WO2018092195A1 - 切削工具 - Google Patents
切削工具 Download PDFInfo
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- WO2018092195A1 WO2018092195A1 PCT/JP2016/083859 JP2016083859W WO2018092195A1 WO 2018092195 A1 WO2018092195 A1 WO 2018092195A1 JP 2016083859 W JP2016083859 W JP 2016083859W WO 2018092195 A1 WO2018092195 A1 WO 2018092195A1
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- WIPO (PCT)
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- cutting
- cutting tool
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- boron nitride
- cubic boron
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/148—Composition of the cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/06—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of threaded articles, e.g. nuts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/18—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing
- B23B27/20—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing with diamond bits or cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1009—Ball nose end mills
- B23C5/1018—Ball nose end mills with permanently fixed cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1054—T slot cutters
- B23C5/1063—T slot cutters with permanently fixed cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1081—Shank-type cutters, i.e. with an integral shaft with permanently fixed cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/18—Milling-cutters characterised by physical features other than shape with permanently-fixed cutter-bits or teeth
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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
- B23D77/00—Reaming tools
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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
- B23D77/00—Reaming tools
- B23D77/02—Reamers with inserted cutting edges
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/062—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on B4C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/12—Boron nitride
- B23B2226/125—Boron nitride cubic [CBN]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/31—Diamond
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/03—Cutting heads comprised of different material than the shank irrespective of whether the head is detachable from the shank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/04—Angles
- B23C2210/0407—Cutting angles
- B23C2210/0442—Cutting angles positive
- B23C2210/045—Cutting angles positive axial rake angle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/12—Boron nitride
- B23C2226/125—Boron nitride cubic [CBN]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/31—Diamond
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2240/00—Details of connections of tools or workpieces
- B23C2240/08—Brazed connections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
-
- 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
- B23D2277/00—Reaming tools
- B23D2277/02—Cutting head and shank made from two different components which are releasably or non-releasably attached to each other
-
- 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
- B23D2277/00—Reaming tools
- B23D2277/04—Cutting angles
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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
- B23D2277/00—Reaming tools
- B23D2277/24—Materials of the tool or the intended workpiece, methods of applying these materials
- B23D2277/2435—Cubic boron nitride [CBN]
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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
- B23D2277/00—Reaming tools
- B23D2277/24—Materials of the tool or the intended workpiece, methods of applying these materials
- B23D2277/2442—Diamond
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
- C22C2026/003—Cubic boron nitrides only
Definitions
- This disclosure relates to a cutting tool.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-263328
- Patent Document 2 A cutting tool described in Kaihei 3-10707
- the reamer described in Patent Document 1 has a shank, a blade diameter portion, and a cutting blade body.
- the blade diameter portion extends from the shank.
- the shank and the blade diameter part are made of cemented carbide or steel.
- a cutting blade body is joined to the tip of the blade diameter portion.
- the cutting blade is formed of a sintered body of diamond or cubic boron nitride particles.
- a blade groove blade and a blade groove are formed on the outer periphery of the blade diameter portion and the cutting blade body.
- the blade groove blade and the blade groove are formed in a spiral shape around the central axis.
- the blade grooves are arranged between the blade grooves.
- the cutting tool described in Patent Document 2 has a tool body and a cutting edge tip.
- the cutting edge tip is fixed to the tool body.
- the cutting edge tip is a sintered body of diamond particles, high-pressure phase boron nitride particles, or a mixture thereof.
- JP 2000-263328 A Japanese Patent Laid-Open No. 3-10707
- the cutting tool according to the present disclosure includes a shank portion, a joint portion, and a cutting portion attached to the shank portion via the joint portion.
- the cutting part has a core part and a surface part.
- the surface portion covers the outer peripheral surface of the core portion by being arranged around the central axis of the cutting portion.
- the surface portion includes a cutting edge.
- the cutting edge is formed in a spiral shape around the central axis on the outer peripheral surface of the surface portion.
- the surface portion is a composite sintered body including a hard phase composed of a plurality of diamond particles and a plurality of cubic boron nitride particles and a binder phase constituting the balance.
- FIG. 1 is a side view of the cutting tool according to the first embodiment.
- FIG. 2 is a perspective view of the cutting tool according to the first embodiment.
- 3 is a cross-sectional view taken along the line II-II in FIG.
- FIG. 4 is a cross-sectional view of a cutting portion of a cutting tool according to a first modification of the first embodiment.
- FIG. 5 is a cross-sectional view of a cutting portion of a cutting tool according to a second modification of the first embodiment.
- FIG. 6 is a process diagram for explaining the manufacturing method of the cutting tool according to the first embodiment.
- Ni nickel (Ni) -based heat-resistant alloys and the like are difficult-to-cut materials.
- the wear resistance, fracture resistance and heat resistance of the cutting tool are required.
- the cutting blade in the reamer described in Patent Document 1 is formed of a sintered body of diamond particles or cubic boron nitride particles.
- the diamond particles have high hardness, there is room for improvement in heat resistance (diamonds are reduced in hardness by starting carbonization at 600 ° C. or higher in air and starting to burn at 800 ° C. or higher).
- cubic boron nitride particles have high heat resistance, the reamer described in Patent Document 1 has room for improvement in terms of wear resistance and fracture resistance because the hardness is lower than that of diamond particles.
- the cutting edge tip in the cutting tool described in Patent Document 2 may be formed by a sintered body of a mixture of diamond particles and high-pressure phase boron nitride.
- the cutting edge tip in the cutting tool described in Patent Document 2 needs to be fixed to the tool body by brazing. For this reason, when the vicinity of the cutting edge tip becomes high temperature by cutting heat, the brazed portion may be melted. Therefore, the cutting tool described in Patent Document 2 has room for improvement in terms of heat resistance.
- the cutting tool according to the present disclosure provides a cutting tool that can ensure wear resistance, fracture resistance, and heat resistance even if the work material is a difficult-to-cut material.
- a cutting tool includes a shank portion, a joint portion, and a cutting portion attached to the shank portion via the joint portion.
- the cutting part has a core part and a surface part.
- the surface portion covers the outer peripheral surface of the core portion by being arranged around the central axis of the cutting portion.
- the surface portion includes a cutting edge.
- the cutting edge is formed in a spiral shape around the central axis on the outer peripheral surface of the surface portion.
- the surface portion is a composite sintered body including a hard phase composed of a plurality of diamond particles and a plurality of cubic boron nitride particles and a binder phase constituting the balance.
- the volume ratio of the hard phase in the composite sintered body may be 0.6 or more and 0.99 or less.
- the wear resistance and fracture resistance can be further improved.
- the volume ratio of the plurality of cubic boron nitride particles to the volume of the hard phase may be 0.1 or more and 0.5 or less.
- the wear resistance and fracture resistance can be further improved.
- the ratio of the volume of the plurality of cubic boron nitride particles to the volume of the hard phase may be 0.2 or more and 0.4 or less.
- the wear resistance and fracture resistance can be further improved.
- D50 of the plurality of diamond particles may be 0.3 ⁇ m or more and 5 ⁇ m or less, and D90 of the plurality of diamond particles may be 10 ⁇ m or less.
- D50 of the plurality of cubic boron nitride particles may be 0.3 ⁇ m or more and 3 ⁇ m or less, and D90 of the plurality of cubic boron nitride particles may be 5 ⁇ m or less.
- the wear resistance and fracture resistance can be further improved.
- D50 of the plurality of diamond particles may be 0.3 ⁇ m or more and 2 ⁇ m or less, and D90 of the plurality of diamond particles may be 3 ⁇ m or less.
- D50 of the plurality of cubic boron nitride particles may be 0.3 ⁇ m or more and 2 ⁇ m or less, and D90 of the plurality of cubic boron nitride may be 3 ⁇ m or less.
- the wear resistance and fracture resistance can be further improved.
- the binder phase may contain cobalt. According to the cutting tool of (7) above, the wear resistance and fracture resistance can be further improved.
- the core portion may be made of a cemented carbide containing cobalt.
- the ratio of the volume of cobalt in the cemented carbide may be 0.1 or more and 0.2 or less.
- the twist angle of the cutting edge may be not less than 35 ° and not more than 75 °.
- the wear resistance and fracture resistance can be further improved.
- the twist angle may be not less than 45 ° and not more than 70 °.
- the wear resistance and fracture resistance can be further improved.
- the twist angle may be not less than 55 ° and not more than 65 °.
- the wear resistance and fracture resistance can be further improved.
- the cutting tools (1) to (11) may further include an attachment portion that is joined to the cutting portion by the joining portion and is detachably attached to the shank portion.
- FIG. 1 is a side view of the cutting tool according to the first embodiment.
- FIG. 2 is a perspective view of the cutting tool according to the first embodiment. As shown in FIGS. 1 and 2, the cutting tool according to the first embodiment has a central axis A.
- the cutting tool according to the first embodiment has a shank portion 1, a cutting portion 2, and a joint portion 3.
- the cutting tool according to the first embodiment may have an attachment portion 4.
- the shank portion 1 is attached to the spindle of the machine tool.
- the cutting part 2 is attached to the shank part 1 via the joint part 3.
- the cutting portion 2 may be attached to the shank portion 1 via the attachment portion 4.
- the cutting part 2 is joined to the attaching part 4 by the joining part 3, and the attaching part 4 is detachably attached to the shank part 1, whereby the cutting part 2 is attached to the shank part 1.
- the cutting part 2 is attached to the shank part 1 by joining the junction part 3 to the shank part 1.
- the central axes of the shank part 1, the cutting part 2, and the attachment part 4 coincide with the central axis A.
- a material containing one or more of iron-based elements such as cobalt (Co), iron (Fe), and nickel (Ni) is used.
- a cemented carbide or cermet is used for the attachment portion 4.
- FIG. 3 is a cross-sectional view taken along the line II-II in FIG. In FIG. 3, the attachment portion 4 is shown.
- the cutting portion 2 is connected to the shank portion 1 via the joint portion 3 without providing the attachment portion 4. It may be attached as described above.
- the cutting part 2 has a core part 21 and a surface part 22.
- the core part 21 has a columnar shape.
- the core part 21 may have a cylindrical shape.
- the core part 21 has the outer peripheral surface 21a and the upper surface 21b.
- the core portion 21 is made of a cemented carbide, for example.
- the cemented carbide is an alloy obtained by sintering a hard phase such as tungsten carbide (WC) and a binder phase.
- a binder phase of the cemented carbide for example, cobalt can be used.
- the material which comprises the core part 21 is not restricted to this.
- the material constituting the core portion 21 may be, for example, cermet. Cermet is an alloy obtained by sintering a hard phase and a binder phase such as titanium carbide (TiC), tantalum carbide (TaC), niobium carbide (NbC) and the like.
- the volume ratio of the cobalt in the cemented carbide which comprises the core part 21 is 0.1 or more and 0.2 or less, for example.
- the ratio of the volume of the cobalt in the core part 21 is measured with the following method. First, in an arbitrary cross section of the core portion 21, cobalt crystal grains are specified by EDX (energy dispersive X-ray analysis). Next, the ratio of the area of cobalt crystal grains in the cross section is measured. The measured cobalt area ratio is regarded as the volume ratio of the binder phase in the cemented carbide constituting the core portion 21.
- the surface portion 22 covers the outer peripheral surface 21a of the core portion 21 by being arranged around the central axis A (that is, by being arranged around the central axis A of the cutting portion 2). From another viewpoint, the surface portion 22 is disposed on the outer peripheral surface 21 a of the core portion 21. The core portion 21 and the surface portion 22 are joined to each other.
- the surface portion 22 has a cylindrical shape.
- the surface portion 22 preferably has a cylindrical shape.
- the surface portion 22 may cover the upper surface 21 b of the core portion 21. That is, the surface portion 22 may be provided also on the upper surface 21 b of the core portion 21.
- the surface portion 22 has an outer peripheral surface 22a and an upper surface 22b.
- the upper surface 22b is, for example, a flat surface.
- the surface portion 22 has a cutting edge 22c. That is, the cutting edge 22 c is integrated with the surface portion 22.
- the cutting edge 22c is provided on the outer peripheral surface 22a.
- the cutting edge 22c is preferably formed in a spiral shape around the central axis A on the outer peripheral surface 22a.
- a plurality of cutting edges 22c may be formed. Note that the cutting edge 22 c may be formed not only on the surface portion 22 but also on other portions (for example, one or more of the core portion 21, the joint portion 3, and the attachment portion 4).
- the cutting edge 22c has a twist angle ⁇ .
- the twist angle ⁇ is an angle formed by the twisted cutting edge 22c and the central axis A.
- the twist angle ⁇ is, for example, not less than 35 ° and not more than 75 °.
- the twist angle ⁇ is preferably 45 ° or greater and 70 ° or less.
- the twist angle ⁇ is particularly preferably not less than 55 ° and not more than 65 °.
- the surface portion 22 is formed of a composite sintered body. More specifically, the surface portion 22 is a sintered body including a plurality of diamond particles, a plurality of cubic boron nitride particles, and a binder phase.
- diamond particles and cubic boron nitride particles may be collectively referred to as a hard phase.
- the binder phase constitutes the remainder of the composite sintered body excluding diamond particles and cubic boron nitride particles.
- the composite sintered body may contain inevitable impurities. The case where the composite sintered body contains inevitable impurities is also included when the binder phase constitutes the remainder of the composite sintered body excluding diamond particles and cubic boron nitride particles.
- the diamond particles preferably have a skeleton structure. That is, it is preferable that at least a part of each of the diamond particles arranged adjacent to each other in the composite sintered body is bonded to each other.
- the cobalt phase may contain cobalt.
- the binder phase may further contain, for example, nickel, molybdenum (Mo), chromium (Cr), tungsten (W), aluminum (Al), and the like.
- the binder phase may further contain titanium (Ti), zirconium (Zr), hafnium (Hf), niobium (Nb), tantalum (Ta), silicon (Si), and the like.
- the volume ratio of the hard phase in the composite sintered body is preferably 0.6 or more and 0.99 or less.
- the volume ratio of the hard phase in the composite sintered body is measured by the following method. First, in any cross section of the composite sintered body, crystal grains constituting the hard phase are specified by EDX. Next, based on said specific result, the ratio of the area of the hard phase in the said cross section is measured. And the ratio of the area of the measured hard phase is regarded as the ratio of the volume of the hard phase in the composite sintered body.
- the ratio of the volume of cubic boron nitride particles contained in the composite sintered body to the volume of the hard phase is preferably 0.1 or more and 0.5 or less.
- the ratio of the volume of cubic boron nitride particles contained in the composite sintered body to the volume of the hard phase is particularly preferably 0.2 or more and 0.4 or less.
- the ratio of the volume of cubic boron nitride particles contained in the composite sintered body to the volume of the hard phase is measured by the following method. First, diamond particles and cubic boron nitride particles are specified by EDX in an arbitrary cross section of the composite sintered body. Next, each of the areas of the hard phase and cubic boron nitride particles in the cross section is measured. Then, the value obtained by dividing the area of the cubic boron nitride particles in the cross section by the area of the hard phase is the ratio of the volume of the cubic boron nitride particles contained in the composite sintered body to the volume of the hard phase. I reckon.
- the D50 of the diamond particles contained in the composite sintered body is preferably 0.3 ⁇ m or more and 5 ⁇ m or less. It is preferable that D90 of the diamond particle contained in the composite sintered body is 10 ⁇ m or less. It is preferable that D50 of the cubic boron nitride particles contained in the composite sintered body is 0.3 ⁇ m or more and 3 ⁇ m or less. D90 of cubic boron nitride particles contained in the composite sintered body is 5 ⁇ m or less.
- the D50 of the diamond particles contained in the composite sintered body is particularly preferably 0.3 ⁇ m or more and 2 ⁇ m or less. It is particularly preferable that D90 of the diamond particles contained in the composite sintered body is 3 ⁇ m or less.
- the D50 of cubic boron nitride particles contained in the composite sintered body is particularly preferably 0.3 ⁇ m or more and 2 ⁇ m or less. It is particularly preferable that D90 of the cubic boron nitride particles contained in the composite sintered body is 3 ⁇ m or less.
- the value is D50.
- the total volume of crystal grains having a grain size smaller than a certain value is 90% of the total volume of crystal grains, the value is D90.
- the above D50 and D90 are measured by the following method.
- diamond particles (cubic boron nitride particles) are specified using EDX in an arbitrary cross section of the composite sintered body.
- the cross-sectional area of each diamond particle (cubic boron nitride particle) is calculated using image analysis software.
- the equivalent circle diameter of each diamond particle (cubic boron nitride particle) is calculated from the cross-sectional area of each diamond particle (cubic boron nitride particle).
- each diamond particle (cubic boron nitride particle) The area ratio is calculated.
- the ratio of the calculated cross-sectional area of each diamond particle (cubic boron nitride particle) is regarded as the volume ratio of each diamond particle (cubic boron nitride particle), and the calculated equivalent circle diameter is The crystal grain size of diamond particles (cubic boron nitride particles).
- the ratio of the volume of the hard phase in the composite sintered body as described above, the ratio of the volume of cubic boron nitride particles to the volume of the hard phase, D50 and D90 of the diamond particles contained in the composite sintered body, and the composite When the numerical range of D50 and D90 of cubic boron nitride particles contained in the sintered body is satisfied, a skeleton structure of diamond particles is formed in the composite sintered body.
- FIG. 4 is a cross-sectional view of the cutting portion of the cutting tool according to the first modification of the first embodiment.
- the upper surface 22b of the surface portion 22 is a curved surface.
- FIG. 5 is a cross-sectional view of a cutting portion of a cutting tool according to a second modification of the first embodiment.
- the surface portion 22 is provided with a hole 22d.
- the hole 22 d is provided on the upper surface 22 b side of the surface portion 22.
- the hole 22d has, for example, a conical shape.
- the hole 22 d may penetrate the surface portion 22 and reach the core portion 21. 4 and 5, the attachment portion 4 is shown.
- the cutting portion is not provided without the attachment portion 4. It is as above-mentioned that 2 may be attached to the shank part 1 via the junction part 3.
- FIG. 4 is a cross-sectional view of the cutting portion of the cutting tool according to the first modification of the first embodiment.
- the upper surface 22b of the surface portion 22 is a curved surface
- FIG. 6 is a process diagram for explaining the manufacturing method of the cutting tool according to the first embodiment. As shown in FIG. 6, the manufacturing method of the cutting tool which concerns on 1st Embodiment has sintering process S1, cutting edge formation process S2, and assembly process S3.
- the sintering step S1 includes a first step S11, a second step S12, and a third step S13.
- 1st process S11 the preparation of the material which comprises a composite sintered compact is performed. Specifically, a powder of diamond particles, a powder of cubic boron nitride particles, and a powder of a material constituting the binder phase are prepared. Note that the powder of the diamond particles and the powder of cubic boron nitride particles may be coated with the material constituting the binder phase without using the powder of the material constituting the binder phase.
- the diamond particle powder, the cubic boron nitride particle powder, and the material powder constituting the binder phase are mixed.
- mixing for example, ball mill mixing, bead mill mixing, planetary mill mixing, jet mill mixing, or the like is used.
- the mixture of the diamond particle powder, the cubic small boron nitride powder and the material powder constituting the binder phase mixed in the second step S12 may be referred to as mixed powder.
- the composite sintered body is sintered.
- the mixed powder obtained in the second step S12 is filled into a mold.
- the core portion 21 is pushed into the mixed powder filled in the mold.
- heating and sintering pressure are applied to the mixed powder filled in the mold.
- the composite sintered compact which comprises the surface part 22 is formed.
- the core part 21 and the surface part 22 are joined.
- the temperature of this heating is, for example, 1400 ° C. or more and 2000 ° C. or less.
- This heating temperature is preferably 1500 ° C. or higher and 1800 ° C. or lower.
- This sintering pressure is, for example, 4 GPa or more and 10 GPa or less.
- This sintering pressure is preferably 6 GPa or more and 8 GPa or less.
- the sintering time is, for example, 15 minutes or more and 60 minutes or less.
- the cutting edge 22c is formed.
- the cutting edge 22 c is formed by polishing the outer peripheral surface 22 a of the surface portion 22.
- the cutting edge 22 c may be formed by performing laser processing on the outer peripheral surface 22 a of the surface portion 22. Thereby, formation of the cutting part 2 is performed.
- the cutting tool according to the first embodiment is assembled.
- the cutting part 2 formed through the cutting edge forming step S2 is joined to the attaching part 4 by the joining part 3, and the attaching part 4 is attached to the shank part 1.
- the attachment portion 4 is attached to the shank portion 1 by, for example, screw fastening, pinning, other engagement, press fitting, brazing, or the like.
- the cutting edge 22 c is integrated with the surface portion 22. That is, in the cutting tool according to the first embodiment, the cutting edge 22c is not attached by brazing or the like. Therefore, according to the cutting tool according to the first embodiment, the periphery of the cutting edge 22c is not melted by the cutting heat, and damage around the cutting edge 22c hardly occurs.
- the surface portion 22 including the cutting edge 22c is formed of a composite sintered body.
- the hard phase in the composite sintered body is composed of diamond particles and cubic boron nitride particles. Therefore, in the cutting tool according to the first embodiment, the heat resistance, wear resistance, and fracture resistance of the cutting edge 22c are compatible. Therefore, according to the cutting tool according to the first embodiment, even if the work material is a difficult-to-cut material, it is possible to ensure wear resistance, fracture resistance, and heat resistance.
- the wear resistance and fracture resistance of the cutting tool can be further improved.
- the core portion 21 is made of a cemented carbide containing cobalt as a binder phase, and the volume ratio of cobalt in the cemented carbide is 0.1 or more and 0.2 or less. In this case, the difference in thermal expansion coefficient between the composite sintered body and the core portion 21 is reduced. Therefore, in this case, it is possible to prevent the core portion 21 from being separated from the surface portion 22.
- the work material in the first cutting test is Inconel (registered trademark) 718 which is a nickel-based heat-resistant alloy and is difficult to cut.
- cutting conditions were set such that the cutting speed V was 500 mm / second, the feed amount per blade fz was 0.05 mm / sheet, the cutting width Ae was 0.5 mm, and the cutting amount Ap was 0.3 mm.
- As the cutting oil an emulsion type cutting oil (diluted 20 times) was used.
- Table 1 shows D50 and D90 of diamond particles contained in the composite sintered bodies in the cutting tools according to Examples 1 to 12, D50 and D90 of cubic boron nitride particles contained in the composite sintered bodies, and composite firing. The volume ratio of the diamond particles and cubic boron nitride particles contained in the bonded body, the type of material to be the binder phase, and the twist angle ⁇ of the cutting edge 22c are shown. Table 1 shows the tool life when the first cutting test was performed using the cutting tools according to Examples 1 to 12.
- the tool life was evaluated by the cutting distance until the flank wear width VB reached 0.1 mm or until the cutting edge 22c was damaged.
- the life of the cutting tool according to Examples 1 to 8 is longer than that of the cutting tool according to Examples 9 to 12. In addition, the life of the cutting tools according to Examples 1 to 4 and 6 to 8 is particularly long.
- the volume ratio of the hard phase in the composite sintered body is in the range of 0.6 to 0.99, and cubic boron nitride particles with respect to the volume of the hard phase
- the volume ratio is in the range of 0.1 to 0.5.
- the D50 of the diamond particles contained in the composite sintered body is in the range of 0.3 ⁇ m to 5 ⁇ m, and the D90 of the diamond particles contained in the composite sintered body is It exists in the range of 10 micrometers or less.
- the cubic boron nitride particles contained in the composite sintered body have a D50 in the range of 0.3 ⁇ m to 3 ⁇ m, and the cubic crystals contained in the composite sintered body.
- the D90 of the boron nitride particles is in the range of 5 ⁇ m or less.
- the diamond particles contained in the composite sintered body have D50 in the range of 0.3 ⁇ m or more and 2 ⁇ m or less, and diamond contained in the composite sintered body The D90 of the particles is in the range of 3 ⁇ m or less.
- the D50 of the cubic boron nitride particles contained in the composite sintered body is in the range of 0.3 ⁇ m to 2 ⁇ m, and the cubic boron nitride particles D90 is in the range of 3 ⁇ m or less.
- the volume ratio of the hard phase in the composite sintered body is in the range of 0.6 to 0.99.
- the ratio of the volume of the cubic boron nitride particles to the volume of the hard phase is in the range of 0.1 to 0.5.
- the D50 of the diamond particles contained in the composite sintered body is not in the range of 0.3 ⁇ m or more and 5 ⁇ m or less, and cubic boron nitride particles contained in the composite sintered body. D50 is not in the range of 0.3 ⁇ m to 3 ⁇ m.
- the D50 of the diamond particles contained in the composite sintered body is not within the range of 0.3 ⁇ m or more and 5 ⁇ m or less, and the D90 of the diamond particles contained in the composite sintered body is It is not in the range of 10 ⁇ m or less, and the D50 of the cubic boron nitride particles contained in the composite sintered body is not in the range of 0.3 to 3 ⁇ m.
- the D50 of the diamond particles contained in the composite sintered body is not within the range of 0.3 ⁇ m or more and 5 ⁇ m or less, and cubic boron nitride particles contained in the composite sintered body are included. D50 is not in the range of 0.3 ⁇ m or more and 3 ⁇ m or less, and D90 of cubic boron nitride particles contained in the composite sintered body is not in the range of 5 ⁇ m or less.
- the material constituting the binder phase does not contain cobalt (the binder phase is made of aluminum).
- D50 of the diamond particles contained in the composite sintered body is in the range of 0.3 ⁇ m to 5 ⁇ m
- D90 of the diamond particles contained in the composite sintered body is in the range of 10 ⁇ m or less.
- D50 of cubic boron nitride particles contained in the composite sintered body is in the range of 0.3 ⁇ m to 3 ⁇ m
- D90 of cubic boron nitride particles contained in the composite sintered body is in the range of 5 ⁇ m or less. It was confirmed that the wear resistance and fracture resistance of the cutting tool were further improved.
- the D50 of the diamond particles contained in the composite sintered body is in the range of 0.3 ⁇ m to 2 ⁇ m, and the D90 of the diamond particles contained in the composite sintered body is in the range of 3 ⁇ m or less.
- D50 of the cubic boron nitride particles contained in the composite sintered body is in the range of 0.3 ⁇ m or more and 2 ⁇ m or less, and D90 of the cubic boron nitride particles contained in the composite sintered body is 3 ⁇ m or less. It was confirmed that the wear resistance and fracture resistance of the cutting tool are further improved by being within the range of.
- the work material in the second cutting test is Inconel (registered trademark) 718 as in the first cutting test.
- cutting conditions were set such that the cutting speed V was 500 mm / second, the feed amount per blade fz was 0.15 mm / sheet, the cutting width Ae was 0.1 mm, and the cutting amount Ap was 0.3 mm.
- As the cutting oil an emulsion type cutting oil (diluted 20 times) was used.
- Table 2 shows D50 and D90 of diamond particles contained in the composite sintered body in the cutting tools according to Examples 13 to 24, D50 and D90 of cubic boron nitride particles contained in the composite sintered body, and composite firing.
- the volume ratio of the diamond particles and cubic boron nitride particles contained in the bonded body, the type of material to be the binder phase, and the twist angle ⁇ of the cutting edge 22c are shown.
- Table 1 shows the tool life when the first cutting test was performed using the cutting tools according to Examples 13 to 24.
- the tool life was evaluated by the cutting distance until the flank wear width VB reached 0.1 mm or until the cutting edge 22c was damaged, as in the first cutting test.
- the life of the cutting tools according to Examples 13 to 20 is longer than that of the cutting tools according to Examples 21 to 24.
- the cutting tool according to Examples 13 to 16, 18 and 19 has a long life.
- D50 of diamond particles contained in the composite sintered body is in the range of 0.3 ⁇ m or more and 2 ⁇ m or less.
- D90 of the diamond particles contained in the composite sintered body is in the range of 3 ⁇ m or less.
- D50 of the cubic boron nitride particles contained in the composite sintered body is in the range of 0.3 ⁇ m or more and 2 ⁇ m or less, and is contained in the composite sintered body.
- D90 of the cubic boron nitride particles is in the range of 3 ⁇ m or less.
- the ratio of the volume of the hard phase in the composite sintered body is in the range of 0.6 to 0.99, and cubic boron nitride particles with respect to the volume of the hard phase
- the volume ratio is in the range of 0.1 to 0.5.
- the ratio of the volume of cubic boron nitride particles to the volume of the hard phase is in the range of 0.2 to 0.4.
- the volume ratio of the hard phase in the composite sintered body is not in the range of 0.6 or more and 0.99.
- the ratio of the volume of cubic boron nitride particles to the volume of the hard phase is not in the range of 0.1 to 0.5.
- the ratio of the volume of the cubic boron nitride particles to the volume of the hard phase is in the range of 0.1 to 0.5, so that the wear resistance and fracture resistance of the cutting tool are improved. Further improvement has been confirmed.
- the work material in the third cutting test is Inconel (registered trademark) 718 as in the first and second cutting tests.
- cutting conditions were set such that the cutting speed V was 500 mm / second, the feed amount per blade fz was 0.15 mm / sheet, the cutting width Ae was 0.5 mm, and the cutting amount Ap was 0.3 mm.
- As the cutting oil an emulsion type cutting oil (diluted 20 times) was used.
- Table 3 shows D50 and D90 of diamond particles contained in the composite sintered body in the cutting tools according to Examples 25 to 31, D50 and D90 of cubic boron nitride particles contained in the composite sintered body, and composite firing.
- the volume ratio of diamond particles and cubic boron nitride particles in the bonded body, the type of material to be the binder phase, and the twist angle ⁇ of the cutting edge 22c are shown.
- Table 3 shows the tool life when the third cutting test was performed using the cutting tools according to Examples 25 to 31. Each of the cutting tools according to Examples 25 to 31 is different only in the twist angle ⁇ .
- the D50 of the diamond particles contained in the composite sintered body is in the range of 0.3 ⁇ m to 2 ⁇ m, and the diamond particles contained in the composite sintered body D90 is in the range of 3 ⁇ m or less. Further, in the cutting tools according to Examples 25 to 31, the D50 of the cubic boron nitride particles contained in the composite sintered body is in the range of 0.3 ⁇ m or more and 2 ⁇ m or less, and is contained in the composite sintered body. D90 of the cubic boron nitride particles is in the range of 3 ⁇ m or less.
- the volume ratio of the hard phase in the composite sintered body is in the range of 0.6 to 0.99, and cubic boron nitride particles with respect to the volume of the hard phase
- the volume ratio is in the range of 0.1 to 0.5.
- Example 30 As shown in Table 3, when the twist angle ⁇ is small, the tool life is relatively short (Example 30). As the torsion angle ⁇ increases, the tool life tends to improve (Examples 25 to 29). However, when the torsion angle ⁇ becomes excessively large, the tool life tends to be relatively reduced (Example 31).
- the twist angle ⁇ is preferably 35 ° or more and 75 ° or more, more preferably 45 ° or more and 70 ° or less, and particularly preferably 55 ° or more and 65 ° or less. confirmed.
- the cutting tool according to the second embodiment includes a volume ratio of diamond particles in the composite sintered body, a volume ratio of cubic boron nitride in the composite sintered body, and a D50 of diamond particles contained in the composite sintered body. And D90 and the cubic boron nitride D50 and D90 contained in the composite sintered body are the same as those of the cutting tool according to the first embodiment.
- the volume ratio of diamond particles in the composite sintered body is preferably 0.3 or more and 0.94 or less. In the cutting tool according to the second embodiment, the volume ratio of diamond particles in the composite sintered body is more preferably 0.5 or more and 0.7 or less. In the cutting tool according to the second embodiment, D50 and D90 of the diamond particles contained in the composite sintered body are more preferably 10 ⁇ m or less. In the cutting tool according to the second embodiment, D50 and D90 of the diamond particles contained in the composite sintered body are more preferably 2 ⁇ m or less.
- the volume ratio of cubic boron nitride particles in the composite sintered body is preferably 0.03 or more and 0.4 or less. In the cutting tool according to the second embodiment, the volume ratio of cubic boron nitride particles in the composite sintered body is more preferably 0.1 or more and 0.4 or less. In the cutting tool according to the second embodiment, the D50 and D90 of the cubic silicon nitride particles in the composite sintered body are preferably 2 ⁇ m or less. In the cutting tool according to the second embodiment, D50 and D90 of the diamond particles in the composite sintered body are more preferably 1 ⁇ m or less.
- the volume ratio of diamond particles in the composite sintered body is measured by the following method. First, diamond particles are identified by EDX in an arbitrary cross section of the composite sintered body. Next, the ratio of the area of the diamond particles in the cross section is measured based on the above specified result. Then, the measured ratio of the area of the diamond particles is regarded as the ratio of the volume of the diamond particles in the composite sintered body. The volume ratio of cubic boron nitride particles in the composite sintered body is similarly measured.
- D50 and D90 of diamond particles are as described above.
- the manufacturing method of the cutting tool according to the second embodiment is the same as the manufacturing method of the cutting tool according to the first embodiment.
- a skeleton structure of diamond particles is formed in the composite sintered body. Therefore, according to the cutting tool according to the second embodiment, it is possible to further improve the wear resistance and fracture resistance of the cutting tool.
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Abstract
Description
一般に、ニッケル(Ni)基の耐熱合金等は、難削材とされている。難削材を高能率で転削するためには、切削工具の耐摩耗性、耐欠損性及び耐熱性が必要とされる。
本開示に係る切削工具によると、被削材が難削材であったとしても耐摩耗性、耐欠損性及び耐熱性を確保することができる。
最初に本開示の実施態様を列記して説明する。
上記(7)の切削工具によると、耐摩耗性及び耐欠損性をさらに向上させることができる。
以下に、本開示の実施形態の詳細について図を参照して説明する。なお、各図中同一または相当部分には同一符号を付している。また、以下に記載する実施の形態の少なくとも一部を任意に組み合わせてもよい。
以下に、第1実施形態に係る切削工具の構成について説明する。図1は、第1実施形態に係る切削工具の側面図である。図2は、第1実施形態に係る切削工具の斜視図である。図1及び図2に示すように、第1実施形態に係る切削工具は、中心軸Aを有している。
以下に、第1実施形態に係る切削工具の製造方法について説明する。図6は、第1実施形態に係る切削工具の製造方法を説明するための工程図である。図6に示すように、第1実施形態に係る切削工具の製造方法は、焼結工程S1と、切れ刃形成工程S2と、組立工程S3とを有している。
以下に第1実施形態に係る切削工具の効果について説明する。第1実施形態に係る切削工具においては、切れ刃22cが表面部22と一体となっている。すなわち、第1実施形態に係る切削工具においては、切れ刃22cがろう付け等により取り付けられていない。そのため、第1実施形態に係る切削工具によると、切削熱により切れ刃22cの周辺が溶融することはなく、切れ刃22c周辺の破損が生じにくい。
第1実施形態に係る切削工具のより詳細な効果を確認するため、以下の第1の切削試験、第2の切削試験及び第3の切削試験を行った。
第1の切削試験における被削材は、ニッケル基の耐熱合金で難削材であるインコネル(登録商標)718である。第1の切削試験においては、切削速度Vが500mm/秒、刃当たり送り量fzが0.05mm/枚、切込幅Aeが0.5mm、切込量Apが0.3mmとの切削条件を適用した。なお、切削油としては、エマルジョンタイプの切削油(20倍希釈)が用いられた。
第2の切削試験における被削材は、第1の切削試験と同様に、インコネル(登録商標)718である。第2の切削試験においては、切削速度Vが500mm/秒、刃当たり送り量fzが0.15mm/枚、切込幅Aeが0.1mm、切込量Apが0.3mmとの切削条件を適用した。なお、切削油としては、エマルジョンタイプの切削油(20倍希釈)が用いられた。
第3の切削試験における被削材は、第1及び第2の切削試験と同様に、インコネル(登録商標)718である。第3の切削試験においては、切削速度Vが500mm/秒、刃当たり送り量fzが0.15mm/枚、切込幅Aeが0.5mm、切込量Apが0.3mmとの切削条件を適用した。なお、切削油としては、エマルジョンタイプの切削油(20倍希釈)が用いられた。
以下に、第2実施形態に係る切削工具の構成について説明する。以下においては、第1実施形態と異なる点について主に説明し、同様の説明は繰り返さない。
第2実施形態に係る切削工具の製造方法は、第1実施形態に係る切削工具の製造方法と同様である。
第2実施形態に係る切削工具によると、複合焼結体中にダイヤモンド粒子のスケルトン構造が形成される。そのため、第2実施形態に係る切削工具によると、切削工具の耐摩耗性及び耐欠損性をさらに向上させることができる。
Claims (12)
- シャンク部と、
接合部と、
前記接合部を介して前記シャンク部に取り付けられる切削部とを備え、
前記切削部は、コア部と、前記切削部の中心軸まわりに配置されることで前記コア部の外周面を覆う表面部とを有し、
前記表面部は、前記表面部の外周面上に設けられ、かつ前記中心軸回りの螺旋状に形成された切れ刃を含み、
前記表面部は、複数のダイヤモンド粒子と複数の立方晶窒化硼素粒子とにより構成される硬質相と、残部を構成する結合相とを含む複合焼結体である、切削工具。 - 前記複合焼結体中における前記硬質相の体積の比率は、0.6以上0.99以下である、請求項1に記載の切削工具。
- 前記硬質相の体積に対する前記複数の前記立方晶窒化硼素粒子の体積の比率は、0.1以上0.4以下である、請求項1に記載の切削工具。
- 前記硬質相の体積に対する前記複数の前記立方晶窒化硼素粒子の体積の比率は、0.2以上0.4以下である、請求項3に記載の切削工具。
- 前記複数の前記ダイヤモンド粒子のD50は、0.3μm以上5μm以下であり、
前記複数の前記ダイヤモンド粒子のD90は、10μm以下であり、
前記複数の前記立方晶窒化硼素粒子のD50は、0.3μm以上3μm以下であり、
前記複数の前記立方晶窒化硼素粒子のD90は、5μm以下である、請求項1に記載の切削工具。 - 前記複数の前記ダイヤモンド粒子のD50は、0.3μm以上2μm以下であり、
前記複数の前記ダイヤモンド粒子のD90は、3μm以下であり、
前記複数の前記立方晶窒化硼素粒子のD50は、0.3μm以上2μm以下であり、
前記複数の前記立方晶窒化硼素粒子のD90は、3μm以下である、請求項5に記載の切削工具。 - 前記結合相は、コバルトを含む、請求項1に記載の切削工具。
- 前記コア部は、コバルトを含有する超硬合金で構成されており、
前記超硬合金中における前記コバルトの体積比率は、0.1以上0.2以下である、請求項1~7のいずれか1項に記載の切削工具。 - 前記切れ刃のねじれ角は35°以上75°以下である、請求項1~8のいずれか1項に記載の切削工具。
- 前記ねじれ角は45°以上70°以下である、請求項9に記載の切削工具。
- 前記ねじれ角は55°以上65°以下である、請求項10に記載の切削工具。
- 前記接合部により前記切削部に接合され、かつ前記シャンク部に着脱可能に取付けられる取付部をさらに備える、請求項1~11のいずれか1項に記載の切削工具。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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EP16921544.9A EP3375554B1 (en) | 2016-11-15 | 2016-11-15 | Cutting tool |
CA3009032A CA3009032A1 (en) | 2016-11-15 | 2016-11-15 | Cutting tool |
CN201680078022.7A CN108430681B (zh) | 2016-11-15 | 2016-11-15 | 切削工具 |
KR1020187018962A KR102188626B1 (ko) | 2016-11-15 | 2016-11-15 | 절삭 공구 |
US16/062,739 US10717134B2 (en) | 2016-11-15 | 2016-11-15 | Cutting tool |
PCT/JP2016/083859 WO2018092195A1 (ja) | 2016-11-15 | 2016-11-15 | 切削工具 |
JP2018550902A JP6841841B2 (ja) | 2016-11-15 | 2016-11-15 | 切削工具 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2016/083859 WO2018092195A1 (ja) | 2016-11-15 | 2016-11-15 | 切削工具 |
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US (1) | US10717134B2 (ja) |
EP (1) | EP3375554B1 (ja) |
JP (1) | JP6841841B2 (ja) |
KR (1) | KR102188626B1 (ja) |
CN (1) | CN108430681B (ja) |
CA (1) | CA3009032A1 (ja) |
WO (1) | WO2018092195A1 (ja) |
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CN113560646A (zh) * | 2021-08-19 | 2021-10-29 | 沈阳飞机工业(集团)有限公司 | 一种焊接结构立铣刀 |
JP2022522901A (ja) * | 2019-04-18 | 2022-04-20 | マキノ インコーポレイテッド | 多結晶質ダイヤモンドを使用してチタン合金を機械加工する方法 |
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CN109108377B (zh) * | 2018-08-22 | 2023-09-15 | 浙江廷阳智能装备有限公司 | 锯床等体积锯切系统 |
US12257637B2 (en) | 2022-03-28 | 2025-03-25 | Kennametal Inc. | Rotary cutting tool with tunable vibration absorber |
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- 2016-11-15 US US16/062,739 patent/US10717134B2/en active Active
- 2016-11-15 EP EP16921544.9A patent/EP3375554B1/en active Active
- 2016-11-15 JP JP2018550902A patent/JP6841841B2/ja active Active
- 2016-11-15 CA CA3009032A patent/CA3009032A1/en not_active Abandoned
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CN113560646B (zh) * | 2021-08-19 | 2024-04-16 | 沈阳飞机工业(集团)有限公司 | 一种焊接结构立铣刀 |
Also Published As
Publication number | Publication date |
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EP3375554B1 (en) | 2021-05-19 |
CN108430681A (zh) | 2018-08-21 |
US20180361485A1 (en) | 2018-12-20 |
US10717134B2 (en) | 2020-07-21 |
CA3009032A1 (en) | 2018-05-24 |
JP6841841B2 (ja) | 2021-03-10 |
CN108430681B (zh) | 2020-06-23 |
KR102188626B1 (ko) | 2020-12-08 |
KR20180088454A (ko) | 2018-08-03 |
EP3375554A4 (en) | 2019-10-16 |
EP3375554A1 (en) | 2018-09-19 |
JPWO2018092195A1 (ja) | 2019-02-28 |
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