US3705512A - Bending tool for bending deformable workpieces, such as metal sheets and the like - Google Patents

Bending tool for bending deformable workpieces, such as metal sheets and the like Download PDF

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Publication number
US3705512A
US3705512A US110099A US3705512DA US3705512A US 3705512 A US3705512 A US 3705512A US 110099 A US110099 A US 110099A US 3705512D A US3705512D A US 3705512DA US 3705512 A US3705512 A US 3705512A
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US
United States
Prior art keywords
die
workpiece
mold
counter bearing
bending
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
US110099A
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English (en)
Inventor
Karl Koschatzky
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.)
MAN AG
Original Assignee
MAN Maschinenfabrik Augsburg Nuernberg AG
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
Priority claimed from DE19702003614 external-priority patent/DE2003614C3/de
Application filed by MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical MAN Maschinenfabrik Augsburg Nuernberg AG
Application granted granted Critical
Publication of US3705512A publication Critical patent/US3705512A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/10—Stamping using yieldable or resilient pads

Definitions

  • ABSTRACT A device for bending deformable workpieces, especially metal sheets, in which in the path of movement of the male die below a holding jaw on opposite sides of said die there is provided an elastic counter bearing each respectively located in recess means adjacent the mold bottom through which extend a reciprocable piston operable both as counterpressure plate during the shaping action of said die and as an ejector at the end of said shaping action, said elastic bearing means extending into the path of movement of said die prior to its shaping operation and being elastically displaceable by said die during its shaping operation into said recess means adjacent the mold bottom.
  • the present invention relates to a tool for bending deformable workpieces such as metal sheets arrd the like, especially for making burner element boxes for core reactors. More specifically, the present invention relates to a bending tool of the above type in connection with a profile mold arranged on a machine table and with a die for pressing the workpiece into said mold, while the profile mold corresponds to the dimensions of the profile to be produced and at its folding edges has fixed jaws while the bottom of said mold has at least one opening for an ejecting tool.
  • Profile molds employed for the production of desired profiles have the shape of the profile to be produced while, as a rule, they have a depression into which the workpiece is pressed by means of a die until the desired profile shape has been obtained.
  • the workpiece is drawn around the die while the edges are formed by jaws provided on the profile mold and by the corners of the die. While with machines of this type various profile shapes can be obtained, difficulties are encountered when, for instance, profiles are to be produced which require a high precision as to their dimensions.
  • Such profiles are employed, for instance, for making element boxes for the burner rods of core reactors and, more specifically, for the manufacture of such boxes which are composed of individual profile pieces and are connected by welding.
  • FIG. 1 illustrates a cross section through a bending press with a workpiece prior to the shaping of the latter.
  • FIG. 2 is a cross section through a bending press according to FIG. 1 showing the workpiece in its deformed or shaped condition.
  • the present invention is characterized primarily in that when viewing in the direction of movement of the die, below each jaw there is provided a recess or chamber having arranged therein an elastic counter bearing, and is furthermore characterized in that the die has mantle surfaces which from its bending plane extend inwardly, and in the bending plane itself has a mantle surface corresponding to the shape to be produced. Against said last mentioned mantle surface, a piston acting as ejector and counterpressure plate is adapted to be pressed during the pressing operation of the workpiece interposed therebetween.
  • the tool according to the invention primarily comprises a profile mold l which is mounted on a machine table 2 and furthermore comprises a piston 5 which is arranged in an opening 3 provided in the bottom 4 of the profile mold, said piston 5 being movable in said opening 3.
  • the tool according to the invention furthermore comprises a die 6 adapted to be pressed into the profile mold.
  • profile mold 1 forms the stationary tool part whereas the die 6 forms the movable tool part.
  • Die 6 is arranged on a cross beam 7 by means of which said die can be moved by a pressing device 8.
  • the profile mold l which corresponds to the cross-sectional shape of the profile to be produced and which in the particular example shown is employed for producing U-shaped profiles has a cavity 9 which is confined at the lower end by the bottom 4 and the piston 5 and is laterally confined by the recesses 10.
  • the recesses 10 of the member 9 are formed by confining walls 11 and and by jaws 12 mounted thereon.
  • the jaws 12 form the upper plane of the profile mold l and are exchangeably connected to the confining walls 11 by means of screws indicated by center lines 12a.
  • the member 9 extends over the entire length of the profile body to be produced while also the elastic counter bearings 13 in the form of rubber rollers likewise extend over the entire length of the member 9, or the recesses 10 therefor.
  • the elastic counter bearings 13 have a circular cross section and have one portion of the cross section thereof, extend into the free space of the member 9.
  • the workpiece 14 which is to be deformed by means of the die 6 is likewise placed upon the jaws l2, and subsequently thereto the die 6 above the workpiece is moved against the latter.
  • the piston 5 is moved against the workpiece so that piston 5 occupies the dot-dash line position 5'.
  • Piston 5 in addition to acting as an ejector, also serves as counterpressure plate. Piston 5 and die 6 are pressed against the workpiece 14 to such an extent that the pressure of the die exceeds the pressure exerted by the piston.
  • the workpiece 16 is gradually lowered into the profile mold while piston 5 gradually recedes until after displacement of the elastic counter bearing 13 the workpiece 14 has reached the bottom 4 of the profile mold 1.
  • the upwardly extending legs l5, 16 (FIG. 2) of the U-shaped profile are pressed against the inwardly slanted mantle surfaces 17 of the die 6.
  • These inwardly pressed legs 15, 16 of the workpiece 14 may with simple workpieces during the movement of die 6 out of the workpieces be again directed outwardly while the tension inherent to said legs 15, 16 will be reduced.
  • the workpiece 14 produced in this manner is precision dimensioned without having been subjected to damage.
  • the bending edges 19 of the die 6 are, within the region of the bending plane, provided with corresponding rounded portions, and the bending edges 20 of the jaws 12 are likewise within the region of the bending plane provided with rounded portions.
  • the degree of the rounding depends on the degree of the desired cross-sectional shape, and as a rule is relatively small when the manufacture of boxes with comers is involved.
  • the die 6 For purposes of producing long profiles as, for instance, element boxes, with a length of, for instance, from 4 to 5 meters, it is advisable to produce at least the die 6 from individual parts, for instance, meter pieces which after being assembled are together post machined for purposes of obtaining a precise machining.
  • the piston 5 serving as ejector of the workpieces l4 and for pressing against the workpieces 14 may likewise, for purposes of a more precise machining, correspond to the length of the die 6. This has the advantage that when counter pressing the workpiece 14, the latter is counter pressed over its entire length so that bulges, or the like, cannot form.
  • the workpiece according to the invention serves for producing pressed profiles of approximately any desired shape without being limited to the manufacture of element boxes or the profiled parts thereof.
  • the work too] according to the invention has been discussed merely by way of example as a press for U- profiles. It is a matter of course that by means of this tool also other profile types can be produced as, for instance, those having a polygonal or arc-sectional cross section.
  • the tool according to the invention may be mounted on any desired bending machines, and also those now in use.
  • the present invention As will be seen from the above, by means of the present invention, it is possible to produce pressed profiles with high precision as to dimensions and also without damaging the walls, in a simple and relatively inexpensive manner.
  • the workpiece in most instances metal sheet, is bent about the shape of the die in a careful and precise manner.
  • the present invention due to the design of the die, brings about the advantage that the legs which during the pressing operation are bent inwardly may, prior to welding the parts together, be bent outwardly in order in this way to reduce tensions in the material. This is of a foremost importance with burner element boxes, inasmuch as restrictions in the free width of the element boxes cannot be tolerated for reasons of a bending free guidance of the burner rods.
  • a further advantage of the invention consists in the employment of elastic counter bearings because by means of said counter bearings 13 an exact bending of the workpieces around the bending edges of the die is possible.
  • the invention has the advantage that by means of the tool according to the invention, it is possible to produce also extremely long profile parts in an easy and inexpensive manner. This is of particular importance in connection with the production of profiles, which as a rule, are mass produced.
  • a device for bending deformable workpieces into accurate U-form out of flat plates, especially metal sheets which includes in combination: supporting means, mold means supported by said supporting means and having a cavity adapted to receive the workpiece while it is being deformed, a portion of said cavity being defined by a mold bottom having an opening therethrough, elastic counter bearing means supported by said bottom and arranged around that end of said bore which is adjacent said bottom, said elastic counter bearing means during bending procedure being effective upon the workpiece only in the range of workpiece bending edges, jaw means detachably connected to said mold for holding said elastic counter bearing means connected to said mold, piston means reciprocable in said bore and operable to act both as counterpressure member and as ejector, male die means arranged substantially coaxially with regard to said piston means and operable to enter said mold and to move between said elastic counter bearing means to thereby deform a workpiece placed between said die means and said mold, at least those lateral edges of said die means being rounded which during the deforming operation engage said elastic counter bearing means, said die means having inward

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
US110099A 1970-01-28 1971-01-27 Bending tool for bending deformable workpieces, such as metal sheets and the like Expired - Lifetime US3705512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702003614 DE2003614C3 (de) 1970-01-28 Biegewerkzeug

Publications (1)

Publication Number Publication Date
US3705512A true US3705512A (en) 1972-12-12

Family

ID=5760634

Family Applications (1)

Application Number Title Priority Date Filing Date
US110099A Expired - Lifetime US3705512A (en) 1970-01-28 1971-01-27 Bending tool for bending deformable workpieces, such as metal sheets and the like

Country Status (4)

Country Link
US (1) US3705512A (OSRAM)
BE (1) BE761205A (OSRAM)
FR (1) FR2077372B1 (OSRAM)
GB (1) GB1329951A (OSRAM)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295352A (en) * 1979-10-12 1981-10-20 Unlimited Steel Fabricators, Inc. Die for the formation of semi-closed channels or other complex configurations
US4373371A (en) * 1980-12-29 1983-02-15 Ford Motor Company Method of reducing springback in mechanically pressed sheet materials-I
US4377942A (en) * 1980-05-09 1983-03-29 G. Siempelkamp Gmbh & Co. Method of bending metal sheet
US4406624A (en) * 1981-08-31 1983-09-27 Dso "Pharmachim" Apparatus for producing temporary dental crowns
US5253502A (en) * 1991-12-24 1993-10-19 Alco Industries, Inc. Apparatus and method for bending and forming sheet material
US5501094A (en) * 1992-12-28 1996-03-26 Fuji Photo Film Co., Ltd. Method for bending a metal thin plate
US6052887A (en) * 1996-09-16 2000-04-25 Tower Automotive Apparatus and method for joining sheet metal layers
US6299964B1 (en) * 1998-09-01 2001-10-09 Northrop Grumman Corporation Flexible composite cure fixture
RU2176942C2 (ru) * 1999-10-18 2001-12-20 Таганрогский государственный радиотехнический университет Устройство для штамповки
CN102262028A (zh) * 2011-04-22 2011-11-30 昆明三利特科技有限责任公司 薄带回弹体的制备装置及其用途
CN104759537A (zh) * 2015-04-09 2015-07-08 哈尔滨建成集团有限公司 一种将角钢弯曲成u形的专用模具
CN105057414A (zh) * 2015-08-20 2015-11-18 江苏一机机械科技有限公司 可方便取件的液压折弯机
CN105834310A (zh) * 2016-06-17 2016-08-10 江西江铃底盘股份有限公司 一种汽车驱动桥u形减震器支架成型模具
CN106040875A (zh) * 2016-08-12 2016-10-26 江西江铃底盘股份有限公司 一种汽车驱动桥下控制杆支架整形模具
CN106270032A (zh) * 2016-11-17 2017-01-04 讯龙型材折弯（合肥）有限公司 一种u形折弯机构
CN109500253A (zh) * 2018-12-29 2019-03-22 中核北方核燃料元件有限公司 一种核燃料组件定位格架外条带冲制模具
CN116441451A (zh) * 2023-03-31 2023-07-18 中国重汽集团济南动力有限公司 一种非对称异形盒形件成形工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113385935A (zh) * 2021-06-01 2021-09-14 厦门盘横逸贸易有限公司 一种钣金弯曲加工成型方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1534698A (en) * 1922-11-03 1925-04-21 Gansert Fred Method of and apparatus for making paper-box caps
FR795359A (fr) * 1934-09-17 1936-03-12 Delle Atel Const Electr Isolateur à calotte sertie et dispositif pour réaliser ce sertissage
DE951807C (de) * 1955-04-01 1956-11-08 Heinrich Ewald Kranenberg Vorrichtung zur Herstellung von Hohlkoerpern aus Blech unter hydraulischem Druck
US3568487A (en) * 1967-07-15 1971-03-09 Smg Sueddeutsche Maschinenbau Apparatus for hydromechanical deep-drawing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258948A (en) * 1963-11-01 1966-07-05 Gen Electric Sheet metal forming apparatus
GB1203991A (en) * 1967-05-26 1970-09-03 Prec Presswork Co Ltd Improvements in or relating to the bending of sheet metal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1534698A (en) * 1922-11-03 1925-04-21 Gansert Fred Method of and apparatus for making paper-box caps
FR795359A (fr) * 1934-09-17 1936-03-12 Delle Atel Const Electr Isolateur à calotte sertie et dispositif pour réaliser ce sertissage
DE951807C (de) * 1955-04-01 1956-11-08 Heinrich Ewald Kranenberg Vorrichtung zur Herstellung von Hohlkoerpern aus Blech unter hydraulischem Druck
US3568487A (en) * 1967-07-15 1971-03-09 Smg Sueddeutsche Maschinenbau Apparatus for hydromechanical deep-drawing

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295352A (en) * 1979-10-12 1981-10-20 Unlimited Steel Fabricators, Inc. Die for the formation of semi-closed channels or other complex configurations
US4377942A (en) * 1980-05-09 1983-03-29 G. Siempelkamp Gmbh & Co. Method of bending metal sheet
US4373371A (en) * 1980-12-29 1983-02-15 Ford Motor Company Method of reducing springback in mechanically pressed sheet materials-I
US4406624A (en) * 1981-08-31 1983-09-27 Dso "Pharmachim" Apparatus for producing temporary dental crowns
US5253502A (en) * 1991-12-24 1993-10-19 Alco Industries, Inc. Apparatus and method for bending and forming sheet material
US5501094A (en) * 1992-12-28 1996-03-26 Fuji Photo Film Co., Ltd. Method for bending a metal thin plate
US6052887A (en) * 1996-09-16 2000-04-25 Tower Automotive Apparatus and method for joining sheet metal layers
US6299964B1 (en) * 1998-09-01 2001-10-09 Northrop Grumman Corporation Flexible composite cure fixture
RU2176942C2 (ru) * 1999-10-18 2001-12-20 Таганрогский государственный радиотехнический университет Устройство для штамповки
CN102262028A (zh) * 2011-04-22 2011-11-30 昆明三利特科技有限责任公司 薄带回弹体的制备装置及其用途
CN102262028B (zh) * 2011-04-22 2013-06-05 昆明三利特科技有限责任公司 薄带回弹体的制备装置及其用途
CN104759537A (zh) * 2015-04-09 2015-07-08 哈尔滨建成集团有限公司 一种将角钢弯曲成u形的专用模具
CN105057414A (zh) * 2015-08-20 2015-11-18 江苏一机机械科技有限公司 可方便取件的液压折弯机
CN105834310A (zh) * 2016-06-17 2016-08-10 江西江铃底盘股份有限公司 一种汽车驱动桥u形减震器支架成型模具
CN106040875A (zh) * 2016-08-12 2016-10-26 江西江铃底盘股份有限公司 一种汽车驱动桥下控制杆支架整形模具
CN106040875B (zh) * 2016-08-12 2018-03-06 江西江铃底盘股份有限公司 一种汽车驱动桥下控制杆支架整形模具
CN106270032A (zh) * 2016-11-17 2017-01-04 讯龙型材折弯（合肥）有限公司 一种u形折弯机构
CN109500253A (zh) * 2018-12-29 2019-03-22 中核北方核燃料元件有限公司 一种核燃料组件定位格架外条带冲制模具
CN116441451A (zh) * 2023-03-31 2023-07-18 中国重汽集团济南动力有限公司 一种非对称异形盒形件成形工艺

Also Published As

Publication number Publication date
DE2003614B2 (de) 1975-11-13
GB1329951A (en) 1973-09-12
BE761205A (fr) 1971-06-16
FR2077372A1 (OSRAM) 1971-10-22
FR2077372B1 (OSRAM) 1974-02-15
DE2003614A1 (de) 1971-08-12

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