US3857270A - Method of shaping sheet material - Google Patents
Method of shaping sheet material Download PDFInfo
- Publication number
- US3857270A US3857270A US00412864A US41286473A US3857270A US 3857270 A US3857270 A US 3857270A US 00412864 A US00412864 A US 00412864A US 41286473 A US41286473 A US 41286473A US 3857270 A US3857270 A US 3857270A
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- US
- United States
- Prior art keywords
- area
- sheet
- sheet material
- relieved
- shaping
- 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
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- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
Definitions
- ABSTRACT The subject matter concerns a method of shaping sheet material in the fabrication of articles therefrom having modified corner areas resulting from bending the sheet to a desired shape of the product, the sheet being relieved, that is, thinned down, prior to bending on the ultimate inside of the bend whereby the corresponding corner area at the apex of the angle is drawn in and sharp corners are avoided or suitably reduced.
- the invention concerns a method of shaping sheet material particularly directed to producing an indented corner. Under normal conditions of shaping by bending a sheet material a sharp corner area commonly results which in the further operations of fabricating the intended article may interfere with the automatic machine manipulations. Also such corner shapes often are undesirable in the final product from the standpoint of appearance and comfort in handling. Accordingly, various operations have been employed to reduce the corner area such as by machining off or coining or stamping down the external surface at the corner either prior to or after its formation. Such operations however usually complicate the fabricating operations and add to the overall cost and manufacturing-steps.
- the present invention provides a very effective and much simplified procedure for accomplishing the corner indentation. Basically, it embodies the step of re lieving in advance the area at the eventual apex of the angle formed by the bend on the side which becomes the inside of the angle formed by the bending step.
- the operation of relieving the area may be any one of known mechanical steps such as by cutting away material at the critical area or by stamping or coining.
- the stresses produced by the bending are such as to cause the remaining thinner area to be automatically drawn in at the apex of the angle thereby indenting the corner below the normal outer surface of the sheet at that area.
- FIGS. la, lb and 1c illustrate the basic features of the invention.
- FIG. la being a section of the original flat sheet material
- FIG. lb showing the material bent around the relieved area
- FIG. 10 is a crosssectional view taken on the plane I c of FIG. lb.
- FIGS. 2a to 2d illustrate another application of the principles of the invention in which FIG. 2a is a section of the original sheetmaterial, FIG. 2b shows the sheet is formed into a part having two angles, and FIGS. 2c and 2d are cross-sections taken on the planes II c and II d respectively of FIG. 2.
- FIGS. 3a to 3c correspond to FIGS. la to 10 respectively and show a different form of relieved area.
- FIG. 4a is a view in perspective of a shell for an injector blade dispenser embodying the features of the invention.
- FIG. 4b is an end view thereof on an enlarged scale.
- FIGS. 5a to Sc correspond to FIGS. la to It but include an opening through the sheet material in association with the relieved area.
- FIGS. 6a to 6c likewise correspond to FIGS. In to 10 but illustrate a tapered form of relieved area.
- FIG. la depicts a section of sheet material 10 having a relieved area 11 on one side, the area in this case being half moon shape.
- the re lieved area may be formed in any suitable manner as by machining away the area or by coining or stamping.
- the method may be applied to any desired sheet material having for best results substantial ductility as, for example, a metal such as aluminum, iron or copper or alloys thereof.
- the sheet is bent into a desired angle needed for the ultimate product, FIG. lb showing it bent into a right angle about an axis 12.
- the relieved area 11 corresponds to the compression side of the neutral axis 13 and the remaining area 14 at the apex of the angle comprises the tension area.
- the tensed area 14 due to the resulting vector forces, displaces inward toward the bend axis as illustrated in FIG. lb resulting in an indentation 15 extending around the apex of the angle.
- the indentation decreases progressively as the area 11 merges into the adjacent unrelieved areas of the sheet.
- the precise final shape or result depends upon factors which may be varied such as the ductility of the material, the bend angle and the configuration of the relief, that is the depth, width and length.
- the relief length in FIG. 1 is indicated by the dimension 16 and may be defined as the total distance of the relief along the bend axis
- the relief width may be defined as the sum of the distances at each side from the bend axis perpendicular to the axis indicated by the dimension 17 in FIG. la.
- the relieved area 20 is more extended in width than in FIG. la and the sheet is bent at two areas of different angle resulting in the indented corner areas 21 and 22.
- FIGS. 3a to 3c illustrate the invention in which the sheet 30 has the full basic material thickness at each side of the relieved area 31.
- the relieved area 31 is spaced entirely inwardly from the opposite edges 32 and 33 of the sheet 30 resulting in an intermediate. indented area 34.
- the indented area reduces progressively as it merges into the adjacent portions of the sheet as indicated at 34a.
- the shell 40 has corners 41 which are formed in the manner illustrated in general in FIGS. la to 1c.
- the method results in the avoidance or reduction of sharp or protruding corners as an advantage in the final product; and in the manufacturing process of shaping and loading the dispenser 40 it is of distinct advantage in eliminating interfering engagement or hang-up at stages in the shaping and handling and loading of the dispenser.
- FIGS. 50 to Sc illustrate a sheet 50 having a relieved area 51 and an opening through the sheet material at 52 in a form in this case of a slot, the slot extending through the bend axis 53 at the apex.
- the indentation 54 at the corner is uniform because of the interruption at the opening 52 as distinguished from the progressive tapered drawin shape shown in the previous examples.
- FIGS. 60 to 60 illustrate the result with a tapered relief.
- the sheet 60 has a relief 61 which is tapered as indicated particularly in FIG. 6c at 62 which results in a tapered indentation 63 which is at a maximum at the extreme edge 64.
- a method of shaping sheet material comprising relieving the material at an area at one side of the sheet, and bending the sheet about an axis through said area with the area on the inside of the bend, thereby drawing in the sheet material at the apex of the angle formed by the bend.
- a method of indenting inwardly the corner area of a bent sheet of material comprising relieving the material on one side of the sheet at an area to become said corner area, and bending the sheet through said relieved area with the area on the inside of the bend.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00412864A US3857270A (en) | 1973-11-05 | 1973-11-05 | Method of shaping sheet material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00412864A US3857270A (en) | 1973-11-05 | 1973-11-05 | Method of shaping sheet material |
Publications (1)
Publication Number | Publication Date |
---|---|
US3857270A true US3857270A (en) | 1974-12-31 |
Family
ID=23634805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US00412864A Expired - Lifetime US3857270A (en) | 1973-11-05 | 1973-11-05 | Method of shaping sheet material |
Country Status (1)
Country | Link |
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US (1) | US3857270A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4061098A (en) * | 1976-08-27 | 1977-12-06 | Toyota Jidosha Kogyo Kabushiki Kaisha | Process for bending metal sheet |
FR2561056A1 (en) * | 1984-03-06 | 1985-09-13 | Telemecanique Electrique | Forming metal enclosure for electrical appts. |
US4841824A (en) * | 1988-02-18 | 1989-06-27 | Andreas Stihl | Saw chain for a chain saw |
US5136773A (en) * | 1988-11-08 | 1992-08-11 | Francois Mesnel | Method of forming a shaped section for guiding and sealing a movable window |
US5203069A (en) * | 1989-10-31 | 1993-04-20 | Gebr. Hennig Gmbh | Method of producing a telescopic cover with rounded corners |
US6260402B1 (en) | 1999-03-10 | 2001-07-17 | Simpson Strong-Tie Company, Inc. | Method for forming a short-radius bend in flanged sheet metal member |
US6368062B1 (en) * | 2000-06-06 | 2002-04-09 | Fuji Industrial Co., Ltd. | Turbo fan for range hood and range hood storing turbo fan |
US20030097956A1 (en) * | 2001-05-23 | 2003-05-29 | National Steel Car Limited | Well car with cross member and method |
US20040079044A1 (en) * | 2002-10-23 | 2004-04-29 | Steve Troth | Hip jackgirder connection |
US20040244328A1 (en) * | 2003-05-19 | 2004-12-09 | Simpson Strong-Tie Company, Inc. | Beam shoe |
US20060044728A1 (en) * | 2004-07-28 | 2006-03-02 | Kim Jun-Ho | Secondary protective element for secondary battery |
US20060277964A1 (en) * | 2005-06-09 | 2006-12-14 | Basavaraj-Rajashekhar Kappali | Method for fabricating an exterior part of a camera |
US20080209845A1 (en) * | 2006-10-31 | 2008-09-04 | Simpson Strong-Tie Company, Inc. | Quadruple mono truss connection |
US8443569B2 (en) | 2009-11-06 | 2013-05-21 | Simpson Strong-Tie Company, Inc. | Four-way radial connector |
DE102024000076A1 (en) | 2024-01-11 | 2024-03-07 | Mercedes-Benz Group AG | Method for forming at least one sheet metal part and forming device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US21792A (en) * | 1858-10-12 | Improvement in harvesters | ||
US1497890A (en) * | 1923-04-09 | 1924-06-17 | Wm Bros Boiler & Mfg Co | Table top and process of making the same |
US1959027A (en) * | 1929-03-15 | 1934-05-15 | Gen Spring Bumper Corp | Method of making a vehicle bumper bar |
US3710165A (en) * | 1970-07-03 | 1973-01-09 | Tokyo Shibaura Electric Co | Shadow mask perforated along intersection of side wall and reinforcing flange |
-
1973
- 1973-11-05 US US00412864A patent/US3857270A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US21792A (en) * | 1858-10-12 | Improvement in harvesters | ||
US1497890A (en) * | 1923-04-09 | 1924-06-17 | Wm Bros Boiler & Mfg Co | Table top and process of making the same |
US1959027A (en) * | 1929-03-15 | 1934-05-15 | Gen Spring Bumper Corp | Method of making a vehicle bumper bar |
US3710165A (en) * | 1970-07-03 | 1973-01-09 | Tokyo Shibaura Electric Co | Shadow mask perforated along intersection of side wall and reinforcing flange |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4061098A (en) * | 1976-08-27 | 1977-12-06 | Toyota Jidosha Kogyo Kabushiki Kaisha | Process for bending metal sheet |
FR2561056A1 (en) * | 1984-03-06 | 1985-09-13 | Telemecanique Electrique | Forming metal enclosure for electrical appts. |
US4841824A (en) * | 1988-02-18 | 1989-06-27 | Andreas Stihl | Saw chain for a chain saw |
US5136773A (en) * | 1988-11-08 | 1992-08-11 | Francois Mesnel | Method of forming a shaped section for guiding and sealing a movable window |
US5203069A (en) * | 1989-10-31 | 1993-04-20 | Gebr. Hennig Gmbh | Method of producing a telescopic cover with rounded corners |
US6260402B1 (en) | 1999-03-10 | 2001-07-17 | Simpson Strong-Tie Company, Inc. | Method for forming a short-radius bend in flanged sheet metal member |
US6368062B1 (en) * | 2000-06-06 | 2002-04-09 | Fuji Industrial Co., Ltd. | Turbo fan for range hood and range hood storing turbo fan |
US20050066852A1 (en) * | 2001-05-23 | 2005-03-31 | National Steel Car Limited | Well car with cross member |
US20030097956A1 (en) * | 2001-05-23 | 2003-05-29 | National Steel Car Limited | Well car with cross member and method |
US6877226B2 (en) * | 2001-05-23 | 2005-04-12 | National Steel Car Limited | Well car with cross member and method |
US7334528B2 (en) | 2001-05-23 | 2008-02-26 | National Steel Car Limited | Well car with cross member |
US7913472B2 (en) | 2002-10-23 | 2011-03-29 | Simpson Strong-Tie Company, Inc. | Hip jackgirder connection |
US20040079044A1 (en) * | 2002-10-23 | 2004-04-29 | Steve Troth | Hip jackgirder connection |
US20040244328A1 (en) * | 2003-05-19 | 2004-12-09 | Simpson Strong-Tie Company, Inc. | Beam shoe |
US7971409B2 (en) | 2003-05-19 | 2011-07-05 | Simpson Strong-Tie Company, Inc. | Beam shoe |
US20060044728A1 (en) * | 2004-07-28 | 2006-03-02 | Kim Jun-Ho | Secondary protective element for secondary battery |
US7231800B2 (en) * | 2005-06-09 | 2007-06-19 | Hewlett-Packard Deveopment Company, L.P. | Method for fabricating an exterior part of a camera |
US20060277964A1 (en) * | 2005-06-09 | 2006-12-14 | Basavaraj-Rajashekhar Kappali | Method for fabricating an exterior part of a camera |
US7503148B2 (en) | 2006-10-31 | 2009-03-17 | Simpson Strong-Tie Company, Inc. | Quadruple mono truss connection |
US20080209845A1 (en) * | 2006-10-31 | 2008-09-04 | Simpson Strong-Tie Company, Inc. | Quadruple mono truss connection |
US8443569B2 (en) | 2009-11-06 | 2013-05-21 | Simpson Strong-Tie Company, Inc. | Four-way radial connector |
DE102024000076A1 (en) | 2024-01-11 | 2024-03-07 | Mercedes-Benz Group AG | Method for forming at least one sheet metal part and forming device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BANKERS TRUST COMPANY A NEW YORK BANKING CORPORATI Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN SAFETY RAZOR COMPANY;REEL/FRAME:004324/0601 Effective date: 19840709 |
|
AS | Assignment |
Owner name: AMERICAN SAFETY RAZOR COMPANY, RAZOR BLADE LANE, A Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PHILIP MORRIS INCORPORATED;REEL/FRAME:004305/0207 Effective date: 19840816 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |
|
AS | Assignment |
Owner name: AMERICAN SAFETY RAZOR COMPANY Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANKERS TRUST COMPANY, AS AGENT;REEL/FRAME:005351/0018 Effective date: 19890413 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF BOSTON, THE Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN SAFETY RAZOR COMPANY, A DE CORP.;REEL/FRAME:005385/0278 Effective date: 19890414 |
|
AS | Assignment |
Owner name: AMERICAN SAFETY RAZOR COMPANY, VIRGINIA Free format text: TERMINATION OF SECURITY INTEREST IN PATENTS;ASSIGNOR:FIRST NATIONAL BANK OF BOSTON, THE, AS AGENT;REEL/FRAME:007919/0324 Effective date: 19950803 |