WO2021181540A1 - Système de fabrication de tuyau en acier - Google Patents

Système de fabrication de tuyau en acier Download PDF

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Publication number
WO2021181540A1
WO2021181540A1 PCT/JP2020/010376 JP2020010376W WO2021181540A1 WO 2021181540 A1 WO2021181540 A1 WO 2021181540A1 JP 2020010376 W JP2020010376 W JP 2020010376W WO 2021181540 A1 WO2021181540 A1 WO 2021181540A1
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WO
WIPO (PCT)
Prior art keywords
plating
film thickness
outer shape
thickness
coating film
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PCT/JP2020/010376
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English (en)
Japanese (ja)
Inventor
忠義 玉村
慎市郎 中村
睦 谷本
充志 山田
Original Assignee
大和鋼管工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 大和鋼管工業株式会社 filed Critical 大和鋼管工業株式会社
Priority to JP2022507062A priority Critical patent/JPWO2021181540A1/ja
Priority to PCT/JP2020/010376 priority patent/WO2021181540A1/fr
Publication of WO2021181540A1 publication Critical patent/WO2021181540A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • 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
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • 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
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/09—Making tubes with welded or soldered seams of coated strip material ; Making multi-wall tubes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures

Definitions

  • Patent Document 1 It is known to measure the thickness of the plating layer in the manufacturing process of steel sheets and the like (see, for example, Patent Document 1).
  • the conventional method of measuring the thickness of a steel sheet in the manufacturing process was to measure it in one form such as a plate shape. However, it was not possible to measure the dimensions while changing to various forms such as plate-shaped and tubular.
  • the present invention has been made in view of the above points, and an object of the present invention is to manufacture a steel pipe capable of obtaining dimensions in each form within a manufacturing process in which the form is continuously changed to a plate shape or a tubular shape. To provide the system.
  • the features of the steel pipe manufacturing system according to the present invention are From a plate-shaped steel plate having a first surface and a second surface facing the first surface, a tubular body having the first surface as an inner surface and the second surface as an outer surface is continuously formed. Molding equipment and molding equipment A molding measuring unit for measuring at least one of the thickness of the steel plate and the outer shape of the tubular body is provided.
  • test data were only obtained intermittently (discontinuously) with respect to the products manufactured continuously, and did not continuously indicate the entire product.
  • parameters required for manufacturing such as plating film thickness, coating film thickness, and outer shape must be changed according to various manufacturing conditions. The values of these parameters cannot be obtained in real time in the destructive test.
  • a plate-shaped steel plate having a first surface (for example, a first surface FF described later) and a second surface facing the first surface (for example, a second surface SF described later).
  • a molding apparatus for example, a forming apparatus 342 that continuously forms a tubular body (for example, a tubular body PB or the like) having the first surface as an inner surface and the second surface as an outer surface from a steel plate SS or the like.
  • a molding measuring unit for example, an inner surface plating pre-plating thickness measuring device
  • measures at least one of the thickness of the steel plate and the outer shape of the tubular body for example, parameters that characterize the shape of the tubular body such as diameter and roundness.
  • a steel pipe manufacturing system including 110, a plate thickness measuring device 120 after the inner surface plating treatment, an outer shape measuring device 130 before the outer surface plating treatment, an outer shape measuring device 140 after the outer surface plating treatment, and the like) is provided.
  • Non-destructive test equipment such as a steel plate thickness measuring device and a tubular body outer shape measuring device can be incorporated into a continuous molten metal plated steel pipe manufacturing facility. It is possible to save the equipment, place, people, time, and cost required for measurement.
  • non-destructive test equipment can be incorporated into the manufacturing equipment for continuous molten metal plated steel pipes, it is possible to omit the preparation of test pieces and improve the yield. Furthermore, the equipment, place, people, and time required for the destructive test can be saved.
  • the second embodiment is the first embodiment.
  • the molding measuring unit has a plate thickness measuring unit for measuring the plate thickness of the steel plate.
  • the thickness of the steel sheet can be measured on the spot without sampling. With this configuration, it is possible to provide a manufacturing process monitoring system with improved speed and real-time performance.
  • the third embodiment is the first or second embodiment.
  • the molding measuring unit has an outer shape measuring unit that measures the outer shape of the tubular body.
  • the outer shape of the tubular body can be measured on the spot without sampling. With this configuration, it is possible to provide a manufacturing process monitoring system with improved speed and real-time performance.
  • the fourth embodiment is the first to third embodiment.
  • a plating processing unit for example, an inner surface plating apparatus 320, an outer surface plating apparatus 420, etc.
  • Plating processing measuring unit for example, inner surface plating processing pre-plate thickness measuring device 110, inner surface plating processing
  • the plating step It further includes a plating film thickness discriminating unit (for example, a control / determination unit 200, etc.) for discriminating the plating film thickness.
  • a plating film thickness discriminating unit for example, a control / determination unit 200, etc.
  • Measurement results of plating and coating uniformity, film thickness and outer shape can be obtained continuously and without delay.
  • the measurement result is quickly reflected on the plating film, coating film, etc., and the accuracy is improved. Higher steel pipes can be manufactured.
  • the fifth embodiment is the fourth embodiment.
  • the plating processing unit has a first plating apparatus (for example, an inner surface plating apparatus 320) for plating the first surface of the steel sheet.
  • the plating processing measuring unit is A first plate thickness measuring device (for example, an inner surface plating pre-plating thickness measuring device 110) for measuring the plate thickness of the steel plate before the first plating step by the first plating apparatus, and A second plate thickness measuring device (for example, a plate thickness measuring device 120 after the inner surface plating treatment) for measuring the plate thickness of the steel plate after the first plating step by the first plating apparatus, and A first plating film thickness determining unit that determines the plating film thickness of the first plating step from the difference between the plate thickness before the first plating step and the plate thickness after the first plating step (for example, control Judgment unit 200, etc.) and.
  • the sixth embodiment is the fourth embodiment or the fifth embodiment.
  • the plating processing unit further includes a second plating apparatus (for example, an outer surface plating apparatus 420) for plating the outer surface of the tubular body.
  • the plating processing measuring unit is A first plate thickness measuring device (for example, an outer shape measuring device 130 before the outer surface plating process) for measuring the outer shape of the tubular body before the second plating step by the second plating device, and It has a second plate thickness measuring device (for example, an outer shape measuring device 140 after an outer surface plating process) for measuring the outer shape of the tubular body after the second plating step by the second plating device.
  • a second plating film thickness determination unit (for example, a control / judgment unit) that determines the plating film thickness of the second plating step from the difference between the outer shape before the second plating step and the outer shape after the second plating step. 200 etc.) and further.
  • the seventh embodiment is the fifth embodiment.
  • a first film thickness adjusting device for example, a first wiping unit 332 or the like
  • a first film thickness control device for example, a control / determination unit 200 that controls the first film thickness adjusting device based on the determination result of the first plating film thickness determination unit is further provided.
  • the eighth embodiment is the sixth embodiment.
  • a second film thickness adjusting device for example, a second wiping unit 432 or the like
  • a second film thickness control device for example, a control / determination unit 200 that controls the second film thickness adjusting device based on the determination result of the second plating film thickness determination unit is further provided.
  • the ninth embodiment is the embodiment of the first to eighth embodiments.
  • a coating device for forming a coating film on the outer surface for example, a top coating device 520
  • a coating film outer shape measuring unit for example, a pre-coating treatment outer shape measuring device 150 and a post-coating treatment outer shape measuring device 160
  • a coating film thickness determining unit for example, a control / determination unit 200
  • determining the film thickness of the coating film from the difference between the outer shape before the coating film and the outer shape after the coating film is further provided.
  • the tenth embodiment is the ninth embodiment.
  • a coating film thickness adjusting device for example, a third wiping unit 532 or the like for adjusting the film thickness of the coating film in the coating film step
  • a coating film thickness control device for example, a control / determination unit 200 that controls the coating film thickness adjusting device based on the determination result of the coating film thickness determination unit.
  • ⁇ Eleventh embodiment From a plate-shaped steel plate having a first surface and a second surface facing the first surface, a tubular body having the first surface as an inner surface and the second surface as an outer surface is continuously formed. Molding equipment and molding equipment A plating-treated portion for plating at least one surface of the first surface of the steel plate and the outer surface of the tubular body. A plating processing measuring unit that measures at least one of the thickness of the steel plate and the outer shape of the tubular body before and after the plating process by the plating processing unit.
  • the plating step It is provided with a plating film thickness discriminating unit for discriminating the plating film thickness.
  • the twelfth embodiment is the eleventh embodiment.
  • the plating processing unit has a first plating apparatus for plating the first surface of the steel sheet.
  • the plating processing measuring unit is A first plate thickness measuring apparatus for measuring the plate thickness of the steel plate before the first plating step by the first plating apparatus, and a first plate thickness measuring apparatus.
  • a second plate thickness measuring apparatus for measuring the plate thickness of the steel sheet after the first plating step by the first plating apparatus, and a second plate thickness measuring apparatus. It has a first plating film thickness determining unit that determines the plating film thickness of the first plating step from the difference between the plate thickness before the first plating step and the plate thickness after the first plating step.
  • the thirteenth embodiment is the eleventh embodiment or the twelfth embodiment.
  • the plating processing unit further includes a second plating apparatus for plating the outer surface of the tubular body.
  • the plating processing measuring unit is A first plate thickness measuring device for measuring the outer shape of the tubular body before the second plating step by the second plating device, and a first plate thickness measuring device. It has a second plate thickness measuring device for measuring the outer shape of the tubular body after the second plating step by the second plating device. Further, it has a second plating film thickness determining unit that determines the plating film thickness of the second plating step from the difference between the outer shape before the second plating step and the outer shape after the second plating step.
  • the fourteenth embodiment is the twelfth embodiment.
  • a first film thickness adjusting device for adjusting the plating film thickness in the first plating step A first film thickness control device that controls the first film thickness adjusting device based on the determination result of the first plating film thickness determination unit is further provided.
  • the fifteenth embodiment is the thirteenth embodiment.
  • a second film thickness adjusting device for adjusting the plating film thickness in the second plating step, and A second film thickness control device that controls the second film thickness adjusting device based on the determination result of the second plating film thickness determination unit is further provided.
  • the sixteenth embodiment is the eleventh embodiment to the fifteenth embodiment.
  • a coating device that forms a coating film on the outer surface
  • a coating film outer shape measuring unit that measures the outer shape of the tubular body before and after the coating film process by the coating film apparatus
  • a coating film thickness determining unit that determines the film thickness of the coating film from the difference between the outer shape before the coating film and the outer shape after the coating film.
  • the seventeenth embodiment is the sixth embodiment.
  • a coating film thickness adjusting device for adjusting the coating film thickness in the coating film step Further provided is a coating film thickness control device that controls the coating film thickness adjusting device based on the determination result of the coating film thickness determining unit.
  • ⁇ 18th embodiment From a plate-shaped steel plate having a first surface and a second surface facing the first surface, a tubular body having the first surface as an inner surface and the second surface as an outer surface is continuously formed. Molding equipment and molding equipment A coating device that forms a coating film on the outer surface, A coating film outer shape measuring unit that measures the outer shape of the tubular body before and after the coating film process by the coating film apparatus, It is provided with a coating film thickness determining unit that determines the film thickness of the coating film from the difference between the outer shape before the coating film and the outer shape after the coating film.
  • the nineteenth embodiment is the eighteenth embodiment of the embodiment.
  • a coating film thickness adjusting device for adjusting the coating film thickness in the coating film step Further provided is a coating film thickness control device that controls the coating film thickness adjusting device based on the determination result of the coating film thickness determining unit.
  • the twentieth embodiment is
  • the steel sheet is conveyed at one transfer speed, and the steel sheet is conveyed.
  • the steel plate and the tubular body are conveyed at the same transfer speed as the one transfer speed while being integrated with the steel plate passing through the first plating apparatus.
  • the conveying device that conveys the tubular body at the same conveying speed as the one conveying speed while maintaining the integralness with the steel plate and the tubular body passing through the forming apparatus. , Further prepare.
  • the 21st embodiment is The plate thickness measuring unit measures the plate thickness of the steel plate while the steel plate is transported by the transport device at the same transport speed as the one transport speed.
  • the 22nd embodiment is The outer shape measuring unit measures the outer shape of the tubular body while the tubular body is conveyed by the transfer device at the same transfer speed as the one transfer speed.
  • the 23rd embodiment is The coating device coats the outer surface of the tubular body while maintaining the integral body with the tubular body and transporting the tubular body at the same transport speed as the one transport speed by the transport device.
  • the 24th embodiment is The coating film outer shape measuring unit measures the outer shape of the tubular body while the tubular body is conveyed by the transfer device at the same transfer speed as the one transfer speed.
  • FIG. 1 is a schematic view showing the configuration of the steel pipe manufacturing system 10.
  • the steel pipe manufacturing system 10 includes a measuring device 100, a control / determination unit 200, and a manufacturing device 300.
  • the measuring device 100 includes a device for measuring the thickness of the steel plate SS and a device for measuring the outer shape of the tubular body PB (see FIG. 3 described later).
  • the control / determination unit 200 controls the manufacturing apparatus 300 based on the plate thickness and the outer shape measured by the measuring apparatus 100.
  • the manufacturing apparatus 300 is an apparatus for manufacturing a tubular body PB from a steel plate SS (see FIGS. 2 and 10 described later).
  • FIG. 2 is a diagram showing a manufacturing apparatus 300 for manufacturing a tubular body PB from a steel plate SS and a process of manufacturing a tubular body PB using the manufacturing apparatus 300.
  • a steel plate SS (steel strip) having a long strip shape prewound in a coil (not shown) is sent out, and is continuously formed into a tubular shape to be tubular.
  • Body PB can be manufactured. That is, the manufacturing process is a step of transforming the form of the flat steel plate SS into the form of the tubular tubular body PB.
  • the steel plate SS When the steel plate SS is sent out from the coil, it is formed into a flat shape.
  • the steel plate SS has a first surface FF having a flat shape and a second surface SF having a flat shape facing the first surface FF.
  • the first surface FF When formed into a tubular body PB, the first surface FF becomes the inner surface IF of the tubular body PB, and the second surface SF becomes the outer surface OF of the tubular body PB.
  • the first surface FF may be referred to as an inner surface IF for convenience of explanation.
  • the direction along the length of the steel plate SS or the tubular body PB having a long shape is referred to as a longitudinal direction LD.
  • the direction along the width of the steel plate SS and the radius (diameter) of the tubular body PB is referred to as the width direction WD.
  • the width direction WD is a direction perpendicular to the longitudinal direction LD.
  • the direction parallel to the normal direction of the first surface FF of the steel plate SS is referred to as a perspective direction PD.
  • the perspective PD is also in the direction perpendicular to the longitudinal LD.
  • the manufacturing process includes a pretreatment device 310, a first cleaning device 312, a first heating device 314, an inner surface plating device 320, a first film thickness adjusting device 330, a first cooling device 340, and a forming device 342.
  • Welding device 350 bead cutting device 352, second cleaning device 412, second heating device 414, outer surface plating device 420, second film thickness adjusting device 430, second cooling device 440, sizing device 442, top coat device 520,
  • a third film thickness adjusting device 530, a drying device 550, and a cutting device 560 are included.
  • Pretreatment device 310 applies surface treatment to both the first surface FF and the second surface SF of the steel sheet SS to peel off the oxide film layer.
  • First cleaning device 312 cleans the first surface FF of the steel sheet SS with a liquid such as acid or water.
  • Liquids include flux liquids for cleaning and antioxidants.
  • First heating device 314 has a heater (not shown), dries the first surface FF of the steel sheet SS, and heats the steel sheet SS.
  • the first heating temperature of the first heating device 314 affects the quality of the plating layer of the first surface FF and the like.
  • the first heating temperature is a control parameter of the heat treatment.
  • Inner surface plating device 320 pours a desired molten metal onto the first surface FF of the steel sheet SS.
  • the first surface FF is plated by exposing the first surface FF of the steel sheet SS to molten metal.
  • the plating apparatus has a first molten metal pump 322 and a first pouring portion 324 (see FIG. 4).
  • the first molten metal pump 322 supplies the molten metal to the first pouring portion 324.
  • the first pouring portion 324 pours the molten metal supplied from the first molten metal pump 322 onto the first surface FF of the steel plate SS.
  • the temperature of the molten metal affects the plating film thickness of the first surface FF and the like.
  • the temperature of the molten metal is a control parameter of the inner surface plating apparatus 320.
  • the position of the first pouring portion 324 can also be a control parameter of the inner surface plating apparatus 320.
  • the position of the LD in the longitudinal direction of the first pouring portion 324 can be adjusted by providing a driving device (not shown) including a motor, a solenoid, or the like as in the case of the first movable portion 334 described later.
  • First film thickness adjusting device 330 wipes the gas onto the first surface FF of the steel sheet SS after the plating treatment.
  • the first film thickness adjusting device 330 has a first wiping portion 332 and a first movable portion 334.
  • the first wiping portion 332 removes excess of the molten metal poured on the first surface FF by the first pouring portion 324.
  • the first wiping unit 332 blows an inert gas or a gas such as an air wiper onto the first surface FF of the steel sheet SS (arrows AR in FIGS. 4 and 5) to remove excess molten metal.
  • the first movable portion 334 includes three drive devices 336a, a drive device 336b, and a drive device 336c, which are composed of a motor, a solenoid, and the like (not shown).
  • the drive device 336a, the drive device 336b, and the drive device 336c are movably connected to the first wiping unit 332.
  • the drive device 336a drives the first wiping unit 332 so as to be reciprocally movable in the longitudinal direction LD. By driving the drive device 336a, the distance from the first pouring portion 324 to the first wiping portion 332 can be adjusted.
  • the drive device 336b drives the first wiping unit 332 so as to be movable in the perspective direction PD. By driving the drive device 336b, the distance from the first wiping portion 332 to the steel plate SS can be adjusted (see FIG. 5).
  • the drive device 336c rotatably drives the first wiping portion 332 clockwise or counterclockwise with respect to the steel plate SS.
  • the inclination (angle) of the wiping portion with respect to the first surface FF of the steel plate SS can be adjusted (see FIG. 5).
  • the distribution of the inner surface plating film thickness and the inner surface plating film thickness is the distance from the first pouring portion 324 to the first wiping portion 332, the distance from the first wiping portion 332 to the steel plate SS, and the first surface of the steel plate SS. It is determined by the inclination of the wiping part with respect to FF.
  • the distance from the first pouring portion 324 to the first wiping portion 332, the distance from the first wiping portion 332 to the steel plate SS, and the inclination of the wiping portion with respect to the first surface FF of the steel plate SS are controlled by the inner surface plating process. It is a parameter.
  • the flow rate of the gas discharged from the first wiping portion 332 and wiped on the first surface FF of the steel sheet SS and the distribution of the flow rate also affect the inner surface plating film thickness.
  • the nozzle of the first wiping unit 332 can be provided with a mechanism (not shown) capable of adjusting the flow rate and the distribution of the flow rate of the gas discharged from the first wiping unit 332.
  • the flow rate and the distribution of the flow rate of the gas discharged from the first wiping unit 332 are control parameters of the inner surface plating process.
  • the first wiping unit 332 may be fixed at a fixed position or angle. By making it constant, it is less likely to be affected by vibration or the like, the posture of the first wiping portion 332 can be stabilized, and excess molten metal can be accurately removed.
  • First cooling device 340 cools the steel sheet SS after hot-dip plating.
  • the forming device 342 includes a roll forming device (not shown) and the like.
  • the forming device 342 continuously deforms the steel plate SS into a tubular shape to form a tubular body PB. By this treatment, the form can be changed from the steel plate SS to a tubular shape.
  • cold forming, warm forming, hot forming and the like can be appropriately selected depending on the material of the steel plate SS, the material of the plating and the like.
  • the steel plate SS is continuously formed from the steel plate SS into the tubular body PB while maintaining an integrated state. That is, the steel plate SS can be continuously processed into the tubular body PB without making the transfer speed of the steel plate SS different from the transfer speed of the tubular body PB.
  • the welding device 350 welds the two ends of the steel plates SS facing each other along the longitudinal LD to form a tubular body PB without gaps.
  • the bead cutting device 352 has a cutting tool (not shown), and continuously cuts the weld bead portion formed by the welding process with the cutting tool. By the cutting process, the outer surface OF of the tubular body PB can be smoothly formed.
  • Second cleaning device 412 cleans the outer surface OF of the tubular body PB with a liquid such as acid or water.
  • Liquids include flux liquids for cleaning and antioxidants.
  • Second heating device 414 has a heater (not shown), dries the outer surface OF of the tubular body PB, and heats the tubular body PB.
  • the second heating temperature of the second heating device 414 affects the quality of the plating layer of the inner surface IF and the like.
  • the second heating temperature is a control parameter of the heat treatment.
  • the outer surface plating apparatus 420 continuously performs hot metal plating on the outer surface OF of the tubular body PB to form a hot metal plated steel pipe.
  • the outer surface plating apparatus 420 has a second molten metal pump 422 and a dipping portion 426 (see FIG. 6).
  • the second molten metal pump 422 supplies the molten metal to the immersion portion 426.
  • the dipping portion 426 stores the supplied molten metal, and the outer surface OF is subjected to the molten metal plating treatment by passing the tubular body PB through the dipping portion 426.
  • the temperature of the molten metal affects the plating film thickness of the outer surface OF.
  • the temperature of the molten metal is a control parameter of the outer surface plating apparatus 420.
  • a plurality of immersion portions 426 can be provided as the outer surface plating apparatus 420.
  • the immersion time and the like can be adjusted depending on the number of the immersion portions 426 to be operated.
  • the number of immersion portions 426 to be operated can be changed according to the type of molten metal and the like. In this way, the number of dipping portions 426 to be operated can also be a control parameter of the outer surface plating apparatus 420.
  • the position of the dipping portion 426 closest to the second wiping portion 432 can also be used as a control parameter of the outer surface plating apparatus 420.
  • the distance between the dipping portion 426 closest to the second wiping portion 432 and the second wiping portion 432 can be adjusted.
  • the position of the LD in the longitudinal direction of the immersion portion 426 can be adjusted by providing the immersion portion 426 with a drive device (not shown) including a motor, a solenoid, or the like as in the first movable portion 334.
  • Second film thickness adjusting device 430 wipes the gas onto the outer surface OF of the tubular body PB after the plating treatment.
  • the second film thickness adjusting device 430 has a second wiping portion 432 and a second movable portion 434 (see FIG. 6).
  • the second wiping portion 432 removes excess molten metal adhering to the outer surface OF of the tubular body PB at the dipping portion 426.
  • the second wiping unit 432 blows an inert gas or a gas such as an air wiper onto the outer surface OF of the tubular body PB to remove excess molten metal.
  • the second wiping portion 432 has a through hole 438.
  • the tubular body PB can pass through the through hole 438 of the second wiping portion 432. As the tubular body PB passes through the through hole 438, a gas (arrow AR in FIG. 7) is wiped against the tubular body PB to remove excess molten metal.
  • the second movable portion 434 includes three drive devices 436a, a drive device 436b, and a drive device 436c, which are composed of a motor, a solenoid, and the like (not shown).
  • the drive device 436a, the drive device 436b, and the drive device 436c are movably connected to the second wiping unit 432.
  • the drive device 436a drives the second wiping unit 432 so as to be reciprocally movable in the longitudinal direction LD. By driving the drive device 436a, the distance from the immersion unit 426 to the second wiping unit 432 can be adjusted.
  • the drive device 436b drives the second wiping unit 432 so as to be reciprocally movable in the width direction WD.
  • the drive device 436c drives the second wiping unit 432 so as to be reciprocally movable in the perspective direction PD.
  • the distance in the width direction WD from the second wiping portion 432 to the outer circumference of the tubular body PB can be adjusted.
  • the distance of the perspective PD from the second wiping unit 432 to the outer circumference of the tubular body PB can be adjusted (see FIG. 7).
  • the center PO of the tubular body PB can be eccentric from the center WO of the through hole 438 of the second wiping unit 432.
  • the distribution of the outer surface plating film thickness and the outer surface plating film thickness includes the distance from the dipping portion 426 to the second wiping portion 432, the distance in the width direction WD from the second wiping portion 432 to the outer circumference of the tubular body PB, and the second wiping. It is determined by the distance of the perspective PD from the portion 432 to the outer circumference of the tubular body PB. The distance from the dipping portion 426 to the second wiping portion 432, the distance in the width direction WD from the second wiping portion 432 to the outer circumference of the tubular body PB, and the perspective PD from the second wiping portion 432 to the outer circumference of the tubular body PB. The distance is a control parameter for the outer surface plating process.
  • the flow rate of the gas discharged from the second wiping portion 432 and wiped on the outer surface OF of the tubular body PB and the distribution of the flow rate also affect the outer surface plating film thickness.
  • the nozzle of the second wiping unit 432 can be provided with a mechanism (not shown) capable of adjusting the flow rate and the distribution of the flow rate of the gas discharged from the second wiping unit 432.
  • the flow rate and the distribution of the flow rate of the gas discharged from the second wiping unit 432 are control parameters of the outer surface plating process.
  • the second wiping unit 432 may be fixed at a fixed position. By making it constant, it is less likely to be affected by vibration or the like, the posture of the second wiping portion 432 can be stabilized, and excess molten metal can be accurately removed.
  • Second cooling device 440 Cools the tubular body PB heated by the outer surface plating treatment.
  • ⁇ Sizing device 442 >> In the sizing device 442, the tubular body PB after the outer surface plating treatment is cold-rolled by a molding device (not shown) having a plurality of rollers to adjust the outer shape and bring the cross-sectional shape closer to a perfect circle. It is a process of molding to standard dimensions.
  • the top coat device 520 is a process of applying a resin to the outer surface OF of the tubular body PB. By applying the resin, the plating applied to the outer surface OF of the tubular body PB can be protected.
  • the position of the top coat device 520 can also be a control parameter of the top coat device 520.
  • the position of the LD in the longitudinal direction of the top coat device 520 can be adjusted by providing a drive device (not shown) including a motor, a solenoid, or the like as in the first movable portion 334 described above.
  • the third air blow device 530 wipes the gas on the outer surface OF of the tubular body PB after applying the resin.
  • the third air blow device 530 has a third wiping portion 532 and a third movable portion 534.
  • the dipping portion 426 of the outer surface plating apparatus 420 corresponds to the top coat apparatus 520
  • the third wiping portion 532 corresponds to the second wiping portion 432
  • the third movable portion 534 corresponds to the second movable portion 434.
  • the third wiping unit 532 has the same function as the second wiping unit 432.
  • the third wiping unit 532 removes excess resin applied by the top coat device 520.
  • the third wiping unit 532 blows an inert gas or a gas such as an air wiper onto the outer surface OF of the tubular body PB to remove excess resin.
  • the third wiping portion 532 has an annular shape and has a through hole 538.
  • the tubular body PB can pass through the through hole 538 of the third wiping portion 532. As the tubular PB passes through the through hole 538, the gas is wiped against the tubular PB to remove excess resin.
  • the third movable portion 534 includes three drive devices 536a, a drive device 536b, and a drive device 536c, which are composed of a motor, a solenoid, and the like (not shown).
  • the drive device 536a, the drive device 536b, and the drive device 536c are movably connected to the third wiping unit 532.
  • the drive device 536a drives the third wiping unit 532 so as to be reciprocally movable in the longitudinal direction LD. By driving the drive device 536a, the distance from the top coat device 520 to the third wiping unit 532 can be adjusted.
  • the drive device 536b drives the third wiping unit 532 so as to be reciprocally movable in the width direction WD.
  • the drive device 536c drives the third wiping unit 532 so as to be reciprocally movable in the perspective direction PD.
  • the distance in the width direction WD from the third wiping portion 532 to the outer circumference of the tubular body PB can be adjusted.
  • the distance of the perspective PD from the third wiping unit 532 to the outer circumference of the tubular body PB can be adjusted (see FIG. 7).
  • the center PO of the tubular body PB can be eccentric from the center WO of the through hole 538 of the third wiping unit 532.
  • the thickness of the resin layer and the distribution of the thickness of the resin layer are determined by the distance from the top coat device 520 to the third wiping portion 532, the distance in the width direction WD from the third wiping portion 532 to the outer circumference of the tubular body PB, and the like. It is determined by the distance of the perspective PD from the third wiping portion 532 to the outer circumference of the tubular body PB. The distance from the top coat device 520 to the third wiping portion 532, the distance in the width direction WD from the third wiping portion 532 to the outer circumference of the tubular body PB, and the perspective direction from the third wiping portion 532 to the outer circumference of the tubular body PB.
  • the PD distance is a control parameter for the film thickness of the resin.
  • the flow rate of the gas discharged from the third wiping portion 532 and wiped on the outer surface OF of the tubular body PB and the distribution of the flow rate also affect the film thickness of the resin.
  • the nozzle of the third wiping unit 532 can be provided with a mechanism (not shown) capable of adjusting the flow rate and the distribution of the flow rate of the gas discharged from the third wiping unit 532.
  • the flow rate of the gas discharged from the third wiping unit 532 and the distribution of the flow rate are control parameters for the film thickness of the resin.
  • the third wiping unit 532 may be fixed at a fixed position. By making it constant, it is less likely to be affected by vibration or the like, the posture of the third wiping portion 532 can be stabilized, and excess resin can be accurately removed.
  • Drying device 550 dries the resin applied to the outer surface OF of the tubular body PB.
  • the cutting device 560 is a process of cutting the tubular body PB to a predetermined length.
  • the steel plate SS is continuously formed from the steel plate SS into the tubular body PB while maintaining an integrated state. That is, the transport device 600 transports the steel plate SS and the tubular body PB at a constant transport speed TV.
  • the steel plate SS and the tubular body PB are continuously conveyed by the transfer device 600 in the steps from the pretreatment device 310 to the drying device 550 without stopping while maintaining the integrated state.
  • the steel plate SS and the tubular body PB are transported at a constant speed in all the steps of the process of changing the form from the steel plate SS to the tubular body PB (the transport speed of the steel plate SS and the transport speed of the tubular body PB are equal ().
  • Transport speed TV is also a control parameter that commonly controls the plating time for inner surface plating, the plating time for outer surface plating, and the resin application time.
  • FIG. 3 is a block diagram showing the configuration of the measuring device 100.
  • the measuring device 100 includes a plate thickness measuring device 110 before the inner surface plating treatment, a plate thickness measuring device 120 after the inner surface plating treatment, an outer shape measuring device 130 before the outer surface plating treatment, an outer shape measuring device 140 after the outer surface plating treatment, and before the coating treatment. It has an outer shape measuring device 150 and an outer shape measuring device 160 after coating treatment.
  • the inner surface plating treatment front plate thickness measuring device 110 is an apparatus for measuring the plate thickness of the steel plate SS before the inner surface plating treatment. Specifically, the thickness of the steel plate SS can be measured between the cleaning treatment by the first cleaning device 312 and the heat treatment by the first heating device 314 ((1-1) shown in FIG. 2). .. Further, the plate thickness of the steel plate SS can be measured between the heat treatment by the first heating device 314 and the plating treatment by the inner surface plating device 320 ((1-2) shown in FIG. 2).
  • the plate thickness measuring device 120 after the inner surface plating treatment is a device for measuring the plate thickness of the steel plate SS after the inner surface plating treatment. Specifically, the thickness of the steel sheet SS is measured between the gas blowing process by the first air blow device 330 and the cooling process by the first cooling device 340 ((2-1) shown in FIG. 2). be able to. Further, the thickness of the steel plate SS can be measured between the cooling process by the first cooling device 340 and the roll forming process by the forming device 342 ((2-2) shown in FIG. 2).
  • the plate thickness measuring device 110 before the inner surface plating treatment and the plate thickness measuring device 120 after the inner surface plating treatment measure the displacement of the steel plate SS by irradiating the steel plate SS with laser light and receiving the reflected light reflected from the steel plate SS. do.
  • the plate thickness measuring device 110 before the inner surface plating treatment and the plate thickness measuring device 120 after the inner surface plating treatment have sensor heads 112a and 112b (see FIG. 8) and a controller (not shown).
  • the sensor heads 112a and 112b are connected to the controller.
  • the sensor head 112a detects the displacement of the first surface FF of the steel plate SS.
  • the sensor head 112b detects the displacement of the second surface SF of the steel plate SS.
  • the sensor heads 112a and 112b are sensors that optically detect displacement.
  • the sensor heads 112a and 112b output a detection signal indicating the detected displacement.
  • the detection signal is supplied to the controller.
  • FIG. 8 is a perspective view showing a state in which the plate thickness of the steel plate SS is measured by the plate thickness measuring device 110 before the inner surface plating treatment or the plate thickness measuring device 120 after the inner surface plating treatment.
  • the sensor head 112a irradiates the first surface FF of the steel plate SS with laser light, receives the reflected light reflected from the first surface FF, and measures the displacement of the first surface FF of the steel plate SS.
  • the sensor head 112b irradiates the second surface SF of the steel plate SS with laser light, receives the reflected light reflected from the second surface SF, and measures the displacement of the second surface SF of the steel plate SS.
  • the signal indicating the displacement of the first surface FF of the steel plate SS and the signal indicating the displacement of the second surface SF of the steel plate SS are supplied to the control / determination unit 200 via a controller (not shown). ..
  • the sensor heads 112a and 112b are arranged concentrically.
  • the control / determination unit 200 can acquire the plate thickness of the steel plate SS from the displacement of the first surface FF detected by the sensor head 112a and the displacement of the second surface SF detected by the sensor head 112b.
  • the sensor heads 112a and 112b have a drive device (not shown).
  • the sensor heads 112a and 112b can be moved along the width direction WD by the driving device while maintaining the concentric state.
  • the sensor heads 112a and 112b can measure the plate thickness at an arbitrary position along the width direction WD of the steel plate SS.
  • the sensor heads 112a and 112b are constantly reciprocated by the driving device to measure the thickness of the steel plate SS.
  • the control / judgment unit 200 acquires the plate thickness of the steel plate SS before the inner surface plating treatment by the inner surface plating treatment front plate thickness measuring device 110. Similarly, the control / determination unit 200 acquires the plate thickness of the steel plate SS after the inner surface plating treatment by the plate thickness measuring device 120 after the inner surface plating treatment. The control / judgment unit 200 can obtain the thickness of the plating formed by the inner surface plating treatment from the thickness of the steel plate SS before the inner surface plating treatment and the plate thickness of the steel plate SS after the inner surface plating treatment. ..
  • the outer shape measuring device 130 before the outer surface plating treatment is a device for measuring the outer shape of the tubular body PB before the outer surface plating treatment (for example, parameters that characterize the shape of the tubular body PB such as diameter and roundness).
  • the outer shape of the tubular body PB can be measured between the cleaning treatment by the second cleaning device 412 and the heat treatment by the second heating device 414 ((3-1) shown in FIG. 2). .. Further, the outer shape of the tubular body PB can be measured between the heat treatment by the second heating device 414 and the plating treatment by the outer surface plating device 420 ((3-2) shown in FIG. 2).
  • the outer shape measuring device 140 after the outer surface plating treatment is a device for measuring the outer shape of the tubular body PB after the outer surface plating treatment (for example, parameters that characterize the shape of the tubular body PB such as diameter and roundness).
  • the outer shape of the tubular body PB is measured between the gas blowing process by the second air blow device 430 and the cooling process by the second cooling device 440 ((4-1) shown in FIG. 2). be able to.
  • the outer shape of the tubular body PB can be measured between the cooling process by the second cooling device 440 and the molding process by the sizing device 442 ((4-2) shown in FIG. 2).
  • the outer shape measuring device 130 before the outer surface plating treatment and the outer shape measuring device 140 after the outer surface plating treatment irradiate the tubular body PB with laser light and receive the reflected light reflected from the tubular body PB to obtain the outer shape of the tubular body PB. taking measurement.
  • FIG. 9 is a perspective view showing the configurations of the outer shape measuring device 130 before the outer surface plating treatment, the outer shape measuring device 140 after the outer surface plating treatment, the outer shape measuring device 150 before the coating treatment, and the outer shape measuring device 160 after the coating treatment.
  • the pre-coating outer shape measuring device 150 and the post-coating outer shape measuring device 160 have the same configurations as the outer surface plating pre-outer shape measuring device 130 and the outer surface plating post-outer shape measuring device 140.
  • the outer shape measuring device 130 before the outer surface plating treatment is installed in the transport path of the tubular body PB.
  • the outer shape measuring device 130 before the outer surface plating process has a center hole 131 in the axial direction.
  • the central hole 131 has a substantially circular shape.
  • the diameter of the central hole 131 is larger than the diameter of the tubular body PB.
  • the outer shape measuring device 130 before the outer surface plating process has a rotating body 132 and a base portion 133.
  • the base portion 133 is provided at a fixed position with respect to the transport path.
  • the rotating body 132 is arranged concentrically with the tubular body PB. During the transportation of the tubular body PB, the central axis of the tubular body PB may deviate from the central axis of the rotating body 132.
  • the rotating body 132 can rotate with respect to the base portion 133.
  • Three distance sensors 135a, 135b, 135c are provided on the rotating body 132 toward the central axis of the rotating body 132.
  • the three distance sensors 135a, 135b, and 135c are distance sensor units that use laser light.
  • the three distance sensors 135a, 135b, and 135c irradiate the laser beam toward the central axis of the rotating body 132, and receive the reflected light reflected from the tubular body PB arranged in the central hole 131 to receive the tubular body. Measure the distance to the PB.
  • the rotating body 132 has a gear 136 on the outer peripheral surface.
  • the base portion 133 has a motor 137 and a gear 138.
  • the gear 136 is fitted with the gear 138.
  • the rotational force of the motor 137 is transmitted to the gear 136 via the gear 138, and the rotating body 132 rotates.
  • the three distance sensors 135a, 135b, and 135c orbit the tubular body PB.
  • the three distance sensors 135a, 135b, and 135c measure the distance to the tubular body PB while orbiting the tubular body PB, and output a distance signal indicating the measured distance.
  • the output distance signal is supplied to the control / determination unit 200 via a controller (not shown).
  • the three distance sensors 135a, 135b, and 135c are constantly rotating and moving during measurement, and emit a distance signal by wireless communication.
  • wireless communication For example, Bluetooth (registered trademark) and short-range wireless communication such as infrared communication can be used.
  • a movable contact such as a brush may be used to form an electrical connection, and the distance signal may be output by wire.
  • the distance of the conveyed tubular body PB to the tubular body PB can be measured by the three rotating distance sensors 135a, 135b, 135c.
  • the control / judgment unit 200 acquires the outer shape of the tubular body PB before the outer surface plating process by the outer shape measuring device 130 before the outer surface plating process. Similarly, the control / determination unit 200 acquires the outer shape of the tubular body PB after the outer surface plating treatment by the outer shape measuring device 140 after the outer surface plating treatment. The control / judgment unit 200 can obtain the thickness of the plating formed by the outer surface plating treatment from the outer shape of the tubular body PB before the outer surface plating treatment and the outer shape of the tubular body PB after the outer surface plating treatment. ..
  • the pre-coating outer shape measuring device 150 is a device for measuring the outer shape of the tubular body PB before coating the resin (for example, parameters that characterize the shape of the tubular body PB such as diameter and roundness). Specifically, the outer shape of the tubular body PB can be measured between the molding process by the sizing device 442 and the resin coating process by the top coat device 520 ((5) shown in FIG. 2).
  • the post-coating outer shape measuring device 160 is a device for measuring the outer shape of the tubular PB after coating the resin (for example, parameters that characterize the shape of the tubular PB such as diameter and roundness). Specifically, the outer shape of the tubular body PB can be measured between the drying process by the drying device 550 and the cutting process by the cutting device 560 ((6) shown in FIG. 2).
  • the pre-coating outer shape measuring device 150 and the post-coating outer shape measuring device 160 have the same configurations as the outer surface plating pre-outer shape measuring device 130 and the outer surface plating post-outer shape measuring device 140.
  • the control / judgment unit 200 acquires the outer shape of the tubular body PB before applying the resin by the outer shape measuring device 150 before coating treatment.
  • the control / determination unit 200 acquires the outer shape of the tubular body PB after the resin is applied by the outer shape measuring device 160 after the coating process.
  • the control / determination unit 200 can obtain the thickness of the resin formed by the resin coating process from the outer shape of the tubular body PB before the resin is applied and the outer shape of the tubular body PB after the resin is applied.
  • FIG. 10 is a block diagram showing an outline of the configurations of the control / determination unit 200 and the control device.
  • the control / determination unit 200 includes a calculation unit 210, a storage unit 220, an input / output unit 230, and a display unit 240.
  • the calculation unit 210 includes a CPU (Central Processing Unit).
  • the storage unit 220 includes a ROM (read-only memory), a RAM (random access memory), an HDD (hard disk drive), and the like.
  • the storage unit 220 may be any as long as it can readablely store various programs and data.
  • the input / output unit 230 includes an I / O port, a communication interface, and the like.
  • the communication interface includes a wired communication interface in addition to wireless communication.
  • the display unit includes a liquid crystal display or the like.
  • FIG. 11 is a flowchart showing the film thickness control process.
  • the program is stored in the storage unit 220 of the control / judgment unit 200, and is called and executed by the calculation unit 210.
  • the steel pipe manufacturing system 10 has completed the start-up process such as initialization and is operating steadily.
  • the flowchart shown in FIG. 11 is repeatedly executed at predetermined timing intervals.
  • the calculation unit 210 of the control / judgment unit 200 receives the inner surface plating pre-plate thickness signal output from the inner surface plating pre-plate thickness measuring device 110, acquires the inner surface plating pre-plate thickness, and controls / determines. It is stored in the storage unit 220 of the unit 200 (step S1111).
  • the calculation unit 210 of the control / judgment unit 200 receives the plate thickness signal after the inner surface plating process output from the plate thickness measuring device 110 before the inner surface plating process, acquires the plate thickness after the inner surface plating process, and controls / determines. It is stored in the storage unit 220 of the unit 200 (step S1113).
  • the calculation unit 210 of the control / judgment unit 200 receives the external surface plating pre-processing external shape signal output from the inner surface plating pre-plating thickness measuring device 110, acquires the outer surface pre-plating external shape, and controls / determines the control / judgment unit 200. It is stored in the storage unit 220 of the above (step S1115).
  • the calculation unit 210 of the control / judgment unit 200 receives the outer shape signal after the outer surface plating process output from the plate thickness measuring device 110 before the inner surface plating process, acquires the outer shape after the outer surface plating process, and obtains the outer shape after the outer surface plating process. It is stored in the storage unit 220 of the above (step S1117).
  • the calculation unit 210 of the control / judgment unit 200 receives the external surface coating pre-processing external shape signal output from the inner surface plating pre-plate thickness measuring device 110, acquires the external surface coating pre-processing external shape, and controls / determines the control / judgment unit 200. It is stored in the storage unit 220 of the above (step S1119).
  • the calculation unit 210 of the control / judgment unit 200 receives the external signal after the outer surface coating process output from the plate thickness measuring device 110 before the inner surface plating process, acquires the outer shape after the outer surface coating process, and obtains the outer shape after the outer surface coating process. (Step S1121).
  • the above-mentioned inner surface plating pre-plate thickness signal, inner surface plating post-plate thickness signal, outer surface plating pre-external signal, outer surface plating post-external signal, outer surface coating pre-external signal, and outer surface coating post-external signal are all various.
  • the waveform is shaped in advance by signal processing such as the filtering process of the above, and the displacement of long wavelengths such as waviness and bending of the steel plate SS and the tubular body PB and the displacement of short wavelengths such as unevenness and scratches are removed.
  • These signals may be analog signals or digital signals. In the case of an analog signal, it may be converted into a digital signal in advance by an AD converter.
  • the calculation unit 210 of the control / judgment unit 200 calculates the position corresponding to the inner surface plating process (step S1123).
  • the position of the longitudinal LD of the steel sheet SS whose plate thickness was measured by the plate thickness measuring device 110 before the inner surface plating treatment and the position of the longitudinal LD of the steel plate SS whose plate thickness measuring device 120 measured the plate thickness after the inner surface plating treatment were determined. This is a process for associating.
  • the plate thickness measuring device 110 before the inner surface plating treatment and the plate thickness measuring device 120 after the inner surface plating treatment measure the plate thickness while reciprocating in the width direction WD. It is assumed that the measurement position of the plate thickness measuring device 110 before the inner surface plating treatment and the measurement position of the plate thickness measuring device 120 after the inner surface plating treatment cannot be matched. Therefore, instead of associating the positions, the area measured by the inner surface plating pre-plate thickness measuring device 110 over a certain length along the longitudinal LD and the inner surface plating post-plate thickness measuring device 120 are It may be associated with the region measured over a certain length along the longitudinal LD. By doing so, it is possible to obtain an average plate thickness over a certain length.
  • the calculation unit 210 of the control / judgment unit 200 calculates the position corresponding to the outer surface plating process (step S1125). In order to associate the position of the longitudinal LD of the steel sheet SS whose plate thickness was measured by the outer shape measuring device 130 before the outer surface plating process with the position of the longitudinal LD of the steel plate SS whose plate thickness was measured by the outer shape measuring device 140 after the outer surface plating treatment. It is the processing of.
  • the outer shape measuring device 130 before the outer surface plating treatment and the outer shape measuring device 140 after the outer surface plating treatment measure the outer shape while orbiting the tubular body PB. It is assumed that the measurement position of the outer shape measuring device 130 before the outer surface plating process and the measurement position of the outer shape measuring device 140 after the outer surface plating process cannot be matched. Therefore, instead of associating the positions, the region measured by the outer shape measuring device 130 before the outer surface plating treatment over a certain length along the longitudinal LD and the outer shape measuring device 140 after the outer surface plating treatment are in the longitudinal direction. It suffices to associate with the area measured over a certain length along the LD. By doing so, it is possible to obtain an average outer shape over a certain length.
  • the calculation unit 210 of the control / judgment unit 200 calculates the position corresponding to the outer surface coating process (step S1127). Processing for associating the position of the longitudinal LD of the steel sheet SS whose plate thickness was measured by the external shape measuring device 150 before the coating treatment with the position of the longitudinal LD of the steel plate SS whose plate thickness was measured by the external shape measuring device 160 after the coating treatment. Is.
  • RT1 pre-coating outer shape measuring device 150
  • RT2 post-coating outer shape measuring device 160
  • RT RT2-RT1
  • the outer shape measuring device 130 before the outer surface plating treatment can be replaced with the outer shape measuring device 150 before the coating treatment
  • the outer shape measuring device 140 after the outer surface plating treatment is measured after the coating treatment. It is shown that it can be replaced with the device 160.
  • the pre-coating outer shape measuring device 150 and the post-coating outer shape measuring device 160 measure the outer shape while orbiting the tubular body PB. It is assumed that the measurement position of the external shape measuring device 150 before the coating process and the measurement position of the external shape measuring device 160 after the coating process cannot be matched. Therefore, instead of associating the positions, the region measured by the pre-coating outer shape measuring device 150 over a certain length along the longitudinal LD and the post-coating outer shape measuring device 160 are in the longitudinal LD. It suffices to associate with the area measured over a certain length along the line. By doing so, it is possible to obtain an average outer shape over a certain length.
  • the calculation unit 210 of the control / judgment unit 200 determines the thickness of the steel plate SS before the inner surface plating process and the thickness of the steel sheet SS after the inner surface plating process for the positions corresponding to the inner surface plating process associated with the process in step S1123.
  • the inner surface plating film thickness by the inner surface plating treatment is calculated from the difference from the plate thickness of the steel plate SS (step S1129).
  • the calculation unit 210 of the control / judgment unit 200 determines the outer shape of the tubular body PB before the outer surface plating process and the outer surface plating process after the outer surface plating process for the positions corresponding to the outer surface plating process associated with the process in step S1125.
  • the outer surface plating film thickness by the outer surface plating treatment is calculated from the difference from the outer shape of the tubular body PB (step S1131).
  • the calculation unit 210 of the control / judgment unit 200 determines the outer shape of the tubular body PB before the coating process and the outer shape of the tubular body PB after the coating process with respect to the positions corresponding to the outer surface coating process associated with the process of step S1127.
  • the resin film thickness by the coating treatment is calculated from the difference between the above (step S1133).
  • the calculation unit 210 of the control / determination unit 200 determines whether or not the inner surface plating film thickness, the outer surface plating film thickness, and the resin film thickness are included in the controllable range (step S1135).
  • the calculation unit 210 of the control / determination unit 200 determines in the determination process of step S1135 that the inner surface plating film thickness, the outer surface plating film thickness, and the resin film thickness are within the controllable range (YES)
  • the inner surface The control parameters are determined according to the values of the plating film thickness, the outer surface plating film thickness, and the resin film thickness (step S1137).
  • the control parameters related to the inner surface plating process are as follows.
  • the first heating temperature is a control parameter for the heat treatment of the first heating device 314.
  • the temperature of the molten metal is a control parameter of the inner surface plating apparatus 320.
  • the distance from the first pouring portion 324 to the first wiping portion 332, the distance from the first wiping portion 332 to the steel plate SS, and the inclination of the wiping portion with respect to the first surface FF of the steel plate SS are determined by the inner surface plating apparatus 320. This is a control parameter for the inner surface plating process.
  • the position of the first pouring portion 324 is also a control parameter.
  • the flow rate and the distribution of the flow rate of the gas discharged from the first wiping unit 332 are control parameters of the inner surface plating process.
  • the position of the first pouring portion 324 and the position of the first wiping portion 332 may be adjusted.
  • step S1137 when adjusting the inner surface plating film thickness, one of these control parameters is selected.
  • the control parameters related to the outer surface plating process are as follows.
  • the second heating temperature is a control parameter of the heat treatment.
  • the temperature of the molten metal is a control parameter of the outer surface plating apparatus 420.
  • the number of dipping portions 426 to be operated can also be a control parameter of the outer surface plating apparatus 420.
  • the distance is a control parameter for the outer surface plating process.
  • the flow rate and the distribution of the flow rate of the gas discharged from the second wiping unit 432 are control parameters of the outer surface plating process.
  • the position of the second wiping portion 432, the dipping portion 426 to be operated, and the position of the dipping portion 426 may be adjusted.
  • step S1137 when adjusting the outer surface plating film thickness, one of these control parameters is selected.
  • the control parameters related to the resin coating process are as follows.
  • the distance of PD is a control parameter of the resin layer.
  • the flow rate of the gas discharged from the third wiping unit 532 and the distribution of the flow rate are control parameters of the resin layer.
  • step S1137 when adjusting the resin film thickness, one of these control parameters is selected.
  • the control parameters related to the entire process are as follows.
  • the transport speed is a control parameter that controls the plating time of inner surface plating and outer surface plating.
  • the transport speed is selected.
  • the calculation unit 210 of the control / judgment unit 200 determines a target control value for the control parameter determined in the process of step S1137 (step S1139). For example, if the determined control parameter is the first heating temperature, the target temperature is determined. Further, if the determined control parameter is the distance from the first pouring unit 324 to the first wiping unit 332, the target distance is determined.
  • the calculation unit 210 of the control / judgment unit 200 outputs the control value determined in the process of step S1139 to each device (step S1141), and ends this subroutine.
  • control is performed. It is determined that this is not possible, an error is displayed on the display unit 240 (step S1143), and this subroutine is terminated.
  • the inner surface plating treatment is performed, the thickness of the inner surface plating is acquired by the inner surface plating treatment front plate thickness measuring device 110 and the inner surface plating treatment post-plate thickness measuring device 120, and the outer surface plating treatment is performed.
  • the outer surface plating thickness is acquired by the outer surface plating pre-apparance measuring device 130 and the outer surface plating post-outer shape measuring device 140, and the coating process is performed. An example of obtaining the coating film thickness is shown. It is not limited to these processes and measurements. Each of the following combinations can be supported.
  • the inner surface plating process is performed to obtain the thickness of the inner surface plating. 3. 3. Only the outer surface plating process is performed. 4. The outer surface plating process is performed to obtain the outer surface plating thickness. 5. Only apply. 6. The coating process is performed to obtain the coating film thickness. 7. Perform inner surface plating and outer surface plating. 8. The inner surface plating process and the outer surface plating process are performed to obtain the thickness of the inner surface plating. 9. The inner surface plating process and the outer surface plating process are performed to obtain the thickness of the outer surface plating. 10. The inner surface plating process and the outer surface plating process are performed to obtain the inner surface plating thickness and the outer surface plating thickness. 11. Inner surface plating and coating are performed. 12.
  • the inner surface plating treatment and coating treatment are performed to obtain the thickness of the inner surface plating. 13.
  • the inner surface plating treatment and the coating treatment are performed to obtain the thickness of the coating film thickness.
  • the inner surface plating treatment and the coating treatment are performed to obtain the thickness of the inner surface plating and the thickness of the coating film thickness.
  • Perform external plating and coating 16.
  • the outer surface plating treatment and the coating treatment are performed to obtain the thickness of the coating film thickness.
  • the outer surface plating treatment and the coating treatment are performed to obtain the thickness of the outer surface plating and the thickness of the coating film thickness. 19. Performs inner surface plating, outer surface plating and coating. 20.
  • the thickness of the inner surface plating is obtained by performing the inner surface plating treatment, the outer surface plating treatment, and the coating treatment. 21.
  • the thickness of the outer surface plating is obtained by performing the inner surface plating treatment, the outer surface plating treatment, and the coating treatment. 22.
  • the inner surface plating treatment, the outer surface plating treatment, and the coating treatment are performed to obtain the thickness of the coating film thickness. 23.
  • the inner surface plating treatment, the outer surface plating treatment, and the coating treatment are performed to obtain the inner surface plating thickness and the outer surface plating thickness.
  • the inner surface plating treatment, the outer surface plating treatment, and the coating treatment are performed to obtain the thickness of the inner surface plating and the thickness of the coating film thickness. 25.
  • the inner surface plating treatment, the outer surface plating treatment, and the coating treatment are performed to obtain the thickness of the outer surface plating and the thickness of the coating film thickness.
  • the inner surface plating treatment, the outer surface plating treatment, and the coating treatment are performed to obtain the thickness of the inner surface plating, the thickness of the outer surface plating, and the thickness of the coating film thickness.
  • the 26th combination is the combination of the present embodiment.
  • the measurement of the plate thickness before the inner surface plating treatment and the measurement of the plate thickness after the inner surface plating treatment were measured. May be measured.
  • the measurement of the outer shape before the outer surface plating treatment and the measurement of the outer shape after the outer surface plating treatment are measured, but either the front or rear outer shape may be measured.
  • the measurement of the outer shape before the coating treatment and the measurement of the outer shape after the coating treatment are measured, but either one of the front and rear outer shapes may be measured.
  • the plate thickness may be measured after the treatment by the pretreatment device 310 and the treatment by the first cleaning device 312 for each of the combinations 1 to 26 described above.
  • the state of the steel sheet SS at the stage before each treatment can be obtained.
  • the inner surface plating pre-plate thickness measuring device 110 and the inner surface plating post-plate thickness measuring device 120 are different from the plating process in that the sheet thickness of the steel plate SS is measured. In addition to measuring variations in the thickness of the steel plate SS, it is possible to detect scratches and dents on the steel plate SS.
  • the measurement by the inner surface plating treatment front plate thickness measuring device 110 may be performed before the treatment of the forming device 342.
  • the outer shape measuring device 130 before the outer surface plating treatment and the outer shape measuring device 140 after the outer surface plating treatment (hereinafter, simply referred to as the outer shape measuring device 130 before the outer surface plating treatment) have the outer shape of the tubular body PB and the tubular body separately from the plating treatment. Not only can the variation in the outer shape of the PB and the deviation of the tubular body PB from the perfect circle be measured, but also scratches and dents on the outer surface of the tubular body PB can be detected.
  • the measurement by the outer shape measuring device 130 before the outer surface plating process may be performed before the process of the sizing device 442.
  • the measurement by the inner surface plating pre-plate thickness measuring device 110 and the measurement by the outer surface plating pre-external shape measuring device 130 may be both measurements or only one of them. That is, the plate thickness of the steel plate SS may be measured by using the inner surface plating treatment pre-plate thickness measuring device 110, and the outer shape of the tubular body PB may be measured by using the outer surface plating treatment pre-external shape measuring device 130. Further, only the plate thickness of the steel plate SS may be measured by using only the plate thickness measuring device 110 before the inner surface plating treatment. Only the outer shape of the tubular body PB may be measured by using only the outer shape measuring device 130 before the outer surface plating treatment. It can be appropriately selected according to the required one.
  • the thickness of the unplated steel plate SS and the outer shape of the tubular PB without plating can be measured. Further, by using those in which both the first surface FF and the second surface SF of the steel plate SS are pre-plated, the thickness of the steel plate SS in the plated state and the tubular body in the plated state can be used. The outer shape of the PB can be measured.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)

Abstract

La présente invention concerne un système de fabrication d'un tuyau en acier pouvant acquérir, dans un procédé de fabrication, conjointement à la modification en continu d'une forme en une forme de plaque, une forme de tuyau ou similaire, et à l'application en continu d'un revêtement et d'une résine sous chaque forme, une épaisseur d'une couche de plaque formée dans chaque forme et une épaisseur de la résine appliquée.　Le système de fabrication du tuyau en acier comprend : un dispositif de façonnage permettant de façonner en continu, à partir d'une plaque d'acier comportant une première surface et une seconde surface orientée vers la première surface, un corps en forme de tuyau doté de la première surface en tant que surface interne et de la seconde surface en tant que surface externe ; et une unité de mesure de façonnage permettant de mesurer une épaisseur de la plaque d'acier et/ou un contour du corps en forme de tuyau.
PCT/JP2020/010376 2020-03-10 2020-03-10 Système de fabrication de tuyau en acier WO2021181540A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05240844A (ja) * 1991-11-29 1993-09-21 Nippon Steel Corp 電縫管溶接部探傷装置の倣い方法
JPH06304647A (ja) * 1993-04-27 1994-11-01 Nippon Steel Corp 寸法精度の良好な電気抵抗溶接鋼管の製造方法
JPH07198302A (ja) * 1993-12-29 1995-08-01 Toshinobu Yamashita 電縫管などの外径測定装置
JP2006334611A (ja) * 2005-05-31 2006-12-14 Jfe Steel Kk 電縫鋼管の製造方法
JP5669972B1 (ja) * 2014-05-20 2015-02-18 大和鋼管工業株式会社 めっき製品の製造方法及び製造システム及び当該製造方法によって得られた金属めっき鋼管
WO2018013715A2 (fr) * 2016-07-12 2018-01-18 U.S. Steel Tubular Products, Inc. Procédés et systèmes de mesure et d'inspection de produits tubulaires

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05240844A (ja) * 1991-11-29 1993-09-21 Nippon Steel Corp 電縫管溶接部探傷装置の倣い方法
JPH06304647A (ja) * 1993-04-27 1994-11-01 Nippon Steel Corp 寸法精度の良好な電気抵抗溶接鋼管の製造方法
JPH07198302A (ja) * 1993-12-29 1995-08-01 Toshinobu Yamashita 電縫管などの外径測定装置
JP2006334611A (ja) * 2005-05-31 2006-12-14 Jfe Steel Kk 電縫鋼管の製造方法
JP5669972B1 (ja) * 2014-05-20 2015-02-18 大和鋼管工業株式会社 めっき製品の製造方法及び製造システム及び当該製造方法によって得られた金属めっき鋼管
WO2018013715A2 (fr) * 2016-07-12 2018-01-18 U.S. Steel Tubular Products, Inc. Procédés et systèmes de mesure et d'inspection de produits tubulaires

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