WO2009084148A1 - Roller for machining metal foil - Google Patents
Roller for machining metal foil Download PDFInfo
- Publication number
- WO2009084148A1 WO2009084148A1 PCT/JP2008/003428 JP2008003428W WO2009084148A1 WO 2009084148 A1 WO2009084148 A1 WO 2009084148A1 JP 2008003428 W JP2008003428 W JP 2008003428W WO 2009084148 A1 WO2009084148 A1 WO 2009084148A1
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- WIPO (PCT)
- Prior art keywords
- metal foil
- roller
- processing roller
- foil processing
- metal
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/227—Surface roughening or texturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
Definitions
- the present invention relates to a metal foil processing roller. More specifically, the present invention mainly relates to an improvement of a metal material constituting a metal foil processing roller having a plurality of recesses formed on the surface.
- a plating method, an etching method, or the like is generally used in order to form a convex portion on the surface of a metal foil having a thickness of several tens of microns.
- a plating method, an etching method, or the like is generally used in order to form several tens to several hundreds of convex portions having a size of a micron unit per 1 cm 2 of the surface of the metal foil.
- precision processing having many steps is performed and complicated operations are performed. Is necessary and takes a long time. Nevertheless, the defective product rate cannot be reduced sufficiently.
- the treatment of the waste liquid that occurs with the use of a plating solution, an etching solution, or the like also becomes a problem.
- the convex part formed by these methods does not have sufficient bonding strength with the metal foil, and often peels off from the metal foil when stress is applied from the outside. Therefore, it is difficult to say that the plating method, the etching method and the like are industrially advantageous methods for producing a metal foil having a convex portion on the surface.
- a technique is widely used in which a metal plate is passed through a pressure nip formed by a pair of rollers in pressure contact, and the metal plate is pressed.
- a typical example of such a pressure forming technique is cold rolling of steel.
- a dull roll has been proposed in which a crater-like recess and a raised portion that swells along the edge of the crater-like recess are formed on the surface (see, for example, Patent Document 1).
- the dull roll is used to apply a so-called dull surface to the surface of the cold-rolled steel sheet between the cold rolling process and the annealing process.
- the annealing process is batch annealing, seizure of the steel sheet is prevented.
- an annealing process is continuous annealing, meandering of a steel plate is prevented when conveying a steel plate within an annealing furnace.
- Patent Document 1 when the bulge portion on the surface of the dull roll is strongly pressed against the steel plate surface, a local plastic flow of the steel plate material occurs on the surface of the steel plate, the steel plate material flows into the concave portion of the dull roll, and the steel plate is rough. It is described that it is faced. Further, in Patent Document 1, while rotating a roll having a smooth surface, a laser pulse is projected onto the roll surface, the roller surface is melted regularly, and crater-like recesses are regularly formed to manufacture a dull roll. It is described to do.
- Patent Document 1 only discloses a technique for increasing the surface roughness of a cold-rolled steel sheet having a thickness of several hundred ⁇ m to several mm, and the surface of the metal foil having a thickness of only several tens of ⁇ m. There is no disclosure about the formation of convex portions. Moreover, since there is no special description about the material of a dull roll in patent document 1, it is thought that the dull roller is formed with the general material.
- a general material is a steel material harder than the steel plate cold-rolled, for example. The dull roll made of the above material cannot be used for forming a convex portion on an industrial scale because the crater-like concave portion on the surface is easily lost due to wear or the like.
- a concave portion having a desired opening shape cannot be formed.
- the opening edge of the recess is melted by the residual heat of the laser and becomes elliptical.
- Patent Document 2 a rolling roll has been proposed in which irregularities are formed on the surface, the depth of the concave portion is 5 to 100 ⁇ m, and the ratio of the total area of the convex tip end surface to the total surface area is 10 to 80% (for example, , See Patent Document 2).
- the technique of Patent Document 2 also applies a dull surface to the surface of a cold-rolled steel sheet having a thickness of several hundred ⁇ m to several mm, and forms a protruding convex portion on the surface of a metal foil having a thickness of several tens of ⁇ m. Not what you want. Since there is no special description about the material of a rolling roll in patent document 2, the rolling roll of patent document 2 cannot be utilized for the convex part formation on an industrial scale similarly to the dull roll of patent document 1, and A recess having a desired opening shape cannot be formed.
- a rolling device includes a first work roll in which a plurality of annular recesses (projection forming annular grooves) extending in the circumferential direction are formed and a second work roll having a smooth circumferential surface (for example, a patent). Reference 3).
- the first work roll and the second work roll are pressed against each other so that their axes are parallel to each other to form a pressure nip portion.
- a metal plate for producing a flat tube is obtained.
- a flat tube can be obtained by bending the metal plate for manufacturing the flat tube. This flat tube is used as a refrigerant flow tube for a condenser.
- Patent Document 3 proposes a cemented carbide as the material of the first work roll. Furthermore, cemented carbides such as JIS V10-60 are described. However, the technique of Patent Document 3 does not target a metal foil having a thickness of several tens of ⁇ m. Further, in Patent Document 3, only the engraving is described as a method for forming the annular recess, and there is no description about laser processing. In the engraving, it is very difficult to form a plurality of concave portions having a dimension of a micron unit at intervals of about 10 to 50 ⁇ m. Further, even when a large number of micron concave portions are formed in the cemented carbide by laser processing, the opening shape and the opening diameter of the concave portions are not necessarily uniform. Furthermore, in Patent Document 3, cemented carbide is only used to prevent the bottom surface of the annular recess from being worn.
- Patent Document 4 a technique for making holes in electronic parts such as ceramic green sheets and circuit boards by laser processing has been well known (see, for example, Patent Document 4). That is, it is often performed to form a recess on the surface of a ceramic layer, a resin layer, or the like by using laser processing.
- laser processing there is no proposal or report on the technical idea of using laser processing to form hundreds to tens of millions of recesses having a micron-size dimension on a metal surface.
- the opening shape and the opening diameter of the recesses on the metal surface are not uniform.
- the mechanical strength, wear resistance, and the like of the formed recess are reduced, and wear, deformation, breakage, and the like are likely to occur.
- An object of the present invention is a metal foil processing roller in which a plurality of recesses are formed on the peripheral surface, and even if the metal foil is processed on an industrial scale, the recesses are less likely to be worn or deformed. It is providing the roller for metal foil processing which can manufacture the metal foil which has this efficiently.
- the inventors of the present invention have intensively studied to solve the above problems.
- two of the various characteristics of the metal material that is, Rockwell hardness and bending strength
- the present inventors have further studied based on this finding.
- the number of concave portions is as many as several hundred to tens of millions.
- variations in the opening shape and opening diameter are very small, and a substantially uniform recess can be formed.
- the concave portion has high durability against external stress such as frictional force, and it is difficult for wear, deformation, breakage and the like to occur, and the present invention has been completed.
- the present invention is a metal foil processing roller in which a plurality of concave portions are formed on the peripheral surface by laser processing, and at least the surface layer portion where the concave portions are formed has a Rockwell hardness of A scale and HRA 81.2 to 90.
- the present invention relates to a metal foil processing roller that includes a metal material that is 0 and has a bending strength of 3 GPa to 6 GPa.
- the cross-sectional shape of the recess in the direction perpendicular to the peripheral surface of the metal foil processing roller is a tapered shape in which the cross-sectional width gradually or continuously decreases from the peripheral surface of the metal foil processing roller to the bottom surface of the recess. Is preferred.
- the opening shape of the concave portion on the peripheral surface of the metal foil processing roller is preferably approximately circular, approximately elliptical, approximately diamond-shaped or approximately regular polygonal.
- the opening diameter of the recesses on the peripheral surface of the metal foil processing roller is preferably 1 ⁇ m to 35 ⁇ m.
- the pitch of the concave portions in the roller axial direction on the peripheral surface of the metal foil processing roller is preferably 4 ⁇ m or more.
- the Rockwell hardness of the metal material is preferably HRA 83.9 to 89 on the A scale.
- the bending strength of the metal material is preferably 3.3 GPa to 5.5 GPa.
- the metal material is preferably at least one refractory metal material selected from the group consisting of cemented carbide, cermet, high-speed steel, die steel, and forged steel.
- the metal working roller is preferably used so that the bottom surface of the recess does not contact the surface of the metal foil.
- the roller for metal foil processing of the present invention has a plurality of recesses formed on its peripheral surface by laser processing.
- the opening shape and the opening diameter on the roller peripheral surface are substantially reduced. Can be evenly aligned.
- it can adjust to arbitrary opening shapes and opening diameters. For example, it becomes possible to form a recess having an opening diameter of several microns to several tens of microns. Further, it is possible to form a concave portion having an opening shape such as a substantially perfect circle, a substantially diamond shape, or a substantially regular polygon.
- such recesses can be formed at a pitch of about 10 to 50 ⁇ m.
- this recessed part has the very high durability with respect to the stress from the outside, and also is excellent in the mold release property with the convex part of the metal foil which grows in the internal space of a recessed part. Therefore, even if the processing of the metal foil is carried out industrially continuously, it is difficult for wear and deformation to occur, and a convex portion having substantially the same shape can be formed stably and efficiently.
- FIG. 1 It is a side view which shows typically the structure of a metal foil processing apparatus. It is a perspective view which expands and shows the structure of the principal part of the metal foil processing apparatus shown in FIG. It is a perspective view which shows the external appearance of the roller for metal foil processing. It is a perspective view which expands and shows the surface area
- the metal foil processing roller of the present invention press-molds a metal foil to obtain a metal foil having a convex portion on one or both surfaces in the thickness direction (hereinafter referred to as “metal foil having a convex portion”).
- metal foil having a convex portion used for.
- a molding apparatus including the metal foil processing roller of the present invention and a metal roller having a smooth surface is used.
- the metal foil processing roller and the metal roller are pressed against each other so that their axes are parallel to each other to form a pressure nip portion.
- the metal foil having the convex portion on one surface can be obtained.
- the metal foil which has a convex part on both surfaces can be obtained by pressing and using two rollers for metal foil processing.
- the metal foil that is pressure-formed by the metal foil processing roller of the present invention is not particularly limited, and is copper foil, copper alloy foil, tin foil, stainless steel foil, aluminum foil, aluminum alloy foil, lead foil, nickel foil, zinc foil. Etc. Moreover, it is preferable that the metal foil pressure-molded by the metal foil processing roller of the present invention has such characteristics that the grain boundary is easily deformed and the annealing temperature is low.
- the thickness of the metal foil is not particularly limited, but is preferably 10 to 100 ⁇ m, more preferably 10 to 50 ⁇ m.
- the metal foil which has a convex part obtained from copper foil, copper alloy foil, etc. using the roller for metal foil processing of this invention can be used conveniently as a negative electrode collector in a lithium secondary battery, for example.
- a columnar body containing a negative electrode active material and functioning as a negative electrode active material layer is formed by vacuum deposition on the surface of each convex portion of a metal foil having a convex portion obtained from a copper foil, a copper alloy foil, or the like.
- the negative electrode active material for example, silicon, silicon oxide, silicon-containing alloy, silicon compound, tin, tin oxide, tin-containing alloy, tin compound, or the like can be used.
- the metal foil having a convex portion obtained by the present invention can be suitably used for, for example, a metal foil or a metal layer in a flexible printed circuit board, a metal substrate for a lead frame, and the like.
- the metal foil processing roller of the present invention has two features.
- the first feature is that a plurality of recesses are formed on the peripheral surface.
- the second feature is that at least the surface layer portion where the concave portion is formed contains a metal material having specific characteristics.
- the concave portion is a space region having an opening in the peripheral surface (hereinafter simply referred to as “roller peripheral surface”) of the metal foil processing roller of the present invention, and being recessed or recessed in the roller rather than the roller peripheral surface.
- the bottom surface of the recess may be a substantially flat plane or may be a dome shape.
- Each recess is normally formed independently so as not to be connected to other recesses adjacent to it, but is not limited thereto, and may be partially connected and integrated, or connected to the whole. It may be integrated. Preferably, it forms independently so that each recessed part may not be connected.
- the shape of the opening in the roller peripheral surface of the recess is not particularly limited, but is preferably approximately circular, approximately elliptical, approximately diamond-shaped, approximately regular polygonal, or the like.
- the regular polygon is preferably a 3-8 octagon, more preferably a 4-6 hexagon.
- the substantially circular shape includes a circular shape and a shape close to a circular shape. The same applies to other shapes.
- the opening diameter in the roller peripheral surface of the recess is not particularly limited, but is preferably 1 ⁇ m to 35 ⁇ m, more preferably 2 to 30 ⁇ m. If the opening diameter is less than 1 ⁇ m, it is difficult to make the opening diameters of the individual recesses substantially uniform. When the opening diameter exceeds 35 ⁇ m, it is not suitable for surface processing of a metal foil having a thickness of about several tens of ⁇ m. In addition, the stress applied when the metal foil is pressure-formed may cause wear or deformation in the recess. When the opening shape is approximately circular, approximately elliptical, or approximately regular polygonal, the opening diameter is the length of the diameter of the smallest perfect circle that encloses the circle, ellipse, or regular polygon. When the opening shape is approximately rhombus, the opening diameter is the length of the longer diagonal line of the rhombus diagonal lines.
- the depth of the concave portion is not particularly limited, and can be appropriately selected according to, for example, the height of the convex portion to be formed on the surface of the metal foil, preferably 0.2 to 1.5 times the opening diameter, Preferably, it is 0.3 to 1.2 times the opening diameter. If the depth of the recess is less than 0.2 times the opening diameter, it may not be possible to form a protrusion having a uniform size and shape on the surface of the metal foil. In addition, it is extremely difficult to form the recess so that the depth of the recess exceeds 1.5 times the opening diameter by the laser processing method. Also, the cutting method requires a great deal of time or is substantially impossible to form the recess.
- the depth of the concave portion is the length of a perpendicular drawn from the most concave point on the bottom surface of the concave portion to the roller peripheral surface assumed to exist at the opening of the concave portion.
- the pitch at which the concave portions are formed on the roller peripheral surface is not particularly limited in both the axial direction (longitudinal direction) and the circumferential direction of the roller.
- the pitch in the axial direction of the recesses can be appropriately selected according to the opening diameter of the recesses, the opening shape, the length of the roller, the design value of the metal foil having the projections to be obtained, etc., preferably 4 ⁇ m or more, More preferably, it is 8 to 30 ⁇ m, and particularly preferably 15 to 30 ⁇ m.
- the pitch in the axial direction of the recesses is less than 4 ⁇ m, the recesses are easily connected by the laser processing method.
- the area of the roller surface between the concave portion and the concave portion adjacent to the concave portion becomes extremely small.
- the partition portion between the concave portion and the concave portion adjacent to the concave portion is deformed by stress applied when the metal foil is pressure-formed.
- the upper limit value of the pitch in the axial direction may be appropriately selected according to the length of the roller.
- the pitch in the circumferential direction of the recess can be appropriately selected according to the opening diameter of the recess, the opening shape, the circumferential length of the roller, the design value of the metal foil having the projection to be obtained,
- the thickness is preferably 4 ⁇ m or more, more preferably 5 to 20 ⁇ m.
- the circumferential pitch of the recesses is less than 4 ⁇ m, the recesses are easily connected to each other by the laser processing method. Therefore, the area of the roller surface partitioning the recesses becomes extremely small, and the threshold between the recesses may be deformed by the stress applied when the metal foil is pressed.
- the upper limit value of the pitch in the circumferential direction may be appropriately selected according to the circumferential length of the roller.
- the pitch in the axial direction is a distance (length) between two parallel straight lines extending in the circumferential direction through the centers of two recesses adjacent in the axial direction.
- the circumferential pitch is a distance (length) between two parallel straight lines extending in the axial direction through the centers of two concave portions adjacent in the circumferential direction.
- the center of the recess means the center of the opening of the recess.
- the center of the opening is the center of the smallest perfect circle that encloses the circle, ellipse, or regular polygon when the shape of the opening of the recess is substantially circular, substantially elliptical, or substantially regular polygonal.
- the intersection of two diagonal lines is the center of opening.
- the cross-sectional shape of the recess in the direction perpendicular to the peripheral surface of the roller is preferably a tapered shape in which the cross-sectional width gradually or continuously decreases from the roller peripheral surface toward the bottom surface of the recess.
- the concave section has a tapered shape
- the convex portion is formed on the surface of the metal foil by pressure forming of the metal foil, the releasability between the concave portion of the roller peripheral surface and the convex portion of the metal foil is remarkably improved. Inconveniences such as deformation of the convex portion are very unlikely to occur.
- the concave portion is formed by laser processing, and details of the laser processing will be described later.
- At least the surface layer portion where the recess is formed contains a specific metal material.
- This metal material has a Rockwell hardness of HRA 81.2 to 90.0, preferably HRA 83.9 to 89.0 on the A scale, and a bending strength of 3 GPa to 6 GPa, preferably 3.3 GPa to 5.5 GPa. It is.
- the roller will flatten or bend in the axial direction. May be insufficient, and the height of the convex portion may be lowered, or the convex portion having a size and shape that is substantially close to the design value may not be formed uniformly. Therefore, there is a possibility that a desired metal foil having a convex portion cannot be obtained. Further, the surface of the metal foil processing roller is worn, and the recesses are easily worn and deformed.
- the concave portion of the metal foil processing roller is likely to be cracked, chipped, cracked, etc., and the shape of the convex portion is deformed or convex to an unnecessary position. There is a possibility that the pressure forming of the metal foil becomes insufficient, such as forming a part.
- the difference in penetration depth h of the diamond indenter is obtained as follows. Using a diamond indenter with a tip radius of curvature of 0.2 mm and a cone angle of 120 °, an initial load of 98.07 N is applied to the sample surface, then a test load of 588.4 N is applied, and the initial load is applied again. The penetration depth of the diamond indenter at the initial load twice before and after is measured, and the difference between these measured values is defined as the difference h of the penetration depth of the diamond indenter.
- the bending strength is less than 3 GPa
- the concave portion of the metal foil processing roller is likely to be cracked, chipped or cracked, and the shape of the convex portion is deformed or the convex portion is formed at an unnecessary position.
- the metal foil may be insufficiently pressed. Accordingly, the metal foil processing roller cannot withstand long-term use, and the formation of convex portions becomes insufficient even in the initial use, which may increase the defective product rate.
- the bending strength exceeds 6 GPa, even if the metal foil is pressure-molded, the roller is flattened or deflected in the axial direction.
- the protrusion height becomes low, or the protrusions having a size and shape almost close to the design value cannot be formed uniformly. Further, the wear resistance of the surface of the metal foil processing roller is lowered, and the recesses are easily worn and deformed. In addition, after the metal foil is formed, the mold releasability between the metal foil processing roller and the metal foil is lowered, and there is a possibility that problems such as the metal foil being caught by the metal foil processing roller may occur.
- the bending strength is a value measured as follows based on JIS Z-2248.
- As the test piece a round bar having a diameter D of 13 mm and a length of 300 mm is used.
- the bending strength measurement test is performed as a three-point bending test using a universal testing machine and a bending test apparatus attached thereto, with the distance L between the fulcrums set to 200 mm.
- W max the maximum load
- the metal material having Rockwell hardness and bending strength in the predetermined numerical range shown above at least one high material selected from the group consisting of cemented carbide, cermet, high-speed steel, die steel and forged steel is used. It is preferable to use a melting point metal material. Among these, cemented carbide, high-speed steel, forged steel, and the like are more preferable, and forged steel is particularly preferable.
- a metal material belonging to these refractory metal materials and having a predetermined Rockwell hardness and bending strength is capable of laser processing, and is extremely excellent in shape and size reproducibility.
- the metal foil processing roller may contain one or more metal materials.
- cemented carbide As a specific example of the cemented carbide, a known one can be used. For example, cemented carbide obtained by sintering carbide particles of metals in groups 4A, 5A, and 6A of a periodic table using a metal binder such as Fe, Co, and Ni. An alloy etc. are mentioned. Specific examples of the cemented carbide include, for example, WC—Co, WC—Cr 3 C 2 —Co, WC—TaC—Co, WC—TiC—Co, WC—NbC—Co, WC—TaC.
- cermets can be known, such as TiC—Ni, TiC—Mo—Ni, TiC—Co, TiC—Mo 2 C—Ni, TiC—Mo 2 C—ZrC—Ni. , TiC—Mo 2 C—Co, Mo 2 C—Ni, Ti (C, N) —Mo 2 C—Ni, TiC—TiN—Mo 2 C—Ni, TiC—TiN—Mo 2 C -Co, TiC-TiN-Mo 2 C-TaC-Ni, TiC-TiN-Mo 2 C-WC-TaC-Ni, TiC-WC-Ni, Ti (C, N) -WC-Ni TiC—Mo system, Ti (C, N) -WC-Ni TiC—Mo system, Ti (C, N) —Mo system, boride system (MoB—Ni system, B 4 C / (W, Mo) B 2 system, etc.) and the like.
- High-speed steel is a material obtained by adding a metal such as molybdenum, tungsten, or vanadium to iron and then heat-treating it to increase its hardness.
- a high-speed steel a known steel can be used.
- die steel known ones can be used, for example, die steel containing iron, carbon, tungsten, vanadium, molybdenum and chromium, die steel containing iron, carbon, vanadium, molybdenum and chromium, iron, carbon, silicon , Manganese, sulfur, chromium, molybdenum and / or tungsten, vanadium, nickel, copper, and die steel containing aluminum.
- Forged steel is a steel ingot produced by casting molten steel in a mold or a steel piece produced from the steel ingot, and forged or rolled and forged with a press and a hammer, and then heat-treated. It is a material manufactured by Known forged steel can be used, for example, forged steel containing iron as a main component and containing carbon, chromium and nickel, forged steel containing iron as a main component and containing silicon, chromium and nickel, nickel, chromium and molybdenum.
- a metal material exhibiting a predetermined Rockwell hardness and bending strength can be obtained by appropriately selecting the composition of the contained components.
- the material which has desired Rockwell hardness and bending strength can be obtained by selecting heat processing temperature suitably.
- the thickness of the surface layer portion containing a metal material exhibiting a predetermined Rockwell hardness and bending strength is not particularly limited, but is preferably about 5 to 50 mm.
- the metal material is a refractory metal material
- the metal foil processing roller having the surface layer portion as described above can be produced, for example, by shrink-fitting or cold-fitting a refractory metal material cylinder to a core roll. . With shrink fitting, a refractory metal material cylinder is produced so that the inner diameter is slightly smaller than the outer diameter of the core roll, and the refractory metal material cylinder is warmed and expanded to fit into the core roll. That is.
- the cold fitting is to fit the core roll, which has been contracted by cooling, into a refractory metal cylinder made so that the inner diameter is slightly smaller than the outer diameter of the core roll.
- a core roll for example, a roll made of stainless steel, iron, or the like can be used.
- the roller for metal foil processing of this invention may be comprised with the metal material which not only the surface layer part but the whole shows predetermined Rockwell hardness and bending strength.
- the concave portion present on the peripheral surface of the metal foil processing roller of the present invention is formed by laser processing. That is, a conventional drilling method using a laser can be used to form the recess.
- a laser processing apparatus including a roller rotating device, a laser oscillator, a processing head, a light guide path, a mask portion, and an actuator can be used.
- the roller rotating device includes, for example, a roller support base and a driving device.
- the roller support base supports a roller having at least a surface layer portion containing a metal material having a predetermined Rockwell hardness and a bending strength and having no concave portion formed on the peripheral surface thereof, so as to be rotatable about its axis.
- the drive device rotates a roller (hereinafter referred to as a “recess-forming roller”) supported by a roller support base around its axis.
- the laser oscillator is a device that outputs laser light.
- a known laser oscillator can be used.
- a solid-state laser oscillator (Nd: YAG laser, Nd) using a laser medium in which neodymium ions are mixed into a YAG crystal (yttrium, aluminum, garnet) or a YVO 4 crystal. : YVO 4 laser), and the like.
- a carbon dioxide laser, an excimer laser, etc. can also be used.
- the output of the laser oscillator is, for example, 50 mW to 200 W.
- the frequency of the laser light is preferably 100 Hz to 100 kHz.
- the irradiation time of the laser beam is not particularly limited, but is preferably 10 ps to 200 ns per time.
- the irradiation time is less than 10 ps, heat conduction due to laser light irradiation does not occur, and only one layer of atoms can be removed, and the formation of the recesses may be insufficient.
- the laser beam may sweep the surface of the recess forming roller due to the rotation of the recess forming roller.
- the processing head is a member provided on the downstream side of the light guide in the laser light output direction by the laser oscillator.
- the processing head collects the laser beam output from the laser oscillator and sent through the light guide path and irradiates the outer peripheral surface of the recess forming roller.
- the processing head includes, for example, a condenser lens.
- the condensing lens is provided so as to be orthogonal to the path of the laser light, condenses the laser light sent through the light guide path, and irradiates the outer peripheral surface of the recess forming roller.
- the focal length of the condenser lens is not particularly limited, but is preferably selected from the range of 5 mm to 200 mm.
- an assist gas is introduced into the processing head. Examples of the assist gas include oxygen, nitrogen, helium, argon, and a mixed gas of two or more of these.
- the pressure of the assist gas may be selected from the range of 0.1 MPa to 1 MPa, for example.
- the light guide is a member that is provided downstream of the laser oscillator in the laser light output direction of the laser oscillator and guides the laser light output from the laser oscillator to the machining head.
- the light guide path includes, for example, a plurality of reflection mirrors. By arranging a plurality of reflection mirrors at appropriate positions, the laser light is reflected by the reflection mirror and guided to the processing head. Of the plurality of reflection mirrors, the reflection mirror that is closest to the processing head and directly guides the laser beam to the processing head is provided so as to be able to reciprocate so as to be interlocked with the reciprocation of the processing head.
- the mask portion is a member that is provided in the middle of the light guide and shapes the contour of the laser light into a desired shape.
- a laser passage hole which is a through hole having the same opening shape as the concave portion to be formed, is formed in the mask portion.
- the contour of the laser beam that has passed through the laser passage hole is shaped into the opening shape of the laser passage hole, and the same image as the opening shape of the laser passage hole is formed on the outer peripheral surface of the recess forming roller by the condenser lens of the processing head. The That is, the opening shape of the laser passage hole becomes the opening shape of the recess.
- the actuator is provided vertically below the laser oscillator, the processing head, the light guide path, and the mask portion, and supports these devices and members integrally and reciprocally.
- the actuator reciprocates these devices and members in parallel with the longitudinal direction of the recess forming roller.
- Such laser processing apparatuses are widely commercially available. Even in a laser processing apparatus that does not include a roller rotating device, laser processing for forming a recess can be performed by mounting the roller rotating device at a predetermined position.
- the laser processing device irradiates the peripheral surface of the recess forming roller with laser light continuously or intermittently, preferably intermittently, thereby forming the recess.
- the concave portion forming roller is rotated or the machining head is moved in the longitudinal direction of the concave portion forming roller by the actuator to newly form the concave portion.
- a concave portion is formed in a desired region of the concave portion forming roller, and the metal foil processing roller of the present invention is obtained.
- a ridge may be formed along the edge of the opening on the roller peripheral surface of the recess. Such ridges are preferably removed by, for example, polishing. Polishing can be performed according to a known method. For example, diamond particles are used as an abrasive and a polishing apparatus provided with a polishing pad is used and supplied with a medium such as water.
- FIG. 1 is a side view schematically showing the configuration of the metal foil processing apparatus 10.
- FIG. 2 is an enlarged perspective view showing a configuration of a main part (processing means 4) of the metal foil processing apparatus 10 shown in FIG.
- FIG. 3 is a perspective view showing an appearance of the metal foil processing roller 1.
- 4 is an enlarged perspective view showing the surface region 1x of the metal foil processing roller 1 shown in FIG.
- the metal foil 2 having a convex portion is a metal foil having a convex portion 9 formed on the surface, and can be manufactured by, for example, the metal foil processing apparatus 10 shown in FIG.
- the metal foil processing apparatus 10 includes a metal foil supply unit 3, a processing unit 4, and a metal foil winding unit 5.
- the metal foil supply means 3 is specifically a metal foil supply roller.
- the metal foil supply roller is pivotally supported by a support means (not shown) so as to be rotatable around an axis.
- a metal foil 8 is wound around the peripheral surface of the metal foil supply roller. This metal foil 8 is supplied to the pressure nip 6 of the processing means 4.
- the processing means 4 includes two metal foil processing rollers 1 as shown in FIGS. 1 and 2.
- the two metal foil processing rollers 1 are pressed against each other so that their axes are parallel to each other. Thereby, the press-contact nip part 6 is formed.
- the press-contact nip 6 can pass a thin sheet-like material such as a metal foil 8.
- Each of the metal foil processing rollers 1 is rotatably supported by a support means (not shown) and is rotatably driven around an axis by a drive means (not shown).
- Both of the two metal foil processing rollers 1 may be drive rollers, or one may be a drive roller and the other may be a driven roller that rotates as the drive roller rotates.
- a back roller (not shown) is brought into pressure contact with each metal working roller 1.
- the metal processing roller 1 and the backup roller have mutually parallel axes.
- the metal foil 8 is guided from the inlet to the outlet of the press-contact nip 6, and the metal foil 8 is pressed.
- the metal foil 2 which has the convex part by which the convex part 9 was formed in the surface of the metal foil 8 is obtained.
- the metal foil processing roller 1 is a roller according to the present invention in which a plurality of recesses 1a are formed on a peripheral surface.
- the arrangement pattern of the recesses 1a on the circumferential surface of the metal foil processing roller 1 is as follows. As shown in FIG. 4, a row in which a plurality of concave portions 1 a are connected at a pitch P 1 in the longitudinal direction of the metal foil processing roller 1 is defined as one row unit 7.
- the plurality of row units 7 are arranged at a pitch P 2 in the circumferential direction of the metal foil processing roller 1.
- the pitch P 1 and the pitch P 2 can be set arbitrarily.
- the longitudinal displacement of the recess 1a is a 0.5P 1, without being limited thereto, it is possible to arbitrarily set.
- the opening shape of the recess 1a on the circumferential surface of the metal foil processing roller 1 is substantially circular, but is not limited to this, and is, for example, substantially elliptical, substantially rhombus, substantially equilateral triangle, It may be a square, a substantially regular hexagon, a substantially regular octagon, or the like.
- the cross section of the recess 1a in the direction perpendicular to the peripheral surface of the metal foil processing roller 1 has a width in the direction parallel to the peripheral surface of the metal foil processing roller 1 from the peripheral surface of the metal foil processing roller 1 to the bottom of the recess 1a. It has a taper shape that gradually decreases toward. Thereby, the release property from the metal foil processing roller 1 of the metal foil 2 having a convex portion after the press molding is completed is improved.
- the diameter of the metal foil processing roller 1 is not particularly limited, but is preferably about 30 mm to 200 mm.
- the pressure contact pressure (linear pressure) of the two metal foil processing rollers 1 is not particularly limited, but is preferably about 5 kN ⁇ cm to 20 kN ⁇ cm.
- the two rollers forming the press-contact nip 6 are the metal foil processing roller 1 of the present invention, but the present invention is not limited to this.
- one of the two rollers may be the metal foil processing roller 1 of the present invention, and the other may be a roller having a smooth surface without forming a recess on the surface.
- a convex portion-forming metal foil having a convex portion formed on one surface in the thickness direction is obtained.
- the metal foil 8 is compressed by passing it through the pressure nip 6 to form a sealed space surrounded by the concave portion 1a and the surface of the metal foil 8, and in this sealed space, air is sealed. Remains.
- the metal foil winding means 5 is specifically a metal foil winding roller.
- the metal foil winding roller is pivotally supported by a supporting means (not shown) so as to be rotatable around an axis. Further, the metal foil winding roller is rotationally driven by a driving means (not shown).
- the metal foil winding roller winds around the circumferential surface of the metal foil 2 having a convex portion formed by the processing means 4 while rotating. According to the metal foil processing apparatus 10, the metal foil 2 having convex portions is manufactured by press-molding the metal foil 8.
- Example 1 An Nb: YAG laser was mounted as a laser oscillator in a laser processing apparatus (Spectra Physics Co., Ltd.). The intensity of the laser beam output from the processing head was set to 23 ⁇ J per irradiation. Further, the focusing lens and focal length were adjusted, and the imaging magnification of the processing head was set to 16 times. That is, the imaging size of the processing head is 1/16 times the opening of the laser processing mask.
- a stainless steel plate (SUS304) having a thickness of 0.3 mm and dimensions of 22 mm ⁇ 22 mm was subjected to electric discharge machining to form a laser passage hole having a substantially rhombus shape.
- the diamond-shaped opening diameter of the laser passage hole (the length of the longer diagonal line) was 0.32 mm.
- the length of the shorter diagonal line was 0.16 mm.
- a forged steel roller (Daido Machinery Co., Ltd., diameter: 50 mm, roller width: 100 mm, Rockwell hardness of forged steel: HRA84.9 on A scale, bending strength : 4.0 GPa, forged steel composition: by weight, carbon 1%, silicon 0.24%, manganese 0.36%, chromium 1.46% and balance iron), and the forged steel roller surface was irradiated for 50 hours. Laser light was irradiated at nanoseconds and an irradiation interval of 1 millisecond.
- the laser beam irradiation region was moved 20 ⁇ m in the longitudinal direction of the forged steel roll or 29 ⁇ m in the circumferential direction, and the laser beam was irradiated in the same manner.
- the circumferential movement was performed by rotating a forged steel roller. After moving in the circumferential direction to form 5400 concave portions, moving 20 ⁇ m in the longitudinal direction, rotating 14.5 ⁇ m in the circumferential direction, and then repeating the operation of forming 5400 concave portions in the circumferential direction. . It was moved 4500 times in the width direction of the roller and processed 90 mm. In this way, 24.3 million recesses were formed in a staggered pattern, and the metal foil processing roller of the present invention was produced.
- the opening shape of the formed recess was almost rhombus, and the opening diameter (length of the longer diagonal of the rhombus) was 20 ⁇ m.
- the diagonal length of the shorter rhombus was 10 ⁇ m.
- the bottom surface of the recess was dome-shaped, and the depth of the recess was about 12 ⁇ m.
- the pitch in the longitudinal direction of the recess was about 20 ⁇ m, and the pitch in the short side direction (circumferential direction of the forged steel roll) was about 29 ⁇ m.
- the two metal foil processing rollers were mounted on the metal foil processing apparatus 10.
- the pressing force at the pressure nip portion of the metal foil processing apparatus 10 is set to about 14.7 kN ⁇ cm (1500 kgf / cm) as a linear pressure, and processing is performed by passing a tough pitch copper foil having a width of 80 mm and a thickness of 26 ⁇ m through the pressure nip portion. went.
- Convex portions corresponding to the concave portions of the metal foil processing roller were formed on the processed copper foil surface.
- a laser microscope trade name: VK-9500, manufactured by Keyence Corporation
- the copper foil was processed at a volume of 100 m / 1 and 2000 m was processed with 20 rolls.
- the shape of the protrusions formed on the surface of the copper foil was almost the same, and the height of the protrusions was 7.0 ⁇ m.
- Example 2 Cemented carbide roller (Fuji Dice Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 90.0, bending strength: 3.1 GPa, tungsten carbide particles and cobalt (binder)
- the metal foil processing roller of the present invention was produced in the same manner as in Example 1 except that (1) was used.
- the two metal foil processing rollers are mounted on the metal foil processing apparatus 10, and the pressure at the pressure nip is changed from about 14.7 kN ⁇ cm (1500 kgf / cm) to about 9.8 kN ⁇ cm (1000 kgf / cm).
- a tough pitch copper foil having a width of 80 mm and a thickness of 26 ⁇ m was processed in the same manner as in Example 1. Convex portions corresponding to the concave portions of the metal foil processing roller were formed on the processed copper foil surface. The average height of the ten convex portions as measured by a laser microscope (VK-9500) was 6.5 ⁇ m. The copper foil was processed at a volume of 100 m / 1 and processed 1000 times with 10 rolls. The shape of the protrusions formed on the surface of the copper foil was almost uniform and the height of the protrusions was 6.7 ⁇ m. Moreover, as a result of observing the surface of the metal foil processing roller after processing with a laser microscope, generation of cracks and chipping was not observed.
- Example 3 Carbide roller (Fuji Dice Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 89.0, bending strength: 3.3 GPa, containing tungsten carbide particles and cobalt (binder)) is used.
- a metal foil processing roller of the present invention was produced in the same manner as in Example 1 except for the above. The two metal foil processing rollers are mounted on the metal foil processing apparatus 10, and the pressure at the pressure nip is changed from about 14.7 kN ⁇ cm (1500 kgf / cm) to about 9.8 kN ⁇ cm (1000 kgf / cm).
- a tough pitch copper foil having a width of 80 mm and a thickness of 26 ⁇ m was processed in the same manner as in Example 1. Convex portions corresponding to the concave portions of the metal foil processing roller were formed on the surface of the processed copper foil. The average height of the ten convex portions as measured with a laser microscope (VK-9500) was 6.3 ⁇ m. Furthermore, when the copper foil was processed into 2000 m with 20 rolls with 100 m / 1 roll, the shape of the protrusions formed on the copper foil surface was almost the same as the initial, and the average height of the 10 protrusions was 6.4 ⁇ m. Met. As a result of observing the surface of the metal foil processing roller after processing with a microscope, generation of cracks and chipping was not observed.
- Example 4 The metal of the present invention is the same as in Example 1 except that a forged steel roller (Daido Machinery Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 83.9, bending strength: 5.5 GPa) is used. A foil processing roller was produced. The composition of the forged steel was, by weight, 1.1% carbon, 0.22% silicon, 0.38% manganese, 1.76% chromium and the balance iron. The two metal foil processing rollers are mounted on the metal foil processing apparatus 10, and the pressure at the pressure nip is changed from about 9.8 kN ⁇ cm (1000 kgf / cm) to about 19.6 kN ⁇ cm (2000 kgf / cm).
- a forged steel roller (Daido Machinery Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 83.9, bending strength: 5.5 GPa) is used.
- a foil processing roller was produced.
- the composition of the forged steel was,
- a tough pitch copper foil having a width of 80 mm and a thickness of 26 ⁇ m was processed in the same manner as in Example 1. Convex portions corresponding to the concave portions of the metal foil processing roller were formed on the processed copper foil surface. The average height of 10 convex portions as measured with a laser microscope (VK-9500) was 5.8 ⁇ m. Further, when the copper foil was processed at a volume of 100 m / 1 and 20 turns to 2000 m, the shape of the protrusions formed on the surface of the copper foil was almost the same as the initial, and the average height of the 10 protrusions was 5.7 ⁇ m. Met. As a result of observing the surface of the metal foil processing roller after processing with a microscope, no cracks or chipping occurred.
- Example 5 The present invention is the same as that of Example 1 except that a die steel roller (Daido Machinery Co., Ltd., diameter 50 mm, roller width 100 mm, Rockwell hardness: H scale 81.2, bending strength: 5.8 GPa) is used.
- a metal foil processing roller was prepared.
- the composition of the die steel was carbon 1.4%, silicon 0.4%, manganese 0.6%, chromium 11.2%, molybdenum 0.9%, vanadium 0.3% and the balance iron.
- the two metal foil processing rollers were mounted on the metal foil processing apparatus 10, and a tough pitch copper foil having a width of 80 mm and a thickness of 26 ⁇ m was processed in the same manner as in Example 4.
- Convex portions corresponding to the concave portions of the metal foil processing roller were formed on the processed copper foil surface.
- the average height of the ten convex portions as measured with a laser microscope (VK-9500) was 4.9 ⁇ m.
- the shape of the protrusions formed on the surface of the copper foil was almost the same as the initial, and the average height of 10 protrusions was 5.0 ⁇ m. Met.
- Example 1 Cemented carbide roller (Fuji Dice Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 94.0, bending strength: 1.5 GPa, containing tungsten carbide particles and cobalt (binder))
- a metal foil processing roller was produced in the same manner as in Example 1 except that was used. Variations in the opening shape and the opening diameter of the recesses on the peripheral surface of the metal foil processing roller were recognized. In particular, the shape of the opening was almost diamond-shaped, but many were elliptical.
- the two metal foil processing rollers are mounted on the metal foil processing apparatus 10, and the pressure at the pressure nip is changed from about 14.7 kN ⁇ cm (1500 kgf / cm) to about 9.8 kN ⁇ cm (1000 kgf / cm). Except for this, a tough pitch copper foil having a width of 80 mm and a thickness of 26 ⁇ m was processed in the same manner as in Example 1. Convex portions corresponding to the concave portions of the metal foil processing roller were formed on the processed copper foil surface. That is, there was variation in the shape of the convex portion. The average height of the ten convex portions as measured with a laser microscope (VK-9500) was 7.2 ⁇ m.
- the metal foil of the present invention was the same as in Example 1 except that a die steel roller (Daido Machinery Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 78.0, bending strength: 8 GPa) was used. A processing roller was produced.
- the composition of the die steel was carbon 0.4%, silicon 1.1%, manganese 0.5%, chromium 5.0%, molybdenum 1.0%, vanadium 1.0% and the balance iron. Variations in the opening shape and the opening diameter of the recesses on the peripheral surface of the metal foil processing roller were recognized. In particular, the shape of the opening was almost diamond-shaped, but many were elliptical.
- the two metal foil processing rollers are mounted on the metal foil processing apparatus 10, and the pressure at the pressure nip is about 9.8 kN ⁇ cm (1000 kgf / cm), about 14.7 kN ⁇ cm (1500 kgf / cm), or about 19
- a tough pitch copper foil having a width of 80 mm and a thickness of 26 ⁇ m was processed in the same manner as in Example 1 except that it was set to 0.6 kN ⁇ cm (2000 kgf / cm). Convex portions corresponding to the concave portions of the metal foil processing roller were formed on the processed copper foil surface. That is, there was variation in the shape of the convex portion.
- the average height of the ten convex portions measured by a laser microscope is 2.2 ⁇ m (about 9.8 kN ⁇ cm), 2.3 ⁇ m (about 14.7 kN ⁇ cm), 2.3 ⁇ m (about 19.6 kN ⁇ cm). It has been found that the height of the convex portion does not increase even when the pressure at the pressure nip is increased. This is considered to be because the metal foil processing roller becomes flatter as the pressure is increased, the area where the roller surface and the copper foil are in contact with each other increases, and the actual load applied to the copper foil does not increase.
- the metal foil processing roller of the present invention has a concave portion formed on a roller containing a metal material having a Rockwell hardness of A scale of HRA 81.2 to 90.0 and a bending strength of 3 GPa to 6 GPa. Is.
- the metal foil processing roller of the present invention can be suitably used for forming convex portions on the surfaces of various metal foils.
- the metal foil processing roller of the present invention exhibits high durability, even when mass-producing metal foil having convex portions, it can be produced efficiently and at a very low defective product rate, which is industrially advantageous. .
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Abstract
Description
たとえば、クレータ状凹部と、クレータ状凹部の縁に沿って盛り上がった盛り上がり部とが表面に形成されたダルロールが提案されている(たとえば、特許文献1参照)。ダルロールは、冷間圧延工程と焼鈍工程との間において、冷間圧延された鋼板の表面に、いわゆるダル目を付けるために用いられる。これにより、焼鈍工程がバッチ焼鈍である場合は、鋼板の焼き付きが防止される。また、焼鈍工程が連続焼鈍である場合は、焼鈍炉内で鋼板を搬送する際に、鋼板の蛇行が防止される。 In addition, a technique is widely used in which a metal plate is passed through a pressure nip formed by a pair of rollers in pressure contact, and the metal plate is pressed. A typical example of such a pressure forming technique is cold rolling of steel.
For example, a dull roll has been proposed in which a crater-like recess and a raised portion that swells along the edge of the crater-like recess are formed on the surface (see, for example, Patent Document 1). The dull roll is used to apply a so-called dull surface to the surface of the cold-rolled steel sheet between the cold rolling process and the annealing process. Thereby, when the annealing process is batch annealing, seizure of the steel sheet is prevented. Moreover, when an annealing process is continuous annealing, meandering of a steel plate is prevented when conveying a steel plate within an annealing furnace.
本発明者らは、この知見に基づいてさらに研究を重ねた。その結果、特定のロックウェル硬度および抗折力を有する金属材料からなるローラ表面にミクロン単位の凹部を形成する場合には、凹部の個数が数百個~数千万個に及ぶ多数であっても、開口形状および開口径のばらつきが非常に少なく、ほぼ均一な凹部を形成できることを見出した。また、この凹部は、外部から摩擦力などの応力に対して高い耐久性を有し、摩耗、変形、破損などが起こり難いことを見出し、本発明を完成するに至った。 The inventors of the present invention have intensively studied to solve the above problems. In the process, it was found that two of the various characteristics of the metal material, that is, Rockwell hardness and bending strength, have a great influence on the opening shape and opening diameter of the recess during laser processing.
The present inventors have further studied based on this finding. As a result, in the case where concave portions in units of microns are formed on the surface of a roller made of a metal material having a specific Rockwell hardness and bending strength, the number of concave portions is as many as several hundred to tens of millions. However, it was found that variations in the opening shape and opening diameter are very small, and a substantially uniform recess can be formed. Further, it has been found that the concave portion has high durability against external stress such as frictional force, and it is difficult for wear, deformation, breakage and the like to occur, and the present invention has been completed.
金属箔加工用ローラ周面における凹部の開口形状は、ほぼ円形、ほぼ楕円形、ほぼ菱形またはほぼ正多角形であることが好ましい。
金属箔加工用ローラ周面における凹部の開口径は、1μm~35μmであることが好ましい。
金属箔加工用ローラ周面における該ローラ軸線方向の凹部のピッチは、4μm以上であることが好ましい。 The cross-sectional shape of the recess in the direction perpendicular to the peripheral surface of the metal foil processing roller is a tapered shape in which the cross-sectional width gradually or continuously decreases from the peripheral surface of the metal foil processing roller to the bottom surface of the recess. Is preferred.
The opening shape of the concave portion on the peripheral surface of the metal foil processing roller is preferably approximately circular, approximately elliptical, approximately diamond-shaped or approximately regular polygonal.
The opening diameter of the recesses on the peripheral surface of the metal foil processing roller is preferably 1 μm to 35 μm.
The pitch of the concave portions in the roller axial direction on the peripheral surface of the metal foil processing roller is preferably 4 μm or more.
金属材料の抗折力は、3.3GPa~5.5GPaであることが好ましい。
金属材料は、超硬合金、サーメット、ハイス鋼、ダイス鋼および鍛鋼よりなる群から選ばれる少なくとも1種の高融点金属材料であることが好ましい。
金属加工用ローラは、凹部の底面と、金属箔の表面とが接触しないように用いられることが好ましい。 The Rockwell hardness of the metal material is preferably HRA 83.9 to 89 on the A scale.
The bending strength of the metal material is preferably 3.3 GPa to 5.5 GPa.
The metal material is preferably at least one refractory metal material selected from the group consisting of cemented carbide, cermet, high-speed steel, die steel, and forged steel.
The metal working roller is preferably used so that the bottom surface of the recess does not contact the surface of the metal foil.
また、この凹部は外部からの応力に対して非常に高い耐久性を有し、さらに、凹部の内部空間で成長する金属箔の凸部との離型性にも優れている。したがって、金属箔の加工を工業的に連続して実施しても、摩耗、変形などが起こり難く、ほぼ同じ形状を有する凸部を安定的にかつ効率良く形成できる。 The roller for metal foil processing of the present invention has a plurality of recesses formed on its peripheral surface by laser processing. In the metal foil processing roller of the present invention, by including a metal material having Rockwell hardness and bending strength in the above ranges in at least the surface layer portion forming the recess, the opening shape and the opening diameter on the roller peripheral surface are substantially reduced. Can be evenly aligned. Moreover, it can adjust to arbitrary opening shapes and opening diameters. For example, it becomes possible to form a recess having an opening diameter of several microns to several tens of microns. Further, it is possible to form a concave portion having an opening shape such as a substantially perfect circle, a substantially diamond shape, or a substantially regular polygon. Further, such recesses can be formed at a pitch of about 10 to 50 μm.
Moreover, this recessed part has the very high durability with respect to the stress from the outside, and also is excellent in the mold release property with the convex part of the metal foil which grows in the internal space of a recessed part. Therefore, even if the processing of the metal foil is carried out industrially continuously, it is difficult for wear and deformation to occur, and a convex portion having substantially the same shape can be formed stably and efficiently.
凸部表面に柱状体の負極活物質層を形成することにより、リチウムイオンを吸蔵および放出する際の負極活物質の膨張および収縮に伴って発生する応力が吸収され、負極集電体ひいては負極の変形、負極活物質層の負極集電体からの剥落などが防止される。その結果、充放電サイクル特性、長期的な安全性などに優れ、しかも高出力が可能なリチウムイオン二次電池が得られる。
また、本発明により得られる、凸部を有する金属箔は、たとえば、フレキシブルプリント配線基板における金属箔または金属層、リードフレーム用の金属基板などにも好適に使用できる。 The metal foil which has a convex part obtained from copper foil, copper alloy foil, etc. using the roller for metal foil processing of this invention can be used conveniently as a negative electrode collector in a lithium secondary battery, for example. A columnar body containing a negative electrode active material and functioning as a negative electrode active material layer is formed by vacuum deposition on the surface of each convex portion of a metal foil having a convex portion obtained from a copper foil, a copper alloy foil, or the like. . At this time, as the negative electrode active material, for example, silicon, silicon oxide, silicon-containing alloy, silicon compound, tin, tin oxide, tin-containing alloy, tin compound, or the like can be used.
By forming the columnar negative electrode active material layer on the convex surface, the stress generated as the negative electrode active material expands and contracts when lithium ions are occluded and released is absorbed. Deformation and peeling of the negative electrode active material layer from the negative electrode current collector are prevented. As a result, a lithium ion secondary battery having excellent charge / discharge cycle characteristics, long-term safety, and the like and capable of high output can be obtained.
Moreover, the metal foil having a convex portion obtained by the present invention can be suitably used for, for example, a metal foil or a metal layer in a flexible printed circuit board, a metal substrate for a lead frame, and the like.
凹部は、本発明の金属箔加工用ローラの周面(以下単に「ローラ周面」という)に開口を有し、ローラ周面よりもローラの内部に凹んだまたは窪んだ空間領域である。凹部の底面は、ほぼ平坦な平面でも良く、またドーム状などでもよい。 The metal foil processing roller of the present invention has two features. The first feature is that a plurality of recesses are formed on the peripheral surface. The second feature is that at least the surface layer portion where the concave portion is formed contains a metal material having specific characteristics.
The concave portion is a space region having an opening in the peripheral surface (hereinafter simply referred to as “roller peripheral surface”) of the metal foil processing roller of the present invention, and being recessed or recessed in the roller rather than the roller peripheral surface. The bottom surface of the recess may be a substantially flat plane or may be a dome shape.
凹部のローラ周面における開口の形状は、特に制限されないが、好ましくは、ほぼ円形、ほぼ楕円形、ほぼ菱形、ほぼ正多角形などである。正多角形は、好ましくは3~8角形、さらに好ましくは4~6角形である。なお、ほぼ円形とは円形および円形に近い形状を含む。他の形状についても同様である。 Each recess is normally formed independently so as not to be connected to other recesses adjacent to it, but is not limited thereto, and may be partially connected and integrated, or connected to the whole. It may be integrated. Preferably, it forms independently so that each recessed part may not be connected.
The shape of the opening in the roller peripheral surface of the recess is not particularly limited, but is preferably approximately circular, approximately elliptical, approximately diamond-shaped, approximately regular polygonal, or the like. The regular polygon is preferably a 3-8 octagon, more preferably a 4-6 hexagon. The substantially circular shape includes a circular shape and a shape close to a circular shape. The same applies to other shapes.
凹部はレーザ加工により形成されるが、レーザ加工の詳細については、後記する。 The cross-sectional shape of the recess in the direction perpendicular to the peripheral surface of the roller is preferably a tapered shape in which the cross-sectional width gradually or continuously decreases from the roller peripheral surface toward the bottom surface of the recess. When the concave section has a tapered shape, when the convex portion is formed on the surface of the metal foil by pressure forming of the metal foil, the releasability between the concave portion of the roller peripheral surface and the convex portion of the metal foil is remarkably improved. Inconveniences such as deformation of the convex portion are very unlikely to occur.
The concave portion is formed by laser processing, and details of the laser processing will be described later.
HRA=100-0.5h
〔式中、hはダイヤモンド圧子の侵入深さの差hを示す。〕
ダイヤモンド圧子の侵入深さの差hは、次のようにして求められる。先端の曲率半径が0.2mmで円錐角120°のダイヤモンド圧子を用いて、試料表面に初荷重98.07Nを付加し、次に試験荷重588.4Nを付加し、再び初荷重を付加する。前後2回の初荷重におけるダイヤモンド圧子の侵入深さを測定し、これらの測定値の差を、ダイヤモンド圧子の侵入深さの差hとする。 In this specification, the Rockwell hardness (HRA) is a value calculated from the following formula based on JIS Z-2245.
HRA = 100-0.5h
[In the formula, h represents the difference in penetration depth h of the diamond indenter. ]
The difference in penetration depth h of the diamond indenter is obtained as follows. Using a diamond indenter with a tip radius of curvature of 0.2 mm and a cone angle of 120 °, an initial load of 98.07 N is applied to the sample surface, then a test load of 588.4 N is applied, and the initial load is applied again. The penetration depth of the diamond indenter at the initial load twice before and after is measured, and the difference between these measured values is defined as the difference h of the penetration depth of the diamond indenter.
σb=8WmaxL/πD3 In this specification, the bending strength is a value measured as follows based on JIS Z-2248. As the test piece, a round bar having a diameter D of 13 mm and a length of 300 mm is used. The bending strength measurement test is performed as a three-point bending test using a universal testing machine and a bending test apparatus attached thereto, with the distance L between the fulcrums set to 200 mm. When the load when the test piece breaks is the maximum load W max , the bending strength σ b is calculated from the following equation.
σ b = 8 W max L / πD 3
これらの高融点金属材料において、含有成分の組成を適宜選択することにより、所定のロックウェル硬度および抗折力を示す金属材料が得られる。また、鍛鋼などの製造工程において熱処理を行う高融点金属材料については、熱処理温度を適宜選択することにより、所望のロックウェル硬度および抗折力を有する材料を得ることができる。 Forged steel is a steel ingot produced by casting molten steel in a mold or a steel piece produced from the steel ingot, and forged or rolled and forged with a press and a hammer, and then heat-treated. It is a material manufactured by Known forged steel can be used, for example, forged steel containing iron as a main component and containing carbon, chromium and nickel, forged steel containing iron as a main component and containing silicon, chromium and nickel, nickel, chromium and molybdenum. Forged steel containing, forged steel containing iron as its main component and containing carbon, silicon, manganese, nickel, chromium, molybdenum and vanadium, forged steel containing iron as its main component and containing carbon, silicon, manganese, nickel, chromium and molybdenum, etc. Is mentioned.
In these refractory metal materials, a metal material exhibiting a predetermined Rockwell hardness and bending strength can be obtained by appropriately selecting the composition of the contained components. Moreover, about the high melting-point metal material which heat-processes in manufacturing processes, such as forged steel, the material which has desired Rockwell hardness and bending strength can be obtained by selecting heat processing temperature suitably.
上記のような表層部を有する金属箔加工用ローラは、金属材料が高融点金属材料である場合は、たとえば、高融点金属材料製円筒を芯用ロールに焼き嵌めまたは冷やし嵌めすることによって作製できる。焼き嵌めとは、内径が芯用ロールの外径よりも僅かに小さくなるように高融点金属材料製円筒を作製し、この高融点金属材料製円筒を暖めて膨張させ、芯用ロールに嵌め込むことである。また、冷やし嵌めとは、内径が芯用ロールの外径よりも僅かに小さくなるように作製した高融点金属材料製円筒に、冷却により収縮させた芯用ロールを嵌め込むことである。芯用ロールには、たとえば、ステンレス鋼、鉄などからなるロールを使用できる。
なお、本発明の金属箔加工用ローラは、表層部だけでなく、全体が所定のロックウェル硬度および抗折力を示す金属材料で構成されていてもよい。 In the metal foil processing roller of the present invention, the thickness of the surface layer portion containing a metal material exhibiting a predetermined Rockwell hardness and bending strength is not particularly limited, but is preferably about 5 to 50 mm.
When the metal material is a refractory metal material, the metal foil processing roller having the surface layer portion as described above can be produced, for example, by shrink-fitting or cold-fitting a refractory metal material cylinder to a core roll. . With shrink fitting, a refractory metal material cylinder is produced so that the inner diameter is slightly smaller than the outer diameter of the core roll, and the refractory metal material cylinder is warmed and expanded to fit into the core roll. That is. Further, the cold fitting is to fit the core roll, which has been contracted by cooling, into a refractory metal cylinder made so that the inner diameter is slightly smaller than the outer diameter of the core roll. As the core roll, for example, a roll made of stainless steel, iron, or the like can be used.
In addition, the roller for metal foil processing of this invention may be comprised with the metal material which not only the surface layer part but the whole shows predetermined Rockwell hardness and bending strength.
ローラ回転装置は、たとえば、ローラ支持台および駆動装置を含む。ローラ支持台は、少なくとも表層部が所定のロックウェル硬度および抗折力を有する金属材料を含有し、周面に凹部が形成されていないローラを、その軸線回りに回転自在に支持する。駆動装置は、ローラ支持台により支持されているローラ(以下、「凹部形成用ローラ」とする)を、その軸線回りに回転駆動させる。 The concave portion present on the peripheral surface of the metal foil processing roller of the present invention is formed by laser processing. That is, a conventional drilling method using a laser can be used to form the recess. For laser processing, for example, a laser processing apparatus including a roller rotating device, a laser oscillator, a processing head, a light guide path, a mask portion, and an actuator can be used.
The roller rotating device includes, for example, a roller support base and a driving device. The roller support base supports a roller having at least a surface layer portion containing a metal material having a predetermined Rockwell hardness and a bending strength and having no concave portion formed on the peripheral surface thereof, so as to be rotatable about its axis. The drive device rotates a roller (hereinafter referred to as a “recess-forming roller”) supported by a roller support base around its axis.
レーザ発振器の出力は、たとえば、50mW~200Wである。また、レーザ光の周波数は、好ましくは100Hz~100kHzである。レーザ光の照射時間は特に制限されないが、好ましくは、一回当たり10ps~200nsである。照射時間が10ps未満では、レーザ光の照射による熱伝導が発生せず、原子1層分しか取り除くことができず、凹部の形成が不十分になるおそれがある。一方、200nsを超えると、凹部形成用ローラの回転によりレーザ光が凹部形成用ローラ表面をスイープするおそれがある。 The laser oscillator is a device that outputs laser light. As the laser oscillator, a known laser oscillator can be used. For example, a solid-state laser oscillator (Nd: YAG laser, Nd) using a laser medium in which neodymium ions are mixed into a YAG crystal (yttrium, aluminum, garnet) or a YVO 4 crystal. : YVO 4 laser), and the like. In addition, a carbon dioxide laser, an excimer laser, etc. can also be used.
The output of the laser oscillator is, for example, 50 mW to 200 W. The frequency of the laser light is preferably 100 Hz to 100 kHz. The irradiation time of the laser beam is not particularly limited, but is preferably 10 ps to 200 ns per time. When the irradiation time is less than 10 ps, heat conduction due to laser light irradiation does not occur, and only one layer of atoms can be removed, and the formation of the recesses may be insufficient. On the other hand, if it exceeds 200 ns, the laser beam may sweep the surface of the recess forming roller due to the rotation of the recess forming roller.
このようなレーザ加工装置は、広く市販されている。また、ローラ回転装置を備えないレーザ加工装置においても、ローラ回転装置を所定の位置に装着することにより、凹部形成のためのレーザ加工を実施できる。 The actuator is provided vertically below the laser oscillator, the processing head, the light guide path, and the mask portion, and supports these devices and members integrally and reciprocally. The actuator reciprocates these devices and members in parallel with the longitudinal direction of the recess forming roller.
Such laser processing apparatuses are widely commercially available. Even in a laser processing apparatus that does not include a roller rotating device, laser processing for forming a recess can be performed by mounting the roller rotating device at a predetermined position.
なお、レーザ加工により凹部を形成すると、凹部のローラ周面での開口の縁に沿って隆起が形成される場合がある。このような隆起は、たとえば、研磨加工などにより除去するのが好ましい。研磨加工は公知の方法に従って実施できる。たとえば、研磨材としてダイヤモンド粒子を用い、かつ研磨パッドを備える研磨装置を用い、水などの媒体の供給下に行われる。 The laser processing device irradiates the peripheral surface of the recess forming roller with laser light continuously or intermittently, preferably intermittently, thereby forming the recess. When the concave portion is formed, the concave portion forming roller is rotated or the machining head is moved in the longitudinal direction of the concave portion forming roller by the actuator to newly form the concave portion. By repeating this operation, a concave portion is formed in a desired region of the concave portion forming roller, and the metal foil processing roller of the present invention is obtained.
When the recess is formed by laser processing, a ridge may be formed along the edge of the opening on the roller peripheral surface of the recess. Such ridges are preferably removed by, for example, polishing. Polishing can be performed according to a known method. For example, diamond particles are used as an abrasive and a polishing apparatus provided with a polishing pad is used and supplied with a medium such as water.
金属箔供給手段3は、具体的には、金属箔供給ローラである。金属箔供給ローラは、図示しない支持手段により軸線回りに回転可能に軸支されている。金属箔供給ローラの周面には、金属箔8が捲回されている。この金属箔8は、加工手段4の圧接ニップ部6に供給される。 The
The metal foil supply means 3 is specifically a metal foil supply roller. The metal foil supply roller is pivotally supported by a support means (not shown) so as to be rotatable around an axis. A
なお、金属加工用ローラ1がたわみ変形するのを防止するため、図示しないバックローラがそれぞれの金属加工用ローラ1に圧接されている。金属加工用ローラ1とバックアップローラは、互いの軸線が平行になっている。2つの金属箔加工用ローラ1の回転駆動により、金属箔8が圧接ニップ部6の入口から出口へと導かれ、金属箔8に加圧成形が施される。これにより、金属箔8の表面に凸部9が形成された凸部を有する金属箔2が得られる。 The processing means 4 includes two metal
In order to prevent the
金属箔加工用ローラ1周面における凹部1aの配列パターンは、本実施の形態では次のようになる。図4に示すように、金属箔加工用ローラ1の長手方向に複数の凹部1aがピッチP1で連なった列を1つの行単位7とする。複数の行単位7は、金属箔加工用ローラ1の円周方向にピッチP2で配列されている。ピッチP1およびピッチP2は、任意に設定できる。なお、金属箔加工用ローラ1の円周方向において、1つの行単位7と、それに隣り合う行単位7とは、凹部1aが金属箔加工用ローラ1の長手方向にずれるように配列されている。
本実施の形態では、凹部1aの長手方向のずれは0.5P1であるが、これに限定されず、任意の設定が可能である。また、本実施の形態では、金属箔加工用ローラ1周面における凹部1aの開口形状は、ほぼ円形であるが、これに限定されず、たとえば、ほぼ楕円形、ほぼ菱形、ほぼ正三角形、ほぼ正方形、ほぼ正六角形、ほぼ正八角形などでもよい。 The metal
In this embodiment, the arrangement pattern of the
In this embodiment, the longitudinal displacement of the
金属箔加工用ローラ1の直径は特に制限されないが、好ましくは30mmから200mm程度である。また、2つの金属箔加工用ローラ1の圧接圧(線圧)は特に制限されないが、好ましくは、5kN・cm~20kN・cm程度である。 The cross section of the
The diameter of the metal
また、上記のように、圧接ニップ部6に通過させて金属箔8を圧縮加工することにより、凹部1aと金属箔8の表面とで囲まれた密閉空間が形成され、この密閉空間には空気が残留する。金属箔加工用ローラ1による金属箔8への加圧力(圧接圧)が上記に示した適切な範囲にある場合、この密閉空間は、金属箔8が加工されている間維持され、凹部1aの底面と金属箔8の表面とは、残留する空気が介在することにより、非接触状態が保たれる。 In the present embodiment, the two rollers forming the press-contact nip 6 are the metal
Further, as described above, the
金属箔加工装置10によれば、金属箔8を加圧成形することにより、凸部を有する金属箔2が製造される。 The metal
According to the metal
(実施例1)
レーザ加工装置(スペクトラ・フィジックス(株)製)に、レーザ発振器としてNb:YAGレーザを装着した。加工ヘッドから出力されるレーザ光の強度を1回の照射あたり23μJに設定した。また、集光レンズおよび焦点距離を調整して、加工ヘッドの結像倍率を16倍に設定した。すなわち、加工ヘッドの結像サイズは、レーザ加工用マスクの開口の1/16倍になる。レーザ加工用マスクとしては、厚さ0.3mm、寸法22mm×22mmのステンレス鋼板(SUS304)に放電加工を施し、形状がほぼ菱形であるレーザ通過孔を形成したものを用いた。レーザ通過孔の菱形の開口径(長い方の対角線の長さ)は、0.32mmであった。短い方の対角線の長さは0.16mmであった。 Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.
Example 1
An Nb: YAG laser was mounted as a laser oscillator in a laser processing apparatus (Spectra Physics Co., Ltd.). The intensity of the laser beam output from the processing head was set to 23 μJ per irradiation. Further, the focusing lens and focal length were adjusted, and the imaging magnification of the processing head was set to 16 times. That is, the imaging size of the processing head is 1/16 times the opening of the laser processing mask. As the laser processing mask, a stainless steel plate (SUS304) having a thickness of 0.3 mm and dimensions of 22 mm × 22 mm was subjected to electric discharge machining to form a laser passage hole having a substantially rhombus shape. The diamond-shaped opening diameter of the laser passage hole (the length of the longer diagonal line) was 0.32 mm. The length of the shorter diagonal line was 0.16 mm.
超硬合金製ローラ(富士ダイス(株)製、直径50mm、幅100mm、ロックウェル硬度:AスケールでHRA90.0、抗折力:3.1GPa、炭化タングステン粒子およびコバルト(結着剤)を含有)を用いる以外は、実施例1と同様にして本発明の金属箔加工用ローラを作製した。
この金属箔加工用ローラ2本を金属箔加工装置10に装着し、圧接ニップ部における圧力を約14.7kN・cm(1500kgf/cm)から約9.8kN・cm(1000kgf/cm)に変更する以外は、実施例1と同様にして、幅80mm、厚み26μmのタフピッチ銅箔を加工した。加工後の銅箔表面には、金属箔加工用ローラの凹部に対応する凸部が形成されていた。レーザ顕微鏡(VK-9500)での測定による凸部10個の平均高さは、6.5μmであった。銅箔を100m/1巻として10巻で1000m加工を行ったが、銅箔表面に形成された凸部の形状はほぼ均一で、凸部高さは6.7μmであった。また、加工後の金属箔加工用ローラの表面をレーザ顕微鏡で観察した結果、クラックやチッピングの発生は認められなかった。引き続き銅箔を累計2000m加工した。銅箔表面に形成された凸部の形状は初期とほぼ同等で、凸部の高さは6.5μmであった。なお、金属箔加工用ローラの表面を顕微鏡で観察した結果、一部に炭化タングステン粒子が脱落したチッピング箇所が認められた。 (Example 2)
Cemented carbide roller (Fuji Dice Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 90.0, bending strength: 3.1 GPa, tungsten carbide particles and cobalt (binder) The metal foil processing roller of the present invention was produced in the same manner as in Example 1 except that (1) was used.
The two metal foil processing rollers are mounted on the metal
超硬ローラ(富士ダイス株式会社製、直径50mm、幅100mm、ロックウェル硬度:AスケールでHRA89.0、抗折力:3.3GPa、炭化タングステン粒子およびコバルト(結着剤)を含有)を用いる以外は実施例1と同様にして本発明の金属箔加工用ローラを作製した。
この金属箔加工用ローラ2本を金属箔加工装置10に装着し、圧接ニップ部における圧力を約14.7kN・cm(1500kgf/cm)から約9.8kN・cm(1000kgf/cm)に変更する以外は、実施例1と同様にして、幅80mm、厚み26μmのタフピッチ銅箔を加工した。加工後の銅箔表面に、金属箔加工用ローラの凹部に対応する凸部が形成されていた。レーザ顕微鏡(VK-9500)で測定による凸部10個の平均高さは、6.3μmであった。さらに、銅箔を100m/1巻として20巻で2000m加工を行ったところ、銅箔表面に形成された凸部の形状は初期とほぼ同じで、凸部10個の平均高さは6.4μmであった。加工後の金属箔加工用ローラの表面を顕微鏡で観察した結果、クラックやチッピングの発生は認められなかった。 (Example 3)
Carbide roller (Fuji Dice Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 89.0, bending strength: 3.3 GPa, containing tungsten carbide particles and cobalt (binder)) is used. A metal foil processing roller of the present invention was produced in the same manner as in Example 1 except for the above.
The two metal foil processing rollers are mounted on the metal
鍛鋼ローラ(大同マシナリー(株)製、直径50mm、幅100mm、ロックウェル硬度:AスケールでHRA83.9、抗折力:5.5GPa)を用いる以外は実施例1と同様にして本発明の金属箔加工用ローラを作製した。鍛鋼の組成は重量比率で、炭素1.1%、シリコン0.22%、マンガン0.38%、クロム1.76%および残部鉄であった。
この金属箔加工用ローラ2本を金属箔加工装置10に装着し、圧接ニップ部における圧力を約9.8kN・cm(1000kgf/cm)から約19.6kN・cm(2000kgf/cm)に変更する以外は、実施例1と同様にして、幅80mm、厚み26μmのタフピッチ銅箔を加工した。加工後の銅箔表面には、金属箔加工用ローラの凹部に対応する凸部が形成されていた。レーザ顕微鏡(VK-9500)での測定による凸部10個の平均高さは、5.8μmであった。さらに、銅箔を100m/1巻として20巻で2000m加工を行ったところ、銅箔表面に形成された凸部の形状は初期とほぼ同じで、凸部10個の平均高さは5.7μmであった。加工後の金属箔加工用ローラの表面を顕微鏡で観察した結果、クラックやチッピングは生じていなかった。 Example 4
The metal of the present invention is the same as in Example 1 except that a forged steel roller (Daido Machinery Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 83.9, bending strength: 5.5 GPa) is used. A foil processing roller was produced. The composition of the forged steel was, by weight, 1.1% carbon, 0.22% silicon, 0.38% manganese, 1.76% chromium and the balance iron.
The two metal foil processing rollers are mounted on the metal
ダイス鋼ローラ(大同マシナリー(株)製、直径50mm、ローラ幅100mm、ロックウェル硬度:AスケールでHRA81.2、抗折力:5.8GPa)を用いる以外は実施例1と同様にして本発明の金属箔加工用ローラを作製した。ダイス鋼の組成は、炭素1.4%、シリコン0.4%、マンガン0.6%、クロム11.2%、モリブデン0.9%、バナジウム0.3%および残部鉄であった。
この金属箔加工用ローラ2本を金属箔加工装置10に装着し、実施例4と同様にして、幅80mm、厚み26μmのタフピッチ銅箔を加工した。加工後の銅箔表面には、金属箔加工用ローラの凹部に対応する凸部が形成されていた。レーザ顕微鏡(VK-9500)での測定による凸部10個の平均高さは、4.9μmであった。さらに、銅箔を100m/1巻として20巻で2000m加工を行ったところ、銅箔表面に形成された凸部の形状は初期とほぼ同じで、凸部10個の平均高さは5.0μmであった。加工後の金属箔加工用ローラの表面を顕微鏡で観察した結果、クラックやチッピングは生じていなかった。 (Example 5)
The present invention is the same as that of Example 1 except that a die steel roller (Daido Machinery Co., Ltd., diameter 50 mm, roller width 100 mm, Rockwell hardness: H scale 81.2, bending strength: 5.8 GPa) is used. A metal foil processing roller was prepared. The composition of the die steel was carbon 1.4%, silicon 0.4%, manganese 0.6%, chromium 11.2%, molybdenum 0.9%, vanadium 0.3% and the balance iron.
The two metal foil processing rollers were mounted on the metal
超硬合金ローラ(富士ダイス(株)製、直径50mm、幅100mm、ロックウェル硬度:AスケールでHRA94.0、抗折力:1.5GPa、炭化タングステン粒子およびコバルト(結着剤)を含有)を用いる以外は実施例1と同様にして金属箔加工用ローラを作製した。この金属箔加工用ローラ周面の凹部は、開口形状および開口径にばらつきが認められた。特に開口形状は、ほぼ菱形のものも認められたが、楕円形状のものが多数認められた。 (Comparative Example 1)
Cemented carbide roller (Fuji Dice Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 94.0, bending strength: 1.5 GPa, containing tungsten carbide particles and cobalt (binder)) A metal foil processing roller was produced in the same manner as in Example 1 except that was used. Variations in the opening shape and the opening diameter of the recesses on the peripheral surface of the metal foil processing roller were recognized. In particular, the shape of the opening was almost diamond-shaped, but many were elliptical.
ダイス鋼ローラ(大同マシナリー(株)製、直径50mm、幅100mm、ロックウェル硬度:AスケールでHRA78.0、抗折力:8GPa)を用いる以外は実施例1と同様にして本発明の金属箔加工用ローラを作製した。ダイス鋼の組成は、炭素0.4%、シリコン1.1%、マンガン0.5%、クロム5.0%、モリブデン1.0%、バナジウム1.0%および残部鉄であった。この金属箔加工用ローラ周面の凹部は、開口形状および開口径にばらつきが認められた。特に開口形状は、ほぼ菱形のものも認められたが、楕円形状のものが多数認められた。 (Comparative Example 2)
The metal foil of the present invention was the same as in Example 1 except that a die steel roller (Daido Machinery Co., Ltd., diameter 50 mm, width 100 mm, Rockwell hardness: A scale HRA 78.0, bending strength: 8 GPa) was used. A processing roller was produced. The composition of the die steel was carbon 0.4%, silicon 1.1%, manganese 0.5%, chromium 5.0%, molybdenum 1.0%, vanadium 1.0% and the balance iron. Variations in the opening shape and the opening diameter of the recesses on the peripheral surface of the metal foil processing roller were recognized. In particular, the shape of the opening was almost diamond-shaped, but many were elliptical.
また、ロックウェル硬度がAスケールでHRA81.2以下または抗折力が3GPa以下である金属材料を含有する金属箔加工用ローラを用いると、ローラが扁平化し、圧接ニップ部における圧力を高めても、銅箔に高さ3μm以上の凸部を形成できないことが明らかである。さらに、ロックウェル硬度がAスケールでHRA90.0以上または抗折力6GPa以上である金属材料を含有する金属箔加工用ローラを用いると、チッピングが生じて凹部が変形し、ロール表面が荒れるため、安定して加工が出来ないことがわかった。 From the results of Examples 1 to 5 and Comparative Examples 1 and 2, using the metal foil processing roller of the present invention, a convex portion having a height of 4 μm or more and a substantially uniform shape with respect to a copper foil of 1000 m or more, It is clear that it can be stably formed in units of tens of millions. The metal foil processing roller of the present invention has a concave portion formed on a roller containing a metal material having a Rockwell hardness of A scale of HRA 81.2 to 90.0 and a bending strength of 3 GPa to 6 GPa. Is.
Further, when a metal foil processing roller containing a metal material having a Rockwell hardness of A scale and HRA of 81.2 or less or a bending strength of 3 GPa or less is used, the roller is flattened and the pressure at the pressure nip portion is increased. It is clear that a convex part having a height of 3 μm or more cannot be formed on the copper foil. Further, when a metal foil processing roller containing a metal material having a Rockwell hardness of A scale of HRA 90.0 or more or a bending strength of 6 GPa or more is used, chipping occurs and the concave portion is deformed, and the roll surface becomes rough. It was found that stable processing was not possible.
Claims (9)
- レーザ加工により周面に複数の凹部が形成された金属箔加工用ローラであって、少なくとも凹部の形成される表層部が、ロックウェル硬度がAスケールでHRA81.2~90.0であり、かつ抗折力が3GPa~6GPaである金属材料を含有する金属箔加工用ローラ。 A metal foil processing roller having a plurality of recesses formed on a peripheral surface by laser processing, wherein at least a surface layer portion on which the recesses are formed has a Rockwell hardness of A scale of HRA 81.2 to 90.0, and A metal foil processing roller containing a metal material having a bending strength of 3 GPa to 6 GPa.
- 金属箔加工用ローラの周面に垂直な方向における凹部の断面形状が、金属箔加工用ローラ周面から凹部の底面に向けて、断面幅が徐々にまたは連続的に小さくなるテーパ形状である請求項1に記載の金属箔加工用ローラ。 The cross-sectional shape of the recess in the direction perpendicular to the peripheral surface of the metal foil processing roller is a tapered shape in which the cross-sectional width gradually or continuously decreases from the peripheral surface of the metal foil processing roller to the bottom surface of the recess. Item 2. The metal foil processing roller according to Item 1.
- 金属箔加工用ローラ周面における凹部の開口形状が、ほぼ円形、ほぼ楕円形、ほぼ菱形またはほぼ正多角形である請求項1に記載の金属箔加工用ローラ。 2. The metal foil processing roller according to claim 1, wherein the opening shape of the concave portion on the peripheral surface of the metal foil processing roller is a substantially circular shape, a substantially oval shape, a substantially rhombus shape, or a substantially regular polygon shape.
- 金属箔加工用ローラ周面における凹部の開口径が1μm~35μmである請求項1に記載の金属箔加工用ローラ。 2. The metal foil processing roller according to claim 1, wherein the opening diameter of the concave portion on the peripheral surface of the metal foil processing roller is 1 μm to 35 μm.
- 金属箔加工用ローラ周面における該ローラ軸線方向の凹部のピッチが4μm以上である請求項1に記載の金属箔加工用ローラ。 2. The metal foil processing roller according to claim 1, wherein the pitch of the concave portions in the roller axial direction on the peripheral surface of the metal foil processing roller is 4 μm or more.
- 金属材料のロックウェル硬度がAスケールでHRA83.9~89.0である請求項1に記載の金属箔加工用ローラ。 2. The metal foil processing roller according to claim 1, wherein the Rockwell hardness of the metal material is HRA 83.9 to 89.0 on an A scale.
- 金属材料の抗折力が3.3GPa~5.5GPaである請求項1に記載の金属箔加工用ローラ。 2. The metal foil processing roller according to claim 1, wherein the bending strength of the metal material is 3.3 GPa to 5.5 GPa.
- 金属材料が超硬合金、サーメット、ハイス鋼、ダイス鋼および鍛鋼よりなる群から選ばれる少なくとも1種の高融点金属材料である請求項1に記載の金属箔加工用ローラ。 The metal foil processing roller according to claim 1, wherein the metal material is at least one refractory metal material selected from the group consisting of cemented carbide, cermet, high-speed steel, die steel, and forged steel.
- 凹部の底面と、金属箔の表面とが接触しないように用いられる請求項1に記載の金属箔加工用ローラ。
The metal foil processing roller according to claim 1, wherein the roller is used so that the bottom surface of the recess does not contact the surface of the metal foil.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200880108869A CN101808758A (en) | 2007-12-28 | 2008-11-21 | Roller for machining metal foil |
KR1020107006431A KR101196152B1 (en) | 2007-12-28 | 2008-11-21 | Metal foil machining roller |
EP08866559A EP2228147A1 (en) | 2007-12-28 | 2008-11-21 | Roller for machining metal foil |
US12/679,154 US20100255970A1 (en) | 2007-12-28 | 2008-11-21 | Metal foil machining roller |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2007-339157 | 2007-12-28 | ||
JP2007339157A JP4960215B2 (en) | 2007-12-28 | 2007-12-28 | Metal foil negative electrode current collector processing roller and metal foil negative electrode current collector processing method |
Publications (1)
Publication Number | Publication Date |
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WO2009084148A1 true WO2009084148A1 (en) | 2009-07-09 |
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ID=40823884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2008/003428 WO2009084148A1 (en) | 2007-12-28 | 2008-11-21 | Roller for machining metal foil |
Country Status (6)
Country | Link |
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US (1) | US20100255970A1 (en) |
EP (1) | EP2228147A1 (en) |
JP (1) | JP4960215B2 (en) |
KR (1) | KR101196152B1 (en) |
CN (1) | CN101808758A (en) |
WO (1) | WO2009084148A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009160593A (en) * | 2007-12-28 | 2009-07-23 | Panasonic Corp | Roller for working metal foil |
Families Citing this family (6)
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JP5822669B2 (en) | 2011-02-18 | 2015-11-24 | Jx日鉱日石金属株式会社 | Copper foil for producing graphene and method for producing graphene using the same |
JP5850720B2 (en) * | 2011-06-02 | 2016-02-03 | Jx日鉱日石金属株式会社 | Copper foil for producing graphene and method for producing graphene |
JP6078024B2 (en) | 2014-06-13 | 2017-02-08 | Jx金属株式会社 | Rolled copper foil for producing a two-dimensional hexagonal lattice compound and a method for producing a two-dimensional hexagonal lattice compound |
MX2018004512A (en) | 2015-10-14 | 2018-08-01 | Novelis Inc | Engineered work roll texturing. |
JP2017100149A (en) * | 2015-11-30 | 2017-06-08 | Jfeスチール株式会社 | Hard metal work roll and method for utilization thereof |
JP5963184B1 (en) * | 2016-03-29 | 2016-08-03 | フレキシースクラム株式会社 | Restraint material, processing apparatus using the same, and conveying apparatus |
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US4841611A (en) * | 1986-07-14 | 1989-06-27 | Kawasaki Steel Corporation | Work roll with dulled surface having geometrically patterned uneven dulled sections for temper rolling |
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DE4137337A1 (en) * | 1991-11-13 | 1993-05-19 | Sengewald Karl H Gmbh | HIGH PRESSURE METHOD AND APPLICATION DEVICE FOR ITS IMPLEMENTATION |
KR20050121759A (en) * | 2003-05-20 | 2005-12-27 | 쇼와 덴코 가부시키가이샤 | Rolling apparatus and method of making product of miscellaneous cross section with use of same |
JP4960215B2 (en) * | 2007-12-28 | 2012-06-27 | パナソニック株式会社 | Metal foil negative electrode current collector processing roller and metal foil negative electrode current collector processing method |
-
2007
- 2007-12-28 JP JP2007339157A patent/JP4960215B2/en not_active Expired - Fee Related
-
2008
- 2008-11-21 KR KR1020107006431A patent/KR101196152B1/en not_active IP Right Cessation
- 2008-11-21 WO PCT/JP2008/003428 patent/WO2009084148A1/en active Application Filing
- 2008-11-21 US US12/679,154 patent/US20100255970A1/en not_active Abandoned
- 2008-11-21 EP EP08866559A patent/EP2228147A1/en not_active Withdrawn
- 2008-11-21 CN CN200880108869A patent/CN101808758A/en active Pending
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JPS6310013A (en) | 1986-06-30 | 1988-01-16 | Kawasaki Steel Corp | Dull roll for cold rolling |
JPH04228210A (en) * | 1990-05-07 | 1992-08-18 | Aluminum Co Of America <Alcoa> | Method for rolling metallic material and method for adjusting surface of rolling roll |
JPH10166010A (en) | 1996-12-10 | 1998-06-23 | Nippon Steel Corp | Roll for rolling steel strip of continuous cold rolling mill |
JP2002155336A (en) * | 2000-11-15 | 2002-05-31 | Fuji Dies Kk | Grooving roll for strip for manufacture of heat transfer tube |
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JP2009160593A (en) * | 2007-12-28 | 2009-07-23 | Panasonic Corp | Roller for working metal foil |
Also Published As
Publication number | Publication date |
---|---|
JP4960215B2 (en) | 2012-06-27 |
US20100255970A1 (en) | 2010-10-07 |
KR20100080770A (en) | 2010-07-12 |
KR101196152B1 (en) | 2012-10-30 |
CN101808758A (en) | 2010-08-18 |
EP2228147A1 (en) | 2010-09-15 |
JP2009160593A (en) | 2009-07-23 |
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