US3762041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for manufacturing slotted core structures
Assignee: General Electric Co
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Filing: 1971-11-10
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Granted: 1973-10-02
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Expires: 1991-11-10
Abstract
Abstract Methods and apparatus for shaping restricted entrances of passageways in laminated magnetic cores and cores with preselected shaped surfaces. Apparatus includes core centering means, spline or rib means for orienting or aligning a slotted core and for gauging core slot entrances. Core slot entrance shaping means in the form of one or more tools is supported for radial movement relative to a core. Tools may be operated by hydraulic means to form lands along the entrance surfaces of wire admitting passageways of cores comprised of a plurality of juxtaposed laminations, at least some of which are at least slightly staggered or misaligned relative to one another. A preferred method includes gauging restricted slot entrances of a laminated core; relatively orienting slot entrances and shaping means; conforming the slot entrances to a preselected configuration; and separating the core and shaping means.
Inventors
- 👤 E Bair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:10
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/02; H02K15/021; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/4902; Y10T29/49075; Y10T29/49078
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
A method of forming a stator for use in a cynamoelectric machine having a core fabricated from a number of laminations each comprising a plurality of spaced apart teeth having first portions that establish coil accommodating regions in the form of slots and having second portions that establish restricted passageways in communication with the slots, the method comprising the steps: assembling a laminated magnetic core by securing a plurality of laminations together in stacked relationship with the second portions of the teeth of adjacent laminations in at least general alignment relative to one another, and forming pairs of core slot entry walls for restricted passageway core slots with associated ones of a pair of core slot entry walls bounding a restricted slot entrance along the core; and shaping at least some of the core slot entry walls to form relatively smooth lands along at least a portion of said at least some core slot entry walls to conform restricted core slot entrances to a predetermined configuration.
Claim 2
Independent Claim
166 words
A method of forming a stator for use in a cynamoelectric machine having a core fabricated from a number of laminations each comprising a plurality of spaced apart teeth having first portions that establish coil accommodating regions in the form of slots and having second portions that establish restricted passageways in communication with the slots, the method comprising the steps: assembling a laminated magnetic core by securing a plurality of laminations together in stacked relationship with the second portions of the teeth of adjacent laminations in at least general alignment relative to one another, and forming pairs of core slot entry walls for restricted passageway core slots with associated ones of a pair of core slot entry walls bounding a restricted slot entrance along the core; and shaping at least some of the core slot entry walls to form relatively smooth lands along at least a portion of said at least some core slot entry walls to conform restricted core slot entrances to a predetermined configuration.
Claim 3
Dependent Claim
57 words
The method of claim 1 further including the step of gauging at least some of the restricted slot entrances along the core prior to shaping that at least some of the core slot entry walls; and wherein forming lands includes conforming core slot entry walls to the configuration of at least one core slot entrance shaping tool.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein shaping at least some of the core slot entry walls includes increasing the effective width of restricted core slot entrances along the core.
Claim 5
Independent Claim
116 words
A method of manufacturing a core from juxtaposed layers of magnetic material, the core comprising teeth having first portions that establish slots defined by coil accommodating surfaces, and tip portions that establish surfaces of restricted passageways that communicate with the slots, each of the core teeth comprising a plurality of generally aligned teeth previously formed in the layers of magnetic material, the method comprising the steps: securing together the layers of magnetic material to form a slotted magnetic core; and shaping preselected regions of the tip portions of at least some of the core teeth along the entrances of restricted passageways along the core and associated therewith to conform the restricted passageways to a predetermined configuration.
Claim 6
Independent Claim
116 words
A method of manufacturing a core from juxtaposed layers of magnetic material, the core comprising teeth having first portions that establish slots defined by coil accommodating surfaces, and tip portions that establish surfaces of restricted passageways that communicate with the slots, each of the core teeth comprising a plurality of generally aligned teeth previously formed in the layers of magnetic material, the method comprising the steps: securing together the layers of magnetic material to form a slotted magnetic core; and shaping preselected regions of the tip portions of at least some of the core teeth along the entrances of restricted passageways along the core and associated therewith to conform the restricted passageways to a predetermined configuration.
Claim 7
Dependent Claim
77 words
The method of claim 4 wherein the tip por-tions of the core teeth terminate along a peripheral core surface and the restricted passageway surfaces established by the tip portions of the core teeth terminate and establish a corner along the peripheral core surface; and wherein shaping preselected regIons of the tip portions of at least some of the core teeth includes working the corners established by the at least some of the core teeth and forming lands.
Claim 8
Dependent Claim
40 words
The method of claim 5 wherein working the corners includes mechanically deforming selected portions of at least some of the layers of magnetic material in the core along the juncture of the peripheral core surface and restricted passageway core surfaces.
Claim 9
Independent Claim
192 words
A method of manufacturing a slotted laminated magnetic core and conforming selected portions of restricted slot entrance surfaces of the magnetic core to a predetermined configuration, pairs of the entrance surfaces each defining a restricted core passageway that communicates with a coil accommodating slot in the core, the method comprising the steps: forming a laminated slotted magnetic core having slots therein by stacking together a plurality of slotted laminations; orienting the slotted magnetic core so formed relative to an apparatus having at least one tool having selected surface regions corresonding to the predetermined configuration and positioning the selected surfaces of the tool and selected portions of at least some of the restricted slot entrance surfaces of the magnetic core adjacent to one another; urging the selected surface regions of the at least one tool and the selected portions of the surfaces of the magnetic core into force transmitting contact with one another and forcing the selected portions of the at least some of the restricted slot entrance surfaces of the magnetic core to conform to the selected surface regions of the tool; and separating the at least one tool and the core.
Claim 10
Independent Claim
192 words
A method of manufacturing a slotted laminated magnetic core and conforming selected portions of restricted slot entrance surfaces of the magnetic core to a predetermined configuration, pairs of the entrance surfaces each defining a restricted core passageway that communicates with a coil accommodating slot in the core, the method comprising the steps: forming a laminated slotted magnetic core having slots therein by stacking together a plurality of slotted laminations; orienting the slotted magnetic core so formed relative to an apparatus having at least one tool having selected surface regions corresonding to the predetermined configuration and positioning the selected surfaces of the tool and selected portions of at least some of the restricted slot entrance surfaces of the magnetic core adjacent to one another; urging the selected surface regions of the at least one tool and the selected portions of the surfaces of the magnetic core into force transmitting contact with one another and forcing the selected portions of the at least some of the restricted slot entrance surfaces of the magnetic core to conform to the selected surface regions of the tool; and separating the at least one tool and the core.
Claim 11
Dependent Claim
54 words
The method of claim 7 further comprising the step of gauging at least the entrance of the at least one restricted core passapeway prior to urging the selected surface regions of the at least one tool and the selected portions of the surfaces of the magnetic core into force transmitting contact with one another.
Claim 12
Dependent Claim
91 words
The method of claim 7 including conforming to predetermined configurations selected portions of the surfaces of a magnetic core along a plurality of spaced apart restricted core passageways; orienting the magnetic core relative to a plurality of spaced apart elongate tools by effecting axial movement of the core relative to the elongate tools with portions of the tools projecting into the entrances of restricted core passageways; and substantially simultaneously urging selected surface regions of a plurality of the tools into force transmitting contact with selected surface portions of the magnetic core.
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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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |