WO2013100518A1 - 전자기 와이핑 장치와 이를 포함하는 도금강판 와이핑 장치 및, 도금강판 제조방법 - Google Patents
전자기 와이핑 장치와 이를 포함하는 도금강판 와이핑 장치 및, 도금강판 제조방법 Download PDFInfo
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- WO2013100518A1 WO2013100518A1 PCT/KR2012/011378 KR2012011378W WO2013100518A1 WO 2013100518 A1 WO2013100518 A1 WO 2013100518A1 KR 2012011378 W KR2012011378 W KR 2012011378W WO 2013100518 A1 WO2013100518 A1 WO 2013100518A1
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- Prior art keywords
- steel sheet
- plating
- plated
- electromagnetic
- wiping
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 208
- 239000010959 steel Substances 0.000 title claims abstract description 208
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000007747 plating Methods 0.000 claims abstract description 121
- 230000005291 magnetic effect Effects 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000011247 coating layer Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 74
- 239000010410 layer Substances 0.000 description 60
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 31
- 239000011701 zinc Substances 0.000 description 31
- 229910052725 zinc Inorganic materials 0.000 description 31
- 230000001965 increasing effect Effects 0.000 description 14
- 239000002245 particle Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 238000005188 flotation Methods 0.000 description 7
- 230000008021 deposition Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 239000002889 diamagnetic material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 210000004894 snout Anatomy 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- -1 that is Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
-
- 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
-
- 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
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
-
- 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
- C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
-
- 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
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
Definitions
- the present invention relates to a wiping facility for controlling the coating amount of the plated steel sheet, and more particularly, at least the edge of the plated adhesive layer of the steel plate passed through the plating bath prior to removal, and the gas wiping to implement at least steel sheet edge Prevents over-plating, while reducing the gas wiping ability while maintaining the line speed of the steel sheet, thereby reducing the amount of dross generated by the fly-by and fly-by, and ultimately improving the plating quality and productivity of the steel sheet.
- the present invention relates to an electromagnetic wiping device, a plated steel sheet wiping device including the same, and a plated steel sheet manufacturing method.
- FIG. 1 shows a hot dip plating of such a steel sheet, for example, a galvanizing installation.
- the steel sheet unrolled from the pay off reel (cold rolled steel sheet (S) is heat-treated through a welder and a looper, and then passes through a snout and a zinc plating bath 110 to be fused zinc. While ZL is attached to the surface of the steel sheet S, the gas wiping device (air knife) 100 of the galvanizing bath injects gas (inert gas or air) onto the surface of the steel sheet, and plated the steel sheet.
- the amount of deposition that is, the amount of zinc adhesion, is appropriately scraped off to adjust (control) the plating thickness of the steel sheet.
- the steel sheet passes through the cooling facility and the transfer rolls and passes through the plating deposition amount measuring unit 130, and the measured plating deposition amount is fed back so that the gas discharge pressure of the gas wiping device 100 or the steel sheet S and the gas wire
- the amount of plating adhesion (plating thickness) of the steel sheet is adjusted by adjusting the interval (distance) between the ping devices.
- reference numerals 112 and 114 which are not described in FIG. 1, are sink rolls and stabilizing rolls for adjusting the tension of steel sheets and the like.
- the gas wiping apparatus 100 is a main apparatus of the plating installation which directly affects the plating thickness which determines the plating quality of the steel sheet.
- an apparatus nozzle unit 101 composed of upper and lower lips 103 and 104 forming a gas discharge hole 102 is flanged to the apparatus main body 105, that is, a chamber. (F) is assembled, the apparatus main body 105 is connected to the gas supply pipe 106 provided at a high pressure, and further rectified to uniformize the flow of gas or remove foreign substances between the apparatus body and the apparatus nozzle portion. Plate 107 and the mesh net 108 may be provided.
- the momentum of the wiping jet J injected from the gas wiping apparatus 100 must be greatly increased for thin plating, thereby amplifying the gas pressure and the flow rate. To increase the gas wiping ability.
- the plating adhesion amount of the steel plate surface can normally be adjusted by controlling the pressure of the gas injected from the nozzle part 101 of a gas wiping apparatus, or the distance between a nozzle part and a steel plate.
- the line speed of the steel sheet is increased, and correspondingly, as the gas pressure or flow rate is increased, the by-products increase. There is a limit.
- the amount of dross generated due to scattering is approximately 0.4 ton / hr, but if the line speed is increased to 180 mpm to increase productivity, The amount of generation increases rapidly to 1.4 ton / hr. Therefore, as the line speed is increased, the wiping pressure of the gas increases, and correspondingly, the generation amount of fly-bys and dross increases rapidly, thereby increasing the line speed of the plating of the steel sheet. There is a limit.
- the scattering of zinc particles i.e., increase in the amount of fly ash, makes it difficult to operate at a high speed in the continuous plating process (CGL), thereby lowering the productivity. It causes pollution of the equipment or plating quality of the surface of the steel sheet and requires a separate work to remove it, which causes a problem of the workload of the field worker.
- the object of the present invention is to remove the plated adhesion layer of the steel plate edge portion passing through the plating bath, and implement gas wiping, at least the overplating of the steel plate edge
- the gas wiping ability can be reduced even when maintaining or increasing the line speed of the steel sheet, thereby reducing the amount of dross generated by the fly-by and fly-by, and ultimately improving the plating quality and productivity of the steel sheet.
- the present invention relates to an electromagnetic wiping device, a plated steel sheet wiping device including the same, and a plated steel sheet manufacturing method.
- the base device provided on one side of the plated steel plate passed through the plating bath;
- Electromagnetic wiping means provided on the device base and configured to implement a magnetic field change to control the thickness of the plated adhesion layer on the surface of the steel sheet;
- the electromagnetic wiping device In another aspect, the present invention, the electromagnetic wiping device; And,
- a gas wiping device provided upstream of the electromagnetic wiping device
- It provides a plated steel sheet wiping device including an electromagnetic wiping device configured to include.
- the present invention includes the steps of passing the plating bath to perform the plating of the steel sheet;
- It provides a plated steel sheet manufacturing method comprising a.
- an electromagnetic wiping device is disposed below the gas wiping device in the plating irradiation, and the molten metal attached to the surface of the steel sheet in advance before the steel sheet from the plating bath reaches the main gas wiping area. Since the thickness control is performed, the thickness of the steel sheet can be controlled even if the gas wiping ability is reduced.
- the present invention can lower the pressure or flow rate of the gas wiping, compared to using a single gas wiping apparatus, which is a splash problem in which molten metal particles, that is, zinc particles are scattered.
- it is possible to reduce the amount of upper dross on the bath surface of the bath with the increase of the fly ash.
- the present invention can increase the productivity and at the same time suppress the occurrence of the upper dross on the surface of the fly-by or plating bath at least than the conventional one to extend the plating quality and equipment service life.
- the electromagnetic wiping means of the present invention can be positioned in correspondence with the steel sheet width while suppressing the edge overplating of the plated steel sheet, thereby making it possible to provide an optimum plating environment.
- 1 is a block diagram showing a known plating process
- 3A and 3B are schematic diagrams showing a case of performing the conventional gas wiping alone and the gas wiping and electromagnetic preceding wiping according to the present invention.
- Figure 4 is a perspective view showing the installation state of the electromagnetic wiping device of the present invention
- FIG. 5 is a perspective view showing an electromagnetic wiping device of the present invention.
- FIG. 6 is an exploded perspective view of the present invention electromagnetic wiping device of FIG.
- FIG. 7 is a front configuration diagram showing an apparatus of the present invention in another embodiment.
- FIG. 8 is a side configuration diagram showing an apparatus of the present invention in another embodiment
- FIG. 9 is a front and side view showing the device of another embodiment of the present invention.
- Figure 10 is a front and side configuration diagram showing another embodiment of the present invention device
- FIGS. 9 and 10 is an operating state diagram showing an operating state of the device of the invention of FIGS. 9 and 10;
- FIG. 12 is a schematic diagram for explaining the principle of generating drag and buoyancy of the diamagnetic material through the induced current by the time-varying magnetic field in the device of the present invention
- FIGS. 3A and 3B only the gas wiping device 100 of FIG. 2 and the electromagnetic wiping device 1 of the present invention described in detail below are downstream of the gas wiping device 100.
- positioning further at the side is shown, respectively.
- gas wiping device 100 illustrated in FIGS. 3A and 3B substantially corresponds to the gas wiping device described with reference to FIGS. 1 and 2, the detailed structure and operation thereof will be briefly described in the present embodiment.
- the steel sheet (S) is passed through the plating bath 110 filled with molten zinc (ZL) to be limited to the zinc plating of the steel sheet to be galvanized steel sheet is described. do.
- ZL molten zinc
- the present invention is not limited to zinc plating.
- the electromagnetic wiping apparatus 1 of the present invention is provided as opposed to an edge portion ('E' in FIG. 7) in the width direction of the plated steel sheet, but the electromagnetic wiping of the present invention is performed.
- the apparatus 1 is provided in the form which extends longer than the maximum width of a steel plate along the steel plate width direction, as shown in FIG. 4 and FIG. 5, or a pair is provided near the edge of a steel plate, as shown in FIG. It is also possible.
- the present invention implements gas wiping to finally adjust the plating thickness of the steel sheet using the gas wiping device 100 and the electromagnetic wiping device 1 to adjust the plating thickness of the steel sheet 200 ), Through which a manufacturing step of plated steel sheet may be implemented.
- FIGS. 1 and 2 the components of the gas wiping device and the plating equipment shown in FIGS. 1 and 2 will be described with the same reference numerals as in FIGS. 1 and 2, and the description thereof will be briefly described.
- the present invention shows the apparatuses only on one side of the steel sheet, it is obvious that the apparatuses of the present invention are disposed symmetrically on both sides of the steel sheet.
- the plating bath 110 of FIG. Performing the step of removing the plating adhesion layer of the plated steel sheet by removing the plating adhesion layer of the steel plate edge part of the plating adhesion layer of the plated steel sheet that has passed through the plating bath through electromagnetic wiping, and the plating adhesion layer It may comprise a step of adjusting the plating thickness of the plated steel sheet for adjusting the residual plating layer of the plated steel sheet that has been previously removed through additional gas wiping.
- At least a portion of the plating adhesion layer of the steel sheet edge portion is removed in advance through electromagnetic wiping, thereby eliminating overplating of the steel sheet edge portion even when the same gas jet J is injected in the steel plate width direction during gas wiping. You can do it.
- the wiping device 100 is used.
- the electromagnetic wiping device 1 of the present invention of FIG. Since no prior removal of the zinc adhesion layer ZL of the plated steel sheet is performed, the thickness 'T1' (FIG. 3A) of the zinc adhesion layer ZL to be removed from the gas wiping device 100 is first applied at the same position. It is thicker than the thickness 'T2' (FIG. 3b) of the zinc adhesion layer removed (cut off) by inducing the zinc adhesion layer (ZL) of the steel sheet downward in a non-contact manner.
- the gas pressure (discharge pressure) or the flow rate in the gas wiping device 100 of FIG. 3B should be larger than that of FIG. 3B, and thus the zinc particles P in proportion to the gas pressure. Since the amount of scattering increases, there is a limit to increasing the traveling speed of the steel sheet in the case of FIG. 3A.
- the gas wiping is finally performed.
- the zinc adhesion layer is first cut by electromagnetic induction to reduce the gas pressure and flow rate in the gas wiping section of the main plate. In this case, the amount of zinc particles scattered or the amount of the upper dross D formed on the bath surface of the plating bath is reduced.
- one electromagnetic wiping device that extends longer than the width of the steel sheet, or through the electromagnetic wiping device is reduced in length and disposed corresponding to both edges of the steel sheet, as shown in FIG. It is possible to properly remove at least a portion of the zinc adhesion layer in advance before the gas wiping, which determines the plating thickness, to solve splash problems such as scattering of zinc particles, increase of the upper dross, and the like.
- the required gas wiping capacity gas pressure or flow rate
- line speed line speed
- the electromagnetic wiping apparatus 1 of the present invention is disposed between the plating baths on the downstream side of the main gas wiping apparatus 100 so that a part of the zinc adhesion layer on the surface of the steel sheet is scraped off as a non-electromagnetic main.
- the wiping ability which proportionally suppresses the amount of scattering of zinc particles (P) and the amount of generation of the upper dross (D).
- the electromagnetic wiping device 1 carries out the steel sheet through the zinc-clad layer on the surface of the steel sheet through an induction current through a time traveling magnetic flux that changes the (field) magnetic field with time. It is possible to remove the forced induction in the opposite direction of.
- the present invention device 1 when applying an alternating current of the single-phase or three-phase of the electromagnet block 50, or the rotation of the permanent magnets (40a, 40b), the zinc adhesion layer ( ZL) by the drag force and the lifting force (Levitation Force) formed in at least one or both of them are induced in the opposite direction of the steel sheet advance direction is removed while being removed.
- reference numeral 50 in FIG. 12 denotes an electromagnet block described in detail below
- reference numeral 40 denotes permanent magnets having different polarities, that is, the N pole magnet 40a and the S pole magnet 40b are alternately arranged. Represents a permanent magnet.
- FIG. 12 illustrates the principle of forming drag and buoyancy in the zinc plated layer (ZL), which is a diamagnetic material, by using an electromagnet (block) or a (rotated) permanent magnet.
- ZL zinc plated layer
- the permanent magnets 40 are alternately arranged with the N pole permanent magnets 40a and the S pole permanent magnets 40b, and when rotated in the device base 10 described in detail below, the magnetic field is timed.
- the induced current is generated by the time-varying magnetic field, the drag force and the lift force are formed in the diamagnetic material of molten zinc (Zn) (other, aluminum (Al), copper (Cu, etc.)).
- Zn molten zinc
- Al aluminum
- Cu copper
- the drag and flotation force can be controlled by increasing or decreasing the rotational force of the permanent magnet, and the flotation force is weak if a significant current is not applied to the electromagnet, but if an alternating current of appropriate magnitude is applied, the buoyancy formation and its control are also sufficient. It is possible.
- the electromagnetic wiping device 1 of the present invention may need to be appropriately selected and used according to the plating environment.
- FIGS. 3B to 6 and 8 illustrate the electromagnetic wiping device 1 according to the present invention using the permanent magnet 40 which mainly forms a drag until the critical speed described in FIG. 12, and FIG. 7.
- FIG. 12 illustrates the electromagnetic wiping device 1 of the present invention using the electromagnet 50 forming the drag and flotation force described in FIG. 12.
- the electromagnetic wiping device 1 of the present invention basically includes an apparatus base 10 provided to one side of the plated steel sheet S passing through the plating bath 110, and Electromagnetic wiping means 30 provided on the device base and configured to implement a magnetic field change to control the thickness of the plated adhesion layer on the steel sheet surface.
- the apparatus of the present invention by forming a drag or buoyancy force through the time-varying magnetic field described above, or both of them to guide the zinc adhesion layer (ZL) attached to the surface of the plated steel sheet (S) by electromagnetic force to the plating bath surface side in a non-contact manner It may include one of the permanent magnet 40 and the electromagnet 50 to remove.
- the electromagnetic wiping means 30 of the present invention includes a permanent magnet 40 in which the magnets 40a and 40b of different polarities are provided in a predetermined pattern on the device base 10. It is provided to remove a part of the layer without contact.
- the electromagnetic wiping means 30 of the present invention the contact base of the steel plate through the one or more electromagnets 50 provided with a single-phase or three-phase alternating current applied to the device base to generate a time-varying magnetic field, the contactless layer of the steel sheet It is provided to remove some.
- Figure 7 shows that the permanent magnet 40 and the electromagnet 50 is installed on the rotary shaft 12 and the hollow support shaft 12 ′ of the device base 10 to facilitate understanding.
- the device base 10 of the electromagnetic wiping device 1 of the present invention is a rotating shaft provided so as to drive rotation as a motor (11 in Fig. 7) in the width direction of the steel sheet ( 12) and a rotating block 16 assembled to the rotating shaft and mounted with a predetermined pattern of permanent magnets 40a and 40b of different polarities.
- the rotary block 16 is provided with magnet seating grooves 14 provided along the circumferential direction, in which N pole permanent magnets 40a and S pole permanent magnets 40b are alternately seated and fixed.
- the rotating shaft 12 fixed through the center of the rotating block 16 is, as shown in FIGS. 6 and 7, a horizontal moving body in the form of a box of the driving means 70 which will be described in detail below.
- 78 is rotatably connected via a bearing (unsigned), and a drive motor 11 is rotatably provided to the horizontal movable body 78.
- the galvanized layer of the steel sheet is scraped off to remove a portion of the steel sheet in a non-contact form with at least drag through the electromagnetic.
- fixing plates 18 are fastened to both sides of the rotation block 16 as bolts on both sides of the rotation shaft 12, thereby preventing permanent magnets from being separated from the seating groove 14. .
- the permanent magnets to the seating groove 14 is bonded through an adhesive means, it will be able to fasten with a bolt together when fastening the rotating block of the fixing plate.
- the cover body 20 surrounding the permanent magnets to the outside of the electromagnetic wiping device 1 of the present invention is provided, such a cover body 20 is not easily attached to the zinc particles It may be possible to provide a cover body 20 made of a ceramic material having a non-surface roughness or having a non-magnetic material, for example, heat resistance.
- Such a cover body 20 may be fixed to the horizontal moving body 78 as shown in FIG. 7 or fixed to the outer side of the rotating block.
- the cover agent 20 will be able to minimize or block the scattering zinc particles attached to the permanent magnets.
- FIG. 7 shows the electromagnetic wiping device 1 of the present invention using an electromagnet.
- FIG. 7 illustrates the use of the electromagnet 50 and the permanent magnet 40 on both sides of the center.
- the device will be constructed by selecting electromagnets or permanent magnets.
- the electromagnet 50 may be provided with a plurality of electromagnet blocks in a ring structure as appropriate on the hollow support shaft 12 ′ included in the device base 10.
- the shaft on which the electromagnet 50 is mounted as the hollow support shaft 12 ′ is that the electromagnet does not need to rotate like a permanent magnet, and in the case of applying single-phase or three-phase alternating current in FIG. 12.
- the cable 52 for applying an alternating current to the electromagnets 50 is for passing through the inside.
- the cable 52 associated with the electromagnet 50 is associated with the pulse width modulator 54 associated with the device controller C.
- a pulse width modulator 54 although schematically shown in the figure, may be provided on the drive means 70 to enable the steel plate width direction movement of the electromagnetic wiping device.
- the electromagnetic wiping device 1 of the present invention when the electromagnetic wiping device 1 of the present invention is provided in a structure that extends longer than the maximum width of the plated steel sheet, the zinc adhesion layer as a whole in the width direction of the steel sheet 7, or when arranging a pair of electromagnetic wiping devices 1 respectively corresponding to the edge portion E of the steel sheet, as described above, at least edge over-plating of the steel sheet is prevented. I will.
- the drive means 70 is linked to the case that the electromagnetic wiping device 1 of the present invention is moved in the steel plate width direction corresponding to the steel plate edge, the position control in response to the steel plate width.
- the electromagnetic wiping device 1 of the present invention is to be provided so as to control the position corresponding to the steel plate width in the width direction of the steel plate via the driving means 70. Can be.
- the driving means 70, the moving block 76 is fastened to the screw bar 74 provided longer than the maximum width of the steel plate plated in the width direction of the steel plate, one side of the screw bar 74
- the motor 72 is connected to the coupling structure.
- the motor 72 and the screw bars 74 may be fixed to the installation frame provided horizontally in the space between the plating bath and the gas wiping device 100 in FIG. 1. .
- the moving block 76 is provided to guide the movement of the lower guide bar 75 for supporting the load associated with the present invention
- the electromagnetic wiping device 1 is provided to support the movement of the moving block It is preferable.
- a horizontal moving body 78 in the form of a box is provided at the lower side of the moving block 76 via a connecting table 80, and the rotation shaft 12 of the apparatus of the present invention described above.
- a hollow support shaft 12 ′ may be provided.
- the moving block 76 is moved in the width direction of the steel plate while being guided by the guide rod along the screw bar according to the motor driving of the driving means 70, and eventually the electromagnetic wire provided in the horizontal moving body 78 of the present invention.
- the ping apparatus 1 makes it possible to be located appropriately in the vicinity E of the steel plate correspondingly.
- the electromagnetic wiping device 1 of the present invention at least the device base 10 and the electromagnetic wiping means 30 are position-controlled in correspondence with the steel plate width near both edges in the width direction of the steel plate. Edge overplating can be appropriately suppressed.
- a screw bar 74 of the driving means 70 and an outer side of the guide rod 75 are surrounded by a support 71 of a box structure. It is preferably provided so as to form an opening (unsigned) in an appropriate length in consideration of the moving width of the connecting table 80 in the lower portion of the support.
- the support 71 which may be provided as a box structure of, for example, iron plate welding, extends longer than the maximum width of the steel sheet and is driven with the screw bar 74. Is mounted on one side of the inside, the screw bar 74 of the moving block 76 and the horizontal movable body 78 is fastened while being rotated according to the motor drive while supporting the bearing block (74a) mounted on the support on both sides of the support To make the move possible.
- the guide rod 75 penetrates through the upper end of the rectangular moving block 76 and may be mounted at both end walls of the support 71 at both ends.
- the rotary motor 11 of the electromagnetic wiping means 30 including the permanent magnet and the motor 72 of the drive means 70 power supply PS Connected to the device control unit C through the device, and applied to the device control unit (C) pulse width for applying an alternating current to the sensor SE and the electromagnet to detect the line speed of the plated layer measuring instrument 120 and the steel sheet shown in FIG.
- the plated thickness of the steel sheet and the line speed of the steel sheet can be controlled through the device control unit to control the electromagnetic wiping ability using permanent magnets or electromagnets, thereby enabling proper plating layer thickness control. Will do.
- FIGs. 9 to 11 show other embodiments of the apparatus of the present invention shown in Figs. 7 and 8.
- the support 71 of the box structure is associated with a second drive means 90, for example a horizontal drive cylinder, and in the figure across the lower portion of the support 71.
- a second drive means 90 for example a horizontal drive cylinder
- the support 71 moves forward or backward along the guide rail according to the forward or backward movement of the horizontal drive cylinder, which is the second drive means 90. do.
- the electromagnetic wiping means 30 associated with the lower portion of the support 71 also moves forward or backward, and thus, the electromagnetic wiping means integrally when the second driving means 90 moves forward or backward.
- the gap between the 30 and the steel sheet S can be adjusted.
- This gap adjustment between the electromagnetic wiping means 30 and the steel sheet S determines the amount of shaving of the plated adhesion layer of the steel sheet in the same electromagnetic environment, so that together with the electromagnetic wiping, more precise plating adhesion layer control is achieved. Can be implemented.
- the horizontal movable body 78 rotates in the advancing direction of the steel plate via the third driving means 93 (counterclockwise or clockwise toward the vertically conveyed steel plate).
- the electromagnetic wiping means 30 is first at least through the electromagnetic wiping, before the gas wiping at the steel sheet edge, The ability to remove the plated layer at the steel sheet edge can be controlled.
- the degree of tilting at the steel sheet edge of the electromagnetic wiping means 30 is adjusted integrally with the horizontal moving body 78. .
- the connecting member 80 is divided into two upper and lower ends of the movable block 76 and the upper end of the box chain horizontal movable body 78 via a hinge (80c) and It may be provided as the lower link member (80a) (80b).
- a third drive means 93 is connected to the bracket 93e provided on the upper link member 80a constituting the connecting rod 80 by a hinge 93b, and the third drive cylinder is a third drive cylinder.
- the connecting member (3) is used during the forward and reverse operation of the third drive means 93, which is the vertical drive cylinder.
- the upper and lower link members 80a and 80b of the 80 are half as viewed from the front in the edge portion of the steel plate S, as shown in FIG. Rotate clockwise or clockwise.
- the electromagnetic wiping means 30 removes the plated adhesion layer of the edge portion of the steel sheet before the gas wiping earlier by 'DT', and thus the electromagnetic wiping means ( The larger the inclination of 30), the earlier the plating adhesion layer of the steel sheet edge is shaved, so that the amount of removal of the plating adhesion layer at the steel sheet edge portion can be controlled.
- the apparatus of the present invention the gap between the steel plate of the electromagnetic wiping means 30 and the electromagnetic wiping means 30 through the drive means and the second to third drive means. It is possible to adjust the plating thickness more precisely by controlling the coating amount more precisely by controlling the inclination at the edge of the steel sheet and the subsequent gas wiping control.
- the electromagnetic wiping device (1) of the present invention it is possible to precede the removal of the coating layer in the width direction of the plated steel sheet passed through the plating bath before the gas wiping, preferably the steel sheet Since the plating adhesion amount of an edge part is larger than the center part of a steel plate, it removes at least the plating adhesion layer of a steel plate edge part.
- the removal amount of a plating adhesion layer in a steel plate edge part removes the plating adhesion layer in a steel plate edge part by 5 to 25% of the plating adhesion amount of a steel plate center part, for example.
- the plating deposition amount at the center of the steel sheet is about 400 g / m 2, and in this case, the plating deposition amount at the edge of the steel sheet is about 440 to 500 g / m 2.
- the plating adhesion layer of the steel plate edge part is removed smaller than 5% of the plating adhesion layer of the steel plate center part, the removal amount is insufficient and the reduction of the wiping pressure in the gas wiping step cannot be expected, and the plating adhesion part of the steel plate center part is not expected. If greater than 25% of the layer is removed, it may be excessively removed, making it difficult to control uniform plating of the plating thickness of the center and edge portions of the steel sheet in the gas wiping step.
- the removal of the plating adhesion layer from the steel plate edge part is to remove the plating adhesion layer from the steel plate edge part by 10-20% of the plating adhesion layer of the steel plate center part.
- the plating adhesion amount at the edge portion of the steel sheet passing through the plating tank is larger than the plating adhesion amount at the center portion of the steel sheet, the plating adhesion layer at the center portion of the steel sheet is formed flat, but in the case of the steel sheet edge portion, the plating layer is bent while wrapping the edges. Since it is formed, the overplating of the steel plate edge portion is not eliminated even after the gas wiping.
- the plating thickness in the steel sheet width direction will be uniform after gas wiping.
- the range of the edge portion of the steel sheet to which the plated layer is preceded may be in the range of 100 to 300mm at the end of the steel sheet, usually about 200 mm.
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Abstract
Description
Claims (14)
- 도금조를 통과한 도금강판의 일측에 제공된 장치 베이스; 및,상기 장치 베이스 상에 제공되고 자기장 변화를 구현하여 강판 표면의 도금 부착층의 두께를 제어토록 구성된 전자기 와이핑 수단;을 포함하여 구성된 전자기 와이핑 장치.
- 제1항에 있어서,상기 장치 베이스와 전자기 와이핑 수단은, 구동수단을 매개로 강판의 폭방향으로 위치 제어토록 제공된 것을 특징으로 하는 전자기 와이핑 장치.
- 제2항에 있어서,상기 장치 베이스와 전자기 와이핑 수단은, 강판의 폭에 대응 하여 강판의 양측 에지부 부근에 한 쌍이 배치되면서 강판의 에지 과도금을 억제토록 구성된 것을 특징으로 하는 전자기 와이핑 장치,
- 제3항에 있어서,상기 구동수단은, 지지체의 내측에 제공되고 강판 폭방향으로 신장되며 모터로서 구동되는 스크류바아에 체결되는 이동블록; 및,상기 이동블록의 하측에 연결부재를 매개로 연결되고, 상기 장치 베이스와 전자기 와이핑 수단이 배치되는 수평 이동체;를 포함하여 구성된 것을 특징으로 하는 전자기 와이핑 장치.
- 제4항에 있어서,상기 지지체는 제2 구동수단을 매개로 전후 이동 가능하게 제공되어 상기 전자기 와이핑 수단은 강판간 간격이 조정 가능하게 제공되고,상기 수평 이동체는 제3 구동수단을 매개로 강판 진행 방향으로 회동 가능하게 제공되어 강판의 에지 과도금을 더 방지토록 구성된 것을 특징으로 하는 전자기 와이핑 장치.
- 제5항에 있어서,상기 제2 구동수단은, 지지체에 연결되는 수평 구동 실린더로 제공되면서 지지체는 가이드레일로서 지지되고, 상기 수평 이동체가 연결되는 연결부재는, 힌지를 매개로 연결되고 이동블록과 수평 이동체에 각각 장착된 링크부재로 제공되고,상기 제3 구동수단은 이동블록과 수평 이동체 사이에 연계되는 수직 구동실린더로 제공된 것을 특징으로 하는 전자기 와이핑 장치.
- 제4항에 있어서,상기 전자기 와이핑 수단의 외측에는 비자성 커버체;가 더 제공되는 것을 특징으로 하는 전자기 와이핑 장치.
- 제1항에 있어서,상기 전자기 와이핑 수단은, 상기 장치 베이스에 서로 다른 극성의 자석이 소정 패턴으로 제공된 영구자석을 포함하고,상기 영구자석이 장착되는 장치 베이스는, 강판의 폭방향으로 모터 구동토록 제공된 회전축 및, 상기 회전축에 조립되고 서로 다른 극성의 영구자석들이 소정 패턴으로 장착되는 회전블록을 포함하여 구성된 것을 특징으로 하는 전자기 와이핑 장치.
- 제1항에 있어서,상기 전자기 와이핑 수단은, 상기 장치 베이스에 단상 또는 3상의 교류전류가 인가되어 시변자계를 생성토록 구비된 하나 이상의 전자석을 포함하고,상기 장치 베이스는 강판의 폭 방향으로 제공된 중공 지지축을 포함하고, 상기 중공 지지축에 제공되는 전자석들은, 중공 지지축을 통하여 케이블을 매개로 펄스 폭 변조기와 연계되는 것을 특징으로 전자기 와이핑 장치.
- 상기 제1항 내지 제9항 중 어느 하나의 항에서 기재된 전자기 와이핑 장치; 및,상기 전자기 와이핑 장치의 상류 측에 제공된 가스 와이핑 장치;를 포함하여 구성된 전자기 와이핑 장치를 포함하는 도금강판 와이핑 장치.
- 도금조를 통과시키어 강판의 도금을 수행하는 단계;상기 도금조를 통과한 도금강판의 도금 부착층의 일부를 전자기 와이핑을 통하여 선행 제거하는 도금강판의 도금 부착층 선행 제거단계; 및,상기 도금 부착층이 선행 제거된 도금강판의 잔류 도금부착층을 추가적인 가스 와이핑을 통하여 제거하는 도금강판의 도금두께 조정단계;를 포함하여 구성된 도금강판 제조방법.
- 제11항에 있어서,상기 도금 부착층 선행 제거단계에서는, 적어도 강판 에지부의 도금 부착 층을 전자기 와이핑을 통하여 선행 제거하여 도금강판의 에지 과도금을 방지토록 구성된 것을 특징으로 하는 도금강판 제조방법.
- 제12항에 있어서,상기 도금강판의 도금 부착층 선행 제거단계와 도금두께 조정단계는, 상기 제10항에서 기재된 전자기 와이핑 장치와 가스 와이핑 장치를 이용하는 것을 특징으로 하는 도금강판 제조방법.
- 제11항에 있어서,상기 강판 에지부에서의 도금부착층 선행 제거단계에서는, 강판 중앙부의 도금 부착층의 5 ~ 25% 로 강판 에지부의 도금 부착층을 제거하는 것을 특징으로 하는 도금강판 제조방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12863129.8A EP2799586A4 (en) | 2011-12-26 | 2012-12-24 | ELECTROMAGNETIC WIPING DEVICE, WELDING DEVICE OF STEEL SHEET COMPRISING SAME, AND METHOD FOR MANUFACTURING STEEL SHEET |
JP2014549982A JP5887425B2 (ja) | 2011-12-26 | 2012-12-24 | 電磁ワイピング装置、これを含むめっき鋼板ワイピング装置、及びめっき鋼板の製造方法 |
US14/368,875 US9689063B2 (en) | 2011-12-26 | 2012-12-24 | Electromagnetic wiping device, plated steel sheet wiping apparatus including same, and method for manufacturing plated steel sheet |
CN201280070305.9A CN104126024B (zh) | 2011-12-26 | 2012-12-24 | 电磁擦拭设备、包括其的电镀钢板擦拭设备以及电镀钢板的制造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020110142255A KR101372765B1 (ko) | 2011-12-26 | 2011-12-26 | 전자기 와이핑 장치와 이를 포함하는 도금강판 와이핑 장치 |
KR10-2011-0142255 | 2011-12-26 |
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WO2013100518A1 true WO2013100518A1 (ko) | 2013-07-04 |
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PCT/KR2012/011378 WO2013100518A1 (ko) | 2011-12-26 | 2012-12-24 | 전자기 와이핑 장치와 이를 포함하는 도금강판 와이핑 장치 및, 도금강판 제조방법 |
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US (1) | US9689063B2 (ko) |
EP (1) | EP2799586A4 (ko) |
JP (1) | JP5887425B2 (ko) |
KR (1) | KR101372765B1 (ko) |
CN (1) | CN104126024B (ko) |
WO (1) | WO2013100518A1 (ko) |
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KR101639246B1 (ko) * | 2014-12-24 | 2016-07-22 | 주식회사 포스코 | 도금용 와이퍼 장치 |
CN108998750B (zh) * | 2017-06-06 | 2020-04-28 | 宝山钢铁股份有限公司 | 热镀锌锌锅内锌液的流动控制方法与装置 |
CN110205575B (zh) * | 2019-05-30 | 2024-01-09 | 河北鑫鹏通信设备有限公司 | 一种无需氮气保护的封闭式钢丝热镀锌用电磁抹拭装置 |
CN116880422B (zh) * | 2023-08-24 | 2024-01-23 | 安徽大学 | 一种电磁抹拭工艺中钢丝张力与速度耦合控制方法及系统 |
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EP2631013B1 (en) * | 2012-02-21 | 2014-10-01 | Cockerill Maintenance & Ingenierie S.A. | Coating thickness and distribution control wiping nozzle with excellent pressure uniformity |
US20150298158A1 (en) * | 2014-04-22 | 2015-10-22 | Metokote Corporation | Zinc rich coating process |
US9956576B2 (en) * | 2014-04-22 | 2018-05-01 | Metokote Corporation | Zinc rich coating process |
US20180207671A1 (en) * | 2014-04-22 | 2018-07-26 | Metokote Corporation | Zinc rich coating process |
US10717104B2 (en) * | 2014-04-22 | 2020-07-21 | Metokote Corporation | Zinc rich coating process |
EP3000907A1 (en) * | 2014-09-25 | 2016-03-30 | Strip Tinning Limited | Coatings |
US20180010225A1 (en) * | 2014-12-26 | 2018-01-11 | Posco | Apparatus for removing top dross of plating pot |
US10655205B2 (en) * | 2014-12-26 | 2020-05-19 | Posco | Apparatus for removing top dross of plating pot |
Also Published As
Publication number | Publication date |
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JP2015503675A (ja) | 2015-02-02 |
CN104126024A (zh) | 2014-10-29 |
US9689063B2 (en) | 2017-06-27 |
CN104126024B (zh) | 2017-03-29 |
EP2799586A4 (en) | 2015-09-09 |
EP2799586A1 (en) | 2014-11-05 |
JP5887425B2 (ja) | 2016-03-16 |
KR20130074268A (ko) | 2013-07-04 |
US20140356548A1 (en) | 2014-12-04 |
KR101372765B1 (ko) | 2014-03-11 |
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