Patent US6159835A successfully refreshed from Google Patents.
Patent US2982288A successfully refreshed from Google Patents.
Patent US4063906A successfully refreshed from Google Patents.
US4063906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for grinding elongated cylindrical workpieces which are advanced during the grinding operation while being rotated about the longitudinal axis thereof
Assignee: Schumag Schumacher Metallwerke AG
•
Filing: 1976-08-11
•
Granted: 1977-12-20
•
Expires: 1996-08-11
Abstract
Abstract Method of grinding elongated, cylindrical workpieces in continuous operat in a grinding machine wherein the workpieces are advanced while they are rotated about their longitudinal axes includes exerting an oscillating grinding pressure transversely to the longitudinal axis of the workpiece, and adjusting the frequency of the oscillations to lie substantially in low-to-medium frequency range, outside the frequency ranges of resonant vibrations of parts of the workpiece and of the grinding machine; and device for carrying out the foregoing method.
Inventors
- 👤 Walter Wetzels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:40
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/18
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
73 words
Method of grinding elongated, cylindrical workpieces in continuous operation in a grinding machine wherein the workpieces are advanced while they are rotated about the longitudinal axes thereof, which comprises exerting a pulsating grinding pressure transversely to the longitudinal axis of the workpiece and adjusting the frequency of the pulsations to lie substantially in low-to-medium frequency range outside the frequency ranges of resonant vibrations of parts of the workpiece and of the grinding machine.
Claim 2
Dependent Claim
73 words
Method of grinding elongated, cylindrical workpieces in continuous operation in a grinding machine wherein the workpieces are advanced while they are rotated about the longitudinal axes thereof, which comprises exerting a pulsating grinding pressure transversely to the longitudinal axis of the workpiece and adjusting the frequency of the pulsations to lie substantially in low-to-medium frequency range outside the frequency ranges of resonant vibrations of parts of the workpiece and of the grinding machine.
Claim 3
Dependent Claim
17 words
Method according to claim 1 which comprises pulsating an hydraulic medium to exert said pulsating grinding pressure.
Claim 4
Dependent Claim
25 words
Method according to claim 1, wherein the pulsating grinding pressure is made up of a constant prestressing grinding pressure, and a simultaneous pulsating grinding pressure.
Claim 5
Dependent Claim
23 words
Method according to claim 3, wherein the pulsating grinding pressure has an amplitude that is smaller than the magnitude of the prestressing pressure.
Claim 6
Dependent Claim
23 words
Method according to claim 3, wherein the amplitude of the pulsating grinding pressure is substantially one-third of the magnitude of the prestressing pressure.
Claim 7
Dependent Claim
27 words
Method according to claim 3, wherein the amplitude of the pulsating grinding pressure is greater than the amplitude of the resonant vibration pressure exerted on the workpiece.
Claim 8
Dependent Claim
29 words
Method according to claim 6, wherein the amplitude of the pulsating grinding pressure is substantially 2 to 15 times as great as the amplitude of the resonant vibration pressure.
Claim 9
Dependent Claim
27 words
Method according to claim 6, wherein the amplitude of the pulsating grinding pressure is substantially 10 times as great as the amplitude of the resonant vibration pressure.
Claim 10
Dependent Claim
22 words
Method according to claim 1, wherein the pulsating frequency of the pulsating grinding pressure is between substantially 100 and substantially 500 Hz.
Claim 11
Dependent Claim
73 words
Method according to claim 1, wherein the pulsating frequency of the pulsating grinding pressure is adjusted with respect to the frequency of rotation of the workpiece, corresponding to the speed of rotation of the workpiece, and with respect to the frequency of rotation of the grinding wheel, corresponding to the speed of rotation of the grinding wheel, to an adjusted value that is other than an integral ratio and an inverse integral ratio.
Claim 12
Dependent Claim
32 words
Method according to claim 1, wherein the pulsating frequency of the pulsating grinding pressure is greater than the frequency of rotation of the workpiece which corresponds to rotary speed of the workpiece.
Claim 13
Dependent Claim
17 words
Method according to claim 1, wherein the pulsating grinding pressure has a waveform that is substantially sinusoidal.
Claim 14
Dependent Claim
28 words
Method according to claim 1, wherein the pulsating grinding pressure has a waveform other than sinusoidal and having harmonics that are outside the ranges of the resonant vibrations.
Claim 15
Dependent Claim
26 words
Method according to claim 2, wherein the hydraulic medium is pulsated to exert simultaneously at least two pulsating grinding pressures of different frequency on the workpiece.
Claim 16
Dependent Claim
28 words
Method according to claim 1, wherein the magnitude of the prestressing pressure and the frequency and amplitude of the pulsating grinding pressure are adjustable independently of one another.
Claim 17
Dependent Claim
32 words
Method according to claim 2, wherein the pulsating of the hydraulic medium exerts the pulsating grinding pressure at two locations substantially radially opposite one another on the cylindrical periphery of the workpiece.
References Cited (Backward Citations)
US2127210A
Cited
DE805988C
Cited
DE1001916B
Cited
US3079741A
Cited
US3423887A
Cited
US4004375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |