US4756126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling the machining of mechanical pieces
Assignee: Marposs SpA
•
Filing: 1986-12-08
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Granted: 1988-07-12
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Expires: 2006-12-08
Abstract
Abstract The machining of mechanical pieces in a grinding machine is controlled depending on in-process and post-process measurements of the pieces. The post-process measurement is carried out by using the same in-process measurement means, with the provision of different zero references for the two types of measurements.
Inventors
- 👤 Mario Pozzetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:55
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/013; B23Q15/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A method for controlling the machining of mechanical pieces in a machine tool, like a grinding machine, comprising the steps of in-process measuring the pieces by measurement means in order to obtain a first measurement signal; a first comparing step, for comparing the first measurement signal with a first reference; controlling the machine tool depending on the result of the first comparing step; post-process measuring the pieces by the same measurement means used for in-process measuring, in order to obtain a second measurement signal; a second comparing step for comparing the second measurement signal with a second reference; and correcting the first reference depending on said second comparing step.
Claim 2
Independent Claim
109 words
A method for controlling the machining of mechanical pieces in a machine tool, like a grinding machine, comprising the steps of in-process measuring the pieces by measurement means in order to obtain a first measurement signal; a first comparing step, for comparing the first measurement signal with a first reference; controlling the machine tool depending on the result of the first comparing step; post-process measuring the pieces by the same measurement means used for in-process measuring, in order to obtain a second measurement signal; a second comparing step for comparing the second measurement signal with a second reference; and correcting the first reference depending on said second comparing step.
Claim 3
Dependent Claim
42 words
The method according to claim 1, further comprising the steps of measuring a master piece by means of said measurement means in order to obtain a third measurement signal, and correcting said first and second references depending on the third measurement signal.
Claim 4
Dependent Claim
25 words
The method according to claim 2, wherein said master piece is arranged in the machine and the first and the second references are automatically corrected.
Claim 5
Dependent Claim
22 words
The method according to claim 1, wherein the post-process measuring of the pieces occurs when the piece is in the working position.
Claim 6
Dependent Claim
32 words
The method according to claim 4, for controlling a grinding machine including a grinding wheel, further comprising the step of withdrawing the grinding wheel before the step of post-process measuring the pieces.
Claim 7
Dependent Claim
34 words
The method according to claim 5, wherein a coolant jet is directed against the pieces during grinding, further comprising the step of interrupting the coolant jet before the step of post-process measuring the pieces.
Claim 8
Dependent Claim
22 words
The method according to claim 1, wherein the post-process measuring of the pieces occurs by placing the piece near the machining position.
Claim 9
Dependent Claim
22 words
The method according to claim 7, wherein during the measuring of a machined piece, another piece is loaded in the machining position.
References Cited (Backward Citations)
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US3057186A
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US3877151A
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GB2060176A
Cited
US4455789A
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US4539777A
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US4651472A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |