JP3674932B2 - Rolled material joining apparatus having a die changer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an 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, and in particular, a die used for pressure welding can be exchanged. The present invention relates to a rolled material joining apparatus having a mold exchanging apparatus.
[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, there has been proposed a joining apparatus that joins 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 and supplies them to the finishing mill.
[0003]
[Problems to be solved by the invention]
Japanese Patent Application Laid-Open No. 63-93408 proposes an apparatus for forming a loop in a rolled material and press-contacting a rear end portion and a front end portion. In the case of pressure welding, a die is provided on each of the upper side and the lower side of the pressure contact portion, and the die is compressed by a press. Due to this compression, the mold is subjected to a severe load and is in contact with a high-temperature rolling material, so that it is easily damaged and must be frequently replaced. Furthermore, it is necessary to efficiently replace the mold in a short time, and there has been a demand for an apparatus that can automatically and easily replace the mold.
[0004]
The present invention has been developed to solve the above-described problems. That is, the present invention can join the trailing end of the preceding rolled material and the leading end of the following rolled material during the running of the rolled material, and provide sufficient bonding strength over the entire width of the rolled material in a short time. It is another object of the present invention to provide a rolled material joining apparatus including a device that can be secured and that can easily replace a die used when pressure-welding a rolled material.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention of claim 1 includes a cart that travels in the rolling direction, and a rear end clamping device that can be moved up and down by horizontally holding the rear end portion of the rolling material that is mounted on the cart and precedes it. A tip clamping device that horizontally holds the tip of the subsequent rolled material attached on the carriage, a processing device that cuts the rear end lower surface of the preceding rolled material and the upper end of the subsequent rolled material, and The reduction holding device that holds the processed surface in a reduced state, the processed surfaces of the preceding rolled material and the following rolled material are overlapped, and the upper die unit that contacts the upper surface of the preceding rolled material and the lower surface of the following rolled material A pressure welding device that compresses to approximately the same thickness as the rolled material by a die unit, and a rolled material that travels the rolling height, is provided at the front and rear of the carriage, and is guided to the leading pinch roller and from the trailing pinch roller. Bottom guiding to lower rolling height Position and inclined guide and swingable between the raised position of the rolled material to travel to pass through the lower side of the carriage, disposed at a predetermined position within the travel range of the carriage the upper mold unit and the lower tool unit And a mold exchanging device for exchanging the upper and lower clamp units for detachably holding the upper die unit and the lower die unit, respectively . An exchange carriage that moves in the width direction of the rolling material, an arm that is provided on the exchange carriage and that extends in the movement direction, the height of which can be inserted at an interval at which the upper and lower mold units are opened, and An upper mold by an upper clamp device when the inclined guide is in the ascending position and the rolled material is running at a rolling height. Hold the unit The upper mold unit and the lower mold unit are carried out by placing them on the upper surface of the tip of the arm and releasing the grip of the lower mold unit by the lower clamping device and lifting it up by the magnetic force of the magnet. Take out .
[0006]
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 clamping device and the leading end clamping device, 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. At this time, since the processed surface is brought into a reduced state by the reduction holding device and is pressed, generation of an oxide film (scale) is prevented and sufficient bonding strength is obtained. Further, the carriage is stopped at the position of the replacement carriage, the upper and lower mold units are opened, and then the replacement carriage is brought close to the carriage and the end of the arm is inserted between the upper and lower mold units. Next, the clamping device that holds the lower mold unit is released, and the mold unit is attracted by the magnet. In this state, the lower die unit can be taken out by pulling the replacement cart away from the cart. In addition, the lower mold unit can be mounted by inserting the lower mold unit in the state where the lower mold unit is attracted to the magnet on the lower surface of the arm and inserting the magnet into the mounting position of the carriage, demagnetizing the magnet, and holding the magnet with the clamping device.
[0007]
The upper mold unit is carried on and taken out from the top surface of the tip of the arm. After the carriage is stopped at the position of the replacement carriage and the upper and lower mold units are opened, the replacement carriage is brought close to the carriage and the end of the arm is inserted between the upper and lower mold units. Next, when the clamping device that holds the upper mold unit is released, the upper mold unit is placed on the upper surface of the arm. In this state, the upper mold unit can be taken out by pulling the replacement carriage away from the carriage. it can. Further, the upper mold unit can be mounted by inserting the upper mold unit on the upper surface of the arm and inserting it into the mounting position of the mold unit of the carriage and holding it with the clamping device.
[0008]
According to a third aspect of the present invention, the upper mold unit includes an upper mold and an upper mold holder that holds the upper mold, and the lower mold unit includes a lower mold and a lower mold holder that holds the lower mold.
[0009]
By configuring the mold unit from a mold and a mold holder that holds the mold, it is possible to replace only the mold part that is heavily consumed and use the mold holder continuously.
[0010]
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. 2 is a cross-sectional view taken along the line XX of FIG. In FIG. 1, the rolling material joining apparatus 10 includes a carriage 12 that travels in the rolling direction, and a rear end pinch roller 14 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. And a tip pinch roller 16 mounted horizontally on the carriage 12 to horizontally hold the tip of the following rolled material 2, the lower surface of the rear end of the preceding rolled material 1, and the upper surface of the tip of the subsequent rolled material 2. The processing device 18 to perform, the reduction holding device 20 to hold the processed surface in a reduced state, and the processed surfaces of the preceding rolled material 1 and the subsequent rolled material 2 are overlapped and compressed to approximately the same thickness as the rolled materials 1 and 2. A pressure welding device 22 to be joined and a mold exchanging device 32 shown in FIG. 2 are provided.
[0011]
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 roller 14 is moved up and down between the front end portion of the subsequent rolling material 2 and the pressure contact height L held at substantially the same height. The rear end pinch roller 14 is composed of two upper and lower rollers, and the upper roller is moved up and down by a driving device (not shown). When the upper roller is lowered, the rear end portion of the preceding rolled material 1 is horizontally held, and when the upper roller is raised, the lower roller is a guide roller 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 roller 14, and the preceding rolling material 1 is retained by the cutter 19a. The lower end of the rear end portion and the upper end portion of the succeeding rolling material 2 can be cut, and the processing surfaces of the preceding rolling material 1 and the following rolling material 2 are overlapped while being held at the pressure height L, It can be compressed and joined by the pressure welding device 22.
[0012]
The front end pinch roller 16 has the same configuration as the rear end pinch roller 14, and the upper roller is lowered by a device (not shown) to horizontally hold the front end portion of the succeeding rolling material 2. It becomes a guide roller. A guide roller 15 is provided in a stepped manner in front of the rear end pinch roller 14 so that the rolled material 1 has a gentle curve. The displacement roller 15a moves up and down as the rear end pinch roller 14 moves up and down, and when the rear end pinch roller 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 roller 16 so that the rolled material 2 has a gentle curve.
[0013]
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, a swing device 19b that swings the cutter 19a in an oblique direction, and a cutter 19a that tilts in the rolling direction. And a reciprocating device (hydraulic cylinder) 19c that moves back and forth. The cutter 19a is attached to the tip of the arm 19d of the swinging device 19b, and is rotated by a rotary drive device (not shown). The cutter 19a uses the swinging device 19b and the reciprocating device 19c to cut and process 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. The rear arm 19d is retracted to the position indicated by the alternate long and short dash line.
[0014]
The reducing and holding device 20 is a reducing flame burner 20a, 20b that generates a reducing flame by blowing a combustible gas such as coke oven gas, LPG, LNG or the like with a quantity less than the amount of complete combustion, and sprays it on the work surface to prevent oxidation. It becomes more. The reducing flame burner 20a is attached to the rear end pinch roller 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 front 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.
[0015]
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.
[0016]
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 are provided that guide the rolled material 1 from the rolling height B of the rolling device to the front end pinch roller 16 and from the rear end pinch roller 14 to the rolling height B and that can swing up and down. 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.
[0017]
FIG. 2 shows a mold exchanging apparatus, and FIG. 3 is a YY cross-sectional view of FIG. FIG. 4 is an enlarged view of the mold apparatus. A mold exchanging device 32 is provided at an appropriate position for performing maintenance work within the traveling range of the carriage 12, and a rail 34 of the exchange carriage 33 is laid in a direction perpendicular to the rail 3 of the carriage 12. The replacement carriage 33 travels on the rail 34 by a travel device (not shown) and stops accurately at a predetermined position. The replacement carriage 33 is provided with an arm 35 horizontally in the direction of the rail 34, and its lower surface level is adjusted to be the upper surface of the lower mold device 27. The length of the arm 35 is such that the tip is sufficiently inserted into the upper and lower mold apparatuses 26 and 27 at the position where the replacement carriage 33 is stopped by the rail stopper 34a. A magnet 36 that attracts a lower mold 48a and a lower mold holder 48b constituting a lower mold unit 48, which will be described later, is embedded in the lower surface of the distal end portion of the arm 35. The magnet 36 can be excited and demagnetized by an electric current.
[0018]
3 and 4, the upper mold apparatus 26 includes an upper mold support base 41 fixed to the hydraulic cylinder 23, an upper mold 42a constituting the upper mold unit 42, and an upper mold for pressing the upper mold 42a. A mold holder 42b, a hydraulic clamping device 44 for fixing the upper mold holder 42b to the upper mold support base 41, a mold lateral movement pressing block 45 for suppressing lateral movement of the upper mold 42a, and a mold lateral movement pressing block 45 and a pressing plate 46 for pressing the upper mold 42a. The lower mold device 26 includes a lower mold support base 47 fixed to the carriage 12, a lower mold 48a, a lower mold holder 48b for holding the lower mold 48a, and the lower mold holder 48b as a lower mold. It comprises a hydraulic clamping device 44 that is fixed to the support 47, a mold lateral movement pressing block 45 that suppresses the lateral movement of the lower mold 49, and a pressing plate 46 that presses the mold lateral movement pressing block 45 and the lower mold 48a. ing.
[0019]
Magnets 36 are provided on the lower surface of the distal end portion of the arm 35 in two steps according to the levels of the upper surfaces of the lower mold holder 48b, the lower mold 48a, and the pressing plate 46. The upper surface of the tip of the arm 35 does not have the magnet 36, but the shape is similar to the lower surface in accordance with the levels of the lower surfaces of the upper mold holder 42b, the upper mold 42a, and the pressing plate 46.
[0020]
The hydraulic clamp device 44 shown in FIG. 4 shows an example thereof, which is composed of an L-shaped clamp arm 44a and a hydraulic cylinder 44b. The hydraulic clamp device 44 rotates around a corner of the clamp arm 44a and is moved up and down by a claw 44c. 48b is fixed or released.
[0021]
Next, the mold replacement work will be described.
The die replacement is performed when the joining work by the rolling material joining apparatus 10 is not performed. In this case, by moving the inclined guides 28 and 30 close to the horizontal in FIG. 1 and running the rolled material at the rolling height B, the mold exchanging operation can be performed even during the normal rolling operation. First, the carriage 12 is stopped at the die exchange position of the rail 34 of the exchange carriage 33. Next, the hydraulic cylinder 23 is operated to open the upper die device 26 slightly larger than the interval at which the tip of the arm 35 of the replacement carriage 33 can be inserted, and the tip of the arm 35 is moved by moving the replacement carriage 33. 26 and the lower mold apparatus 27 are inserted. Next, the lower hydraulic clamping device 44 is opened, and the magnet 36 is excited to attract the lower mold 48 a and the lower mold holder 48 b to the arm 35. Further, the hydraulic cylinder 23 is lowered and stopped when it comes into contact with the upper mold 42 a, the upper hydraulic clamp device 44 is opened, and the upper mold 42 a and the upper mold holder 42 b are placed on the arm 35. By pulling out the replacement carriage 33 in this state, the upper and lower molds 42a and 48a and the upper and lower mold holders 42b and 48b can be taken out.
[0022]
In this state, new upper and lower mold units 42 and 48 are attached. A lower mold holder 48b obtained by exchanging the lower mold 48a with a device (not shown) is attracted to the magnet 36 on the lower surface of the arm 35. On the upper surface of the arm 35, an upper mold holder 42b obtained by replacing the upper mold 42a is placed. Next, the replacement carriage 33 is moved, the tip of the arm 35 is inserted between the upper mold support base 41 and the lower mold support base 47, the magnet 36 is turned off, and the lower mold support base 47 is lowered. The mold holder 48 b is placed and clamped by the lower hydraulic clamp device 44. Next, the hydraulic cylinder 23 is lowered, the hydraulic cylinder 23 is stopped when the upper surface of the upper mold holder 42 b hits the lower surface of the upper mold support base 41, and the upper mold holder 42 b is clamped by the upper hydraulic clamp 44. . Next, after raising the hydraulic cylinder 23 to such an extent that the arm 35 can be pulled out, the replacement carriage 33 is moved and the arm 35 is pulled out.
[0023]
The hydraulic clamping device 44 can be operated remotely and can be automated. In addition, since the operation including the movement of the replacement carriage 33 and the adsorption and desorption of the magnet 36 can be automated, the mold exchanging work can be facilitated. This makes it possible to quickly replace the mold. In the above description, the hydraulic clamping device 44 is used, but a mechanical clamping device may be used.
[0024]
FIG. 5 is a diagram showing another example of the mold unit. The mold unit shown in FIGS. 3 and 4 is configured by dividing a mold and a mold holder that holds the mold, but the mold unit shown in FIG. 3 is an integrated unit. Such integration makes it easy to manufacture and handle the mold unit.
[0025]
【The invention's effect】
As is clear from the above description, the equipment of the present invention can perform high-speed pressure welding by continuously processing and compressing the pressure contact surface, and can provide sufficient bonding strength by pressing the processed surface in a reduced state, and A stable rolled material can be obtained by compressing the overlapping surface to approximately the same thickness as the rolled material to obtain a substantially uniform thickness. Furthermore, since the upper and lower mold exchanging devices for pressure welding are provided off-line, maintenance and replacement of these molds can be performed reliably and promptly. In addition, the rolling operation can be performed even during the die replacement operation.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of an embodiment of the present invention.
2 is a cross-sectional view taken along the line XX of FIG.
3 is a cross-sectional view taken along the line YY in FIG. 2 and shows the configuration of the upper and lower mold apparatus.
4 is an enlarged view of the upper and lower mold apparatus of FIG. 3. FIG.
FIG. 5 is a diagram of a mold unit in which a mold and a mold holder are integrated.
[Explanation of symbols]
1, 2 Rolled material 3 Rail 4 Roller 12 Cart 13 Wheel 14 Rear end pinch roller 14a Lifting cylinder 15, 17 Guide roller 15a Displacement roller 16 Front end pinch roller 18 Processing device 19a Cutter 19b Oscillating device 19c Reciprocating device 19d Arm 20 Reduction Holding 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 32 Mold change device 33 Replacement carriage 34 Rail 35 Arm 36 Magnet 41 Upper mold support base 42 Upper mold unit 42a Upper mold 42b Upper mold holder 44 Hydraulic clamp device 45 Mold lateral movement holding block 46 Holding plate 47 Lower mold support base 48 Lower mold unit 48a Below Die 48b Lower mold holder H Processing height L Pressure height B Pressure Height

Claims (2)

A cart that travels in the rolling direction, a rear end clamping device 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 A front end clamping device that horizontally holds the portion, 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 a reduction holding device that holds the processed surface in a reduced state, The processed surfaces of the preceding rolled material and the succeeding rolled material are overlapped, and compressed to almost the same thickness as the rolled material by the upper die unit in contact with the upper surface of the preceding rolled material and the lower die unit in contact with the lower surface of the succeeding rolled material. A pressure welding device, and a lowering position and a rolling material, which are provided before and after the carriage, raise the rolled material that travels the rolling height, guide it to the leading pinch roller, and guide it from the trailing pinch roller to a lower rolling height. Pass under the dolly and run Includes inclined guide and swingable between a raised position for, the mold changing apparatus is disposed in a predetermined position to replace said lower die unit and the upper mold unit in the running range of the carriage,
The pressure welding device is provided with an upper and lower clamping device for detachably holding the upper die unit and the lower die unit,
The mold exchanging apparatus includes an exchanging carriage that moves in the width direction of the rolled material, and an arm that is provided in the exchanging carriage and extends in the moving direction so that its height is inserted at an interval at which the upper and lower mold units are opened. An arm that can be mounted on the lower surface of the front end of the arm and capable of attaching and detaching the lower mold unit, and the upper side when the inclined material is in the ascending position and the rolled material is running the rolling height. The upper mold unit is released by the clamping device and placed on the top surface of the tip of the arm, and the lower mold unit is released by the lower clamping device, and is lifted by the magnetic force of the magnet to be absorbed. Unload and take out the mold unit and lower mold unit,
A rolled material joining apparatus having a mold exchanging apparatus.   2. The upper mold unit includes an upper mold and an upper mold holder that holds the upper mold, and the lower mold unit includes a lower mold and a lower mold holder that holds the lower mold. A rolled material joining apparatus having the described die changer.

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