Patent US3736634A successfully refreshed from Google Patents.
US3736634A
Expired / Lapsed
US
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Rotary cutting tool
Assignee: HICARB CORP
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Filing: 1971-03-17
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Granted: 1973-06-05
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Expires: 1991-03-17
Abstract
Abstract An end mill is provided which comprises a cylindrical body of solid carbide material having a plurality of parallel helical flutes in the outer surface thereof. Each of the flutes is provided with a plurality of notches having root lines perpendicular to the axis of the tool body, and the root line of each notch on one of the flutes is axially offset from the root line of a notch on the preceding flute a distance such that the offset notches axially overlap one another. The offset between notches of adjacent flutes is in the same direction as the hand of the helical flutes and preferably is approximately 0.015 inch. Further, the notches are defined by walls which are inclined approximately 40* relative to the axis of the tool. The tool structure provides for extremely small chips to be removed from a workpiece against which the tool is moved, whereby the tool can be operated at an extremely high spindle speed and with an extremely high linear tool feed rate to achieve heavy metal removal from a workpiece without chipping or breakage of the tool.
Inventors
- 👤 J Sonnie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:36
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/02; B23C5/10; B23C2210/00; B23C2210/08; B23C2210/088; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1946; Y10T407/1948; Y10T407/1952; Y10T407/1956; Y10T407/1958
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
A rotary cutting tool, comprising a generally cylindrical body of solid carbide material having a plurality of helical flutes in its outer periphery, said flutes having a given hand relative to the axis of said body, each flute having a plurality of substantially V-shaped notches therein, said notches each having walls inclined at an angle of from 35* to 45* relative to said axis of said body and a root line extending perpendicular to said axis of said body, the root lines of said notches on one of said flutes each being axially offset relative to the root line of a notch on the preceding flute a distance of from 0.010 to 0.020 inch, the surface between adjacent notches on each of said flutes being from 0.025 to 0.060 inch, and said notches for a nominal tool diameter of from 1/8 to 1 inch having a depth measured from the outer surface of said body of from 0.010 to 0.045 inch.
Claim 2
Dependent Claim
161 words
A rotary cutting tool, comprising a generally cylindrical body of solid carbide material having a plurality of helical flutes in its outer periphery, said flutes having a given hand relative to the axis of said body, each flute having a plurality of substantially V-shaped notches therein, said notches each having walls inclined at an angle of from 35* to 45* relative to said axis of said body and a root line extending perpendicular to said axis of said body, the root lines of said notches on one of said flutes each being axially offset relative to the root line of a notch on the preceding flute a distance of from 0.010 to 0.020 inch, the surface between adjacent notches on each of said flutes being from 0.025 to 0.060 inch, and said notches for a nominal tool diameter of from 1/8 to 1 inch having a depth measured from the outer surface of said body of from 0.010 to 0.045 inch.
Claim 3
Dependent Claim
143 words
A rotary cutting tool comprising a generally cylindrical body of solid carbide material having a plurality of helical flutes in its outer periphery, each of said flutes having a plurality of substantially V-shaped notches therein, said notches on one of said flutes each being axially offset relative to a notch on the preceding flute a distance of fRom 0.010 to 0.020 inch, each of said notches having walls inclined at an angle of from 35* to 45* relative to the axis of said body, adjacent walls of adjacent notches of a given flute being spaced apart along the top edge of said given flute a distance of from 0.025 to 0.060 inch, and said notches for a nominal tool diameter of from 1/8 to 1 inch having a depth measured from the outer surface of said body of from 0.010 to 0.045 inch.
Claim 4
Dependent Claim
143 words
A rotary cutting tool comprising a generally cylindrical body of solid carbide material having a plurality of helical flutes in its outer periphery, each of said flutes having a plurality of substantially V-shaped notches therein, said notches on one of said flutes each being axially offset relative to a notch on the preceding flute a distance of fRom 0.010 to 0.020 inch, each of said notches having walls inclined at an angle of from 35* to 45* relative to the axis of said body, adjacent walls of adjacent notches of a given flute being spaced apart along the top edge of said given flute a distance of from 0.025 to 0.060 inch, and said notches for a nominal tool diameter of from 1/8 to 1 inch having a depth measured from the outer surface of said body of from 0.010 to 0.045 inch.
Claim 5
Dependent Claim
171 words
An end mill, comprising a cylindrical body of solid carbide having a plurality of helical flutes in the outer surface thereof, said helical flutes having a given hand relative to the axis of said body, each flute having a plurality of V-shaped notches therein defined by walls inclined approximately 40* relative to said axis and intersecting to define root lines for said notches, said root lines extending perpendicular to said axis of said body, the root line of each notch on one of said flutes being offset axially in the direction of said hand of said flutes approximately 0.015 inch from the root line of a notch on the preceding flute, adjacent walls of adjacent notches in each of said flutes being spaced apart along the top edge of said flutes a distance of from 0.025 to 0.060 inch, and said notches for a nominal tool diameter of from 1/8 to 1 inch having a depth measured from the outer surface of said body of from between 0.010 and 0.045 inch.
Claim 6
Dependent Claim
171 words
An end mill, comprising a cylindrical body of solid carbide having a plurality of helical flutes in the outer surface thereof, said helical flutes having a given hand relative to the axis of said body, each flute having a plurality of V-shaped notches therein defined by walls inclined approximately 40* relative to said axis and intersecting to define root lines for said notches, said root lines extending perpendicular to said axis of said body, the root line of each notch on one of said flutes being offset axially in the direction of said hand of said flutes approximately 0.015 inch from the root line of a notch on the preceding flute, adjacent walls of adjacent notches in each of said flutes being spaced apart along the top edge of said flutes a distance of from 0.025 to 0.060 inch, and said notches for a nominal tool diameter of from 1/8 to 1 inch having a depth measured from the outer surface of said body of from between 0.010 and 0.045 inch.
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |