JP3656765B2 - Rolling material joining device - Google Patents

Description

[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a facility for press-welding a leading rolled material and a leading end of a succeeding rolled material in a hot rolling facility, and more particularly to a rolled material joining device provided with a reduction holding device that prevents oxidation of a pressed surface.
[0002]
[Prior 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, since the rolling operation is performed for each slab unit, it has been desired to perform a continuous rolling operation. In addition, when rolling in slab units in this way, defects are likely to occur at the ends (front end and rear end) of the rolled material, the yield of the rolled material is reduced, and the rolling speed is increased due to biting, bottom-out, etc. There was a problem that was difficult to convert. For this reason, there has been proposed a joining apparatus that joins the rear end of the rolled material rolled by the rough rolling mill and the front end of the next rolled material and supplies them to the finishing mill.
[0003]
[Problems to be solved by the invention]
Japanese Patent Application Laid-Open No. Sho 62-252603 discloses a “plate joining method” in which joints are driven between the ends of the plates to be joined. In order to ensure sufficient joint strength over the entire width of the rolled material. However, it is necessary to drive a large number of joints in a short time, and automation (mechanization) is difficult, and the joint part cannot be rolled uniformly. In addition, the “bar joining facility” of JP-A-63-93408 forms a loop in the rolled material and press-contacts the rear end and the front end, but in order to form a relatively thick bar material in the loop, There is a problem that the bar material is likely to be bent and a sufficient joining time cannot be secured, and even if the rear end and the leading end are pressed together, a sufficient joining strength cannot be secured over the entire width of the rolled material. Furthermore, the “Bet plate running welding device” of Japanese Patent Publication No. 5-139 is a device that welds and joins the rear end and the leading end while running with the rolled material, but it takes time to weld a wide rolled material. For this reason, there is a problem that the entire equipment tends to be long and unevenness is likely to occur at the joint, making it difficult to uniformly roll the joint. In addition, when the above-described joining device is added to an existing line, there is a problem that the existing line is remodeled and the production downtime becomes longer.
[0004]
In the case of overlap pressure welding, the rear end of the preceding rolled material and the leading end of the subsequent rolled material are overlapped and compression bonded, but the surface of the rolled material is covered with an oxide film. For this reason, after removing the oxide film on the bonding surface, pressure welding is performed. When the oxide film is mechanically removed with a cutter or the like, reducing combustion gas is sprayed on the processed surface during the removal. Such spraying is performed by a nozzle provided on the reducing flame burner header. Since the joining surface becomes the lower end surface of one rolled material and the upper end surface of the other rolled material, the interval in the vertical direction of both rolled materials is widened so that a cutter for processing the processed surface can be inserted between them. After processing, the cutter is returned to the retracted position, and the processed surfaces are overlapped and compressed. During this time, it is necessary to blow the reducing flame from the nozzle onto the work surface. However, there may be a case where the reducing flame cannot be sufficiently supplied to the work surface due to interference with a device for setting the vertical interval of the rolled material to be processed, a cutter device or the like.
[0005]
The present invention has been made to solve the various problems described above. 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 succeeding rolled material while traveling together with the rolled material, and with sufficient joining strength over the entire width of the rolled material in a short time. It is possible to reduce the unevenness of the joint and to process the joint almost uniformly. It is another object of the present invention to reduce the flame sufficiently to the joint surface during processing.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a cart that travels in the rolling direction, a rear end portion of the rolling material that is mounted on the carriage and precedes it, a roller portion that supports the lower surface of the rolling material, and an upper surface of the rolling material A rear end clamping device that is horizontally clamped and clamped by a clamp for pressing, a front end clamping device that is mounted on the carriage and horizontally clamps a leading end portion of a subsequent rolled material, and a lower surface of a rear end portion of a preceding rolled material And a processing device for cutting the upper surface of the tip of the subsequent rolled material, a reduction holding device for holding the processed surface in a reduced state, and the processed surfaces of the preceding rolled material and the succeeding rolled material are overlapped and compressed to substantially the same thickness. A pressure welding device, and the reduction holding device includes a plurality of nozzles that spray reducing gas on a processed surface, and a first header and a second header that are implanted in the nozzle and arranged in the width direction of the rolled material. , First header and second The hudder is attached to the roller portion of the rear end clamping device, the nozzle of the first header is directed to the processing surface on the lower surface of the preceding rolled material, and the nozzle of the second header is directed to the processing surface of the upper surface of the subsequent rolled material. .
[0007]
According to a second aspect of the present invention, the nozzle of the second header includes a rotation mechanism that makes the direction thereof face the processing surface of the upper surface of the subsequent rolled material in accordance with the lowering of the roller portion.
[0008]
[Action]
In the invention of claim 1, the rolling material joining device is configured such that the carriage travels in the rolling direction while sandwiching the preceding rolled material and the succeeding rolled material by the rear end clamping device and the front end clamping device. Can be supplied to finishing mills. In addition, the joint surface is cut by a processing device and compressed by a rolling device. This enables continuous cutting and press-contacting, enabling press-contact in a short time and high-speed press-contact. At this time, since the processed surface is brought into a reduced state and pressed by the reduction holding device, a sufficient bonding strength can be obtained. Further, since the pressure welding apparatus superimposes the processed surfaces of the preceding rolled material and the succeeding rolled material and compresses them to substantially the same thickness, a substantially uniform joint can be obtained. In addition, the first header and the second header of the reduction holding device are attached to the roller portion of the rear end clamp device and are lifted and lowered together with the roller portion, so that they do not interfere with peripheral devices such as a processing device. Since the nozzle of the first header faces the processing surface on the lower surface of the preceding rolled material, and the nozzle of the second header faces the processing surface of the upper surface of the subsequent rolled material, the reducing flame from each nozzle is sufficiently supplied to each processing surface. The
[0009]
In the invention of claim 2, since the direction of the nozzle of the second header rotates and faces the processing surface of the upper surface of the subsequent rolled material in accordance with the lowering of the roller portion, the processing of the joining surface is completed and both surfaces are brought into contact with each other. Sometimes a reducing flame is supplied to the processed surface. In addition, since the lower surface of the preceding rolled material and the first header descend integrally, the direction of the nozzle of the first header is always directed to the lower surface of the preceding rolled material, and a reducing flame is supplied.
[0010]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same numerals have the same meaning.
FIG. 1 is a side view showing a configuration of a rolled material joining apparatus. In FIG. 1, a rolled material joining apparatus 10 includes a carriage 12 that travels in the rolling direction, and a rear end clamping apparatus 14 that can be moved up and down by horizontally holding a rear end portion of a rolled material 1 a that is attached on the carriage 12 and precedes. And a tip clamping device 16 that horizontally attaches the tip of the subsequent rolled material 1b mounted on the carriage 12, and a processing device that cuts the lower surface of the rear end portion of the preceding rolled material 1a and the upper surface of the tip portion of the subsequent rolled material 1b. 18, a reduction holding device 20 that holds the processed surface in a reduced state, and a pressure welding device that compresses and joins the processed surfaces of the preceding rolled material 1a and the subsequent rolled material 1b to the same thickness as the rolled materials 1a and 1b. 22.
[0011]
The rear end clamping device 14 includes a plurality of roller portions 15a that horizontally support the rear end portion of the preceding rolled material 1a, and a clamp 15b that sandwiches the rear end portion of the preceding rolled material 1a between the roller portions 15a and moves up and down. And the processing height H which makes the rear-end lower surface of the preceding rolling material 1a contact the upper surface of the cutter 19a mentioned later, and hold | maintains the rear-end part of the preceding rolling material 1a at substantially the same height as the front-end | tip part of the subsequent rolling material 1b. Between the pressure contact height L, it consists of the raising / lowering cylinder 15c which moves the roller part 15a and the clamp 15b up and down. With this configuration, the rear end of the preceding rolled material 1a can be clamped by the clamp 15b while the rear end of the preceding rolled material 1a is horizontally supported by the roller portion 15a. Further, the roller portion 15a and the clamp 15b are held at the processing height H by the elevating cylinder 15c, and the rear end portion lower surface of the preceding rolled material 1a and the upper end surface of the subsequent rolled material 1b are cut by a single cutter 19a. In addition, the processed surfaces of the preceding rolled material 1a and the succeeding rolled material 1b can be superposed while being held at the pressure height L, and compressed and joined by the pressure welding device 22.
[0012]
The front end clamping device 16 includes a roller portion 17a that horizontally supports the front end portion of the subsequent rolled material 1b, and a clamp 17b that sandwiches the front end portion of the subsequent rolled material 1b between the roller portion 17a. With this configuration, it is possible to hold the leading end portion of the subsequent rolled material 1b by the clamp 17b while holding the subsequent rolled material 1b horizontally by the roller portion 17a.
[0013]
The processing device 18 includes a cylindrical cutter 19a that rotates about the axis in the width direction of the rolled materials 1a and 1b, a swing device 19b that swings the cutter 19a in an oblique direction, and a cutter 19a that moves back and forth in the rolling direction. And a reciprocating device 19c that moves forward. The cutter 19a is attached to the tip of the arm of the swinging device 19b and is rotated by a rotation driving device (not shown). The cutter 19a uses the swinging device 19b and the reciprocating device 19c to cut the rear end lower surface of the preceding rolled material 1a and the upper end surface of the subsequent rolled material 1b at the processing position indicated by the thicker line in FIG. Retreat to the position indicated by the thin line.
[0014]
In the pressure welding device 22, an upper die 23a having a lower surface in contact with the upper surface of the rear end portion of the preceding rolled material 1a, a lower die 23b having an upper surface in contact with the lower surface of the leading end portion of the subsequent rolled material 1b, an upper die 23a, and a lower die 23b. It comprises a press device 23c that pinches and compresses. The lower mold 23 b is fixed to the carriage 12. The upper die 23a is attached to the lower surface of the ram 23e of the press device 23c and moves up and down together with the ram 23e. With this configuration, during processing by the processing apparatus 18, the rear end portion of the preceding rolled material 1a and the front end portion of the subsequent rolled material 1b can be supported by the upper mold 23a and the lower mold 23b, and the press apparatus 23c can support the ram. By lowering 23e, the processed 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.
[0015]
The reduction holding device 20 burns the combustible gas such as coke oven gas, LPG, and LNG with less oxygen than the amount that completely burns, generates a reducing flame, and sprays it on the processed surface to prevent oxidation. In FIG. 1, a carriage 12 has a plurality of wheels 13 and travels on a rail 3 extending in the rolling direction. At the time of press contact, as shown by the arrow, the vehicle travels to the left on the drawing. B is the rolling height of the rolling device, and a 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 disposed 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. Inclined guides 24 and 25 are provided that guide the rolled material 1a and 1b from the rolling height B of the rolling device to the front end clamping device 16 and guide from the rear end clamping device 14 to the rolling height B. ing. Thereby, the existing rolling apparatus can be operated as it is.
[0016]
FIG. 2 is a diagram illustrating the reduction holding device 20. The reduction holding device 20 includes a reducing gas supply device (not shown), a first header 21a, a second header 21b, a first nozzle 21c provided in the first header 21a, and a second nozzle 21d provided in the second header 21b. Is done. The first header 21a and the first nozzle 21c spray a reducing flame on the processed surface on the lower surface of the rear end of the preceding rolled material 1a, and the second header 21b and the second nozzle 21d reduce the reducing flame on the processed surface on the upper surface of the leading end of the subsequent rolled material 1b. Spray. The first header 21a and the second header 21b are attached to the roller portion 15a of the rear end clamping device 14 with the axial direction being the plate width direction of the rolled material 1, and the processing height H and pressure contact height L are set by the lifting cylinder 15c. Move up and down. The direction of the first nozzle 21c attached to the first header 21a is fixed and does not change during the elevation. This is because the pre-rolled material 1a is sandwiched between the roller portion 15a and the clamp 15c, and the relative relationship with the first nozzle 21c does not change even during elevation. On the other hand, the second header 21b is rotatably attached to the roller portion 15a, and changes the direction of the second nozzle 21d corresponding to the lift position so as to face the processing surface of the upper end surface of the subsequent rolled material 1b.
[0017]
3A and 3B are views showing the relationship between the header and the nozzle, where FIG. 3A is a sectional view and FIG. 3B is a perspective view. The first header 21a and the second header 21b are respectively provided with a first nozzle 21c and a second nozzle 21d at a certain pitch up to a range slightly beyond the plate width of the rolled material 1, and supplied to the headers 21a and 21b. The reducing gas is burned from the nozzles 21c and 21d and sprayed on each processed surface. In the case of FIG. 3, the first nozzle 21c and the second nozzle 21d intersect but do not interfere. The second header 21b rotates to change the direction of the second nozzle 21d.
[0018]
FIG. 4 shows another relationship between the header and the nozzle. (A) is sectional drawing, (B) is a perspective view. The first header 21a is provided on the upper side, the second header 21b is provided on the lower side, the first nozzle 21c is directed obliquely upward, and the second nozzle 21d is directed obliquely downward so as not to cross each other. The second header 21b is rotated to change the direction of the second nozzle 21d.
[0019]
FIG. 5 is a view showing the link mechanism 30 that rotates the second header 21b and changes the direction of the second nozzle 21d according to the elevation of the roller portion 15a. Point e is the center position of the top surface of the subsequent rolled material 1b, point f is a predetermined position below point e, and points e and f are fixed. Point g1 moves up and down with the roller portion 15b at the axial center position of the second header 21b. The h1 point is below the g1 point, and the lengths of g1 to h1 are made equal to the lengths of ef. Thus, a parallelogram having apexes of e, f, g1, and h1 is formed, and the direction of the second nozzle 21d is on the g1 to e lines. When the roller portion 15a is lowered and the second header 21b is lowered, the parallelogram becomes e, f, g2, and h2 indicated by broken lines, and the direction of the second nozzle 21d is on the lines g2 to e. As a result, the second nozzle 21d is always directed to the center position of the processed surface of the top end of the subsequent rolled material 1b during the elevation. The link mechanism 30 is arranged outside the plate width of the rolled material 1. At this time, in the case of FIG. 3, the second header 21b is made longer than the first header 21a so as not to interfere with the first header 21a. In addition to such a link mechanism, the rotation angle of the second header 21b is determined so that the second nozzle 21d always faces the center of the processing surface of the top surface of the subsequent rolled material 1b according to the lift position of the roller portion 15a. The same effect as that of the link mechanism 30 can be obtained by rotating the second header 21b with a motor or the like and controlling the rotation position according to the position of the roller portion 15a by the control device.
[0020]
【The invention's effect】
As is clear from the above description, the present invention only needs to be provided with equipment for running the carriage on the existing equipment, so there is little influence on the existing equipment, and the installation of the equipment of the present invention can be performed without stopping the existing line. Is possible. In addition, high-speed pressure welding is achieved by continuously processing and compressing the pressure contact surface, sufficient bonding strength is achieved by pressing the processed surface in a reduced state, and the overlap surface is compressed to almost the same thickness as the rolled material. Stable bonding strength can be obtained by setting the thickness to a sufficient value. Further, by attaching the reducing flame header to the roller portion of the rear end clamping device, the processed surface can be sealed with the reducing flame without interfering with other devices. Furthermore, by rotating the header for the processed surface of the subsequent rolled material in accordance with the raising and lowering of the roller portion, the nozzle direction always faces the processed surface, so that the state of the optimum reducing flame can be maintained.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of a rolled material joining apparatus.
FIG. 2 is a diagram for explaining a reduction holding side view;
FIG. 3 is a diagram illustrating a relationship between a header and a nozzle.
FIG. 4 is a diagram illustrating another relationship between a header and a nozzle.
FIG. 5 is an explanatory diagram of a link mechanism that changes the direction of a nozzle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rolled material 1a Pre-rolled material 1b Subsequent rolled material 3 Rail 4 Roller 10 Rolled material joining apparatus 12 Carriage 13 Wheel 14 Rear end clamp apparatus 16 Front end clamp apparatus 18 Processing apparatus 20 Reduction | restoration holding apparatus 21a 1st header 21b 2nd header 21c 1st 1 nozzle 21d 2nd nozzle 22 pressure welding device 24, 25 inclined guide 30 link mechanism (rotating mechanism)
H Processing height L Pressure height B Rolling height

Claims (2)

After the carriage that travels in the rolling direction and the rear end of the preceding rolled material mounted on the carriage is horizontally held by a roller portion that supports the lower surface of the rolled material and a clamp that holds the upper surface of the rolled material, and can move up and down. An end clamp device, a tip clamp device that horizontally attaches the tip of the subsequent rolled material attached on the carriage, and a processing device that cuts the lower surface of the rear end of the preceding rolled material and the upper surface of the tip of the subsequent rolled material. And a reduction holding device that holds the processed surface in a reduced state, and a pressure welding device that compresses the processed surfaces of the preceding rolled material and the subsequent rolled material to the same thickness by overlapping them,
The reduction holding device includes a plurality of nozzles that spray reducing gas on a processing surface, a first header and a second header that are implanted in the nozzle and arranged in the width direction of the rolled material. The two headers are attached to the roller portion of the rear end clamping device, the nozzle of the first header faces the processing surface on the lower surface of the preceding rolled material, and the nozzle of the second header faces the processing surface of the upper surface of the subsequent rolled material. A rolled material joining apparatus. 2. The rolling material joint according to claim 1, wherein the nozzle of the second header includes a rotating mechanism that makes the direction thereof face the processing surface of the upper surface of the subsequent rolling material in accordance with the lowering of the roller portion. apparatus.

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