WO2009090993A1 - 搬送装置及び熱間圧延装置、並びに搬送方法及び熱間圧延方法 - Google Patents
搬送装置及び熱間圧延装置、並びに搬送方法及び熱間圧延方法 Download PDFInfo
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- WO2009090993A1 WO2009090993A1 PCT/JP2009/050462 JP2009050462W WO2009090993A1 WO 2009090993 A1 WO2009090993 A1 WO 2009090993A1 JP 2009050462 W JP2009050462 W JP 2009050462W WO 2009090993 A1 WO2009090993 A1 WO 2009090993A1
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- impact
- transport
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/02—Observation or illuminating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/02—Skids or tracks for heavy objects
- F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0035—Forging or pressing devices as units
- B21B15/005—Lubricating, cooling or heating means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
Definitions
- the present invention relates to a conveying device, a hot rolling device, a conveying method, and a hot rolling method.
- a hot rolling apparatus that performs hot rolling of a workpiece such as a steel plate has a roughing mill and a finish rolling mill, and further has a heating furnace, a holding furnace, a shearing machine, a winder, and the like. ing.
- the hot rolling apparatus as described above first heats the work piece in a heating furnace, then roughly rolls the work piece in a rough rolling machine, and conveys the work piece while reheating and keeping the temperature in a heat holding furnace. Then, the tip and end of the workpiece are cut off by a shearing machine, the workpiece is finish-rolled by a finish rolling mill, and wound by a winder.
- the conveyance roller in the heat-retaining furnace is made of heat-resistant steel so as to withstand high temperatures.
- the transport roller in the heat-retaining furnace receives an impact from the workpiece.
- the internal temperature of the heat-retaining furnace is set so as not to impair the strength of the conveying roller, and the work-conveying speed in the heat-retaining furnace is affected by an impact that exceeds the impact that the conveying roller can withstand. It is set so as not to be applied to the roller.
- the internal temperature is set to 1000 ° C. or less, and the conveyance speed is set to about 100 m / min.
- the internal temperature of the heat-retaining furnace and the conveying speed are limited, and the heat-retaining furnace has not been increased in temperature and speed, but from a metallurgical standpoint, it can be higher than the current set temperature. It is desirable to increase the conveyance speed from the viewpoint of work efficiency. However, if the conveyance speed in the heat-retaining furnace is increased, there arises a problem that the impact received by the conveyance roller from the deformed portion of the workpiece increases. Moreover, when the inside of a heat-retaining furnace is made high temperature, the problem that the intensity
- the present invention has been made in view of the above-described circumstances, and is capable of preventing the conveyance roller from being damaged while increasing the temperature and speed of hot rolling, as well as the conveying method and hot rolling.
- the purpose is to propose a method.
- a conveying device that has a plurality of conveying rollers supported in parallel at a predetermined interval, and conveys a workpiece from a rolling mill into a heat insulation furnace by the conveying rollers.
- An impact prediction data collection unit that acquires data for predicting the magnitude of impact exerted by the workpiece on the in-furnace roller, which is the transport roller in the incubator, upstream of the incubator. And the impact prediction data collecting unit predicts the magnitude of the impact, and adjusts the conveyance speed of the workpiece in the heat insulating furnace according to the magnitude of the impact. And a control unit.
- the impact prediction data collection unit is provided in a bearing unit that supports at least one of the transport rollers, and is at least one of deformation and vibration of the bearing unit.
- the data for obtaining the data as the data was adopted.
- the impact prediction data collection unit includes an imaging device, and the imaging device captures an image of the workpiece transported upstream of the heat-retaining furnace, as the data. Adopted what to get as.
- the heat-retaining furnace employs a heat-retaining furnace that retains the workpiece at a temperature of 1000 ° C. or higher.
- a maximum conveyance speed of the workpiece by the in-furnace roller is 200 m / min or more.
- the workpiece heated in a heating furnace is rolled in a roughing mill, conveyed to a finishing mill while adjusting the temperature in a holding furnace, and rolled by the finishing mill.
- a hot rolling apparatus is provided that includes the conveying apparatus according to the first aspect of the present invention.
- a transport method for transporting a workpiece from a rolling mill to a heat-retaining furnace by moving on a plurality of transport rollers supported in parallel at a predetermined interval. Predict the magnitude of impact that the workpiece gives to the in-furnace roller, which is the transport roller in the incubator, upstream of the incubator, and in accordance with the predicted magnitude of the incubator.
- a method characterized by adjusting the conveying speed of the workpiece in the furnace was adopted.
- a method is used in which the impact is predicted based on at least one of deformation and vibration of a bearing portion that supports at least one of the transport rollers.
- the method of keeping the workpiece at a temperature of 1000 ° C. or higher is adopted as the holding furnace.
- the maximum conveyance speed of the workpiece by the in-furnace roller is 200 m / min or more.
- a fourth aspect of the present invention is a hot rolling method for hot rolling a workpiece, wherein the workpiece is conveyed by the conveying method according to the third invention. did.
- the magnitude of the impact that the in-furnace roller receives from the work piece is estimated upstream of the heat-retaining furnace, and the work piece in the heat-retaining furnace is determined according to the predicted magnitude of the shock. Therefore, when the impact is predicted to be small, the transport speed can be increased, and when the impact is predicted to be large, the transport speed can be decreased. Therefore, even if the internal temperature of the heat-retaining furnace is increased and the strength of the in-furnace roller is weaker than in the case of the conventional set temperature, the magnitude of impact that the strength of the in-furnace roller can withstand is grasped, By adjusting the conveyance speed so that no further impact is applied, the conveyance speed can be appropriately increased. Therefore, in hot rolling, especially after rough rolling and before finishing rolling, the processing temperature is increased and the conveying speed is appropriately increased, so that the hot rolling is generally performed at a higher temperature and speed, The inner roller can be prevented from being damaged.
- FIG. 1 It is a figure which shows schematic structure and functional structure of the conveying apparatus in one Embodiment of this invention, and a hot rolling apparatus provided with the same. It is a perspective view of a rear surface table and a heat-retaining furnace in the embodiment. It is the front view and side view of the axle box in the said embodiment. It is a perspective view which shows the data collection part for impact prediction in the modification of the said embodiment.
- FIG. 1 is a diagram illustrating a schematic configuration and a functional configuration of a conveying device 20 and a hot rolling device 1 including the same according to an embodiment of the present invention.
- the hot rolling apparatus 1 of the present embodiment includes a heating furnace 2, a front table 3, a roughing mill 4, a rear table 5, a heat holding furnace 6, a shearing machine 7, a finishing mill 8, and a cooling apparatus. 9, a winder 10, a control unit 11, and an impact prediction data collecting unit 12.
- the heating furnace 2 heats the slab X (workpiece) containing copper and made of steel as a main component to a temperature suitable for the rough rolling process before rolling by the rough rolling mill 4.
- the front table 3 is disposed at the rear stage of the heating furnace 2 and includes a plurality of conveying rollers 3a arranged in the line direction. This front table 3 conveys the slab X carried out from the heating furnace 2 to the roughing mill 4 and moves the slab X downward when the slab X is reciprocated and repeatedly rolled by the roughing mill 4 described later. It is to support from.
- the rough rolling mill 4 includes a pair of rotating rolling rollers 41 and 42, and rolling the slab X between the rolling rollers 41 and 42 to form the slab X into a metal plate Y (workpiece). To do. Although the rolling rollers 41 and 42 are rotationally driven in synchronization, the rotation direction is reversible. For this reason, it is possible to repeatedly perform the rolling process while reciprocating the slab X.
- FIG. 2 is a perspective view of the rear table 5 and the heat-retaining furnace 6.
- the rear table 5 includes a plurality of conveying rollers 5a, shaft boxes 50 and 51, a drive shaft 52, a motor 53, and a gear box 54 arranged in the line direction. While being conveyed to the heat-retaining furnace 6 and repeatedly rolling the slab X reciprocated by the rough rolling mill 4, the slab X is supported from below.
- the axle boxes 50 and 51 rotatably support the transport roller 5a.
- the drive shaft 52 is connected to the conveyance roller 5 a, and the driving force of the motor 53 is transmitted to the drive shaft 52 via a gear housed in the gear box 54.
- the length of the rear table 5 is set to be longer than the length of the slab X protruding from the rough rolling mill 4 in the final reciprocating movement of the slab X from the rough rolling mill 4 toward the heat-retaining furnace 6.
- the final reciprocation refers to a reciprocation (pass before the final pass) before the slab X is finally sent from the roughing mill 4 to the finishing mill 8. That is, the length that the slab X protrudes from the rough rolling mill 4 in the final reciprocating movement is the rough rolling before the slab X is finally sent from the rough rolling mill 4 to the finishing mill 8 (pass before the final pass). This is the length of the slab X protruding from the machine 4.
- the length of the rear surface table 5 is longer than the protruding length of the slab X when the slab X protrudes most from the roughing mill 4 toward the heat-retaining furnace 6 in the final reciprocation. It is set long. For this reason, in the rolling process of the slab X in the rough rolling mill 4, the tip of the slab X does not reach the heating furnace 6, and the slab X is maintained in the rolling process period of the slab X in the rough rolling mill 4. There is no exposure to the internal atmosphere of the heating furnace 6.
- the holding furnace 6 includes a tunnel furnace 61 and a heating burner 62, and holds and holds the metal plate Y separately from the heating furnace 2.
- the temperature is about 1100 ° C.
- This heat-retaining furnace 6 has a length (for example, 60 to 70 m) close to the entire length of the metal plate Y carried out from the rough rolling mill 4 and can keep the metal plate Y without bending.
- a plurality of transport rollers 6a are arranged in the line direction inside the heat insulating furnace 6, and the metal plate Y is movably supported by these transport rollers 6a.
- the transport roller 6a is rotationally driven by the driving force of the driving motor 6b.
- the conveyance speed of the metal plate Y in the heat-retaining furnace 6 is about 300 m / min when the metal plate Y has little swell and warp, and most when the swell and warp are large. It is about 100 m / min at the latest.
- the conveying roller 6a is made of heat-resistant steel that maintains a predetermined strength even at 1100 ° C.
- conveying apparatus 20 with which this hot rolling apparatus 1 is provided is comprised by the front table 3, the rear surface table 5, the conveyance roller 6a, and the drive motor 6b.
- the shearing machine 7 is installed at the rear stage of the heat-retaining furnace 6 and is for cutting the front end of the metal plate Y carried out of the heat-retaining furnace 6.
- the finish rolling mill 8 is configured by arranging a plurality of rolling mills 81 constituted by a plurality of rolling rollers 8 a along the line, and further rolling the metal plate Y carried out from the heat-retaining furnace 6. By adjusting the shape.
- the cooling device 9 is installed in the subsequent stage of the finish rolling mill 8 and cools the metal plate Y whose shape is adjusted by the finish rolling mill 8.
- the metal plate Y is cooled by water cooling. Cool down.
- the winder 10 is installed in the subsequent stage of the cooling device 9 and winds up the metal plate Y cooled by the cooling device 9.
- the control unit 11 supervises the entire operation of the hot rolling apparatus 1, and includes a heating furnace 2, a front table 3, a roughing mill 4, a rear table 5, a heating furnace 6, a shearing machine 7, and a finishing mill. 8, the cooling device 9, the winder 10, and the impact prediction data collecting unit 12 are electrically connected.
- the control unit 11 includes a data processor 111 and a data storage unit 112 as shown in FIG.
- the data processor 111 determines the rotational speed of the transport roller 6a based on the data input from the impact prediction data collection unit 12, and controls the drive motor 6b.
- the data storage 112 stores data input from the impact prediction data collecting unit 12 via the data processor 111.
- FIG. 3 is a front view (FIG. 3A) and a side view (FIG. 3B) of the axle box 50 (bearing portion).
- the impact prediction data collection unit 12 includes a shaft box 50, a plate detection HMD (Hot Metal Detector) 121, and a speed detector 122.
- HMD Hot Metal Detector
- the axle box 50 includes an annular portion 501 and a pedestal portion 502.
- the annular portion 501 is an annular portion that grips the end portion of the transport roller 5a.
- the pedestal portion 502 has a substantially trapezoidal shape that extends in the width direction of the shaft from the lower portion of the annular portion 501, and is a portion that supports the annular portion 501.
- the pedestal portion 502 is formed thin by forming a recess 502a on the lower surface.
- the central portion of the recess 502 a is formed substantially along the curvature of the annular portion 501.
- the pedestal portion 502 includes detachable support bolts 502b for reinforcing the thin pedestal portion 502 as needed on both sides of the recess 502a.
- the pedestal 502 includes a strain gauge 502c attached to the center of the recess 502a and an accelerometer 502d disposed at a position that does not overlap the strain gauge 502c in the recess 502a.
- the strain gauge 502c outputs a signal corresponding to the strain generated in the central portion of the recess 502a to the data processor 111.
- the accelerometer 502d outputs the measurement value to the data processor 111.
- the plate detection HMD 121 is installed upstream of the axle box 50 and outputs a signal indicating that the metal plate Y has approached the axle box 50 to the data processor 111 when the metal plate Y is detected.
- the speed detector 122 is attached to the gear box 54 and detects the rotational speed of the drive shaft and outputs it to the data processor 111.
- the data processor 111 calculates the transport speed of the metal plate Y based on the rotational speed of the drive shaft input from the speed detector 122.
- the heated slab X is supplied to the roughing mill 4.
- the slab X supplied to the rough rolling mill 4 is reciprocated a plurality of times (for example, three times) by the rough rolling mill 4 and is repeatedly rolled to be formed into the metal plate Y.
- the hot rolling apparatus 1 while the slab X is being rolled by the rough rolling mill 4, the slab X is supported from below by the front table 3 or the rear table 5, and the slab X advances. It is possible to move left and right with respect to the direction.
- the metal plate Y formed by the roughing mill 4 is supplied to the heat-retaining furnace 6 through the rear table 5 at a rate of 100 to 300 m / min and is kept at a temperature of about 1100 ° C.
- the metal plate Y unloaded from the heat-retaining furnace 6 is cut at the tip by the shearing machine 7 and then further rolled by the finishing mill 8 to a desired thickness.
- the metal plate Y rolled by the finish rolling mill 8 is cooled by the cooling device 9 and then wound by the winder 10.
- the conveyance speed of the metal plate Y in the heat-retaining furnace 6 is controlled by the control unit 11. The process will be described in detail below.
- the control unit 11 predicts the magnitude of the impact that the metal plate Y conveyed on the rear table 5 gives to the conveyance roller 5 a.
- the plate detection HMD 121 detects the metal plate Y and outputs a signal to the data processor 111
- the data processor 111 is generated in the pedestal portion 502 by a signal input from the strain gauge 502c. While calculating a distortion, the vibration which has arisen in the base part 502 is calculated with the signal input from the accelerometer 502d.
- the data processor 111 calculates the magnitude of the impact that the metal plate Y gives to the transport roller 5a from the strain and vibration, and uses the calculated value as the magnitude of the impact that the metal plate Y gives to the transport roller 6a. This is the predicted value.
- the data processor 111 determines an appropriate value for the conveyance speed of the metal plate Y in the heat insulating furnace 6 based on the predicted value. And the data processor 111 adjusts the conveyance speed of the metal plate Y in the heat-retaining furnace 6 by controlling the drive motor 6b, and is calculated from the rotational speed input from the speed detector 122 together with this. The motor 53 is controlled so that the transport speed is close to the appropriate value.
- the inside of the heat-retaining furnace 6 is set to a higher temperature than the conventional value of 1100 ° C., and the conveyance speed of the metal plate Y is set to a high speed of about 3 times the conventional value of 300 m / min.
- the transport speed of the metal plate Y is decreased. By doing so, the magnitude of the impact applied to the transport roller 6a can be reduced.
- the magnitude of the impact received by the transport roller 6a from the metal plate Y is predicted upstream of the heat insulating furnace 6, and the metal plate Y is transported in the heat insulating furnace 6 according to the predicted magnitude of the impact. Since the speed is adjusted, the transport speed can be increased when the impact is predicted to be small, and the transport speed can be decreased when the impact is predicted to be large. Therefore, even if the internal temperature of the heat-retaining furnace 6 is increased and the strength of the transport roller 6a becomes weaker than the conventional set temperature, the magnitude of impact that the strength of the transport roller 6a can withstand is grasped. By adjusting the conveyance speed so that no further impact is applied, the conveyance speed can be appropriately increased. Therefore, in hot rolling, especially after rough rolling and before finishing rolling, the processing temperature is increased and the conveying speed is appropriately increased, so that the hot rolling is generally performed at a higher temperature and speed, The inner roller can be prevented from being damaged.
- FIG. 4 is a perspective view showing the impact prediction data collecting unit 212 in the modified example.
- the impact prediction data collection unit 212 in this modification includes an imaging device 212a instead of the axle box 50 and the plate detection HMD 121 provided in the impact prediction data collection unit 12 of the above embodiment.
- the impact prediction data collection unit 212 includes a speed detector 122 similar to that included in the impact prediction data collection unit 12 of the above embodiment, in addition to the imaging device 212a.
- the difference with the said embodiment in this modification is above, and the other part is the same as that of the said embodiment.
- the imaging device 212 a captures the rear table 5 and outputs the captured video to the data processor 111.
- the data processor 111 analyzes the undulation, warpage, and vibration state of the metal plate Y based on the image input from the imaging device 212a, and based on the analysis result, the data processor Y of the metal plate Y in the heat insulating furnace 6 is analyzed. Determine an appropriate value for the transport speed. According to such a configuration, the same effect as in the above embodiment can be obtained.
- the hot rolling is generally performed at a high temperature and high speed by increasing the processing temperature and appropriately increasing the conveying speed in the hot rolling, particularly after rough rolling and before finishing rolling.
- damage to the in-furnace roller can be prevented.
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Abstract
Description
本願は、2008年1月17日に日本国に出願された特願2008-008136号に基づき優先権を主張し、その内容をここに援用する。
上記のような熱間圧延装置は、まず被工作物を加熱炉で加熱し、続いて被工作物を粗圧延機で粗圧延し、被工作物を保加熱炉で再加熱・保温しながら搬送し、被工作物の先端及び終端をシャーリングマシンで切り落とし、仕上圧延機で被工作物を仕上圧延して、巻取機で巻き取る。
しかしながら、粗圧延後の被工作物(特に先端部)には、うねりや反り等の変形があるため、保加熱炉内の搬送ローラは、被工作物から衝撃を受ける。
このため、保加熱炉の内部温度は、搬送ローラの強度を損なわない程度に設定され、且つ、保加熱炉内での被工作物の搬送速度は、搬送ローラが耐え得る衝撃を上回る衝撃が搬送ローラに加わらない程度に設定される。具体的には、内部温度が1000℃以下、搬送速度が100m/分程度とされている。
しかし、仮に、保加熱炉内の搬送速度を速くすると、被工作物の変形部分から搬送ローラが受ける衝撃が大きくなってしまうという問題が生じる。また、保加熱炉内を高温にすると、搬送ローラの強度が弱まってしまうという問題が生じる。
本発明の第一の態様としては、所定間隔で並列に支持された複数本の搬送ローラを有し、該搬送ローラによって、圧延機から保加熱炉内へと被工作物を搬送する搬送装置であって、前記保加熱炉の上流で、該保加熱炉内の前記搬送ローラである炉内ローラに前記被工作物が与える衝撃の大きさを予測するためのデータを取得する衝撃予測用データ採集部と、前記衝撃予測用データ採集部が取得した前記データから衝撃の大きさを予測し、該衝撃の大きさに応じて、前記保加熱炉内での前記被工作物の搬送速度を調節する制御部と、を備えることを特徴とするものを採用した。
したがって、保加熱炉の内部温度を高温化して、仮に炉内ローラの強度が従来の設定温度の場合よりも弱くなったとしても、炉内ローラの強度が耐え得る衝撃の大きさを把握し、それ以上の衝撃が加わることのないように搬送速度を調節することにより、適切に搬送速度を高速化できる。
よって、熱間圧延の特に粗圧延後から仕上圧延前までにおいて、処理温度を高温化し、搬送速度を適切に高速化することにより、熱間圧延を全体的には高温・高速化しつつも、炉内ローラの破損を防ぐことができる。
2…加熱炉
3…前面テーブル
3a…搬送ローラ
4…粗圧延機
5…後面テーブル
5a…搬送ローラ
50…軸箱(軸受部)
6…保加熱炉
6a…搬送ローラ(炉内ローラ)
6b…駆動モータ
11…制御部
12…衝撃予測用データ採集部
20…搬送装置
X…スラブ(被工作物)
Y…金属板(被工作物)
212…衝撃予測用データ採集部
212a…撮像装置
図1は、本発明の一実施形態である搬送装置20及びこれを備える熱間圧延装置1の概略構成及び機能構成を示す図である。
この図に示すように本実施形態の熱間圧延装置1は、加熱炉2、前面テーブル3、粗圧延機4、後面テーブル5、保加熱炉6、シャーリングマシン7、仕上圧延機8、冷却装置9、巻取機10、制御部11及び衝撃予測用データ採集部12を備えている。
この前面テーブル3は、加熱炉2から搬出されたスラブXを粗圧延機4に搬送すると共に、後述する粗圧延機4にてスラブXが往復されて繰り返し圧延される際に、スラブXを下方から支持するものである。
後面テーブル5は、ライン方向に配列された複数の搬送ローラ5a、軸箱50,51、駆動軸52、モータ53及び歯車箱54を備えており、粗圧延機4から搬出される金属板Yを保加熱炉6に搬送すると共に、粗圧延機4にてスラブXが往復された繰り返し圧延される際に、スラブXを下方から支持するものである。
なお、ここで言う最終往復移動とは、粗圧延機4から仕上圧延機8に最後にスラブXが送られる前の往復移動(最終パスの前のパス)のことを言う。即ち、最終往復移動における粗圧延機4からスラブXが突出する長さとは、粗圧延機4から仕上圧延機8に最後にスラブXが送られる前(最終パスの前のパス)において、粗圧延機4から突出されるスラブXの長さである。
このため、粗圧延機4におけるスラブXの圧延処理において、スラブXの先端が保加熱炉6に到達されることはなく、粗圧延機4におけるスラブXの圧延処理期間にて、スラブXが保加熱炉6の内部雰囲気に晒されることがない。
この保加熱炉6は、粗圧延機4から搬出される金属板Yの全長に近い長さ(例えば60~70m)で、金属板Yを曲げることなく保温することが可能となっている。
搬送ローラ6aは、駆動モータ6bの駆動力により回転駆動される。また、本熱間圧延装置1においては、保加熱炉6内での金属板Yの搬送速度は、金属板Yのうねりや反りが少ないとき300m/分程度であり、うねりや反りが多いときには最も遅くて100m/分程度である。
上記搬送ローラ6aは、1100℃でも所定の強度を保つ耐熱鋼製である。
仕上圧延機8は、複数の圧延ローラ8aによって構成される圧延機81がラインに沿って複数配列されることによって構成されており、保加熱炉6から搬出された金属板Yをさらに圧延処理することによって形状を整えるものである。
巻取機10は、冷却装置9の後段に設置されており、冷却装置9によって冷却された金属板Yを巻き取るものである。
データ処理器111は、衝撃予測用データ採集部12から入力されるデータによって、搬送ローラ6aの回転速度を決定し、駆動モータ6bを制御する。データ格納器112は、データ処理器111を介して、衝撃予測用データ採集部12から入力されるデータを格納する。
衝撃予測用データ採集部12は、図2に示すように、軸箱50、板検知用HMD(Hot Metal Detector)121及び速度検出器122からなる。
環状部501は、搬送ローラ5aの端部を把持する環状の部分である。
台座部502は、環状部501の下部から軸の幅方向へ延出した略台形の形状であって、環状部501を支える部分である。この台座部502は、下面に凹部502aが形成されることにより、肉薄に形成されている。
そして、台座部502は、凹部502aの中央部に貼付された歪ゲージ502cと、凹部502a内の歪ゲージ502cと重ならない位置に配された加速度計502dとを備えている。
歪ゲージ502cは、凹部502aの中央部に生じる歪に応じた信号を、データ処理器111に出力する。加速度計502dは、測定値をデータ処理器111に出力する。
速度検出器122は、歯車箱54に取り付けられており、駆動軸の回転速度を検知してデータ処理器111に出力するものである。データ処理器111は、速度検出器122から入力される駆動軸の回転速度に基づいて、金属板Yの搬送速度を算出する。
粗圧延機4に供給されたスラブXは、粗圧延機4にて複数回(例えば3回)往復移動され、繰り返し圧延されることによって金属板Yに成形される。
ここで、本熱間圧延装置1では、粗圧延機4にてスラブXが圧延処理されている間、スラブXは、前面テーブル3あるいは後面テーブル5によって下方から支持されると共に、スラブXの進行方向に対して左右に移動可能とされている。
保加熱炉6から搬出された金属板Yは、シャーリングマシン7にて先端部が切断された後、仕上圧延機8によってさらに圧延処理されて所望の厚さとされる。
そして、仕上圧延機8によって圧延処理された金属板Yは、冷却装置9にて冷却処理された後、巻取機10にて巻き取られる。
具体的には、板検知用HMD121が金属板Yを検知し、データ処理器111に信号を出力すると、データ処理器111は、歪ゲージ502cから入力される信号により、台座部502に生じている歪を算出すると共に、加速度計502dから入力される信号により、台座部502に生じている振動を算出する。そして、データ処理器111は、上記歪及び振動から、金属板Yが搬送ローラ5aに与えている衝撃の大きさを算出し、該算出値を、搬送ローラ6aに金属板Yが与える衝撃の大きさの予測値とする。
そして、データ処理器111は、駆動モータ6bを制御することにより、保加熱炉6内での金属板Yの搬送速度を調節し、これと共に、速度検出器122から入力される回転速度から算出される搬送速度が上記適正値に近づくように、モータ53を制御する。
したがって、保加熱炉6の内部温度を高温化して、仮に搬送ローラ6aの強度が従来の設定温度の場合よりも弱くなったとしても、搬送ローラ6aの強度が耐え得る衝撃の大きさを把握し、それ以上の衝撃が加わることのないように搬送速度を調節することにより、適切に搬送速度を高速化できる。
よって、熱間圧延の特に粗圧延後から仕上圧延前までにおいて、処理温度を高温化し、搬送速度を適切に高速化することにより、熱間圧延を全体的には高温・高速化しつつも、炉内ローラの破損を防ぐことができる。
この変形例における衝撃予測用データ採集部212は、上記実施形態の衝撃予測用データ採集部12が備える軸箱50及び板検知用HMD121に代えて、撮像装置212aを備えている。また、衝撃予測用データ採集部212は、撮像装置212aの他に、上記実施形態の衝撃予測用データ採集部12が備えるものと同様の速度検出器122を備えている。
そして、この変形例における上記実施形態との差異は以上であって、その他の部分は上記実施形態と同様である。
データ処理器111は、撮像装置212aから入力された映像に基づいて、金属板Yのうねりや反り、振動状態を分析し、該分析結果に基づいて、保加熱炉6内での金属板Yの搬送速度の適正値を決定する。
このような構成によれば、上記実施形態と同様の効果を得ることができる。
Claims (12)
- 所定間隔で並列に支持された複数本の搬送ローラを有し、該搬送ローラによって、圧延機から保加熱炉内へと被工作物を搬送する搬送装置であって、
前記搬送ローラのうち該保加熱炉内のものである炉内ローラに前記被工作物が与える衝撃の大きさを予測するためのデータを、前記保加熱炉の上流で取得する衝撃予測用データ採集部と、
前記衝撃予測用データ採集部が取得した前記データから衝撃の大きさを予測し、該衝撃の大きさに応じて、前記保加熱炉内での前記被工作物の搬送速度を調節する制御部と、を備えることを特徴とする搬送装置。 - 前記衝撃予測用データ採集部は、前記搬送ローラのうちの少なくとも1本を支持する軸受部に設けられて、該軸受部の変形及び振動の少なくともいずれか一つに関するデータ前記データとして取得することを特徴とする請求項1に記載の搬送装置。
- 前記衝撃予測用データ採集部は、撮像装置を有し、該撮像装置によって、前記保加熱炉の上流を搬送される前記被工作物を撮影した映像を、前記データとして取得することを特徴とする請求項1に記載の搬送装置。
- 前記保加熱炉は、1000℃以上の温度で前記被工作物を保加熱することを特徴とする請求項1から3のいずれかに記載の搬送装置。
- 前記炉内ローラによる前記被工作物の最高搬送速度は、200m/分以上であることを特徴とする請求項1に記載の搬送装置。
- 加熱炉にて加熱された被工作物を、粗圧延機で圧延し、保加熱炉にて温度調節しつつ仕上圧延機に搬送し、該仕上圧延機によって圧延する熱間圧延装置であって、
請求項1に記載の搬送装置を備えることを特徴とする熱間圧延装置。 - 所定間隔で並列に支持された複数本の搬送ローラ上を移動させることにより、圧延機から保加熱炉へと被工作物を搬送する搬送方法であって、
前記保加熱炉の上流で、該保加熱炉内の前記搬送ローラである炉内ローラに前記被工作物が与える衝撃の大きさを予測し、当該予測した衝撃の大きさに応じて、前記保加熱炉内での前記被工作物の搬送速度を調節することを特徴とする搬送方法。 - 前記衝撃の予測は、前記搬送ローラのうち少なくとも1本を支持する軸受部の変形及び振動の少なくともいずれか一つに基づいて行うことを特徴とする請求項7に記載の搬送方法。
- 前記衝撃の予測は、前記保加熱炉の上流を搬送される前記被工作物を撮影した撮影映像に基づいて行うことを特徴とする請求項7に記載の搬送方法。
- 前記保加熱炉は、1000℃以上の温度で前記被工作物を保加熱することを特徴とする請求項7に記載の搬送方法。
- 前記炉内ローラによる前記被工作物の最高搬送速度は、200m/分以上であることを特徴とする請求項7に記載の搬送方法。
- 被工作物を熱間圧延する熱間圧延方法であって、
請求項7に記載の搬送方法により前記被工作物を搬送することを特徴とする熱間圧延方法。
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US8662289B2 (en) * | 2012-06-26 | 2014-03-04 | Shenzhen China Star Optoelectronics Technlogy co., Ltd. | Glass substrate transmission device and method for detecting the rotational synchronization of driven shafts |
CN103331302B (zh) * | 2013-07-12 | 2015-07-15 | 山西太钢不锈钢股份有限公司 | 一种提高取向硅钢终轧温度的装置及其方法 |
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CN110411223B (zh) * | 2019-07-10 | 2020-12-29 | 东南大学 | 一种可调节炉辊支撑装置 |
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CN113369303B (zh) * | 2021-06-09 | 2022-07-19 | 燕山大学 | 一种用于复合板自动化真空涂覆及热轧的***及其方法 |
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