# US 9,517,514 B2 · Exchangeable head cutting tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,514 B2 - Document ID: US9517514B2 - Status: Granted - Kind: B2 - Application number: 14/237,799 - Filed: 2012-08-30 - Published: 2014-07-24 - Granted: 2016-12-13 - Earliest claimed: 2011-09-09 - Assignees: Mitsubishi Materials Corporation - Applicants: Takayuki Azegami; Taro Abe - Inventors: Takayuki Azegami; Taro Abe - Web page: https://patentgrep.com/patent/US9517514B2 ## CPC - B23C 5/006: {Details of the milling cutter body} - B23B 51/00: Tools for drilling machines - B23C 5/10: Shank-type cutters, i.e. with an integral shaft - B23C 5/22: Securing arrangements for bits or teeth {or cutting inserts} - B23D 77/02: Reamers with inserted cutting edges - B23P 15/28: cutting tools (sawing tools B23D63/00, B23D65/00; files or rasps B23D73/00) - B23C 5/26: Securing milling cutters to the driving spindle - B23C 2210/02: Connections between the shanks and detachable cutting heads - B23C 2210/03: Cutting heads comprised of different material than the shank irrespective of whether the head is detachable from the shank - B23C 2240/24: Connections using screws - B23C 2250/12: Cooling and lubrication - B23C 2270/06: Use of elastic or plastic deformation (B23C2210/161 takes precedence) - B23P 11/00: Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for (connecting sheet metal or metal tubes, rods or profiles B21D39/00; riveting B21J; soldering, unsoldering, welding B23K; hand tools for connecting wire or strip B25B25/00; connecting metal parts by adhesives F16B11/00) - Y10T 407/1932: with means to fasten tool seat to holder - Y10T 408/95: with tool-retaining means - Y10T 409/30952: with cutter holder - B23C: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement 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) - B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An exchangeable head cutting tool contains a tool main body made of a hard material and a connecting member made of a metal material having a lower hardness than the hard material. The tool main body and the connecting member are joined by inserting a cylindrical mounting portion of the connecting member into a mounting hole formed in the tool main body, and by plastically deforming the mounting portion so as to expand a diameter thereof, thereby bringing an outer peripheral surface of the mounting portion into close contact with the inner peripheral surface of the mounting hole and thus making the outer peripheral surface of the mounting portion engage with a concave portions of the tool main body. A diameter expanding member having a higher hardness than the connecting member is press-fitted into and fixed to an inner peripheral portion of the mounting portion. ## Claims ### Claim 1 An exchangeable head cutting tool comprising: a tool main body made of a hard material and having a mounting hole with concave portions in an inner peripheral surface thereof; a connecting member made of a metal material having a lower hardness than the hard material and having a cylindrical mounting portion; and a diameter expanding member having a higher hardness than the connecting member, wherein the tool main body and the connecting member are joined by inserting the cylindrical mounting portion into the mounting hole, and by plastically deforming the mounting portion so as to expand a diameter thereof, thereby bringing an outer peripheral surface of the mounting portion into close contact with the inner peripheral surface of the mounting hole and thus making the outer peripheral surface of the mounting portion engage with the concave portions in such a manner that a portion of the outer peripheral surface of the mounting portion penetrates into the concave portions due to plastic deformation, the diameter expanding member is press-fitted into and fixed to an inner peripheral portion of the mounting portion, and the mounting portion is plastically deformed by the diameter expanding member. ### Claim 2 (depends on 1) The exchangeable head cutting tool according to claim 1, wherein in the diameter expanding member, at least a portion of the diameter expanding member facing the side in the direction of press-fitting into the inner peripheral portion of the mounting portion is provided such that an outer diameter gradually reduces as it goes in a press fitting direction. ### Claim 3 (depends on 1) The exchangeable head cutting tool according to claim 1, wherein a groove is provided in the mounting portion, said groove extending in a direction of a central axis of the mounting portion. ### Claim 4 (depends on 2) The exchangeable head cutting tool according to claim 2, wherein a groove is provided in the mounting portion, said groove extending in a direction of a central axis of the mounting portion. ### Claim 5 (depends on 3) The exchangeable head cutting tool according to claim 3, wherein the groove is extended in the direction of the central axis so as to cross a position where an outer diameter of the fixed diameter expanding member in a cross section orthogonal to the central axis becomes maximum. ### Claim 6 (depends on 3) The exchangeable head cutting tool according to claim 3, wherein the groove radially penetrates from an inner surface of the mounting portion toward an outer surface thereof. ### Claim 7 (depends on 3) The exchangeable head cutting tool according to claim 3, wherein the groove is formed in a plurality at intervals in a circumferential direction. ### Claim 8 (depends on 1) The exchangeable head cutting tool according to claim 1, wherein the connecting member has a thread portion provided at a rear side in a direction of press-fitting of the diameter expanding portion. ### Claim 9 (depends on 8) The exchangeable head cutting tool according to claim 8, wherein the diameter expanding member has a diameter larger than a diameter of an inner peripheral portion of the mounting portion before plastic deformation of the connecting member and smaller than a diameter of an inner peripheral portion of the thread portion. ### Claim 10 (depends on 1) The exchangeable head cutting tool according to claim 1, wherein the diameter expanding member is fixed to the inner peripheral portion of the mounting portion without being abutted by any other components except the inner peripheral portion of the mounting portion. ### Claim 11 (depends on 3) The exchangeable head cutting tool according to claim 3, wherein the groove radially penetrates from an outer surface on one side of the mounting portion through an outer surface on the other side of the mounting portion, which is provided at an opposite position across the central axis of the mounting portion from the one outer surface.