US3785192A - Tube bending device - Google Patents

Tube bending device Download PDF

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Publication number
US3785192A
US3785192A US3785192DA US3785192A US 3785192 A US3785192 A US 3785192A US 3785192D A US3785192D A US 3785192DA US 3785192 A US3785192 A US 3785192A
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US
United States
Prior art keywords
tube
bending
lamellas
steering
steering element
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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English (en)
Inventor
B Fjellstrom
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Individual
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Individual
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Publication date
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Publication of US3785192A publication Critical patent/US3785192A/en
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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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only
    • 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
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • 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
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member

Definitions

  • a tube bending device for bending tubes of a circular cross-section includes a frame element and a pulley provided with a groove which is firmly attached to the frame element.
  • a steering element for steering the tube during bending has a lever arm which is connected to the steering element and the pulley via a first joint and a second joint.
  • a number of lamellas are arranged in a flexible chain configuration and are linkably but not firmly connected to each other and also provided with grooves.
  • the lammellas are connected to each other via a wire which at its one end is connected to a self-locking abutment or heel member and at its other end to a lamella holder which is pivotably connected to the steering element via a joint which is connected to a stretchable wire.
  • the invention relates to a tube bending device for bending of tubes with a circular or next to a circular cross section. Furthermore the invention relates to a tube bending device with a tube bending part or a tube bending mechanism, which is arranged to work automatically during production of complicated tube configurations.
  • the object with this invention is to provide for a tube bending device or tool, in which the abovementioned and earlier disadvantages are eliminated and in which the forming itself of a tube bend is attained through a co-operation between a pulley, which is provided with a groove, and lamellas, which also are provided with a groove and which are not firmly connected to each other but by means of a wire so that a flexible chain of lamellas is obtained, which is swingable around the periphery of the pulley during making of a tube bend.
  • the chain in its turn is steerable via rollers, which are arranged above the individual lamellas, by means of a steering element, which is brought to contact with the rollers during the bending.
  • the wire which holds the lamellas together is at its one end connected to an abutment or a heel member, which is provided for fixing or locking of the tube at a wished position before bending, and at its other end with a lamella holder, which is pivotably connected to the steering element and via a wire also to a piston, which is arranged in one at a lever arm fixed cylinder.
  • FIG. 1 shows a side elevational view of a tube bending device or tool according the invention.
  • FIG. 2 shows a cross sectional view of an individual lamella taken along line A-A in FIG. 1.
  • a frame element is denoted with 8, a pulley, which is provided with a groove, with 7 and a steering element with 4.
  • the pulley 7 and the steering element 4 are pivotably connected to each other by means of a lever 6 via joints l5 and 14.
  • a number of lamellas 2, which are provided with a groove 10, are arranged in a chain configuration and are not firmly connected to each other but via a flexible wire 3, which is arranged to run in at the lamellas provided grooves or holes.
  • the individual lamellas 2 are at their upper part provided with bearing rollers 5, which are pivotably attached to the lamellas, whereby the steering element during bending of a tube is brought into contact with the rollers for transferring of the bending force to the bend.
  • the chain or packet of lamellas is swingable around the periphery of the pulley 7 by means of a lever arm 6.
  • the wire 3 is at its one end 17 connected to an abutment or a heel member 1, which is provided for fixing or locking of the tube 12 before bending, and at its other end to a lamella holder 13, which is pivotably connected to the steering element 4 via a joint 16.
  • the frame element is provided with inclined grooves 18, in which the heel member is arranged to run.
  • the heel member 1 When stretching a wire 11 the heel member 1 will be pulled forward towards the steering element 4 and at the same time like a wedge be pressed in between the tube 12 and a wedgeshaped element 8', which is attached on the frame element 8.
  • the abutting element or the heel member 1 and the the lamellas are kept together by means of the wire 3 and form a packet or chain, which is movable in relation to the steering element 4.
  • the heel member When the: wire 3 is detached after a finished bending and the steering element 4 is moved back to its origin position the heel member will be moved backwards along the inclined grooves 18 and brought out of contact with the tube 12.
  • the stretching of the wire 3 is effected by means of one at the lever arm 6 firmly fixed cylinder 9, the piston axle of which via the wire 11 is connected to the lamella holder 13, which is pivotably attached to the steering element at the joint 16.
  • the piston axle When the piston axle is pulled in towards the cylinder the wire 11 accordingly will be stretched, whereafter the wished bend is accomplished when the lever arm 6 is pivoted around the joint 15, whereafter the packet or chair of lamellas and the steering element are brought to follow along the periphery of the pulley 7.
  • the groove 10 of the lamellas and the grove of the pulley form a non-circular channel, which preferably has a form of an ellipse or a hyperbola.
  • a non-circular channel which preferably has a form of an ellipse or a hyperbola.
  • the form of the channel formed between the pulley and the lamellas are earlier described in the U.S. patent application with the registration number 165824(the corresponding Swedish petent application has the registration number 5942/).
  • a tube bending device for bending of tubes with a circular or next to circular cross section which device comprises a frame element 8, a pulley 7, which is provided with a groove and which is firmly attached to the frame element, a steering element 4 for steering of the tube during the bending, characterized by, that a lever arm 6 is provided,which is connected to the steering element (4) and the pulley 7 via a first joint 14 and a second joint 15, that a number of lamellas 2 are arranged in a flexible chain configuration, which lamellas are linkably but not firmly connected to each other and also provided with grooves 10, whereby the lamellas are connected to each other via a wire 3, which is arranged to run in at the lamellas arranged grooves or holes, which wire 3 at its one end 17 is connected to a self-locking abutment or heel member 1 and at its other end to a lamella holder 13, which is pivotably connected to the steering element via ajoint 16 and which is connected to a stretchable wire 1
  • a tube bending device charactarized by, that the abutment or heel member 1 is arranged to run in inclined grooves, which are arranged in one at the frame element 8 attached wedgeshaped part 8, in such a way,that said heel member 1 is pressed like a wedge between the frame element 8 and the tube 12 when it is pulled towards the steering element 4, and which heel member 1 after finished bending and when the steering element 4 is moved back to its origin position again is brought out of contact with the tube.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US3785192D 1971-09-30 1972-09-28 Tube bending device Expired - Lifetime US3785192A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE12360/71A SE358100B (fr) 1971-09-30 1971-09-30

Publications (1)

Publication Number Publication Date
US3785192A true US3785192A (en) 1974-01-15

Family

ID=20295608

Family Applications (1)

Application Number Title Priority Date Filing Date
US3785192D Expired - Lifetime US3785192A (en) 1971-09-30 1972-09-28 Tube bending device

Country Status (6)

Country Link
US (1) US3785192A (fr)
JP (1) JPS527433B2 (fr)
FR (1) FR2154676B1 (fr)
GB (1) GB1377015A (fr)
IT (1) IT966066B (fr)
SE (1) SE358100B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116274534A (zh) * 2023-05-15 2023-06-23 太原市华能沃德重型机械研究所有限公司 一种安全钢管生产折弯装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5433334Y2 (fr) * 1973-07-05 1979-10-15
CN112808816A (zh) * 2021-02-06 2021-05-18 广东铭恒供应链有限公司 一种双工位铝合金拉杆箱的铝框折弯机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996100A (en) * 1957-04-08 1961-08-15 Dravo Corp Method and apparatus for bending pipe to short radh with minimum thinning of the outer wall thickness at the bend

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996100A (en) * 1957-04-08 1961-08-15 Dravo Corp Method and apparatus for bending pipe to short radh with minimum thinning of the outer wall thickness at the bend

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116274534A (zh) * 2023-05-15 2023-06-23 太原市华能沃德重型机械研究所有限公司 一种安全钢管生产折弯装置
CN116274534B (zh) * 2023-05-15 2023-07-21 太原市华能沃德重型机械研究所有限公司 一种安全钢管生产折弯装置

Also Published As

Publication number Publication date
DE2247040A1 (de) 1973-04-05
GB1377015A (en) 1974-12-11
FR2154676B1 (fr) 1978-02-10
JPS4872070A (fr) 1973-09-28
DE2247040B2 (de) 1977-06-30
JPS527433B2 (fr) 1977-03-02
IT966066B (it) 1974-02-11
FR2154676A1 (fr) 1973-05-11
SE358100B (fr) 1973-07-23

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