JPH08252611A - Equipment for joining rolled stock - Google Patents

Abstract

PURPOSE: To reduce the capacity of a press to be used by reducing overlapping margin with distance from both ends of width of a rolled stock to the center and also joining the rolled stocks by pressure welding in a state they are separated from each other in the center. CONSTITUTION: This equipment for joining the rolled stocks is provided with clamp devices, which are mounted on a truck traveled in the rolling direction and horizontally clamping the rear end part of a preceding rolled stock 1a and the tip part of the succeeding rolled stock 1b, a cutting device for removing scale in the joined part, a reduction keeping device for keeping cut surfaces in the reduced state and a pressure welding device for overlapping and compressing surfaces to be worked. The end parts of the preceding rolled stock 1a and the succeeding rolled stock 1b are made into a concave circular shape, overlapping margin (m) in the edge parts of width are taken as 30-60mm, the margin is reduced with distance to the center of width and the stocks are separated from each other in the center by (n) (10-20mm). In this way, the overlapped area of the rolled stocks 1 is remarkbly small, so the capacity of press device used for rolling can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for performing pressure welding after cutting a trailing end of a preceding rolling material and a leading edge of a succeeding rolling material in a hot rolling facility, and more particularly to a rolling material for pressure welding. The present invention relates to equipment for joining rolled materials with a reduced overlapping area.

[0002]

2. Description of the Related Art In a conventional hot rolling facility, a slab supplied from a heating furnace is rolled by a rough rolling mill and a finish rolling mill to obtain a strip material having a desired plate thickness. However, in such a method, rolling work is performed for each slab unit, and thus continuous rolling work has been demanded. In addition, when rolling in slab units in this way, defects easily occur at the ends (front end and rear end) of the rolled material, the yield of the rolled material decreases, and because of biting, slippage, etc. There was a problem that it was difficult to speed up. Therefore, a joining device has been proposed in which the rear end of a rolled material rolled by a rough rolling mill and the front end of the next rolled material are joined and supplied to a finishing rolling mill.

[0003]

In the case of pressure welding, the trailing end of the preceding rolled material and the leading end of the following rolled material are overlapped and crimped, but conventionally, the end cut straight as shown in FIG. The parts 31 and 32 were overlapped. Depending on the plate thickness, 30-60 at the end of the plate width of the rolled material
mm is necessary, but may be small in the central portion. Also,
When compressing, the capacity of the press used is determined by the area of overlap. Therefore, the overlapping area is reduced,
It was desired to overlap to reduce the ability of the press to compress.

Further, Japanese Unexamined Patent Publication (Kokai) No. 62-252603 discloses a "plate joining method" which discloses a technique in which a joint is driven between the end portions of the plates to be joined to join them, but the whole width of the rolled material is covered. , It is necessary to drive many joints in a short time,
There is a problem that automation (mechanization) is difficult and the joint cannot be uniformly rolled. Also, JP-A-63-934
No. 08 "Bar joining equipment" shows a technique of forming a loop on a rolled material and press-contacting the rear end and the tip, but since a relatively thick bar material is formed on the loop, There was a problem that a bending tendency was likely to occur and sufficient bonding time could not be secured. Further, in Japanese Patent Publication No. 5-139, "Bath strip running welding device", a device for welding and joining a rear end and a tip while traveling with a rolled material is shown, but a wide rolled material is welded. Takes a lot of time, so the entire equipment tends to be long, and unevenness is likely to occur at the joint,
There is a problem that it is difficult to uniformly roll the joint. In addition, when the above-mentioned joining device is added to an existing line, the existing line needs to be remodeled, and the production down time also becomes long.

The present invention has been made in view of the above-mentioned needs and problems, and is provided with a device for reducing the overlapping area when pressure-bonding rolled materials, and the press device used for pressure-bonding has a small capability. It is an object of the present invention to provide a rolling material joining facility that enables the miniaturization of a corner, a press machine and related equipment, and saves equipment costs.

[0006]

In order to achieve the above object, the present invention provides a cutting device for cutting a trailing end of a preceding rolled material and a leading end of a following rolled material into a concave curved shape, and a downstream of the cutting device. The trailing edge of the preceding rolled material and the leading edge of the following rolled material are overlapped at both ends of the strip width of the rolled material so that the overlapping margin becomes smaller from the both ends toward the center. In the center, there is provided a rolled material joining device that performs pressure welding without any superposition.

[0007]

According to the present invention, a cutting device for cutting at least one of the trailing end of the preceding rolled material and the leading end of the following rolled material into a concave curved shape, and the preceding rolling provided downstream of the cutting device. The trailing edge of the strip and the leading edge of the following strip are overlapped at both ends of the strip width of the strip so that the overlap margin becomes smaller from both ends toward the center and there is no overlap at the center. Since it is provided with a rolled material joining device for pressure welding in a separated state, the cutting device cuts both the trailing end of the preceding rolled material and the leading end of the following rolled material into a concave curved shape, and thus, Setup for both rolled materials when pressure welding with the rolled material joining device, that is, the trailing end of the preceding rolled material and the leading end of the following rolled material are overlapped at both ends of the strip width of the rolled material In its center superimposed with so that overlapping margin becomes smaller as going it it is easy to state, but apart no.

In this way, since the overlapping area of the trailing end portion of the preceding rolled material and the leading end portion of the succeeding rolled material that have been pressed against each other is remarkably smaller than that of the conventional one, the capability of the press device used for the pressure contact is improved. A small one will do.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the same reference numeral represents the same meaning. FIG. 1 is a side view showing the arrangement of this embodiment in a hot rolling facility. The slab sent out from the heating furnace 5 is rolled by the rough rolling mill train R, and the rolled material 1 is cut by the cutting device 6 of this embodiment into a concave arc shape at the front end and the rear end. The rolling material joining apparatus 10 of the present embodiment superposes and compresses the trailing end portion of the preceding rolling material and the leading end portion of the succeeding rolling material by pressing them while running. Bonded rolled material 1
Is subjected to finish rolling in the finishing rolling mill train F to have a desired plate thickness and wound on the down coiler DC.

2A and 2B show the construction of the cutting device 6, wherein FIG. 2A is a side sectional view and FIG. 2B is a development view of the rotary drum. The cutting device 6 is a pair of rotary drums 6a arranged with the rolled material 1 in between, and the surface of the rotary drum 6a is separated by about 180 degrees, and the line connecting both ends is parallel to the rotary shaft 7 and It is provided with arcuate blades 6b and 6c arranged symmetrically. A flank 6d is provided on the rotary drum 6a so that the rolled material 1 can pass therethrough.

FIG. 3 shows the preceding rolled material 1a by the cutting device 6.
It is an explanatory view of cutting the rear end of the
(B) is a plan view of the rolled material 1. The trailing end of the preceding rolled material 1a rotates as it emerges from the rotary drum 6a, cutting the end into a concave arc as shown by the broken line in (B). The straight arrows indicate the traveling direction of the rolled material 1.

FIG. 4 shows the succeeding rolled material 1b by the cutting device 6.
2A is an explanatory view of cutting the tip of FIG.
(B) is a plan view of the rolled material 1. When the tip of the succeeding rolled material 1b enters the rotary drum 6a, it rotates and cuts the end into a concave arc shape as shown by the broken line in (B). The straight arrows indicate the traveling direction of the rolled material 1.

FIG. 5 is a side view showing the construction of the rolled material joining apparatus. In FIG. 5, a rolled material joining device 10 includes a trolley 12 that travels in the rolling direction, and a trailing end clamping device that is mounted on the trolley 12 and horizontally clamps the trailing end of the preceding rolled material 1a so that it can move up and down. 14, a tip clamp device 16 mounted on the carriage 12 to horizontally clamp the tip of the following rolled material 1b, a rear end lower surface of the preceding rolled material 1a, and a tip upper surface of the following rolled material 1b are cut. A cutting device 18 for removing the scale, a reduction holding device 20 for holding the cutting surface in a reduced state, and a cutting work surface of the preceding rolled material 1a and a succeeding rolled material 1b are overlapped to each other to a thickness almost equal to that of the rolled material 1a, 1b. And a pressure welding device 22 for compressing and joining.

The trailing edge clamp device 14 is used for the preceding rolled material 1a.
A plurality of rollers 15a that horizontally support the rear end portion, a clamp 15b that vertically moves by sandwiching the rear end portion of the preceding rolled material 1a between the rollers 15a, and a rear end lower surface of the preceding rolled material 1a will be described later. Processing height H to be brought into contact with the upper surface of the cutter 19a
And a press contact height L for holding the trailing end of the preceding rolled material 1a at substantially the same height as the leading end of the succeeding rolled material 1b, and an elevating cylinder 15c for vertically moving the roller 15a and the clamp 15b. . With this configuration, the roller 15a
With the rear end of the preceding rolled material 1a supported horizontally,
The rear end of the preceding rolled material 1a can be clamped by the clamp 15b. Further, the lifting cylinder 15c holds the roller 15a and the clamp 15b at the cutting height H, and a single cutter 19a can cut the trailing end lower surface of the preceding rolled material 1a and the leading end upper surface of the succeeding rolled material 1b. Further, the cutting surface of the preceding rolled material 1a and the succeeding rolled material 1b can be overlapped with each other while being held at the pressure contact height L, and compressed by the pressure contact device 22 to be bonded.

The tip clamp device 16 is used for the succeeding rolled material 1b.
Roller 17a for horizontally supporting the tip of the roller, and the roller 17a
and a clamp 17b for sandwiching the tip of the succeeding rolled material 1b between the clamp 17b and a. With this structure, the roller 17a holds the succeeding rolled material 1b horizontally while the clamp 17
The front end portion of the subsequent rolled material 1b can be clamped by b.

The cutting device 18 includes a cylindrical cutter 19a that rotates about the widthwise axis of the rolled material 1a and 1b, and a swinging device 19b that swings the cutter 19a in an oblique direction.
Reciprocating device 19 for moving the cutter 19a back and forth in the rolling direction
It consists of c and. The cutter 19a is attached to the arm tip of the swinging device 19b and is rotated by a rotation driving device (not shown). The cutter 19a includes a rocking device 19b and a reciprocating device 19b.
By c, the lower surface of the trailing end portion of the preceding rolled material 1a and the upper surface of the leading end portion of the succeeding rolled material 1b are cut at the cutting position indicated by the thicker line in FIG. 5, and after processing, they are retracted to the position indicated by the thinner line. To do.

In the pressure welding device 22, an upper die 23a having a lower surface in contact with the upper surface of the trailing end portion of the preceding rolled material 1a, and a lower die 23b having an upper surface in contact with the lower surface of the leading end portion of the succeeding rolled material 1b,
The upper mold 23a and the lower mold 23b are sandwiched and compressed by a pressing device 23c. The lower die 23b is fixed to the carriage 12. The upper die 23a is the ram 2 of the press device 23c.
It is attached to the lower surface of 3e and moves up and down together with the ram 23e. With such a configuration, the rear end portion of the preceding rolled material 1a and the leading end portion of the succeeding rolled material 1b can be supported by the upper die 23a and the lower die 23b during cutting by the cutting device 18, and the pressing device 23c. By lowering the ram 23e, the cutting surfaces of the preceding rolled material 1a and the succeeding rolled material 1b can be overlapped and compressed to have the same thickness as the rolled materials 1a and 1b.

FIG. 6 is a plan view showing the superposed state of the preceding rolled material 1a and the succeeding rolled material 1b at the joint.
In the embodiment of FIG. 6, the end portions of the preceding rolled material 1a and the succeeding rolled material 1b are both formed into a concave arc shape. The arrow direction indicates the traveling direction of the rolled material 1. m is a lap margin at the strip width end, which is 30 to 60 mm depending on the strip thickness, and the lap margin becomes smaller toward the center of the strip width, and at the center, the trailing end portion of the preceding rolled material 1a and the subsequent rolled material 1a. The tips of 1b are separated by n (10 to 20 mm). Bonding strength can be obtained by setting the overlap margin to this extent. The overlapping area is reduced, and the pressing device 2
The capacity of 3c may be small. This superposition can be realized by using the cutting device 6 shown in FIGS.

The reduction holding device 20 is a coke oven gas, L
Combustion gas such as PG and LNG is burned with less oxygen than the amount to be completely burned to generate a reducing flame, which is composed of reducing flame burners 20a and 20b for preventing oxidation by spraying on the cutting surface. The reducing flame burner 20a is a roller. In the frame of 15a,
The reducing flame burner 20b is mounted on the carriage 1 via the fixed stand 21.
It is attached to No. 2 and blows a reducing gas toward the cutting surfaces of the preceding rolled material 1a and the succeeding rolled material 1b to keep the cutting surfaces in a reduced state at all times. In FIG. 5, a truck 12 has a plurality of wheels 13 and travels on a rail 3 extending in the rolling direction. When pressing, drive to the left in the drawing as indicated by the arrow. B is the rolling height of the rolling apparatus, and the plurality of rollers 4 support the rolled material 1 at the rolling height B and move it in the rolling direction. The rail 3 is arranged at a position straddling the roller 4, and the press contact height L is made higher than the rolling height B so that the carriage 12 can travel at a position higher than the rail 3. Rolled material 1a,
1b from the rolling height B of the rolling mill to the tip clamping device 16
To the rolling height B from the trailing end clamp device 14.
Inclination guides 24 and 25 that can swing up and down are provided for guiding to. As a result, the existing rolling mill can be operated as it is.

[0020]

As is apparent from the above description, the present invention provides a cutting device for cutting at least one of the trailing end of the preceding rolled material and the leading end of the succeeding rolled material into a concave curved shape, and a downstream of the cutting device. The trailing edge of the preceding rolled material and the leading edge of the following rolled material are overlapped at both ends of the strip width of the rolled material so that the overlapping margin becomes smaller from the both ends toward the center. At the center, since there is a rolled material joining device that presses and joins in a separated state where there is no superposition, at least one of the trailing end of the preceding rolled material and the leading end of the following rolled material is concave by the cutting device. It is cut into a curved shape, and therefore, the setup for both rolled materials when pressure-welded by the rolled material joining device, that is, the trailing end of the preceding rolled material and the leading end of the following rolled material are Superimposed in the center as well as to cost superposed as superimposed by the end going from the both ends to the center is small it is easy to state, but apart no. In this way, the overlapping area of the trailing end of the preceding rolled material and the leading end of the succeeding rolled material that have been pressed against each other is significantly smaller than that of the conventional one. As a result, the press device and its related device can be made compact, and the equipment cost can be reduced. Further, the joining strength of the pressure contact portion is ensured to be a necessary and sufficient value because both ends of the strip width of the rolled material are superposed and joined. Further, the position of the joint portion can be tracked by detecting the distance between the central portions. That is, by arranging an infrared temperature sensor or a CCD camera at the entrance of the finishing mill and detecting the central interval, the arrival timing of the detection unit can be accurately known.

[Brief description of drawings]

FIG. 1 is a side view showing the relationship between an embodiment of the present invention and other devices in a hot rolling facility.

2A is a side sectional view of a cutting device, and FIG. 2B is a development view of a rotary drum.

FIG. 3A is a side sectional view of a cutting device, and FIG. 3B is a plan view showing a cutting shape of a trailing end of a preceding rolled material.

FIG. 4A is a side sectional view of a cutting device, and FIG. 4B is a plan view showing a cutting shape of a trailing end of a subsequent rolled material.

FIG. 5 is a side view of a rolled material joining device.

FIG. 6 is a plan view showing the shape of an overlapping portion.

FIG. 7 is a plan view showing a shape of a conventional overlapping portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolled material 1a Preceding rolled material 1b Subsequent rolled material 6 Cutting device 6a Rotating drum 6b Blade 6c Blade 7 Rotating shaft 10 Rolled material joining device 12 Carriage 14 Rear end clamp device 16 Tip clamp device 18 Cutting device 20 Reduction holding device 22 Pressure welding device

Front page continuation (72) Nobuhiro Tazo, No. 1 Nobuhiro Shin Nakahara-cho, Isogo-ku, Yokohama, Kanagawa Ishikawajima-Harima Heavy Industries Co., Ltd. Yokohama Engineering Center No. 5-33 Sumitomo Metal Industries, Ltd. (72) Inventor Koichi Sakamoto 3 Hikari, Kashima-cho, Kashima-gun, Ibaraki Prefecture Sumitomo Metal Industries, Ltd. Kashima Works

Claims (3)

[Claims] 1. A cutting device for cutting at least one of a trailing end of a preceding rolled material and a leading end of a following rolled material into a concave curved shape, and a trailing end of a preceding rolled material provided downstream of the cutting device. Part and the leading edge of the rolled material that follows it at both ends of the strip width of the rolled material so that the overlap margin becomes smaller as going from the both ends to the center, and there is no overlap at the center An apparatus for joining rolled material, comprising: a rolled material joining device for pressure welding. 2. The cutting device comprises a pair of rotating drums having blades on the outer periphery and meshing with each other, and the blades are arranged on each rotating drum at a distance of approximately 180 degrees, and each blade has a wire connecting both ends. 2. The equipment for joining rolled material according to claim 1, wherein is parallel to the rotation axis of the rotary drum and has an arc shape, and the two blades on each rotary drum are symmetrical with respect to the rotation axis. 3. The rolling material joining device includes a trolley that travels in the rolling direction, and a trailing end clamp device that is mounted on the trolley and horizontally clamps the trailing end of the preceding rolling material. A tip clamp device mounted on the trolley to horizontally clamp the leading end of the following rolled material, and a scale for cutting the trailing end lower surface of the preceding rolled material and the leading end upper surface of the following rolled material A cutting device that removes the cutting surface, a reduction holding device that holds the cutting surface in a reduced state, and a pressure welding device that overlaps the processed surfaces of the preceding rolled material and the succeeding rolled material and compresses them to approximately the same thickness, and The pressure welding device superimposes the trailing edge of the preceding rolled material and the leading edge of the following rolled material at both ends of the strip width of the rolled material so that the overlap margin becomes smaller from the ends toward the center and the center of the overlap is reduced. There is no remote state The equipment for joining rolled material according to claim 1, wherein the equipment is adapted for pressure welding.