US3886693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine for machining polygonal workpieces
Assignee: Nehezipari Muszaki Egyetem
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Filing: 1974-04-09
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Granted: 1975-06-03
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Expires: 1994-04-09
Abstract
Abstract The invention concerns a grinding machine whereby diverse polygonal workpieces may be ground in a manner similar to conventional roll grinding and internal grinding. In the machine according to the invention the workpiece to be ground is rotated about its axis, a grinding tool is rotated about its own axis which is parallel with the workpiece axis and which is stationary or alternatingly rotating, and at the same time the axis of the workpiece is rotated around the periphery of a cylinder of rotation - whose axis is parallel with the workpiece axis - at an r.p.m. practically equal to the r.p.m. of the workpiece about its own axis multiplied by the number of sides of the polygon and the ratio of the angular velocities of the first two above-mentioned rotations is periodically changed.
Inventors
- 👤 Jozsef Tajnafoi
- 👤 Karoly Gellert
- 👤 Karoly Hidasi
- 👤 Gribovszki
- 👤 Sandor Vekony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:31
CPC Classifications
F; F16; F16H; F16H35/00; B; B23; B23Q; B23Q27/00; B23Q27/006; B24; B24B; B24B19/00; B24B19/08; B24B5/00; B24B5/02; B24B5/14; Y; Y10; Y10S; Y10S451/00; Y10S451/919
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
A grinding machine comprising a grinding tool, means for rotating said grinding tool about a fixed axis, means for rotating a polygonal workpiece about its own axis in contact with said driving tool, means for rotating said axis of said workpiece about an eccentric axis at a speed of rotation equal to the speed of rotation of said workpiece about its own axis multiplied by the number of sides of said polygonal workpiece, and a correcting mechanism for changing the angular velocity of rotation of the workpiece about said eccentric axis in those sections of that motion which are associated with the grinding of the sides of the polygon while maintaining constant the speeds of rotation of said grinding tool about said fixed axis and of said worKpiece about its own axis.
Claim 2
Dependent Claim
132 words
A grinding machine comprising a grinding tool, means for rotating said grinding tool about a fixed axis, means for rotating a polygonal workpiece about its own axis in contact with said driving tool, means for rotating said axis of said workpiece about an eccentric axis at a speed of rotation equal to the speed of rotation of said workpiece about its own axis multiplied by the number of sides of said polygonal workpiece, and a correcting mechanism for changing the angular velocity of rotation of the workpiece about said eccentric axis in those sections of that motion which are associated with the grinding of the sides of the polygon while maintaining constant the speeds of rotation of said grinding tool about said fixed axis and of said worKpiece about its own axis.
Claim 3
Dependent Claim
132 words
A grinding machine comprising a grinding tool, means for rotating said grinding tool about a fixed axis, means for rotating a polygonal workpiece about its own axis in contact with said driving tool, means for rotating said axis of said workpiece about an eccentric axis at a speed of rotation equal to the speed of rotation of said workpiece about its own axis multiplied by the number of sides of said polygonal workpiece, and a correcting mechanism for changing the angular velocity of rotation of the workpiece about said eccentric axis in those sections of that motion which are associated with the grinding of the sides of the polygon while maintaining constant the speeds of rotation of said grinding tool about said fixed axis and of said worKpiece about its own axis.
Claim 4
Dependent Claim
132 words
A grinding machine comprising a grinding tool, means for rotating said grinding tool about a fixed axis, means for rotating a polygonal workpiece about its own axis in contact with said driving tool, means for rotating said axis of said workpiece about an eccentric axis at a speed of rotation equal to the speed of rotation of said workpiece about its own axis multiplied by the number of sides of said polygonal workpiece, and a correcting mechanism for changing the angular velocity of rotation of the workpiece about said eccentric axis in those sections of that motion which are associated with the grinding of the sides of the polygon while maintaining constant the speeds of rotation of said grinding tool about said fixed axis and of said worKpiece about its own axis.
Claim 5
Dependent Claim
225 words
A grinding machine comprising a grinding tool, means for rotating said grinding tool about a fixed axis, means for rotating a polygonal workpiece about its own axis in contact with said grinding tool, a driven first tubular shaft surrounding and coaxial with a second shaft that rotates said axis of said workpiece about an eccentric axis at a speed of rotation equal to the speed of rotation of said workpiece about its own axis multiplied by the number of sides of said polygonal workpiece, and a correcting mechanism for changing the angular velocity of rotation of the workpiece about said eccentric axis in those sections of that motion which are associated with the grinding of the sides of the polygon, said correcting mechanism comprising a nonrotatable radially deformable ring concentric with said first and second shafts, means for selectively effecting the radial deformation of the ring, an arm carried by said first shaft for rocking about an axis parallel to but spaced from the common axis of said first and second shafts, said arm being biassed against said deformable ring thereby to rock the arm according to the deformation of the ring upon rotation of said first shaft, and means to transmit the rotary and rocking movement of said arm to said second shaft thereby to rotate said second shaft at a variable angular velocity.
Claim 6
Dependent Claim
225 words
A grinding machine comprising a grinding tool, means for rotating said grinding tool about a fixed axis, means for rotating a polygonal workpiece about its own axis in contact with said grinding tool, a driven first tubular shaft surrounding and coaxial with a second shaft that rotates said axis of said workpiece about an eccentric axis at a speed of rotation equal to the speed of rotation of said workpiece about its own axis multiplied by the number of sides of said polygonal workpiece, and a correcting mechanism for changing the angular velocity of rotation of the workpiece about said eccentric axis in those sections of that motion which are associated with the grinding of the sides of the polygon, said correcting mechanism comprising a nonrotatable radially deformable ring concentric with said first and second shafts, means for selectively effecting the radial deformation of the ring, an arm carried by said first shaft for rocking about an axis parallel to but spaced from the common axis of said first and second shafts, said arm being biassed against said deformable ring thereby to rock the arm according to the deformation of the ring upon rotation of said first shaft, and means to transmit the rotary and rocking movement of said arm to said second shaft thereby to rotate said second shaft at a variable angular velocity.
Claim 7
Dependent Claim
44 words
A grinding machine as claimed in claim 2, said means for radially deforming the ring comprising shoes that bear against the deformable ring, and a rigid ring in which said shoes are screw-threadedly adjustable in radial directions to adjust the deformation of the ring.
Claim 8
Dependent Claim
20 words
A grinding machine as claimed in claim 2, and spring means urging said arm into contact with said deformable ring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |