JP3753474B2 - Rolling material joining device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rolled material joining apparatus for joining a trailing end of a preceding rolled material and a leading end of a succeeding rolled material while traveling with the rolled material in a hot rolling facility.
[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 for each slab unit 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, the rolling production efficiency is inferior. Therefore, it has been desired to perform the rolling operation continuously. In addition, when rolling in slab units in this way, defects are easily generated at the ends of the rolled material (leading end portion and trailing end portion), and the yield of the rolled material is reduced, and the rolling speed is increased due to biting and slipping off. There was a problem that was difficult to convert. For this reason, a rolling material joining apparatus has been developed in which the rear end portion of the preceding rolled material rolled by the rough rolling mill and the front end portion of the subsequent rolled material are joined and supplied to the finishing mill.
[0003]
FIG. 3 shows an example of such a rolled material joining apparatus. The rolled material joining apparatus 10 includes a carriage 12 that travels in the rolling direction, a rear end pinch roll 14 that is mounted on the carriage 12 and that can be moved up and down by horizontally holding a rear end portion of the preceding rolled material 1, and the carriage 12. A front end pinch roll 16 that horizontally holds the front end portion of the rolled material 2 attached on the top, and a processing device 18 that cuts the lower surface of the rear end portion of the preceding rolled material 1 and the upper surface of the front end portion of the subsequent rolled material 2. And a pressure welding device 22 that compresses and joins the processed surfaces of the preceding rolled material 1 and the succeeding rolled material 2 to approximately the same thickness as the rolled materials 1 and 2.
[0004]
The elevating cylinder 14a attached to the side surface of the frame 24 of the pressure welding device 22 has a processing height H for bringing the lower surface of the rear end portion of the preceding rolled material 1 into contact with the upper surface of a cutter 19a described later and the rear end portion of the preceding rolled material 1. The rear end pinch roll 14 is moved up and down between the front end portion of the subsequent rolled material 2 and the pressure contact height L held at substantially the same height. The rear end pinch roll 14 is composed of two upper and lower rolls, and the upper roll moves up and down. When the upper roll is lowered, the rear end portion of the preceding rolled material 1 is horizontally held, and when the upper roll is raised, the lower roll is a guide roll for the rolled material. With this configuration, the preceding rolling material 1 is held at the processing height H by the elevating cylinder 14a while the rear end portion of the preceding rolling material 1 is horizontally supported by the rear end pinch roll 14, and the preceding rolling material 1 is obtained by the cutter 19a. The lower surface of the rear end portion and the upper surface of the front end portion of the succeeding rolled material 2 can be cut, and then the rear end pinch roll 14 is lowered while the rear end portion of the preceding rolled material 1 is held horizontally. The processed surfaces of the rolled material 1 and the subsequent rolled material 2 can be overlapped and compressed and joined by the pressure welding device 22.
[0005]
The front-end pinch roll 16 has the same configuration as the rear-end pinch roll 14, and the upper roll descends to sandwich the front end portion of the subsequent rolled material 2 horizontally. Become.
[0006]
FIG. 4 shows a state in which the rear end portion of the preceding rolled material 1 and the front end portion of the subsequent rolled material 2 are set in the upper die device 26 and the lower die device 27 so that the joint surfaces can be cut by the cutter 19a. Both rolled materials 1 and 2 are horizontal.
[0007]
[Problems to be solved by the invention]
FIG. 5 shows a state in which the rear end portion of the preceding rolled material 1 is set at the lower portion of the upper mold apparatus 26. (A) shows a state in which the rear end portion of the preceding rolled material 1 passes through the front end pinch roll 16, and (B) shows a state in which the rear end portion of the preceding rolled material 1 is set at the lower portion of the upper die device 26. . The tip pinch roll 16 works to give a bending habit so that the rolling material 1 passing through becomes horizontal, and gives the preceding rolling material 1 a bending habit as shown by a broken line. For this reason, when the rear end part of the preceding rolling material 1 comes to the lower part of the upper mold apparatus 26, it becomes a shape which hangs down as shown in (B), and there is a problem that the lower surface cannot be properly cut. It has occurred.
[0008]
The present invention has been developed to solve the above-described problems. That is, an object of the present invention is to provide a rolled material joining apparatus provided with a tip pinch roll that gives an upward bending habit to the rear end portion of the preceding rolled material.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a cart that travels in the rolling direction, a rear end pinch roll that can be moved up and down by horizontally sandwiching a rear end portion of the preceding rolling material attached on the cart, and the cart. A front end pinch roll that horizontally holds the front end portion of the rolled material attached on the top, a processing device that cuts the rear end lower surface of the preceding rolled material and the upper end surface of the subsequent rolled material, and the preceding rolled material And a pressing device for compressing the upper surface of the preceding rolled material and the lower surface of the succeeding rolled material to substantially the same thickness as the rolled material, and the tip pinch roll is an upper roll and a lower roll. And a moving means for moving the lower roll in the flow direction of the rolled material is provided, and when the rear end of the preceding rolled material is set in the pressure welding apparatus, the lower roll is moved in the flow direction of the rolled material, Return the lower roll when setting the To be substantially perpendicular to an upper roll Te.
[0010]
With the above configuration, the carriage travels in the rolling direction while sandwiching the preceding rolled material and the succeeding rolled material by the trailing end pinch roll and the leading end pinch roll, so that the rolled material is continuously supplied to the finishing mill. Further, the joint surface is cut by the processing device and compressed by the pressure welding device. This allows continuous cutting and pressure welding, so that high-speed pressure welding is possible in a short time.
[0011]
In order to perform cutting with the processing apparatus, the positions of the rear end of the preceding rolled material and the front end of the subsequent rolled material are set. This will be described with reference to FIG. The same reference numerals as those in FIG. 5 are used. When cutting, the upper die device 26 of the pressure welding device is raised with respect to the lower die device 27 so that the cutter of the processing device can be inserted. In accordance with this, the rear end pinch roll 14 is raised so that the rear end of the preceding rolled material 1 comes to the lower surface of the upper mold apparatus 26. The height at which the rolling material of the front pinch roll 16 passes is the same height as the upper surface of the lower die device 27, but when the rear end of the preceding rolling material 1 passes, the lower roll is moved in the flow direction of the rolling material. To do. Thereby, as shown to (A), the preceding rolling material 1 passes toward the rear-end pinch roll 14 in a high position, being attached with a bending habit such that the rear end side is lifted as indicated by a broken line at the front-end pinch roll 16. Therefore, since it becomes a smooth curve between the pinch rolls 14 and 16 and there is no bending habit as shown in FIG. 5, the rear end returns to the horizontal state by the elastic force after passing through the pinch roll 16, and shown in FIG. Thus, when the rear end pinch roll 14 horizontally holds the rear end portion of the preceding rolled material 1, the rear end is in a state of being substantially in contact with the lower surface of the upper mold apparatus 26, and the drooping phenomenon as shown in FIG. Can be prevented. When the preceding rolled material 1 passes, the lower roll of the rear end pinch roll 16 is returned, whereby the subsequent rolled material 2 becomes horizontal and is guided to the upper surface of the lower mold apparatus 27. As shown in FIG. The tip portion of the metal plate contacts the upper surface of the lower mold apparatus 27. As a result, the lower surface of the preceding rolled material 1 and the upper surface of the subsequent rolled material 2 become substantially horizontal, and appropriate cutting can be performed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same numerals indicate the same meaning.
FIG. 1 is a side view showing the configuration of the embodiment. In FIG. 1, the rolling material joining apparatus 10 includes a carriage 12 that travels in the rolling direction indicated by an arrow, and a rear end that can be moved up and down by horizontally holding a rear end portion of the rolling material 1 that is attached on the carriage 12 and precedes. A pinch roll 14, a tip pinch roll 16 that horizontally attaches the tip of the subsequent rolled material 2 mounted on the carriage 12, a lower surface of the rear end of the preceding rolled material 1, and an upper surface of the tip of the subsequent rolled material 2 Is substantially the same as the rolled materials 1 and 2 by superimposing the processed surfaces of the processing device 18, the reducing flame burners 20 a and 20 b for holding the processed surface in a reduced state, and the processed surfaces of the preceding rolled material 1 and the subsequent rolled material 2. And a pressure welding device 22 for compressing and joining to a thickness.
[0013]
The elevating cylinder 14a attached to the side surface of the frame 24 of the pressure welding device 22 has a processing height H for bringing the lower surface of the rear end portion of the preceding rolled material 1 into contact with the upper surface of a cutter 19a described later and the rear end portion of the preceding rolled material 1. The rear end pinch roll 14 is moved up and down between the front end portion of the subsequent rolled material 2 and the pressure contact height L held at substantially the same height. The rear end pinch roll 14 is composed of two upper and lower rolls, and the upper roll is moved up and down by a driving device (not shown). When the upper roll is lowered, the rear end portion of the preceding rolled material 1 is horizontally held, and when the upper roll is raised, the lower roll is a guide roll for the rolled material. With this configuration, the preceding rolling material 1 is held at the processing height H by the elevating cylinder 14a while the rear end portion of the preceding rolling material 1 is horizontally supported by the rear end pinch roll 14, and the preceding rolling material 1 is obtained by the cutter 19a. The lower surface of the rear end portion and the upper surface of the front end portion of the succeeding rolled material 2 can be cut, and then the rear end pinch roll 14 is lowered while the rear end portion of the preceding rolled material 1 is held horizontally. The processed surfaces of the rolled material 1 and the subsequent rolled material 2 can be overlapped and compressed and joined by the pressure welding device 22.
[0014]
The tip pinch roll 16 includes an upper roll 16a and a lower roll 16b, and is provided with a cylinder 16c that moves the upper roll 16a in the vertical direction and a cylinder 16d that moves the lower roll 16b in the flow direction of the rolling material. When the upper roll 16a is lowered and the leading end of the succeeding rolled material 2 is horizontally held, when it is raised, the lower roll 16b becomes a guide roll for the rolled material. Further, the upper roll 16a is lowered and the lower roll 16b is moved in the flow direction of the rolled material, passing through the preceding rolled material 1 and having a bending habit such that the rear end side thereof is directed upward.
[0015]
A guide roller 15 is provided stepwise in front of the rear end pinch roll 14 so that the rolled material 1 has a gentle curve. The displacement roller 15a moves up and down as the rear end pinch roll 14 moves up and down, and when the rear end pinch roll 14 reaches the pressure contact height L, the rolled material 1 is displaced so as to be horizontal. Guide rollers 17 are also provided before and after the front end pinch roll 16 so that the rolled material 2 has a gentle curve.
[0016]
The processing device 18 includes a cylindrical cutter 19a that rotates about the axis in the width direction of the rolled materials 1 and 2, an arm 19b that swings the cutter 19a in an oblique direction, and the cutter 19a that is inclined in the rolling direction. It comprises a reciprocating device (hydraulic cylinder) 19c that moves forward and backward. The cutter 19a is attached to the tip of the arm 19b and is rotated and cut by a rotation drive device (not shown). The cutter 19a uses the arm 19b and the reciprocating device 19c to cut the lower surface of the rear end portion of the preceding rolled material 1 and the upper surface of the front end portion of the subsequent rolled material 2 at the processing position indicated by the solid line in FIG. 19b is retracted to the position indicated by the alternate long and short dash line.
[0017]
The reducing flame burners 20a and 20b burn a combustible gas such as coke oven gas, LPG, and LNG with a smaller amount of oxygen than the amount that completely burns to generate a reducing flame and spray it on the work surface to prevent oxidation. The reducing flame burner 20a is attached to the rear end pinch roll 14 and the reducing flame burner 20b is attached to the carriage 12 via a support material (not shown). The lower surface of the rear end portion of the preceding rolled material 1 and the upper surface of the upper end portion of the subsequent rolled material 2 are attached. A reducing gas is blown toward the machined surface to maintain the reduced state and prevent oxidation of the cut surface.
[0018]
In the pressure welding device 22, a plurality (three in this case) of hydraulic cylinders 23 are used. The hydraulic cylinder 23 is supported by a frame 24, and the frame 24 is supported by a support column 25. A lower portion of the support column 25 is fixed to the carriage 12. The rod end of the hydraulic cylinder 23 is fixed to the upper mold apparatus 26, and a lower mold apparatus 27 that supports a compressive load from the hydraulic cylinder 23 is fixed to the carriage 12 below the upper mold apparatus 26. The upper die device 26 is pressed down by the hydraulic cylinder 23 to press the upper surface of the preceding rolled material 1 and the lower surface of the subsequent rolled material 2, and press-contact with the rolled materials 1 and 2 to substantially the same thickness.
[0019]
The carriage 12 has a plurality of wheels 13 and travels on the rail 3 extending in the rolling direction. B is the rolling height of the rolling device, and the rolled material 1 or 2 is supported on the plurality of rollers 4 and moves 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 28 and 30 that guide the rolled material 1 from the rolling height B of the rolling device to the front pinch roll 16 and guide from the rear end pinch roll 14 to the rolling height B are provided. Are oscillated by hydraulic cylinders 29 and 31. By setting the inclined guides 28 and 30 to the positions indicated by the alternate long and short dash line, the existing rolling apparatus can be operated as it is.
[0020]
FIG. 2 is a view for explaining the operation of the tip pinch roll 16 of the present invention. In order to set the rear end of the preceding rolled material 1 and the front end of the subsequent rolled material 2 to the upper die device 26 and the lower die device 27 as shown in FIG. 1, the rear end pinch roll 14 is set as shown in FIG. Set to the position, the upper roll 16a of the tip pinch roll 16 is lowered, and the lower roll 16b is moved in the flow direction of the rolling material. By passing the preceding rolled material 1 in this state as shown in (A), it is possible to add a bending habit such that the rear end side rises as shown by a broken line. (B) shows a state where the rear end of the preceding rolled material 1 is horizontally held by the rear end pinch roll 14 when the rear end of the preceding rolled material 1 comes to the lower surface of the upper die device 26, and the rear end of the preceding rolled material 1 is bent upward. Therefore, it is in contact with the lower surface of the upper mold apparatus 26. (C) shows a state in which the leading end of the subsequent rolled material 2 is installed on the upper surface of the lower mold apparatus 27. The lower roll 16b of the front end pinch roll 16 is returned from the state (A) to a state in which the upper roll 16a and the lower roll 16b are vertical, and the front end portion of the subsequent rolled material 2 is guided horizontally to the upper surface of the lower mold apparatus 27. . Thereby, as shown in FIG. 4, it becomes possible to appropriately cut the rear end lower surface of the preceding rolled material 1 and the upper end surface of the subsequent rolled material 2 with the cutter 19a.
[0021]
【The invention's effect】
As is clear from the above description, the present invention allows the lower roll of the front pinch roll to move in the flow direction of the rolled material, thereby giving an upward bending habit to the rear end of the preceding rolled material, The front end of the rolled material can be guided horizontally, the rear end of the preceding rolled material can be brought into contact with the lower surface of the upper mold apparatus, and the front end of the subsequent rolled material can be brought into contact with the upper surface of the lower mold apparatus. Thereby, the press-contact surface of a rolling material can be cut appropriately.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of an embodiment of the present invention.
FIGS. 2A and 2B are diagrams for explaining the operation of the embodiment of the present invention, in which FIG. 2A shows a state in which the rear end portion of the preceding rolled material 1 passes through the tip pinch roll 16, and FIG. (C) shows a state in which the leading end portion of the succeeding rolling material 2 is set on the upper surface of the lower die device 27.
FIG. 3 is a diagram showing a configuration of a conventional pressure welding apparatus.
FIG. 4 shows a state in which the rear end portion of the preceding rolled material 1 and the front end portion of the subsequent rolled material 2 are set in the upper die device 26 and the lower die device 27 so that the joint surfaces can be cut by the cutter 19a. FIG.
FIG. 5 shows a state in which the rear end portion of the conventional preceding rolled material 1 is set at the lower part of the upper die apparatus 26, and FIG. 5 (A) shows the rear end portion of the preceding rolled material 1 passing through the tip pinch roll 16. (B) is a figure which shows the state which set the rear-end part of the preceding rolling material 1 to the lower part of the upper mold apparatus 26. FIG.
[Explanation of symbols]
1, 2 Rolled material 3 Rail 4 Roller 12 Cart 13 Wheel 14 Rear end pinch roll 14a Elevating cylinder 15, 17 Guide roller 15a Displacement roller 16 Front end pinch roll 18 Processing device 19a Cutter 19b Arm 19c Reciprocating device 20a, 20b Reduction flame burner 22 Pressure welding device 23 Hydraulic cylinder 24 Frame 25 Strut 26 Upper mold device 27 Lower mold device 28, 30 Inclination guides 29, 31 Hydraulic cylinder H Processing height L Pressure height B Rolling height

Claims (1)

A cart that travels in the rolling direction, a rear end pinch roll that can be moved up and down by horizontally holding a rear end portion of the preceding rolled material that is mounted on the cart, and a leading end of the subsequent rolled material that is mounted on the cart The tip pinch roll that holds the part horizontally, the processing device that cuts the rear end lower surface of the preceding rolled material and the upper end surface of the subsequent rolled material, and the processing surfaces of the preceding rolled material and the subsequent rolled material are overlapped. A pressure welding device that compresses the upper surface of the preceding rolled material and the lower surface of the subsequent rolled material to substantially the same thickness as the rolled material,
The tip pinch roll is composed of an upper roll and a lower roll, provided with a moving means for moving the lower roll in the flow direction of the rolled material, and when setting the rear end of the preceding rolled material in the pressure welding device, the lower roll is made of the rolled material. A rolling material joining apparatus, which moves in the flow direction and sets a subsequent rolled material in a pressure welding apparatus so that the lower roll is returned to be substantially perpendicular to the upper roll.

Images