Patent US5246575A successfully refreshed from Google Patents.
US4548531A
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US
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Method for chamfering the edges of gear teeth
Assignee: RTX Corp
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Filing: 1983-05-03
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Granted: 1985-10-22
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Expires: 2003-05-03
Abstract
Abstract The ends of gear teeth are chamfered using an arcuate motion cutter having a complex cross sectional shape. In an improvement of the prior trial and error techniques, the cutter shape is made correctly the first time using an algorithm which includes determining certain s-dimensions produced on a chamfer by a set of tool dimensions; comparing these to the desired maximum, minimum and nominal chamfer widths, and; then iteratively optimizing the set of tool dimensions to minimize the differences.
Inventors
- 👤 Leon H. Seitelman
- 👤 Edward J. Kaveckas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:06
CPC Classifications
B; B23; B23F; B23F19/00; B23F19/10; B23F21/00; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101113; Y10T409/101272
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
230 words
The method of producing on the edges of the teeth of a gear a chamfer having desired maximum and minimum edge-to-edge width dimensions along its length, where the edge of each gear tooth is formed by the intersection of a tooth side generally lying in an x-y plane and a tooth flank generally running perpendicular thereto in a z axis direction, while using a cutting tool which has circular motion about an axis perpendicular to the y-z plane, which comprises selecting a first tool profile and determining s-dimensions at a multiplicity of points along the length of the chamfer which would be produced by the first tool profile, where the s-dimensions are the distances across the chamfer from an edge thereof to the nearest point on the opposing edge thereof; comparing the s-dimensions to the chamfer width desired at each of the said multiplicity of points; iteratively selecting further tool profiles each of which is different from the prior tool profile, and determining for each the s-dimensions at a multiplicity of points along the length of the chamfer which would be produced and comparing them to the chamfer widths desired, until a final tool profile is determined, which profile provides s-dimensions falling within the range of the desired minimum and maximum chamfer widths; making a tool having substantially said final profile, and; chamfering the teeth with the tool so made.
Claim 2
Independent Claim
230 words
The method of producing on the edges of the teeth of a gear a chamfer having desired maximum and minimum edge-to-edge width dimensions along its length, where the edge of each gear tooth is formed by the intersection of a tooth side generally lying in an x-y plane and a tooth flank generally running perpendicular thereto in a z axis direction, while using a cutting tool which has circular motion about an axis perpendicular to the y-z plane, which comprises selecting a first tool profile and determining s-dimensions at a multiplicity of points along the length of the chamfer which would be produced by the first tool profile, where the s-dimensions are the distances across the chamfer from an edge thereof to the nearest point on the opposing edge thereof; comparing the s-dimensions to the chamfer width desired at each of the said multiplicity of points; iteratively selecting further tool profiles each of which is different from the prior tool profile, and determining for each the s-dimensions at a multiplicity of points along the length of the chamfer which would be produced and comparing them to the chamfer widths desired, until a final tool profile is determined, which profile provides s-dimensions falling within the range of the desired minimum and maximum chamfer widths; making a tool having substantially said final profile, and; chamfering the teeth with the tool so made.
Claim 3
Dependent Claim
74 words
The method of claim 1 which further comprises determining a pair of s-dimensions at each of the multiplicity of points, which pair comprises a first s-dimension referenced from a point on the tooth flank edge of the chamfer and a second s-dimension referenced from a point on the tooth side edge of the chamfer, the pair of chamfer edge reference points lying along the circular cutting path of a point on the tool profile.
Claim 4
Dependent Claim
36 words
The method of claim 1 which further comprises selecting as the first tool profile that profile which characterizes a tool shaped to contact the edges of the teeth while producing a chamfer of essentially zero width.
Claim 5
Dependent Claim
27 words
The method of claim 1 which further comprises minimizing the differences between the s-dimensions and the average chamfer width at the points where the s-dimensions are determined.
Claim 6
Dependent Claim
17 words
A tool having a profile made according to the method of claims 1, 2, 3 or 4.
References Cited (Backward Citations)
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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) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |