US3798846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of grinding
Assignee: Individual
•
Filing: 1972-03-27
•
Granted: 1974-03-26
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Expires: 1992-03-27
Abstract
Abstract The invention provides for controlling the after grinding size of a work piece and the production rate while maintaining surface integrity and finish of the work piece substantially uniform. The method includes the step of controlling the surface velocity of a grinding element to maintain the specific grinding energy substantially constant.
Inventors
- 👤 R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:07
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
102 words
A method of grinding a work piece to maintain a substantially constant specific grinding energy, i.e., power consumption per unit volume, including the steps of: supporting the work piece on a grinding machine having a movable grinding element driven by a motor; moving the grinding element and work piece relative to each other and removing a substantially constant volume of material from the work piece per unit of time during the grinding operation; and selectively varying the surface velocity of the grinding element during the grinding operation to maintain a substantially constant power level; whereby the specific grinding energy is substantially constant.
Claim 2
Independent Claim
102 words
A method of grinding a work piece to maintain a substantially constant specific grinding energy, i.e., power consumption per unit volume, including the steps of: supporting the work piece on a grinding machine having a movable grinding element driven by a motor; moving the grinding element and work piece relative to each other and removing a substantially constant volume of material from the work piece per unit of time during the grinding operation; and selectively varying the surface velocity of the grinding element during the grinding operation to maintain a substantially constant power level; whereby the specific grinding energy is substantially constant.
Claim 3
Dependent Claim
44 words
A method as set forth in claim 1 wherein the grinding element has a known power to surface velocity curve; and the motor has a load-speed characteristic curve which is substantially the inverse of the power to surface velocity curve of the griNding element.
Claim 4
Dependent Claim
43 words
A method as set forth in claim 1 including the steps of: sensing the power utilized in the grinding operation; and adjusting the speed of the motor to vary the surface velocity of the grinding element and maintain the power level substantially constant.
Claim 5
Dependent Claim
51 words
A method as set forth in claim 1 including the steps of: during the grinding operation, sensing the after-grinding level of the work piece adjacent the grinding element; and adjusting the relative position of the work piece and grinding element to maintain the after-grinding level of the work piece substantially uniform.
Claim 6
Independent Claim
97 words
A method of grinding a work piece to maintain a substantially constant specific grinding energy, including the steps of: supporting the work piece on a grinding machine having a movable grinding element driven by a motor; moving the grinding element and work piece relative to each other while sensing the level of the work piece both before and after the grinding element to determine the volume of material being removed; and adjusting the speed of the motor to vary the surface velocity of the grinding element in a manner to maintain the specific grinding energy substantially constant.
Claim 7
Independent Claim
97 words
A method of grinding a work piece to maintain a substantially constant specific grinding energy, including the steps of: supporting the work piece on a grinding machine having a movable grinding element driven by a motor; moving the grinding element and work piece relative to each other while sensing the level of the work piece both before and after the grinding element to determine the volume of material being removed; and adjusting the speed of the motor to vary the surface velocity of the grinding element in a manner to maintain the specific grinding energy substantially constant.
Claim 8
Independent Claim
98 words
A method of grinding a work piece using a grinding element having a known power to surface velocity curve, including the steps of: supporting the work piece on a grinding machine; during the grinding operation sensing the after-grinding level of the work piece adjacent the grinding element; adjusting the relative position of the work piece and grinding element to maintain the after-grinding level of the work piece substantially constant; and driving the grinding element with a motor having a load-speed characteristic curve which is substantially the inverse of the power to surface velocity curve of the grinding element.
Claim 9
Independent Claim
98 words
A method of grinding a work piece using a grinding element having a known power to surface velocity curve, including the steps of: supporting the work piece on a grinding machine; during the grinding operation sensing the after-grinding level of the work piece adjacent the grinding element; adjusting the relative position of the work piece and grinding element to maintain the after-grinding level of the work piece substantially constant; and driving the grinding element with a motor having a load-speed characteristic curve which is substantially the inverse of the power to surface velocity curve of the grinding element.
Claim 10
Dependent Claim
59 words
A method as set forth in claim 6 including the step of: feeding the work piece relative to the grinding element at a rate commensurate with the type of material of the work piece and the grinding element being used, which has said known power to surface velocity curve, so that the motor operates near its maximum rated capacity.
Claim 11
Dependent Claim
29 words
A method as set forth in claim 7 wherein the motor drives the grinding element within the range of a preselected surface speed plus or minus about 1,000 sfpm.
Claim 12
Independent Claim
124 words
A method of grinding a work piece including the steps of: supporting the work piece on a grinding machine having a movable grinding element driven by a motor; sensing the after-grinding level of the work piece and adjusting the relative position of the work piece and grinding element to maintain the after-grinding level of the work piece substantially uniform; sensing the pre-grinding level of the work piece to determine any variations in the pre-grinding level outside of preselected limits; and monitoring the power consumed in the grinding operation and selectively adjusting the surface velocity of the grinding element to return the specific grinding energy to a preselected amount when there are changes in the power not attributable to said variations in the pre-grinding level.
Claim 13
Independent Claim
124 words
A method of grinding a work piece including the steps of: supporting the work piece on a grinding machine having a movable grinding element driven by a motor; sensing the after-grinding level of the work piece and adjusting the relative position of the work piece and grinding element to maintain the after-grinding level of the work piece substantially uniform; sensing the pre-grinding level of the work piece to determine any variations in the pre-grinding level outside of preselected limits; and monitoring the power consumed in the grinding operation and selectively adjusting the surface velocity of the grinding element to return the specific grinding energy to a preselected amount when there are changes in the power not attributable to said variations in the pre-grinding level.
Claim 14
Dependent Claim
45 words
A method as set forth in claim 9 including removing the material at a substantially constant rate except for said variations in the pregrinding level outside the preselected limits; and adjusting the speed of the motor to adjust the surface velocity of the grinding element.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |