WO2020183883A1 - 切断方法 - Google Patents

切断方法 Download PDF

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Publication number
WO2020183883A1
WO2020183883A1 PCT/JP2020/000527 JP2020000527W WO2020183883A1 WO 2020183883 A1 WO2020183883 A1 WO 2020183883A1 JP 2020000527 W JP2020000527 W JP 2020000527W WO 2020183883 A1 WO2020183883 A1 WO 2020183883A1
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WO
WIPO (PCT)
Prior art keywords
cutting
annular blade
work material
cutting edge
tip
Prior art date
Application number
PCT/JP2020/000527
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
隆 安富
亜暢 小林
Original Assignee
日本製鉄株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本製鉄株式会社 filed Critical 日本製鉄株式会社
Priority to PH1/2021/552127A priority Critical patent/PH12021552127A1/en
Priority to KR1020217032058A priority patent/KR102758451B1/ko
Priority to SG11202109802T priority patent/SG11202109802TA/en
Priority to CN202080020242.0A priority patent/CN113557099B/zh
Priority to JP2021505542A priority patent/JP7299524B2/ja
Publication of WO2020183883A1 publication Critical patent/WO2020183883A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D19/00—Shearing machines or shearing devices cutting by rotary discs
    • B23D19/04—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs
    • B23D19/06—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs with several spaced pairs of shearing discs working simultaneously, e.g. for trimming or making strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
    • B23D35/005—Adjusting the position of the cutting members
    • B23D35/007—Adjusting the position of the cutting members for circular cutting members
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D

Definitions

  • the present invention relates to a method for cutting a work material.
  • the surface-treated work piece 5 cut using the shearing tool 10 as shown in FIG. 13 has a cut end face as shown in FIG.
  • the cut end surface of the work material 5 is composed of a sagging surface, a sheared surface and a fracture surface.
  • the sagging occurs when the punch 12 shown in FIG. 13 is pushed from the upper surface side to the lower surface side of the work material 5 against the work material 5 in which the surface of the metal material 5a which is the base material is coated with the coating layer 5b. , Deformation caused by the tensile force acting on the upper surface of the work piece 5.
  • the sheared surface is a smooth surface formed by the movement of the punch 12 sunk into the work material 5, and the fracture surface is a surface at which the work material 5 is broken starting from a crack generated in the work material 5. is there.
  • the coating layer 5b remains on the sagging portion, but hardly remains on the sheared surface, and the metal material 5a is exposed on the fracture surface.
  • the corrosion resistance of the sheared surface and the fracture surface where the metal material 5a is almost exposed on the cut end surface of the work material 5 is low, and there is a concern that red rust may occur.
  • a rust preventive measure for the cut end surface of a plated metal plate having a plated metal layer on the surface of a metal material sacrificial anticorrosion or chemical formation with a plated metal layer is common.
  • the size of the sagging of the cut end face is within the range of 0.10 times or more of the plate thickness in the plate thickness direction and 0.45 times or more of the plate thickness in the plane direction. It is disclosed that the cutting process is performed.
  • the tensile force and shearing force applied to the metal material are increased, the plated metal layer coated on the surface of the base metal material is made to wrap around the cut end face, and at least a part of the sheared surface of the cut end face is plated metal. Cover with a layer.
  • the sacrificial anticorrosion action of the plated metal layer that wraps around the cut end face suppresses the occurrence of red rust on the cut end face.
  • Patent Document 2 discloses a method of cutting a surface-treated steel sheet with a rotary blade shifted up and down and then treating the end face using a forming roll.
  • Patent Document 3 describes a cutting method in which a V-shaped groove is formed in a steel sheet having a plating layer in the first step, and the steel sheet is cut by applying strain along the groove formed in the second step. It is disclosed.
  • Patent Document 4 discloses an apparatus in which three sets of rotary blades having different heights and widths of cutting edges are arranged in a tandem shape and a strip-shaped material is gradually sheared.
  • JP-A-2017-87294 Japanese Unexamined Patent Publication No. 2018-075600 Japanese Unexamined Patent Publication No. 2004-34183 JP-A-61-125718
  • the plated metal layer on the surface of the base metal material only covers at least a part of the sheared surface of the cut end face, and the base metal material remains exposed in the fracture surface. Therefore, the corrosion resistance of the cut end face of the plated metal plate is not sufficient. Further, in general, when an attempt is made to impart excessive sacrificial corrosion resistance to the cut end face for the purpose of rust prevention, the plating on the surface of the plated metal plate is reduced, and the surface corrosion resistance (that is, flat corrosion resistance) on the surface of the plated metal plate is lowered. Resulting in.
  • the plating coverage is increased by two processes, that is, the cutting process of the surface-treated steel sheet and the molding of the end face portion of the cut surface-treated steel sheet.
  • the equipment cost increases.
  • the construction method described in Patent Document 2 after cutting the surface-treated steel sheet with a rotary blade shifted up and down, the shape of the end face portion thereof is adjusted, so that stress is applied in different directions in each process. The plating layer is prone to cracking and peeling. Further, in the construction method described in Patent Document 2, it is necessary to pour more plating layers from the surface side in order to cover the end face of the steel plate which is the base material.
  • Patent Document 4 a cutting device for the purpose of obtaining a strip-shaped body having a beautiful and neat side edge by cutting without causing burrs, sagging, debris peeling, etc. on the cut surface. Proposed.
  • Patent Document 4 does not pay attention to the durability of the cutting edge of the annular blade. Further, in order to achieve the purpose, optimization of the cross-sectional tip radius of the cutting edge of the cutting device has not been studied.
  • the cutting device includes a first annular blade portion and a second annular blade.
  • the first cutting edge on the outer edge of the first annular cutting edge and the second cutting edge on the outer edge of the second annular cutting edge have a pair of cutting edges, and the radial cross-sectional shape is V-shaped.
  • the work material may be a multi-layer material in which the surface of the base material is covered with a coating material.
  • it may be gradually reduced tip angle theta 2 of the first cutting edge of the tip angles theta 1 and the second cutting edge in the cutting step.
  • the distance S between the first blade edge and the second cutting edge in the first cutting process, the tip radius of the first cutting edge R 1, the second when the tip radius of the blade edge defined R 2, the thickness of the workpiece and t may satisfy the following equation (1). (R 1 + R 2 ) ⁇ S ⁇ ⁇ t- (R 1 + R 2 ) ⁇ ... (1)
  • the shaving width of the work material is the distance between one end of the work material and the cutting position of the work material
  • the shaving width D of the work material is the tip radius of the first annular blade portion R. 1
  • the tip radius of the second annular edge portion R 2 when the thickness of the workpiece is defined as t, may be set so as to satisfy the following formula (2).
  • R Min (R 1 , R 2 )
  • Shift amount L D of the annular edge portion in the sheet passing direction is not less 1mm or more, in one cutting process, may be cut only one place workpiece.
  • the distance W between adjacent blades in the plate width direction may be 200 mm or more.
  • the diameter of the first annular blade portion and the second annular blade portion may be 50 mm or more.
  • the present invention when cutting a work material, it is possible to suppress a decrease in the performance of the work material after cutting.
  • the function can be exhibited on the cut end face while maintaining the function of the covering material on the flat surface of the base material.
  • FIG. 4 It is a schematic diagram of the two roll portions of the upper rotating portion when the cutting device shown in FIG. 4 is viewed in a plan view.
  • it is a front photograph of a cut end face of a plated metal material cut by a cutting device.
  • it is a side sectional photograph of a cut end face of a plated metal material cut by a cutting device.
  • It is an enlarged image of the cut end face of the work material of Example 3.
  • It is explanatory drawing which shows an example of the conventional shearing tool. It is explanatory drawing which shows typically the cut end face of the work material cut by the shearing tool of FIG.
  • FIG. 1 is an explanatory diagram showing an example of the cutting device 100 according to the present embodiment.
  • FIG. 2 is a cross-sectional view taken along the line II of the cutting device 100 shown in FIG.
  • FIG. 3 is a partially enlarged view of the upper rotating portion 110 and the lower rotating portion 120 of the cutting device 100 according to the present embodiment.
  • the upper rotating portion 110 and the lower rotating portion 120 show only half of the rotation center.
  • the plate width direction of the material to be processed is described as the X direction, the plate length direction as the Y direction, and the plate thickness direction as the Z direction.
  • the Y direction is also the through plate direction of the work material.
  • the cutting device 100 is a device that cuts the surface-treated work material 5 (see FIGS. 3 and 7) by a pair of rotating blades.
  • a surface treatment material having a coating layer (coating layer 5b in FIG. 7) on the surface of a metal material (metal material 5a in FIG. 7) as a base material will be taken up.
  • Examples of such a work material 5 include a plated metal plate in which the surface of the metal plate is plated, a coated metal plate in which the surface is coated on a metal material as a base material, and a film laminated on the metal plate. There are film-laminated metal plates and the like.
  • the cutting device 100 may include a plurality of a pair of blade portions, and may include three pairs of blade portions 1, 2, and 3, as shown in FIG. 1, for example.
  • the pair of blade portions 1, 2, and 3 are composed of a first annular blade portion 111, 112, 113 and a second annular blade portion 121, 122, 123, respectively.
  • the paired first annular blade portion and the second annular blade portion are the tips 111b, 112b, 113b of the cutting edges 111a, 112a, 113a, 121a, 122a, 123a on the outer edge thereof.
  • 121b, 122b, 123b are arranged so as to face each other.
  • the radial cross-sectional shapes of the first annular blade portions 111, 112, 113 and the second annular blade portions 121, 122, 123 have a V-shape at the cutting edges 111a, 112a, 113a, 121a, 122a, 123a.
  • the first annular blade portions 111, 112, 113 are supported by the first shaft portion 115 at the center of rotation.
  • the second annular blade portions 121, 122, and 123 are supported by the second shaft portion 125 at the center of rotation.
  • the first shaft portion 115 can be rotated via the chocks 105a and 105b
  • the second shaft portion 125 can be rotated via the chocks 107a and 107b by a pair of support portions 103a and 103b at both ends, respectively. (Chock 105a and 107a are not shown).
  • the pair of support portions 103a and 103b are provided on the gantry 101 in FIG.
  • Sleeves 131, 133 may be provided between the support portions 103a and 103b together with the first annular blade portions 111, 112, 113 and the second annular blade portions 121, 122, 123.
  • the sleeves 131 and 133 are members for adjusting the distance between the first annular blade portions 111, 112 and 113 and the distance between the second annular blade portions 121, 122 and 123.
  • sleeves 131 and 133 having different widths are provided in FIG. 1, only sleeves having the same width are used, and the intervals between the first annular blade portions 111, 112, 113 and the second annular blade portions 121 are used. , 122, 123 may be adjusted.
  • first annular blade portions 111, 112, 113 and the sleeves 131, 133 supported by the first shaft portion 115 are also referred to as an upper rotating portion 110.
  • second annular blade portions 121, 122, 123 and the sleeves 131, 133 supported by the second shaft portion 125 are also referred to as a lower rotating portion 120.
  • the upper rotating portion 110 rotates integrally with the first shaft portion 115.
  • the lower rotating portion 120 rotates integrally with the second shaft portion 125.
  • the pair of support portions 103a and 103b can be moved in the plate width direction (X direction) by the drive portions 104a and 104b, respectively.
  • the pair of support portions 103a and 103b are screwed into the threaded portions 102a and 102b installed in parallel with the first shaft portion 115 and the second shaft portion 125.
  • One end of the threaded portions 102a and 102b is connected to the driving portions 104a and 104b.
  • the drive portions 104a and 104b By driving the drive portions 104a and 104b to rotate the screw portions 102a and 102b, the support portions 103a and 103b move.
  • the reduction device 109a is used as an interval adjusting portion for adjusting the distance between the first annular blade portions 111, 112, 113 and the second annular blade portions 121, 122, 123, respectively.
  • 109b are provided. By tightening the reduction devices 109a and 109b, the distance between the first annular blade portions 111, 112, 113 and the second annular blade portions 121, 122, 123 can be narrowed.
  • the coating layer on the surface of the work material 5 penetrates into the cut end face, and the cut end face is covered with the coating layer. That is, the cutting edge 111a (112a, 113a) and the second annular blade of the first annular blade portion 111 (112, 113) with respect to the work material 5 when passing between the upper rotating portion 110 and the lower rotating portion 120.
  • the coating layer on the surface of the work material 5 is made to follow the movement of the cutting edge 121a (122a, 123a) of the portion 121 (122, 123), and the coating layer is inserted into the cut end face. As a result, the cut end face of the work material 5 is covered with the coating layer.
  • the cutting device according to the present embodiment is not limited to the configuration shown in FIG.
  • the cutting device 100A may have a configuration in which the upper rotating portion 110A and the lower rotating portion 120A are separated into two roll portions supported by the supporting portions 103a and 103b, respectively. ..
  • An annular blade portion 111 is provided on one roll portion of the upper rotating portion 110A, and an annular blade portion 113 is provided on the other roll portion.
  • An annular blade portion 121 is provided on one roll portion of the lower rotating portion 120A, and an annular blade portion 123 is provided on the other roll portion. Similar to the cutting device 100 shown in FIG.
  • such a cutting device 100A also causes the coating layer on the surface of the work material to follow the movements of the annular blade portions 111, 113, 121, 123 when cutting the work material. , Let the coating layer penetrate into the cut end face. As a result, the cut end face of the work material is covered with the coating layer.
  • the annular blade portion 113 shown in FIG. 5 is adjusted in the installation position on the first shaft portion 115b by the sleeves 131 and 135 having different lengths in the axial direction (Y direction) of the first shaft portion 115b.
  • the sleeve 131 has a longer axial length than the sleeve 135.
  • the sleeve 131, the annular blade portion 113, and the sleeve 135 are provided with respect to the first shaft portion 115b in this order from the support portion 103b side.
  • a stopper 137 is fastened to the tip of the first shaft portion 115b (the end opposite to the support portion 103b), and the sleeve 131, the annular blade portion 113, and the sleeve 135 are fixed to the first shaft portion 115b.
  • the lower side of FIG. 5 shows the installation position of the annular blade portion 113 when the positions of the sleeve 131 and the sleeve 135 are exchanged from the state of the upper side of FIG. From FIG. 5, by adjusting the installation positions of the sleeves 131 and 135 having different lengths, the position of the annular blade portion 113 in the axial direction can be adjusted.
  • a cutting device in which a plurality of annular blade portions are provided in one roll portion is a double-edged roll 1110 having two annular blade portions 1111 and 1112 at both ends in the axial direction of the shaft portion 1113, as shown in FIG. It can be configured by providing it in place of the annular blade portion 111 of the above.
  • the double-edged roll 1110 is used, when one of the annular blades used for cutting the work material is worn, the double-edged roll 1110 is inverted so that the other annular blade cuts the work material. By re-installing, the work material can be continuously cut. This makes it possible to reduce the frequency of re-polishing the annular blade portion.
  • FIG. 7 shows an example of the cut end face of the work piece 5 cut by the cutting device 100.
  • FIG. 7 schematically shows a cross section of the side surface of the cut end surface of the work material 5 (that is, the surface viewed from the plate length direction (Y direction)).
  • the cut end surface of the work piece 5 is composed of sagging s1 and s2, inclined surfaces s3 and s4, and fracture surface s5.
  • the sagging s1 and the inclined surface s3 are formed by the first cutting edge of the first annular blade portion of the pair of blades, and the sagging s2 and the inclined surface s4 are formed by the second cutting edge of the second annular blade portion. Will be done.
  • the fracture surface s5 is formed by breaking the work material 5 starting from a crack generated in the work material 5 by the first cutting edge and the second cutting edge.
  • the work material 5 cut by the cutting device 100 according to the present embodiment is cut because the same coating layer 5b continuous at the same time as cutting covers the surface of the metal material 5a to the cut end face.
  • the end face is hard to oxidize. Therefore, by cutting the work material 5 using the cutting device 100 according to the present embodiment, it is possible to provide the work material 5 having high corrosion resistance on the cut end face.
  • the shape of the cut end face of the workpiece 5 cut by the cutting device 100 according to the present embodiment is due to the shapes of the first cutting edge and the second cutting edge. Since the first cutting edge and the second cutting edge have a V shape, the cut end surface of the work piece 5 has a V shape as shown in FIG. 7 instead of the vertical shear plane shown in FIG. It has a shape having inclined surfaces s3 and s4 along the slope of. Therefore, for example, the cut end face of the work piece 5 cut by the cutting device 100 of FIG. 1 has a shape that protrudes toward the center in the plate thickness direction.
  • the fracture surface s5 is a surface formed by breaking the work material 5 due to cracks, it is difficult to allow the coating layer 5b to penetrate into the fracture surface s5.
  • the workpiece 5 is cut along the slope until the cutting is performed in a state where the tip of the first cutting edge and the tip of the second cutting edge are substantially in contact with each other. Therefore, the fracture surface s5 has a small proportion of the fracture surface s5 in the cut end face. Therefore, even if the fracture surface s5 is not covered with the coating layer 5b, the corrosion resistance is not significantly reduced.
  • the shape of the first cutting edge and the second cutting edge V-shaped like the cutting device 100 according to the present embodiment it is possible to cut a material having a tensile strength of 200 MPa or more, for example. ..
  • a material having a tensile strength of 270 MPa or more and a material having a tensile strength of 590 MPa or more can be cut.
  • the shift amount L D of the annular blade portion of the cutting distance W and sheet passing direction of the workpiece (Y direction) by appropriately setting, thick
  • the material can also be cut, and for example, a work material having a plate thickness of 2.0 mm or more can be cut.
  • the plate thickness of the material to be processed is preferably in the range of 2.0 mm or more and 9.0 mm or less, and more preferably in the range of 2.0 mm or more and 6.0 mm or less.
  • the first cutting edge of the first annular blade portion and the second cutting edge of the second annular blade portion have the same V-shape as shown in FIG.
  • the first cutting edge and the second cutting edge may be at least V-shaped, and preferably satisfy the following shapes, respectively.
  • the shape of the cutting edge will be described focusing on the pair of blades including the first annular blade 111 and the second annular blade 121 in FIG. 3, but the other pair of blades (first). The same applies to the annular blade portion 112 and the second annular blade portion 122, the first annular blade portion 113 and the second annular blade portion 123).
  • the tip angle of the cutting edge of the first annular blade portions 111, 112, 113 is ⁇ 1
  • the tip radius is R 1
  • the tip angle of the cutting edge of the second annular blade portions 121, 122, 123 is ⁇ 2, the tip.
  • the radius will be described as R 2 .
  • Tip angle theta 2 of the tip angles theta 1 and the second cutting edge 121a of the first cutting edge 111a is preferably set to 10 ° or more less than 120 °.
  • the tip angles ⁇ 1 and ⁇ 2 are 10 ° or more, the inclination becomes large, so that the followability of the coating layer 5b is improved and the corrosion resistance of the cut end face is further improved. Further, the stress applied to the first cutting edge 111a and the second cutting edge 121a is reduced, damage to the cutting edge is suppressed, and the durability of the annular blade portions 111 and 112 is improved.
  • the tip angle theta 2 of the tip angles theta 1 and the second cutting edge 121a of the first cutting edge 111a is set to 10 ° or more 120 ° or less, more preferably 30 ° to 90 °.
  • Tip radius R 2 of the tip radius R 1 and a second cutting edge 121a of the first cutting edge 111a is preferably less 35.0% 0.5% or more the thickness t.
  • the tip radii R 1 and R 2 are 0.5% or more of the plate thickness t, the stress applied to the first cutting edge 111a and the second cutting edge 121a does not become too large, and damage to the cutting edges 111a and 121a is suppressed. , Durability is improved. Further, when the tip radii R 1 and R 2 are 35.0% or less of the plate thickness t, the shape of the cut end face becomes good.
  • tip radius R 2 of the tip radius R 1 and a second cutting edge 121a of the first cutting edge 111a is not more than 35.0% 0.5% or more of the plate thickness t, and more preferably a thickness of t 3 It shall be 0.0% or more and 10.0% or less.
  • the first cutting edge 111a and the second cutting edge 121a may have different shapes. For example, if at least one of the tip radius R 1 and R 2 or the tip angles ⁇ 1 and ⁇ 2 is different, the first cutting edge 111a and the second cutting edge 121a have different shapes.
  • the fracture surface ratio is the ratio of the fracture surface s5 to the plate thickness t of the work material 5.
  • the ratio of the tip radius R 1 of the first cutting edge 111a and the tip radius R 2 of the second cutting edge 121a is preferably less than 100, more preferably It shall be less than 10.
  • the most preferable case is when the tip radii R 1 and R 2 are equal.
  • the ratio between the tip angle theta 2 of the tip angle theta 1 and the second cutting edge 121a of the first cutting edge 111a is preferably less than 4, more preferably 2 Less than.
  • the most preferable case is when the tip angles ⁇ 1 and ⁇ 2 are equal.
  • the position of the tip 111b of the first cutting edge 111a and the position of the tip 121b of the second cutting edge 121a are in the horizontal direction orthogonal to the direction in which the first annular blade portion 111 and the second annular blade portion 121 face each other. In the plate width direction (X direction), they may be matched as shown in FIG.
  • the force applied to the cutting edges 111a and 121a in the X direction can be reduced and the durability is improved. ..
  • cracks can be generated from the cutting edge at an appropriate timing to complete cutting.
  • the position of the tip 111b of the first cutting edge 111a and the position of the tip 121b of the second cutting edge 121a may be displaced by the amount x in the horizontal direction.
  • the deviation amount x of the tip position means the distance between the tip 111b of the first cutting edge 111a and the tip 121b of the second cutting edge 121a in the horizontal direction (plate width direction, X direction).
  • the amount of deviation of the tip position is preferably 50% or less of the plate thickness t. When the amount of deviation of the tip position is 50% or less of the plate thickness t, the work piece 5 can be cut so as to surely obtain the desired end surface properties.
  • first annular blade portion 111 and the second annular blade portion 121 of the pair of blade portions may be arranged symmetrically with respect to the work material.
  • the cutting width D of the work material 5 refers to the length at which the work material 5 should be left in the plate length direction (X direction) from the cutting position at the time of cutting by the cutting device 100.
  • the cutting width D of the work material 5 is represented by the length from the cutting position to one end of the work material 5, for example, as shown in FIG.
  • the cutting width D of the work material 5 is, for example, the work material 5.
  • the length may be the length from the end to the tip position of the blade on the side closer to the end.
  • the cutting width D of the work material 5 is equal to or more than the tip radius R of the annular blade portion and is 5 times or less (R ⁇ D ⁇ 5 t) of the plate thickness t of the work material 5, especially the plate thickness t of the work material 5. It is preferably 3 times or less of (R ⁇ D ⁇ 3t). More preferably, the cutting width D of the work material 5 is three times or more the tip radius R of the annular blade portion and is not more than the plate thickness t of the work material 5 (3R ⁇ D ⁇ t).
  • the tip radius R of the annular blade portion is a tip radius R 2 of the first annular edge 111, 112, 113 tip radius R 1 or second annular blade portion 121, 122 and 123.
  • FIG. 8 shows an example of the relationship between the cutting width D and the fracture surface ratio.
  • a galvanized steel sheet having a plate thickness of 3.2 mm and a tensile strength of 460 MPa was used as the work material 5.
  • the tip radius R of the cutting device 100 was 0.05 mm, and the tip angle ⁇ was 60 °.
  • the two plots at the same cutting width D show the fracture surface ratios measured for the two pieces of work piece 5 cut by the cutting device 100.
  • the shapes of the first annular blade portions 111, 112, 113 and the second annular blade portions 121, 122, 123, the first annular blade portions 111, 112, 113 and the second annular blade portions 121 By changing the amount of deviation of the tip positions from 122 and 123 or the cutting width D of the work material 5, the shape of the cut end face of the work material 5 cut by the cutting device 100 changes, and the shape of the cut end face of the cut end face changes.
  • the coating state of the coating layer 5b changes.
  • the shapes of the first annular blade portions 111, 112, 113 and the second annular blade portions 121, 122, 123, the first annular blade portions 111, 112, 113 and the second annular blade portions 121, 122, The amount of deviation of the tip position from 123 and the cutting width D of the work material 5 may be appropriately set according to the shape of the cut end face or the corrosion resistance required for the work material 5 after cutting.
  • first annular blade portions 111, 112, 113 and the second annular blade portions 121, 122, 123 may have different V-shapes to improve the flatness of the cut end face.
  • the roll diameters of the annular blade portion 111 of 1 and the second annular blade portion 121 are 50 mm or more, preferably 400 mm or more. The larger the roll diameter, the more difficult it is for the plating to be extruded in the plate-passing direction of the work material 5 during cutting, so that the amount of plating coating on the inclined surface can be increased.
  • the upper limit of the roll system is not particularly limited, but may be 3000 mm in consideration of the size of the cutting device 100 or the work piece 5.
  • the cutting distance W which is the distance between the blades adjacent to each other in the plate width direction (X direction), is preferably 200 mm or more. It shall be 500 mm or more. If the cutting distance W is 200 mm or more, even if two or more cut points are cut in one cutting step, the cut points of the work material 5 are sufficiently separated from each other, so that there is no escape place for the material. It is possible to eliminate the breakage defect due to.
  • the upper limit of the cutting distance W is not particularly limited, but may be 10000 mm in consideration of the size of the cutting device 100 or the work piece 5.
  • the workpiece 5 when the distance W between cuttings cannot be sufficiently secured, it is preferable to cut the workpiece 5 at only one place in one cutting step. If the material 5 to be processed is cut at two or more places in one cutting step, the material cannot escape due to the pushing of the cutting edge. That is, a pressure stress field is formed between the blades, and the work piece 5 is less likely to break. Therefore, by shifting the annular blade portion adjacent to the plate width direction (X direction) in the plate passing direction (Y direction), it is possible to prevent cutting at two or more locations in one cutting process. Therefore, the work piece 5 can be reliably cut.
  • FIG. 9 shows a schematic view of the two roll portions of the upper rotating portion 110A of the cutting device 100A shown in FIG. 4 in a plan view.
  • the amount of deviation LD is preferably 1 mm or more, more preferably 4 mm or more.
  • the height h 2 of the heights h 1 and the second cutting edge 121a of the first cutting edge 111a is at least the sum of these (h 1 + h 2) may be larger than the thickness t of the workpiece 5.
  • the material 5 to be processed by the cutting device 100 may be cut by one cutting step or by a plurality of cutting steps.
  • Cutting by a plurality of cutting steps means cutting the work piece 5 into two pieces by performing a cutting step of passing the work material 5 between a pair of blades a plurality of times.
  • the pair of blades 1 performs the first cutting step
  • the pair of blades 2 performs the second cutting step
  • the pair of blades 3 performs the third cutting.
  • a plurality of cutting steps may be carried out, such as carrying out the steps.
  • a plurality of cutting devices may be installed in the plate-through direction of the material to be processed so that a plurality of cutting steps can be performed by one plate-passing. By installing the cutting device in a tandem shape in this way, a plurality of cutting steps can be efficiently performed.
  • various cut end faces can be realized. For example, when cutting the workpiece 5 by a plurality of cutting process, so as to gradually reduce the tip angle theta 2 of the tip angles theta 1 and the second cutting edge 121a of the first cutting edge 111a at the cutting step May be good. As a result, the portion covered by the coating layer 5b on the cut end face can be increased, and a good end face shape can be obtained.
  • the distance between the first annular blade portion 111 and the second annular blade portion 121 in each cutting process should be gradually reduced.
  • the coating layer 5b can follow the movements of the first cutting edge 111a and the second cutting edge 121a. Increase.
  • the distance S between the first annular blade portion 111 and the second annular blade portion 121 in the first cutting step is the following formula (1). It is preferable to satisfy the relational expression of. More preferably, the distance S between the first annular blade portion 111 and the second annular blade portion 121 in the first cutting step satisfies the following formula (1-2).
  • the first step in each cutting step is performed. may be gradually increased tip angle theta 2 of the tip angles theta 1 and the second cutting edge 121a of the cutting edge 111a.
  • FIG. 10 shows a front photograph of the cut end face of the plated metal material cut by the cutting device.
  • FIG. 11 shows a side sectional photograph of the cut end face of the plated metal material cut by the cutting device.
  • FIGS. 10 and 11 as Examples 1 to 3, a front photograph and a side cross-sectional photograph of the cut end face of the plated metal material when the plated metal material is cut by the cutting device 100 of the present invention shown in FIG. Is shown.
  • Pieces A and B in FIG. 10 show two pieces of plated metal material separated by cutting with a cutting device.
  • FIG. 11 is a frontal photograph of the piece A and the piece B shown in FIG. 10 at the center position in the longitudinal direction.
  • the tip radii R 1 and R 2 of the cutting edge are different, but the cut end face is formed by sagging, an inclined surface and a fracture surface, and the inclined surface is formed.
  • the ratio was large.
  • Plating remained on the inclined surface, and the amount of plating covering the inclined surface decreased from the surface of the metal material toward the center of the plate thickness.
  • the tip radii R 1 and R 2 of the cutting edge are larger than those in Example 1
  • the reduction rate of the amount of plating from the surface of the metal material to the vicinity of the center of the plate thickness on the inclined surface is small and more.
  • the plating of was following. For example, FIG.
  • FIG. 12 shows an enlarged image of the cut end face of the work material of Example 3. As shown in FIG. 12, it can be seen that the inclined surface of the work material is coated with a coating layer on the surface of the metal material. In this way, by cutting the plated metal material using the cutting device of the present invention, it is possible to cover the cut end face by plating over a wide range.
  • the material to be processed is a plated steel sheet, but the present invention is not limited to such an example.
  • the work material may be formed by covering the surface of the base material with a coating material.
  • a metal material such as a steel plate may be used as a base material, and a material made of Zn, Al or an alloy thereof, an oxide film, a coating material, a resin material or the like may be used as a coating material.
  • the work material may be a coated steel sheet whose surface is coated on a metal material as a base material, or a film-laminated steel sheet in which a film is laminated on the steel sheet.
  • the cut product can be produced from a clad material composed of a base material and a coating material.
  • the clad material include a Ni clad copper material having a Cu plate as a base material and a Ni plate as a coating material.
  • the material to be processed is not limited to only one layer, and may be coated with a plurality of layers.
  • the surface of the above-mentioned plated steel sheet may be subjected to chemical conversion treatment, painting, laminating or the like.
  • a processed material obtained by using a resin material such as plastic as a base material and a metal material such as Cu, Cr, Ag, Au, Pt as a coating material is also cut in the same manner. Can be formed.
  • the purpose required when cutting is different depending on the combination with the material to be processed and the application.
  • the corrosion resistance, chemical resistance, and the like of the base material of the cut end face can be improved.
  • the electrical conductivity, thermal conductivity, magnetism, etc. of a part or the whole of the cut end face can be improved as compared with the conventional cutting method.
  • the cutting method according to the present embodiment it is possible to prevent the performance of the work material from being deteriorated after cutting in the cutting of the work material. This applies not only to cutting the surface-treated work material, but also to cutting the bare material. For example, by using the cutting method according to the present embodiment, it is possible to suppress a decrease in the fatigue life of the cut work material regardless of the presence or absence of the covering material.
  • the cutting device may cut the material to be processed in a curved shape, and may cut into an arbitrary shape such as a circular shape.
  • a cutting method for cutting a work material that has been surface-treated using a cutting device has a pair of blades including a first annular blade and a second annular blade.
  • the first cutting edge on the outer edge of the first annular blade and the second cutting edge on the outer edge of the second annular blade have a V-shaped radial cross section.
  • the first annular blade portion and the second annular blade portion are arranged so that the tip position of the first cutting edge and the tip position of the second cutting edge coincide with each other (1).
  • the cutting width of the work material is the distance between one end of the work material and the cutting position of the work material.
  • the cutting width D of the work material is defined as R 1 for the tip radius of the first annular blade portion, R 2 for the tip radius of the second annular blade portion, and t for the plate thickness of the work material.
  • the cutting method described in the section. (13) The cutting method according to (12) above, wherein when the cutting device is provided with a plurality of the pair of blades, the distance W between the blades adjacent to each other in the plate width direction is 500 mm or more. (14) The cutting method according to any one of (1) to (13) above, wherein the diameter of the first annular blade portion and the second annular blade portion is 50 mm or more. (15) The cutting method according to (14) above, wherein the diameter of the first annular blade portion and the second annular blade portion is 400 mm or more. (16) The above (1) to (15), wherein the rotation speed of the first annular blade portion and the rotation speed of the second annular blade portion are set to a speed different from the transfer speed of the work material.
  • a support portion that rotatably supports both ends of the first shaft portion and the second shaft portion, and An interval adjusting portion for adjusting the distance between the first annular blade portion and the second annular blade portion, With The first cutting edge on the outer edge of the first annular blade and the second cutting edge on the outer edge of the second annular blade face each other and each has a V-shaped radial cross section.
  • a cutting device in which the distance between the first annular blade portion and the second annular blade portion is adjusted by the spacing adjusting portion according to the plate thickness of the work material.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Shearing Machines (AREA)
  • Milling Processes (AREA)
PCT/JP2020/000527 2019-03-12 2020-01-09 切断方法 WO2020183883A1 (ja)

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PH1/2021/552127A PH12021552127A1 (en) 2019-03-12 2020-01-09 Cutting method
KR1020217032058A KR102758451B1 (ko) 2019-03-12 2020-01-09 절단 방법
SG11202109802T SG11202109802TA (en) 2019-03-12 2020-01-09 Cutting method
CN202080020242.0A CN113557099B (zh) 2019-03-12 2020-01-09 切断方法
JP2021505542A JP7299524B2 (ja) 2019-03-12 2020-01-09 切断方法

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JPS5722857A (en) * 1980-07-15 1982-02-05 Kawasaki Steel Corp Hot cutting method for continuously cast ingot
JPS57106459A (en) * 1980-12-22 1982-07-02 Kawasaki Steel Corp Cutter for ingot
JPS61125719A (ja) * 1984-11-22 1986-06-13 Oiles Ind Co Ltd 軸受の基礎材となる巾の狭い小帯状材を製造する方法
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SG11202109802TA (en) 2021-10-28
KR20210136073A (ko) 2021-11-16
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CN113557099A (zh) 2021-10-26
KR102758451B1 (ko) 2025-01-23
PH12021552127A1 (en) 2022-08-15
CN113557099B (zh) 2024-10-29

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