US4210039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming non-circular workpieces
Assignee: Willemin Machines SA
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Filing: 1978-10-10
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Granted: 1980-07-01
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Expires: 1998-10-10
Abstract
Abstract An apparatus for forming non-circular workpieces including a rotatable workpiece carrying element which is laterally displaceable as it rotates to form the desired non-circular workpiece profile. The workpiece carrying element has three cam surfaces at least two of which have a non-circular profile, each bearing against fixed roller bearings to guide the workpiece against a fixed cutting surface to form the desired workpiece profile. The apparatus also is utilized to form at least the two non-circular profile cam surfaces.
Inventors
- 👤 Paul Willemin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:05
CPC Classifications
B; B24; B24B; B24B17/00; B24B17/02; B24B17/025; B24B17/026; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/40; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/10; B23Q35/101; B23Q35/102; B23Q35/103; Y; Y10; Y10T; Y10T82/00; Y10T82/13
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
An apparatus for forming a non-circular workpiece surface comprising: a workpiece; workpiece cutting means; a rotatable workpiece carrying element, said workpiece mounted on said carrying element, and said carrying element and workpiece being laterally displaceable as said carrying element rotates; said workpiece carrying element including at least a first cam surface thereon bearing against a fixed roller bearing as said carrying element rotates; said carrying element further including shaping cam means; and biasing means for biasing said shaping cam means against a fixed point as said carrying element rotates to guide said workpiece against said cutting means and laterally shift said workpiece and carrying element as they rotate to form a non-circular surface on said workpiece.
Claim 2
Independent Claim
116 words
An apparatus for forming a non-circular workpiece surface comprising: a workpiece; workpiece cutting means; a rotatable workpiece carrying element, said workpiece mounted on said carrying element, and said carrying element and workpiece being laterally displaceable as said carrying element rotates; said workpiece carrying element including at least a first cam surface thereon bearing against a fixed roller bearing as said carrying element rotates; said carrying element further including shaping cam means; and biasing means for biasing said shaping cam means against a fixed point as said carrying element rotates to guide said workpiece against said cutting means and laterally shift said workpiece and carrying element as they rotate to form a non-circular surface on said workpiece.
Claim 3
Dependent Claim
103 words
The forming apparatus as claimed in claim 1 wherein: said shaping cam means includes a shaping cam mounted on said carrying element spaced from said first cam surface, said shaping cam including a profiled cam surface to guide the lateral displacement of said carrying element and workpiece as they rotate; said biasing means including a complementary cam mounted on said carrying element, said complementary cam including a second profiled cam surface bearing against a second fixed roller bearing; and said fixed point against which said shaping cam profiled surface is biased against being formed by the surface of a third fixed roller bearing.
Claim 4
Dependent Claim
138 words
The forming apparatus as claimed in claim 1 including: said workpiece carrying element angularly fixed to a rotatably driven quill; said first cam surface being formed on the periphery of a flange formed on said workpiece carrying element adjacent said quill, and said carrying element including a sleeve extending axially from said flange away from said quill, said workpiece being mounted on said sleeve; said flange being fixed to said quill by a ring surrounding said sleeve and bearing against said flange by stay rods fixed to said ring and quill through said flange; and said ring being spaced from said flange by bearing means, said rods passing through openings larger than said rods to allow said workpiece carrying element to be radially displaced with respect to said quill as said quill and workpiece carrying element are rotated.
Claim 5
Independent Claim
239 words
A method of forming a cam profile on an apparatus for forming non-circular workpiece surfaces, said apparatus including a rotatable workpiece carrying element adapted to carry a workpiece having a surface to be worked upon against a cutting tool position, said carrying element being laterally displaced in a predetermined fashion as it rotates to form a non-circular profile on said workpiece, said carrying element including a first circular cam surface formed on a flange of said carrying element and a second shaping cam mounted on a sleeve of said carrying element having a non-circular profile, and means for biasing said cams against respective fixed roller bearings as said carrying element rotates to guide said lateral displacement of said carrying element, said method comprising: mounting a rough or unfinished cam member in place of said shaping cam on said sleeve; replacing said shaping cam roller bearing with cutting means having a cutting position corresponding to the contact position between said shaping cam and its roller bearing; mounting template means on said carrying element in place of said workpiece, said template means having an outer surface corresponding to the inner surface profile of the desired non-circular surface to be formed; mounting template follower means in said cutting tool position to bear against said template means outer surface; and rotating said carrying element until said template means is in continuous contact with said template follower means to finish said shaping cam surface.
Claim 6
Independent Claim
239 words
A method of forming a cam profile on an apparatus for forming non-circular workpiece surfaces, said apparatus including a rotatable workpiece carrying element adapted to carry a workpiece having a surface to be worked upon against a cutting tool position, said carrying element being laterally displaced in a predetermined fashion as it rotates to form a non-circular profile on said workpiece, said carrying element including a first circular cam surface formed on a flange of said carrying element and a second shaping cam mounted on a sleeve of said carrying element having a non-circular profile, and means for biasing said cams against respective fixed roller bearings as said carrying element rotates to guide said lateral displacement of said carrying element, said method comprising: mounting a rough or unfinished cam member in place of said shaping cam on said sleeve; replacing said shaping cam roller bearing with cutting means having a cutting position corresponding to the contact position between said shaping cam and its roller bearing; mounting template means on said carrying element in place of said workpiece, said template means having an outer surface corresponding to the inner surface profile of the desired non-circular surface to be formed; mounting template follower means in said cutting tool position to bear against said template means outer surface; and rotating said carrying element until said template means is in continuous contact with said template follower means to finish said shaping cam surface.
Claim 7
Dependent Claim
133 words
The method of forming as claimed in claim 4, wherein said biasing means include a third complementary cam mounted on said sleeve and bearing against a third fixed roller bearing to maintain said circular can and said shaping cam in contact with their respective roller bearings as said workpiece carrying element rotates, further including forming said complementary cam including: mounting a rough or unfinished cam member in place of said complementary cam on said sleeve; replacing said third roller bearing with biased cutting means bearing against said unfinished cam and having a stop cutting position corresponding to the contact position between said complementary cam and its roller; disabling said template and template follower means; and rotating said carrying element until said cutting means reaches said stop cutting position to finish said complementary cam.
References Cited (Backward Citations)
US2762250A
Cited
US3066560A
Cited
US2836936A
Cited
US3375613A
Cited
US3595108A
Cited
US3800621A
Cited
US3861275A
Cited
US3978766A
Cited
US4052928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-01 | 1983-12-31 | 1984-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-01 | 1987-12-31 | 1988-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-01 | 1991-12-31 | 1992-07-01 | $7700.00 | Window Closed / Lapsed |