US3461758A - Method of making scrapless laminations for producing a plurality of units - Google Patents

Method of making scrapless laminations for producing a plurality of units Download PDF

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Publication number
US3461758A
US3461758A US3461758DA US3461758A US 3461758 A US3461758 A US 3461758A US 3461758D A US3461758D A US 3461758DA US 3461758 A US3461758 A US 3461758A
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United States
Prior art keywords
laminations
legs
core
members
scrapless
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
Inventor
Bruno B Michiulis
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Sola Basic Industries Inc
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Sola Basic Industries Inc
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/002—Branching pipes; Joining pipes to walls of concrete, cement or asbestos-cement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
    • Y10T29/49078—Laminated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0491—Cutting of interdigitating products

Definitions

  • This invention relates to laminated or stacked core structures for electrial induction apparatus such as constant voltage and current devices, transformers, reactors, magnetic amplifiers, and the like. More particularly, the invention relates to a method for the substantially scrapless stamping from a thin sheet or strip of magnetic material of a plurality of laminations or core components having a plurality of different shapes or configurations for building up a plurality of different core structures which can be made from a relatively simple die arrangement.
  • a principal object of the present invention is to provide for the economical and substantially scrapless stamping or punching from a single sheet or strip of magnetic material of laminations having a plurality of different shapes or configurations adapted for use in constructing 'various types of magnetic core structures.
  • a further object of the invention is to provide for the economical production of multi-shaped laminations adapted for interchangeable use in constructing core structures of different configurations.
  • a still further object of the invention is to provide for the substantially scrapless production of multi-shaped laminations adapted for use in constructing shell-type core structures having windows of different sizes and disposition.
  • Another object of the invention is the provision of multi-shaped laminations adapted for use in core structures having differently arranged magnetic shunts.
  • Still another object of the invention is to provide for the more economical production of different core structures for various types of power induction apparatus, particularly with respect to apparatus produced by a particular manufacturer.
  • EE double or reverse E member
  • laminations may be interchangeably used to construct, for example, a shell-type core having a center leg and windows of a predetermined size on each side, a similar structure having more elongated windows on each side, and a similar structure utilizing an EB core member to provide a core structure having two or more shunts.
  • two I shaped laminations may be stamped without additional waste to form the components of two complete types of core structures.
  • one or both of the E members may be separated into two L and one I members.
  • FIG. 1 illustrates a strip of magnetic material having a plurality of multi-shaped core laminations arranged thereon in accordance with the present invention
  • FIG. 2 illustrates one type of core structure utilizing the laminations of FIG. 1;
  • FIGS. 3-5 illustrate other types or configurations of core structures interchangeably utilizing the laminations of FIG. 1.
  • a strip 10 of thin magnetic material adapted to be die stamped or punched to provide a plurality of laminations for building up the cores of electrical induction or magnetic apparatus.
  • the lamination pieces are of a plurality of different shapes or configurations adapted for interchangeable use in core structures of different types of induction apparatus.
  • an E lamination or core component 12 having elongated side legs 14 and 16, a center leg 18, and a base portion 20.
  • a reverse or EE lamination 22 having elongated legs 24, 26 and 28, a base section 30, and short legs 32, 34 and 36.
  • E laminations 38 and 40 Nestled between the elongated legs of the opposed E and EE laminations are a pair of E laminations 38 and 40 having short legs 42, 44 and 46.
  • I laminations 48 and 50 Arranged adjacent the base 30 of lamination 22 and at the ends of legs 32, 34 and 36 are one or more I laminations 48 and 50, the lamination 4 8 being shown in full lines and the lamination 50 in dashed lines.
  • interposed between the legs 32, 34 and 36 of EB lamination 22 are two magnetic shunt elements 52 and 54. Similar shunts 52A and 54A (shown in dashed lines) may also be provided in the base 20 of lamination 12 to provide a second EE component and additional shunts if desired.
  • the entire waste is limited to the cut-outs 56 around the short legs of E laminations 38 and 40 and the cut-out 58 around leg 34 of EB component 22 and the shunt element 54. Further diversification also can be obtained by separating the E member 12 into an I and two L sections as indicated by the dashed lines 60.
  • the length of the shortened E members 38 and 40 is the same as the width of the elongated E member 12 and the EB member 22, the center legs 18, 26 and 44 all have the same or equal widths, and the spaces between all of the legs, both short and elongated, are the same or equal so that the respective legs will match up when assembled into core structures as illustrated in FIGS. 2 to 5 and hereinafter described.
  • the I members 48 and 50 have a length equal to the width of the several E and EE members. It will also be evident that one or more I members 48 could be arranged adjacent the E member 12 instead of EB member 22, or additional I members could be so arranged.
  • a single die arrangement can be used with removable inserts for portions 52A, 54A and 56 so as to produce selectively the parts needed. In this manner, the die cost will be kept at a minimum.
  • FIGS. 2 to 5 The utilization of the various multi-shaped laminations or core components produced by the punching or stamping operation of FIG. 1 to build up various core structures is illustrated in FIGS. 2 to 5.
  • FIG. 2 for example, which could be used in a constant voltage device such as shown in U.S. Patent No. 2,143,745, laminations 12 and 48 are combined for one type of core structure.
  • FIG. 3 laminations 12 and 3 8 or 40 are utilized.
  • FIG. 4 which could be used with devices such as illustrated in U.S. Patent No. 2,694,177, laminations 22, 38 or 40, and 48 are used.
  • FIG. illustrates one application of the shunt elements 52 and 54.
  • Magnetic shunts can be used as needed in FIGS. 2, 3 and 4.
  • structures such as shown in FIG. 2, can have legs 14, 16 made to be of a width greater than one-half the width of middle leg 18 as in U.S. Patent No. 2,806,199 and the width of base 20 made greater than one-half the width of leg 18.
  • This is of particular value when the material used to make the laminations is grain oriented. When it is grain oriented, the magnetic properties of such a steel in the cross-grain direction are inferior to those in the with-grain. Thus, the base must be wider for most efficient operation. The desired width can thus be obtained with an optimum scrapless operation.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
US3461758D 1967-01-16 1967-01-16 Method of making scrapless laminations for producing a plurality of units Expired - Lifetime US3461758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60965667A 1967-01-16 1967-01-16

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US3461758A true US3461758A (en) 1969-08-19

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US3461758D Expired - Lifetime US3461758A (en) 1967-01-16 1967-01-16 Method of making scrapless laminations for producing a plurality of units

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US (1) US3461758A (enrdf_load_stackoverflow)
FR (1) FR1557036A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357587A (en) * 1980-02-14 1982-11-02 Wilfried Ernst Sawatzky Core laminations, particularly for transformers
US4361823A (en) * 1979-05-19 1982-11-30 Wilfried Ernst Sawatzky Core laminations for shell-type cores, especially for transformers
US4365224A (en) * 1977-10-25 1982-12-21 Wilfried Ernst Sawatsky Core lamination for shell-type cores, particularly for transformers
US4536952A (en) * 1981-01-12 1985-08-27 Mitsubishi Denki Kabushiki Kaisha Preparation of laminated iron core of electric device
US4547705A (en) * 1982-03-20 1985-10-15 Tdk Corporation Discharge lamp lightening device
US4736452A (en) * 1986-09-17 1988-04-05 The Boeing Company Core coupled transmitter/receiver loops for connectorless entertainment systems
US5418513A (en) * 1991-04-03 1995-05-23 Stanley Electric Co. Ltd. Transformer core in transformer circuit
EP1655747A3 (de) * 2004-11-05 2007-01-17 era GmbH & Co. KG Blechschnitt für einen geschichteten Kern eines Transformators

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2354619A1 (fr) * 1976-06-10 1978-01-06 Banet H Procede de decoupage de toles pour la fabrication de transformateurs

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US509770A (en) * 1893-11-28 Laminated converter-core
US1877254A (en) * 1930-09-12 1932-09-13 Gen Motors Radio Corp Sheet material
GB788222A (en) * 1953-05-27 1957-12-23 Fritz Knobel Improvements in or relating to electromagnetic induction apparatus for fluorescent lamps
US2892249A (en) * 1956-01-10 1959-06-30 Advance Transformer Co Method of manufacturing a transformer core construction
US2934727A (en) * 1955-12-29 1960-04-26 Westinghouse Electric Corp Core construction
US3316621A (en) * 1961-08-08 1967-05-02 Advance Transformer Co Method of manufacturing a shell type transformer core for ballast structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US509770A (en) * 1893-11-28 Laminated converter-core
US1877254A (en) * 1930-09-12 1932-09-13 Gen Motors Radio Corp Sheet material
GB788222A (en) * 1953-05-27 1957-12-23 Fritz Knobel Improvements in or relating to electromagnetic induction apparatus for fluorescent lamps
US2934727A (en) * 1955-12-29 1960-04-26 Westinghouse Electric Corp Core construction
US2892249A (en) * 1956-01-10 1959-06-30 Advance Transformer Co Method of manufacturing a transformer core construction
US3316621A (en) * 1961-08-08 1967-05-02 Advance Transformer Co Method of manufacturing a shell type transformer core for ballast structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365224A (en) * 1977-10-25 1982-12-21 Wilfried Ernst Sawatsky Core lamination for shell-type cores, particularly for transformers
US4361823A (en) * 1979-05-19 1982-11-30 Wilfried Ernst Sawatzky Core laminations for shell-type cores, especially for transformers
US4357587A (en) * 1980-02-14 1982-11-02 Wilfried Ernst Sawatzky Core laminations, particularly for transformers
US4536952A (en) * 1981-01-12 1985-08-27 Mitsubishi Denki Kabushiki Kaisha Preparation of laminated iron core of electric device
US4547705A (en) * 1982-03-20 1985-10-15 Tdk Corporation Discharge lamp lightening device
US4736452A (en) * 1986-09-17 1988-04-05 The Boeing Company Core coupled transmitter/receiver loops for connectorless entertainment systems
US5418513A (en) * 1991-04-03 1995-05-23 Stanley Electric Co. Ltd. Transformer core in transformer circuit
EP1655747A3 (de) * 2004-11-05 2007-01-17 era GmbH & Co. KG Blechschnitt für einen geschichteten Kern eines Transformators

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Publication number Publication date
FR1557036A (enrdf_load_stackoverflow) 1969-02-14

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