Patent US5026227A successfully refreshed from Google Patents.
US5026227A
Expired / Lapsed
US
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Cermet solid end mill
Assignee: Kyocera Corp
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Filing: 1989-10-03
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Granted: 1991-06-25
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Expires: 2009-10-03
Abstract
Abstract A cermet solid end mill having a helix angle of 45 to 50 degrees and being composed essentially of NbC-TiC-TiN-based composition and being far superior to conventional end mills in cutting characteristics, i.e., cutting length, tool life and durability.
Inventors
- 👤 Masami Nishi
- 👤 Kiyoshi Kishimoto
- 👤 Haruo Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:55
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/02; B23C5/10; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1946; Y10T407/1948; Y10T407/1952; Y10T407/1962; Y10T407/1964; Y10T407/1966; Y10T407/27
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
105 words
A solid end mill comprising a generally cylindrical body having a central axis, a shank portion and a cutting portion attached to said shank portion, said cutting portion comprising at least one helically extending cutting edge, wherein said at least one cutting edge has a helix angle in the range of about 40 to 50 degrees, said solid end mill consisting essentially of an NbC-TaC-TiC-TiN-WC-Mo 2 C-based cermet composition comprising from greater than 0 percent to up to 50 weight percent of NbC in admixture with TaC, TiC, TiN, WC, Mo 2 C and a metal phase which is an alloy of Ni and Co.
Claim 2
Dependent Claim
105 words
A solid end mill comprising a generally cylindrical body having a central axis, a shank portion and a cutting portion attached to said shank portion, said cutting portion comprising at least one helically extending cutting edge, wherein said at least one cutting edge has a helix angle in the range of about 40 to 50 degrees, said solid end mill consisting essentially of an NbC-TaC-TiC-TiN-WC-Mo 2 C-based cermet composition comprising from greater than 0 percent to up to 50 weight percent of NbC in admixture with TaC, TiC, TiN, WC, Mo 2 C and a metal phase which is an alloy of Ni and Co.
Claim 3
Dependent Claim
88 words
A solid end mill comprising a generally cylindrical body having a central axis, a shank portion and a cutting portion attached to said shank portion, said cutting portion comprising at least one helically extending cutting edge, wherein said at least one cutting edge has a helix angle in the range of about 40 to 50 degrees, said solid end mill consisting essentially of a NbC-TaC-TiC-TiN-based cermet composition comprising from greater than 0 greater to up to 50 weight percent of NbC in admixture with TaC, TiC and TiN.
Claim 4
Dependent Claim
88 words
A solid end mill comprising a generally cylindrical body having a central axis, a shank portion and a cutting portion attached to said shank portion, said cutting portion comprising at least one helically extending cutting edge, wherein said at least one cutting edge has a helix angle in the range of about 40 to 50 degrees, said solid end mill consisting essentially of a NbC-TaC-TiC-TiN-based cermet composition comprising from greater than 0 greater to up to 50 weight percent of NbC in admixture with TaC, TiC and TiN.
Claim 5
Dependent Claim
13 words
A mill according to claim 2, wherein said helix angle is 45±2 degrees.
Claim 6
Dependent Claim
37 words
A mill according to claim 2, wherein a circular land section is provided at an end of said cutting portion distal from said shank portion to increase a cutting angle at said end of said cutting portion.
Claim 7
Dependent Claim
14 words
A mill according to claim 4, wherein said cutting angle is approximately 90 degrees.
Claim 8
Dependent Claim
17 words
A mill according to claim 2, wherein said cermet composition further comprises: WC; and Mo 2 C.
Claim 9
Dependent Claim
26 words
A mill according to claim 6, wherein the cermet composition includes 15% NbC, 15% TaC, 20% TiC, 5% TiN, 15% WC and 15% Mo 2 C.
Claim 10
Dependent Claim
48 words
A mill according to claim 6, wherein said cermet composition comprises: 10 to 50 weight- % NbC in admixture with TaC; 10 to 40 weight- % TiC; 5 to 10 weight- % TiN; 10 to 25 weight- % WC; and 5 to 20 weight- % Mo 2 C.
Claim 11
Dependent Claim
26 words
A mill according to claim 6, wherein said cermet composition further comprises a metal phase which is Ni, Co or an alloy of Ni and Co.
Claim 12
Dependent Claim
51 words
A mill according to claim 9, wherein said cermet composition comprises: about 50 weight- % NbC in admixture with TaC; about 10 weight- % TiC; about 5 weight- % TiN; about 10 weight- % WC; about 5 weight- % Mo 2 C; and about 20 weight- % of said metal phase.
Claim 13
Dependent Claim
51 words
A mill according to claim 9, wherein said cermet composition comprises: about 30 weight- % NbC in admixture with TaC; about 20 weight- % TiC; about 5 weight- % TiN; about 15 weight- % WC; about 15 weight- % Mo 2 C; and about 15 weight- % of said metal phase.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |