WO2021117732A1 - Dispositif permettant d'éliminer un corps étranger d'une surface de rouleau, procédé permettant d'éliminer un corps étranger d'une surface de rouleau et procédé permettant de fabriquer une bande d'acier - Google Patents

Dispositif permettant d'éliminer un corps étranger d'une surface de rouleau, procédé permettant d'éliminer un corps étranger d'une surface de rouleau et procédé permettant de fabriquer une bande d'acier Download PDF

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Publication number
WO2021117732A1
WO2021117732A1 PCT/JP2020/045711 JP2020045711W WO2021117732A1 WO 2021117732 A1 WO2021117732 A1 WO 2021117732A1 JP 2020045711 W JP2020045711 W JP 2020045711W WO 2021117732 A1 WO2021117732 A1 WO 2021117732A1
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WO
WIPO (PCT)
Prior art keywords
roll
foreign matter
roll surface
projection material
unit
Prior art date
Application number
PCT/JP2020/045711
Other languages
English (en)
Japanese (ja)
Inventor
栗栖　泰
暁 樋口
大地 大瀧
Original Assignee
日本製鉄株式会社
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.)
Filing date
Publication date
Application filed by 日本製鉄株式会社 filed Critical 日本製鉄株式会社
Priority to US17/777,296 priority Critical patent/US20220402097A1/en
Priority to JP2021563978A priority patent/JP7502662B2/ja
Priority to BR112022010602A priority patent/BR112022010602A2/pt
Priority to MX2022006954A priority patent/MX2022006954A/es
Priority to CN202080083238.9A priority patent/CN114786872A/zh
Publication of WO2021117732A1 publication Critical patent/WO2021117732A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/06—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for producing matt surfaces, e.g. on plastic materials, on glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
    • B24C3/10—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating external surfaces
    • B24C3/12—Apparatus using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length

Definitions

  • the present disclosure relates to a foreign matter removing device on the roll surface, a foreign matter removing method on the roll surface, and a method for manufacturing a steel strip.
  • a roll for transporting the steel strip is provided in a heating furnace such as a continuous annealing furnace in the steel sheet manufacturing process.
  • the surface of such a roll is required to be subjected to various treatments.
  • foreign matter adhering to the roll is removed by a foreign matter scraping means for bringing a part of the thin-walled member into surface contact with the roll for the transport roll in the heat treatment furnace, and the surface of the roll is cleaned.
  • the technology is described.
  • Japanese Patent Application Laid-Open No. 2002-120153 describes a technique for plastically deforming a surface layer by performing shot peening on a welded portion of a shroud which is a constituent member in a reactor pressure vessel. Specifically, by striking particles such as steel balls against the surface layer of the welded portion, the tensile residual stress remaining in the surface layer is converted into compressive residual stress.
  • Japanese Patent No. 3932947 relates to a foreign matter scraping means in a roll surface care device that is exposed to a high temperature environment in a heat treatment furnace for a long time by means of a foreign matter scraping means permanently installed in the heating furnace in operation. Foreign matter adhering to the roll is removed. Since the foreign matter is removed during the threading, there is a problem that the removed foreign matter adheres to the steel sheet and causes a defect.
  • Japanese Patent No. 3932947 the processing related to periodic repair and maintenance performed on the transport roll while the heating furnace is stopped is not considered. For example, the removal of foreign matter that restores the surface roughness of the transport roll is not considered. Even if the technique of Japanese Patent No. 3932947 is applied to periodic repairs, the foreign matter adhering to the roll surface is removed by the foreign matter scraping means, and the roll surface is rather flattened.
  • JP-A-2002-120153 if the technique of JP-A-2002-120153 is applied to the removal of foreign matter from the transport roll, the surface shape is deformed by striking the particles against the surface of the transport roll, and compressive residual stress is generated on the surface. It is possible to make it.
  • Japanese Patent Application Laid-Open No. 2002-120153 does not consider effective removal of foreign matter from the surface of the transport roll. Therefore, even if the particles are struck on the surface of the transport roll by using the technique of JP-A-2002-120153, it is difficult to effectively remove the foreign matter on the roll surface.
  • the present disclosure has been made in view of the above problems, and the purpose of the present disclosure is new and excellent in that it is possible to easily realize the removal of foreign matter on the surface of the transport roll provided in the heating furnace. It is an object of the present invention to provide a foreign matter removing device on a roll surface, a foreign matter removing method on a roll surface, and a method for manufacturing a steel strip.
  • an injection unit that injects a projection material onto the surface of a roll that conveys a steel strip in a heating furnace, and a recovery unit that recovers the projection material.
  • a foreign matter removing device on the surface of the roll comprising: a blasting unit comprising the above, and a pressing portion for pressing the blasting unit toward the surface of the roll.
  • a step of collecting the projection material in the blasting unit and a method of removing foreign matter on the roll surface including the step of collecting the projection material are provided.
  • the step of removing the foreign matter on the surface of the roll provided in the heating furnace and the above-mentioned roll are provided by the method for removing foreign matter on the surface of the roll.
  • a method for manufacturing a steel strip including a step of passing a steel strip through a heating furnace to perform heat treatment is provided.
  • a foreign matter removing device on the roll surface As described above, according to the present disclosure, a foreign matter removing device on the roll surface, a foreign matter removing method on the roll surface, which can easily realize the foreign matter removal on the surface of the transport roll provided in the heating furnace. And a method of manufacturing a steel strip is provided.
  • FIG. 1 is a schematic view showing a configuration example of a part of an operation line provided with a heating furnace according to an embodiment of the present disclosure. It is a schematic diagram which shows the structural example of a part of the operation line provided with the heating furnace which concerns on this embodiment. It is a schematic diagram which shows the structural example of the foreign matter removing apparatus on the roll surface which concerns on this embodiment. It is a top view which shows the structural example of the foreign matter removing apparatus of the roll surface which concerns on this embodiment. It is a schematic diagram for demonstrating the structural example of the blast processing part which concerns on this embodiment. It is a schematic diagram explaining the projection angle of the projection material at the time of removing foreign matter by the blast processing part which concerns on this embodiment.
  • FIG. 1 is a schematic view showing a configuration example of a part of an operation line provided with the heating furnace 10A according to the present embodiment.
  • FIG. 2 is a schematic view showing a configuration example of a part of the operation line provided with the heating furnace 10B according to the present embodiment.
  • the heating furnace 10A is provided in, for example, a continuous hot-dip plating line (CGL; Continuus Galvanizing Line) in which the steel strip 1 is continuously immersed in the plating bath 13A and the surface of the steel strip is plated. It is a continuous annealing furnace. In the heating furnace 10A, the steel strip 1 after cold rolling is annealed.
  • the heating furnace 10A is not particularly limited, and is, for example, a continuous heating furnace capable of continuously heat-treating the steel strip 1.
  • the plating treatment equipment 13 is provided on the downstream side in the transport direction from the heating furnace 10A, and the steel strip 1 is subjected to alloying hot dip galvanizing treatment.
  • the transport direction is the direction in which the steel strip 1 goes from the right side to the left side in FIG.
  • the plating processing equipment 13 continuously attaches the molten metal M to the surface of the steel strip 1 by immersing the steel strip 1 in a plating bath 13A filled with the molten metal M, and then attaches the molten metal M to a predetermined value. It is a facility that alloys the plating film as well as the amount of grain.
  • a roll 11 for transporting the steel strip 1 is provided in the heating furnace 10A.
  • the roll 11 is a so-called hearth roll, which is rotated by a rotational force from a roll drive source (not shown) to convey the steel strip 1 in the heating furnace 10A.
  • the heating furnace 10B is a continuous annealing facility (CAPL; Continuus Annealing and Processing Line (CAPL; CAPL is a registered trademark)) provided as a part of the rolling process. Is.
  • the steel strip 1 after cold rolling is annealed.
  • the heating furnace 10B is not particularly limited, and is, for example, a vertical heating furnace capable of continuously performing heat treatment such as overaging treatment on the steel strip 1.
  • a roll 11 for transporting the steel strip 1 is provided in the heating furnace 10B. Further, the roll 11 rotates the transport direction of the steel strip 1 in the vertical direction in the heating furnace 10B, which is a vertical heating furnace.
  • the roll 11 is a so-called hearth roll, and is rotated by a rotational force from a roll drive source (not shown).
  • the heating furnaces 10A and 10B may be simply referred to as the heating furnace 10.
  • the roll 11 used in the heating furnace 10 as described above has a predetermined roughness (that is, surface roughness) for transporting the steel strip 1.
  • a predetermined roughness that is, surface roughness
  • the frictional force between the roll 11 and the steel strip 1 is secured, and meandering of the steel strip 1 during plate passing is suppressed.
  • the roughness of the roll surface may become smaller than the predetermined value due to wear due to the use of the roll 11 for a long period of time, oxide formation on the roll surface, or the like.
  • meandering of the steel strip 1 is likely to occur during plate passing, which may affect the operational stability.
  • the steel strip 1 when the steel strip 1 is made of high-strength steel, oxides due to the components in the steel may be formed on the roll surface. Specifically, Mn oxide derived from manganese (Mn), which is a component in steel, is formed on the roll surface in the form of a film. Therefore, the roughness of the roll surface becomes smaller than the predetermined value, and the steel strip 1 may meander due to a decrease in the frictional force between the steel strip 1 and the roll 11.
  • TS Tensile Strength
  • FIG. 3 is a schematic view showing a configuration example of the foreign matter removing device 100 on the roll surface according to the present embodiment.
  • the foreign matter removing device 100 on the roll surface is a device that performs a process for recovering the roughness of the roll surface 11A.
  • a part of the structure of the foreign matter removing device 100 on the roll surface (that is, a portion included in the region surrounded by the alternate long and short dash line shown in FIG. 3) is provided in the heating furnace 10, and the foreign matter is removed from the roll surface 11A.
  • Perform removal For example, the foreign matter removing device 100 on the surface of the roll is installed in the heating furnace 10 whose operation is stopped due to reasons such as during periodic repairs, and is removed from the heating furnace 10 during normal operation. That is, the foreign matter removing device 100 on the surface of the roll is temporarily installed in the heating furnace 10 and can be removed after the foreign matter removing work is completed.
  • the foreign matter removing device 100 on the surface of the rolls sequentially removes foreign matter from each roll 11. That is, after the foreign matter removing device 100 on the roll surface removes foreign matter from one roll 11 in the heating furnace 10, the foreign matter removing device 100 on the roll surface is once removed, moved, and then the other roll. It is reattached to the location corresponding to 11. After that, the foreign matter removing device 100 on the roll surface removes foreign matter from the other rolls 11.
  • a plurality of foreign matter removing devices 100 on the roll surface may be installed in the heating furnace 10.
  • the foreign matter removing device 100 on the roll surface has a blast processing unit 110 and a pressing unit 120.
  • the blasting unit 110 roughens the roll surface 11A by performing a blasting treatment on the roll surface 11A and removing foreign substances on the roll surface 11A.
  • the blast processing unit 110 includes an injection unit 111 that injects a projection material corresponding to the projection material P, which will be described later in FIG. 5, onto the roll surface 11A, and a recovery unit 113 that collects the projection material.
  • the injection unit 111 injects the projection material together with the gas corresponding to the gas G described later in FIG.
  • the recovery unit 113 recovers by sucking the projection material together with the gas.
  • a polygonal powder of a metal oxide can be mentioned, and in particular, an aluminum oxide powder (that is, alumina particles) can be mentioned.
  • the aluminum oxide is chemically stable, and even if it remains in the heating furnace, its influence on the operation of the heating furnace is suppressed. Further, since alumina powder, which is generally used as an abrasive, is relatively inexpensive, the cost required for the work of removing foreign matter can be reduced.
  • the projection material of other polygonal metal oxides a powder of zirconium oxide (that is, zirconia) can be mentioned.
  • other examples of the projection material include silicon carbide (SiC) powder.
  • the Vickers hardness is about 2000 to 3000.
  • the particle size of the projection material it is about # 30 to # 220.
  • Compressed air is an example of the gas injected together with the projection material.
  • the pressure at the time of injection is, for example, about 0.2 MPa to 0.7 MPa.
  • the range of the injection pressure of the compressed air is preferably 0.2 MPa or more and 0.5 MPa or less.
  • the injection pressure is less than 0.2 MPa
  • the pressure is small, so that the injected projection material P does not easily bite into the oxide film C, and as a result, the oxide film C cannot be sufficiently removed.
  • the injection pressure exceeds 0.5 MPa
  • the injected projection material P may bite into the roll surface 11A and remain on the roll surface 11A. Therefore, the projecting material P that bites into the steel sheet may cause a flaw in the steel sheet.
  • the Mn oxide is sufficiently removed even if the injection pressure value is a relatively low value within the range of 0.2 MPa or more and 0.5 MPa or less. I found that I could do it.
  • the projection material and gas injected from the injection unit 111 are supplied from outside the furnace via the hose 130 in FIG. Specifically, the projection material is supplied from outside the furnace via the projection material supply hose 131. Further, the gas is supplied from outside the furnace via the gas supply hose 132. Although the details will be described later, the end portions of the projection material supply hose 131 and the gas supply hose 132 on the outside of the furnace are connected to the projection material supply source and the gas supply source, respectively. Further, the projection material and the gas recovered by the recovery unit 113 are discharged to the outside of the furnace via the discharge hose 133.
  • the pressing unit 120 presses the blasting unit 110 toward the surface 11A of the roll. Although the details will be described later, by pressing the blast processing unit 110 toward the roll surface 11A, a closed space is formed between the inner surface of the blast processing unit 110 and the roll surface 11A. As a result, the projecting material injected from the injection unit 111 is prevented from being scattered in the furnace.
  • An example of the pressing portion 120 is an air cylinder 121.
  • the foreign matter removing device 100 on the roll surface may further have a link arm 101 that arranges the blast processing unit 110 and the pressing unit 120 at predetermined positions with respect to the roll surface 11A.
  • the link arm 101 is an arm-shaped member connected by one or more joint structures.
  • the link arm 101 allows the blasting unit 110 and the pressing unit 120 to be arranged at predetermined positions with respect to the roll surface 11A even when the diameters of the plurality of rolls 11 provided in the heating furnace 10 are different from each other.
  • a blast processing portion 110 and a pressing portion 120 are attached to one end portion 101A of the link arm 101 via a bracket.
  • the other end 101B of the link arm 101 is attached to the main body 103 of the foreign matter removing device 100 on the roll surface, which will be described later.
  • the foreign matter removing device 100 on the roll surface further includes a detection unit 140 that detects the distance between the blast processing unit 110 and the surface 11A of the roll.
  • the detection unit 140 is positioned at a predetermined position with respect to the roll surface 11A via a bracket attached to one end 101A of the link arm.
  • the detection unit 140 measures the distance to the roll surface 11A.
  • An example of the detection unit 140 is a laser sensor.
  • the foreign matter removing device 100 on the surface of the roll may further include a roll rotation mechanism 150 for rotating the roll 11.
  • the roll rotation mechanism 150 rotates the roll 11 in a state where the rotational force for transporting the steel strip 1 is not supplied to the roll 11.
  • the roll rotation mechanism 150 rotates the roll 11 by rotating the rotating portion 151 in a state where the outer peripheral surface 151A is in contact with the surface 11A of the roll.
  • the rotating portion 151 is a small roll as an example, and the rotating portion 151 is driven by a drive source 153 such as a motor to rotate.
  • a drive source 153 such as a motor to rotate.
  • the roll rotation mechanism 150 rotates the roll 11 by rotating the rotating portion 151 in a state where the outer peripheral surface 151A is in contact with the roll surface 11A. That is, when the roll 11 is rotated, the roll rotation mechanism 150 requires a simple structure, so that the foreign matter removing device 100 on the roll surface can be miniaturized.
  • the foreign matter removing device 100 on the surface of the roll may further have a main body 103.
  • Various configurations such as the blast processing unit 110, the pressing unit 120, and the roll rotation mechanism 150 described above are attached to the main body unit 103.
  • the foreign matter removing device 100 on the surface of the roll is installed in the heating furnace 10 via the main body 103. Since various configurations of the foreign matter removing device 100 on the roll surface can be integrally attached to or removed from the heating furnace 10 by the main body 103, workability is improved.
  • the main body 103 is a structure having a longitudinal direction along the axial direction of the roll 11 parallel to the X direction in FIG.
  • the structure as the main body 103 is attached to beam-shaped members provided in the heating furnace 10 along the transport direction of the steel strip 1 at both ends in the longitudinal direction.
  • the illustration of the beam-shaped member is omitted.
  • the main body 103 is attached to the beam-shaped member of the heating furnace 10 via a fixing jig (not shown).
  • the foreign matter removing device 100 on the surface of the roll may have an air supply / exhaust system 160 outside the furnace so that the projection material recovered by the recovery unit 113 can be reused.
  • the foreign matter removing device 100 on the surface of the roll may have a recovery tank 161, a dust collector 163, and a blower 165.
  • the pressure inside the discharge hose 133, the recovery tank 161 and the dust collector 163 is negative with respect to the outside air. Therefore, the projection material recovered from the recovery unit 113 moves in the discharge hose 133 to the recovery tank 161.
  • the projecting material transferred to the recovery tank 161 via the discharge hose 133 is separated from dust and the like other than the projecting material by centrifugation in the recovery tank 161.
  • the selected projecting material is supplied to the injection unit 111 again via the projecting material supply hose 131.
  • the dust and the like separated from the projection material are collected by the dust collector 163, and the gas cleaned by the dust collection is discharged from the blower 165.
  • the foreign matter removing device 100 on the surface of the roll has a gas supply source 167 outside the furnace.
  • the gas of a predetermined pressure supplied from the gas supply source 167 is supplied to the injection unit 111 via the gas supply hose 132.
  • the projection material is injected together with the gas supplied from the gas supply source 167.
  • An example of the gas supply source 167 is an air supply facility in a factory.
  • FIG. 4 is a top view showing a configuration example of the foreign matter removing device 100 on the roll surface according to the present embodiment.
  • the foreign matter removing device 100 on the roll surface may have a moving mechanism 170 that moves the blast processing unit 110 along the axial direction of the roll 11 parallel to the X direction in FIG. ..
  • the moving mechanism 170 makes the blast processing unit 110 movable in a region (that is, a region W in FIG. 4) of the roll 11 excluding the inclined portion of the end portion in the axial direction.
  • the moving mechanism 170 As an example of the moving mechanism 170, as shown in FIG. 4, a screw feeding mechanism can be mentioned. Specifically, the moving mechanism 170 includes a screw feed mechanism 171, a drive source 173, and a guide shaft 175.
  • the screw feed mechanism 171 includes a screw shaft 171A whose axial direction is provided along the direction of the rotation shaft X1 of the roll 11, and a support portion 171B that rotatably supports both ends of the screw shaft 171A.
  • roll axial direction the direction of the rotation axis X1 is simply referred to as "roll axial direction”.
  • the rotation axis X1 coincides with the axial direction of the roll 11.
  • the screw shaft 171A is a rod-shaped member in which threads are provided on the outer peripheral surface at a predetermined pitch. As shown in FIG. 4, the screw shaft 171A is inserted while being screwed into the other end 101B of the link arm 101. Further, a drive source 173 is connected to the end of the screw shaft 171A, and the screw shaft 171A is configured to be rotated by the drive source 173. As a result, the rotation of the screw shaft 171A causes the blast processing unit 110 to be screwed forward and move along the axial direction of the roll 11.
  • the guide shaft 175 is a rod-shaped member provided along the axial direction of the roll 11 in parallel with the screw shaft 171A. Both ends of the guide shaft 175 are supported by the support portion 171B of the screw shaft 171A.
  • the moving mechanism 170 has been described with an example of linearly moving the blast processing unit 110 along the axial direction of the roll 11, but the present disclosure is not limited to such an example.
  • the moving mechanism 170 may move the blasting unit 110 so as to include the axial component of the roll 11 in the moving direction of the blasting unit 110.
  • the blasting unit 110 meanders or It may be moved diagonally.
  • FIG. 5 is a schematic diagram for explaining a configuration example of the blast processing unit 110.
  • the blasting unit 110 performs a blasting process on the roll surface 11A while being pressed by the air cylinder 121 as the pressing unit 120.
  • an injection unit 111 is provided in the center of the blast processing unit 110, and a recovery unit 113 is provided around the injection unit 111. That is, the projecting material P injected from the injection unit 111 collides with the roll surface 11A and is then collected from the collection unit 113 provided around the injection unit 111.
  • the blast processing unit 110 has a double cylinder shape 115. That is, the blast processing unit 110 has a double tubular body shape 115 including an inner cylinder portion 115A and an outer cylinder portion 115B surrounding the inner cylinder portion 115A. As shown in FIG. 5, in the blast processing unit 110, the inner cylinder portion 115A forms at least a part of the injection unit 111, and the outer cylinder portion 115B forms at least a part of the recovery unit 113.
  • the double cylinder shape 115 is a shape in which a double annular structure is formed at least partially by the inner cylinder portion 115A and the outer cylinder portion 115B in the cross-sectional view of the blast processing unit 110. Point to.
  • the inner cylinder portion 115A is a so-called blast gun for injecting the projection material P
  • the outer cylinder portion 115B is a hollow semi-spindle-shaped hood provided around the blast gun. ..
  • the reflected projection material P is collected from the collection unit 113 along the inner peripheral surface of the hood. That is, as illustrated by the arrow in FIG. 5, the projection material P is sucked from the recovery unit 113 by the flow of the gas G in the hood of the blast gun. In this way, the projection material P is prevented from scattering after colliding with the roll surface 11A.
  • the projection material P is injected by the injection unit 111 in a state where the blast processing unit 110 is pressed by the pressing unit 120 and a closed space 117 is formed between the blast processing unit 110 and the roll surface 11A.
  • the collection unit 113 collects the space.
  • the closed space does not mean a space completely closed to the outside, but may be a space isolated from the outside to the extent that scattering of the projection material P can be suppressed.
  • a flexible member 180 may be provided at the end of the outer cylinder portion 115B on the roll surface 11A side.
  • a load associated with the pressing is applied to the roll surface 11A. Therefore, since the flexible member 180 is provided at the end of the outer cylinder portion 115B, the load applied to the roll surface 11A when the blast processing portion 110 is pressed toward the roll surface 11A by the pressing portion 120. Is distributed. As a result, the occurrence of flaws on the roll surface 11A is suppressed. Further, the flexible member 180 fills the gap between the outer cylinder portion 115B of the blasting portion 110 and the roll surface 11A, so that the projection material P is further suppressed from being scattered into the heating furnace 10.
  • a brush-shaped member 181 attached to the end of the outer cylinder portion 115B.
  • the brush-shaped member 181 has a plurality of bristles having one end fixed to the outer cylinder portion 115B side and the other end extending toward the roll surface 11A.
  • a plurality of bristles of the brush-shaped member 181 are deformed so as to fall in the outer peripheral direction to fill the gap between the outer cylinder portion 115B and the roll surface 11A. Can be done.
  • the flexible member 180 is sufficient as long as it can fill the gap between the outer cylinder portion 115B and the roll surface 11A and has sufficient flexibility to withstand the load applied by the pressing portion 120.
  • the shape, structure, and material of the flexible member 180 are not particularly limited.
  • a rubber sheet may be attached to the surface of the end of the outer cylinder portion 115B facing the roll surface 11A.
  • a sponge-like member may be attached to the end portion of the outer cylinder portion 115B.
  • the blast processing unit 110 is pressed against the roll surface 11A by the air cylinder 121 as the pressing unit 120. Further, the projection material P is projected from the injection unit 111 of the blast processing unit 110, and the foreign matter on the roll surface 11A is removed. Further, the collecting unit 113 collects the projecting material P that hits the roll surface 11A and bounces off.
  • the projection angle ⁇ of the projection material P with respect to the roll surface 11A is the tangent line L1 at the projection target position 11A1 on the roll surface 11A and the blast processing unit 110 when viewed along the axial direction of the roll 11. It is defined as the angle on the acute angle side of the angles formed between the injection portion 111 and the central axis L2 of the inner cylinder portion. In this embodiment, the projection angle ⁇ is 90 degrees.
  • the intersection of the tangent line L1 of the alternate long and short dash line extending in the left-right direction and the central axis L2 of the alternate long and short dash line extending in the vertical direction is the projection target position 11A1 of the projection material P.
  • the range of the projection angle ⁇ is preferably 80 degrees or more and 90 degrees or less.
  • the oxide film C adhering to the roll surface 11A can be efficiently removed.
  • the projection angle ⁇ is less than 80 degrees, the injected projection material P is less likely to bite into the oxide film C, so that the oxide film C cannot be sufficiently scraped off.
  • the distance between the blast processing unit 110 and the roll surface 11A is detected by the detection unit 140.
  • the injection of the projection material P is stopped.
  • An example of a predetermined distance at which the injection of the projection material P is stopped is about several mm to several tens of mm.
  • scattering of the projection material P into the heating furnace 10 is suppressed.
  • the distance between the blasting unit 110 and the roll surface 11A is 5 mm or less. It is preferable from the viewpoint of achieving both efficient removal of C and reduction of compressed air loss.
  • the above operation example is controlled by the control unit 190 in FIG. 5 as an example.
  • the control unit 190 supplies the projection material P and the gas G to the blast processing unit 110, and controls the air supply / exhaust system 160 so as to recover the projection material P. Further, the control unit 190 controls the operation of the air cylinder 121 that presses the blast processing unit 110.
  • control unit 190 derives the distance between the blast processing unit 110 and the roll surface 11A based on the detection result of the distance to the roll surface 11A detected by the laser sensor as the detection unit 140. Further, the control unit 190 controls the air cylinder 121 or the air supply / exhaust system 160 based on the derivation result.
  • the function as the control unit 190 is realized, for example, by the cooperation of a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like.
  • control unit 190 may control the roll rotation mechanism 150 and the movement mechanism 170. That is, the control unit 190 may operate the roll rotation mechanism 150 to rotate the roll 11 while removing foreign matter from the roll surface 11A by the blast processing unit 110. Further, the control unit 190 may operate the movement mechanism 170 to move the blast processing unit 110 from one position in the axial direction of the roll 11 to another position.
  • the schematic configuration of the foreign matter removing device 100 on the roll surface according to the present embodiment has been described above.
  • FIGS. 7A to 7C are schematic views of the roll surface 11A for explaining the state of foreign matter removal by the blast processing unit 110.
  • an oxide film C may be formed on the roll surface 11A in the initial state before the foreign matter is removed.
  • Mn oxide caused by Mn which is a component in the steel strip 1 is formed on the roll surface 11A in the form of a film having an average thickness of about 100 ⁇ m as shown in FIG. 7A. If the roughness of the roll surface 11A is reduced by the formation of the oxide film C as such, meandering of the steel strip 1 may occur. Therefore, foreign matter is removed to restore the surface roughness of the roll 11 when the operation of the heating furnace 10 is stopped, such as during regular repair of the heating furnace 10.
  • the roughness of the roll surface 11A is restored by injecting the projection material P onto the roll surface 11A.
  • a pressure of about 0.5 MPa It is injected onto the roll surface 11A together with the compressed air of. As a result, the oxide film C that has reduced the roughness is removed, and the roll surface 11A is roughened.
  • the roughening treatment of the roll surface 11A by removing foreign matter means a treatment of setting the surface roughness Ra of the roll surface 11A to a predetermined value or more.
  • Ra should be 3 ⁇ m or more, and Ra should be 6 ⁇ m or more.
  • the projection material P having a smaller particle size may be projected.
  • the particle size of the alumina particles is about # 80 to # 250
  • the projection material P having the first average particle size is sprayed as the first projection material, the first blast treatment is performed, and then the second average particle size is smaller than the first average particle size.
  • the projection material P having the above is injected as the second projection material to perform the second blast treatment.
  • the oxide film C on the roll surface 11A can be efficiently removed, and the surface roughness of the roll surface 11A can be adjusted.
  • the projection material P having the second average particle size may be injected a plurality of times about 3 to 5 times to perform the second blasting treatment.
  • the first blasting process may be performed a plurality of times.
  • the projection material P having a third average particle diameter smaller than the second average particle diameter may be injected as the third projection material to perform the third blast treatment. That is, in the present disclosure, the subsequent blasting treatment using a projection material having an average particle size smaller than the average particle size in the immediately preceding blasting treatment may be performed a plurality of times. The state of the roughening treatment of the roll surface 11A according to the present embodiment has been described above.
  • FIG. 8 is a flowchart of a method for removing foreign matter on the roll surface according to the present embodiment.
  • step S101 in the foreign matter removing step S100 on the roll surface first, the blast processing portion 110 of the foreign matter removing device 100 on the roll surface installed in the heating furnace 10 is pressed against the roll surface 11A. ..
  • step S103 the projection material P is ejected from the blast processing unit 110, and the projection material P is recovered in the blast processing unit 110. Specifically, the projection material P is injected together with the gas G from the injection unit 111 of the blast processing unit 110. Further, the projecting material P is sucked together with the gas G by the collecting unit 113 of the blast processing unit 110.
  • step S105 it is determined whether or not the foreign matter removing step S100 on the roll surface satisfies the end condition.
  • Specific termination conditions include whether the foreign matter on the roll surface 11A has been removed for a predetermined time, or whether an input for ending the foreign matter removing work has been made by the operator. If it is determined that the end condition is satisfied, the foreign matter removing step S100 on the roll surface ends. On the other hand, if it is not determined that the foreign matter removing step S100 on the roll surface satisfies the end condition, the foreign matter removing step S100 on the roll surface returns to step S101. After the work on one roll 11 is completed, the foreign matter removing work on the other roll 11 may be performed.
  • a step of moving the blast processing unit 110 along the axial direction of the roll by the moving mechanism 170 and a step of rotating the roll 11 by the roll rotating mechanism 150 may be included.
  • the second particle size is smaller than the first particle size.
  • the projection and recovery of the projection material P having an average particle size may be configured to be performed as a second blasting step.
  • FIG. 9 is a flowchart of a method for manufacturing the steel strip 1 according to the present embodiment.
  • the foreign matter removing step S100 on the roll surface is performed as described above. Specifically, since periodic repairs and the like are performed in the heating furnace 10, foreign matter on the roll surface 11A is removed from the roll 11 in the heating furnace 10 when the operation is stopped. After that, in step S110 in FIG. 9, the steel strip 1 is passed through the heating furnace 10 provided with the roll 11 to perform the heat treatment.
  • the heating furnace 10 starts operation, the steel strip 1 passes through the heating furnace 10 while being supported by the roll 11, and the steel strip 1 is subjected to various heat treatments such as overaging treatment or annealing. Is processed.
  • the roll surface 11A can be roughened and the meandering of the steel strip 1 in the heating furnace 10 can be suppressed.
  • the steel strip 1 may be high-strength steel.
  • high-strength steel an oxide film C due to the components in the steel is formed on the roll surface 11A, and the roughness of the roll surface 11A is lowered.
  • meandering of the steel strip 1 may easily occur. Therefore, by transporting the steel strip 1 by the roll 11 in the heating furnace 10 that has undergone the foreign matter removing step S100 on the roll surface, the occurrence of meandering of the steel strip 1 is suppressed.
  • the oxide film C is likely to be formed on the roll surface 11A due to the components contained in the steel strip 1, it can be removed by the blast treatment. As a result, the meandering of the steel strip 1 can be suppressed.
  • the plating treatment step of continuously immersing the steel strip 1 in the plating bath 13A may be performed after the heat treatment step in step S110.
  • various processing, control, or inspection steps for manufacturing the steel strip 1 may be added. The method for manufacturing the steel strip 1 according to the embodiment of the present invention has been described above.
  • a blast including an injection unit 111 that injects the projection material P onto the roll surface 11A of the roll 11 that conveys the steel strip in the heating furnace 10 and a recovery unit 113 that collects the projection material P.
  • Foreign matter is removed by the processing unit 110, and the blast processing unit 110 is pressed toward the roll surface 11A by the pressing unit 120.
  • the projection material P is injected while pressing the blast processing unit 110 and the projection material P is further recovered by the recovery unit 113, the residual projection material P in the heating furnace 10 is suppressed.
  • the roll 11 can be attached to the heating furnace 10, that is, the foreign matter can be removed on the operation line, and the foreign matter removing work can be easily realized. Further, according to the present embodiment, the cost required for the work of preparing and storing the replacement roll 11 is reduced as compared with the roll replacement.
  • the removal of the oxide film C may be uneven. Further, in pickling, there is a concern that the equipment may be deteriorated due to acid scattering into the heating furnace 10, and it is expected that the handling of the acidic solution requires a lot of man-hours such as preparation and disposal.
  • the roughness of the roll surface 11A is restored by removing the physical oxide film C by the blasting unit 110, so that it is more uniform than the chemical treatment such as pickling. Roughness recovery is realized.
  • the injection unit 111 is provided in the center of the blast processing unit 110, and the recovery unit 113 is provided around the injection unit 111.
  • the recovery unit 113 is provided around the injection unit 111, the projection material P injected from the injection unit 111 can be efficiently collected, and the blast processing unit 110 can be miniaturized.
  • the blast processing unit 110 has a double tubular body shape 115 including an inner cylinder portion 115A and an outer cylinder portion 115B surrounding the inner cylinder portion 115A, and the inner cylinder portion 115A injects the inner cylinder portion 115A. It is a unit 111, and the outer cylinder portion 115B is a collection unit 113. Therefore, the projection material P injected from the injection unit 111 can be efficiently recovered, and the blast processing unit 110 can be miniaturized.
  • the flexible member 180 is provided at the end of the outer cylinder portion 115B, when the flexible member 180 comes into contact with the roll surface 11A, the projection material from the blast processing portion 110 Leakage of P can be suppressed. Further, since the flexible member 180 is provided, the load on the roll surface 11A can be dispersed at the time of pressing.
  • the blasting unit 110 detects the distance between the blasting unit 110 and the roll surface 11A by the detecting unit 140 that detects the distance between the blasting unit 110 and the roll surface 11A, so that the blasting unit 110 rolls on the roll surface. It is possible to detect that the distance from 11A is large, and it is possible to prevent leakage of the projection material P.
  • the moving mechanism 170 that moves the blasting unit 110 along the axial direction of the roll 11 moves the blasting unit 110 in the axial direction of the roll to move the foreign matter on the roll surface 11A in the axial direction. Can be uniformly removed and roughened along the line. Further, since it is not necessary to provide a plurality of blast processing units 110 or widen the projection range, the foreign matter removing device 100 on the roll surface including the blast processing unit 110 can be miniaturized.
  • the roll rotation mechanism 150 for rotating the roll 11 by blasting while rotating the roll 11 by the roll rotation mechanism 150 that rotates the roll 11, foreign matter on the roll surface 11A can be uniformly removed and roughened along the circumferential direction. Further, when the roll rotation mechanism 150 for rotating the roll 11 is provided in a state where the rotational force for transporting the steel strip 1 is not supplied to the roll 11, the roll drive source used when transporting the steel strip 1 is used. The roll 11 can be rotated without using it. That is, the roll 11 is rotated by applying a rotational force from the outside through the rotating portion 151 that is in contact with the roll surface 11A. Therefore, it is easy to control the roll rotation speed according to the blasting process.
  • the injection unit 111 injects the projection material P together with the gas G
  • the recovery unit 113 collects the projection material P by sucking the projection material P together with the gas G.
  • the projecting material P is injected together with the gas G and further sucked together with the gas G, so that the projecting material P can be easily recovered.
  • the residue of impurities on the roll surface 11A can be suppressed as compared with the case of wet blasting.
  • the projection material P is polygonal alumina particles, it has sufficient hardness, so that foreign matter on the roll surface 11A can be efficiently removed. Further, since the polygonal alumina particles are chemically stable, even if they remain on the roll surface 11A, they are unlikely to be the starting points for the growth of the oxide film C.
  • the foreign matter removing device 100 on the roll surface and the foreign matter removing method on the roll surface according to the embodiment of the present invention have been described above.
  • the foreign matter removing device 100 on the roll surface 11A is applied to the foreign matter on the roll 11 in the heating furnace 10. The removal was performed, and the amount of the oxide film C removed from the roll surface 11A was examined.
  • Comparative Example 1 when the projection material P is dry ice, as Comparative Example 2, when the projection material P is a spherical powder having a particle size # 40, and as Comparative Example 3, the projection material P has a particle size #.
  • the amount of Mn oxide film removed on the roll surface 11A was examined in each of the 120 spherical powders. Further, as an example, the amount of Mn oxide film removed when the projection material P was made into polygonal alumina particles having a particle size of # 46 was investigated.
  • the amount of Mn oxide removed is the amount of decrease in the composition of the Mn component in the vicinity of the roll surface before and after the removal of foreign matter.
  • the projecting material P was projected onto the roll surface 11A at a projection angle of 90 degrees together with compressed air having a pressure of 0.3 MPa.
  • the projection conditions such as the pressure of the gas other than the projection material P are the same.
  • the amount of Mn was measured by a portable fluorescent X-ray apparatus.
  • the amount of Mn was measured by a portable fluorescent X-ray apparatus. Then, the amount of decrease in the composition of the Mn component was calculated by subtracting the amount of Mn measured after removing the foreign matter from the amount of Mn measured before removing the foreign matter.
  • 10 projection materials P are randomly extracted with respect to the shape of the projection material P. Then, the cross-sectional shape of the extracted projection material P is observed by SEM. An inspection device other than SEM may be used as long as the cross-sectional shape can be confirmed. Next, the angle of the angular portion (that is, the corner portion, hereinafter referred to as “corner”) of the outer edges of the cross-sectional shapes of each of the extracted projecting materials P is measured. The angle of the internal angle in these angles is within a preset range, that is, an angle satisfying the condition of 60 degrees or more and 170 degrees or less is defined as an angle satisfying the criteria of the present embodiment. Then, for each particle, the number of corners satisfying this criterion is counted.
  • an average value indicating how many corners satisfying the standard for the measured particle group is included in each particle is calculated.
  • the shape of the projection material P is defined as "polygonal shape”.
  • the shape of the projection material P is defined as "spherical”. In the examples, a projection material P satisfying the above conditions was used.
  • FIG. 10 is a graph showing the amount of Mn oxide removed from the roll surface 11A as an example.
  • the amount of Mn oxide removed was about 1 wt% (weight percent).
  • the amount of Mn oxide removed was about 6 wt% in Comparative Example 2 having a relatively large particle size and 2 wt% in Comparative Example 3 having a small particle size. It was about%.
  • the amount of Mn oxide removed was about 23 wt%. According to the examples, it was clarified that the amount of Mn oxide removed exceeds 20 wt%, which is a guideline for the amount of oxide removed, by using polygonal alumina particles as the projection material P.
  • the oxide film C on the roll surface 11A is removed, and the roll surface 11A is removed. It was shown that the roughness of the can be recovered. Furthermore, it was shown that by using the polygonal alumina particles as the projection material P, the oxide film C can be effectively removed as compared with the projection material in other comparative examples.
  • the difference in effect between Comparative Examples 1 to 3 and Examples is caused by the following reasons.
  • the projection material P since the projection material P has a polygonal shape, the portion including the apex of the polygon of the projection material P and the region near the apex is sharp. Therefore, when the projecting material P collides with the oxide film C of the roll surface 11A, a large force is applied to the oxide film C at the collision position of the sharp portion of the projecting material P. As a result, the oxide film C is largely destroyed by the collision of the projection material P, and the amount of Mn oxide removed can be increased.
  • the particle size of the particles of the projection material P is # 40, which is relatively close to the particle size of the particles of the projection material P of the example # 46.
  • the shape of the particles of the projection material P of Comparative Example 2 is not a polygonal shape as in the example, but a spherical shape. Therefore, for example, even in the case of particles having the same maximum length, in Comparative Example 2, the ejected spherical projection material P is compared with the case where the polygonal particles are ejected as in the example.
  • the contact area between the particles and the oxide film C is larger than that in the example.
  • the pressure per contact area given to the oxide film C by the ejected particles of the projection material P becomes smaller than that in the case of injecting the polygonal particles. Therefore, in Comparative Example 2, the oxide film C is not sufficiently destroyed.
  • Comparative Example 3 the shape of the projection material P is spherical as in the case of Comparative Example 2. Therefore, the force per contact area given to the oxide film C by the ejected particles is smaller than that in the case of ejecting the polygonal particles. Further, the particle size of the particles of the projection material P of Comparative Example 3 is # 120, which is larger than the particle size of the projection material P of Comparative Example 2 # 40. Therefore, in Comparative Example 3, the contact area between the ejected particles of the projection material P and the oxide film C is further larger than that in Comparative Example 2. As a result, in Comparative Example 3, the amount of the oxide film C to be destroyed is further reduced as compared with the case of Comparative Example 2.
  • the blast processing unit 110 may be provided on the lower surface side of the roll 11 so that the projection material P is ejected from below.
  • the example in which the blast processing unit 110 is one is shown, but a plurality of blast processing units 110, for example, two units may be provided.
  • different types of projection material P may be ejected from each blast processing unit 110.
  • the projection material P having the first particle size is ejected from the injection unit 111 of one blast processing unit 110, and the projection material P having the first particle size is smaller than the first particle size from the injection unit 111 of the other blast processing unit 110.
  • the projection material P having a particle size of 2 may be injected.
  • the injection unit 111 and the recovery unit 113 are integrated in the blast processing unit 110 is shown, but the present disclosure is not limited to such an example.
  • the injection unit 111 and the recovery unit 113 may be separate bodies.
  • the roll rotation mechanism 150 has shown an example in which the rotating portion 151 is brought into contact with the roll 11 to rotate the roll 11, but the present disclosure is not limited to such an example.
  • a belt that transmits a rotational force from a drive source may be attached to the roll 11 as the rotation mechanism of the present disclosure, and the roll 11 may be rotated via such a belt.
  • the roll 11 may be rotated by a roll drive source that rotates the roll 11 when the steel strip 1 is conveyed without providing the roll rotation mechanism 150.
  • the first aspect is A blasting unit including an injection unit that injects a projection material onto the surface of a roll that conveys a steel strip in a heating furnace, and a recovery unit that collects the projection material.
  • a pressing portion that presses the blasting portion toward the surface of the roll, and a pressing portion.
  • Aspect 2 is The foreign matter removing device on the roll surface according to the first aspect, wherein the injection unit is provided in the center of the blast processing unit, and the collection unit is provided around the injection unit.
  • Aspect 3 is The blast processing portion has a double tubular body shape including an inner cylinder portion and an outer cylinder portion surrounding the inner cylinder portion.
  • Aspect 4 is The foreign matter removing device on the roll surface according to the third aspect, wherein a flexible member is provided at the end of the outer cylinder portion.
  • Aspect 5 is The foreign matter removing device on the roll surface according to any one of aspects 1 to 4, further comprising a detection unit for detecting the distance between the blast processing unit and the surface of the roll.
  • Aspect 6 is The roll according to aspect 5, wherein when the distance between the surface of the roll detected by the detection unit and the blast processing unit becomes a predetermined value or more, the injection of the projection material by the injection unit is stopped. Surface foreign matter remover.
  • Aspect 7 is The foreign matter removing device on the surface of a roll according to any one of aspects 1 to 6, further comprising a moving mechanism for moving the blasting unit along the axial direction of the roll.
  • Aspect 8 is The foreign matter removing device on the surface of a roll according to any one of aspects 1 to 7, further comprising a roll rotation mechanism for rotating the roll.
  • Aspect 9 is The injection unit injects the projection material together with the gas, and the injection unit injects the projection material together with the gas.
  • the foreign matter removing device on the roll surface according to any one of aspects 1 to 8, wherein the recovery unit recovers the projection material by sucking it together with the gas.
  • Aspect 10 is The injection unit injects the gas in a pressure range of 0.2 MPa or more and 0.5 MPa or less.
  • Aspect 11 is The injection unit projects the projection material at a projection angle of 80 degrees or more and 90 degrees or less with respect to the roll surface when viewed along the axial direction of the roll.
  • the foreign matter removing device on the roll surface according to any one of aspects 1 to 10.
  • Aspect 12 is The foreign matter removing device on the roll surface according to any one of aspects 1 to 11, wherein the projection material is alumina particles.
  • Aspect 13 is A step of pressing the blasting portion of the foreign matter removing device on the roll surface according to any one of aspects 1 to 12 against the roll surface.
  • Aspect 14 is In the process of injecting the projection material, after injecting the first projection material having the first average particle size, the second projection material having the second average particle size smaller than the first average particle size is ejected. Spray, The method for removing foreign matter on the roll surface according to the thirteenth aspect.
  • Aspect 16 is The removal step is performed while rotating the roll by applying a rotational force via a rotation mechanism in contact with the roll surface.
  • Aspect 17 is The method for producing a steel strip according to aspect 15 or 16, wherein the steel strip is a high-strength steel.
  • the other aspect 1 is A blasting unit including an injection unit that injects a projection material onto the surface of a roll that conveys a steel strip in a heating furnace, and a recovery unit that collects the projection material.
  • a pressing portion that presses the blasting portion toward the surface of the roll, and a pressing portion.
  • a roll surface roughening treatment device including an injection unit that injects a projection material onto the surface of a roll that conveys a steel strip in a heating furnace, and a recovery unit that collects the projection material.
  • a pressing portion that presses the blasting portion toward the surface of the roll, and a pressing portion.
  • a roll surface roughening treatment device A roll surface roughening treatment device.
  • Another aspect 2 is The roll surface roughening treatment apparatus according to another aspect 1, wherein the injection unit is provided in the center of the blast processing unit, and the recovery unit is provided around the injection unit.
  • the blast processing portion has a double tubular body shape including an inner cylinder portion and an outer cylinder portion surrounding the inner cylinder portion.
  • Another aspect 4 is The roll surface roughening treatment device according to another aspect 3, wherein a flexible member is provided at the end of the outer cylinder portion.
  • Another aspect 5 is The roll surface roughening treatment apparatus according to any one of other aspects 1 to 4, further comprising a detection unit for detecting the distance between the blast processing unit and the surface of the roll.
  • Another aspect 6 is 5.
  • Another aspect 7 is The roll surface roughening treatment device according to any one of other aspects 1 to 6, further comprising a moving mechanism for moving the blasting unit along the axial direction of the roll.
  • Another aspect 8 is The roll surface roughening treatment device according to any one of other aspects 1 to 7, further comprising a roll rotation mechanism for rotating the roll.
  • Another aspect 9 is The injection unit injects the projection material together with the gas, and the injection unit injects the projection material together with the gas.
  • the roll surface roughening treatment device according to any one of other aspects 1 to 8, wherein the recovery unit recovers the projection material by sucking it together with the gas.
  • Another aspect 10 is The roll surface roughening treatment apparatus according to any one of other aspects 1 to 9, wherein the projection material is alumina particles.
  • Another aspect 11 is The step of pressing the blasting portion according to any one of the other aspects 1 to 10 against the roll surface, and A step of injecting a projection material from the blast processing unit and collecting the projection material in the blast processing unit.
  • Roughening treatment method for roll surface including.
  • Another aspect 12 is A step of roughening the surface of the roll provided in the heating furnace by the method of roughening the surface of the roll according to another aspect 11.
  • Another aspect 13 is The method for manufacturing a steel strip according to another aspect 12, wherein the steel strip is a high-strength steel.
  • the roughening of the surface of the transport roll provided in the heating furnace can be easily realized. can do.

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Abstract

La présente invention concerne un dispositif permettant d'éliminer un corps étranger d'une surface de rouleau , ledit dispositif comprenant : une unité de traitement de soufflage qui comprend une unité de pulvérisation et une unité de récupération, ladite unité de pulvérisation pulvérisant un matériau de projectile à la surface d'un rouleau qui transporte une bande d'acier à l'intérieur d'un four de chauffage, et ladite unité de récupération récupérant le matériau de projectile ; et une unité de pressage qui presse l'unité de traitement de soufflage vers la surface du rouleau.
PCT/JP2020/045711 2019-12-12 2020-12-08 Dispositif permettant d'éliminer un corps étranger d'une surface de rouleau, procédé permettant d'éliminer un corps étranger d'une surface de rouleau et procédé permettant de fabriquer une bande d'acier WO2021117732A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US17/777,296 US20220402097A1 (en) 2019-12-12 2020-12-08 Device for removing foreign matter from roll surface, method for removing foreign matter from roll surface, and method for manufacturing steel strip
JP2021563978A JP7502662B2 (ja) 2019-12-12 2020-12-08 ロール表面の異物除去装置、ロール表面の異物除去方法、及び鋼帯の製造方法
BR112022010602A BR112022010602A2 (pt) 2019-12-12 2020-12-08 Dispositivo e método para remover matéria estranha de uma superfície de cilindro, e, método para fabricar uma tira de aço
MX2022006954A MX2022006954A (es) 2019-12-12 2020-12-08 Dispositivo para eliminar materia extraña de la superficie de un rodillo, método para eliminar materia extraña de la superficie de un rodillo, y método para fabricar tiras de acero.
CN202080083238.9A CN114786872A (zh) 2019-12-12 2020-12-08 辊表面的异物去除装置、辊表面的异物去除方法及钢带的制造方法

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JP2019-224801 2019-12-12
JP2019224801 2019-12-12

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WO2021117732A1 true WO2021117732A1 (fr) 2021-06-17

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US (1) US20220402097A1 (fr)
JP (1) JP7502662B2 (fr)
CN (1) CN114786872A (fr)
BR (1) BR112022010602A2 (fr)
MX (1) MX2022006954A (fr)
WO (1) WO2021117732A1 (fr)

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