US3469430A - Edge contouring of metal strip and metal strip product - Google Patents
Edge contouring of metal strip and metal strip product Download PDFInfo
- Publication number
- US3469430A US3469430A US668096A US3469430DA US3469430A US 3469430 A US3469430 A US 3469430A US 668096 A US668096 A US 668096A US 3469430D A US3469430D A US 3469430DA US 3469430 A US3469430 A US 3469430A
- Authority
- US
- United States
- Prior art keywords
- strip
- metal strip
- edge
- edges
- metal
- 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
Links
Images
Classifications
-
- 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 by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0294—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a localised treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/005—Edge deburring or smoothing
-
- 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
- C21D2221/00—Treating localised areas of an article
- C21D2221/02—Edge parts
-
- 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 by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
Definitions
- metal strip particularly thin' metal strip which has been cut from wider widths of metal strip, such as in the manufacture of copper strip for winding electrical transformers
- the method of the invention goes beyond the prior art teachings in that it relies on the heretofore undiscovered principle that melting the edge area to the liquid state under controlled conditions which balance the surface tension of the metal against the force of gravity will result in the desired rounded contour at the edge of the strip without mechanical rolling.
- the edges, having been heated to the liquid state are characterized by a long columnar grain structure (a characteristic of a cast metal as opposed to the small grain structure which would characterize metal in the wrought condition that had not reached the liquid state).
- the strip can be contoured .at its edge at speeds of 300 feet per minute while preserving the flatness of the strip and without any rippling as would occur with a mechanical contouring of the edges.
- Strips subsequently coated with a lacquer insulation provide a uniform insulation over the surface because of the absence of any sharp edges which might tend to weaken the insulation.
- the invention provides a method of rounding the edges of metal strip comprising passing the strip through a heat source and melting the edge of the metal to'a liquid state and removing the metal strip from the heat source'before the force of gravity acting on the volume of liquid metal exceeds the surface tension force acting on the liquid metal and holding it in a rounded cross-sectional edge configuration.
- the liquid edge is then solidified by cooling so that it retains itssemi-circular edge configuration and is characterized by longcolumnar grains extending 15 rounded cross-sectional configuration at the liquid edges 1' laterally outward in the plane of the strip along that edge portion of the strip which had been melted to the liquid state.
- FIG. 1 is a side elevation of a schematic of apparatus for practicing the method of the invention
- FIG. 2 is a fragmentary plan view taken along line 2-2 of FIG. 1;
- FIG. 3 is an enlarged section taken along of FIG. 2;
- FIG. 4 is an enlarged section taken along line 44 of FIG. 2;
- FIG. 5 is a photomicrograph of a cross-section of edge contoured copper strip produced according to the method of the invention.
- metal strip is unwound from a feed roll 10 through a melting zone 11 and rewound on a wind-up roll 12.
- a melting zone 11 At the melting zone 11 are provided two pairs of rollers 13 and 14 which serve to position the side edges of a strip 15 accurately in relation to tungsten inert gas heating elements 16 and 17 which are slightly spaced from the side edges of the strip 15.
- a copper strip nominally .020" thick was passed through apparatus as shown in FIGS. 1 and 2 and the tungsten inert gas heating elements were spaced a distance sufficient to melt only a segment of the edges to the liquid state.
- the strip was passed through the heating zone at a speed of 28 feet per minute and this was sufiicient to melt the flat edge 18 as shown in FIG. 3 to a liquid state and for a time insufiicient for the force of gravity to overcome the inherent surface tension along the flat broad faces of the strip and thereby retain the rounded configuration shown in dotted in FIG. 3 and rounded in FIG. 4.
- the rounded contour eliected by this melting operation is generally semi-circular in crosssection and free of sharp edges. It is therefore eminently suitable for coating with a lacquer or other insulation. It has also been found that the radius of curvature which will satisfy the balance between the surface tension and force of gravity is generally in the order of one-half the thickness of the metal strip. Thus in the example given the radius of the edge was .010 inch.
- FIG. 5 an end edge segment of a copper strip which had been made according to the method just described is shown and it is characterized by long columnar grains lines 3-3 which indicate that the edge reached the liquid state,
- a method of rounding'the edge of metal strip comprising passing'the strip through a heat source and melting, the edge of the metal to a liquid state, removing the metal strip, from the heat source before the force of gravity acting on the volume of liquid metal exceeds the surface tension force acting on the liquid metal and holding it in a rounded'cross-sectional edge configuration and solidifying the edge by cooling so that it retains its rounded edge configuration characterized by long columnar grains extending laterally outward in the plane of the'strip along that edge portion of the strip which had been melted to the liquid state.
- a flat metal strip produced according to the method of'claim 1 having rounded edges which are characterized by long columnar grains "extending laterally outward in the plane of the strip along the curved segment at the edge of the strip.
Description
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US66809667A | 1967-09-15 | 1967-09-15 | |
GB4349069 | 1969-09-03 | ||
DE19691945069 DE1945069A1 (en) | 1967-09-15 | 1969-09-05 | Rounding the slit edges of metal strip |
FR6930511A FR2063264A5 (en) | 1969-09-03 | 1969-09-08 | Rounding the slit edges of metal strip |
Publications (1)
Publication Number | Publication Date |
---|---|
US3469430A true US3469430A (en) | 1969-09-30 |
Family
ID=27430949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US668096A Expired - Lifetime US3469430A (en) | 1967-09-15 | 1967-09-15 | Edge contouring of metal strip and metal strip product |
Country Status (2)
Country | Link |
---|---|
US (1) | US3469430A (en) |
DE (1) | DE1945069A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3545244A (en) * | 1968-09-26 | 1970-12-08 | Anaconda American Brass Co | Proximity yoke apparatus |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3241938A (en) * | 1963-01-15 | 1966-03-22 | Pittsburgh Plate Glass Co | Manufacture of glass sheets |
US3323342A (en) * | 1965-03-31 | 1967-06-06 | Coil Anodizers Inc | Method and means for smoothing edges of strip material |
US3351447A (en) * | 1963-08-15 | 1967-11-07 | Pilkington Brothers Ltd | Method and apparatus for the manufacture of flat glass on a molten metal bath |
US3409423A (en) * | 1963-04-16 | 1968-11-05 | Saint Gobain | Method and apparatus for manufacture of flat glass |
-
1967
- 1967-09-15 US US668096A patent/US3469430A/en not_active Expired - Lifetime
-
1969
- 1969-09-05 DE DE19691945069 patent/DE1945069A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3241938A (en) * | 1963-01-15 | 1966-03-22 | Pittsburgh Plate Glass Co | Manufacture of glass sheets |
US3409423A (en) * | 1963-04-16 | 1968-11-05 | Saint Gobain | Method and apparatus for manufacture of flat glass |
US3351447A (en) * | 1963-08-15 | 1967-11-07 | Pilkington Brothers Ltd | Method and apparatus for the manufacture of flat glass on a molten metal bath |
US3323342A (en) * | 1965-03-31 | 1967-06-06 | Coil Anodizers Inc | Method and means for smoothing edges of strip material |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3545244A (en) * | 1968-09-26 | 1970-12-08 | Anaconda American Brass Co | Proximity yoke apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE1945069A1 (en) | 1971-03-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ATLANTIC RICHFIELD COMPANY, A PA CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ANACONDA COMPANY THE, A DE CORP;REEL/FRAME:003992/0218 Effective date: 19820115 |
|
AS | Assignment |
Owner name: AMERICAN BRASS COMPANY, L.P., A DELAWARE LIMITED P Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. SUBJECT TO LICENSE RECITED;ASSIGNOR:ATLANTIC RICHFIELD COMPANY, A CORP. OF DE.;REEL/FRAME:004492/0486 Effective date: 19851129 |
|
AS | Assignment |
Owner name: CONTINENTAL BANK OF CANADA, NEW YORK BRANCH, 245 P Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN BRASS COMPANY, L.P., A DELAWARE LIMITED PARTNERSHIP;REEL/FRAME:004510/0187 Effective date: 19851206 Owner name: HELLER FINANCIAL CENTRAL, INC., 105 WEST ADAMS STR Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN BRASS COMPANY, L.P., A DELAWARE LIMITED PARTNERSHIP;REEL/FRAME:004510/0187 Effective date: 19851206 |
|
AS | Assignment |
Owner name: ANSONIA COPPER & BRASS, INC., 75 LIBERTY STREET, A Free format text: LICENSE;ASSIGNOR:AMERICAN BRASS COMPANY;REEL/FRAME:004539/0570 Effective date: 19860212 |
|
AS | Assignment |
Owner name: BANCBOSTON FINANCIAL COMPANY,CONNECTICUT Free format text: SECURITY INTEREST;ASSIGNOR:ANSONIA COPPER & BRASS, INC.,;REEL/FRAME:004760/0875 Effective date: 19870716 Owner name: BANCBOSTON FINANCIAL COMPANY, ONE LANDMARK SQUARE, Free format text: SECURITY INTEREST;ASSIGNOR:ANSONIA COPPER & BRASS, INC.,;REEL/FRAME:004760/0875 Effective date: 19870716 |
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AS | Assignment |
Owner name: BANCBOSTON FINANCIAL COMPANY A MA CORPORATION, CO Free format text: SECURITY INTEREST;ASSIGNOR:ANSONIA COPPER & BRASS, INC., A DE CORPORATION;REEL/FRAME:005748/0076 Effective date: 19870716 |
|
AS | Assignment |
Owner name: BANK OF BOSTON CONNECTICUT A CORP. OF CONNECTIC Free format text: SECURITY INTEREST;ASSIGNOR:ANSONIA COPPER & BRASS, INC. A CORP. OF DELAWARE;REEL/FRAME:005947/0393 Effective date: 19910828 |
|
AS | Assignment |
Owner name: ANSONIA COPPER & BRASS, INC., CONNECTICUT Free format text: TERM. OF SECURITY INTEREST;ASSIGNOR:FLEET NATIONAL BANK F/K/A BANK OF BOSTON CT;REEL/FRAME:012463/0815 Effective date: 20010424 Owner name: GENERAL ELECTRIC CAPITAL CORPORATION, CONNECTICUT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ANSONIA COPPER & BRASS, INC.;REEL/FRAME:012463/0855 Effective date: 20010330 Owner name: ANSONIA COPPER & BRASS, INC., CONNECTICUT Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:FLEET NATIONAL BANK FKA A BANK OF BOSTON CT;REEL/FRAME:012463/0809 Effective date: 20010328 |