JP3365665B2 - Roll exchange method and apparatus 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 method and apparatus for a vertical rolling 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 or 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 by being combined with the chock 3 in the housing 1 is rotationally driven by the drive mechanism 5 arranged on the upper mount 6 via the spindle 4. The roll position is movable in the horizontal direction in FIG. 4 according to the material width.

In the edger mill having such a structure, the following roll changing method is generally adopted. As shown in FIG. 5, first, the drive spindle 4 of the 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). Next, the hanging point of the fixing bracket 20 for fixing the roller 12 provided on the upper roll chock 3 is fixed by the lifting tool 7 via the wire rope 8 suspended from the overhead crane, and the roll assembly (roll and chock is lifted by winding the overhead crane. (Which means a combination of) is lifted and carried out.

The incorporation of the new roll is carried out by reversing the above operation.

[0005]

In such a roll exchanging method, it is necessary for an operator to go up and work on the mill housing 1 in order to connect the wire rope 8.
The work on the housing 1 is a work at a high place, and there is a problem that it takes time for safety measures. Further, as shown in FIG. 6, the chock 3 and the gap 18 (between the pullback frame 17, the hydraulic pressure lowering frame 16 and the chock 3) provided at the tip of the horizontal roll moving device at the time of roll combination are 1
Since it is as small as 0 to 20 mm, and the roll lifting position is located below the edger drive mechanism 5, it is not directly visible to the overhead crane driver, so 3 to 4 workers including the crane driver There was a problem of needing.

While the number of operating personnel is decreasing due to factory automation and the like, reducing man-hours for such labor-intensive work is an essential issue. Further, JP-A-56-122606 and JP-A-58-224010 disclose roll replacement of the edger mill. JP-A-5
Japanese Patent Laid-Open No. 6-122606 has a problem that the length of the housing 1 (in the direction perpendicular to the line) becomes large, which hinders the backup roll handling of the horizontal mill. Further, in Japanese Patent Laid-Open No. 58-24010, the roll elevating cylinder position is raised and interferes with a millyard overhead crane.
Alternatively, there is a problem that the roll changing cylinder interferes with the horizontal mill, and it is difficult to apply it to a hot strip mill edger.

SUMMARY OF THE INVENTION An object of the present invention is to provide a roll changing method for an edger mill and an apparatus therefor, which solves the above problems of the prior art.

[0008]

(1) Method Invention The present invention is applied to a roll replacing method of a vertical rolling mill in which a roll is moved up and down by a lifting tool at a center position of a line to replace the roll, and the following method is adopted. That is, the line center position or the vicinity thereof該竪type rolling mill main body, the roll axis to match to the line center to guide the vertical movement of the roll, the roll load block or row
A luchock guide mechanism is provided, and the guide mechanism is
The cross section perpendicular to the direction that guides the raising and lowering of the rail is U-shaped,
One end can guide the roll into the housing of the vertical rolling mill
Installed, the other end is opened, and the opening cross-sectional area is locally
It is a method for exchanging rolls of a vertical rolling mill, which is characterized in that the rolls are made large and are moved up and down along the guide mechanism.

(2) Device Invention The present invention is applied to a roll changing device of a vertical rolling mill in which a roll is moved up and down by a lifting tool to be replaced at the center position of the line, and the following technical means are adopted. That is, at a line center position of the vertical rolling mill main body or in the vicinity thereof, a roll lifting tool or a roll lifting device for guiding the roll up and down by aligning the roll axis with the line center.
A roll chock guide mechanism is provided, and the guide mechanism is
The cross section perpendicular to the direction that guides the lifting and lowering of the roll is U-shaped.
Then, one end of the vertical rolling mill has a roll inside the housing.
Installed so that the other end is open and the opening cross-sectional area is locally
It is a roll exchanging device for a vertical rolling mill, which is characterized by being made larger in size .

[0010]

Since the present invention is configured as described above, when the roll is taken out, the roll is moved to the central portion of the housing, and when the roll is hoisted by the hoisting tool, the hoisting tool is guided by the guide mechanism to hoist the roll. On the contrary, when installing a new roll in the housing, the new roll is automatically moved to the center of the housing when the new roll is moved above the guide by the hanger and the hanger is lowered along the guide. Can be attached to. Also, the roll chock can be guided by a guide mechanism. Therefore, the roll replacement work can be performed by a smaller number of people and in a shorter time than in the conventional case.

[0011]

【Example】

(First Embodiment) A guide mechanism of the present invention will be described with reference to FIG. FIG. 1A is a plan view of the pedestal 6 of the drive mechanism 5, FIG.
1B is a state in which the roll assembly is suspended by the suspension 11, and FIG. 1C is a sectional view taken along the line AA of FIG. 1B. The gantry 6 has a hole 19 at the center of the mill for the roll lifting tool 11 to lock.
A guide 9 for guiding the guide 9 and a guide guide 10 for assisting the guide of the hanger 11 into the hole 19 are attached.

The hanger 11 is connected to the roll chock 3 with a pin or the like, and is fixed so as to have a linear shape as a whole. Further, the hanging tool 11 is vertically held by the guide 9 and is formed in a columnar structure having a rectangular cross section so as to be locked in the hole 19 of the upper mount 6. When hanging the roll 2,
First, the suspending tool 11 is transported by a crane or the like, the upper part of the suspending tool 11 is brought into contact with the guide 9, and thereafter, the slinging tool 11 is slid in parallel with the guide 9 and locked in the hole 19 of the upper mount 6, so that the suspending tool 11 is moved. It can be correctly guided on the roll chock 3. After connecting the lifting tool 11 to the roll assembly, the roll assembly is lifted to a position where the roll chock 3 does not interfere with the housing 1, and the roll assembly is carried out of the mill. When suspending a new roll, lift the roll assembly to a level where the roll chock 3 does not interfere with the housing.
Further, by abutting the hanger 11 to the guide 9, after clamping the suspender 11 vertically moves in parallel with the upper guide 9, by Kudasu hanging where engaged with the hole 19 of the mill drive unit pedestal 6 Easily place the roll in the correct position (center of housing 1)
Can be dropped on.

(Second Embodiment) The first embodiment is an example in which a hanger is guided, but an example in which a guide for guiding a chock roller is provided will be described. 2A and 2B are explanatory views of a second embodiment of the guide mechanism of the present invention. FIG. 2A is a front view of the edger mill, and FIG. 2B is a view taken along the line BB of FIG. 2A. is there. As a guide mechanism, a guide 13 is provided at the center of the housing 1, and the guide 13 is formed in a U-shaped cross section with an opening area increasing toward the upper side so that the roller 12 of the chock 3 can be easily guided in the vertical direction. There is.

When the roll 2 is taken out, as described above, as shown by the dotted line in FIG.
Of the wire 8 and the chock 3 are connected to each other, and the wire 8 is lifted so that the roller 12 is guided by the guide 13. When the roller 12 of the chock 3 is lifted above the guide 13, the roll assembly is carried out of the housing 1. When loading a new roll, the reverse operation may be performed.

(Third Embodiment) This embodiment is an example in which the structure of the suspender is different from that of the first embodiment. 3A and 3B are explanatory views of a third embodiment of the present invention, FIG. 3A is a front view of a lifting device, FIG. 3B is a view taken along the line CC of FIG. 3A, and FIG. 3C is a front view of the edger mill, and FIG. 3D is D- of FIG. 3C.
FIG. 3E is a view on arrow D, and FIG. 3E is a view on arrow EE in FIG.

As shown in FIG. 3 (a), the lifting tool 14 is a two-point lifting method using a locking portion provided on the chock 3, and a detailed description thereof will be omitted. The interval is variable. In this embodiment, a guide 15 for locking and guiding the end 14a of the hanger 14 is provided at the center of the housing. As shown in FIGS. 3D and 3E, the cross-sectional shape of the guide 15 has an end portion 14 (a) at the upper portion.
Is formed so as to have a large distance between the upper end and the lower end, and to limit the end portion 14 (a) from lateral movement of the hanger 14.

The roll exchanging work is the same as that of the second embodiment, and therefore its explanation is omitted.

[0018]

According to the present invention, the connection of the roll assembly to the crane can be remotely controlled, and since the guide for incorporating the roll assembly into the housing 1 is provided, slinging on the housing is not necessary. Therefore, it is possible to eliminate the dangerous work at a high place, and it is possible for two people including the crane driver to complete the roll exchange work, which conventionally took about one hour for three people, in about 30 minutes. became.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention.
FIG. 1A is a plan view of a drive mechanism mount of an edger mill, FIG.
FIG. 1B is a state diagram in which the roll assembly is suspended by a suspender, and FIG. 1C is a cross-sectional view taken along the line AA of FIG. 1B.

2 is an explanatory diagram of a second embodiment of the present invention, and FIG.
2A is a front view of the edger mill, and FIG.
It is a BB arrow line view of (a).

FIG. 3 is an explanatory diagram of the third embodiment of the present invention.
FIG. 3A is a front view of the lifting device, and FIG. 3B is C- of FIG. 3A.
FIG. 3C is a front view of the edger mill, and FIG.
3D is a view taken along the line DD of FIG. 3C, and FIG. 3E is a view taken along the line EE of FIG. 3C.

FIG. 4 is a front view of an edger mill of the related art.

FIG. 5 is an explanatory diagram of a conventional roll exchange.

FIG. 6 is a view on arrow FF in FIG.

[Explanation of symbols]

1 Housing 2 Roll 3 Chock 4 Drive Shaft 5 Drive Mechanism 6 Stand 7 Lifting Tool 8 Wire 9 Guide 10 Guide 11 Lifting Tool 12 Roller 13 Guide 14 Lifting Tool 15 Lifting Tool End 16 Hydraulic Reduction Cylinder 17 Pullback Frame 18 Clearance 19 Hole 20 bracket

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshisada Takechi 1 Kawasaki-cho, Chuo-ku, Chiba City Kawasaki Steel Co., Ltd. Inside Chiba Works (56) References JP-A-60-102214 (JP, A) JP-A 56-6713 (JP, A) JP 5-185121 (JP, A) JP 7-100512 (JP, A) JP 7-206372 (JP, A) JP 58-224010 (JP, A) JP-A-56-160812 (JP, A) JP-A-56-122606 (JP, A) JP-A-48-19463 (JP, A) Actual development 62-123304 (JP, U) Actual development Sho-63 -62217 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B21B 31/12 B21B 13/06 B65G 47/90 B66C 11/12

Claims (2)

(57) [Claims] 1. A roll replacement method for a vertical rolling mill in which a roll is moved up and down by a lifting tool to be replaced at a line center position, wherein a roll axis is provided at or near the line center position of the vertical rolling mill main body. A guide mechanism for the roll hanger or roll chock that matches the center of the line and guides the roll up and down.
The guide mechanism is provided in a direction for guiding the roll up and down.
The vertical cross section is U-shaped, and one end is
Install the roll in the housing so that it can be guided and open the other end.
A method of exchanging rolls for a vertical rolling mill, characterized in that the opening cross-sectional area is locally increased and the roll is moved up and down along the guide mechanism. 2. A roll exchanging device for a vertical rolling mill in which a roll is moved up and down by a lifting tool to be replaced at a line center position, wherein a roll axis is provided at or near the line center position of the vertical rolling mill main body. A guide mechanism for the roll hanger or roll chock that matches the center of the line and guides the roll up and down.
The guide mechanism is provided in a direction for guiding the roll up and down.
The vertical cross section is U-shaped, and one end is
Install the roll in the housing so that it can be guided and open the other end.
The roll changing device for the vertical rolling mill is characterized in that the opening cross-sectional area is locally increased .