JPH0952103A - Continuous hot rolling equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove protuberant parts on both sides of the joined part between rolled stocks and also to prevent high-temp. chips from sticking to other equipment. SOLUTION: Rotary edged tools 32 whose width is wider than the max. width of the rolled stock are respectively arranged on upper and lower sides of the rolled stock between a joining device 6 and a finishing mill group 2, and the chips generated by cutting and removing the protuberant parts between the rear end part of a preceding rolled stock 4 and the tip part of the succeeding rolled stock 5 which are joined with a joining device with a pair of the upper and lower rotary cutting tools are housed in upper and lower chip discharging ducts 39, 46 respectively. By jetting water from water jetting means, the chips are cooled, allowed to flow downward and separated, the protuberant parts on both sides in the joined part are simultaneously removed by continuous work matching with the progress of the rolled stock and also high-temp. chips are prevented from sticking to other equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention joins a trailing end portion of a preceding rolled material and a leading end portion of a trailing rolled material between a rough rolling mill group and a finishing rolling mill group to continuously perform hot rolling. The present invention relates to continuous hot rolling equipment.

[0002]

2. Description of the Related Art In recent years, in a strip steel hot rolling facility, a preceding rough rolling material and a following rough rolling material are joined between a rough rolling mill group and a finish rolling mill group, and a finishing rolling mill of the next step is joined. Continuous hot rolling equipment for finishing rolling in groups has been developed. A conventional continuous hot rolling facility will be described with reference to FIG. FIG. 4 shows a side view showing the concept of the conventional continuous hot rolling equipment.

As shown in FIG. 4, a crop shear 3 is provided between the rough rolling mill group 1 and the finish rolling mill 2 on the downstream side of the rough rolling mill group 1. Crop of the trailing end portion of 4 and the leading end portion of the trailing rough rolled material 5 are cut and removed, respectively. A joining device 6 is provided on the downstream side of the crop shear 3, and the joining device 6 joins the trailing end portion of the preceding rough rolled material 4 and the leading end portion of the trailing rough rolled material 5. That is, while the joining device 6 is traveling at the same speed as the advance rough rolled material 4 and the following rough rolled material 5 by the carriage 7, the rear end portion of the preceding rough rolled material 4 is moved by the delivery side clamp 9 in the housing 8. While being clamped, the leading end of the trailing rough rolled material 5 is clamped by the entry side clamp 11 in the inner frame 10. In this state, for example, the joint 12 is heated and heated by the heater 12 by the eddy current of the high frequency coil, and the inner frame 10 is moved to the exit side, whereby the trailing end portion of the preceding rough rolled material 4 and the trailing rough rolled material 4 are moved. The tip end of 5 is pressed and joined in the traveling direction.

On the downstream side of the joining device 6, the swelling removing device 1
3 is provided, and the swelling removing device 13 removes swelling at the joint between the trailing end of the preceding rough rolled material 4 and the leading end of the following rough rolled material 5. That is, as shown in FIG. 5, ridges 15 are generated on the upper and lower surfaces of the joint 14 between the preceding rough rolled material 4 and the following rough rolled material 5 due to the compression of the pressure bonding. Foreign matters 16 such as scales gather on the ridges 15, and when the finish rolling mill group 2 rolls the finished rolled material 17 with the ridges 15 present, the foreign matters 16 spread as shown in FIG. As a result, it remains in the finished rolled material 17 over a long range. When the foreign matter 16 remains on the finished rolled material 17, the foreign matter 16 significantly reduces the strength of the joint portion 14. Therefore, the swelling removing device 13 removes the swelling of the joint portion 14. That is, the swelling removing device 13 is provided with a pair of rotary blades 18 sandwiching the rolled material, and as shown in FIG. 7, the swelling 15 of the joint portion 14 is cut by the cutting blade 19 of the rotary blades 18. Have been removed.

Further, when the riser 15 is removed by the riser removing device 13, high-temperature chips are scattered at a high speed on the rotating side (upstream side in the illustrated example) of the cutting blade 19 and adhere to the surface of the rolled material. There was a risk of Therefore, the chip removing device 20 shown in FIG. 8 is provided on the downstream side of the buildup removing device 13. As shown in FIG. 8, a rotary grindstone 21 is provided so as to be movable in the width direction of the rolled material, and the surface of the rolled material is ground by the rotary grindstone 21 to scatter chips 22 in the lateral direction of the rolled material. On the other hand, a dust collecting hood 23 is provided on the side of the rolled material, and the dust collecting hood 23 has a water supply pipe 24 and a water tank 2.
Water is supplied in a laminar flow through the water wall 5, and the water film 26
Are formed. The hot chips 22 that are scattered toward the dust collecting hood 23 in the lateral direction of the rolled material when being ground by the rotary grindstone 21 are trapped by the water film 26, cooled, dropped, and passed through the discharge groove 27 together with water. It is collected in a pit (not shown).

[0006]

In the conventional continuous hot rolling equipment, the high temperature generated when the rise removing device 13 removes the rise 15 by grinding the surface of the rolled material by the chip removing device 20. Prevents chips from adhering to the rolled material. However, since the chip removing device 20 processes the chips 22 in the width direction of the rolled material, the dust collecting hood 23 having a wide wall surface is required, which is disadvantageous in terms of space. Further, although the swelling removing device 13 has the rotary blades 18 provided above and below the rolled material, since the water film 26 and water droplets to be made to flow down cannot be formed with respect to the lower rotary blade 18, the chip removing device 20. Is currently provided only near the upper rotary blade 18.

[0007]

The structure of the present invention for solving the above-mentioned problems is to provide a trailing end portion of a preceding rolled material and a leading end portion of a trailing rolled material between a rough rolling mill group and a finishing rolling mill group. In a continuous hot rolling equipment for performing continuous rolling by providing a joining device for joining, a rotary blade having a width equal to or larger than the maximum plate width of the rolled material is provided above and below the rolled material between the joining device and the finishing rolling mill group. The upper rotary blade is supported by a chock that is installed and lifted by a pressure reduction cylinder, and the lower rotary blade is supported by a chock that is moved up and down by a height adjustment cylinder to discharge chips from the upper rotary blade. It is characterized in that the upper chip discharge means having the water jetting means is provided on the side, and the lower chip discharge means having the water jetting means is provided on the chip discharge side of the lower rotary blade.

The trailing end portion of the preceding rolled material and the leading end portion of the trailing rolled material are joined by a joining device, and the raised portion of the joined portion is cut and removed by a pair of upper and lower rotary blades. When removing the raised portion, the height adjustment cylinder is used to adjust the height of the lower rotary blade, and the lower and upper rotary blades are rotated at high speed in accordance with the progress of the rolled material. By means of the chocks, and the raised parts on the upper and lower surfaces are simultaneously removed by the rotary blade. Chips blown in the rotation direction by the high-speed rotation of the rotary blade are accommodated in the upper and lower chip discharging means, respectively, and the flowing water is jetted from the running water jetting means to cool the chips and let them flow downward to be discharged.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view showing the concept of a continuous hot rolling facility according to an embodiment of the present invention, and FIG.
II-II line arrow view, FIG. 3 shows the III-III line arrow view in FIG. The same members as those of the continuous hot rolling equipment shown in FIG. 4 are designated by the same reference numerals, and the duplicated description is omitted.

As shown in FIG. 1, a crop shear 3 is provided on the downstream side of the rough rolling mill group 1, and the crop shear 3 allows the trailing end portion of the preceding rough rolled material 4 and the trailing rough rolled material. The crops at the tip of 5 are cut and removed. A joining device 6 is provided on the downstream side of the crop shear 3,
The joining device 6 joins the trailing end portion of the preceding rough rolled material 4 and the leading end portion of the trailing rough rolled material 5. A swelling removing device 31 is provided between the joining device 6 and the finishing rolling mill group 2, and the swelling portion of the joining portion 14 is cut and removed by the swelling removing device 31.

Based on FIGS. 1 to 3, the riser removing device 3
1 will be described. A pair of rotary blades 32 are arranged in the swelling removing device 31 with the rolled material sandwiched therebetween, and a pair of rotary blades 32 are formed with cutting blades 33 each having a width equal to or larger than the maximum plate width of the rolled material on the outer peripheral surface. There is. The roll chock 3 is attached to the housing 34 of the swelling removing device 31 via a reduction cylinder 35.
6 is movably supported, and an upper rotary blade 32 is rotatably supported by the roll chock 36. A roll chock 38 is supported on the housing 34 via a height adjusting cylinder 37 so as to be able to move up and down.
A lower rotary blade 32 is rotatably supported by 8.

An upper chip discharge duct 39 as an upper chip discharge means is provided in the vicinity of the rear side in the rotation direction of the upper rotary knife 32, and the upper chip discharge duct 39 has an opening below the rotary knife 32. The opening 40 having a width wider than that of the rotary blade 32 is formed. A running water jet header 41 as running water jetting means is provided in the upper chip discharge duct 39, and jet nozzles 42 of the running water jet header 41 are provided from above to below. A discharge part 43 is provided in the upper chip discharge duct 39, and the discharge part 43 is on the working side of the rotary blade 32 (left side in FIG. 2).
To the drainage groove 44. Chips 45 generated when cut by the upper rotary blade 32 are collected from the opening 40 into the upper chip discharge duct 39, and discharged into the drain groove 44 by the flowing water jet from the running water jet header 41.

A lower chip discharge duct 46 serving as a lower chip discharge means is provided in the vicinity of the rear side in the rotation direction of the lower rotary blade 32, and the lower chip discharge duct 46 is opened above the rotary blade 32 and is rotated. An opening 47 wider than 32 is formed. A running water jet header 48 as running water jetting means is provided in the lower chip discharge duct 46, and jet nozzles 49 of the running water jet header 48 are provided from the lower side to the upper side. The lower chip discharge duct 46 is provided with a discharge part 40, and the discharge part 50 is provided so as to open above the drain groove 44. The chips 45 generated when cut by the lower rotary blade 32 are collected from the opening 47 into the lower chip discharge duct 46 and discharged into the drainage groove 44 by the running water jet from the running water jet header 48.

In the above continuous hot rolling equipment, the joining device 6 joins the trailing end portion of the preceding rough rolled material 4 and the leading end portion of the trailing rough rolled material 5 and the rotary blade 32 of the swelling removing device 31.
The ridge 15 of the joint portion 14 is cut and removed by the cutting blade 33 (see FIG. 7).

In the buildup removing device 31, the height of the upper surface of the lower rotary blade 32 is adjusted in advance by the height adjusting cylinder 37, and the upper and lower rotary blades 32 are respectively driven and rotated in the direction opposite to the traveling direction of the rolled material. It At the time of cutting, the rotary cylinders 32 and the height adjusting cylinders 37 are pressed to reduce the respective rotary blades 32, so that the foreign matters in which the scales and the like of the joint 14 are gathered are cut off together with the bulges 15 at the same time on the upper and lower surfaces (see FIG. 7).

The high-temperature chips 45 blown to the entrance side at high speed by the high-speed rotation of the rotary blade 32 during cutting are collected in the upper chip discharge duct 39 and the lower chip discharge duct 46, respectively, and the running water jet header 41 is provided. , 48 ejection nozzles 42,
It is cooled by the water jetted from 49 and the discharge part 4
It is made to flow in 3, 50 and discharged to the drain groove 44. As a result, it becomes possible to simultaneously cut and remove the swells 15 of the joints 14 on the upper and lower surfaces of the rolled material, and the high temperature chips 45 are transferred to the upper chip discharge duct 39 and the lower chip discharge duct 46. Since it is captured and discharged to the drainage groove 44, there is no possibility that the hot chips 45 adhere to other devices or the like.

In the above embodiment, the rotary blade 32 is rotated in the direction opposite to the traveling direction of the rolled material, but it may be rotated in the traveling direction.

[0018]

EFFECTS OF THE INVENTION In the continuous hot rolling equipment of the present invention, rotary blades having a width equal to or larger than the maximum strip width of the rolled material are arranged between the joining device and the finishing rolling mill group respectively above and below the rolled material to reduce the rolling. The upper rotary cutter is supported by a chock that moves up and down by a cylinder, and the lower rotary knife is supported by a chock that moves up and down by a height adjustment cylinder. In addition to the powder discharge means, the lower chip discharge means having the water jetting means was provided on the chip discharge side of the lower rotary blade, so that the choke was performed by the reduction cylinder and the height adjustment cylinder while rotating the rotary blade at high speed. By pressing down the rotary blade through, the rear end of the preceding rolled material and the rising portion of the tip of the trailing rolled material joined by the joining device are cut and removed by the pair of upper and lower rotary blades, Rolling cutlery chips blown off in the direction of rotation by the high-speed rotation of the respectively stored in upper and lower chip discharge means, cuttings from flowing water injecting means is flowing water injection is discharged by flowing downward while being cooled. As a result, it is possible to simultaneously remove the raised portions on both surfaces of the joint by a continuous operation that matches the progress of the rolled material, and prevent hot chips from adhering to other equipment.

[Brief description of drawings]

FIG. 1 is a side view showing the concept of a continuous hot rolling facility according to an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a view taken along line III-III in FIG. 2;

FIG. 4 is a side view showing the concept of a conventional continuous hot rolling facility.

FIG. 5 is a side view showing a state of a joint portion.

FIG. 6 is a side view showing a state of a joint portion.

FIG. 7 is a side view showing a cutting state of a joint portion.

FIG. 8 is a schematic explanatory view of a chip removing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rough rolling mill 2 Finish rolling mill 3 Crop shear 4 Leading rough rolling material 5 Subsequent rough rolling material 6 Joining device 14 Joining part 15 Rise 31 Rise removing device 32 Rotating blade 33 Cutting blade 34 Housing 35 Rolling cylinder 36 Roll chock 37 Height adjustment cylinder 39 Upper chip discharge duct 40 Opening 41 Flowing water jet header 42 Jetting nozzle 43 Discharging section 44 Drain groove 45 Chips 46 Lower chip discharging duct 47 Opening 48 Streaming water jetting header 49 Jetting nozzle 50 Discharging section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mihiro Takagi 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Satoshi Nakagawa 4 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Chome 6-22 22 Mitsubishi Heavy Industries Ltd. Hiroshima Works (72) Inventor Tetsuo Ikuzaki 4-6-22 Kannon Shinmachi Nishi-ku, Hiroshima City Hiroshima Prefecture Mitsubishi Heavy Industries Ltd. Hiroshima Research Institute (72) Inventor Kibun Kuroda Hiroshima City Hiroshima 4-6-22 Kannon Shinmachi, Nishi-ku Mitsubishi Heavy Industries Ltd. Hiroshima Research Institute (72) Inventor Hideyuki Nikaido 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Works (72) Inventor Takeshi Hirabayashi Chiba 1 Kawasaki-cho, Chuo-ku, Chiba City Kawasaki Steel Co., Ltd. Inside the Chiba Steel Works (72) Inventor Shigefumi Katsura Chiba City, Chiba Prefecture 1st Kawasaki-cho, Kawasaki Steel Co., Ltd. in Chiba Works (72) Inventor Toshiaki Amagasa 1st Kawasaki-cho, Chuo-ku, Chiba Prefecture Chiba Steel Works (72) Inventor Jun Yuki Chuo, Chiba-shi 1 Kawasaki-cho, Ward Kawasaki Steel Co., Ltd. Chiba Works

Claims (1)

[Claims] 1. A continuous hot rolling facility for performing continuous rolling by providing a joining device for joining the trailing end of the preceding rolled material and the leading end of the trailing rolled material between the rough rolling mill group and the finishing rolling mill group. In the above, between the joining device and the finishing rolling mill group, rotary blades each having a width equal to or larger than the maximum strip width of the rolled material are arranged above and below the rolled material, and the rotary blade on the upper side of the chock that is moved up and down by a reduction cylinder. While supporting the lower rotary blade in a chock that moves up and down by a height adjusting cylinder, and providing an upper chip discharging means having a water jetting means on the chip discharging side of the upper rotary blade, and A continuous hot rolling facility, characterized in that a lower chip discharge means having a water jetting means is provided on the chip discharge side of the lower rotary cutting tool.