EP0131366A2
Expired / Lapsed
EP
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Grinding machine with CNC pivotable workhead
Assignee: Ex-Cell-O Corp
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Filing: 1984-05-29
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Granted: —
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Expires: 2004-05-29
Abstract
Abstract A grinding machine is provided with a workhead support means having pivotable shaft means on which the support means is pivoted by a servomotor/pinion arrangement controlled by a programmable controller and a position indicating means on the pivotable shaft means that inputs angular shaft position signals to the controller. Adaptive control components may also be included in the control arrangement. The workhead support means is thereby pivotable to vary the angular relationship of the workpart axis to the grinding wheel axis to effect a desired taper or contour grind or to compensate for changes in grinding parameters causing out oftolerance ground workparts. Special releasable clamps are provided to fix a desired position of the workhead support means and yet release same for pivoting movement. Fluid lift mechanisms are also provided to reduce friction between the workhead support means and the adjacent machine base member during pivoting.
Inventors
- 👤 Victor F. Dzewaltowski
- 👤 Robert N. Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 22:21
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/02; B24B19/06; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/14; B24B5/00; B24B5/02; B24B5/14; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/416; G05B19/4163
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
58 words
A grinding machine having a workhead support means defining a workpart axis and which is pivotable under the control of means including position indicating means for determining the angular position of the workhead with respect to a reference position to vary the relative angular position of the workpart axis and the axis of rotation of a grinding wheel.
Claim 2
Dependent Claim
58 words
A grinding machine having a workhead support means defining a workpart axis and which is pivotable under the control of means including position indicating means for determining the angular position of the workhead with respect to a reference position to vary the relative angular position of the workpart axis and the axis of rotation of a grinding wheel.
Claim 3
Dependent Claim
194 words
A grinding machines having a wheelhead with a grinding wheel rotatable about an axis and a workhead with workpart fixturing means holding a workpart on another axis, the wheelhead and workhead being carried on machine member means and comprising (a) a workhead support means on which the workhead is carried, the support means including a pivotable means rotatbly mounted on the machine member means and on which the support means is pivoted relative to the wheelhead to vary the-angular relationship of the workpart axis relative to the grinding wheel axis, (b) means for pivoting the workhead support means and its pivotable means, and (c) control means for controlling the angular position of the workhead support means and workhead thereon, including position indicating means for determining the angular position of the workpart axis by determining angular movement of the pivotable means of the workhead support means with respect to a reference position and means for actuating the pivoting means to pivot the workhead support means on its pivotable means until the position indicating means indicates that a position is reached corresponding to a desired angular relationship of the workpart axis to the grinding wheel axis.
Claim 4
Dependent Claim
194 words
A grinding machines having a wheelhead with a grinding wheel rotatable about an axis and a workhead with workpart fixturing means holding a workpart on another axis, the wheelhead and workhead being carried on machine member means and comprising (a) a workhead support means on which the workhead is carried, the support means including a pivotable means rotatbly mounted on the machine member means and on which the support means is pivoted relative to the wheelhead to vary the-angular relationship of the workpart axis relative to the grinding wheel axis, (b) means for pivoting the workhead support means and its pivotable means, and (c) control means for controlling the angular position of the workhead support means and workhead thereon, including position indicating means for determining the angular position of the workpart axis by determining angular movement of the pivotable means of the workhead support means with respect to a reference position and means for actuating the pivoting means to pivot the workhead support means on its pivotable means until the position indicating means indicates that a position is reached corresponding to a desired angular relationship of the workpart axis to the grinding wheel axis.
Claim 5
Dependent Claim
64 words
A machine according to claim 2 wherein the control means further includes an electronic controller means and the pivoting means is under the control of the controller means to pivot the workhead support means on its pivotable means until the position indicating means indicates that a position is reached corresponding to a desired angular relationship of the workpart axis to the grinding wheel axis.
Claim 6
Dependent Claim
19 words
A machine according to any one of claims 1 to 3 wherein the control means is a programmable controller.
Claim 7
Dependent Claim
58 words
A machine according to claim 4 wherein the programmable controller is programmed to substantially continuously pivot the workhead support means until the position indicating means indicates that the support means has pivoted from a first to a second position corresponding to a programmed first relationship and programmed second relationship of the workpart axis to the grinding wheel axis.
Claim 8
Dependent Claim
86 words
A machine according to claim 2 wherein the control means further includes an adaptive control means having a gaging means for measuring a grinding parameter with respect to a reference parameter and wherein the means for actuating the pivoting means is responsive to the gaging means to pivot the workhead support means on to pivotable means until the position indicating means indicates that a position is reached corresponding to an angular relationship of the workpart axis to the grinding wheel axis providing the desired grinding parameter,
Claim 9
Dependent Claim
68 words
A machine according to any one of claims 1 to 6 which further includes releasable clamp means between the workhead support means and machine member means for clamping the workhead support means to the machine member means to maintain a desired position between the workpart axis and grinding wheel axis and releasable to allow pivoting of the workhead support means relative to the machine member to another position.
Claim 10
Dependent Claim
119 words
A machine according to claim 7 wherein the releasable clamp means includes a pivotably mounted lever means on the workhead support means, a fluid pressure piston means on the workhead support means to actuate the lever means, a clamping means actuated by the lever means and extending between the workhead support means and machine member means, and spring means biasing the clamping means to clamp the workhead support means and machine member means together when the lever means is not actuated by the piston means and means to fluid pressure actuate the piston means and cause the lever means to actuate the clamping means counter to the spring bias to unclamp the workhead support means and machine member means.
Claim 11
Dependent Claim
58 words
A machine according to any one of claims 1 to 8 which further includes means for providing fluid pressure between the workhead support means and machine member means for reducing friction therebetween during pivoting of the support means, allowing positioning of the workhead support means by the controlling means substantially within the resolution of the positioning indicating means.
Claim 12
Dependent Claim
42 words
A machine according to claim 8 wherein the fluid pressure providing means comprises channel means in the workhead support means facing the machine member means and a source of fluid pressure in communication with the channel means to provide fluid pressure therein.
Claim 13
Dependent Claim
17 words
A machine according to claim 9 wherein the fluid pressure source is a source of pressurised gas.
References Cited (Backward Citations)
No citation records indexed.
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