JPH06335710A - Four-roll rolling mill and roll changing method - Google Patents

Abstract

PURPOSE:To safely and easily execute the roll exchange by handling the combination of a roll and shaft separately from the main body of the rolling mill. CONSTITUTION:The rolling device is composed of a base block 1 on which a rolling hole 4 and roll holes 5 provided on the top and bottom and the right and left sides are provided and four roll blocks 2 which are assembled freely attachably and detachably to the base block 1 by positioning the peripheral surfaces 8 of assembled rolls 3 in the roll holes 5. Change of the rolls 3 is is integrally executed together with the roll block 2 and the substantial change of the rolls 3 is achieved between the rolls and a roll block 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-roll rolling apparatus for rolling and manufacturing wire rods and steel bars and a method for replacing rolls of the rolling apparatus.

[0002]

As a machine for rolling and manufacturing wire rods and bars,
Up to now, a 4-roll rolling mill has been widely used. As shown in FIG. 4, this conventional four-roll rolling mill has four rolls 3 on the same plane toward the center of the rolling mill body 23 in order to form a rolling unit at the center of the rolling mill body 23.
It is provided at an angle of every °.

In this conventional four-roll rolling mill, the rolls 3 are exchanged by pulling out the shaft 7 fixing each roll 3 from the rolling mill body 23, pulling out the roll 3 from the rolling mill body 23, and then , New roll 3
Is achieved by inserting the shaft 7 into the rolling mill body 23.

[0004]

However, in the above-mentioned prior art, if the 4-roll rolling apparatus is for cold rolling, the shafts and rolls are generally relatively small and lightweight. However, in the case of a four-roll rolling mill for hot rolling, a larger load and torque are generated in the rolling mill than for cold rolling. It is necessary to increase the strength, and each roll or shaft is 30 kg to 1
The weight is as heavy as 00 kg, and there is a problem in that the work of exchanging rolls by hand is dangerous and difficult, and becomes extremely inefficient.

Therefore, the present invention was devised to solve the above-mentioned problems in the prior art, and it is possible to handle a combination of a roll and a shaft separately from the rolling mill body. This is a technical issue, and its purpose is to enable roll replacement to be performed safely and easily.

[0006]

In order to solve the above technical problems, the structure means of the present invention is provided with rolling holes through which a rolled material passes in the front-rear direction and roll holes in four directions, up and down and left and right. Having a base block, having roll blocks that can be removably assembled with fasteners on the four sides of this base block, and being able to rotatably and detachably be assembled by a shaft on this roll block. It has a roll whose peripheral surface is located in the roll hole of the base block when assembled to the block, and when each roll block is assembled to the base block, each axis is located on the same plane and The angle of intersection of the axes of the matched roll blocks should be 90 °.

Further, the method means of the present invention for solving the above technical problem is to intermittently rotate the base block at a central angle of 90 °, and at an appropriate intermittent stop position associated with the intermittent rotation of the base block. The work of removing the fasteners from the base block, the work of removing the roll blocks, the work of installing a new roll block with replacement rolls, and the work of installing the fasteners are performed in order. .

When exchanging the rolls, the base block is intermittently rotated at a central angle of 90 ° with the horizontal center axis of the rolling hole of the base block as the axis of rotation, and the rolls to be replaced are assembled. At the intermittent stop position where the roll block is located laterally, the work of removing the fastener is performed at the next intermittent stop position where the roll block to which the roll to be replaced is assembled is located above, and the work of removing the roll block, This is effective because the installation work of the new roll block with the replacement rolls attached and the installation work of the fasteners are sequentially performed at the next intermittent stop position where the new roll block is located laterally.

For intermittent rotation of the base block at a central angle of 90 °, the front portion of the base block is cantilevered at the tip of a drive shaft that is intermittently rotated at a central angle of 90 ° for a rotating device provided exclusively. It is advantageous to mount the base block at this time by supporting the rear surface of the base block with the idling rotating plate of the shake suppression device while sandwiching the base block with the drive shaft of the rotating device. Good to do.

[0010]

The rolls are attached to the base block through the shaft to the roll block that is detachably attached to the base block. Therefore, by removing the fasteners, the roll block and the base block are attached together. It can be removed from the block and, conversely, it can be attached to the base block together with the roll block.

Therefore, when it is desired to replace a worn roll with a new roll, that is, a replacement roll, the worn roll is removed from the base block together with the roll block to which the worn roll is attached, and the roll is replaced in advance with a dedicated processing facility. A separate roll block with a work roll assembled may be attached to this base block.

In this roll replacement, since the roll blocks are mounted on the four sides of the base block in the upper, lower, left, and right directions, they are positioned at 90 ° center angle with respect to each other. 90 °
When the intermittent rotation of the base block is performed, the intermittent stop position of the base block becomes constant, and the posture and the position of each roll block stopped at the intermittent stop position of the base block become constant.

As described above, since the posture and position of each roll block stopped at the intermittent stop position of the base block are constant, it is necessary to perform roll exchange by adapting to the constant posture and position of the roll block. Removal of fasteners, removal of roll blocks with worn rolls, installation of new roll blocks with replacement rolls, and fastening of the new roll blocks to the base block. Each work of the mounting work can be carried out by selecting an intermittent stop position where it is easy to carry out this work.

For example, since the fastener only achieves the tightening and fixing of the roll block assembled to the base block, the working space on the floor surface can be sufficiently secured, and the fastener is relatively low. Since it is located, the work of removing and attaching the fastener is performed safely, easily and efficiently by performing the work of removing and installing the fastener in the intermittent stop position where the roll block is located laterally with respect to the base block.

Further, the work of mounting and removing the roll block with the rolls mounted on and removed from the base block is carried out by a suspending operation using a crane because the combination of the roll and the roll block is heavy. It is advantageous, therefore, that the roll block is removed and installed in the intermittent stop position where the roll block is located above the base block, so that the crane suspends the roll block and the safety is maintained. Can be achieved easily, easily and efficiently.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. The base block 1 has a rectangular parallelepiped main body in which both front and rear sides are square and the other four sides are the same rectangle, and a rolling hole 4 penetrating in the front and rear direction is opened in the center of the main body, and four side surfaces are formed. That is, a roll hole 5 communicating with the rolling hole 4 is provided on the upper and lower surfaces and the left and right surfaces, and a mounting hole 12 is provided on the front surface.

Each roll block 2 has a rectangular parallelepiped main body, and a concave portion for assembling the roll 3 is formed in the main body so as to be opened on one side surface, and both sides of the side surface where the concave portion is opened are formed. On the side, against the roll block 2,
The roll 3 has a hole in which a shaft 7 for rotatably and detachably assembling is provided in a concave portion in a state where approximately half of the roll 3 is projected.

Therefore, when each roll block 2 with the rolls 3 assembled is attached to each side surface of the base block 1, the rolls 3 assembled with each roll block 2 pass through the roll holes 5 of the base block 1 and Circumferential surface 8 is rolled hole 4
As a result, the rolling portion is formed by the combination of the peripheral surfaces 8 of the rolls 3.

Straight rod-shaped die rods 11 are erected and fixed at the four corners of each side surface of the base block 1, and the concave portions of each roll block 2 are provided at the four corners of one side surface.
A through hole through which the die rod 11 is inserted is provided, and by inserting the die rod 11 of the base block 1 into the through hole of the roll block 2, the base block 1
The mounting of the roll block 2 in the aligned state with respect to is achieved.

With the roll block 2 attached to the base block 1, a male screw is formed at the tip of the die rod 11 protruding from the through hole of the roll block 2.
The roll block 2 with respect to the base block 1 is tightened by fastening the fixing nut-shaped fastener 6 screwed onto this male screw.
Assembling fixation of is achieved.

In the rotating device 9 used for replacing the roll block 2, the drive shaft 16 is rotatably mounted and held on the upper end of the holding base 13 which is the installation base with the shaft center horizontal and protruding forward and backward. The worm gear 15 is attached to the end of the drive shaft 16 protruding to the front side of the base 13, and the worm gear 1
5, the worm gear mounted on the motor shaft of the motor 14 mounted on the front surface of the holding base 13 is engaged, and the base block 1 is mounted on the four corners at the ends of the drive shaft 16 projecting to the rear surface side of the holding base 13. A drive plate 17 having a fixing bolt 18 screwed into the hole 12 and rotatably mounted therein is provided.

The drive shaft 16 of the rotating device 9 has a rear projecting end portion having an outer diameter substantially equal to the diameter of the opening end portion of the rolling hole 4 of the base block 1, and therefore the rear side of the drive shaft 16 is provided. The projecting end is the rolling hole 4 of the base block 1.
By inserting the fixing bolts 18 provided on the driving plate 17 into the corresponding mounting holes 12 exactly by inserting the fixing bolts 18 into the front opening end of the rolling plate 9, the rolling device, that is, the base for the rolling device 9, that is, the base. Assembly of the block 1 becomes easy.

The shake suppressing device 10 which is arranged so as to face the rotating device 9 and stably supports the rolling device attached to the rotating device 9 between the rotating device 9 and the rolling device 9 is a support base serving as an installation base. In FIG. 19, the pressing shaft 21 is positioned by extending the central axis of the drive shaft 16 of the rotating device 9 on an extension of the central axis, and the pressing shaft 21 is displaced in the front-rear direction with the front and rear ends thereof protruding from the support 19. A rotating plate 22 for fitting the central portion into the rear opening of the rolling hole 4 of the base block 1 is rotatably attached to the protruding front end of the pressing shaft 21, and the protruding rear end of the pressing shaft 21 is further attached. Is connected to the cylinder 20.

The pressing shaft 21 in the blur suppression device 10
Is rotatably attached to a support base 19, and in a state where the rotating plate 22 is assembled to the base block 1 and the rolling device is supported by the rotating device 9 and the shake suppressing device 10, the drive shaft of the rotating device 9 is 16 and the base block 1 are intermittently rotated at a central angle of 90 °.

In order to replace the roll block 2 using the rotating device 9 and the shake restraining device 10, the rolling device requiring the replacement of the roll 3 is hung and conveyed by using a crane or the like, and the hanging process is performed. In this state, the assembly of the rolling device to the rotating device 9 and the shake suppressing device 10 is achieved.

The assembling of the rolling device to the rotating device 9 and the shake restraining device 10 is accomplished in a posture in which the pair of roll blocks 2 of the rolling device are positioned vertically and the other pair of roll blocks 2 are positioned laterally. After the assembly is completed, the drive shaft 16 is driven by driving the motor 14 of the rotating device 9 at a constant rotation speed.
Is intermittently rotated at a rotation angle of 90 °, and the rolling mill is intermittently rotated at a central angle of 90 °.

The work for removing the fastener 6, the work for removing the roll block 2, the work for attaching the roll 6, and the work for attaching the fastener 6, which are necessary for exchanging the roll 3, are performed at the intermittent stop position of the base block 1 which is intermittently rotated. However, the removal work of the fastener 6 is performed at the horizontal intermittent stop position where it moves to the upper side of the base block 1 by intermittent rotation, and the removal work and the installation work of the roll block 2 are intermittently stopped on the upper side of the base block 1. The fastening operation of the fastener 6 is performed at the position, and at the lateral intermittent stop position which is moved from the upper side of the base block 1 by the intermittent rotation.

At the intermittent stop position beside the base block 1, the roll block 2 is temporarily assembled to the base block 1 without the fastener 6, but the die rod of the base block 1 is inserted into the through hole of the roll block 2. Since 11 is fitted, even if the fastener 6 is removed,
As it is, the roll block 2 does not drop from the base block 1 by its own weight.

Since the removal work and the installation work of the roll block 2 are performed at the intermittent stop position on the upper side of the base block 1, the work can be accomplished only by suspending the roll block 2 by the crane, whereby the roll 3 It is possible to easily, safely, and efficiently perform the work of removing and installing the roll block 2, which is the substantial work of replacing the roll block 2.

Needless to say, the work for removing and mounting the roll block 2 is not limited to the crane, and a dedicated automatic exchanging device using a lifter or the like may be used.

[0031]

Since the present invention has the above-mentioned structure, it has the following effects. Since the roll block assembled with the roll is a separate piece that can be freely attached to and detached from the base block, the rolls can be handled individually when the rolls are exchanged. It is possible to significantly reduce the restrictions on the work, and thus to simplify the roll replacement work. Wear.

Since the roll is attached and detached to and from the roll block which is a separate piece from the base block, the work can be carried out under suitable conditions, so that the roll can be detached and attached safely. And can be achieved satisfactorily and efficiently.

Substantial attachment / detachment of the roll to / from the base block is accomplished by attaching / detaching the roll block to / from the base block, and the attachment / detachment of the roll block to / from the base block is the attachment / detachment of the blocks. It can be achieved in a precisely positioned state by a simple and easy operation, so that the roll exchange can be safely, efficiently and accurately achieved.

Since the base block is intermittently rotated at a central angle of 90 °, and the roll blocks are attached to and removed from the base block at the intermittent stop position, a plurality of roll blocks can be attached and detached in order and suitable work can be performed. It can be achieved under the conditions, and thus roll exchange can be safely and efficiently achieved.

[Brief description of drawings]

FIG. 1 is a rear elevational view showing an embodiment of the device of the present invention, which is cut vertically.

FIG. 2 is an overall front view of the embodiment shown in FIG.

FIG. 3 is an overall side view showing an embodiment of the present invention during roll replacement.

FIG. 4 is a front vertical sectional view showing a conventional technique.

[Explanation of symbols]

 1; Base block 2; Roll block 3; Roll 4; Rolling hole 5; Roll hole 6; Fastener 7; Shaft 8; Circumferential surface 9; Rotating device 10; Anti-vibration device 11; Die rod 12; Mounting hole 13; 14; Motor 15; Warm gear 16; Drive shaft 17; Drive plate 18; Fixing bolt 19; Support base 20; Cylinder 21; Pressing shaft 22; Rotating plate 23; Rolling mill body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hidenori Kondo, 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (no address) Inside the Mizushima Steel Works, Kawasaki Steel Co., Ltd. Chome (No house number) Kawashima Steel Co., Ltd. Mizushima Steel Works (72) Inventor Eisuke Yamanaka Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture (No house) Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Norio Kunida Ehime Ehime Sumitomo Heavy Industries Machinery Co., Ltd. Niihama Works, Niihama, Niihama Prefecture, Japan (72) Inventor Takeshi Tange, Soimachi Kikai Niihama, Niihama, Ehime Prefecture Niihama Works (72) Inventor Yamazaki Masato 5-2 Sokai-cho, Niihama-shi, Ehime Sumitomo Heavy Industries, Ltd. Niihama Works

Claims (5)

[Claims] 1. A rolling hole (4) through which a rolled material passes in the front-back direction.
And has roll holes in four directions, up and down and left and right.
A base block (1) having (5), and the base block
A roll block (2) which is detachably assembled by fasteners (6) on the four sides of (1) above, below, left and right, and the roll block (2)
Is rotatably and detachably assembled by means of a shaft (7), and while the roll block (2) is assembled to the base block (1), the peripheral surface (8) is positioned inside the roll hole (5). The rolls (3) to be made, and each of the roll blocks (2) mounted on the base block (1), the shafts (7) are located on the same plane, and are adjacent to each other. A 4-roll rolling machine configured so that the intersecting angle of the axes (7) is 90 °. 2. The base block (1) is intermittently rotated at a central angle of 90 °, and at the intermittent stop position of the base block (1), the work of removing the fastener (6) from the base block (1), Roll block (2) removal work, replacement roll
A roll replacement method for a 4-roll rolling mill in which the work of installing the new roll block (2) with the assembly of (3) and the work of installing the fastener (6) are performed in order. 3. The base block (1) should be intermittently rotated at a central angle of 90 ° with the horizontal center axis of the rolling hole (4) of the base block (1) as the axis of rotation for replacement. Roll (3)
At the intermittent stop position where the assembled roll block (2) is located laterally, remove the fastener (6) at the next intermittent stop position where the roll block (2) is located above the roll block (2). Perform the removal work of (2) and the installation work of the new roll block (2) with the replacement roll (3) assembled, and at the next intermittent stop position where the new roll block (2) is located laterally. The method for exchanging rolls of a four-roll rolling apparatus according to claim 2, wherein the work of attaching the fasteners (6) is performed respectively. 4. The base block (1) at the tip of a drive shaft (16) which intermittently rotates at a central angle of 90 ° and at which the central angle of the rotating device (9) rotates at 90 °. The roll replacement method for a four-roll rolling mill according to claim 2 or 3, wherein the front face of (1) is assembled in a cantilever manner. 5. The drive shaft (16) of the rotating device (9) is provided on the rear surface of the base block (1) by a rotating plate (22) of the shake suppressing device (10).
The method for exchanging rolls of a four-roll rolling mill according to claim 4, wherein the base block (1) is supported by being sandwiched between and.