Patent US3818562A successfully refreshed from Google Patents.
US3818562A
Expired / Lapsed
US
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Cutter body and blade therefor
Assignee: Carboloy Inc
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Filing: 1972-07-19
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Granted: 1974-06-25
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Expires: 1992-07-19
Abstract
Abstract An edge milling cutter body and cutter blade therefor indexable to eight cutting edges is described in this specification and the accompanying drawings. The blade pockets are positioned about the periphery of the body at a prescribed lead or corner angle, with the blades held therein generally parallel to the frusto-conical surface of the cutter body. The pockets are made such that the cutting edge of the blade will have a severe negative radial rake, a very slight negative axial rake, and a lead or corner angle such that the combination results in the blade edge having an effective cutting action of negative true rake and positive angle of inclination. The blade has a primary clearance angle extending about the periphery of each of its faces and a wiping and strengthening flat at each of the eight cutting corners.
Inventors
- 👤 R Lacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:13
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2204; B23C5/2208; B23C2200/00; B23C2200/20; B23C2200/201; B23C2200/36; B23C2200/367; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/192; Y10T407/1934; Y10T407/1936; Y10T407/195; Y10T407/22; Y10T407/2268; Y10T407/23
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
265 words
An edge cutter body adapted to receive and retain one or more cutting blades, each such blade having two spaced faces and at least four interconnecting sidewalls, said body comprising: mounting means for attaching the body to a machine tool; a generally frusto-conical section surrounding and affixed to said mounting means, said section having one or more cutting stations located on the sloped, radially outwardly facing periphery thereof: a blade pocket positioned at each of said cutting stations, each said pocket having Rear, trailing and lead locating surfaces, said lead locating surface and the faces of a blade positioned in said pocket being generally parallel to the outwardly facing periphery of said frustoconical section, said rear and trailing locating surfaces being at an angle with respect to one another of at least 90*, said surfaces providing a lead angle, a relatively extreme negative radial rake angle and a relatively slight negative axial rake angle for the cutting edge of a blade positioned in said pocket, whereby a regular polygonal blade having at least four identical sidewalls and having twice the number of indexable cutting edges that it has sidewalls generally symmetrically spaced about the center thereof can be utilized in said pocket, said rake angles, in conjunction with said lead angle providing an effective negative tube rake and positive angle of inclination for the cutting edge of said blade; and means for retaining a blade in said pocket with one of the faces thereof resting upon said lead locating surface and with two adjacent sidewalls thereof in abutment with said rear and trailing locating surfaces.
Claim 2
Dependent Claim
265 words
An edge cutter body adapted to receive and retain one or more cutting blades, each such blade having two spaced faces and at least four interconnecting sidewalls, said body comprising: mounting means for attaching the body to a machine tool; a generally frusto-conical section surrounding and affixed to said mounting means, said section having one or more cutting stations located on the sloped, radially outwardly facing periphery thereof: a blade pocket positioned at each of said cutting stations, each said pocket having Rear, trailing and lead locating surfaces, said lead locating surface and the faces of a blade positioned in said pocket being generally parallel to the outwardly facing periphery of said frustoconical section, said rear and trailing locating surfaces being at an angle with respect to one another of at least 90*, said surfaces providing a lead angle, a relatively extreme negative radial rake angle and a relatively slight negative axial rake angle for the cutting edge of a blade positioned in said pocket, whereby a regular polygonal blade having at least four identical sidewalls and having twice the number of indexable cutting edges that it has sidewalls generally symmetrically spaced about the center thereof can be utilized in said pocket, said rake angles, in conjunction with said lead angle providing an effective negative tube rake and positive angle of inclination for the cutting edge of said blade; and means for retaining a blade in said pocket with one of the faces thereof resting upon said lead locating surface and with two adjacent sidewalls thereof in abutment with said rear and trailing locating surfaces.
Claim 3
Dependent Claim
32 words
The cutter body as set forth in claim 1 which further comprises a cylindrical section containing said mounting means, said frusto-conical section being affixed to and extending forwardly from said cylindrical section.
Claim 4
Dependent Claim
87 words
In combination with the cutter body recited in claim 1, an indexable cutting blade having eight cutting edges generally symmetrically spaced about its center comprising a substantially square body portion having two spaced faces and four identical interconnecting sidewalls defining eight corners; a primary clearance angle extending about the periphery of each of said faces; and means for affixing said blade within one of said pockets with adjacent sidewalls thereof abutting said rear and trailing locating surfaces and one of said faces abutting said lead locating surfaces.
Claim 5
Dependent Claim
45 words
The blade as set forth in claim 3 which further comprises a wiping and strengthening flat at each of said corners, said flat narrowing in width progressively from the corner at which it is positioned toward the center of the sidewall along which it extends.
Claim 6
Dependent Claim
29 words
The blade as set forth in claim 4 wherein said wiping and strengthening flat is triangular and is formed along the intersection of the sidewall and primary clearance angle.
Claim 7
Dependent Claim
20 words
The blade as set forth in claim 3 wherein said clearance angle is approximately 10* with respect to said faces.
Claim 8
Dependent Claim
32 words
The blade as set forth in claim 5 wherein said wiping and strengthening flat is at an angle approximately equal to the lead angle with respect to the sidewall which it intersects.
Claim 9
Dependent Claim
20 words
The blade as set forth in claim 3 wherein said affixing means comprises an aperture centrally located in said blade.
Claim 10
Dependent Claim
88 words
In combination with the cutter body described in claim 1, an indexable cutter blade comprising: a substantially regular polygonal body portion having two spaced faces and at least four identical interconnecting sidewalls defining a series of corners spaced about the periphery of each of said faces; a wiping and strengthening flat at each of said corners, said flat narrowing progressively from the corner at which it is positioned toward the center of the sidewall along which it extends; and means for affixing said blade to said cutter body.
Claim 11
Dependent Claim
20 words
The combination of claim 9 further comprising a primary clearance angle extending about the periphery of each of said faces.
Claim 12
Dependent Claim
48 words
The combination of claim 9 wherein said rear, trailing and lead locating surfaces are mutually perpendicular and wherein said cutter blade has four interconnecting sidewalls defining, in conjunction with said spaced faces, a total of eight indexable cutting edges generally symmetrically spaced about the center of the blade.
Claim 13
Dependent Claim
30 words
The combination of claim 11 wherein said lead angle is approximately 30*, said negative radial rake angle is approximately -17.5*, And wherein said negative axial rake angle is approximately -4*.
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |