WO2015190419A1 - Appareil de polissage, procédé de polissage et procédé de fabrication de rouleau devant être immergé dans un bain de placage de métal en fusion - Google Patents

Appareil de polissage, procédé de polissage et procédé de fabrication de rouleau devant être immergé dans un bain de placage de métal en fusion Download PDF

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Publication number
WO2015190419A1
WO2015190419A1 PCT/JP2015/066404 JP2015066404W WO2015190419A1 WO 2015190419 A1 WO2015190419 A1 WO 2015190419A1 JP 2015066404 W JP2015066404 W JP 2015066404W WO 2015190419 A1 WO2015190419 A1 WO 2015190419A1
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WIPO (PCT)
Prior art keywords
polishing
roll
groove
wire
grooves
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PCT/JP2015/066404
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English (en)
Japanese (ja)
Inventor
顕 水野
栗栖　泰
Original Assignee
新日鐵住金株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 新日鐵住金株式会社 filed Critical 新日鐵住金株式会社
Priority to JP2016527785A priority Critical patent/JP6274312B2/ja
Priority to CN201580030504.0A priority patent/CN106413988B/zh
Publication of WO2015190419A1 publication Critical patent/WO2015190419A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/37—Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/16—Machines or devices using grinding or polishing belts; Accessories therefor for grinding other surfaces of particular shape

Definitions

  • the present invention relates to a polishing apparatus, a polishing method, and a method for manufacturing a roll in a molten metal plating bath.
  • the continuous molten metal plating apparatus is an apparatus for plating a metal strip (for example, a steel strip) with a molten metal such as zinc.
  • This continuous molten metal plating apparatus is, for example, a sink roll (also referred to as a pot roll) for changing the traveling direction of a steel strip as a roll in a molten metal plating bath disposed in a plating bath filled with molten metal.
  • a pair of support rolls for correcting the shape of the steel strip.
  • the steel strip introduced obliquely downward into the plating bath is changed in the vertical direction upward by the sink roll, and then passes between the pair of support rolls to be pulled out of the plating bath. Thereafter, excess molten metal adhering to the surface of the steel strip is wiped off by the gas blown from the wiping nozzle, and is controlled to a predetermined basis weight.
  • dross is composed of an Fe—Al-based compound (for example, Fe 2 Al 5 ), an Fe—Zn-based compound (for example, FeZn 7 ), and a mixture thereof, and a specific gravity difference occurs due to a difference in the mixing ratio of the components. It shows different behavior.
  • dross is classified into bottom dross (about 100 ⁇ m to several mm) that has a specific gravity greater than Zn and accumulates at the bottom of the plating bath, and relatively small floating dross (about several tens of ⁇ m) that floats in the plating bath.
  • the abundance ratio of dross in the plating bath can be controlled to some extent by the Al concentration in the bath, but essentially the generation of dross in the plating bath is inevitable.
  • dross defect When the dross adheres to the surface of the steel strip in the plate passing through the plating bath, the surface property of the plated steel plate deteriorates (dross defect). Moreover, if dross adheres to the surface of a roll in a bath such as a sink roll or a support roll, it causes a slip between the roll and the steel strip. For this reason, conventionally, in order to prevent foreign matter such as dross from adhering to the roll in the bath, a groove for discharging foreign matter is provided on the circumferential surface of the roll in the bath and enters between the roll in the bath and the steel strip. Generally, molten metal containing foreign matter such as dross is discharged through the groove.
  • Japanese Patent Application Publication No. 2005-206878 describes that a groove having a V-shaped or U-shaped groove whose groove cross-sectional shape is asymmetric in the groove width direction is provided as a dross discharge groove on the roll peripheral surface.
  • Japanese Patent Application Publication No. 4-301057 discloses an uneven surface engraved on the portion of the roll peripheral surface that contacts the steel strip between the grooves for discharging the dross, and the height difference of the uneven surface is 0.5 m to It is described that it is within a range of 5 mm.
  • Japanese Patent Application Publication No. 2009-270157 as a dross discharge groove, an elongated groove having a tilt angle within ⁇ 20 ° with respect to the roll body length direction and a depth of 0.05 to 1 mm is continuously formed. It is described to do.
  • a curved groove is formed as a dross discharge groove on a roll peripheral surface, and a crest and a trough formed by the groove are polished to obtain an appropriate rough surface. It is described that it adjusts in degrees. Specifically, by setting the surface roughness of the summit to an arithmetic average roughness Ra of 4 ⁇ m to 6.5 ⁇ m and a 10-point average roughness Rz of 20 ⁇ m or less, the wiper and scraper pressed against the roll surface Since early wear can be suppressed, it is disclosed that dross debris in the groove can be effectively removed by a wiper or the like, and dropout of dross debris from the wiper or the like can be suppressed.
  • the surplus sealing material deposited on the valley bottom is removed by setting the surface roughness of the valley bottom to 3.5 ⁇ m or less in arithmetic average roughness Ra and 12 ⁇ m or less in ten-point average roughness Rz. Therefore, it is disclosed that a surface defect (black spot defect) of the steel sheet caused by a part of the sealing material dropping off together with the dross debris and being pushed into the steel sheet can be suppressed.
  • the surface roughness of the groove top and groove bottom is adjusted by polishing the groove top portion (the above-mentioned peak portion) and the groove bottom portion (the above-mentioned valley bottom portion). It is adjusted to a different roughness.
  • Japanese Patent Application Publication No. 2013-213271 adopts a method of buffing a soft sealing film in order to adjust the surface roughness of the groove top and groove bottom.
  • the material of the sealing film is limited to a material that can be removed by buffing.
  • the spray coating itself at the bottom of the groove is not polished and smoothed, when the sealing coating is removed by scraping off the dross in the groove, a high-roughness thermal spray coating underneath is formed. As a result, the surface roughness of the groove bottom increases.
  • the purpose of the embodiment of the present specification is not to polish the entire roll peripheral surface in the molten metal plating bath, but to locally and appropriately polish only the non-contact area with respect to the metal band centering on the groove bottom. It is another object of the present invention to provide a polishing apparatus, a polishing method, and a method for producing a roll in a molten metal plating bath that can adjust the surface roughness.
  • a polishing apparatus provided with mounting means for mounting polishing means for polishing is provided.
  • the polishing means includes A polishing member pressed against the at least part of the non-contact area; and a pressing means for pressing the polishing member against the at least part of the non-contact area; Moving means for relatively moving the polishing member and the roll peripheral surface in a state in which the polishing member is pressed against the at least part of the non-contact region;
  • the mounting means mounts the pressing means and the moving means.
  • the polishing member includes at least one polishing wire
  • the polishing means further includes a support member that supports the at least one polishing wire by applying tension in a direction parallel to the groove of the roll
  • the mounting means further mounts the support member
  • the pressing unit is a pressing unit that presses the at least one polishing wire against the at least part of the non-contact region by pressing the support member toward the roll.
  • the polishing member includes a plurality of polishing wires
  • the polishing means supports the plurality of polishing wires by applying tension in a direction parallel to the plurality of grooves of the roll, and supports the plurality of polishing wires by a natural number times the pitch of the plurality of grooves.
  • a support member that is supported at regular intervals at a pitch of The pressing unit is a pressing unit that presses the plurality of polishing wires against the at least part of the non-contact regions of the plurality of grooves by pressing the support member toward the roll.
  • the polishing means further includes a moving mechanism that relatively moves the support member and the roll in the roll axial direction,
  • the mounting means further mounts the moving mechanism.
  • the supporting member generates a certain tension in the plurality of polishing wires by pulling the plurality of hooks in a direction in which the plurality of polishing wires are stretched and a plurality of hooks on which the plurality of polishing wires are stretched.
  • a tension generating mechanism preferably, The supporting member generates a certain tension in the plurality of polishing wires by pulling the plurality of hooks in a direction in which the plurality of polishing wires are stretched and a plurality of hooks on which the plurality of polishing wires are stretched.
  • the support member further includes a spacer that is disposed between the hooks adjacent to each other in the roll axial direction and corrects the swelling of the polishing wire that occurs around the hook.
  • a polishing method comprising a polishing step of polishing with a polishing means for polishing is provided.
  • the polishing means includes A polishing member pressed against the at least part of the non-contact area; and a pressing means for pressing the polishing member against the at least part of the non-contact area; Moving means for relatively moving the polishing member and the roll peripheral surface in a state in which the polishing member is pressed against the at least part of the non-contact region; In the polishing step, the polishing member and the roll peripheral surface are relatively moved by the moving means while the polishing member is pressed against the at least part of the non-contact region by the pressing means, Selectively mechanically polishing at least a portion of the non-contact region.
  • the polishing member includes at least one polishing wire
  • the polishing means further includes a support member that supports the at least one polishing wire by applying tension in a direction parallel to the groove of the roll, In the polishing step, the pressing means presses the support member against the roll to press the at least one polishing wire against the at least part of the non-contact region, and at least the non-contact region. Selectively mechanically polishing a portion.
  • the polishing member includes a plurality of polishing wires
  • the polishing means supports the plurality of polishing wires by applying tension in a direction parallel to the plurality of grooves of the roll, and supports the plurality of polishing wires by a natural number times the pitch of the plurality of grooves.
  • a support member that is supported at regular intervals at a pitch of In the polishing step the plurality of polishing wires are pressed against the at least part of the non-contact regions of the plurality of grooves by pressing the supporting member against the roll side with the pressing unit. Selectively polishing the at least part of the non-contact region of the plurality of grooves against which the polishing wire is pressed.
  • the polishing means further includes a moving mechanism that relatively moves the support member and the roll in the roll axial direction,
  • the plurality of polishing wires are pressed against the at least part of the non-contact regions of the plurality of grooves by pressing the supporting member against the roll side with the pressing unit.
  • the plurality of polishing wires are moved in the roll axis direction by relatively moving the support member and the roll in the roll axis direction by one or more times the pitch of the grooves in the roll axis direction by the moving mechanism.
  • the plurality of polishing wires in a state where the plurality of polishing wires are pressed against the at least part of the non-contact region of the next plurality of grooves by pressing the supporting member against the roll side by the pressing unit. And selectively mechanically polishing the at least part of the non-contact region of the next plurality of grooves pressed against each other.
  • (13) forming a plurality of grooves on the roll peripheral surface; Then, the manufacturing method of the roll in a molten metal plating bath provided with the process of grind
  • a polishing apparatus for polishing a roll in a molten metal plating bath in which a plurality of grooves are formed on the roll peripheral surface, At least one polishing wire; A support member for supporting the polishing wire by applying tension in a direction parallel to the groove of the roll; With The peripheral surface of the roll in which the groove is formed has a contact area that comes into contact with the metal band when the metal band is plated using a continuous molten metal plating apparatus in which the roll is installed in a plating bath, and the metal band And non-contact areas that do not contact
  • the polishing apparatus comprises: By winding the polishing wire supported by the support member around the groove on the peripheral surface of the roll, and rotating the roll, the polishing wire is brought into contact with the non-contact region in the groove, thereby bottom of the groove.
  • a polishing apparatus is provided that polishes a part or all of the non-contact region in the groove around the center.
  • the non-contact area is an area where the height from the bottom of the groove is less than 0.9 times the depth of the groove in the roll peripheral surface where the groove is formed.
  • the contact area may be an area where the height from the bottom of the groove is not less than 0.9 times the depth of the groove on the roll peripheral surface where the groove is formed.
  • a ratio of a polishing region polished by the polishing wire in the non-contact region in the groove may be 30% or more.
  • the polishing apparatus polishes a part or all of the non-contact area in the groove with the polishing wire as a center so that the surface roughness of the non-contact area is less than 2 ⁇ m in Ra. You may make it do.
  • the polishing wire may be made of a stranded wire of a plurality of wire strands.
  • the tension of the polishing wire supported by the support member may be 5 to 30N.
  • a moving mechanism that relatively moves the support member and the roll supporting the polishing wire in the roll axis direction;
  • the support member supports a plurality of the polishing wires at equal intervals with a pitch P that is a natural number multiple of the pitch of the grooves,
  • the plurality of polishing wires supported by the support member are wound around the plurality of grooves of the roll, and the plurality of polishing wires are rotated in the non-contact region in the plurality of grooves while rotating the roll.
  • the plurality of polishing wires are sent out by the moving mechanism in the roll axis direction by one or more times the pitch of the grooves.
  • a part or all of the non-contact area in the next plurality of grooves may be polished.
  • the support member supports a plurality of the polishing wires at equal intervals with a pitch P that is a natural number multiple of the pitch of the grooves,
  • the support member is A plurality of hooks on which the plurality of polishing wires are stretched;
  • a tension generating mechanism for generating a constant tension in the plurality of polishing wires by pulling the hook in a direction in which the plurality of polishing wires are stretched; You may make it provide.
  • the support member is A spacer that is disposed between the hooks adjacent to each other in the roll axis direction and corrects the swelling of the polishing wire that occurs around the hook may be further provided.
  • the plurality of polishing wires may be arranged at equal intervals with the pitch P by stretching the plurality of hooks arranged in a staggered manner so that one polishing wire meanders.
  • the ratio (P / d) between the pitch P and the wire diameter d of the polishing wire may be 5 to 10,000.
  • a rotation mechanism that rotates the roll around a roll axis;
  • a moving mechanism for relatively moving the polishing wire and the roll; Further comprising By rotating the roll by the rotating mechanism while bringing the polishing wire inserted into the groove by the moving mechanism into contact with the non-contact area in the groove, the inside of the groove is centered on the bottom of the groove. A part or all of the non-contact area may be polished.
  • the number of rotations of the roll is 1 to 400 rpm
  • the polishing time of one groove is 1 to 1200 s
  • the winding angle of the polishing wire with respect to the roll peripheral surface may be 1 to 180 °.
  • the particle size of the abrasive fixed or supplied to the polishing wire is 0.1 to 200 ⁇ m,
  • the diameter D of the polishing wire may be 0.01 to 2 ⁇ R B mm (R B : radius of curvature of the bottom of the groove).
  • a polishing method for polishing a roll in a molten metal plating bath in which a plurality of grooves are formed on the peripheral surface of the roll The peripheral surface of the roll in which the groove is formed has a contact area that comes into contact with the metal band when the metal band is plated using a continuous molten metal plating apparatus in which the roll is installed in a plating bath, and the metal band And non-contact areas that do not contact
  • a polishing wire supported by applying tension in a direction parallel to the groove of the roll is wound around the groove on the peripheral surface of the roll, and the roll is rotated while the polishing wire is not contacted in the groove.
  • a polishing method is provided in which a part or all of the non-contact region in the groove is polished around the bottom of the groove by contacting the region.
  • polishing instead of polishing the entire roll peripheral surface, using a polishing wire wound around the non-contact region in the groove, only the non-contact region that does not contact the metal band on the roll peripheral surface, Polishing can be performed locally around the groove bottom. Therefore, it is possible to appropriately adjust only the surface roughness of the non-contact area in the groove without polishing the contact area that contacts the metal strip. Therefore, the surface roughness of the non-contact region can be adjusted to a desired roughness regardless of the presence or absence of the sealing film and the material.
  • FIG. 1 It is a schematic diagram which shows the continuous molten metal plating apparatus which concerns on 1st Embodiment. It is a perspective view which shows the sink roll which is an example of the roll in the molten metal plating bath which concerns on the embodiment. It is an expanded sectional view showing the peripheral surface of the sink roll concerning the embodiment. It is sectional drawing which shows the grinding
  • the inventors of the present invention intensively grinded the groove on the roll peripheral surface using a wire-like grinding tool to locally grind the non-contact area with respect to the metal band centered on the groove bottom.
  • the inventors have found that the surface roughness of the contact area can be appropriately adjusted, and have come up with the following embodiments.
  • FIG. 1 is a schematic view showing a continuous molten metal plating apparatus 1 according to this embodiment.
  • the continuous molten metal plating apparatus 1 is used for continuously adhering molten metal to the surface of a steel strip 2 by immersing the steel strip 2 in a plating bath 3 filled with molten metal.
  • the continuous molten metal plating apparatus 1 includes a bathtub 4, a snout 5, a sink roll 6, a pair of support rolls 7 and 8, and a wiping nozzle 9.
  • Steel strip 2 is an example of a metal strip to be plated with molten metal.
  • the molten metal constituting the plating bath is generally a corrosion-resistant metal such as zinc, lead-tin, or aluminum, but may be other metals used as the plating metal.
  • Typical examples of the hot dip galvanized steel sheet obtained by plating the steel strip 2 with molten metal are galvanized steel sheets and galvannealed steel sheets, but other types of galvanized steel sheets may also be used. Below, the example which manufactures a galvanized steel sheet by using a molten zinc as a molten metal which comprises the plating bath 3, and making a molten zinc adhere to the steel strip 2 surface is demonstrated.
  • the bathtub 4 stores the plating bath 3 made of the molten metal.
  • the snout 5 is inclined so that one end thereof is immersed in the plating bath 3.
  • the sink roll 6 is disposed at the lowermost position in the plating bath 3 and has a larger roll diameter than the support rolls 7 and 8.
  • the sink roll 6 rotates clockwise as shown in the drawing as the steel strip 2 travels.
  • the sink roll 6 changes the direction of the steel strip 2 introduced through the snout 5 and obliquely downward into the plating bath 3 in the vertical direction.
  • the support rolls 7 and 8 are disposed above the sink roll 6 in the plating bath 3 and are disposed so as to sandwich the steel strip 2 pulled up from the sink roll 6 in the vertical direction from both the left and right sides.
  • the support rolls 7 and 8 are rotatably supported by bearings (not shown) (for example, sliding bearings, rolling bearings, etc.).
  • the wiping nozzle 9 is composed of a pair of gas wiping nozzles for blowing a gas (for example, air) on both surfaces of the steel strip 2.
  • the wiping nozzle 9 is disposed outside the plating bath 3 immediately above the support rolls 7 and 8 and above the bath surface of the plating bath 3 by a predetermined height.
  • the wiping nozzle 9 blows gas on both surfaces of the steel strip 2 pulled up in the vertical direction from the plating bath 3 to wipe away excess molten metal. Thereby, the basis weight of the molten metal with respect to the steel strip 2 surface is controlled to an appropriate amount.
  • the continuous molten metal plating apparatus 1 moves the steel strip 2 in the longitudinal direction by a driving source (not shown) and passes each part in the apparatus.
  • the steel strip 2 is introduced obliquely downward into the plating bath 3 through the snout 5 and circulates around the sink roll 6 so that its traveling direction is converted upward in the vertical direction.
  • the steel strip 2 passes through between the support rolls 7 and 8 and rises to the outside of the plating bath 3.
  • the steel strip 2 pulled out of the plating bath 3 is controlled to a predetermined basis weight by wiping away excess molten metal by the pressure of the gas blown from the wiping nozzle 9.
  • the continuous molten metal plating apparatus 1 continuously immerses the steel strip 2 in the plating bath 3 and performs plating with a molten metal, for example, molten zinc, so that a predetermined amount of molten metal plating is achieved.
  • a molten metal for example, molten zinc
  • FIG. 2 is a perspective view showing a sink roll 6 which is an example of a roll in a molten metal plating bath according to the present embodiment.
  • FIG. 3 is an enlarged cross-sectional view showing the peripheral surface of the sink roll 6 according to the present embodiment.
  • the sink roll 6 has a roll width wider than the width of the steel strip 2.
  • the roll width W is 1000 to 2500 mm
  • the roll diameter ⁇ is 600 to 1000 mm.
  • the sink roll 6 rotates around the roll shaft 6 a and assists the traveling of the steel strip 2 in the plating bath 3.
  • the sink roll 6 includes a roll base 20, a thermal spray coating 21 formed on the surface of the roll base 20, and a sealing coating 22 (uppermost layer coating) formed on the upper surface of the thermal spray coating 21. ).
  • the roll base 20 is formed of a metal such as steel, for example, and forms the basic shape of the sink roll 6.
  • a plurality of grooves 10 to be described later are formed on the peripheral surface of the roll base 20 by cutting or the like.
  • the thermal spray coating 21 is formed by spraying a thermal spray material containing ceramics and metal on the surface of the roll base 20.
  • the thermal spray material forming the thermal spray coating 21 is made of a material (cermet) in which ceramics and metal are combined.
  • the thermal spray material is a composite of carbide (tungsten carbide, chromium carbide, etc.), boride (tungsten boride, molybdenum boride, etc.), and oxide (alumina, yttria, chromia, etc.), and two or more of these.
  • the alloy contains at least 40% by mass or more, and the remainder contains an alloy containing one or more of nickel, iron, cobalt, chromium, and aluminum.
  • the thickness of the thermal spray coating 21 is, for example, 20 to 200 ⁇ m, and the hardness of the thermal spray coating 21 is, for example, HV800 or more.
  • the Vickers hardness is defined by ISO 6507-1.
  • the sealing film 22 is formed by applying and baking a sealing material on the surface of the thermal spray coating 21.
  • the sealing film 22 is made of a ceramic thin film formed by applying a sol-gel solution or slurry containing Cr 2 O 3 , SiO 2 or the like to the surface of the thermal spray coating 21 and then firing it. A large number of voids are formed on the surface and inside of the thermal spray coating 21, and a sealing coating 22 is formed to seal the voids of the thermal spray coating 21.
  • the thickness of the sealing film 22 is, for example, 1 to 50 ⁇ m. Providing such a sealing film 22 has an effect of eliminating the voids in the sprayed film 21 and improving the corrosion resistance.
  • the sealing film 22 is not essential, and the roll in the bath to be polished according to the embodiment may be one in which only the thermal sprayed film 21 is formed on the roll peripheral surface.
  • a plurality of grooves 10 are formed on the peripheral surface of the sink roll 6 at an equal pitch in the roll width direction.
  • the groove 10 according to the present embodiment is, for example, an annular groove formed linearly in the circumferential direction on the circumferential surface of the roll, and the extending direction of each groove 10 is perpendicular to the roll axis direction.
  • the groove 10 is a groove for discharging foreign matters such as dross from the roll peripheral surface
  • the shape of the groove 10 may be, for example, a curved groove.
  • the curved groove is a groove in which the bottom 12 and the top 14 of the groove 10 are curved in a smooth curved shape. That is, the cross-sectional shapes of the bottom portion 12 and the top portion 14 of the groove 10 that is a curved groove are smoothly curved curves.
  • the pitch p of the grooves 10 is 0.5 to 10 mm
  • the depth H of the grooves 10 (hereinafter referred to as the groove depth H) is 0.1 to 5 mm
  • the radii of curvature of the bottom 12 and the top 14 of the grooves 10 are.
  • R B, R T are both 0.1 ⁇ 5 mm.
  • the groove depth H is the height from the groove bottom 12a of the groove 10 (the deepest part of the groove bottom part 12) to the groove top 14a (the highest part of the groove top part 14).
  • the bottom 12 of the groove 10 (hereinafter referred to as the groove bottom 12) means a predetermined range on the bottom side of the groove 10 including the groove bottom 12a on the roll peripheral surface.
  • the top portion 14 of the groove 10 (hereinafter referred to as the groove top portion 14) means a predetermined range on the top side of the groove 10 including the groove top 14a on the roll peripheral surface.
  • the groove bottom 12 and the groove top 14 in the illustrated example are curved surfaces.
  • the intermediate portion 13 of the groove 10 (hereinafter referred to as the groove intermediate portion 13) is an intermediate region between the groove bottom portion 12 and the groove top portion 14 and constitutes both side surfaces of the groove 10.
  • the groove middle portion 13 in the illustrated example has a substantially flat inclined surface.
  • FIG. 4 is a cross-sectional view showing a polishing region of the groove 10 according to the present embodiment.
  • the roll peripheral surface in which the groove 10 according to the present embodiment is formed is divided into a non-contact area A1 and a contact area A2 from the viewpoint of whether or not the steel strip 2 comes into contact.
  • the non-contact region A1 is used when the steel strip 2 is plated using the continuous molten metal plating apparatus 1 (see FIG. 1) in which the roll 6 is installed in the plating bath 3 (that is, the continuous molten metal plating apparatus 1). It is a region that does not come into contact with the steel strip 2 on the roll peripheral surface of the roll 6 during operation.
  • the non-contact area A1 corresponds to the groove bottom part 12 and the groove intermediate part 13.
  • the contact area A ⁇ b> 2 is an area in contact with the steel strip 2 on the roll peripheral surface of the roll 6 during operation of the continuous molten metal plating apparatus 1.
  • This contact area A2 corresponds to the groove top 14.
  • the steel strip 2 traveling in the plating bath 3 is wound around the roll peripheral surface of the roll 6.
  • the steel strip 2 contacts the groove top 14 of the roll peripheral surface.
  • the groove bottom portion 12 and the groove intermediate portion 13 are not in contact with each other.
  • the roll peripheral surface (groove bottom portion 12 and groove intermediate portion 13) of the portion not in contact with the steel strip 2 is the non-contact region A1
  • the roll peripheral surface (groove top portion 14) of the portion in contact with the steel strip 2 is in contact. It is area A2.
  • the roll peripheral surface in which the groove 10 according to the present embodiment is formed is divided into a polishing region B1 and a non-polishing region B2 from the viewpoint of whether or not it is an object to be polished.
  • region B1 is an area
  • the non-polishing region B2 is a region of the roll peripheral surface that is not polished by the polishing wire.
  • the polishing region B1 includes at least the groove bottom portion 12, and the non-polishing region B2 includes at least the groove top portion 14.
  • the groove intermediate portion 13 may be included in either the polishing region B1 or the non-polishing region B2.
  • the ranges of the non-contact region A1, the contact region A2, the polishing region B1, and the non-polishing region B2 as described above are defined on the basis of the groove depth H, for example.
  • the non-contact area A1 is an area where the height from the groove bottom 12a is 0 or more and less than 0.9H on the roll peripheral surface.
  • the height of both ends of the non-contact area A1 from the groove bottom 12a is the same height (0.9H).
  • the contact area A2 is an area where the height from the groove bottom 12a is 0.9H or more and 1H or less on the roll peripheral surface.
  • the range of the non-contact region A1 is set to a range where the height from the groove bottom 12a is less than 0.9H.
  • the present inventors use a polishing wire of a polishing apparatus, which will be described later, to form the groove 10 of the roll 6.
  • the inner polishing region B1 was polished, and the roll 6 after polishing was applied to an actual machine of the continuous molten metal plating apparatus 1 to perform a test for measuring the life of the roll 6.
  • Roll diameter 1000mm
  • Roll rotation speed Average 32 rpm (100 m / min)
  • Steel strip width average 1500 mm x thickness 1 mm
  • Groove depth H 0.9 mm
  • Groove curvature radius R T 1mm
  • Groove bottom curvature radius R B 1.2 mm
  • FIG. 5 is a graph showing the relationship between the ratio k of the polishing region B1 occupying the non-contact region A1 and the life of the roll 6.
  • the roll life can be extended as the polishing area B1 occupying the non-contact area A1 is larger (that is, the ratio k of the polishing area B1 is larger).
  • the ratio k is 25%
  • the roll life is 13 days
  • the ratio k is 30%
  • the roll life is 37 days
  • the roll life increases rapidly. Therefore, by setting the ratio k of the polishing region B1 to 30% or more and 100% or less, adhesion of foreign matters to the groove 10 on the roll peripheral surface can be appropriately suppressed, and the roll life can be remarkably extended to about three times or more. Was confirmed.
  • the surface roughness of the groove 10 of the roll 6 according to this embodiment will be described in detail.
  • the index of surface roughness such as “arithmetic average roughness Ra” used in the following description is JIS standard “JIS B 0601: 2013” (corresponding to ISO 4287: 1997, Amendment 1: 2009) and “JIS B 0633”. : 2001 "(ISO4288: 1996).
  • the surface roughness was measured in accordance with ISO4287: 1997, ISO4288: 1996 using an apparatus manufactured by Taylor Hobson (Form Talysurf Intra). The groove top and groove bottom of the roll were measured in the circumferential direction. When it was difficult to directly measure the roll, a replica (molding with resin) was collected, and the collected replica was measured.
  • the groove 10 on the roll peripheral surface as described above has a function of discharging molten metal (for example, molten zinc) containing foreign matters such as dross from a contact portion between the roll 6 and the steel strip 2, and serves as a foreign matter discharge groove. Function. Even if the molten metal is caught between the steel strip 2 and the roll peripheral surface as the roll 6 rotates, the molten metal is discharged through the groove 10 formed on the roll peripheral surface. Furthermore, for example, if the groove 10 is a curved groove, a wider groove cross-sectional area can be ensured than the V-shaped groove, and the discharge function is further enhanced.
  • molten metal for example, molten zinc
  • the steel strip 2 is prevented from floating from the roll peripheral surface.
  • the surface pressure between the two can be ensured, and the slip of the steel strip 2 with respect to the sink roll 6 can be prevented.
  • the groove middle portion 13 is also an area where foreign matter such as dross can be attached, although not as much as the groove bottom portion 12. Therefore, from the viewpoint of preventing foreign matter from adhering to the groove intermediate portion 13, it is preferable to reduce the surface roughness of the groove intermediate portion 13.
  • the steel strip 2 comes into contact with the groove top 14 (contact area A ⁇ b> 2) of the groove 10 on the circumferential surface of the roll, but the grip force of the steel strip 2 by the groove top 14 is weak. Causes the steel strip 2 to slip. Therefore, from the viewpoint of preventing the steel strip 2 from slipping, it is preferable to ensure the grip strength of the steel strip 2 by appropriately increasing the surface roughness of the groove top portion 14.
  • At least the groove bottom portion 12 in the non-contact region A1 on the roll peripheral surface is set as the polishing region B1, and if necessary, the entire groove intermediate portion 13 or the groove bottom 12a. A part on the side is also defined as a polishing region B1.
  • at least the contact region A2 (groove top portion 14) is set as the non-polishing region B1, and if necessary, the entire groove intermediate portion 13 or a part on the groove top 14a side is also set as the non-polishing region B2. Then, only the polishing region B1 is locally polished and smoothed around the groove bottom portion 12 without polishing the contact region A2 in the roll peripheral surface.
  • Such a polishing process can reduce the surface roughness of the polishing region B1 without decreasing the surface roughness of the contact region A2. Accordingly, it is possible to suitably prevent foreign matters such as dross from adhering to and accumulating on the polishing region B1 centering on the groove bottom portion 12, and securing a grip force by the contact region A2 (groove top portion 14). The slip of the steel strip 2 can be prevented.
  • the polishing region B1 it is preferable to polish the polishing region B1 until the surface roughness of the polishing region B1 is less than 2 ⁇ m in Ra.
  • the adhesion force of foreign matters such as dross to the polishing region B1 of the groove 10 is sufficiently small, there is an effect of facilitating the falling off of the adhered matter.
  • the present invention is not limited to this example, and the surface roughness of the polished region B1 after polishing may be 2 ⁇ m or more in terms of Ra. Further, the surface roughness of the polished region B1 after polishing may be uniform or non-uniform.
  • the arrangement and shape of the grooves 10 are not limited to the examples of FIGS. 2 to 4 described above, and may be, for example, a cross-cut groove formed by combining grooves in a plurality of directions. Further, the cross-sectional shape of the groove 10 is not limited to the examples of FIGS.
  • FIGS. 6A to 6D and FIGS. 7A to 7D are cross-sectional views showing various modifications of the shape of the groove 10.
  • the shape of the groove 10 can be arbitrarily modified as long as the cross section of the non-contact region A1 is a curve or a curve and a straight line.
  • the cross-sectional shape of the contact region A2 (groove top portion 14) that becomes the non-polishing region B2 is not particularly limited, and may be an arbitrary shape constituted by a curve or a straight line.
  • the cross-sectional shape of the contact region A2 may be curved as shown in FIGS. 4 and 6A to 6D, or may be linear as shown in FIGS. 7A to 7D. Also good.
  • the groove 10 as a whole may be substantially V-shaped as shown in FIGS. 6A, 6B, and 7B. As shown in 7C, the groove 10 as a whole may be substantially U-shaped, or as shown in FIGS. 6D and 7D, the groove 10 as a whole may be substantially rectangular.
  • the shape of the groove 10 can be appropriately changed.
  • the range of the polishing region B1 occupying the non-contact region A1 can be changed by changing the reference height Hc of the polishing region B1.
  • the reference height Hc is the same, if the shape of the groove 10 is different, the range and the ratio k of the polishing region B1 are different.
  • polishing machine Next, a polishing apparatus for polishing the surface of the groove 10 in order to adjust the surface roughness of the groove 10 on the roll peripheral surface as described above will be described.
  • the polishing apparatus 30 polishes the groove 10 on the roll peripheral surface of the sink roll 6 by using the polishing wire 40, so that the surface of the groove 10 is centered on the groove bottom 12. It is to smooth.
  • the sink roll 6 is polished as a roll in the molten metal plating bath to be polished.
  • any other roll in the molten metal bath for example, the support rolls 7 and 8) may be used. It is also possible to polish.
  • the sink roll 6 is simply referred to as a roll 6.
  • the polishing apparatus 30 includes a base 31, a polishing wire 40, a support member 50 that supports the polishing wire 40, a moving mechanism 60 that moves the polishing wire 40 relative to the roll 6, and a roll shaft 6a.
  • the polishing wire 40 is an example of a polishing member
  • the rotation mechanism 70 is an example of a moving unit that relatively moves the polishing wire 40 that is an example of the polishing member and the roll peripheral surface of the roll 6.
  • the moving mechanism 60 and the rotating mechanism 70 are controlled by a controller (not shown) such as a computer.
  • the polishing wire 40 is a linear polishing tool formed of metal or resin and has a thickness that can be inserted into the groove 10.
  • a polishing wire 40 having an appropriate thickness is used according to the cross-sectional shape and curvature of the groove bottom 12 of the groove 10.
  • a granular abrasive may be fixed on the surface of the polishing wire 40 in advance, or loose abrasive grains may be supplied as a polishing point during polishing.
  • Such a polishing wire 40 is wound around the roll 6 at a predetermined winding angle ⁇ , inserted into the groove 10, and the roll 6 is rotated, whereby the polishing region B 1 can be polished around the groove bottom 12.
  • the diameter D of the polishing wire 40 (hereinafter referred to as the wire diameter D) is adjusted to a diameter that can be inserted into the groove 10. The details of the polishing wire 40 will be described later.
  • the support member 50 is disposed so as to face the peripheral surface of the roll 6, and a plurality of polishing wires 40 are tensioned in a direction parallel to the groove 10 (that is, a direction perpendicular to the roll axis). Support with. As shown in FIG. 8, the support member 50 according to the present embodiment supports the four polishing wires 40 at a predetermined pitch P at equal intervals.
  • the pitch P of the polishing wire 40 is a natural number multiple of the pitch p of the groove 10 (three times in the illustrated example). For example, when the pitch p of the groove 10 is narrow, the pitch P of the polishing wire 40 may be a plurality of times the pitch p.
  • the pitch P of the polishing wire 40 is It is good also as 1 time of this pitch p. Accordingly, the plurality of grooves 10 can be simultaneously polished by the plurality of polishing wires 40, and the polishing efficiency is improved.
  • the support member 50 includes a frame 51, a plurality of hooks 52 around which the polishing wire 40 is stretched, and a tension generating mechanism 53 that applies a constant tension to the polishing wire 40.
  • the frame 51 is a rectangular support frame for supporting the polishing wire 40 and is fixed to an upper frame 63 of the moving mechanism 60 described later.
  • a plurality of pairs of hooks 52 are provided on one side and the other side of the frame 51, and are disposed so as to protrude from the roll 6 side of the frame 51.
  • the polishing wire 40 is stretched between the hooks 52 and 52 at both ends of the frame 51, and the stretching direction of the polishing wire 40 and the axial direction of the roll 6 are perpendicular to each other.
  • the moving mechanism 60 relatively moves the polishing wire 40 and the roll 6 by moving the support member 50 that supports the polishing wire 40.
  • the moving mechanism 60 includes a lower frame 61 that moves in the roll axis direction (X direction) by the rotation of the ball screw 62 and an upper frame 63 that can slide in the Y direction with respect to the lower frame 61. These pedestals 61 and 63 are moved by a driving force such as a motor (not shown). The driving force of the motor or the like is controlled by a controller (not shown) such as a computer.
  • the moving mechanism 60 moves the polishing wire 40 and the support member 50 in the roll axis direction (X direction), thereby aligning the polishing wire 40 with the groove bottom 12 of the polishing region B1 of the groove 10 to be polished,
  • the polishing wire 40 can be sent out by the pitch p of the groove 10 in the roll axis direction (X direction) for each set of polishing processes.
  • the moving mechanism 60 moves the polishing wire 40 and the support member 50 in a direction (Y direction) to approach or separate from the roll peripheral surface, thereby pressing the polishing wire 40 against the groove 10 on the roll peripheral surface or the groove 10. And can be withdrawn from.
  • the polishing wire 40 is pressed against the polishing region B1 of the groove 10 on the roll peripheral surface as shown in FIG.
  • the roll is wound around the roll peripheral surface at a predetermined winding angle ⁇ .
  • the moving mechanism 60 is an example of a pressing unit that presses a polishing member such as the polishing wire 40 against the non-contact region A1 of the groove 10.
  • the moving mechanism 60 can also reciprocate (swing) the support member 50 in the roll axis direction (X direction) with the polishing wire 40 wound around the groove 10 of the roll 6.
  • X direction roll axis direction
  • B1 for example, the groove bottom part 12 and the groove intermediate part 13
  • the rotation mechanism 70 rotates the roll 6 around the roll shaft 6a.
  • the rotation mechanism 70 is installed on the base 31, and includes bearings 71 and 71 that support both ends of the roll shaft 6a, a motor that generates a driving force to rotate the roll shaft 6a, a rotational force transmission mechanism, and the like (not shown). ).
  • the motor, the rotational force transmission mechanism, and the like are controlled by a controller (not shown) such as a computer.
  • polishing wire 40 [4.2. Polishing wire] Next, the polishing wire 40 according to this embodiment will be described in detail.
  • the polishing wire 40 is composed of a wire strand and an abrasive disposed around the wire strand.
  • the abrasive may be fixed in advance around the wire strand by electrodeposition or adhesion with resin or the like, or may be fixed abrasive added as particles when manufacturing the strand, or polishing As a single material or a slurry mixed with a liquid, loose abrasive grains separately supplied to a processing point at the time of polishing may be used.
  • the abrasive is made of, for example, diamond, alumina, chromia, zirconia, silicon oxide, silicon carbide, silicon nitride, iron oxide, or a mixture thereof.
  • the particle size of the abrasive is, for example, 0.1 to 200 ⁇ m, particularly 30 to 40 ⁇ m.
  • the polishing wire 40 may be a single wire composed of one wire strand or a stranded wire obtained by twisting a plurality of wire strands.
  • FIGS. 10A and 10B are a front view and a cross-sectional view taken along line AA of the stranded wire polishing wire 40 according to the present embodiment.
  • a single polishing wire 40 is configured by twisting together a plurality of (for example, four) wire strands 41.
  • the wire strand 41 a commercially available diamond wire etc. can be used, for example.
  • the wire diameter D of the polishing wire 40 is larger than each wire strand diameter d (D> d).
  • the stranded wire as the polishing wire 40 as described above has the following effects. First, since the contact location between each wire element 41 and the surface of the groove 10 of the roll 6 can be changed in the circumferential direction of the processed portion, the surface of the groove 10 can be uniformly polished. Further, when attaching the polishing wire 40 to the hook 52 of the support member 50, the bending flexibility of the polishing wire 40 can be enhanced. Furthermore, the stranded wire polishing wire 40 has high followability to the curvature of the roll 6, the shape of the groove 10, the pitch p of the groove, and the like, so the efficiency and uniformity of the polishing process of the groove 10 can be improved.
  • the polishing processing range (width of the polishing region B ⁇ b> 1) on the surface of the groove 10 can be adjusted. It is also possible to adjust the polishing range by adjusting the wire diameter d, the number of the wire strands 41, or a combination thereof. For example, if the number of the wire strands 41 is increased and the wire diameter D of the polishing wire 40 is increased, not only the groove bottom portion 12 but also the groove intermediate portion 13 can be easily polished.
  • FIGS. 11A to 11D are cross-sectional views showing a strand wire polishing wire 40 and a groove 10 according to a modification of the present embodiment.
  • the polishing wire 40A in which the number of wire strands 41A is increased to 6 the polishing region B1 including not only the groove bottom portion 12 but also the groove intermediate portion 13 can be polished.
  • the polishing wire 40B with the number of wire strands 41B increased to 10 the upper side of the groove intermediate portion 13 near the groove top portion 14 can also be polished, and the polishing region B1 is defined.
  • the entire area of the non-contact area A1 can be set. In the example of FIGS.
  • the cross-sectional shape of the polishing wires 40 ⁇ / b> A and 40 ⁇ / b> B is changed to the cross-sectional shape of the groove 10 by pressing the polishing wires 40 ⁇ / b> A and 40 ⁇ / b> B obtained by twisting a large number of wire strands 41 against the groove 10.
  • the shape changes from a circle to a substantially inverted triangle. For this reason, it is possible to appropriately polish the polishing region B1 including both the groove bottom portion 12 and the groove intermediate portion 13 with the groove bottom portion 12 as the center.
  • the condition of “D ⁇ 2 ⁇ R B ” may not be satisfied.
  • the wire strand 41 of the polishing wire 40 can be brought into contact with the groove bottom 12 as long as the condition of “d ⁇ 2 ⁇ R B ” is satisfied. Can be polished properly.
  • the flexibility and followability of the polishing wire 40C can be improved, and the polishing region B1 of the groove bottom portion 12 can be further increased. It can be polished properly and uniformly.
  • the polishing wire 40D which has arrange
  • the polishing range (polishing region B1) and processing accuracy of the groove 10 are flexibly changed by adjusting the number of wire strands 41 forming the polishing wire 40, the strand diameter d, the twisting method, and the like. be able to.
  • the wire diameter D of the single wire polishing wire 40 it is necessary to manufacture a custom-made product, which increases the cost. Since the wire diameter D can be adjusted by adjusting the diameter d and the like, the polishing wire 40 having a desired specification corresponding to the shape and processing accuracy of the groove 10 can be manufactured at low cost.
  • FIG. 12 is a rear view showing the support member 50 of the polishing wire 40 according to this embodiment.
  • FIG. 13 is a front view showing the support member 50 and the roll 6 of the polishing wire 40 according to this embodiment.
  • the support member 50 supports a plurality of polishing wires 40 in a state of being tensioned in a direction parallel to the groove 10, and the plurality of polishing wires 40 are fixed at a constant pitch. P is supported at equal intervals and in parallel.
  • the support member 50 includes a hollow rectangular frame 51, a plurality of hooks 52 disposed opposite to both sides of the back surface of the frame 51, and tension generation provided in association with the hooks 52 on one end side of the frame 51.
  • a mechanism 53 and a fixing member 54 for fixing the polishing wire 40 are provided.
  • the hook 52 is a member for suspending the polishing wire 40, and a portion (contact portion) where the hook 52 contacts the polishing wire 40 is curved with a predetermined curvature. For this reason, the polishing wire 40 suspended from the hook 52 is curved along the hook 52 with the predetermined curvature and is turned 180 °.
  • a plurality of pairs of hooks 52 are arranged to face one side and the other side of the back surface of the frame 51 (upper and lower sides of the frame 51 in the example of FIG. 12). At this time, the hooks 52 are arranged in a staggered manner on one side and the other side of the back surface of the frame 51.
  • the polishing wire 40 is stretched between the hook 52 on the one side and the hook 52 on the other side, and the one side and the other are arranged so that the polishing wire 40 is stretched in a direction parallel to the groove 10.
  • the shape and arrangement of the side hooks 52, 52 are adjusted.
  • fixing hooks 52a are disposed at both lower corners of the back surface of the frame 51, respectively.
  • a single polishing wire is suspended so as to meander with respect to the hook 52, and both ends thereof are fixed to fixing hooks 52a, so that the plurality of polishing wires 40 are arranged at a predetermined pitch between the hooks 52. It will be stretched in parallel with P.
  • the operator can easily and quickly attach the polishing wire 40 to the support member 50 of the polishing apparatus 30, and the working time can be shortened.
  • the effect of improving the work efficiency increases as the number of polishing wires 40 in one support member 50 increases.
  • the method of attaching the polishing wire 40 is not limited to the above example, and the ends of the plurality of polishing wires 40 may be attached to the hooks 52, respectively.
  • the tension generating mechanism 53 As shown in FIG. 12, the tension generating mechanism 53 is mounted on one side of the back surface of the frame 51 together with the hook 52.
  • the tension generating mechanism 53 includes an air cylinder, a leaf spring, or the like, and applies a unidirectional and constant tensile force to the hook 52.
  • the tension generating mechanism 53 supports the hook 52 and pulls the hook 52 in the direction in which the plurality of polishing wires 40 suspended from the hook 52 are stretched (upward in the illustrated example).
  • the tension generating mechanism 53 can generate a constant tension T on the plurality of polishing wires 40, the polishing wire 40 in a moderately tensioned state is pressed against the grooves 10 during polishing of the grooves 10. be able to. Accordingly, the polishing region 40 of the groove 10 can be locally and accurately polished by the polishing wire 40, and uniform polishing can be performed.
  • the tension generating mechanism 53 is provided on one side of the frame 51 as described above, and the fixing member 54 for fixing the polishing wire 40 is provided on the other side of the frame 51.
  • the fixing member 54 is configured by a presser plate that presses and fixes a plurality of polishing wires 40 to and from the frame 51.
  • the fixing member 54 can fix both ends of the polishing wire 40 suspended on the hook 52 on one side of the frame 51 on the lower side of the frame 51, so that the polishing wire 40 suspended on the hook 52 is displaced. Can be prevented. Therefore, even if a variation in the tension T occurs in a certain polishing wire 40 due to a difference in frictional force between the polishing wire 40 and the groove 10 or a difference in the amount of the polishing wire 40 pushed into the groove 10 during polishing, It is possible to prevent the fluctuation of T from being transmitted to the other polishing wire 40. Therefore, since the tension generating mechanism 53 and the fixing member 54 can keep the uniform tension T applied to the plurality of polishing wires 40 during the polishing process, the plurality of grooves 10 are uniformly polished. It becomes possible.
  • the pitch P of the polishing wire 40 is defined by the ratio (P / d) between the pitch P and the wire diameter d. Regardless of whether the polishing wire 40 is a single wire or a stranded wire, the ratio (P / d) between the pitch P and the wire diameter d is preferably 5 or more and 10,000 or less.
  • FIGS. 14A to 14C are front views showing a modification of the hook 52 according to the present embodiment.
  • the curvature (R) of the contact portion of the hook 52 that contacts the polishing wire 40 satisfies the condition “R ⁇ 2.5d” corresponding to the above condition (P / d is 5 or more). If it is satisfied, the shape and the number of the hooks 52 are not limited to the elliptical example as shown in FIG. 12 and can be variously changed.
  • the polishing wire 40 may be suspended from a circular hook 52A, or as shown in FIG. 14B, the polishing wire 40 may be suspended from two circular hooks 52B. Good. Further, as shown in FIG. 14C, the polishing wire 40 may be suspended from an oval hook 52C.
  • FIG. 15 is a front view showing the support member 50 including the spacer 55 according to the present embodiment.
  • the polishing wire 40 is composed of a high-hardness wire such as a diamond wire so that the hard sprayed coating 21 can be locally polished. For this reason, if the polishing wire 40 is simply suspended on the hook 52, the polishing wire 40 may swell in the pitch direction (roll axis direction X) around the hook 52 as shown in FIG. When the polishing wire 40 swells and loses straightness in this way, the pitch P of the polishing wire 40 becomes non-uniform, which causes variations in the polishing pitch and makes it impossible to properly polish a desired position in the groove 10. There is a fear.
  • a spacer 55 for correcting the bulge of the polishing wire 40 is installed between the hooks 52, 52 adjacent to each other in the roll axis direction on the upper back side of the frame 51.
  • the width of the spacer 55 in the roll axis direction X is substantially the same as the pitch P of the polishing wire 40, and the thickness of the spacer 55 is larger than the deformation amount of the polishing wire 40 in the Y direction.
  • the planar shape of the spacer 55 is, for example, an elliptical shape, but may be a circular shape or a rectangular shape.
  • the bulge of the polishing wire 40 generated around the hook 52 can be corrected so as to be deflated. Accordingly, the straightness of the plurality of polishing wires 40 can be ensured, and the plurality of polishing wires 40 can be arranged at regular intervals with a constant pitch P. Therefore, the accuracy of the polishing position by the polishing wires 40 can be improved.
  • polishing wire tension Next, with reference to FIG. 16, the tension T of the polishing wire 40 according to this embodiment will be described in detail.
  • the pressing force of the polishing wire 40 against the groove 10 of the roll 6 is determined by the tension T of the polishing wire 40 stretched by the support member 50. As the tension T of the polishing wire 40 increases, the pressing force of the polishing wire 40 against the groove 10 increases, and the polishing processing speed of the groove 10 increases.
  • the tension T of the polishing wire 40 is preferably 5N or more and 30N or less.
  • the tension T is less than 5N, the polishing wire 40 does not follow the curved shape of the roll peripheral surface, and the contact with the groove 10 becomes non-uniform. Uneven polishing will occur.
  • the tension T is more than 30 N, the polishing process speed is excessively high, so that uneven polishing process occurs in the groove 10 due to variations in the polishing process time.
  • the tension T is in the range of 5 to 30 N, the polishing wire 40 can be uniformly pressed against the groove 10 on the roll peripheral surface with an appropriate pressing force. 10 can be polished, and the occurrence of uneven polishing can be prevented.
  • FIG. 16 is a graph showing the relationship between the tension T of the polishing wire 40 and the polishing unevenness in this test.
  • FIG. 16 shows the ratio between the measured value of the surface roughness of the actually polished groove bottom 12 and the target surface roughness (hereinafter referred to as the roughness ratio) on the vertical axis as an index representing the polishing unevenness. .
  • the roughness ratio varies in the range of 0.83 to 1.55. Even when the tension T is 31 N, the roughness ratio varies in the range of 0.52 to 1.35. This indicates that unevenness in the polishing process occurs because the tension T is not appropriate.
  • the tension T is 10N, 15N, 20N, 25N, and 30N, the roughness ratio is within the range of 0.81 to 1.15, the variation is small, and the roughness ratio is 1 Concentrated around 0. Therefore, it was confirmed that by setting the tension T within the range of 5N to 30N, the surface roughness of the groove bottom 12 after polishing can be brought close to the target roughness, and uneven polishing can be suppressed.
  • polishing conditions by the polishing apparatus 30 include the following.
  • the surface roughness of the polishing region B1 can be appropriately adjusted so as to be in the numerical range described above.
  • Rotation speed R of roll 6 1 to 400 rpm
  • Polishing time t of one groove 10 1 to 1200 s
  • Winding angle of polishing wire 40 1 to 180 °
  • Particle size r of abrasive 0.1 to 200 ⁇ m
  • Diameter D of polishing wire 40 0.01 to 2 ⁇ R B mm (R B : radius of curvature of groove bottom 12)
  • the rotation speed R of the roll 6 is less than 1 rpm, polishing cannot be performed in an economical processing time.
  • the rotational speed R is more than 400 rpm, the polishing processing speed is too high, so that polishing processing unevenness due to variations in polishing processing time occurs.
  • the rotation speed R of the roll 6 is preferably 1 to 400 rpm. As a result, it is possible to prevent unevenness in the polishing process by suppressing variations in the polishing process time while polishing with an economical processing time.
  • the polishing time t when polishing one groove 10 with the polishing wire 40 is less than 1 s, the polishing processing speed is too high, resulting in uneven polishing due to variations in the polishing time.
  • the polishing time t exceeds 1200 s, the polishing cannot be performed in an economical processing time. Accordingly, the polishing time t is preferably 1 to 1200 s. Thus, polishing processing can be performed in an economical processing time while suppressing variations in polishing processing time and preventing uneven polishing.
  • the winding angle ⁇ of the polishing wire 40 with respect to the groove 10 of the roll 6 is less than 1 °, the contact area between the polishing wire 40 and the groove bottom 12 is too small, resulting in uneven polishing.
  • the winding angle ⁇ exceeding 180 ° cannot be realized due to the structure of the support member 50 and the like of the polishing apparatus 30.
  • the winding angle ⁇ of the polishing wire 40 is preferably 1 to 180 °.
  • the particle size r of the abrasive is less than 0.1 ⁇ m, the polishing power by the polishing wire 40 is insufficient, and the polishing cannot be performed in an economical processing time.
  • the particle size r of the abrasive is more than 200 ⁇ m, the surface roughness of the groove 10 polished by the polishing wire 40 becomes larger than the required roughness (for example, Ra is less than 2 ⁇ m). Therefore, the particle size r of the abrasive is preferably 0.1 to 200 ⁇ m. Thereby, the polishing power of the polishing wire 40 can be ensured and polishing can be performed in an economical processing time, and a desired surface roughness of the groove 10 can be obtained.
  • the polishing wire 40 may be disconnected due to wear or the like during the polishing process, and uneven polishing may occur.
  • the wire diameter D is 2 ⁇ R B mm exceeded, the radius of the polishing wire 40 is greater than the radius of curvature R B of the groove bottom portion 12, polishing the wire 40 is not suitably contacting the curved surface of the groove bottom 12 It becomes difficult to polish the groove bottom 12 with the polishing wire 40.
  • the wire diameter D is preferably 0.01 to 2 ⁇ R B mm. Thereby, the groove bottom 12 can be appropriately polished while suppressing disconnection of the polishing wire 40 during polishing.
  • the sectional shape of the abrasive wire 40 as described above are possible deformation (see FIG. 11A ⁇ 11D.),
  • the wire wire diameter d is 0.01 ⁇ 2 ⁇ R B mm is, D ⁇ 2 ⁇ even R was B, and can be appropriately polished groove bottom 12.
  • the slurry in which the abrasive and the polishing liquid (lubricant) are mixed may be processed while being supplied to the processing part, or may be processed without lubrication without supplying the polishing liquid. May be.
  • 17 and 18 are a plan view and a cross-sectional view showing the swinging operation of the polishing wire 40 according to this embodiment.
  • the moving mechanism 60 of the polishing apparatus 30 reciprocates (swings) the support member 50 in the roll axis direction (width direction of the groove 10: X direction).
  • the polishing wire 40 inserted into the groove 10 can be reciprocated in the roll axis direction (X direction) together with the support member 50.
  • the polishing wire 40 swings along the surface of the groove 10 around the groove bottom portion 12 in the groove 10 and is rubbed against the surfaces of the groove bottom portion 12 and the groove intermediate portion 13.
  • a wide polishing region B1 including the groove intermediate portion 13 can be easily polished.
  • FIG. 17 shows a case where the entire contact portion of the polishing wire 40 with respect to the groove 10 is translated in the width direction (X direction) of the groove 10 in accordance with the reciprocal movement of the support member 50.
  • the moving mechanism 60 moves the polishing wire 40 in the width direction (X direction) of the groove 10. And reciprocally move in the depth direction (Y direction) of the groove 10.
  • FIG. 18 shows that the center portion of the contact portion of the polishing wire 40 with respect to the groove 10 does not move in accordance with the reciprocation of the support member 50, and only the polishing wire 40 at both ends of the contact portion has a width of the groove 10.
  • a case of parallel movement in the direction (X direction) is shown.
  • the winding angle ⁇ is large, the depth H of the groove 10 is deep, the tension T is low, and the wire strand diameter d is small, the moving wire 60 moves the polishing wire 40 in the width direction (X direction) of the groove 10. Simply reciprocate. Thereby, as shown in FIG. 18, only the both end portions of the contact portion of the polishing wire 40 reciprocate along the surface of the groove 10.
  • the polishing region B1 including part or all of the groove bottom portion 12 and the groove intermediate portion 13 is locally polished and smoothed on the roll peripheral surface, and the surface roughening is performed.
  • the degree can be reduced.
  • region B1 may be in the numerical range mentioned above (for example, Ra is 2 micrometers or less) with a simple method.
  • the polishing wire 40 in which a plurality of wire strands 41 are twisted together when used, the polishing wire 40 does not have to be reciprocated in the groove 10 as shown in FIGS. 11A to 11D.
  • the groove intermediate portion 13 can be polished. That is, by using twisted wire of small radius wire strand 41 than the radius of curvature R B of the groove bottom 12, the polishing area wire strands 41 of the plurality of comprises a groove bottom 12 and the groove intermediate portion 13 B1 Since these are in contact with each other, these ranges can be polished simultaneously.
  • FIG. 19 is a flowchart showing the polishing method according to the present embodiment.
  • the polishing apparatus 30 (see FIG. 8, etc.) according to this embodiment performs one set of polishing operation for simultaneously polishing the surface of the plurality of grooves 10 using a plurality of polishing wires 40. Then, a plurality of polishing wires 40 are fed out in the roll axis direction by the pitch p of the groove 10 and the polishing operation of the next set of the plurality of grooves 10 is repeated, whereby all the grooves 10 on the roll peripheral surface are polished.
  • the plurality of polishing wires 40 are aligned with the first set of grooves 10 to be polished first (S2). Specifically, as shown in FIG. 8, a plurality of polishing wires 40 and a support member 50 are arranged so as to face the peripheral surface of the roll 6, and the plurality of polishing wires 40 are arranged in a first set of a plurality of strips.
  • the groove 10 is aligned with the groove bottom 12 of the groove 10 in the width direction of the groove 10.
  • the polishing region B1 of the plurality of grooves 10 is simultaneously polished using the plurality of polishing wires 40 (S4).
  • the polishing wire 40 and the support member 50 are advanced in the Y direction toward the peripheral surface of the roll 6 by the moving mechanism 60,
  • the polishing wire 40 is inserted into each groove 10 and wound around the groove bottom 12 at a predetermined winding angle ⁇ .
  • each wound polishing wire 40 is continuously in contact with the entire circumference of the polishing region B1 of each groove 10 of the rotating roll 6.
  • the plurality of polishing wires 40 rub simultaneously with the polishing region B1 of the four grooves 10 of the rotating roll 6, so that the polishing region B1 of the plurality of grooves 10 is simultaneously polished.
  • a thick polishing wire 40 that matches the width of the polishing region B1 is used, or the polishing wire 40 is moved in the width direction (X direction) of the groove 10.
  • a wide polishing region B1 including not only the groove bottom portion 12 but also the groove intermediate portion 13 can be polished.
  • the sealing coating 22 in the polishing region B1 and the thermal spray coating 21 below the polishing region B1 are polished around the groove bottom portion 12, and the surface of the thermal spray coating 21 in the polishing region B1 is a desired surface. Smoothed to roughness.
  • the polishing wire 40 and the support member 50 are retracted in the Y direction by the moving mechanism 60 and separated from the peripheral surface of the roll 6. Further, the moving mechanism 60 feeds the polishing wire 40 and the support member 50 in the roll axis direction (X direction) by the pitch p of the grooves 10, and a plurality of the polishing wires 40 and the support members 50 are supplied to the groove bottom portions 12 of the next plurality of grooves 10.
  • the polishing wire 40 of the book is aligned (S2).
  • the polishing region B1 of the plurality of grooves 10 in the second set is simultaneously polished using the plurality of polishing wires 40 (S4). Then, until the polishing of all the grooves 10 on the roll peripheral surface is completed (S6), the polishing operation (S2, S4) is repeated a plurality of times, thereby simultaneously polishing the grooves 10 on the roll peripheral surface by the number of polishing wires 40. I will do it.
  • the polishing region B1 of the numerous grooves 10 formed on the peripheral surface of the roll 6 can be efficiently polished in a short time.
  • the grooves 10 are polished one by one with a grindstone or the like as in the conventional polishing method (processing time 1 minute / 1 The groove 10) required a polishing time of 13 hours or more.
  • the polishing apparatus 30 provided with, for example, 15 polishing wires 40 is used, the polishing process time is about 1 hour.
  • the polishing wire 40 of the polishing apparatus 30 according to the present embodiment is excellent in local polishing performance, and has a wire diameter D corresponding to the width and shape of the groove 10. Then, the polishing wire 40 is stretched by the support member 50 in a state where it is tensioned with a constant tension T, and is pressed so as to be wound around the groove 10 of the roll 6 at a predetermined winding angle ⁇ .
  • polishing wire 40 As a polishing tool, only the polishing region B1 centered on the groove bottom 12 in the surface of the groove 10 can be locally and appropriately polished. Therefore, not only the relatively soft sealing film 22 in the uppermost layer but also the relatively hard sprayed film 21 in the lower layer can be suitably polished with the polishing wire 40 at the groove bottom 12. Therefore, the sprayed coating 21 itself of the groove bottom 12 that cannot be smoothed by a conventional polishing method such as buffing can be appropriately polished and smoothed, and the surface roughness of the sprayed coating 21 of the groove bottom 12 can be set to a desired surface. The roughness can be adjusted (for example, Ra is 0.001 to 2 ⁇ m).
  • FIG. 20 is a flowchart showing a method for manufacturing a roll in a molten metal plating bath according to this embodiment.
  • the sink roll 6 is manufactured as a roll in bath
  • the same manufacturing method may be used when manufacturing other rolls in the bath (for example, support rolls 7 and 8).
  • martensitic stainless centrifugal cast material or forged material is used as the base material of the roll in the bath.
  • the unevenness of the roll surface in the bath is cut by pressing tool steel or cemented carbide cutting tool processed into a desired uneven shape onto the roll surface.
  • a plurality of grooves 10 are formed in the circumferential direction on the peripheral surface of the roll base 20 that is the base of the roll 6 (step S10).
  • this grooving for example, lathe processing or cutting using a cutting tool can be used.
  • a thermal spray coating 21 is formed by spraying a thermal spray material on the peripheral surface of the roll base material 20 in which the groove 10 is formed (step S12).
  • the thermal spray material such as cermet is collided and adhered to the peripheral surface of the roll base 20 at a high speed.
  • the sprayed coating is subjected to grid blasting to improve adhesion, followed by high-velocity gas spraying (called High Velocity Oxygen-Fuel Thermal Spraying Process, HVOF), plasma spraying, explosive spraying (called Detonation Gun Process, D-gun). Etc. under normal spraying conditions.
  • HVOF High Velocity Oxygen-Fuel Thermal Spraying Process
  • the fuel gas is either kerosene, C3H8, C2H2, or C3H6
  • the fuel gas pressure is 0.1 to 1 MPa
  • the fuel gas flow rate is 10 to 500 l / min
  • the oxygen gas pressure is Is preferably 0.1 to 1 MPa
  • the flow rate of oxygen gas is preferably 100 to 1000 l / min.
  • the particle size of the raw material powder of these sprayed coatings is preferably 10 to 50 ⁇ m. Only one layer of the thermal spray coating may be formed, or a plurality of thermal spray coatings may be formed of the same or different materials.
  • the thickness of the ceramic sprayed coating is usually in the range of 20 to 200 ⁇ m, and the thickness of the cermet sprayed coating is in the range of 20 to 300 ⁇ m.
  • the polishing region B1 in the surface of the groove 10 is locally polished and smoothed (step S14). . Accordingly, the surface roughness of the polishing region B1 (the groove bottom portion 12 and the groove intermediate portion 13) is reduced without changing the surface roughness of the contact region A2 (groove top portion 14) with respect to the steel strip 2.
  • the polishing region B1 of the relatively hard sprayed coating 21 can be appropriately polished and smoothed by the polishing wire 40 having a high local polishing ability.
  • the groove 10 is formed so that the final target surface roughness can be obtained after the sealing process (S16).
  • the surface roughness of the thermal spray coating 21 in the polishing region B1 is adjusted. If the sealing treatment (S16) is not performed, the surface roughness of the sprayed coating 21 in each part of the groove 10 may be adjusted to the final target surface roughness in the main polishing step (S14).
  • the target surface roughness of the groove 10 is as described above.
  • the thermally sprayed coating 21 after the polishing is subjected to sealing treatment to form a sealed coating 22 (uppermost layer coating) on the surface of the sprayed coating 21 (step S16).
  • an oxide film forming process is performed to obtain an oxide layer made of one or more of chromium, silica, zirconia, and alumina as the sealing film.
  • the sealing film is formed by applying and baking a sealing material. Specifically, a sealing material (such as a sol-gel solution or a slurry) containing Cr 2 O 3 , SiO 2 or the like is applied to the surface of the sprayed coating 21 and then baked.
  • the pores contained in the thermal spray coating 21 are covered with the sealing coating 22, and the gaps in the thermal spray coating 21 are sealed.
  • the thickness of the sealing film is usually 1 to 50 ⁇ m. Since the sealing film is thinner than the thermal spray coating roughness (Rz several tens to several hundreds ⁇ m), the surface roughness after thermal spraying and sealing treatment is greatly affected by the thermal spray coating roughness.
  • the roll 6 in which the surface roughness of the groove 10 on the peripheral surface of the roll is different between the contact area A2 and the polishing area B1 can be manufactured easily and appropriately.
  • the polishing process (S14) of the groove 10 with the polishing wire 40 is performed to adjust the surface roughness of the groove 10, but the embodiment is limited to this example.
  • the groove 10 may be polished by the polishing wire 40, or after forming the sprayed film 21 (S12) and forming the sealing film 22 (S16). You may perform the grinding
  • the roll in the molten metal plating bath and the manufacturing method thereof according to the embodiment have been described.
  • the entire surface of the groove 10 on the peripheral surface of the roll is not smoothed and the surface roughness is lowered, but the non-contact region A1 (the groove bottom 12 and the groove) in which foreign matter adhesion may occur using the polishing wire 40.
  • Only the polishing region B1 in the intermediate portion 13) is locally polished and smoothed to partially reduce the surface roughness and not to reduce the surface roughness of the groove top portion 14 in contact with the steel strip 2.
  • the contact region A2 (groove top portion 14: for example, a height position of 0.9H or more from the groove bottom 12a) in which the grip force of the steel strip 2 is almost not required is polished. Without applying, a certain degree of surface roughness (for example, 3 to 80 ⁇ m in Ra) is secured. On the other hand, for the polishing region B1 in the non-contact region A1 including the groove bottom portion 12 and the groove middle portion 13 where the foreign matter adheres sharply, the surface roughness is reduced to less than 2 ⁇ m by Ra.
  • the surface roughness of the groove bottom portion 12 is sufficiently low, so that foreign matter such as dross is sufficiently adhered to the polishing region B around the groove bottom portion 12. Can be suppressed. Further, when the groove intermediate portion 13 is also included in the polishing region B, it is possible to accurately suppress the adhesion of foreign matters such as dross to the groove intermediate portion 13.
  • the surface roughness of the groove top part 14 which is the contact area A2 is high to some extent, the frictional force against the steel strip 2 can be increased, and the grip force of the steel strip 2 by the groove top part 14 can be secured. Therefore, it is possible to prevent the steel strip 2 from slipping with respect to the peripheral surface of the in-bath roll during operation of the continuous molten metal plating apparatus 1.
  • the surface roughness of the groove 10 on the peripheral surface of the bath roll such as the sink roll 6 or the support rolls 7 and 8 is appropriately adjusted according to the depth.
  • the adhesion of foreign matter such as dross to the non-contact area A1 can be greatly reduced, and the grip force of the steel strip 2 by the non-contact area A2 (groove top 14) can be secured.
  • adhesion of foreign matters such as dross to the grooves 10 on the circumferential surface of the roll in the bath can be sufficiently suppressed, and the steel strip 2 can be prevented from slipping. Therefore, it is possible to extend the life of the roll in bath without deteriorating the conveyance performance of the roll in bath.
  • the comparatively hard sprayed coating 21 can be appropriately polished using the polishing wire 40. Therefore, not only the sealing film 22 on the roll peripheral surface but also the thermal spray coating 21 below the sealing film 22 can be appropriately polished to adjust the surface roughness of the groove bottom 12.
  • the sealing film 22 is not essential on the roll peripheral surface. Therefore, the roll having no sealing film 22 can adjust the surface roughness of the groove 10 and the material of the sealing film 22 is not limited to a material that can be removed by buffing. is there. Further, since the sprayed coating 21 itself in the polishing region B can be polished and smoothed, even if the sealing coating 22 is removed by the work of scraping off the dross in the groove 10 and the underlying sprayed coating 21 appears. Since the thermal spray coating 21 itself is smoothed to a desired surface roughness, the surface roughness of the polishing region B does not increase.
  • the example of the sink roll 6 is described as the roll in the molten metal plating bath, but the embodiment is not limited to such an example.
  • the roll in the molten metal plating bath of the embodiment can be applied to, for example, the support rolls 7 and 8 and the like, and in addition to any roll in the bath installed in the molten metal plating bath. Applicable.
  • a polishing wire is used as a polishing member for mechanically and selectively polishing a non-contact region in the groove 10, but a rod-shaped tool such as a diamond bar, a disk-shaped tool such as a diamond cutter, or the like is used. Also good.
  • the advantage of using a wire tool such as a polishing wire over the case of using these tools is that the wire tool has a large contact area, and therefore can be processed uniformly and in a short time. It should be noted that when a bar-shaped tool such as a diamond bar, a disk-shaped tool such as a diamond cutter, or a wire tool such as a polishing wire is pressed against a non-contact region in the groove 10, these tools are set so that the pressing force is constant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Coating With Molten Metal (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

L'invention concerne un appareil de polissage pour un rouleau, qui doit être immergé dans un bain de placage de métal en fusion, sur lequel de multiples rainures sont formées sur la surface circonférentielle du rouleau, et qui doit être utilisé lors de la mise en contact d'une bande de métal avec la surface circonférentielle du rouleau dans le métal en fusion dans un bain de placage tout en fournissant continuellement un métal dans le métal en fusion dans le bain de placage pour plaquer la bande de métal. L'appareil de polissage est doté d'un moyen de chargement permettant de charger un moyen de polissage pour le polissage sélectif et mécanique d'au moins une partie d'une région de non-contact, qui n'entre pas en contact avec la bande de métal et qui est plus proche du fond de la rainure que la région de contact de la surface circonférentielle du rouleau qui est en contact avec la bande de métal dans le métal en fusion dans le bain de placage.
PCT/JP2015/066404 2014-06-10 2015-06-05 Appareil de polissage, procédé de polissage et procédé de fabrication de rouleau devant être immergé dans un bain de placage de métal en fusion WO2015190419A1 (fr)

Priority Applications (2)

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JP2016527785A JP6274312B2 (ja) 2014-06-10 2015-06-05 研磨加工装置、研磨加工方法および溶融金属めっき浴中ロールの製造方法
CN201580030504.0A CN106413988B (zh) 2014-06-10 2015-06-05 研磨加工装置、研磨加工方法以及热浸镀液中辊的制造方法

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JP2014-119756 2014-06-10
JP2014119756 2014-06-10

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JP6262720B2 (ja) 2013-03-27 2018-01-17 テイ・エス テック株式会社 乗物用シート
CN111433384B (zh) * 2017-12-05 2021-03-19 日本制铁株式会社 熔融金属镀浴中辊及熔融金属镀浴中辊的制造方法
CN109778093A (zh) * 2019-03-18 2019-05-21 马鞍山钢铁股份有限公司 沉没辊及其制造方法
CN112708846A (zh) * 2020-12-22 2021-04-27 安徽工业大学 耐熔融AlSi腐蚀的稀土氧化物改性MoB-CoCr梯度涂层及其制备方法

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JPH0243165U (fr) * 1988-09-14 1990-03-26
JPH04308069A (ja) * 1991-04-02 1992-10-30 Nkk Corp ロ−ル自動研磨装置
JPH09111431A (ja) * 1995-10-20 1997-04-28 Sumitomo Metal Ind Ltd 溶融金属めっき設備におけるトップロール手入れ装置
JP2005206878A (ja) * 2004-01-22 2005-08-04 Kobe Steel Ltd めっき浴用ロール

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Publication number Priority date Publication date Assignee Title
US4044509A (en) * 1974-07-05 1977-08-30 U.S. Philips Corporation Method of and device for grinding grooves
FR2764225B1 (fr) * 1997-06-05 1999-07-23 Uranie International Piece metallique ayant une surface externe presentant un profil particulier, procede de polissage pour sa realisation et dispositif de mise en oeuvre du procede
CN1202406A (zh) * 1997-06-12 1998-12-23 赵钦锋 充气磨光机

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Publication number Priority date Publication date Assignee Title
JPH0243165U (fr) * 1988-09-14 1990-03-26
JPH04308069A (ja) * 1991-04-02 1992-10-30 Nkk Corp ロ−ル自動研磨装置
JPH09111431A (ja) * 1995-10-20 1997-04-28 Sumitomo Metal Ind Ltd 溶融金属めっき設備におけるトップロール手入れ装置
JP2005206878A (ja) * 2004-01-22 2005-08-04 Kobe Steel Ltd めっき浴用ロール

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