JP3292563B2 - Roll changer for vertical mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll changing device for a vertical mill in a hot rolling line.

[0002]

2. Description of the Related Art Vertical rolling mills (hereinafter referred to as edger mills) are installed before, after, and after a horizontal rolling mill for the purpose of adjusting the width of a steel sheet. The outline is shown in FIG. The roll 2 supported in the housing 1 by being connected to the chock 7 is rotated via a spindle 5 by a driving device 4 arranged on an upper gantry 3 to roll the rolled material 6. The roll assembly, which is a combination of the roll 2 and the chock 7,
It is suspended by wheels 8 attached to the chock 7 and can be moved in the horizontal direction according to the width of the rolled material 6 by a horizontal roll moving device. In the edger mill having such a structure, the following roll changing method is generally employed.

As shown in FIG. 6, first, a drive spindle 5a of a roll 2 to be replaced is raised by a mechanism (not shown), and then the roll 2 is moved to the center of the mill by a horizontal roll moving device (not shown). I do. Then chock 7
A wire rope 11 hung from an overhead crane via a shackle 10 is fixed to a hanging point 9 provided at a location, and the roll assembly is lifted and carried out by hoisting the overhead crane.

[0004] Incorporation of a new roll is performed by reversing the above operation.

[0005]

In such a roll exchanging means, from the stage of connecting the wire rope 11 to the removal of the wire rope 11 after carrying in the new roll,
It will occupy the overhead crane. Normally, since two rolls are exchanged in pairs, the occupation time of this overhead crane is required to be two to three hours, and other overhead cranes are required for exchanging rolls of adjacent horizontal rolling mills and repairing peripheral equipment. The operation of the mill is hindered, and the downtime of the mill is prolonged.

[0006] In addition, this roll exchange operation requires an operator to ascend on the mill housing 1 to perform the operation. Work on the housing 1 is a work at a high place, and there is a problem that it takes time for safety measures. In addition, as shown in FIG. 7, the gap 26 (between the pull-back frame 27 and the chock 7) provided at the time of roll change at the tip of the horizontal roll moving device is as small as about 10 to 20 mm, as shown in FIG. Since the roll unwinding position is located below the edger driving device 4 and cannot be directly viewed from the overhead crane operator, there is a problem that three to four workers including the crane operator are required. As the number of operating personnel decreases due to factory automation, etc., it is an essential issue to reduce the number of man-hours for such labor-intensive operations.

[0007] The roll exchange of the edger mill is described in JP-A-56-122606 and JP-A-58-2240.
No. 10 is disclosed. JP-A-56-12260
Japanese Patent Application Laid-Open No. 6-204,086 has a problem that the length of the housing 1 (in the direction perpendicular to the line) becomes large, which hinders the handling of backup rolls of a horizontal mill. Japanese Patent Application Laid-Open No. 58-2
No. 24010 has a problem that the position of the roll lifting / lowering cylinder is high and interferes with the mill yard overhead crane, or the roll exchange cylinder interferes with the horizontal mill, and it is difficult to apply it to a hot strip mill edger. there were.

It is an object of the present invention to provide an edger mill roll changing device which solves the above-mentioned problems of the prior art.

[0009]

In order to solve the above-mentioned problems, a roll changing device for a vertical rolling mill according to the present invention is provided at the top of a column provided near the vertical rolling mill. An arm that can be horizontally swung by suspending the hanging tool on the part, and the arm is swung to move the center of the hanging point of the hanging tool to a position immediately below the drive device base of the vertical rolling mill and directly above the line center. And a lifting / lowering means for lifting and lowering the hanging tool.

It is further preferable that the arm is configured to be freely bent in a horizontal plane, and that the bending angle adjusting drive device is provided on the arm.

[0011]

Since the present invention is constructed as described above, when removing the old roll, the roll is moved to the center of the housing, and the arm is turned so that the center of the hanging point of the hanging tool is directly above the center of the housing. The roll can be lifted by moving it to the position and lowering the hanging tool. The roll can be carried out of the mill by turning the arm. When a new roll is mounted on the housing, the opposite operation may be performed.

According to the present invention, it is possible to easily match the center of the hanging point of the hanger with the position of the center of the housing by rotating the arm. Therefore, it is possible to perform the roll changing operation with a smaller number of people and in a shorter time than before. Further, the present invention can perform a roll change operation without interfering with a device near the mill.

[0013]

【Example】

(First Embodiment) As shown in FIG. 1, a column 13 is provided near the edger mill, and an arm 1 is provided on the top of the column 13.
4 is provided so as to be rotatable, and a hanger 30 is attached to the tip of the arm 14 so that the elevating mechanism 16 raises / lowers the hanger via a rope. The height of the arm 14 raises the roll assembly higher than the housing 1,
Any height may be used as long as the arm 14 is pivoted to be below the gantry 3.

When unloading the roll 2, the spindle 5a of the roll 2 is removed, and the roll 2 is moved to the center of the mill (shown by a broken line in the figure). Then, the hanging tool 30 connected to the roll chock 7 by the arm 14 and the lifting mechanism 16 is carried out of the lifting mill. The new roll can be carried into the housing 1 by performing the reverse operation. When changing the rolls, the operator who moves up and down and turns the rolls operates near the mill, so that the work is easy and the number of rolls can be reduced.

(Second Embodiment) As shown in FIGS. 2, 3 and 4, a column 13a is provided upright in the vicinity of a rolling line on the entrance side of an edger mill, and an arm is provided on the column 13a so as to be horizontally pivotable. A drive device 15a for turning the arm 14a is provided. Also, the arm 14
A distal end arm 17 that horizontally rotates around the distal end is provided at the distal end of a, and the distal end arm 17 is provided with a roll elevating mechanism 16a. The arm 14a has an adjusting device 18 for driving the rotation of the tip arm 17.

The arm 14a can be turned by a turning drive device 15a installed below the column 13a. At the distal end of the arm 14a, a distal arm 17 connected by a shaft 25 and an adjusting device 18 for adjusting an angle θ formed by the distal arm 17 and the arm 14a are attached. Next, a roll elevating device 16a is attached to the tip arm 17. In FIG. 4, the roll elevating device 16a can lift the roll assembly by suspending and winding the roll assembly by the wire rope 22.

When unloading the roll, the roll assembly is moved to the center of the mill as shown in FIG. Next, the apparatus is set such that the distal end of the distal arm 17 of the present apparatus is positioned above the roll assembly. Thereafter, the wire rope 22 is paid out from the roll lifting / lowering mechanism 16a, and fastened to the suspension point 23 of the chock 7 via the shackle 10. Next, the roll elevating mechanism 16 a is wound up, and the roll assembly is moved to above the housing 1. Next, the arm 14a in FIG. 2 is turned counterclockwise to carry out the roll assembly out of the edger mill. At this time, the tip arm 1
The arm 14a is turned while adjusting the arm angle θ by the adjusting device 18 so as to maintain the parallelism with the rolling line, and moves to the position indicated by the two-dot chain line in FIG. After that, while keeping the arm angle θ ′ constant, the arm 14a is further turned counterclockwise to move the roll assembly to the roll place, and lowered by the roll lifting mechanism 16a,
Lower the roll assembly to the ground. (The position of the distal end arm 14a at this time is indicated by a dotted line in FIG. 2.) The transport of the old roll is completed as described above. The loading of the new roll is performed in the reverse operation of the unloading. FIG. 3 shows the descaling device 2 on the input side of the edger.
0 shows a diagram in which the roll assembly is carried out while avoiding the crop shear 21.

A wire rope 22 and a shackle 1 for fastening the roll assembly and the roll elevating mechanism 16a are provided.
For the hanging point 23, a chain or a conductive tongue may be used.

[0019]

According to the present invention, a roll change operation, which conventionally took about one hour by three persons, is no longer necessary for a crane driver and a signal person, which is conventionally required. Now you can do it. Further, even if there is a facility near the entrance side of the edger mill that may be an obstacle in unloading the roll assembly according to the related art, according to the present invention, it is possible to perform the roll change regardless of the existence of such existing facilities. It is possible.

[Brief description of the drawings]

FIG. 1 is an explanatory front view of a first embodiment of the present invention.

FIG. 2 is an explanatory plan view of a second embodiment of the present invention.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;

FIG. 4 is a view taken in the direction of arrows BB in FIG. 3;

FIG. 5 is an explanatory view of the front of the edger mill.

FIG. 6 is an explanatory view of a conventional coil replacement operation.

FIG. 7 is a view as viewed in the direction of arrows CC in FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Housing 2 Roll 3 Mount 4 Drive device 5 and 5a Spindle 6 Rolled material 7 Chock 8 Wheel 9 Hanging point 10 Shackle 11 Rope 12 Horizontal rolling machine 13, 13a Column 14, 14a Arm 15, 15a Rotating drive device 16, 16a Lifting mechanism 17 Tip Arm 18 Bending Angle Adjuster 19 Motor 20 Descaling Device 21 Crop Shear 22 Wire Rope 23 Hanging Point 25 Axis 26 Gap 27 Pull Back Frame 30 Hanging Tool

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshisada Takechi 1 Kawasaki-cho, Chuo-ku, Chiba Kawasaki Steel Corporation Chiba Works (56) References JP-A-60-102214 (JP, A) JP-A Sho JP-A-58-224010 (JP, A) JP-A-56-122606 (JP, A) JP-A-55-114410 (JP, A) JP-A-55-40071 (JP, A) A) Fully open sho 59-85602 (JP, U) Fully open sho 59-66908 (JP, U) Fully open sho 56-126905 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) B21B 31/12 B21B 13/06

Claims (2)

(57) [Claims] 1. A roll changing device for a vertical rolling mill, in which a roll is lifted and lowered by a lifting tool at a center position of a line, and which is provided on a top of a column disposed in the vicinity of the vertical rolling mill and has a tip end. An arm which is capable of suspending the suspending device and horizontally pivotable, and a pivot for pivoting the arm to move the center of the suspension point of the suspending device to a position immediately below the drive unit base of the vertical rolling mill and directly above the line center. A roll changing device for a vertical rolling mill, comprising a device and a lifting means for lifting and lowering the hanging tool. 2. The roll exchanging device for a vertical rolling mill according to claim 1, wherein said arm is bendable on a horizontal plane, and said arm is provided with a drive device for adjusting the bending angle.