Patent US4643622A successfully refreshed from Google Patents.
US4643622A
Expired / Lapsed
US
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Automatic C-axis feedrate control for machine tools
Assignee: FEDERAL DEPOSIT INSURANCE Corp AS RECEIVER BY RECOLL MANAGEMENT CORP ITS ATTORNEY-IN-FACT
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Filing: 1985-03-25
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Granted: 1987-02-17
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Expires: 2005-03-25
Abstract
Abstract A machine tool is provided with a controller for computing, as a function of an established radius and a preset feedrate, a rotational speed for rotating the machine spindle to provide a uniform surface speed at the working edge of a tool as the tool alternates between linear movement along an X and/or Y axis and arcuate movement along the C-axis of the spindle. A method is provided for gauging straight surfaces and adjoining arcs at a constant feedrate without interruption.
Inventors
- 👤 Dennis A. Winski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:18
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/416; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896; Y10T409/30112
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
156 words
A method for gauging straight surfaces and adjoining arcs at a constant feedrate without interruption comprising the steps of: coupling a probe for rotation about an axis of a machine tool: offsetting said probe from said axis to establish a radius "r" from the axis to the tip of said probe; mounting a workpiece to be gauged to a work holding fixture; moving said work holding fixture at a preset feedrate "Fr(p)" along a straight path to effect gauging of a straight surface on said workpiece by said probe; computing, as a function of the established radius "r" and said preset feedrate "Fr(p)", a rotational speed for rotating said probe about said axis to provide a uniform surface speed at the tip of said probe as said probe traverses said workpiece from a straight surface to an arc being gauged; and rotating said probe about said axis at the computed rotational speed when gauging an arc.
Claim 2
Independent Claim
156 words
A method for gauging straight surfaces and adjoining arcs at a constant feedrate without interruption comprising the steps of: coupling a probe for rotation about an axis of a machine tool: offsetting said probe from said axis to establish a radius "r" from the axis to the tip of said probe; mounting a workpiece to be gauged to a work holding fixture; moving said work holding fixture at a preset feedrate "Fr(p)" along a straight path to effect gauging of a straight surface on said workpiece by said probe; computing, as a function of the established radius "r" and said preset feedrate "Fr(p)", a rotational speed for rotating said probe about said axis to provide a uniform surface speed at the tip of said probe as said probe traverses said workpiece from a straight surface to an arc being gauged; and rotating said probe about said axis at the computed rotational speed when gauging an arc.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said rotational speed "Fr(c)" is computed in accordance with the formula: ##EQU8##
Claim 4
Dependent Claim
27 words
The method of claim 1 comprising the further step of stopping the movement of said work holding fixture concurrently with the commencement of rotation of said probe.
Claim 5
Dependent Claim
27 words
The method of claim 1 comprising the further step of stopping the rotation of said probe concurrently with the commencement of movement of said work holding fixture.
Claim 6
Dependent Claim
27 words
The method of claim 4 comprising the further step of stopping the movement of said work holding fixture concurrently with the commencement of rotation of said probe.
Claim 7
Independent Claim
173 words
A method for guiding a tool along straight surfaces and adjoining arcs at a constant feedrate without interruption comprising the steps of: coupling a tool for rotation about an axis of a machine tool; offsetting said tool from said axis to establish a radius "r" from the axis to a working edge of said tool; mounting a workpiece to be processed adjacent the working edge of said tool; moving said tool and workpiece relative to each other at a preset feedrate "Fr(p)" along a straight path to effect processing of said workpiece by said tool; computing, as a function of the established radius "r" and said preset feedrate "Fr(p)", a rotational speed Fr(c) substantially according to the formula ##EQU9## for rotating said tool about said axis to provide a uniform surface speed at the working edge of said tool as said tool traverses said workpiece from a straight path to an arcuate path; and rotating said tool about the axis at the computed rotational speed to move the tool along the arcuate path.
Claim 8
Independent Claim
173 words
A method for guiding a tool along straight surfaces and adjoining arcs at a constant feedrate without interruption comprising the steps of: coupling a tool for rotation about an axis of a machine tool; offsetting said tool from said axis to establish a radius "r" from the axis to a working edge of said tool; mounting a workpiece to be processed adjacent the working edge of said tool; moving said tool and workpiece relative to each other at a preset feedrate "Fr(p)" along a straight path to effect processing of said workpiece by said tool; computing, as a function of the established radius "r" and said preset feedrate "Fr(p)", a rotational speed Fr(c) substantially according to the formula ##EQU9## for rotating said tool about said axis to provide a uniform surface speed at the working edge of said tool as said tool traverses said workpiece from a straight path to an arcuate path; and rotating said tool about the axis at the computed rotational speed to move the tool along the arcuate path.
Claim 9
Dependent Claim
155 words
A machine tool comprising: first and second generally perpendicular axes; a tool mounted for rotation about said first axis; means for offsetting the tool from said first axis to establish a radius "r" from the first axis to a working edge of said tool; means for providing relative linear movement between said tool and workpiece along said second axis at a preset feedrate "Fr(p)"; means for computing, as a function of the established radius "r" and said preset feedrate "Fr(p)", a rotational speed "Fr(c)" substantially in accordance with the formula ##EQU10## for rotation of said tool about said first axis to provide a uniform surface speed at the working edge of said tool as the relative movement between said tool and a workpiece progresses linearly along said second axis and arcuately about said first axis; and means for rotating said tool about said first axis to traverse an arc at said computed rotational speed "Fr(c)".
Claim 10
Dependent Claim
155 words
A machine tool comprising: first and second generally perpendicular axes; a tool mounted for rotation about said first axis; means for offsetting the tool from said first axis to establish a radius "r" from the first axis to a working edge of said tool; means for providing relative linear movement between said tool and workpiece along said second axis at a preset feedrate "Fr(p)"; means for computing, as a function of the established radius "r" and said preset feedrate "Fr(p)", a rotational speed "Fr(c)" substantially in accordance with the formula ##EQU10## for rotation of said tool about said first axis to provide a uniform surface speed at the working edge of said tool as the relative movement between said tool and a workpiece progresses linearly along said second axis and arcuately about said first axis; and means for rotating said tool about said first axis to traverse an arc at said computed rotational speed "Fr(c)".
Claim 11
Dependent Claim
13 words
The machine tool of claim 7 wherein said tool is a measuring probe.
Claim 12
Dependent Claim
26 words
The machine tool of claim 7 wherein said first axis is the C-axis and the second axis comprises the X/or Y axis of the machine tool.
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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) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |