Patent US3660950A successfully refreshed from Google Patents.
US3660950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the actual stock removal in surface belt grinding
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1970-04-06
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Granted: 1972-05-09
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Expires: 1990-04-06
Abstract
Abstract A method of controlling the actual stock removal in a method of belt grinding wherein the infeed and elasticity of a contact roll serve to increase the contact pressure of the abrasive belt, so as to obtain the required amount of stock removal irrespective of deterioration in the grinding performance of the belt due to repeated use and of the thickness of the workpiece.
Inventors
- 👤 Hidehiko Takeyama
- 👤 Kaneyoshi Miyasaka
- 👤 Shinichi Miyazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:59
CPC Classifications
B; B24; B24B; B24B21/00; B24B21/04; B24B21/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
In surface belt grinding wherein the grinding pressure is exerted by means of the displacement and the elasticity of a contact roll, the method for controlling the stock removal by grinding so as to grind a required definite stock or depth from the surface of the workpiece comprising, carrying out in-process measurement of the thickness of each workpiece before and after grinding processing, computing the amount of stock removal, calculating Beta i for a next workpiece by utilizing the data and the function form obtained by said before and after inprocess measurement and including the computed amount of stock removal, where Beta i is the depth of cut ratio, and controlling the degree of displacement for the ith workpiece Di of the contact roll from its zero position so as to conform with the equation Di (Ho/ Beta i)- Ei, wherein Ei is the error in the thickness of the ith workpiece before processing, Ho is the depth of stock removal required in reference to the standard value specified on the drawings.
Claim 2
Dependent Claim
172 words
In surface belt grinding wherein the grinding pressure is exerted by means of the displacement and the elasticity of a contact roll, the method for controlling the stock removal by grinding so as to grind a required definite stock or depth from the surface of the workpiece comprising, carrying out in-process measurement of the thickness of each workpiece before and after grinding processing, computing the amount of stock removal, calculating Beta i for a next workpiece by utilizing the data and the function form obtained by said before and after inprocess measurement and including the computed amount of stock removal, where Beta i is the depth of cut ratio, and controlling the degree of displacement for the ith workpiece Di of the contact roll from its zero position so as to conform with the equation Di (Ho/ Beta i)- Ei, wherein Ei is the error in the thickness of the ith workpiece before processing, Ho is the depth of stock removal required in reference to the standard value specified on the drawings.
Claim 3
Dependent Claim
164 words
In surface belt grinding wherein the grinding pressure is exerted by means of the displacement and the elasticity of a contact roll, the method for controlling the stock removal by grinding so as to grind a series of workpieces into a definite required thickness within a small tolerance comprising, carrying out in-process measurement of the thickness of each workpiece before and after grinding processing, computing the amount of stock removal calculating Beta i by utilizing the data and the function form obtained by said before and after in-process measurement and including the computed amount of stock removal, where Beta i is the depth of cut ratio, and controlling the degree of displacement for the ith workpiece Di of the contact roll from its zero position so as to conform with the equation wherein Ei is the error in the thickness of the ith workpiece before processing, Ho is the depth of stock removal required in reference to the standard value specified on the drawings.
Claim 4
Dependent Claim
164 words
In surface belt grinding wherein the grinding pressure is exerted by means of the displacement and the elasticity of a contact roll, the method for controlling the stock removal by grinding so as to grind a series of workpieces into a definite required thickness within a small tolerance comprising, carrying out in-process measurement of the thickness of each workpiece before and after grinding processing, computing the amount of stock removal calculating Beta i by utilizing the data and the function form obtained by said before and after in-process measurement and including the computed amount of stock removal, where Beta i is the depth of cut ratio, and controlling the degree of displacement for the ith workpiece Di of the contact roll from its zero position so as to conform with the equation wherein Ei is the error in the thickness of the ith workpiece before processing, Ho is the depth of stock removal required in reference to the standard value specified on the drawings.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |