US3163201A - Process and apparatus for producing conductive sheet material having low power losses - Google Patents

Process and apparatus for producing conductive sheet material having low power losses Download PDF

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Publication number
US3163201A
US3163201A US87444A US8744461A US3163201A US 3163201 A US3163201 A US 3163201A US 87444 A US87444 A US 87444A US 8744461 A US8744461 A US 8744461A US 3163201 A US3163201 A US 3163201A
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US
United States
Prior art keywords
sheet
power losses
rollers
sheet material
low power
Prior art date
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
Application number
US87444A
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English (en)
Inventor
Schmidt Theodor
Wunning Jochen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INDUGAS GES fur IND GASVERWEND
Indugas Gesellschaft fur Industrielle Gasverwendung M B H
Original Assignee
INDUGAS GES fur IND GASVERWEND
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by INDUGAS GES fur IND GASVERWEND filed Critical INDUGAS GES fur IND GASVERWEND
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Publication of US3163201A publication Critical patent/US3163201A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the working steps
    • C21D8/1233—Cold rolling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the working steps
    • C21D8/1238—Flattening; Dressing; Flexing

Definitions

  • Our present invention relates to the manufacture of conductive sheet material and, more particularly, to a process and an apparatus for producing sheet-metal bodies such as plates, bands and strips which have low power losses and which may therefore be used economically for electric transducers (e.g. transformers), electromechanical machines (e.g. motors and generators) and the like.
  • electric transducers e.g. transformers
  • electromechanical machines e.g. motors and generators
  • Conductive plates, bands and strips adapted to be used in the above-mentioned electric devices and in others wherein low power losses due to eddy-current effects are required, have been manufactured hitherto by processes in which the raw high-loss sheets and strips are finished by annealing and subsequent cold working to improve their electrical performance.
  • the cold working generally involved the passing of the sheet material between the rollers of a conventional cold-rolling mill, usually under tension and in a repeated operation to realize the desired effect.
  • These cold-rolling processes necessitated considerable deformation, often reducing the bulk of the sheets by about upon each pass between the rollers, in order to reduce the loss factor of the material to any satisfactory extent.
  • the rollers utilized in these processes experienced substantial Wear and required frequent adjustment and/or replacement while the finished sheet was always of diminished thickness.
  • Other known sheettreating processes for reducing power losses were equally unsatisfactory.
  • Still another object of the present invention is to provide means for reducing the power losses of such sheets without permanently deforming them.
  • metallic plates and strips having relatively high power losses may be treated to reduce these losses by a process in which each part of a sheet-metal body having the desired final thickness is alternately bent in opposite directions and thereafter straightened substantially without compression.
  • the sheet may thus be passed through a corrugating device having a plurality of spaced-apart rollers alternatingly engaging the sheet on opposite sides thereof and extending transversely to the direction of travel of the sheet. ing configuration and thereafter drawn from the device as a flattened body.
  • the finished material will then be found to have substantially reduced power losses and a thickness generally equal to that of the starting material.
  • the sheet is, moreover, heat-treated or annealed during corrugation or subsequently thereto to complete and perpetuate the rearrangement of its molecular structure.
  • the corrugating device is, according to a more specific feature of the invention, disposed adjacent an annealing furnace through which the sheet passes during or after its mechanical deformation.
  • the rollers of the device are then advantageously provided with cooling means adapted to regulate the temperature of the sheet.
  • the process according to the invention does not require frequent adjustment and replacement of the deforming rollers. a sheet pass through the same sequence of deformations. Sheets treated by our process, therefore, have reproducible power factors and other electrical and magnetic characteristics which are substantially uniform over their entire length and width. The effects of the rollers are cumulative up to a point, hence an increase in the number of rollers will oftenaiford greater improvement,
  • a conventionally manufactured metal sheet or strip 1 with the usual high power losses emerges hot from a heating chamber 3a, advancing in the direction of arrowA between two sets of opposing rollers 2, 2 of a corrugating device 26 and thence passing through an annealing furnace 3b.
  • anytwo rollers 2 and 2' which may be individually or jointly adjustable as indicated by the arrows C and C, is always greater 7 than the thickness of the sheet-metal body 1 so that the latter will not undergo any compression on its passage through the device 20.
  • the rollers 2, 2' temporarily deform the sheet 1 into an undulating pattern which remains stationary as the sheet advances through the heating Zone 3a, 3b.
  • the exact sheet temperature during deformation may be further controlled by passing a cooling (or heating) fluid through the rollers as is well known per se.
  • the apparatus shown in the drawing may constitute one of the stages of a plant for the continuous manufacture of sheet-metal plates, strips and
  • the heating chamber 3a may be constituted by the final hot-rolling stage from which the sheets emerge with substantially their design thickness.
  • a process for reducing the electric power losses of a sheet-metal body comprising the steps of heating said body to ailelevated temperature close to the recrystalli zation temperature of the metal, bending the heated body in an undulating pattern Without substantial alteration of the dimensions thereof, straightening 'said body and annealing said body.
  • f v a 3 A process for reducing the electric power losses of a sheetemetal body, comprising the steps of progressively advancing said body through a heating zone, successively transverse axes on opposite sides thereof without substan-:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
US87444A 1960-02-10 1961-02-06 Process and apparatus for producing conductive sheet material having low power losses Expired - Lifetime US3163201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ17676A DE1205124B (de) 1960-02-10 1960-02-10 Verfahren zur Herstellung von Elektroblechen oder -baendern mit geringen Wattverlusten

Publications (1)

Publication Number Publication Date
US3163201A true US3163201A (en) 1964-12-29

Family

ID=7199638

Family Applications (1)

Application Number Title Priority Date Filing Date
US87444A Expired - Lifetime US3163201A (en) 1960-02-10 1961-02-06 Process and apparatus for producing conductive sheet material having low power losses

Country Status (4)

Country Link
US (1) US3163201A (fr)
BE (1) BE599254A (fr)
DE (1) DE1205124B (fr)
GB (1) GB915178A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728782A (en) * 1970-10-08 1973-04-24 Kabel Metallwerke Ghh Process for the production of straight-bead welded pipe
US4826138A (en) * 1984-02-24 1989-05-02 Van Dorn Company Apparatus for heat treating steel plates
US20230183093A1 (en) * 2021-12-15 2023-06-15 Toyota Jidosha Kabushiki Kaisha Production apparatus and production method for cathode active material for lithium ion secondary batteries

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016740A (en) * 1973-12-27 1977-04-12 Nippon Steel Corporation Method and an apparatus for the manufacture of a steel sheet
CN111426722B (zh) * 2020-03-24 2022-04-19 北京科技大学 一种快速确定金属材料再结晶温度的装置和方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1965559A (en) * 1933-08-07 1934-07-03 Cold Metal Process Co Electrical sheet and method and apparatus for its manufacture and test
US2040442A (en) * 1932-11-30 1936-05-12 Bethlehem Steel Corp Method of treating sheet metal
US2071596A (en) * 1933-07-08 1937-02-23 Ungerer Fritz Method for the hot straightening of plates
US2347904A (en) * 1941-07-26 1944-05-02 Gerald G Greulich Method of cold-working metallic bars
US2438240A (en) * 1945-09-28 1948-03-23 Chase Brass & Copper Co Method for straightening rods
US2588439A (en) * 1949-06-29 1952-03-11 United States Steel Corp Continuously processing ferrous strip or sheet material
US2638143A (en) * 1949-07-28 1953-05-12 Frederick K Maust Roller leveler
US2870818A (en) * 1954-10-08 1959-01-27 Herr Equipment Corp Resilient roll apparatus for working tenuous material
US3094442A (en) * 1959-04-13 1963-06-18 Armco Steel Corp Methods of producing extreme flatness in heat treated stainless steel and the like

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE703208C (de) * 1933-11-01 1941-03-04 Hoesch Akt Ges Verfahren zur Verbesserung der magnetischen Eigenschaften von Eisenbaendern und -blechen mit 0, 5í¬4% Silizium
DE707940C (de) * 1936-07-03 1941-07-08 Bandeisenwalzwerke Akt Ges Verfahren zur Herstellung von Gegenstaenden mit glatter Oberflaeche bei grober Kornausbildung aus magnetischen Stahlblechen bzw. -baendern

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2040442A (en) * 1932-11-30 1936-05-12 Bethlehem Steel Corp Method of treating sheet metal
US2071596A (en) * 1933-07-08 1937-02-23 Ungerer Fritz Method for the hot straightening of plates
US1965559A (en) * 1933-08-07 1934-07-03 Cold Metal Process Co Electrical sheet and method and apparatus for its manufacture and test
US2347904A (en) * 1941-07-26 1944-05-02 Gerald G Greulich Method of cold-working metallic bars
US2438240A (en) * 1945-09-28 1948-03-23 Chase Brass & Copper Co Method for straightening rods
US2588439A (en) * 1949-06-29 1952-03-11 United States Steel Corp Continuously processing ferrous strip or sheet material
US2638143A (en) * 1949-07-28 1953-05-12 Frederick K Maust Roller leveler
US2870818A (en) * 1954-10-08 1959-01-27 Herr Equipment Corp Resilient roll apparatus for working tenuous material
US3094442A (en) * 1959-04-13 1963-06-18 Armco Steel Corp Methods of producing extreme flatness in heat treated stainless steel and the like

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728782A (en) * 1970-10-08 1973-04-24 Kabel Metallwerke Ghh Process for the production of straight-bead welded pipe
US4826138A (en) * 1984-02-24 1989-05-02 Van Dorn Company Apparatus for heat treating steel plates
US20230183093A1 (en) * 2021-12-15 2023-06-15 Toyota Jidosha Kabushiki Kaisha Production apparatus and production method for cathode active material for lithium ion secondary batteries
CN116263301A (zh) * 2021-12-15 2023-06-16 丰田自动车株式会社 锂离子二次电池用正极活性物质的制造装置以及制造方法
JP2023088719A (ja) * 2021-12-15 2023-06-27 トヨタ自動車株式会社 リチウムイオン二次電池用正極活物質の製造装置及び製造方法
US12091327B2 (en) * 2021-12-15 2024-09-17 Toyota Jidosha Kabushiki Kaisha Production apparatus and production method for cathode active material for lithium ion secondary batteries

Also Published As

Publication number Publication date
BE599254A (fr) 1961-05-16
GB915178A (en) 1963-01-09
DE1205124B (de) 1965-11-18

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