can be obtained. .

In the present invention, the molding stand is composed of, for example, an outer frame and an inner frame, and the outer frame and the inner frame can be formed in a plate shape or a frame body. It is possible to adopt a simple structure such as engaging with the molding roll stand, and to achieve simplification and miniaturization of the entire forming roll stand. For example, the above-mentioned mechanical mechanism that can restrain the side roll yoke and the inner frame in the product line direction and the vertical and horizontal directions perpendicular to the product line direction is provided so that the load of the side roll is borne only on the inner frame. It is possible to design the structure so that the load of the upper and lower roll chock is applied to the outer frame.

It is perspective explanatory drawing which shows an example of the shaping | molding apparatus of the offline state which carried out the stacked body from the shaping | molding stand. FIG. 2 is an explanatory perspective view of the molding apparatus as seen from a direction different by 90 ° in the left-right direction in FIG. 1. FIG. 2 is an explanatory perspective view showing a positional relationship between the stacked body and the inner frame in FIG. 1. FIG. 5 is a perspective explanatory view showing only a mechanical mechanism provided on a facing surface between a front inner frame and a stacked body in a product traveling direction when a stacked body is inserted between a pair of inner frames that are lowered at the lowest. is there. It is perspective explanatory drawing which shows an example of the shaping | molding apparatus of the state which inserted the stacked body in the shaping | molding stand. It is perspective explanatory drawing which shows an example of the shaping | molding apparatus of the state which the inner frame went up and released | stacked after inserting the stacked body in the molding stand. It is explanatory drawing which shows operation | movement of the clamper of the spring action provided in the jack axis | shaft end of an upper jack, The right side from the centerline shows the time of clamping, and the left side shows the time of unclamping. It is explanatory drawing which shows operation | movement of the spring action | operation clamper provided in the joint part connected with the roll axis | shaft of an upper roll chock, The right side of a figure is the front view seen from the entrance side of the product advancing direction, The left side is a side view.

In the present invention, the forming roll stand includes a forming roll such as a three-way roll and a four-way roll, a roll chock yoke that pivotally supports the forming rolls, and a rolling reduction that is connected to the roll chock yoke to reduce the workpiece. If it is possible to provide the apparatus, any known configuration can be adopted in addition to the configuration formed by the plate-like inner frame shown in the embodiment and the rectangular frame outer frame that supports the inner frame.

Depending on the shape, size, and weight of each roll chock on the upper and lower sides and on both sides, the mounting method of the roll chock / yoke stacking structure is a contact contact between surfaces, fitting of pins and holes or rods and grooves, A configuration such as a combination of surface contact and a mechanical mechanism is appropriately selected. Also, any known configuration can be employed for connection between each roll chock / yoke and the reduction device.

As the outer frame, any known configuration such as a gate type and a face plate type can be adopted in addition to the pair of rectangular frames used in the embodiments.

The inner frame is not particularly limited in shape, such as a rectangular plate or octagonal face plate used in the embodiment, a light-weight notch or a stealing hole at a required portion of the face plate. . However, in the embodiment, depending on the engagement mechanism, when it is configured to receive all the load of the side roll yoke, it is preferable to appropriately select a shape and dimensions that can withstand the load. Any known mechanism such as a jack shown in the embodiment can be adopted as the lifting mechanism for the inner frame.

The mechanical mechanism provided on the opposite surface between the roll chock yoke and the inner frame is such that when the stack is inserted between a pair of inner frames and when the frame is raised, the frame and the side roll yoke or further upper and lower roll chocks Engages or abuts to position or guide to the required position in the stand, enabling the release of the stacking of each roll chock, and when the inner frame descends from the ascending fixed position, the frame and the side roll yoke or further up and down The contact or engagement with the roll chock is released, or the positioning from the required position in the stand is released, the upper roll chock is placed on the side roll yoke, and the side roll yoke is placed on the roll chock. Any mechanical mechanism that can form stacked bodies is shown in the examples. In addition any of the configurations of the groove fitting can also be employed.

As shown in the embodiment, the mechanical mechanism that enables the side roll yoke to be positioned or released from the inner frame at the time of connecting or releasing the side roll shaft and the reduction device or adjusting the position thereof is formed as described above. -In addition to the configuration that can be shared with the mechanical mechanism for release, a separate independent mechanism can be used.

Any known configuration can be adopted as a configuration in which a roll chock / yoke stack is formed by using the raising and lowering operation of the inner frame, and then is carried on the replacement rail to be carried in and out and replaced.

Example 1
1 and 2 are perspective explanatory views showing an example of a forming apparatus, showing an off-line state in which a roll chock / yoke stack 60 is unloaded from the forming roll stand 1 to the left side in the left-right direction in the figure. FIG. 3 is a drawing showing the positional relationship between the stacked body 60 and the

inner frames

5 and 5 in FIG. 1. As shown in the figure, the depth direction in the figure is called the product advancing direction, and the front side protrudes from the entry side. The right side in the left-right direction in the figure is called the drive side, and the left side in the left-right direction is called the operation side.

The stacked body 60 is formed by placing the side roll yokes 30 and 40 on the lower roll chock 20 and further placing the upper roll chock 10 thereon.

The forming roll stand 1 includes an outer frame 4 composed of a pair of

rectangular frames

3 and 3 and a pair of

inner frames

5 and 5 disposed therein. The outer frame 4 has a pair of

rectangular frames

3 and 3 arranged on the base 2 in parallel at predetermined intervals with the product traveling direction in between, and the long side direction of the

rectangular frames

3 and 3 is the vertical direction and the short side direction is the product. Consists of a configuration standing in the direction of travel. In addition, although not shown in figure, a pair of

rectangular frames

3 and 3 are suitably provided with the horizontal frame for mutually connecting by the upper-lower end part.

Inner frames

5 and 5 are formed of a pair of face plates that are opposed to each other at a predetermined interval in the product traveling direction. More specifically, the

inner frames

5 and 5 are arranged in a vertical plane orthogonal to the product traveling direction, that is, in the same vertical plane of the pair of

rectangular frames

3 and 3 Each long side inner surface portion is used as a rail, and each face plate is mounted so as to be movable up and down.

The face plates constituting the

inner frames

5 and 5 are provided with a circular hole through which the work material passes at the center of the substantially cross-shaped plate, and the upper and lower roll chocks 10 and 20 are arranged in the vertical direction on the vertical parts located on both sides of the circular hole. Rod-shaped

vertical guides

51 and 52 for guiding are provided, and the opposite surfaces abut against the inner surfaces of the long sides of the

rectangular frames

3 and 3, and the side surfaces of the long sides of the

rectangular frames

3 and 3 are at the ends of the vertical portions. An engaging portion 57 is provided to be fitted to the rail member 9 provided in the portion. On the other hand, a horizontal portion is formed in the horizontal direction of the circular hole, and a pair of

horizontal guides

53 and 54 in the horizontal direction for engaging with the side roll yokes 30 and 40 are provided in the horizontal portion, respectively. Yes.

On the base 2 in the outer frame 4,

vertical jacks

6, 6 are provided and are in contact with the lower end members of the

inner frames

5, 5 to hold the

inner frames

5, 5 so that they can be raised and lowered. .

Vertical frame upper and

lower jacks

7 and 8 are provided on the frame portions in the short side direction of the

rectangular frames

3 and 3 positioned above and below the outer frame 4. , 21 can be given a reduction force to the material to be molded.

A horizontal jack 32 connected to the right side roll yoke 30 and its drive source M are provided on the drive side of the horizontal portion of the

inner frames

5 and 5. The drive-side jack 32 is box-shaped and is disposed between the pair of

inner frames

5 and 5, so that it moves up and down together with the

inner frames

5 and 5.

The operation-side side roll yoke 40 is provided with a horizontal jack 42 connected thereto, and an elevating frame 45 is disposed outside the operation-side rectangular frame 3 so that the jack 42 can be moved up and down. It is supported by a lifting rod that engages and hangs down from the frame 45. That is, when the horizontal jack 42 on the operation side is raised, the pair of

inner frames

5 and 5 on the operation side is opened, and the stacked body 60 can be inserted and removed.

A replacement rail 61 that extends perpendicular to the product traveling direction and extends to the operation side is disposed below the face plates of the pair of

inner frames

5 and 5 in the vicinity of the lower jack 8.

In the roll chock / yoke stack 60, here, a pair of side roll yokes 30 and 40 are provided with four

pins

33 and 43 projecting at predetermined intervals on the upper and lower surfaces, respectively. And the fitting hole is provided in the required position of the upper surface of the lower roll chock 20, and stacking is completed by fitting the said pins 33 and 43 and a fitting hole at the time of stacking. Further, at the lower part of the lower roll chock 20, wheels for traveling on the replacement rail 61 are provided as the stacked body 60.

Although not shown, the conveyor is arranged so that the L-shaped engaging tool travels along the replacement rail 61 by chain driving, and the L-shaped engaging tool is provided on the driving side of the lower end of the lower roll chock 20. And the stacked body 60 can be moved in the rail direction. Although not shown, a table portion that can be moved in the orthogonal direction of the rail (product traveling direction) is provided at the operation side end of the replacement rail 61 so as to replace the separately prepared stack 60. Be placed.

The surface facing the

inner frames

5 and 5 of the stacked body 60 will be described. The guide surface 24 that comes into contact with the

vertical guides

51 and 52 provided on the vertical portions of the

inner frames

5 and 5 on the lower roll chock 20 and the upper roll chock 10. , 14 are provided, and vertical slider blocks 15, 25 project from the outer side of the operation side guide surfaces 24, 14.

The side roll yokes 30 and 40 are provided with

guide members

34 and 44 having a reverse horizontal L-shape and a required horizontal length that come into contact with a pair of short bar-shaped horizontal guides 53 and 54 provided on the horizontal portion of the

inner frames

5 and 5. Each is provided. A pair of locking blocks 35 and 45 are respectively provided below the

guide members

34 and 44 of the side roll yokes 30 and 40, and the inner frame is formed by the

guide members

34 and 44 and the locking blocks 35 and 45. A U-shaped concave section is formed in which the horizontal guides 53 and 54 provided in the fifth and fifth horizontal portions can be fitted.

The engagement state with the stacked body 60 when the

inner frames

5 and 5 are raised and lowered will be described with reference to FIGS. First, FIG. 3 shows a state in which the stacked body 60 is unloaded from between the pair of

inner frames

5, 5 that are lowest, as viewed from the entry side in the product traveling direction. Here, as shown in FIG. 5, when the stacked body 60 is inserted between the pair of

inner frames

5, 5 that are descending the lowest, the front inner frame 5 and the stacked body 60 face each other in the product traveling direction. FIG. 4 shows only the mechanical mechanism provided on the surface. The parts of the mechanical mechanism shown in FIG. 4 are provided with a hatched plane on the inner frame 5 side, and white parts are provided on the stacked body 60 side.

In the state in which the stacked body 60 shown in FIG. 5 is inserted, in each mechanical mechanism, the guide surfaces 24 and 14 of the lower roll chock 20 and the upper roll chock 10 are opposed to the

vertical guides

51 and 52 provided in the vertical portion of the inner frame 5. Further, the vertical slider blocks 14 and 24 of the upper and lower roll chocks 10 and 20 are arranged in parallel outside the

vertical guides

51 and 52 provided on the operation side of the

inner frames

5 and 5. Here, as shown in FIG. 3,

short bar members

55 and 56 are arranged in parallel on the

vertical guides

51 and 52 provided on the operation side of the

inner frames

5 and 5, and a guide groove is formed therebetween.

The

guide members

34 and 44 of the side roll yokes 30 and 40 and the locking blocks 35 and 45 are located above the horizontal guides 53 and 54 provided in the horizontal portion of the

inner frames

5 and 5.

FIG. 6 shows a state in which the

inner frames

5 and 5 are lifted and the stacking is released. However, the guide surfaces 24 and 14 of the upper and lower roll chocks 10 and 20 are in contact with the

vertical guides

51 and 52 of the

inner frames

5 and 5. When the

frames

5 and 5 are raised, the vertical slider blocks 15 and 25 are fitted in the guide grooves so as to be slidable in the vertical direction, so that the upper and lower roll chocks 10 and 20 are in a horizontal direction perpendicular to the product traveling direction. Is bound.

On the other hand, the horizontal guides 53, 54 provided on the

inner frames

5, 5 are each composed of a pair of short bar members, but when the

inner frames

5, 5 are lifted and come into contact with the

guide members

34, 44, the locking blocks 35, In order not to collide with 45, the locking blocks 35, 45 are arranged at intervals so that they can pass through. When the

inner frames

5, 5 are raised, the horizontal guides 53, 54 are fitted into U-shaped recesses between the

guide members

34, 44 of the side roll yokes 30, 40 and the locking blocks 35, 45 to mount the upper roll chock 10. The placed side roll yokes 30 and 40 can be raised to a required position.

When the

inner frames

5 and 5 are raised by the above-described mechanical mechanism, the stacked body 60 is eliminated, but the lower roll chock 20 is left as it is, and the side roll yokes 30 and 40 mount the upper roll chock 10 therefrom. The lower roll chock 20 and the upper roll chock 10 are restrained in the horizontal direction orthogonal to the product progression.

As shown in FIG. 5, the upper roll chock 10 and the upper jack 7 in the state where the stacked body 60 is inserted are such that the T-shaped member 16 provided on the upper surface of the chock 10 is in the fitting groove at the shaft tip portion of the jack 7. And is restrained in the product traveling direction.

Since the lever mechanism shown in FIG. 7 is arranged between the

inner frames

5 and 5 and the upper jack 7, the upper roll chock 10 is provided at the shaft tip of the upper jack when the

inner frames

5 and 5 are raised. Engages with a spring-operated clamper 70. The lower roll chock 20 is also engaged by the extension of the lower jack and moves upward to a required position. Therefore, the load of the upper and

lower roll chock

10, 20 is supported by the

rectangular frames

3, 3 of the outer frame 4.

On the other hand, the end of the jack shaft approaches the side roll yoke 30 on the driving side by the extension of the jack 32 before the

inner frames

5 and 5 are raised, and the jack shaft descends and extends to the side roll yoke 40 by the extension. The tips are close. As the

inner frames

5 and 5 are raised, the pins at the ends of the jack shafts are fitted into the U-shaped locking tools at the ends of the

yokes

30 and 40, respectively, and then the

jacks

32 and 42 are extended to the center side. By moving, the locking blocks 35 and 45 are also locked in the vertical direction so as to be separated from the gaps between the

horizontal guides

53 and 54, locked in the horizontal direction by the

jacks

32 and 42, and the product traveling direction is the pair of inner frames 5. , 5 and the

inner frame

5, 5 receives all the load.

6, a joint portion 81 for connecting the upper roll shaft 12, the lower roll shaft 22, and a drive shaft 80 from a drive source (not shown in FIG. 6) faces the upper and lower positions sandwiching the jack 32. . As shown in FIG. 8, the joint portion 81 is held by a spring-operated clamper 82 provided on the

inner frames

5, 5 when the

inner frames

5, 5 are lowered, and can be detached from the roll shaft. Is lifted from the spring-operated clamper 82 by an inclined surface and lever copying mechanism.

With the above operation, the four forming roll chock yokes are fixed at predetermined positions in the stand, and it is possible to perform the required forming on the workpiece passing through the four-way roll by operating the reduction device. It becomes. Moreover, in order to form a stacked body for roll exchange and to carry it out of the forming roll stand, the above-described operation is performed in reverse.

That is, the side roll yokes 30 and 40 are returned to the stacking position outside the center of the stand by moving both the

jacks

32 and 42 in a shortened manner. Next, when the

inner frames

5 and 5 are lowered, the clamper 70 of the T-shaped member 16 provided on the upper surface of the upper roll chock 10 is released, and the upper side of the side roll yokes 30 and 40 supported by the

inner frames

5 and 5 is released. A roll chock 10 is placed. Further, the lower jack 8 descends and the lower roll chock 20 waits on the replacement rail 61. Further, when the inner frames 5 are lowered, the side roll yokes 30 and 40 are placed on the lower roll chock 20 to form the stacked body 60. By lowering the

inner frames

5, 5, the engagement between the upper and lower roll chocks 10, 20 and the

inner frames

5, 5 is released, and the stacked body 60 can be pulled out toward the replacement rail 61.

As is apparent from the embodiment, the forming apparatus according to the present invention can form and release a roll chock / yoke stack by moving up and down the inner frame. Similarly, the positioning of the side roll is also connected to the jack. It is a configuration that can be engaged and fixed with the inner frame by adjustment, and it is not necessary to provide actuators such as hydraulic cylinders used for forming and releasing stacked bodies, positioning of roll chocks and yokes, etc. in addition to the actuator for raising and lowering the inner frame Therefore, the apparatus has a very simple configuration. Further, when the roll is exchanged, the operation is only to move the inner frame up and down, and the control mechanism and operation of the conventional actuator are not required. Therefore, it is possible to operate with an extremely simple roll exchange operation.

Claims

A forming roll stand having at least both sides of the roll chock yoke and a reduction device thereof, and a replacement rail that allows the roll chock yoke stack to be inserted and removed from the forming roll stand in a horizontal direction perpendicular to the product traveling direction. A molding roll stand having an inner frame that can be moved up and down, and the inner frame is disposed on a required facing surface of the side roll yoke and the side roll yoke is moved into the stand when the inner frame is raised and lowered. A molding device equipped with a mechanical mechanism that enables the guide to the required position and the formation / release of the stacked body.
2. The inner frame further comprises a mechanical mechanism on a required facing surface of the side roll yoke so that the yoke can be positioned or released when connecting or disconnecting the yoke and the reduction device or adjusting its position. The molding apparatus described in 1.
Forming roll stands with roll chocks and yokes for upper and lower rolls and both side rolls, and a reduction device for the roll rolls, and enabling the stack of roll chocks and yokes to be inserted and removed from the forming roll stand in the horizontal direction perpendicular to the product traveling direction. A molding apparatus having a replacement rail has an inner frame that is held up and down in a molding roll stand, and the inner frame is provided on a required facing surface of each roll chock and yoke, and each roll chock A molding apparatus provided with a mechanical mechanism that makes it possible to guide the yoke to a required position in the stand and to form and release the stacked body.
The inner frame further comprises a mechanical mechanism on a required facing surface of each roll chock yoke to enable positioning or release of the yoke when connecting or disconnecting the yoke and the reduction device or adjusting its position. 3. The molding apparatus according to 3.