US2882952A - Die for use in bending flat metal stock and the like - Google Patents

Die for use in bending flat metal stock and the like Download PDF

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Publication number
US2882952A
US2882952A US713707A US71370758A US2882952A US 2882952 A US2882952 A US 2882952A US 713707 A US713707 A US 713707A US 71370758 A US71370758 A US 71370758A US 2882952 A US2882952 A US 2882952A
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US
United States
Prior art keywords
die
bars
punch
stock
body member
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
US713707A
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English (en)
Inventor
Stanley A Johnson
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.)
CARL PARTEN
GERALD PARTEN
Original Assignee
CARL PARTEN
GERALD PARTEN
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
Publication date
Application filed by CARL PARTEN, GERALD PARTEN filed Critical CARL PARTEN
Priority to US713707A priority Critical patent/US2882952A/en
Priority to CH6834159A priority patent/CH364749A/de
Priority to DE19591402118 priority patent/DE1402118A1/de
Priority to BE575399A priority patent/BE575399A/fr
Application granted granted Critical
Publication of US2882952A publication Critical patent/US2882952A/en
Priority to NL6408858A priority patent/NL6408858A/xx
Anticipated expiration legal-status Critical
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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0263—Die with two oscillating halves
    • 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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies

Definitions

  • This invention relates to apparatus for use in bending flat metal stock such as sheet metal, cold rolled bar stock and the like and more particularly relates to a die for use in conjunction with a bending punch in the ram of a power brake or the like for bending such flat stock.
  • V-shaped female dies In addition to the fact that a large number of sets of dies must be kept on hand, these V-shaped female dies have the disadvantage of producing distinctly per- It will be understood ceptible marks on the metal stock adjacent the bend along the lines at which the edges of the female die engage the sheet metal stock when the punch is rammed into the stock for moving it into the die and producing the bend. These marks are highly objectionable to many manufacturers having rigid quality specifications.
  • An object of my invention is to provide a new and improved die apparatus of simple and inexpensive construction and operation for use in conjunction with a bending punch in a power brake or the like for bending flat metal stock.
  • Another object of my invention is the provision of a die apparatus which, when used with a single punch in a power brake or the like is adapted for producing bends in flat metal stock to a number of different angles.
  • Another object of my invention is the provision of a die apparatus for use in a power brake or the like for producing in flat metal stock, bends which are either sharply angulated or are rounded, depending only on the configuration of the punch which is used therewith, and regardless of whether the bend is sharply angulated or rounded, the degree of bending may be varied over an extremely wide range, up to and beyond right angle bends.
  • a further object of my invention is the provision of novel die apparatus for producing either sharply angulated or rounded bends in flat metal stock such that of two portions of the stock which lie in a common plane before the bending is accomplished, one of the portions may be bent and the other portion may be left in planar condition.
  • Fig. 1 is a top plan view of the die apparatus and showing in dotted lines a typical position of the relationship of the punch and the metal stock in a bending operation; and also showing in dotted lines an alternate position of the die bars;
  • Fig. 2 is an enlarged end elevation view of the invention
  • Fig. 3 is a detail section view through the apparatus and taken on a vertical plane as indicated at 3-3 in Fig. 1 andalso showing the position of a typical punch which may be employed in a power brake in conjunction with the die apparatus;
  • Fig. 4 is a section view substantially similar to Fig. 3 and showing tlie apparatus in shifted condition wherein the punch has engaged the stock and produced a bend therein;
  • Fig. 5 is a composite view showing a number of pieces of flat metal stock bent to varying degrees with the single punch and die set-up shown in Figs. 3 and 4;
  • Fig. 6 is a section view taken on a vertical plane showing the die apparatus in use with a rounded punch as contrasted with the V-shaped punch shown in Figs. 3 and 4;
  • Fig. 7 is a composite view of a number of specimens of flat metal stock bent with a rounded curvature as by the set-up shown in Fig. 6.
  • the present invention is designed for use in a power brake, of which bolster 10 is a part.
  • a power brake of which bolster 10 is a part.
  • On the ram (not shown) of the power brake is mounted an elongate bending punch 11 which, as shown in dotted lines in Fig. 1 to show its orientation with respect to the invention and which may be substantially V-shaped and sharply pointed as shown in Fig. 3, or which may be rounded as is shown in Fig. 6 and indicated by the numeral 11'.
  • the die apparatus or assembly which is indicated in general by numeral 12, includes a body member 13 of rigid steel stock or the like which has means such as a depending rib or tongue 15 for mounting the body member in a predetermined location on the bolster 10 of the power brake, which has a groove or recess 16 into which the rib is inserted.
  • the body member 13 has a flat and horizontally oriented upper surface 17.
  • a pair of elongate die bars 18 and 19 are mounted on the body member 13 in side-by-side relation, below the punch and on opposite sides thereof with the adjacent sides of the bars 18 and 19 engaging each other at a position which is aligned with the direction of movement of the punch 11.
  • the die bars 18 and 19 have flat and highly polished upper surfaces 20 and 21 which lie in a common plane and in alignment with the upper surface 17 of body member 13.
  • the die bars 18 and 19 and the body member 13 have cooperating means for rotatably supporting the die bars on the body member.
  • the die bars 18 and 19 have cylindrically rounded lower or bottom surfaces 22 and 23, and as best seen in Figs. 3 and 4, the die bars 18 and 19 are substantially semi-circular in cross sectional configuration.
  • the body member 13 is provided with a pair of side-by-side bar-supporting cradles 24 extending throughout the entire length of the 'body member and the cradles 24 have cylindrically rounded bar-supporting upper bearing surfaces 24a which are substantially identical in configuration with the rounded bottom surfaces of the bars 18 and 19 whereby to permit rolling oscillation of the bars in the cradles.
  • the bars are substantially semi-circular in cross sectional configuration
  • the upper .surfacesltlaud 21 thereof lie substantially in the rotation axes of the bars Y which extend longitudinally of the bars and on opposite sides of the punch, but it should be understood that the positioning of the surfaces 20 and 21 might be changed such that the surfaces lie either above or below the roration axes.
  • the body member 13 is shaped to define an open and unobstructed area below the inner or adjacent sides of the bars 18 and 19 to permit the punch to move downwardly between the bars, and in the form shown, a groove 25 is formed in the body member 13 throughout the length thereof and between the cradles 24.
  • the cradles 24 extend to both ends of the body member 13 to permit the bars 18 and 19 to extend to the ends of the body member.
  • the bars 18 and 19, in the form shown, are slightly longer than the body member 13 and may extend outwardly beyond one end thereof.
  • Means are provided on the outwardly extending end portions 18a and 19a of bars 18 and 19 for normally holding the bars in a position such that the upper flat surfaces thereof are aligned with each other and also for permitting rolling oscillation of the bars and causing the bars to return to their normal position.
  • a rigid strap 26 extends across the end portions 18:: and 19a of the bars in engagement with the upper surfaces 20 and 21 thereof.
  • a bracket element 27 extends across bars 18 and 19 in underlying engagement with the rounded bottom surfaces 22 and 23 thereof, and in the form shown, the bracket member 27 has upstanding end portions 28 which are drilled and tapped at 29 to receive upstanding threaded posts 30 in stationary condition thereon.
  • the strap 26 has apertures 31 at its opposite ends which are slightly larger than the post 30 so as to permit vertical movement of the strap 26 along the post.
  • a pair of compression springs 32 are respectively mounted on the posts and bear against the ends of strap 26 and against the heads 33 of posts 30 for normally urging the strap 26 downwardly and causing the bars 18 and 19 to return to their normal positions.
  • the body member is applied to the bolster of the power brake.
  • the vertical position of the bolster and body member is then adjusted so as to vary the magnitude of movement of the punch between the point at which the punch first engages the stock and the point at which downward movement of the punch is terminated (this latter point is substantially constant because the ram of the power brake will have a substantially constant stroke length).
  • a piece of stock S is then laid across the body member 13 and die bars 18 and 19 and the punch 11 is thereafter moved downwardly into engagement with the stock and will cause bending of the stock and rolling of the dies 22 and 23.
  • the body member 13 is arranged on the bolster so that one end of the body member and the ends of the die bars 18 and 19 are disposed in vertical alignment with one end of the punch 11.
  • the stock S is then placed on the bars 18 and 19 with the cut C aligned with the ends of the bars and body member and the stock is positioned so that the inner terminal end of the cut C is disposed at least at the inner edges of the upper surfaces 20 and 21 of the die bars.
  • either end of the body member and die bars may be utilized for bending one portion of the sheet stock while an adjacent portion remains unbent.
  • the bracket element and strap 26 may be slipped off the end portions 18a and 19a and then the die bars 18 and 19 may be moved longitudinally in the body member 13 to the dotted position B shown in Fig. 1, after which the strap 26 and bracket element 27 may be applied in the new position A indicated in Fig. 1.
  • the end portions 18a and 19a of the die bars will then be aligned with the corresponding end of the body memher.
  • die bars 18 and 19 are readily removable from the body member by merely lifting them out.
  • a rounded punch 11' may be employed in a fashion substantially identical to the punch 11 for producing bends in a piece of stock wherein it is desired that the bend should be rounded instead of sharply angular.
  • the degree of bending is changed by merely adjusting the distance which the punch is permitted to move after the same has engaged the stock.
  • Fig. 7 shows 3 examples of specimens of stock bent to varying. degrees by merely permitting the punch 11' to be moved further downwardly between the bars 18 and 19 after the punch has engaged the stock. Again, substantially no bowing or bending of the stock occurs in the area immediately adjacent the desired point of bending.
  • a die for use with a punch for bending flat metal stock comprising a body member mounted below the punch, a pair of elongate die bars having fiat upper surfaces for supporting such metal stock, means for rotatably supporting the die bars on the body member for rotation about generally parallel axes extending longitudinally of the die bars, said die bars being disposed in side-by-sidc relationship to each other below and on opposed sides of the punch with the adjacent sides of the die bars being contiguous with each other when said surfaces are in alignment and presenting a substantially continuous planar surface normal to the movement of the punch, said body member having an unobstructed opening therein in alignment with the punch and below the adjacent sides of the die bars and extending to a greater depth than the furthest excursion of the punch therein, whereby the punch and metal stock may both be in spaced relationship to the body member when the punch is moved between the die bars in producing a bend in such metal stock.
  • said open and unobstructed area is defined by a groove in the body member and said means for rotatably supporting the diebars includes rounded bottom surfaces on each die bar and an elongate die bar-supporting cradle for each die bar, said cradles being die bar-supporting surfaces on said body member shaped to the identical rounded configuration of the bottom surfaces of the die bars.
  • a die for use with a bending punch for bending flat metal stock comprising a body member mounted below the punch, said body member having an opening therein in alignment with the punch and extending to a greater depth than the furthest excursion of the punch therein, a pair of elongate die bars having flat upper surfaces for supporting such metal stock, means for rotatably supporting the die bars on the body member for rotation of the die bars about generally parallel axes extending longitudinally thereof, said die bars being disposed in sideby-side relationship to each other below on opposite sides of the punch with the adjacent sides of the die bars contiguous with each other when the flat surfaces are in alignment and presenting a substantially continuous planar surface normal to the movement of the punch whereby the punch and metal stock may be in spaced relationship to the body member when the punch is moved between the die bars in producing a bend in such metal stock, said body member having fiat surfaces on both sides of the opening and in a common plane with the aligned surfaces of the die bars.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US713707A 1958-02-06 1958-02-06 Die for use in bending flat metal stock and the like Expired - Lifetime US2882952A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US713707A US2882952A (en) 1958-02-06 1958-02-06 Die for use in bending flat metal stock and the like
CH6834159A CH364749A (de) 1958-02-06 1959-01-15 Gesenkvorrichtung zum Biegen flacher Metallblätter
DE19591402118 DE1402118A1 (de) 1958-02-06 1959-01-24 Biegevorrichtung
BE575399A BE575399A (fr) 1958-02-06 1959-02-04 Matrice pour le pliage des tôles et matériaux analogues.
NL6408858A NL6408858A (de) 1958-02-06 1964-08-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US713707A US2882952A (en) 1958-02-06 1958-02-06 Die for use in bending flat metal stock and the like

Publications (1)

Publication Number Publication Date
US2882952A true US2882952A (en) 1959-04-21

Family

ID=24867198

Family Applications (1)

Application Number Title Priority Date Filing Date
US713707A Expired - Lifetime US2882952A (en) 1958-02-06 1958-02-06 Die for use in bending flat metal stock and the like

Country Status (5)

Country Link
US (1) US2882952A (de)
BE (1) BE575399A (de)
CH (1) CH364749A (de)
DE (1) DE1402118A1 (de)
NL (1) NL6408858A (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916073A (en) * 1958-12-29 1959-12-08 Carl Parten Die for use in bending flat metal stock and the like
US2964086A (en) * 1957-11-22 1960-12-13 Western Electric Co Crimping device
US3043545A (en) * 1959-08-10 1962-07-10 John E Lindberg Jr Fire detector installation and support bracket therefor
US3101044A (en) * 1961-05-18 1963-08-20 Rudolf H Schlidt Method of converting automobile bodies to a compact form for transport as scrap
US3124192A (en) * 1964-03-10 Bending device
US3990291A (en) * 1974-04-18 1976-11-09 Egor Evertz Bending machine for bending sheet and strip
EP0379886A1 (de) * 1989-01-18 1990-08-01 Rolf Haberstock Gesenkvorrichtung
US5060501A (en) * 1991-01-25 1991-10-29 Century Manufacturing Co. Inc. Flat metal stock bending die
US5365766A (en) * 1993-05-18 1994-11-22 Amada Engineering & Service Co., Inc. Die assembly having means for automatically controlling in the angular orientation of the lower die plate members
US5529480A (en) * 1994-10-28 1996-06-25 The Boeing Company Honeycomb core forming restricter
US6186766B1 (en) 1998-10-29 2001-02-13 The Boeing Company Apparatus for shaping honeycomb core
US20050196567A1 (en) * 2001-03-12 2005-09-08 Toyo Seikan Kaisha, Ltd. Heat-resistant resin container and method of producing the same
US7584640B1 (en) * 2008-04-28 2009-09-08 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Press brake tool
DE102011114927A1 (de) * 2011-10-06 2013-04-11 Lufthansa Technik Ag Rundbiegen von großen Blechen
CN103691814A (zh) * 2013-12-12 2014-04-02 安徽力源数控刃模具制造有限公司 一种电脑机箱折弯的专用下模具及其面模的加工方法
CN103737958A (zh) * 2013-12-28 2014-04-23 柳州力通车用空调有限公司 精密冲床工作台
CN104841776A (zh) * 2015-06-04 2015-08-19 陕西化建工程有限责任公司 用于接地母线平弯液压冷弯的液压煨弯模具
US20160121574A1 (en) * 2013-06-05 2016-05-05 Mizelda Ab Folding device, use of the same and a method for producing an information presenting device
EP3424606A1 (de) * 2017-06-28 2019-01-09 Technische Universität Dortmund Vorrichtung und verfahren zum biegen von blechartigen werkstücken bei gleichzeitiger druckspannungsüberlagerung
CN114292012A (zh) * 2020-10-07 2022-04-08 三星显示有限公司 窗模制装置及使用其的窗模制方法
CN114434781A (zh) * 2020-11-04 2022-05-06 三星显示有限公司 窗模制装置及使用窗模制装置的窗模制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8303472A (nl) * 1983-10-10 1985-05-01 Liet Cornelis Hendricus Inrichting voor het buigen van plaatmateriaal.
US5295384A (en) * 1990-03-15 1994-03-22 Lift Verkaufsgerate Gesellschaft M.B.H. Sheet-metal bending device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US295903A (en) * 1884-04-01 Machine for making hoes
GB107455A (en) * 1916-07-31 1917-07-05 John William Parker Improved Die or Block for Flanging Metal Plates, and for analogous purposes.
US1633744A (en) * 1926-01-29 1927-06-28 Hughes George Apparatus for flanging and bending metal plates
US2272740A (en) * 1939-10-16 1942-02-10 Pittsburgh Forging Co Apparatus for the manufacture of metal articles
GB690007A (en) * 1951-03-08 1953-04-08 Wellington Tube Works Ltd Method and means for manufacturing pipe elbows or bending metal tubes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US295903A (en) * 1884-04-01 Machine for making hoes
GB107455A (en) * 1916-07-31 1917-07-05 John William Parker Improved Die or Block for Flanging Metal Plates, and for analogous purposes.
US1633744A (en) * 1926-01-29 1927-06-28 Hughes George Apparatus for flanging and bending metal plates
US2272740A (en) * 1939-10-16 1942-02-10 Pittsburgh Forging Co Apparatus for the manufacture of metal articles
GB690007A (en) * 1951-03-08 1953-04-08 Wellington Tube Works Ltd Method and means for manufacturing pipe elbows or bending metal tubes

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124192A (en) * 1964-03-10 Bending device
US2964086A (en) * 1957-11-22 1960-12-13 Western Electric Co Crimping device
US2916073A (en) * 1958-12-29 1959-12-08 Carl Parten Die for use in bending flat metal stock and the like
US3043545A (en) * 1959-08-10 1962-07-10 John E Lindberg Jr Fire detector installation and support bracket therefor
US3101044A (en) * 1961-05-18 1963-08-20 Rudolf H Schlidt Method of converting automobile bodies to a compact form for transport as scrap
US3990291A (en) * 1974-04-18 1976-11-09 Egor Evertz Bending machine for bending sheet and strip
EP0379886A1 (de) * 1989-01-18 1990-08-01 Rolf Haberstock Gesenkvorrichtung
US5060501A (en) * 1991-01-25 1991-10-29 Century Manufacturing Co. Inc. Flat metal stock bending die
US5365766A (en) * 1993-05-18 1994-11-22 Amada Engineering & Service Co., Inc. Die assembly having means for automatically controlling in the angular orientation of the lower die plate members
US5529480A (en) * 1994-10-28 1996-06-25 The Boeing Company Honeycomb core forming restricter
US5824255A (en) * 1994-10-28 1998-10-20 The Boeing Company Honeycomb core forming process
US6186766B1 (en) 1998-10-29 2001-02-13 The Boeing Company Apparatus for shaping honeycomb core
US7655179B2 (en) * 2001-03-12 2010-02-02 Toyo Seikan Kaisha, Ltd. Heat-resistant resin container and method of producing the same
US20050196567A1 (en) * 2001-03-12 2005-09-08 Toyo Seikan Kaisha, Ltd. Heat-resistant resin container and method of producing the same
US7584640B1 (en) * 2008-04-28 2009-09-08 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Press brake tool
DE102011114927A1 (de) * 2011-10-06 2013-04-11 Lufthansa Technik Ag Rundbiegen von großen Blechen
US20160121574A1 (en) * 2013-06-05 2016-05-05 Mizelda Ab Folding device, use of the same and a method for producing an information presenting device
CN103691814A (zh) * 2013-12-12 2014-04-02 安徽力源数控刃模具制造有限公司 一种电脑机箱折弯的专用下模具及其面模的加工方法
CN103691814B (zh) * 2013-12-12 2016-02-03 安徽力源数控刃模具制造有限公司 一种电脑机箱折弯的专用下模具中面模的加工方法
CN103737958A (zh) * 2013-12-28 2014-04-23 柳州力通车用空调有限公司 精密冲床工作台
CN104841776A (zh) * 2015-06-04 2015-08-19 陕西化建工程有限责任公司 用于接地母线平弯液压冷弯的液压煨弯模具
EP3424606A1 (de) * 2017-06-28 2019-01-09 Technische Universität Dortmund Vorrichtung und verfahren zum biegen von blechartigen werkstücken bei gleichzeitiger druckspannungsüberlagerung
CN114292012A (zh) * 2020-10-07 2022-04-08 三星显示有限公司 窗模制装置及使用其的窗模制方法
KR20220046724A (ko) * 2020-10-07 2022-04-15 삼성디스플레이 주식회사 윈도우 성형 장치 및 이를 이용한 윈도우 성형 방법
US12252429B2 (en) * 2020-10-07 2025-03-18 Samsung Display Co., Ltd. Window molding apparatus and a window molding method using the same
CN114292012B (zh) * 2020-10-07 2026-01-13 三星显示有限公司 窗模制装置及使用其的窗模制方法
CN114434781A (zh) * 2020-11-04 2022-05-06 三星显示有限公司 窗模制装置及使用窗模制装置的窗模制方法
KR20220060582A (ko) * 2020-11-04 2022-05-12 삼성디스플레이 주식회사 윈도우 성형 장치 및 이를 이용한 윈도우 성형 방법
US12428331B2 (en) 2020-11-04 2025-09-30 Samsung Display Co., Ltd. Window molding apparatus and window molding method using the same

Also Published As

Publication number Publication date
DE1402118A1 (de) 1969-01-30
BE575399A (fr) 1959-08-04
NL6408858A (de) 1964-10-12
CH364749A (de) 1962-10-15

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