JP3694886B2 - Rolled material joining apparatus having clamp with plate warp correction mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clamp with a plate warpage correction mechanism provided in a rolling material joining apparatus for joining a trailing end of a preceding rolling material and a leading end of a succeeding rolling material while traveling with the rolling 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]
Such a rolled material joining apparatus includes a method in which the trailing end of the preceding rolled material and the leading end of the succeeding rolled material are overlapped and pressed on a carriage traveling at the same speed as the rolled material, and the trailing end of the preceding rolled material There are two methods, ie, a method in which the tip of the subsequent rolled material is brought into contact with and pressed, and in either case, the rear end of the preceding rolled material and the tip of the subsequent rolled material are sandwiched by clamps to match or press the joining position. I do.
[0004]
[Problems to be solved by the invention]
The rolled material enters the rolled material joining apparatus at a high temperature, for example, about 1200 ° C., but is lowered by contact with a clamp or a pinch roll. When the temperature is lowered, the rolling load in finish rolling in the subsequent process increases. For this reason, it is not desirable to hold the entire plate width with the clamp. However, if it is partially gripped, the bending and warping of the rolled material cannot be corrected, and appropriate joining cannot be performed.
[0005]
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 plate warpage correction mechanism by reducing the contact area between the clamp and the rolled material.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 includes a carriage that travels in the rolling direction, a rear end clamp that horizontally attaches a rear end portion of the rolling material that is mounted on the carriage and precedes the carriage, and the carriage. Tip clamp for horizontally gripping the tip of the rolled material that is attached and following, processing device for cutting the trailing edge of the preceding rolled material and the tip of the following rolled material, and the preceding rolled material and the following rolled material A rolling material joining apparatus comprising a pressure welding device that compresses and joins the preceding rolled material and the subsequent rolled material to approximately the same thickness as the rolled material, the rear end clamp and the front end clamp. Is provided with a plurality of gripping bodies that grip the rolled material in the plate width direction, and correction bodies that are provided alternately with the gripping body and suppress the plate warpage of the rolling material, and the surface of the correction body facing the rolling material is It is arranged to be recessed a predetermined distance from the rolling material gripping surface of the gripping body.
[0007]
A plurality of gripping bodies for gripping the rolled material are provided in the plate width direction of the rolled material, and are arranged alternately with the correction bodies. Thereby, a contact area with a rolling material can be decreased and the temperature fall of a rolling material can be decreased. The surface of the correction body facing the rolled material is arranged to be recessed by a predetermined distance from the holding surface of the holding material of the holding body, and the plate warpage exceeding this predetermined distance is corrected. This predetermined distance is determined by the plate warpage allowed for joining.
[0008]
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 of a rolled material joining apparatus 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 front end pinch roll 16 mounted horizontally on the carriage 12 and horizontally holding the front end portion of the rolled material 2, and a rear end capable of moving up and down by horizontally holding the rear end portion of the preceding rolled material 1 A clamp 18, a front end clamp 20 that horizontally grips the front end of the subsequent rolled material 2, and a processing device 22 that cuts the rear end lower surface of the preceding rolled material 1 and the upper end of the subsequent rolled material 2. The pressure reduction burners 24a and 24b that hold the processed surface in a reduced state, and the pressed surfaces for compressing and joining the processed surfaces of the preceding rolled material 1 and the subsequent rolled material 2 to the same thickness as the rolled materials 1 and 2 are overlapped. Device 26.
[0009]
A side guide roller 28 a is provided at the front part of the rear end pinch roll 14, and a side guide roller 28 b is provided at the rear part of the front end pinch roll 16, and the width direction of the preceding rolled material 1 and the subsequent rolled material 2, respectively. Guide the movement.
[0010]
In front of the rear end pinch roll 14, a plurality of guide rollers 38 are provided in an inclined shape, and an exit side inclined table 30 is provided so that the preceding rolled material 1 descends in a gentle curve. A plurality of guide rollers 38 are provided in an inclined rear side, and an entry side inclined table 32 is provided so that the succeeding rolled material 2 rises in a gentle curve. The exit side tilt table 30 and the entrance side tilt table 32 rotate around a hinge 40 provided on the carriage 12. The exit side tilt table 30 is rotated by a table cylinder 34a, and the entry side tilt table 32 is rotated by a table cylinder 34b.
[0011]
An elevating unit 36 is provided by using the support column of the pressure contact device 26 as a guide, and is moved up and down by an elevating unit cylinder 37. A rear end pinch roll 14, a rear end clamp 18, a side guide roller 28a, and a table cylinder 34a are mounted on the elevating unit 36. The raising / lowering unit 36 includes a processing height H for bringing the lower surface of the rear end portion of the preceding rolled material 1 held by the rear end pinch roll 14 and the rear end clamp 18 into contact with the upper surface of a cutter 23 described later, and the rear end of the preceding rolled material 1. The portion is moved up and down between the pressure contact height L that holds the portion approximately the same height as the tip of the subsequent rolled material 2. The rear end pinch roll 14 is composed of upper and lower two-stage rolls, and the upper stage rolls up and down by a driving device. When the upper roll is lowered, the rear end portion of the preceding rolled material 1 is horizontally held. When the upper roll is raised, the lower roll is a guide roll for the rolled material. The rear end clamp 18 grips and positions the preceding rolled material 1 when the rear end surface of the preceding rolled material 1 comes to a position necessary for pressure contact in the rolling direction. With this configuration, the preceding rolled material 1 is held at the processing height H by the lifting unit cylinder 37 while the rear end portion of the preceding rolled material 1 is horizontally supported by the rear end clamp 18, and the preceding rolled material 1 is held by the cutter 23. The lower surface of the rear end portion and the upper surface of the front end portion of the succeeding rolling material 2 can be cut, and then the lifting unit 36 is lowered while the rear end portion of the preceding rolling material 1 is held horizontally to move the preceding rolling material. 1 and the processed surface of the subsequent rolled material 2 can be overlapped and compressed by the pressure welding device 26 to be joined.
[0012]
The tip pinch roll 16 is composed of an upper roll and a lower roll. The upper roll descends to horizontally hold the leading end portion of the succeeding rolled material 2, and when raised, the lower roll becomes a guide roll for the rolled material. The front end clamp 20 grips and positions the subsequent rolled material 2 when the front end surface of the subsequent rolled material 2 comes to a position necessary for pressure contact in the rolling direction. By positioning the rear end clamp 18 and the front end clamp 20, an overlap margin between the rear end of the preceding rolled material 1 and the front end of the subsequent rolled material 2 is secured.
[0013]
The processing device 22 is provided with a rotary cutter 23 having an oblique axis, moves in an oblique direction and enters between the rolled materials 1 and 2 set with an interval in the vertical direction. The lower surface of the rear end and the upper surface of the front end of the subsequent rolled material 2 are cut. The cutter 23 moves in the plate width direction of the rolled materials 1 and 2 while rotating and cutting to cut the entire plate width.
[0014]
The reducing flame burners 24a and 24b 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 24a is attached to the elevating unit 36 and moves up and down, and the reducing flame burner 24b is attached to the carriage 12 via a support member (not shown), and the lower surface of the rear end portion of the preceding rolled material 1 and the leading end of the following rolled material 2. A reducing gas is blown toward the machining surface on the upper surface of the part to maintain the reduced state and prevent oxidation of the cutting surface.
[0015]
A plurality (three in this case) of hydraulic cylinders 26a are arranged in the pressure contact device 26 in the plate width direction. The hydraulic cylinder 26a is supported by a frame 26b, and the frame 26b is supported by a column 26c. The lower side of the column 26c is fixed to the carriage 12. The rod end of the hydraulic cylinder 26a is fixed to the upper mold apparatus 26d, and a lower mold apparatus 26e for supporting a compressive load from the hydraulic cylinder 26a is fixed to the carriage 12 below the upper mold apparatus 26d. The upper die device 26d is squeezed down by the hydraulic cylinder 26a to press the upper surface of the preceding rolled material 1 and the lower surface of the succeeding rolled material 2 so that they are pressed to almost the same thickness as the rolled materials 1 and 2.
[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. The entry side inclined table 32 guides the rolled material 1 from the rolling height B of the rolling device to the front end pinch roll 16, and the outlet side inclined table 30 guides the rolled material 1 from the rear end pinch roll 14 to the rolling height B. The existing rolling apparatus can be operated as it is by rotating the outlet side inclined table 30 and the inlet side inclined table 32 to the positions indicated by broken lines.
[0017]
FIG. 2 is a sectional view taken along line XX in FIG. Although this figure shows the front end clamp 20, the rear end clamp 18 has the same structure. The clamps 18 and 20 are composed of a lower receiving base 103, an upper pressing base 104, and a pressing cylinder (not shown) that presses the upper pressing base 104, and the lower receiving base 103 and the upper pressing base 104 hold the rolled materials 1 and 2. The bodies 101 and the correction bodies 102 are alternately arranged in the width direction of the rolled material plate. Although FIG. 2 shows a case where there are two gripping bodies 101, three or more gripping bodies 101 may be used depending on the plate width of the rolled materials 1 and 2 to be joined. The contact surface of the gripping body 101 with the rolled materials 1 and 2 is made into a fine mountain shape to reduce the contact area. The surface of the correction body 102 facing the rolled materials 1 and 2 is recessed by a distance T from the holding surface of the rolled materials 1 and 2 of the grip body 101. Plate warpage greater than this distance T is corrected. The size of T is determined by the allowable joining warpage of the rolled material joining apparatus 10 and is, for example, about 2 to 3 mm, although it depends on the thickness of the rolled materials 1 and 2.
[0018]
【The invention's effect】
As is clear from the above description, the present invention provides a contact area between the rolled material and the clamp by alternately providing a gripping body for gripping the rolled material of the clamp and a correcting body for correcting the plate warpage in the plate width direction. It is possible to reduce the temperature drop of the rolled material and to correct the plate warpage.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of an embodiment of the present invention.
FIG. 2 is a detailed view of a grip portion in the XX cross-sectional view of FIG.
[Explanation of symbols]
1, 2 Rolled material 3 Rail 4 Roller 10 Rolled material joining device 12 Cart 13 Wheel 14 Rear end pinch roll 16 Front end pinch roll 18 Rear end clamp 20 Front end clamp 22 Processing device 23 Cutter 24a, 24b Reduction flame burner 26 Pressure welding device 26a Hydraulic pressure Cylinder 26b Frame 26c Post 26d Upper mold device 26e Lower mold device 28a, 28b Side guide roller 30 Outlet side inclined table 32 Inlet side inclined table 34a, 34b Table cylinder 36 Lift unit 37 Lift unit cylinder 38 Guide roller 40 Hinge 101 Grasping body 102 Straightened body 103 Lower cradle 104 Upper press pedestal H Processing height L Pressure height B Rolling height

Claims (1)

A cart that travels in the rolling direction, a rear end clamp that horizontally grips the rear end portion of the preceding rolling material that is mounted on the cart, and a front end portion of the subsequent rolling material that is mounted on the cart and horizontally. The leading end clamp, the processing device for cutting the trailing end of the preceding rolling material and the leading end of the following rolling material, and the processing surfaces of the preceding rolling material and the following rolling material are overlapped, and the preceding rolling material and the following rolling are overlapped. A rolled material joining apparatus comprising a pressure welding device that compresses and joins a material to approximately the same thickness as the rolled material, wherein the rear end clamp and the front end clamp have a plurality of grips for gripping the rolled material in the plate width direction. And a straightened body that is provided alternately with the gripping body and suppresses the warpage of the rolled material, and the surface of the straightened body that faces the rolled material is recessed with a predetermined distance from the rolled material gripping surface of the gripping body. It has a clamp with a plate warp correction mechanism characterized in that Rolled material bonding device.

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