US3747394A - Pipe mandrel for use during bending - Google Patents
Pipe mandrel for use during bending Download PDFInfo
- Publication number
- US3747394A US3747394A US00238107A US3747394DA US3747394A US 3747394 A US3747394 A US 3747394A US 00238107 A US00238107 A US 00238107A US 3747394D A US3747394D A US 3747394DA US 3747394 A US3747394 A US 3747394A
- Authority
- US
- United States
- Prior art keywords
- mandrel
- pipe
- couplings
- shoes
- assemblies
- 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
Links
- 238000005452 bending Methods 0.000 title claims abstract description 25
- 230000000712 assembly Effects 0.000 claims abstract description 23
- 238000000429 assembly Methods 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 claims description 28
- 238000010168 coupling process Methods 0.000 claims description 28
- 238000005859 coupling reaction Methods 0.000 claims description 28
- 239000012530 fluid Substances 0.000 claims description 7
- 210000000629 knee joint Anatomy 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 241000364021 Tulsa Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Images
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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
- B21D9/03—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length and built-up from loose elements, e.g. series of balls
Definitions
- a reciprocable control common to the toggles and actuated by a single power device results in equalized forces imparted to the pipe by all of the shoe assemblies, assures complete lock-in of all of the assemblies prior to bending, and causes all of the assemblies to cooperate in preventing collapse of any one or more of the assemblies while bending takes place.
- the shoes are stragetically arranged only along those zones where buckling and wrinkling would normally occur, but at those zones the shoes are shaped, sized, spaced and adequate in number such as to accomplish optimum results.
- An important object of my present invention is to provide a pipe bending mandrel having a body which, when clamped to the pipe therewithin, is appreciably more flexible, and therefore, much more responsive to the bending imparted to the pipe than any mandrel heretofore suggested, resulting in improved bends, ease of bending and trouble-free operations.
- Another important object of the instant invention is the provision of a pipe mandrel having a highly flexible body made up of shoe assemblies which, when clamped against the pipe, are locked in place in such manner as to avoid all possibility of displacement whereby they fully resist all tendency of the pipe buckling or wrinkling at any point along the entire zone of the bend.
- a further object of the present invention is to provide a pipe mandrel which incorporates toggle joint principics in such manner as to permit rapid and simplified clamping of the shoes in place as well as release thereof and which contribute not only to obtaining the necessary characteristics of the body above mentioned but to avoidance of displacement or other failure of the shoe assemblies during the bending operation.
- a still further object of my present invention is the provision of a pipe bending mandrel which incorporates an improved control in that the knee joints of the series of toggles may be quickly and easily operated with but a single power unit through use of a common actuator for the toggles requiring minimum movement, yet capable of yielding as need be in response to bending of the pipe.
- FIG. I is a cross-sectional view through a pipe to be bent and through bending apparatus therefor, showing by side elevation a mandrel in the pipe made according to my present invention as the mandrel appears before expansion of its bendable body;
- FIG. 2 is a view similar to FIG. 1 showing the mandrel expanded
- FIG. 3 is a view similar to FIG. 2 showing the pipe and the body of the mandrel bent;
- FIG. 4 is a view showing one end of the mandrel
- FIG. 5 is a view showing the opposite end of the mandrel
- FIG. 6 is a cross-sectional view taken on line 6-6 of FIG. 2;
- FIG. 7 is a fragmentary cross-sectional view showing the details of the fluid pressure ram unit.
- FIG. 8 is a cross-sectional view taken on line 8-8 of FIG. 2.
- the mandrel shown in the drawings which is adapted for insertion into and use during bending of a pipe 10, has a pair of spaced, disc-shaped supports 12 and 14,
- Each shoe includes an arcuate segment 16 welded to a pair of spaced crescents I8 that are in turn welded to a chord 20, and a lining 22 of plastic or the like is attached to the outer convex surface of the segment 16.
- a cross plate 24 is pivotally connected to the chord 20 by a pair of spaced, upright links 26 through use of lugs 28 and 30 on chord 20 and plate 24 respectively.
- a pair of elongated, flexible, push-pull bars 32 and 34 across the plates 24, and a shim 36 between the plates 24 are joined together by bolts 38.
- One end of the bars 32 and 34 is connected by the proximal bolts 38 to a yoke 40 of a rod 42 which is in turn loosely received within a bushing 44 attached to the support 12.
- the opposite ends of the bars 32 and 34 are connected by bolts 46 to the outer end of a stem 48 of a fluid pressure piston and cylinder unit 50 carried by the support 14.
- the stem 48 is secured to a piston 52 of the unit 50 which is in turn reciprocable within a cylinder 54 of the unit 50.
- Certain of the lugs 28 are pivotally interconnected in pairs by horizontal links 56. Additional horizontal links 58 pivotally connect the support 12 with proximal lugs 28 and, in the same manner, the support 14 is pivotally connected with proximal lugs 28 by links 60.
- Framework 62 on the support 12 is provided with a pair of rollers 64 and a drive wheel 66 which engage the inner face of the pipe 10.
- the wheel 66 is driven by a prime mover 68 operably coupled with the wheel 66 by a chain and sprocket wheel assembly 70.
- a mount 72 for the prime mover 68 and the wheel is swingable on the framework 62 and a pair of fluid pressure piston and cylinder assemblies 74 on the framework 62 connect with the mount 72 to move the wheel 66 into and out of engagement with'the pipe 10.
- Framework 76 on the support 12 is provided with rollers 78 comparable to the rollers 64.
- Pipe bending machines are normally provided with transversely concave members 80 and 82, the latter of which is longitudinally convex.
- the links 26 present a toggle for each shoe assembly respectively, it being understood that each such assembly includes an upper and a corresponding lower shoe pivotally connected with their associated toggle.
- the links 26 form opposed couplings for each shoe assembly respectively with the couplings connected in end-to-end relationship, presenting a series of knee joints at the bars 32 and 34.
- the arrangement of the toggles is such that each pair of couplings or links 26 is therefore normally out of alignment as shown in FIG. 1.
- the links 26 impart endwise thrusts to the shoes radially outwardly in opposite directions to clamp the linings 22 with substantially equal pressure against the inner face of the pipe along the entire length of the flexible body.
- the toggle arrangements are now straightened out with the upper series of links 26 in end-to-end alignment with the corresponding links 26 of the lower series thereof.
- the pipe 10 is now bent into conformity with the longitudinal convexity of the member 82 as illustrated in FIG. 3.
- the lower series of shoes remains clamped against the lower, longitudinal, concave bend in the pipe 10 and the upper series of shoes remains clamped against the upper, longitudinal convex bend in the pipe 10.
- This desired result is made possible by virtue of the flexible nature of the bars 32 and 34 which are free to bend down as the supports 12 and 14 are free to tilt and as the rod 42 is free to shift longitudinally and/or tilt in the bushing 44 because of the structures (link connections 58 and 60) which pivotally connect the supports 12 and 14 with the next adjacent or end shoe assemblies.
- the bend in the pipe 10 remains smooth and unwrinkled not only along the upper convex portion of the bend but along the lower concave portion of the bend.
- the circumferential lengths of the segments 16 need not be identical along the top and bottom, as shown in FIG. 6, and such lengths may be varied as conditions warrant. But there is no need for shoes along the sides of the mandrel because the sides of the pipe 10 tend to bulge out during bending without any evidence of wrinkling. Thus, the upper series of shoes is circumferentially spaced in both directions from the lower series of shoes. As a result, only about one fourth of the circumference of the pipe 10 need to be engaged by each of the lower and upper shoes.
- a mandrel adapted for insertion into and use during bending of a pipe comprising:
- each assembly including:
- each toggle having an arrangement which includes a pair of opposed couplings connected together in end-to-end relationship, presenting a knee joint, each pair of couplings being normally out of alignment so that when a force is applied in one direction to said joint thereof to straighten the arrangement said shoes will receive endwise thrusts from the couplings radially outwardly in opposite directions to clamp said surfaces of the shoes with substantially equal pressure against the inner face of the pipe throughout the length of the body; and an elongated, flexible, push-pull device at said joints and common thereto,
- each support being provided with structure pivotally connecting the same with the couplings of the assembly next adjacent thereto.
- each coupling including a pair of spaced links having plates at opposite ends thereof secured to said device and to corresponding shoes respectively.
- each plate being provided with a pair of lugs, each lug being pivotallyattached to a corresponding link.
- each coupling having a plate pivotally attached thereto, said device including a pair of bars crossing the plates and joined thereto.
- each series of said assemblies is coextensive in length with said body and one of said series is circumferentially spaced from the other of said series throughout the length of the body at both ends of all shoes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Claims (16)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US23810772A | 1972-03-27 | 1972-03-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3747394A true US3747394A (en) | 1973-07-24 |
Family
ID=22896536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00238107A Expired - Lifetime US3747394A (en) | 1972-03-27 | 1972-03-27 | Pipe mandrel for use during bending |
Country Status (2)
Country | Link |
---|---|
US (1) | US3747394A (en) |
CA (1) | CA982920A (en) |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3851519A (en) * | 1972-06-06 | 1974-12-03 | Crc Crose Int Inc | Internal pipe supporting mandrel |
US3964290A (en) * | 1974-12-20 | 1976-06-22 | Auxer Marvin L | Internal pipe bending mandrel |
US4086803A (en) * | 1976-06-25 | 1978-05-02 | Crc-Crose International, Inc. | Pipe bending mandrel |
US4088007A (en) * | 1977-01-24 | 1978-05-09 | Midcon Pipeline Equipment Co. | Pipe bending mandrel |
US4313330A (en) * | 1980-03-10 | 1982-02-02 | Cummings James D | Pipe bending apparatus |
US4352285A (en) * | 1979-09-06 | 1982-10-05 | Crutcher Resources Corporation | Hydraulic wedge mandrel |
US4914939A (en) * | 1988-06-03 | 1990-04-10 | Contech Construction Products, Inc. | Self propelled internal pipe arching apparatus |
US5327765A (en) * | 1993-04-05 | 1994-07-12 | Aluminum Company Of America | Internal articulated mandrel for the stretch forming of elongated hollow metal sections |
US6000260A (en) * | 1998-04-06 | 1999-12-14 | Miller S. Price | Spiral duct ovalizer |
US6009737A (en) * | 1997-07-17 | 2000-01-04 | Arvin Industries, Inc. | Tube bender |
US6155091A (en) * | 1999-02-26 | 2000-12-05 | Arvin Industries, Inc. | Mandrel assembly for tube-bending apparatus |
US6389872B1 (en) | 2000-08-31 | 2002-05-21 | Crc-Evans Pipeline International, Inc. | Mandrel apparatus with floating spring members |
US20080163666A1 (en) * | 2007-01-10 | 2008-07-10 | Gm Global Technology Operations, Inc. | Mandrel anchor for tube bending |
US20110176904A1 (en) * | 2010-01-18 | 2011-07-21 | Henrik Stiesdal | Method of transportation for wind turbine tower |
US20120192612A1 (en) * | 2010-01-15 | 2012-08-02 | Aws Schaefer Technologie Gmbh | Pipe manipulator |
CN103495630A (en) * | 2013-09-29 | 2014-01-08 | 上海电机学院 | Cold bend forming device for main pipeline of nuclear power station device and core module |
US8647247B2 (en) | 2010-05-13 | 2014-02-11 | Douglas Machine Inc. | Continuous motion case former |
CN106270057A (en) * | 2016-08-29 | 2017-01-04 | 沈阳飞研航空设备有限公司 | The pre-walking mechanism of oil cylinder internally-arranged type super large voussoir inner tube of a tyre core |
CN106270056A (en) * | 2016-08-29 | 2017-01-04 | 沈阳飞研航空设备有限公司 | The rising mechanism of oil cylinder internally-arranged type super large voussoir inner tube of a tyre core |
CN106270055A (en) * | 2016-08-29 | 2017-01-04 | 沈阳飞研航空设备有限公司 | The parallel moving mechanism of oil cylinder internally-arranged type super large voussoir inner tube of a tyre core |
CN106311837A (en) * | 2016-08-29 | 2017-01-11 | 沈阳飞研航空设备有限公司 | Oversized wedge block inner tube core with built-in oil cylinder |
CN110560530A (en) * | 2019-10-12 | 2019-12-13 | 合肥工业大学 | Variable-diameter crease-resistant core rod for bent pipe |
CN112007977A (en) * | 2019-05-31 | 2020-12-01 | 杭州三花微通道换热器有限公司 | Device for bending heat exchanger and bending method of heat exchanger |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2734120A (en) * | 1956-02-07 | sensenig | ||
US2916076A (en) * | 1956-12-21 | 1959-12-08 | Young & Greenwalt Co | Apparatus for fabricating arch-type culverts |
US3043361A (en) * | 1959-02-24 | 1962-07-10 | Clarence L Kelso | Pipe wall supporting mechanism |
US3109477A (en) * | 1962-09-25 | 1963-11-05 | Crose United Corp | Mandrel for pipe bending machines |
-
1972
- 1972-03-27 US US00238107A patent/US3747394A/en not_active Expired - Lifetime
-
1973
- 1973-03-21 CA CA166,631A patent/CA982920A/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2734120A (en) * | 1956-02-07 | sensenig | ||
US2916076A (en) * | 1956-12-21 | 1959-12-08 | Young & Greenwalt Co | Apparatus for fabricating arch-type culverts |
US3043361A (en) * | 1959-02-24 | 1962-07-10 | Clarence L Kelso | Pipe wall supporting mechanism |
US3109477A (en) * | 1962-09-25 | 1963-11-05 | Crose United Corp | Mandrel for pipe bending machines |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3851519A (en) * | 1972-06-06 | 1974-12-03 | Crc Crose Int Inc | Internal pipe supporting mandrel |
US3964290A (en) * | 1974-12-20 | 1976-06-22 | Auxer Marvin L | Internal pipe bending mandrel |
US4086803A (en) * | 1976-06-25 | 1978-05-02 | Crc-Crose International, Inc. | Pipe bending mandrel |
US4088007A (en) * | 1977-01-24 | 1978-05-09 | Midcon Pipeline Equipment Co. | Pipe bending mandrel |
US4352285A (en) * | 1979-09-06 | 1982-10-05 | Crutcher Resources Corporation | Hydraulic wedge mandrel |
US4313330A (en) * | 1980-03-10 | 1982-02-02 | Cummings James D | Pipe bending apparatus |
US4914939A (en) * | 1988-06-03 | 1990-04-10 | Contech Construction Products, Inc. | Self propelled internal pipe arching apparatus |
US5327765A (en) * | 1993-04-05 | 1994-07-12 | Aluminum Company Of America | Internal articulated mandrel for the stretch forming of elongated hollow metal sections |
WO1994022610A1 (en) * | 1993-04-05 | 1994-10-13 | Aluminum Company Of America | Internal articulated mandrel for the stretch forming of elongated hollow metal sections |
US6009737A (en) * | 1997-07-17 | 2000-01-04 | Arvin Industries, Inc. | Tube bender |
US6000260A (en) * | 1998-04-06 | 1999-12-14 | Miller S. Price | Spiral duct ovalizer |
US6155091A (en) * | 1999-02-26 | 2000-12-05 | Arvin Industries, Inc. | Mandrel assembly for tube-bending apparatus |
US6389872B1 (en) | 2000-08-31 | 2002-05-21 | Crc-Evans Pipeline International, Inc. | Mandrel apparatus with floating spring members |
US7404310B1 (en) * | 2007-01-10 | 2008-07-29 | Gm Global Technology Operations, Inc. | Mandrel anchor for tube bending |
US20080163666A1 (en) * | 2007-01-10 | 2008-07-10 | Gm Global Technology Operations, Inc. | Mandrel anchor for tube bending |
US9399247B2 (en) * | 2010-01-15 | 2016-07-26 | Aws Schaefer Technologie Gmbh | Pipe manipulator |
US20120192612A1 (en) * | 2010-01-15 | 2012-08-02 | Aws Schaefer Technologie Gmbh | Pipe manipulator |
US20110176904A1 (en) * | 2010-01-18 | 2011-07-21 | Henrik Stiesdal | Method of transportation for wind turbine tower |
US8647247B2 (en) | 2010-05-13 | 2014-02-11 | Douglas Machine Inc. | Continuous motion case former |
CN103495630A (en) * | 2013-09-29 | 2014-01-08 | 上海电机学院 | Cold bend forming device for main pipeline of nuclear power station device and core module |
CN103495630B (en) * | 2013-09-29 | 2015-07-08 | 上海电机学院 | Cold bend forming device for main pipeline of nuclear power station device and core module |
CN106270057A (en) * | 2016-08-29 | 2017-01-04 | 沈阳飞研航空设备有限公司 | The pre-walking mechanism of oil cylinder internally-arranged type super large voussoir inner tube of a tyre core |
CN106270056A (en) * | 2016-08-29 | 2017-01-04 | 沈阳飞研航空设备有限公司 | The rising mechanism of oil cylinder internally-arranged type super large voussoir inner tube of a tyre core |
CN106270055A (en) * | 2016-08-29 | 2017-01-04 | 沈阳飞研航空设备有限公司 | The parallel moving mechanism of oil cylinder internally-arranged type super large voussoir inner tube of a tyre core |
CN106311837A (en) * | 2016-08-29 | 2017-01-11 | 沈阳飞研航空设备有限公司 | Oversized wedge block inner tube core with built-in oil cylinder |
CN112007977A (en) * | 2019-05-31 | 2020-12-01 | 杭州三花微通道换热器有限公司 | Device for bending heat exchanger and bending method of heat exchanger |
CN112007977B (en) * | 2019-05-31 | 2022-03-25 | 杭州三花微通道换热器有限公司 | Device for bending heat exchanger and bending method of heat exchanger |
CN110560530A (en) * | 2019-10-12 | 2019-12-13 | 合肥工业大学 | Variable-diameter crease-resistant core rod for bent pipe |
CN110560530B (en) * | 2019-10-12 | 2020-12-22 | 合肥工业大学 | Variable-diameter crease-resistant core rod for bent pipe |
Also Published As
Publication number | Publication date |
---|---|
CA982920A (en) | 1976-02-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3747394A (en) | Pipe mandrel for use during bending | |
US3109477A (en) | Mandrel for pipe bending machines | |
US4313330A (en) | Pipe bending apparatus | |
US3834210A (en) | Pipe bending system | |
US4487052A (en) | Device and method for removing irregularities in or enlarging an underground duct | |
US4608739A (en) | Connector of and sealing of tubular members | |
US4420866A (en) | Apparatus and process for selectively expanding to join one tube into another tube | |
US4320568A (en) | Method of expanding tubular members | |
US3105537A (en) | Bending pipe | |
US3835520A (en) | Tube pulling apparatus | |
US3851519A (en) | Internal pipe supporting mandrel | |
US1976797A (en) | Pipe coupling and a method of producing the same | |
KR20080034880A (en) | Device for centering and clamping tubular parts | |
US2818636A (en) | Method of manufacturing reinforced flexible conduit | |
US6240965B1 (en) | Apparatus for repair of high temperature and pressure conduits, method for repairing high temperature and pressure conduits, and a sealing device for repairing high temperature and pressure conduits | |
CA2332782A1 (en) | Internal pipe clamp | |
US4430024A (en) | Hydraulically operated mandrels | |
US3877282A (en) | Swaging tool for joining two telescopic pipe ends | |
US4657436A (en) | Device and method for removing irregularities in or enlarging an underground duct | |
US3180130A (en) | Mandrel for preventing wrinkling of pipes during bending thereof | |
US4082248A (en) | Pipe driving apparatus | |
US2699959A (en) | Bellows type expansion joint for tubular conduits | |
US3910098A (en) | Mandrel for shaping pipes | |
US4389763A (en) | Apparatus for joining pipe sections by jacking | |
US3274817A (en) | Internal pipe bender |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CRC PIPELINE INTERNATIONAL, INC., 50 BRIAR HOLLOW Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EVANS PIPELINE EQUIPMENT COMPANY A CORP OF OK;REEL/FRAME:004455/0863 Effective date: 19850731 |
|
AS | Assignment |
Owner name: CRC-EVANS PIPELINE INTERNATIONAL, INC., A CORP. OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CRC-EVANS PIPELINE INTERNATIONAL, INC.;REEL/FRAME:005003/0669 Effective date: 19880705 |
|
AS | Assignment |
Owner name: WELLS FARGO BANK, N.A., A NATIONAL BANKING ASSOCIA Free format text: SECURITY INTEREST;ASSIGNOR:ENTERRA CORPORATION;REEL/FRAME:005012/0795 Effective date: 19880324 Owner name: WELLS FARGO BANK, N.A., A NATIONAL BANKING ASSOC. Free format text: SECURITY INTEREST;ASSIGNOR:CRC-EVANS PIPELINE INTERNATIONAL, INC.;REEL/FRAME:005010/0529 Effective date: 19880324 Owner name: ENTERRA CORPORATION, TEXAS Free format text: SECURITY INTEREST;ASSIGNOR:CONNECT CORPORATION, A DE CORP. (WHICH UPON ITS MERGER WITH CRC-EVANS PIPELINE INTERNATIONAL, INC., A TX CORP., SHALL CHANGE ITS NAME TO CRC -EVANS PIPELINE INTERNATIONAL, INC., A DE CORP.);REEL/FRAME:005041/0151 Effective date: 19880324 |