JP3771869B2 - Continuous hot rolling equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a continuous hot rolling facility that joins a preceding rolled material and a subsequent rolled material and continuously performs hot finish rolling.
[0002]
[Prior art]
In recent years, in hot rolling equipment such as steel strip, continuous hot rolling has been developed in which the preceding sheet bar and the succeeding sheet bar are joined between the rough rolling process and the finishing rolling process, and the finishing rolling is continuously performed. ing. FIG. 10 is a side view showing the outline of the main part of such a continuous hot rolling facility.
[0003]
As shown in FIG. 10, the crops at the rear end portion of the preceding sheet bar 51 and the front end portion of the subsequent sheet bar 52 that have been hot rough-rolled by the rough rolling machine row 60 are cut and removed by the crop shear 70, respectively. 80 is moved on the rail 89 by the carriage 82 at the same speed as the seat bars 51, 52, while the rear end and the front end are the entrance clamp 83 in the housing 81 and the entrance side in the inner frame 85. Clamping is performed by the clamp 86, and the temperature is raised by a heater 84 using, for example, eddy current of a high-frequency coil, and the inner frame 85 is moved to the outlet side to pressurize and join the rear end portion to the front end portion. Then, the joined sheet bars 51 and 52 are continuously rolled into a strip 53 having a required thickness by a finishing rolling mill row 90 and wound by a coiler (not shown).
[0004]
[Problems to be solved by the invention]
In the above-described conventional equipment, as shown in FIG. 11, when the pressure bonding is performed by induction heating described above, the bonding portion 50 has swells 58 formed on the upper surface and the lower surface due to compression by heating and pressure. Foreign matter 59 such as the scale of the sheet bars 51 and 52 gathers on the rise 58, and when rolled into the strip 53 by the finishing mill row 90, the foreign matter 59 is extended as shown in FIG. The quality is deteriorated by remaining in the strip 53 and causing the strength of the joint portion 50 to decrease.
[0005]
[Means for Solving the Problems]
The continuous hot rolling facility according to the present invention is configured as follows to provide means for solving the problems.
[0006]
(1) Between a joining device that joins the trailing end of the preceding rolled material after hot rough rolling and the leading end of the following rolled material, and a finish rolling mill row that continuously finish-rolls the rolled material after joining. And an upper rotary cutter and a lower rotary cutter each provided with a cutting blade on each outer peripheral surface, and a driving rotary means for rotating the upper rotary cutter, and an elevating means for raising and lowering the upper rotary cutter. A heat insulating cover capable of moving up and down between the upper part in the housing and the travel position of the rolled material and capable of covering the upper surface and both edge portions of the rolled material at the travel position of the rolled material ; The joint swell removal device provided is provided.
[0007]
(2) The upper and lower bearing boxes provided so as to move up and down in the housing by supporting the driving side shaft portion and the working side shaft portion of the upper rotary cutter and the lower rotary cutter, respectively. And an oil supply coupler provided in the housing so as to be engaged with an oil supply port of each bearing box, an elevating means interposed between each bearing box and the housing, both upper bearing boxes or the above A rolling force detector interposed between the lower bearing boxes and the lifting means is provided.
[0008]
[Action]
According to the items (1) and (2), the end portion of the preceding rolled material that has been hot rough-rolled and the end portion of the subsequent rolled material are joined by heating and pressurizing using a joining device.
Next, the heat insulating cover is positioned above the upper rotary blade, and the height of the lower surface of the cutting blade of the upper rotary blade and the upper surface of the cutting blade of the lower rotary blade is raised and lowered in the same manner as the items (1) and (2). It adjusts by a means, drives and rotates this upper rotary cutter and lower rotary cutter, and waits.
When the joining portion comes to the swell removal device, the upper surface of the cutting blade of the lower rotary cutter is raised to the height of the pass line by the lifting means while detecting the rolling force by the rolling force detector, and the upper rotary blade is raised and lowered. The swell is reduced by means, and the rise of the joint is removed by cutting.
In this way, the rolled material that has been joined one after another and cut and removed the swelled foreign matter is continuously hot-rolled into strips having a required plate thickness by a finish rolling mill.
When the rolled material is run with the upper and lower rotary cutters and their bearing housings pulled out of the housing for recombination after removing the rise of the joints, the heat insulating cover is lowered by the lifting means to lower the upper surface of the rolled material. Covers both edges and insulates the rolling force detector and lubrication coupler from the radiant heat of the hot rolling material to eliminate the temperature rise, shortening the service life due to reduced accuracy of the rolling force detector and deterioration of the lubrication coupler's O-ring To prevent
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the continuous hot rolling facility according to the present invention will be described in detail with reference to examples.
[0010]
[First embodiment]
[Constitution]
In FIG. 1, a crop shear 70 is disposed downstream of the rough rolling mill row 60, and an output side clamp 83 in the housing 81 and an inner movable in the rolling direction within the housing 81 are disposed on the exit side of the crop shear 70. A joining device 80 including an entrance side clamp 86 in the frame 85, an induction heating type heater 84 using, for example, a high frequency coil, and a carriage 82 is disposed. Between this joining device 80 and the finishing rolling mill row 90 downstream thereof, the swell removal device 10 including the upper rotary cutter 1 and the lower rotary cutter 2 and the connecting shaft 13 constituting the lifting and lowering synchronizing means is disposed. ing.
There is also a facility in which a coil box for temporarily storing sheet bars 51 and 52 in a coil shape is disposed between the rough rolling mill row 60 and the crop shear 70.
[0011]
2 and 3, circular saw blade-shaped cutting blades 1a and 2a are formed on the outer peripheral surfaces of the upper rotary blade 1 and the lower rotary blade 2, respectively. The shafts on the drive side D and the work side W of the upper rotary blade 1 are rotatably supported by an upper drive side bearing box 3d and an upper work side bearing box 3w that are moved up and down by the reduction cylinder 7 in the upper part of the housing 9. The shafts on the drive side D and the work side W of the lower rotary cutter 2 are rotatably supported by a lower drive side bearing box 4d and a lower work side bearing box 4w which are moved up and down by a height adjusting cylinder 8 in the lower part of the housing 9. ing. It should be noted that a screw jack can be used in place of the reduction cylinder 7 and the height adjustment cylinder 8 as the raising / lowering means for each of the bearing housings 3d, 3w, 4d, 4w.
[0012]
The shaft portions of the upper rotary cutter 1 and the lower rotary cutter 2 supported by the upper and lower drive side bearing boxes 3d and 4d and projecting to the drive side D are connected to the drive device by universal joints (not shown).
[0013]
A rack 11 is mounted on the exit side of each of the bearing boxes 3d, 3w, 4d, and 4w, and a pinion 12 that meshes with the rack 11 is fitted to the end of the drive side D and the end of the work side W. A connecting shaft 13 is rotatably mounted on a bearing 14 in the housing 9.
The swell removal apparatus 20 shown in FIG. 1 is comprised by the above member, site | part, and apparatus.
[0014]
[Action / Effect]
As shown in FIG. 1, the rear end portion of the preceding sheet bar 51 and the front end portion of the subsequent sheet bar 52 that have been hot rough-rolled by the rough rolling mill group 60 are cut and removed by a crop shear 70, respectively. The rear end portion and the front end portion are clamped by the output side clamp 83 and the input side clamp 86 while traveling at the same speed as the travel of the seat bars 51, 52 by the carriage 82, and the temperature is raised by the heater 84. By moving the inner frame 85 to the outlet side, the rear end portion is pressurized and joined to the front end portion.
[0015]
Next, as shown in FIG. 2 and FIG. 3, the upper rotary cutter 1 while the height of the upper drive side bearing box 3 d and the upper work side bearing box 3 w are synchronized by the rack 11, the pinion 12 and the connecting shaft 13. The lower height of the cutting blade 1a is adjusted by the reduction cylinder 7 on the driving side D and the working side W, and the lower driving side bearing box 4d and the lower working side bearing box 4w are connected to the rack 11, the pinion 12 and the connecting shaft 13 thereof. The upper height of the cutting blade 2a of the lower rotary cutter 2 is adjusted by the height adjusting cylinder 8 on the driving side D and the working side W while the height is synchronized with the above, and the upper and lower universal joints are adjusted by a driving device (not shown). The upper rotary knife 1 and the lower rotary knife 2 are driven and rotated in opposite directions to stand by.
[0016]
When the joining portion 50 between the preceding sheet bar 51 and the succeeding sheet bar 52 comes to the swell removal device 20, the heights of the driving side D and the working side W of the upper surface of the cutting blade 2a of the lower rotary blade 2 are the same as described above. While being synchronized, the height adjustment cylinder 8 is used to raise the height of the pass line, and while the height of the driving side D and the working side W of the upper rotary blade 1 is synchronized, the pressure is reduced by the reduction cylinder 7 so that the joint 50 is filled. The ascending 58 is removed by cutting.
[0017]
As shown in FIG. 4, by driving and rotating the upper rotary cutter 1 and the lower rotary cutter 2, the cutting blade 1a cuts the upper surface of the joint portion 50 and the cutting blade 2a cuts the lower surface of the joint portion 50, The swell 58 where the foreign matter 59 such as the scale of the sheet bars 51 and 52 gathers is removed.
[0018]
At the time of cutting and removing both surfaces of the climax 58, the upper and lower drive side bearing boxes 3d and 4d and the work side bearing boxes 3w and 4w are connected by the connecting shaft 13 and moved up and down, so The difference between the operating error of the height adjusting cylinder (or the operating error of the screw jack) and the backlash is eliminated, and the errors in the heights (intervals) of the driving side D and the working side W of the upper and lower cutting blades 1a, 2a are both racks 11. Only the difference in backlash between the pinion 12 and the pinion 12, and the difference between the thicknesses at the end portions in the plate width direction of the driving side D and the working side W of the subsequent sheet bar 52 and the preceding sheet bar 51 after cutting and removal of the joint portion 50. Make it smaller.
[0019]
As shown in FIG. 1, the sheet bars 51 and 52, which are joined one after another in this manner and cut and remove the foreign matter 59 on the rise 58, are hot-rolled continuously to a strip 53 having a required thickness by a finish rolling mill row 90 as shown in FIG. Then, it is cut into a length suitable for winding by a cutting device (not shown) and wound by a coiler.
[0020]
In the above embodiment, the rack 11 may be provided on the housing 9 side, and the pinion 12 and the connecting shaft 13 may be provided on the upper and lower drive side bearing boxes 3d and 4d and the work side bearing boxes 3w and 4w.
[0021]
[Second Embodiment]
[Constitution]
In FIG. 5, the same crop shear 70 and joining device 80 as those in the first embodiment are arranged downstream of the rough rolling mill row 60. Between this joining device 80 and the finishing rolling mill row 90 downstream thereof, a swell removal device 40 having an upper rotary cutter 21, a lower rotary cutter 22, a heat insulating cover 31, a lift bar 32, and the like is disposed. .
There is also a facility in which a coil box for temporarily storing sheet bars 51 and 52 in a coil shape is arranged between the rough rolling mill row 60 and the crop shear 70.
[0022]
6 and 7, circular saw blade-like cutting blades 21a and 22a are formed on the outer peripheral surfaces of the upper rotary cutter 21 and the lower rotary cutter 22, respectively. The shafts on the drive side D and the work side W of the upper rotary cutter 21 are rotatably supported by an upper drive side bearing box 23d and an upper work side bearing box 23w which are moved up and down by a reduction cylinder 27 in the upper part of the housing 29. The shafts on the drive side D and the work side W of the rotary blade 22 are rotatably supported by a lower drive side bearing box 24d and a lower work side bearing box 24w which are moved up and down by a height adjusting cylinder 28 in the lower part of the housing 29. . It should be noted that a screw jack can be used in place of the reduction cylinder 27 and the height adjustment cylinder 28 as the raising / lowering means for each of the bearing housings 23d, 23w, 24d, 24w.
[0023]
The shaft portions of the upper rotary cutter 21 and the lower rotary cutter 22 supported by the upper and lower drive side bearing boxes 23d and 24d and protruding to the drive side D are connected to the drive device by universal joints (not shown).
[0024]
The upper drive side bearing box 23d and the upper work side bearing box 23w and both the reduction cylinders 27 are provided with a load cell 26 as a reduction force detector. The load cell 26 can also be interposed between the lower bearing boxes 24d and 24w and the height adjusting cylinder 28.
[0025]
The bearing housings 23d, 23w, 24d, and 24w are provided with oil supply ports 25d and 25w, respectively. A drive-side oil supply coupler 30d and a work-side oil supply coupler 30w that are engaged with the oil supply ports 25d and 25w and moved up and down are provided. Each housing 29 is mounted. The work-side oil supply coupler 30w is installed on the outer surface of the work side W of the housing 29 so as not to be an obstacle when the upper rotary cutter 21 and the lower rotary cutter 22 are rearranged.
[0026]
A pair of support bases 36 are installed on a connecting beam 29a that connects both housings 29, and a lift bar 32 can be moved up and down on a guide tube 34 that is fixed through the support bases 36. It is inserted. The upper ends of both lift bars 32 are connected by a connecting plate 33, and a heat insulating cover 31 is attached to the lower ends.
[0027]
A mount 37 is installed on the upper surface of the housing 29 on the drive side D and the work side W, and the rod portion of the elevating cylinder 35 installed through the mount 37 is connected to the connecting plate 33.
[0028]
Note that a rack and pinion system can be used instead of the elevating cylinder 35 as the elevating means.
The swell removal apparatus 40 shown in FIG. 5 is comprised by the above member, site | part, and apparatus.
[0029]
[Action / Effect]
As shown in FIG. 5, the rear end portion of the preceding sheet bar 51 and the front end portion of the succeeding sheet bar 52 that have been hot rough-rolled by the rough rolling mill row 60 are cut and removed by the crop shear 70, respectively. Similarly, the rear end portion and the front end portion are joined by the joining device 80.
[0030]
Next, as shown in FIGS. 6 and 7, the heat insulating cover 31 is positioned above the upper rotary cutter 21, the lower height of the cutting blade 21 a of the upper rotary cutter 21 is adjusted by both the reduction cylinders 27, and The upper height of the cutting blade 22a of the lower rotary cutter 22 is adjusted by both height adjusting cylinders 28, and the upper and lower rotary cutters 21 and 22 are driven and rotated in opposite directions to stand by.
[0031]
When the joining portion 50 between the preceding sheet bar 51 and the succeeding sheet bar 52 comes to the swell removal device 40, the upper surface of the cutting blade 22a of the lower rotary cutter 22 is raised to the height of the pass line by the adjusting cylinder 28, and the load cell 26 The upper rotary blade 21 is squeezed by the squeezing cylinder 27 while detecting the squeezing force, and the rising 58 of the joint 50 is removed by cutting.
[0032]
In this way, the sheet bars 51 and 52, which are joined one after another and cut off the foreign matter 59 of the rising 58, are continuously hot-rolled into a strip 53 having a required thickness by a finishing rolling mill row 90 as shown in FIG. Then, it is cut into a length suitable for winding by a cutting device (not shown) and wound by a coiler.
[0033]
As shown in FIGS. 8 and 9, after cutting and removing the swell 58 of the joint 50, the upper rotary blade 21 and its bearing box 23 d and 23 w and the lower rotary knife 22 and its bearing box 24 d and 24 w are rearranged. When the seat bars 51 and 52 are caused to travel while being pulled out from the housing 29, the heat-insulating cover 31 is lowered by the elevating cylinder 35 via the connecting plate 33 and both the elevating bars 32 to cover the seat bars 51 and 52. 26 and the drive-side oil supply coupler 30d are insulated from the radiant heat of the high-temperature seat bars 51 and 52 to eliminate the temperature rise, and the life of the load cell 26 is reduced, and the life is shortened due to deterioration of the O-ring of the drive-side oil supply coupler 30d. To prevent.
In addition, since the working-side oil supply coupler 30w is behind the housing 29, its temperature rise is small.
[0034]
Needless to say, the present invention is not limited to the above-described embodiment, and various modifications such as using a fixed joining device instead of the traveling type can be made without departing from the gist of the present invention.
[0035]
【The invention's effect】
In Claim 1 and 2, the joining part swell removal apparatus provided with the upper rotary cutter and the lower rotary cutter which each provided the cutting blade in the outer peripheral surface is provided between the joining apparatus and the finishing rolling mill row on the exit side. By arranging and cutting the bulge of the joint between the preceding rolled material and the subsequent rolled material, the bulged material on which scales and other foreign matter have gathered can be reliably removed. At this time, no foreign matter remains and intervenes, and deterioration of the quality can be prevented.
Also, a heat insulating cover is provided at the top of the housing so as to be raised and lowered, and when the upper and lower rotary cutter and its bearing box are pulled out from the housing for recombination, the heat insulating cover is lowered to the running position of the hot rolling material. By covering the upper surface and both edges, for example, the driving force and working side rolling force detectors and the oil supply couplers of each bearing box are insulated from the radiant heat of the hot rolling material to eliminate the temperature rise, and the rolling force It is possible to prevent a shortening of the service life due to deterioration in accuracy of the detector and deterioration of the O-ring of the fueling coupler.
[Brief description of the drawings]
FIG. 1 is a side view showing an outline of a main part of a continuous hot rolling facility as a first embodiment of the present invention.
2 is a front view of the swell removal device of FIG. 1 with the outlet side of the housing cut away. FIG.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a side view schematically showing a state in which the bulge of the joint in FIG. 2 has been removed by cutting. FIG.
FIG. 5 is a side view showing an outline of a required part of a continuous hot rolling facility as a second embodiment of the present invention.
6 is a front view of the swell removal device of FIG. 5 with the outlet side of the housing cut away. FIG.
7 is a cross-sectional view taken along line VII-VII in FIG.
FIG. 8 is a side view showing the operation of the heat insulating cover by breaking the outlet side of the housing of the swell removal device in a state where the vertical rotary cutter and its bearing box are similarly removed.
9 is a front view taken along the line IX-IX in FIG.
FIG. 10 is a side view showing an outline of a main part of a conventional continuous hot rolling facility.
FIG. 11 is a side view schematically showing a sheet bar joining portion.
FIG. 12 is a side view schematically showing a state in which a conventional rough rolled material joint has been finish-rolled.
[Explanation of symbols]
1,21 Upper rotary cutter 1a, 21a Cutting blade 2,21 Lower rotary cutter 2a, 22a Cutting blade 3d, 23d Upper drive side bearing box 3w, 23w Upper work side bearing box 4d, 24d Lower drive side bearing box 4w, 24w Lower Work side bearing box 7, 27 Reduction cylinder 8, 28 Height adjustment cylinder 9, 29 Housing 11 Rack 12 Pinion 13 Connecting shaft 20, 40 Swelling removal device 26 Load cell 30d Drive side oil supply coupler 30w Work side oil supply coupler 31 Heat insulation cover 32 Elevating bar 35 Elevating cylinder 50 Joining part 51 Leading sheet bar 52 Subsequent sheet bar 53 Finishing rolled material 58 Swelling 80 Joining apparatus 90 Finishing rolling mill row D Driving side W Working side

Claims (2)

Between the joining device that joins the rear end of the preceding rolled material after hot rough rolling and the front end of the subsequent rolled material, and the finish rolling mill row that continuously finish-rolls the rolled material after joining, An upper rotary cutter and a lower rotary cutter each provided with a cutting blade on the outer peripheral surface are provided. The upper rotary cutter has a driving rotary means for rotating the lower rotary cutter, and an elevating means for raising and lowering the lower rotary cutter. A heat-insulating cover capable of moving up and down between the upper part and the rolling material traveling position, and capable of covering the upper surface and both edge portions of the rolled material at the rolling material traveling position, and a joining mechanism provided with lifting means for lifting and lowering the heat- insulating cover A continuous hot rolling facility provided with a partial swell removal device.  The joint swell removal device includes upper and lower bearing boxes provided to support the drive side shaft portion and the work side shaft portion of the upper rotary cutter and the lower rotary cutter, respectively, and to move up and down in the housing. An oil supply coupler provided in the housing so as to be engaged with an oil supply port of each bearing box; lifting means interposed between the bearing box and the housing; and both upper bearing boxes or both lower 2. The continuous hot rolling facility according to claim 1, further comprising a rolling force detector interposed between the bearing box and the elevating means.

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