# US 11,440,147 B2 · Method of manufacturing cutting tool

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- Number: US 11,440,147 B2
- Document ID: US11440147B2
- Status: Granted
- Kind: B2
- Application number: 16/800,261
- Filed: 2020-02-25
- Published: 2020-08-27
- Granted: 2022-09-13
- Earliest claimed: 2019-02-25
- Assignees: National University Corporation Tokai National Higher Education and Research System; Nagoya Institute of Technology
- Applicants: National University Corporation Tokai National Higher Education and Research System; Nagoya Institute of Technology
- Inventors: Eiji Shamoto; Fumihiro Itoigawa
- Web page: https://patentgrep.com/patent/US11440147B2

## CPC

- B23K 26/402: involving non-metallic material, e.g. isolators
- B23P 15/24: dies (B21C3/18, B21C25/10, B21D37/20 take precedence)
- B23B 27/14: Cutting tools of which the bits or tips {or cutting inserts} are of special material
- B23D 63/00: Dressing the tools of sawing machines or sawing devices for use in cutting any kind of material, e.g. in the manufacture of sawing tools
- B23D 63/008: {using computer control means}
- B23D 63/08: Sharpening the cutting edges of saw teeth
- B23D 65/00: Making tools for sawing machines or sawing devices for use in cutting any kind of material
- B23K 26/0006: {taking account of the properties of the material involved (B23K26/32, B23K26/40 take precedence)}
- B23K 26/082: Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
- B23K 26/0876: {in at least two axial directions}
- B23K 26/355: {Texturing}
- B23K 26/362: Laser etching
- B23K 26/38: by boring or cutting
- B23K 26/50: Working by transmitting the laser beam through or within the workpiece
- B23P 15/28: cutting tools (sawing tools B23D63/00, B23D65/00; files or rasps B23D73/00)
- B23B 2226/31: Diamond
- B23K 2101/20: Tools
- B23K 2101/34: Coated articles {; Surface treated articles}
- B23K 2103/50: {Inorganic materials other than metals or composite materials}
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)
- B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q)

## Abstract

A controller performs a first process of scanning a cylindrical irradiation region including a focused spot of laser light emitted from a laser light emitter to machine a flank face side of a workpiece to manufacture a cutting tool having a plurality of cutting edges arranged in line. In the first process, the controller scans the cylindrical irradiation region along a scanning path that has periodicity and changes a machining depth to form the plurality of cutting edges. The controller further performs a second process of scanning the cylindrical irradiation region including the focused spot of the laser light emitted in a direction different from an irradiation direction of the laser light in the first process to machine a rake face side of the workpiece.

## Claims

### Claim 1

A method of manufacturing a cutting tool having a plurality of cutting edges arranged in line by machining a workpiece, the method comprising:
a process of scanning a cylindrical irradiation region including a focused spot of laser light that has been emitted in an irradiation direction to machine a flank face side of the workpiece, wherein
in the process, the cylindrical irradiation region is scanned along a scanning path that has periodicity and changes a machining depth to form the plurality of cutting edges, and
the scanning path having periodicity results from alternately connecting a first path on which the cylindrical irradiation region is moved relative to the workpiece in a direction in which the machining depth increases and a second path on which the cylindrical irradiation region is moved relative to the workpiece in a direction in which the machining depth decreases, the irradiation direction of the laser light being different between the first path and the second path.

### Claim 2 (depends on 1)

The method of manufacturing a cutting tool according to claim 1, wherein
in the process, the plurality of cutting edges are formed to have cutting edge tips arranged at equal intervals.

### Claim 3 (depends on 1)

The method of manufacturing a cutting tool according to claim 1, wherein the scanning path is a periodic wavy path.

### Claim 4 (depends on 1)

The method of manufacturing a cutting tool according to claim 1, wherein the workpiece is a material that results from diamond-coating a tool base material.