US20040250599A1 - Tubing bending machine - Google Patents
Tubing bending machine Download PDFInfo
- Publication number
- US20040250599A1 US20040250599A1 US10/461,011 US46101103A US2004250599A1 US 20040250599 A1 US20040250599 A1 US 20040250599A1 US 46101103 A US46101103 A US 46101103A US 2004250599 A1 US2004250599 A1 US 2004250599A1
- Authority
- US
- United States
- Prior art keywords
- tubing
- bending assembly
- bending
- bands
- frame
- 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.)
- Abandoned
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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
- B21D7/0225—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 using pulling members
Definitions
- This Invention relates to a device and method for bending metal tubing, particularly square or rectangular metal tubing. Bending metal tubing is desired in, for example, construction of the framework of prefabricated buildings to form curved structures, alleviating the need for preparing joints between more than one piece of tubing.
- the desired method to bend tubing in the present invention is to press the tubing in a semicircular press which not only bends the tubing, but simultaneously swages the tubing with a depression on the inside of the bend. This press is capable of introducing a bend of up to 180 degrees. By using a plurality of bending dies mounted in parallel, several pieces of tubing may be bent identically at the same time, resulting in a substantial saving of time and in uniformity of bend between the individual pieces of tubing.
- the present Invention involves a method and device for simultaneously bending multiple pieces of tubing through the use of a hydraulically actuated bending assembly which includes a plurality of bands set apart by spacing disks. Each band is accompanied by a corresponding forming die, which is mounted around the circumference of the band.
- This bending assembly is mounted beneath a hydraulic piston that is mounted in a frame vertically above the tubing to be bent.
- the tubing is inserted into the machine and is supported on each end of the desired shape by a tubing guide, which is supported by a bearing on each end and includes alignment guides to ensure that each piece of tubing is appropriately aligned with its corresponding bending die.
- the bending assembly is forced down against the tubing by the hydraulic piston, the tubing is bent by the bending assembly and is simultaneously swaged on the inside of the bend by the swaging die.
- FIG. 1 is an oblique view of the machine in its entirety.
- FIG. 2 is an end view of the machine showing pieces of tubing inserted beneath the bending assembly.
- FIG. 3 is a top view of the machine showing the bending assembly above pieces of tubing.
- FIG. 4 is a side view of the machine showing the bending assembly above pieces of tubing and showing the bearings on the tubing guides.
- FIG. 5 is a side view of the machine with the bending assembly in the depressed position.
- FIG. 6 is a cutaway view of a portion of the machine showing the position of one of the tubing guides with the bending assembly in the depressed position.
- FIG. 7 is a side view of the machine with the bending assembly retracted after being depressed.
- FIG. 8 is a cutaway view of a portion of the machine showing the position of one of the tubing guides after the bending assembly has been retracted.
- FIG. 1 is an oblique view of the preferred embodiment of the machine comprising the Invention.
- FIG. 2 is an end view of the machine, showing five pieces of tubing 12 having been inserted into the machine beneath the bending assembly 10 .
- the bending assembly 10 is shown to further comprise a series of bands 20 separated by guide discs 16 , with each band 20 held in place by a forming die 22 .
- Each forming die has two threaded ends 28 which are secured to a hydraulic cylinder 18 by means of nuts 30 .
- This entire bending assembly 10 is mounted vertically in the frame 40 with the hydraulic cylinder 18 oriented to reciprocate downwards. These details of the bending assembly 10 may also be seen in FIGS. 3, 4, 5 , and 7 .
- each tubing guide 14 is mounted to the frame 40 by means of bearings 24 which are connected to the ends of the tubing guides 14 and to a mounting bracket 42 .
- the mounting brackets 42 are connected directly to the frame 40 .
- Each tubing guide 14 has a plurality of alignment guides 26 which ensure that each piece of tubing inserted into the machine is properly aligned with the corresponding band 20 and forming die 22 .
- FIG. 2 it may be seen that there are positions for bending five pieces of tubing at one time. It is understood that by adding guide discs, bands, and forming dies, more pieces of tubing may be bent at one time, with no theoretical limit. Fewer pieces may be bent by merely not placing tubing in some of the positions. It is further understood that the preferred embodiment of the machine will have an odd number of positions so that any number of tubes from one to the maximum capacity of the machine may be bent without causing the machine to overbalance to either side.
- FIG. 5 one can see the bending assembly 10 in its depressed position as well as the pieces of tubing 12 having been bent.
- the tubing guides 14 rotate about their bearings 24 to maintain their support of the pieces of tubing 12 .
- the forming dies 22 swage a shaped groove (not depicted) on the inside radius of the bend in the pieces of tubing 12 .
- This shaped groove assists in the bending process and adds mechanical strength to the curved portion of the finished, bent pieces of tubing 12 . Without this shaped groove, the resulting bent tubing would have certain structural weaknesses that would otherwise occur.
- FIGS. 7 and 8 as the bending assembly 10 is retracted back to its initial position, the pieces of tubing 12 retain their bent shape and the tubing guides 14 become free to rotate back to their initial position.
- FIGS. 9 and 10 shows a detail of the band 20 and die 22 with the threaded ends 28 as well as the relationship of these elements in contact with a piece of tubing 12 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
A tubing bending machine comprising a bending assembly further comprising a hydraulic cylinder which reciprocates a plurality of bands set apart by guide discs, with each band being held in place by a forming die having two threaded ends which are secured to the hydraulic cylinder by means of nuts. The bending assembly is mounted vertically in a frame, on which two tubing guides are also mounted by means of bearings. The tubing guides have alignment guides corresponding to each band on the bending assembly and are oriented such that when a piece of tubing inserted in the machine is resting on the tubing guide, the piece of tubing will be aligned with a corresponding band and forming die.
Description
- Not Applicable.
- Not Applicable.
- Not Applicable.
- This Invention relates to a device and method for bending metal tubing, particularly square or rectangular metal tubing. Bending metal tubing is desired in, for example, construction of the framework of prefabricated buildings to form curved structures, alleviating the need for preparing joints between more than one piece of tubing. The desired method to bend tubing in the present invention is to press the tubing in a semicircular press which not only bends the tubing, but simultaneously swages the tubing with a depression on the inside of the bend. This press is capable of introducing a bend of up to 180 degrees. By using a plurality of bending dies mounted in parallel, several pieces of tubing may be bent identically at the same time, resulting in a substantial saving of time and in uniformity of bend between the individual pieces of tubing.
- The present Invention involves a method and device for simultaneously bending multiple pieces of tubing through the use of a hydraulically actuated bending assembly which includes a plurality of bands set apart by spacing disks. Each band is accompanied by a corresponding forming die, which is mounted around the circumference of the band. This bending assembly is mounted beneath a hydraulic piston that is mounted in a frame vertically above the tubing to be bent. The tubing is inserted into the machine and is supported on each end of the desired shape by a tubing guide, which is supported by a bearing on each end and includes alignment guides to ensure that each piece of tubing is appropriately aligned with its corresponding bending die. As the bending assembly is forced down against the tubing by the hydraulic piston, the tubing is bent by the bending assembly and is simultaneously swaged on the inside of the bend by the swaging die.
- FIG. 1 is an oblique view of the machine in its entirety.
- FIG. 2 is an end view of the machine showing pieces of tubing inserted beneath the bending assembly.
- FIG. 3 is a top view of the machine showing the bending assembly above pieces of tubing.
- FIG. 4 is a side view of the machine showing the bending assembly above pieces of tubing and showing the bearings on the tubing guides.
- FIG. 5 is a side view of the machine with the bending assembly in the depressed position.
- FIG. 6 is a cutaway view of a portion of the machine showing the position of one of the tubing guides with the bending assembly in the depressed position.
- FIG. 7 is a side view of the machine with the bending assembly retracted after being depressed.
- FIG. 8 is a cutaway view of a portion of the machine showing the position of one of the tubing guides after the bending assembly has been retracted.
- FIG. 1 is an oblique view of the preferred embodiment of the machine comprising the Invention. FIG. 2 is an end view of the machine, showing five pieces of
tubing 12 having been inserted into the machine beneath thebending assembly 10. Thebending assembly 10 is shown to further comprise a series ofbands 20 separated byguide discs 16, with eachband 20 held in place by a forming die 22. Each forming die has two threadedends 28 which are secured to ahydraulic cylinder 18 by means ofnuts 30. Thisentire bending assembly 10 is mounted vertically in theframe 40 with thehydraulic cylinder 18 oriented to reciprocate downwards. These details of thebending assembly 10 may also be seen in FIGS. 3, 4, 5, and 7. - Referring to FIGS. 1, 2, and3, there are two
tubing guides 14 mounted to theframe 40 on either end of thebending assembly 10. Eachtubing guide 14 is mounted to theframe 40 by means ofbearings 24 which are connected to the ends of thetubing guides 14 and to amounting bracket 42. Themounting brackets 42 are connected directly to theframe 40. Eachtubing guide 14 has a plurality ofalignment guides 26 which ensure that each piece of tubing inserted into the machine is properly aligned with thecorresponding band 20 and forming die 22. - Referring to FIG. 2, it may be seen that there are positions for bending five pieces of tubing at one time. It is understood that by adding guide discs, bands, and forming dies, more pieces of tubing may be bent at one time, with no theoretical limit. Fewer pieces may be bent by merely not placing tubing in some of the positions. It is further understood that the preferred embodiment of the machine will have an odd number of positions so that any number of tubes from one to the maximum capacity of the machine may be bent without causing the machine to overbalance to either side.
- Referring to FIG. 5, one can see the
bending assembly 10 in its depressed position as well as the pieces oftubing 12 having been bent. Referring to FIG. 6, as thebending assembly 10 is depressed and the pieces oftubing 12 are bent, thetubing guides 14 rotate about theirbearings 24 to maintain their support of the pieces oftubing 12. At this time, as the bending assembly is depressed, the forming dies 22 swage a shaped groove (not depicted) on the inside radius of the bend in the pieces oftubing 12. This shaped groove assists in the bending process and adds mechanical strength to the curved portion of the finished, bent pieces oftubing 12. Without this shaped groove, the resulting bent tubing would have certain structural weaknesses that would otherwise occur. Referring to FIGS. 7 and 8, as thebending assembly 10 is retracted back to its initial position, the pieces oftubing 12 retain their bent shape and thetubing guides 14 become free to rotate back to their initial position. - While the figures depict the
guide discs 16,bands 20, and formingdies 22 as having a smooth arc, it is also understood that this shape may be varied as needed to produce a particular desired shape in the bent tubing. It is emphasized that theguide discs 16 constitute a major structural element of thebending assembly 10 and that by projecting beyond thebands 20 and formingdies 22, they provide a guide to prevent thetubing 12 from twisting or otherwise becoming misshapen. FIGS. 9 and 10 shows a detail of theband 20 and die 22 with thethreaded ends 28 as well as the relationship of these elements in contact with a piece oftubing 12. - Enormous forces are necessary to bend and swage the
tubing 12. Although it has not been described in detail, persons with ordinary skill aware of the forces required understand the necessity for powerful hydraulic cylinders as well as sturdy frames and mounting brackets. Those with ordinary skill in the art will understand the making of the various parts forming the complete machine, including the mounting of thehydraulic cylinder 18 to reciprocate thebending assembly 10 and the support and foundation for mounting thetubing guides 14 to thebearings 24 and to themounting brackets 42. - Catalogue of Elements
CATALOGUE OF ELEMENTS 10 Bending Assembly 12 Tubing 14 Tubing Guide 16 Guide Discs 18 Hydraulic Cylinder 20 Bands 22 Forming Dies 24 Bearings 26 Alignment Guides 28 Threaded Ends 30 Nuts 40 Frame 42 Mounting Brackets
Claims (3)
1. A method of bending metal tubing comprising:
a. aligning a piece of tubing lengthwise with a forming die; and
b. hydraulically pressing said forming die against said tubing.
2. A tubing bending machine comprising:
a. a frame;
b. a bending assembly mounted vertically in said frame, with said bending assembly further comprising:
i. hydraulic means for reciprocating said bending assembly;
ii. a plurality of guide discs arranged parallel to each other and mounted to said hydraulic means, with a corresponding plurality of bands between said guide discs; and
iii. a plurality of forming dies equal in number to said plurality of bands, with each of said forming dies having two threaded ends, with one of said forming dies placed along the circumference of each of said bands, and with each forming die secured to said hydraulic means by a nut fastened on said threaded ends; and
b. two tubing guides mounted to said frame below and at either end of said bending assembly, with each of said tubing guides mounted to said frame by means of a bearing at either end of said tubing guides, with said bearings attached to said frame by means of a mounting bracket.
3. A bending assembly further comprising:
a. hydraulic means for reciprocating said bending assembly;
b. a plurality of guide discs arranged parallel to each other and mounted to said hydraulic means, with a corresponding plurality of bands between said guide discs; and
c. a plurality of forming dies equal in number to said plurality of bands, with each of said forming dies having two threaded ends, with one of said forming dies placed along the circumference of each of said bands, and with each forming die secured to said hydraulic means by a nut fastened on said threaded ends.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/461,011 US20040250599A1 (en) | 2003-06-13 | 2003-06-13 | Tubing bending machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/461,011 US20040250599A1 (en) | 2003-06-13 | 2003-06-13 | Tubing bending machine |
Publications (1)
Publication Number | Publication Date |
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US20040250599A1 true US20040250599A1 (en) | 2004-12-16 |
Family
ID=33511157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/461,011 Abandoned US20040250599A1 (en) | 2003-06-13 | 2003-06-13 | Tubing bending machine |
Country Status (1)
Country | Link |
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US (1) | US20040250599A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2882947A1 (en) * | 2005-03-14 | 2006-09-15 | Lexovienne De Mecanique Et Out | Bending machine with stretching action has support mounted movably on arm pivoted on turret head so it can be rotated about two orthogonal axes |
CN100391641C (en) * | 2006-03-20 | 2008-06-04 | 上海圣诺机床有限公司 | Detachable combined rear positioning structure |
USD667469S1 (en) * | 2012-04-02 | 2012-09-18 | Greenlee Textron Inc. | Portable bending table |
CN103286206A (en) * | 2013-05-08 | 2013-09-11 | 蚌埠市齐云汽配制造有限公司 | Bending die for support of automobile |
US9144835B2 (en) | 2011-03-21 | 2015-09-29 | Irwin Industrial Tool Company | Tube and pipe benders and methods of bending same |
CN105921565A (en) * | 2016-07-14 | 2016-09-07 | 沈阳飞研航空设备有限公司 | Lower mould mechanism for ultra-large intelligent vertical hydraulic cold bending machine |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3004582A (en) * | 1959-03-18 | 1961-10-17 | William R Farrington | Multiple radius pipe bending machine |
US3124192A (en) * | 1964-03-10 | Bending device | ||
US3279236A (en) * | 1965-03-12 | 1966-10-18 | Bruce J Lance | Tube bending device |
US3466919A (en) * | 1967-12-08 | 1969-09-16 | Arvin Ind Inc | Multiple radius punch for pipe bending |
US3499309A (en) * | 1967-11-20 | 1970-03-10 | Walker Mfg Co | Rotatable punch for tube bender |
US3512392A (en) * | 1968-05-01 | 1970-05-19 | Tenneco Inc | Two diameter punch for tube bender |
US3705604A (en) * | 1969-02-11 | 1972-12-12 | Faure Bertrand Ets | Device for bending metallic tubes and in bent metallic tubes |
US3990291A (en) * | 1974-04-18 | 1976-11-09 | Egor Evertz | Bending machine for bending sheet and strip |
US4328696A (en) * | 1981-02-23 | 1982-05-11 | Maremont Corporation | Method and apparatus for forming a heat shield plate |
US7047789B1 (en) * | 2005-07-13 | 2006-05-23 | Theener Ronald E | Pipe bending apparatus |
-
2003
- 2003-06-13 US US10/461,011 patent/US20040250599A1/en not_active Abandoned
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3124192A (en) * | 1964-03-10 | Bending device | ||
US3004582A (en) * | 1959-03-18 | 1961-10-17 | William R Farrington | Multiple radius pipe bending machine |
US3279236A (en) * | 1965-03-12 | 1966-10-18 | Bruce J Lance | Tube bending device |
US3499309A (en) * | 1967-11-20 | 1970-03-10 | Walker Mfg Co | Rotatable punch for tube bender |
US3466919A (en) * | 1967-12-08 | 1969-09-16 | Arvin Ind Inc | Multiple radius punch for pipe bending |
US3512392A (en) * | 1968-05-01 | 1970-05-19 | Tenneco Inc | Two diameter punch for tube bender |
US3705604A (en) * | 1969-02-11 | 1972-12-12 | Faure Bertrand Ets | Device for bending metallic tubes and in bent metallic tubes |
US3990291A (en) * | 1974-04-18 | 1976-11-09 | Egor Evertz | Bending machine for bending sheet and strip |
US4328696A (en) * | 1981-02-23 | 1982-05-11 | Maremont Corporation | Method and apparatus for forming a heat shield plate |
US7047789B1 (en) * | 2005-07-13 | 2006-05-23 | Theener Ronald E | Pipe bending apparatus |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2882947A1 (en) * | 2005-03-14 | 2006-09-15 | Lexovienne De Mecanique Et Out | Bending machine with stretching action has support mounted movably on arm pivoted on turret head so it can be rotated about two orthogonal axes |
EP1702691A1 (en) * | 2005-03-14 | 2006-09-20 | Lexovienne de Mécanique et Outillage (LMO) | Machine for bending and drawing |
CN100391641C (en) * | 2006-03-20 | 2008-06-04 | 上海圣诺机床有限公司 | Detachable combined rear positioning structure |
US9144835B2 (en) | 2011-03-21 | 2015-09-29 | Irwin Industrial Tool Company | Tube and pipe benders and methods of bending same |
USD667469S1 (en) * | 2012-04-02 | 2012-09-18 | Greenlee Textron Inc. | Portable bending table |
CN103286206A (en) * | 2013-05-08 | 2013-09-11 | 蚌埠市齐云汽配制造有限公司 | Bending die for support of automobile |
CN105921565A (en) * | 2016-07-14 | 2016-09-07 | 沈阳飞研航空设备有限公司 | Lower mould mechanism for ultra-large intelligent vertical hydraulic cold bending machine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |