JPH0871855A - Rolled material jointing device and jointing method - Google Patents

Abstract

PURPOSE: To provide a rolled material jointing device and a jointing method which can joint the rear end part of preceding rolled material and the tip part of succeeding rolled material to each other in a short time with sufficient joint strength over the whole width of the rolled material and can roll the joint part almost uniformly with little unevenness at the joint part. CONSTITUTION: A rolled material jointing method is constituted of a processing process (A) of cutting the rear end part lower face of a preceding rolled material 1 and the tip part upper face of succeeding rolled material 2 by a surface processing device 18 while holding the machined face 1a or the like in the reduced state or nonoxidized state by reduction holding device 20, a positioning process (B) of overlapping the processed faces of the preceding rolled material and succeeding rolled material, a moving process (C) of moving the preceding rolled material and succeeding rolled material synchronously in the horizontal direction by moving devices 14, 16, with the processed faces as they are overlapped, and a jointing process (D) of compressing the overlapped part almost to the same thickness as the rolled material to joint by a pressure welding device 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling material joining apparatus and a joining method for joining a trailing end portion of a preceding rolled material and a leading end portion of a succeeding rolled material in a hot rolling facility.

[0002]

2. Description of the Related Art In a conventional hot rolling facility (hot strip mill), bar materials rolled by a rough rolling mill are separately supplied to a finishing rolling mill to obtain a strip material having a desired plate thickness. . However, with such means, the entire rolled material cannot be rolled uniformly, defects are likely to occur at the end portions (front end portion and rear end portion) of the rolled material, the yield of the rolled material is reduced, and biting / flanking etc. occur. Therefore, there is a problem that it is difficult to increase the rolling speed.

In order to solve such a problem, a joining device for joining the trailing end of the preceding rolled material and the leading end of the next rolled material in order to continuously feed the rolled material to the finish rolling mill has been conventionally proposed. (For example, JP-A-62-252603, JP-A-63-93408, JP-B-5-13).
No. 9).

[0004]

However, Japanese Patent Laid-Open No. 62-62
The "plate joining method" of No. 252603 is to insert a joint between the ends of the plates to be joined and join them, but in order to secure sufficient joining strength over the entire width of the rolled material, There is a problem that the joint needs to be driven in a short time, automation (mechanization) is difficult, and the joint cannot be uniformly rolled.

Further, the "bar joining equipment" of Japanese Patent Laid-Open No. 63-93408 forms a loop on a rolled material and press-contacts the rear end and the tip, but a relatively thick bar material is formed on the loop. Therefore, there is a problem that the bar material tends to have a bending tendency and sufficient bonding time cannot be secured, and even if the rear end and the tip are simply pressure-bonded, sufficient bonding strength cannot be secured over the entire width of the rolled material. .

[0006] Further, Japanese Patent Publication No. 5-139 "Bath strip welding device" is a device for welding and joining a rear end and a tip while traveling with a rolled material, but for welding a wide rolled material. Since it takes time, there is a problem that the entire equipment tends to be long, and unevenness is likely to occur at the joint, which makes it difficult to uniformly roll the joint.

The present invention was created to solve the above-mentioned various problems. That is, the object of the present invention is to join the trailing end of the preceding rolled material and the leading end of the following rolled material with sufficient bonding strength over the entire width of the rolled material in a short time, and to reduce the unevenness of the bonded portion. It is an object of the present invention to provide a rolled material joining apparatus and a joining method capable of rolling a joined portion substantially uniformly.

[0008]

According to the present invention, a surface processing apparatus for cutting the lower surface of the trailing end of the preceding rolled material and the upper surface of the leading end of the succeeding rolled material, and the processed surface in a reduced state or a non-oxidized state. A plurality of reduction holding devices, a preceding material moving device that can move vertically and horizontally while holding the trailing end of the preceding rolled material horizontally, and the machined surfaces of the preceding rolled material and the succeeding rolled material are superimposed. The succeeding material moving device that can horizontally move the succeeding rolled material in synchronism with the preceding rolled material, and the pressure welding device that is provided on the downstream side of the surface processing device and that compresses and joins the overlapping portion to approximately the same thickness as the rolled material. And a rolled material joining device.

According to a preferred embodiment of the present invention, the reduction holding device is a reducing flame burner for incompletely burning fuel to form a reducing state, and at least one of them is attached to a succeeding material moving device. There is. Further, the surface processing device is provided on the lower side of the preceding rolled material and is provided on the upper side of the cylindrical lower cutter and the succeeding rolled material that rotate around the axis of the width direction. It consists of a cylindrical upper cutter that can rotate and move up and down.

Further, according to the present invention, the lower surface of the trailing end portion of the preceding rolled material and the upper surface of the leading end portion of the succeeding rolled material are cut while the processed surface is kept in the reduced state or the non-oxidized state, and the preceding rolled material and the subsequent rolled material are processed. The processed surfaces of the rolled materials are overlapped, the preceding rolled material and the subsequent rolled material are horizontally moved in synchronization while the processed surfaces are overlapped, and the overlapping part is compressed to approximately the same thickness as the rolled material and joined. A characteristic rolling material joining method is provided.

[0011]

According to the above-mentioned apparatus and method of the present invention, a processing step of cutting the lower surface of the trailing end of the preceding rolled material and the upper surface of the leading end of the succeeding rolled material, and the processed surface of the preceding rolled material and the succeeding rolled material are overlapped. 4 of the positioning process of combining, the moving process of synchronously moving the preceding rolled material and the succeeding rolled material horizontally while the processed surfaces are superposed, and the joining step of compressing and joining the superposed portion to the same thickness as the rolled material. Since the entire width of the rolled material can be joined in the process, the joining time can be shortened and the total length of rolling equipment can be shortened. Further, the surface processing device and the pressure welding device can be separated by the preceding material moving device and the succeeding material moving device.

Further, while the machined surface is held in the reduced state or the non-oxidized state by the reducing and holding device, the rear surface of the rear end portion and the upper surface of the front end portion are cut by the surface processing apparatus, and the machined surface is made almost the same as the rolled material by the pressure welding apparatus. Since it is compressed to the same thickness, it is possible to perform pressure welding with almost no oxidation of the processed surface, and it is possible to join with sufficient joining strength over the entire width of the rolled material. Further, since the processed surfaces are superposed by the pressure welding device and compressed and bonded to the same thickness as the rolled material, there is almost no unevenness in the bonded portion and the bonded portion can be rolled substantially uniformly.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. In addition, in each figure, the same parts are denoted by the same reference numerals, and the duplicated description will be omitted. FIG. 1 is an overall configuration diagram of a rolled material joining apparatus according to the present invention. In FIG. 1, a rolled material joining apparatus 10 of the present invention is provided with a preceding rolled material 1
A surface processing device 18 for cutting the lower surface of the rear end portion and the upper surface of the front end of the subsequent rolled material 2, a plurality of reduction holding devices 20 for holding the processing surfaces 1a, 2a in a reduced state or a non-oxidized state, and a preceding rolled material The leading material moving device 14 capable of vertically moving and horizontally moving while holding the rear end portion of 1 horizontally, and the trailing rolled material 2 with the machined surfaces 1a and 2a of the leading rolled material 1 and the trailing rolled material 2 superposed on each other. Pressure welding for compressing and joining the succeeding material moving device 16 capable of moving horizontally in synchronization with the preceding rolled material 1 and the overlapping portion 3 provided on the downstream side of the surface processing device 18 to approximately the same thickness as the rolled materials 1, 2. And a device 22.

The surface processing device 18 is provided on the lower side of the preceding rolled material 1, and has a cylindrical lower cutter 19a which is rotated by a driving device (not shown) about the axis Z in the width direction, and the succeeding rolled material 2
And a cylindrical upper cutter 19b which is provided on the upper side of, and which is rotatable by a drive device (not shown) about an axis Z in the width direction and is vertically movable. The cutters 19a and 19b are longer than the entire widths of the rolled materials 1 and 2, and have a plurality of blades with the same diameter on the outer peripheral portion thereof, and are cut by the single cutters 19a and 19b over the entire widths of the rolled materials 1 and 2, respectively. It is supposed to do. Further, the upper cutter 19b is provided between a processing position L for processing the upper surface of the leading end portion of the succeeding rolled material 2 and a standby position H which is moved obliquely upward in the drawing so that the reduction holding device 20 and the like can pass thereunder. It can be moved up and down by a driving device (not shown) (for example, a hydraulic cylinder). With this configuration, both the rear end lower surface of the rolled material 1 and the upper end surface of the succeeding rolled material 2 are cut by the cutters 19a and 19b, and then the upper cutter 19b and the lower cutter 19a can be moved to the standby position H. it can.

The preceding material moving device 14 is provided between a plurality of supporting rollers 4 and horizontally supports the rear end portion of the preceding rolled material 1. A plurality of supporting members 15a are provided between the supporting members 15a. A clamp roller 15b for sandwiching the rear end of the first roller;
It is composed of an elevating device 15c for vertically moving while holding the rear end of the preceding rolled material 1 horizontally, and a moving device 15d for horizontally moving the elevating device 15c. The lifting device 15c and the moving device 15d are each preferably a combination of a lifting table or a moving table and a hydraulic cylinder. With this configuration,
While the rear end of the preceding rolled material 1 is horizontally supported by the supporting member 15a and the clamp roller 15b, the lower cutter 19a cuts the lower surface of the rear end of the rolled material 1, and then the lifting device 15c moves the supporting roller 4 (feeding roller 4). It is possible to avoid interference with the rollers, raise the thickness of the succeeding rolled material 2 to at least the plate thickness of the succeeding rolled material 2, and further move horizontally in the direction of the press contact device 22 by the moving device 15d.

The subsequent material moving device 16 includes a plurality of support rollers 17a for horizontally supporting the leading end portion of the succeeding rolled material 1, and a clamp roller 17b for sandwiching the leading end portion of the succeeding rolled material 1 between the supporting rollers 17a. , Succeeding rolled material 2 to preceding rolled material 1
And a moving device 17c for horizontally moving in synchronism with.
With this structure, the upper cutter 19b cuts the upper surface of the leading end portion of the succeeding rolled material 2 while horizontally supporting the leading end portion of the succeeding rolled material 2 by the supporting roller 17a and the clamp roller 17b, and then the succeeding rolling operation is performed by the moving device 17c. Material 2
Can be horizontally moved in the direction of the pressure welding device 22 in synchronization with the preceding rolled material 1.

The reduction holding device 20 burns a combustible gas such as COG (coke oven gas), LPG, and LNG with less oxygen than the amount that completely burns it, thereby generating hydrogen radicals, C
A reducing flame burner that forms a reducing state in a reducing flame containing reducing radicals such as H ₂ 0 radicals, and at least one of them is attached to the subsequent material moving device 16.
With such a configuration, the machined surfaces 1a and 2a are held in the reduced state or the non-oxidized state during the cutting process by the surface processing device 18, the moving process by the subsequent material moving device 16, and the pressure welding process by the pressure welding device 22, and the oxidation thereof is performed. Can be prevented and a high bonding strength can be secured.

The pressure welding device 22 sandwiches the upper die 23a which comes into contact with the upper surface of the rear end portion of the preceding rolled material 1, the lower die 23b which comes into contact with the lower surface of the leading end portion of the succeeding rolled material 2, and the upper die 23a and the lower die 23b. And a pressing device 23c for compressing. Further, the upper die 23a is attached to the lower surface of the ram 23e of the press device 23c so as to move up and down together with the ram 23e.
With such a configuration, the machined surfaces 1a, 2a of the preceding rolled material 1 and the succeeding rolled material 2 can be compressed immediately after the moving process. In addition, by this compression, the overlapped portion is rolled material 1,
By compressing to a thickness substantially the same as that of 2, the joint can be rolled substantially evenly with almost no irregularities in the joint.

FIG. 2 is an explanatory view of the operation of the rolled material joining method according to the present invention. The method of the present invention comprises a processing step (A) of cutting a lower surface of a trailing end portion of a preceding rolled material and an upper surface of a leading end portion of a succeeding rolled material while maintaining the worked surface in a reduced state or a non-oxidized state, and a preceding rolled material. And a positioning step (B) for superimposing the processed surfaces of the subsequent rolled materials, a moving step (C) for synchronously moving the preceding rolled material and the subsequent rolled material while the processed surfaces are superposed, and a superposition part is rolled. A joining step (D) of joining the materials by compressing them to almost the same thickness.

In FIG. 2A, the preceding material moving device 14
While the rear end portion of the preceding rolled material 1 is horizontally supported by the supporting member 15a and the clamp roller 15b of the lower cutter 19a.
The lower surface of the rear end of the rolled material 1 is cut by. Further, the upper cutter 19b cuts the upper surface of the leading end portion of the subsequent rolled material 2 while the leading end portion of the trailing rolled material 2 is horizontally supported by the support roller 17a and the clamp roller 17b. Further, during this processing step, the reduction holding device 20 is used to process the processing surfaces 1a, 2
Hold a in the reduced or non-oxidized state.

Next, as shown in FIG. 2B, the elevating device 15c of the preceding material moving device 14 avoids interference with the supporting roller 4 and raises the preceding rolled material 1 to at least the plate thickness of the succeeding rolled material 2. Then, the subsequent rolled material 2 is moved horizontally by the subsequent rolled material moving device 16 to move the following rolled material 1 and the processed surface 1a,
Stack 2a. Further, during this positioning process, the reduction holding device 20 holds the machined surfaces 1a, 2a in a reduced state or a non-oxidized state.

Next, as shown in FIG. 2 (C), the moving device 15d of the preceding material moving device 14 horizontally moves it toward the pressure welding device 22, and the moving device 17c of the following material moving device 16 moves the succeeding rolled material. 2 is horizontally moved in the direction of the pressure welding device 22 in synchronization with the preceding rolled material 1. Even during this moving process, the reduction holding device 2 attached to the subsequent material moving device 16
0 holds the machined surfaces 1a, 2a in a reduced state or a non-oxidized state.

Then, as shown in FIG. 2 (D), while the machined surfaces 1a, 2a are held in the reduced state or the non-oxidized state by the reduction holding device 20, the preceding rolling material 1 and the subsequent rolling material 2 are pressed by the pressure welding device 22. The machined surfaces 1a and 2a are compressed, and the overlapped portions are compressed to the same thickness as the rolled materials 1 and 2 and joined.

With this joining method, the entire width of the rolled material can be joined in the four steps of the working step, the positioning step, the moving step, and the joining step, whereby the joining time can be shortened and the total length of rolling equipment can be shortened. can do. Further, the surface processing device 18 and the pressure welding device 22 can be arranged at a distance by the preceding material moving device and the succeeding material moving device.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0026]

As described above, according to the apparatus and method of the present invention, the entire width of the rolled material can be joined in four steps including the working step, the positioning step, the moving step, and the joining step, so that the joining time can be shortened. Therefore, the total length of rolling equipment can be shortened. Further, the surface processing device and the pressure welding device can be separated by the preceding material moving device and the succeeding material moving device.

Further, while the machined surface is held in the reduced state or the non-oxidized state by the reduction holding device, the rear end lower surface and the tip end upper surface are machined by the surface machining apparatus and the machined surface is made almost a rolled material by the pressure welding apparatus. Since it is compressed to the same thickness, it is possible to perform pressure welding with almost no oxidation of the processed surface, and it is possible to join with sufficient joining strength over the entire width of the rolled material. Further, since the processed surfaces are superposed by the pressure welding device and compressed and bonded to the same thickness as the rolled material, there is almost no unevenness in the bonded portion and the bonded portion can be rolled substantially uniformly.

Therefore, according to the joining apparatus and joining method for rolled material of the present invention, it is possible to join the trailing end of the preceding rolled material and the leading end of the following rolled material with sufficient bonding strength over the entire width of the rolled material in a short time. It has an excellent effect such that there is little unevenness in the joint and the joint can be rolled substantially uniformly.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a rolled material joining device according to the present invention.

FIG. 2 is an operation explanatory view of a rolled material joining method according to the present invention.

[Explanation of symbols]

 1 Pre-rolled material 1a Processed surface 2 Subsequent rolled material 2a Processed surface 3 Stacking part 4 Support roller 10 Rolled material joining device 14 Preceding material moving device 15a Supporting member 15b Clamp roller 15c Lifting device 15d Moving device 16 Subsequent material moving device 17a Support Roller 17b Clamp roller 17c Moving device 18 Surface processing device 19a Lower cutter 19b Upper cutter 20 Reduction holding device 22 Pressing device 23a Upper mold 23b Lower mold 23c Press device 23e Ram H Standing position of upper cutter L Processing position of upper cutter

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masami Oki, 1-3 1-3 Otemachi, Chiyoda-ku, Tokyo Sumitomo Metal Industries, Ltd. (72) Inventor, Koichi Sakamoto, Koujima-machi, Kashima-gun, Ibaraki Prefecture Sumitomo Metal Industries, Ltd. Kashima Steel Works

Claims (4)

[Claims] 1. A surface processing device for cutting the lower surface of the trailing end of the preceding rolled material and the upper surface of the leading end of the subsequent rolled material, and a plurality of reduction holding devices for holding the processed surfaces in a reduced state or a non-oxidized state. Synchronize the trailing rolled material with the preceding rolled material with the leading material moving device that can move vertically and horizontally while holding the trailing end of the preceding rolled material horizontally And a horizontal movement device for moving the succeeding material, and a pressure welding device that is provided on the downstream side of the surface processing device and that compresses and joins the overlapping portion to approximately the same thickness as the rolled material. Rolled material joining device. 2. The reduction holding device is a reducing flame burner that forms a reducing state by incompletely burning fuel, and at least one of them is attached to a succeeding material moving device. Item 1. A rolled material joining device according to item 1. 3. The surface processing device is provided on the lower side of the preceding rolled material, and has a cylindrical lower cutter that rotates about an axis in the width direction. The rolled material joining device according to claim 1, comprising a cylindrical upper cutter that is rotatable about a center and is vertically movable. 4. The machining of the preceding rolled material and the succeeding rolled material by cutting the lower surface of the trailing end portion of the preceding rolled material and the upper surface of the leading end of the succeeding rolled material with the cutting surface kept in a reduced state or a non-oxidized state. Rolling characterized by overlapping the surfaces, moving the preceding rolled material and the succeeding rolled material horizontally in synchronism while the processed surfaces are overlapped, and compressing and joining the overlapped part to approximately the same thickness as the rolled material. Material joining method.