EP0240022A2 - Aufweitvorrichtung für Rohrenden - Google Patents

Aufweitvorrichtung für Rohrenden Download PDF

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Publication number
EP0240022A2
EP0240022A2 EP87104897A EP87104897A EP0240022A2 EP 0240022 A2 EP0240022 A2 EP 0240022A2 EP 87104897 A EP87104897 A EP 87104897A EP 87104897 A EP87104897 A EP 87104897A EP 0240022 A2 EP0240022 A2 EP 0240022A2
Authority
EP
European Patent Office
Prior art keywords
insert body
calibration ring
expanding device
stop bolts
brought
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.)
Withdrawn
Application number
EP87104897A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0240022A3 (de
Inventor
Helmut Mechtold
Robert Dipl.-Ing. Weber (Fh)
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0240022A2 publication Critical patent/EP0240022A2/de
Publication of EP0240022A3 publication Critical patent/EP0240022A3/de
Withdrawn legal-status Critical Current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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging

Definitions

  • the invention relates to an expanding device for pipe ends with a central insert body.
  • an expanding device for pipe ends which has a central insert body and pressure pistons which are arranged on the outer circumference and can be brought into engagement with the inner circumference of the pipe to be expanded and can be synchronously adjusted.
  • These pressure stamps are designed as strips which are pressed outwards by an elastic cylindrical bellows.
  • the pressure rams mounted in the insert body are assigned a calibration ring, which determines their maximum outer circumference, on the outside of the pipe to be expanded, which serves as a stroke limiting means.
  • the pipe end can be brought to a predetermined outer diameter, whereby a round outer surface can be achieved.
  • the inner surface of the pipe end machined with the known expanding device is out of round. The consequence of this is that the inner edges of two pipe ends to be connected to one another are offset at the joints.
  • thick-walled and highly stressed pipes of larger diameter larger than 200 mm
  • a widening device is also known in which the pipe end can be widened by means of a conical pressure stamp which can be displaced axially relative to the pipe (GB-A-2 066 122).
  • the pressure stamp has three widening jaws, each covering one third of the inner circumference of the tube to be widened.
  • This device can also be used to widen thick-walled pipe ends.
  • the device is designed as a stationary machine and is not suitable for on-site installation due to its high weight and its considerable dimensions.
  • it is a peculiarity of this device that it requires considerable experience of the operating personnel in order to expand a pipe to a certain predetermined inside diameter.
  • the invention is based on the object of developing a widening device for pipe ends which produces defined inner diameters during widening and largely avoids out-of-roundness of the inner surface.
  • the expanding device should also be easy to handle. In particular, it should be able to be expanded quickly and reliably to a specific, predeterminable inner circumference. In addition, the expansion device should be manageable on site.
  • the invention is particularly suitable for use in the case of larger pipe diameters.
  • each plunger can be continuously limited by means of a wedge-shaped stop bolt, which can be adjusted transversely to its guide and axially to the insert body through a longitudinal slot in the plunger.
  • a wedge-shaped stop bolt which can be adjusted transversely to its guide and axially to the insert body through a longitudinal slot in the plunger.
  • FIG. 1 and FIG. 2 clearly show the individual pressure stamps 2 to 14 of the expanding device 15 which bear against the inner wall of the pipe to be expanded 1.
  • the central bore 16 of the insert body 17 of the expansion device 15 carrying the pressure rams can also be clearly seen here.
  • the adjusting screws 18 to 41 protrude for the stroke limitation of the individual pressure stamps.
  • the insert body 17, as can also be seen in FIG. 2, is provided on one side with an approximately 42 mm wide gap 42. This gap is shown filled in FIG. 1 and in FIG. 2 by a fitting body 43.
  • This fitting body carries a protruding connecting lug 44, with which it can be connected during axial insertion into the gap 42 via a hydraulic connector 45 to the central hydraulic line 46 running in the insert body 17 for the remaining pressure stamps.
  • This central hydraulic line can be connected to a hydraulic supply line 48 via a further hydraulic connector 47.
  • 1 shows a further supply hose 49 for a pipe centering device (not shown) located deeper in the pipe (not shown here) through the central bore 16.
  • FIGS. 2 and 3 The internal structure of the insert body 17 is best illustrated in FIGS. 2 and 3.
  • the pressure rams 2 to 14 arranged radially on the circumference of the insert body 17 can be seen, and the bores 50 to 54 of the insert body, which are stepped in the exemplary embodiment, resemble a piston are radially displaceable.
  • These plungers, which are adapted in diameter to the bores 50 to 54, have annular grooves 55 to 66, in each of which an O-ring 67 to 78 is inserted for sealing.
  • the stop bolts have a lower wedge-shaped edge 91, which has the same inclination to the axis of symmetry of the pressure stamp as the end of the longitudinal slot 84 in the pressure stamp 11 facing them.
  • the stop bolt 90 can be adjusted by means of an adjusting screw 26 depending on Screw in different lengths into the longitudinal slot 84 of the pressure stamp 11.
  • the hydraulic connector 47 for the central hydraulic line 46 is shown in section in FIG.
  • the pressure stamps 11 are not exactly radial, but are inclined out of the section plane of FIG. 2 perpendicular to the axis of symmetry 92 of the insert body by approximately 5 degrees to the tube. Because the surfaces of the pressure punches 2 to 14 facing the inner wall of the pipe end 1 to be expanded, as shown in FIG. 2, have a cylindrical curvature which has approximately the same radius as the inner radius of the pipe to be expanded, the result of this is that their pipe-inward facing, the Inner edges facing the inner tube wall expand as the tube end expands do not press into the inner pipe wall. The expansion contour achieved thus remains funnel-shaped.
  • the stop pins 85 to 90 not only limit the maximum stroke of the pressure rams, but also prevent them from rotating about their longitudinal axis. As a result, the cylindrical curvature of the outer surface of the pressure stamp remains aligned with the curvature of the inner tube wall.
  • the pressure rams can be individually limited in their stroke by moving the stop bolts 85 to 90 parallel to the axis of symmetry 92 of the insert body 17 in such a way that the desired expansion contour is achieved.
  • the hydraulic pressure or the pump resistance increases as soon as the inner wall of the longitudinal slots 79 to 84 come into contact with the stop bolts 85 to 90. This is a clear sign that the expansion process has ended.
  • the exact placement of the individual pressure stamps 2 to 14 on the inner tube wall can also be checked visually.
  • FIG. 4 shows a section of another insert body 114, as is indicated for expanding devices for particularly large pipe diameters.
  • a calibration ring 115 inside the insert body. It has sawtooth-shaped inclined surface parts 116 to 118 on its inner circumference. These parts can be brought into engagement with correspondingly inclined surface elements 119 of inward projections 120 of the individual pressure stamps 121.
  • the maximum stroke of the pressure stamp 121 and the maximum expansion size of the tube 122 determined thereby are determined according to the rotational position of the calibration ring 115 in the insert body 114. With this device, the stroke of the pressure stamp can be changed particularly quickly.
  • this insert body 114 there is also the possibility of retracting the pressure stamps 121 into their starting position after the expansion process has ended by rotating the calibration ring 115.
  • the initial setting of this calibration ring can be carried out precisely, quickly and easily if the pressure stamp 121 is pressed against a calibration ring with an appropriately selected insert ring and so on then the inner calibration ring 115 rotates until it abuts the inclined surface elements 119 of the extensions 120 and is locked in this position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Road Signs Or Road Markings (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Automatic Assembly (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Processing Of Terminals (AREA)
  • Road Paving Structures (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Electric Cable Installation (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Tubes (AREA)
  • Processing Of Meat And Fish (AREA)
  • Insulators (AREA)
EP87104897A 1984-03-05 1984-12-21 Aufweitvorrichtung für Rohrenden Withdrawn EP0240022A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3408070 1984-03-05
DE19843408070 DE3408070A1 (de) 1984-03-05 1984-03-05 Aufweitvorrichtung fuer rohrenden

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP84116152A Division EP0154030B1 (de) 1984-03-05 1984-12-21 Aufweitvorrichtung für Rohrenden
EP84116152.4 Division 1984-12-21

Publications (2)

Publication Number Publication Date
EP0240022A2 true EP0240022A2 (de) 1987-10-07
EP0240022A3 EP0240022A3 (de) 1990-02-28

Family

ID=6229627

Family Applications (2)

Application Number Title Priority Date Filing Date
EP84116152A Expired EP0154030B1 (de) 1984-03-05 1984-12-21 Aufweitvorrichtung für Rohrenden
EP87104897A Withdrawn EP0240022A3 (de) 1984-03-05 1984-12-21 Aufweitvorrichtung für Rohrenden

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP84116152A Expired EP0154030B1 (de) 1984-03-05 1984-12-21 Aufweitvorrichtung für Rohrenden

Country Status (9)

Country Link
US (1) US4667500A (ru)
EP (2) EP0154030B1 (ru)
JP (1) JPS60206543A (ru)
AT (1) ATE35921T1 (ru)
DE (2) DE3408070A1 (ru)
ES (1) ES8606034A1 (ru)
FI (1) FI844976L (ru)
NO (1) NO163476C (ru)
ZA (1) ZA851610B (ru)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI880529A7 (fi) * 1987-07-22 1989-01-23 Siemens Ag Anordning foer dragande av en roeraenda medelst kallbearbetning.
US7004685B2 (en) * 2002-02-25 2006-02-28 A-1 Concrete Leveling Inc. Mechanical device for flaring a piling member
CN112570498A (zh) * 2020-12-14 2021-03-30 无锡市宝业机械制造有限公司 多向校圆机及校圆方法
CN116929921A (zh) * 2023-06-19 2023-10-24 广船国际有限公司 一种管材扩口试验装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944435A1 (de) 1979-11-03 1981-05-14 Carl-Ludwig 5650 Solingen Pohler Kalibriermaschine fuer rohre
GB2066122A (en) 1979-12-20 1981-07-08 Vickers Ltd Sizing a tube end

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350410A (en) * 1940-11-25 1944-06-06 Porcelain Steels Inc Apparatus for truing up tubular bodies
US2654413A (en) * 1951-03-24 1953-10-06 Rohr Aircraft Corp Expansible mandrel
US2952295A (en) * 1956-12-31 1960-09-13 Yuba Cons Ind Inc Apparatus and method for belling large diameter pipe and truing the same
US2943667A (en) * 1957-10-14 1960-07-05 Arrowsmith Tool & Die Corp Expanding mandrel hydro-press
US3205691A (en) * 1959-12-15 1965-09-14 Republic Aviat Corp Method of and apparatus for fabricating hollow articles
US3220719A (en) * 1962-05-02 1965-11-30 John G Luker Expansible mandrel
GB1225775A (ru) * 1967-06-02 1971-03-24
GB1201693A (en) * 1967-09-01 1970-08-12 Kocks Wermelskirchen G M B H Apparatus for calibrating pipes
US3754720A (en) * 1969-07-16 1973-08-28 Gulf & Western Ind Prod Co Expandible mandrel assembly
US3795035A (en) * 1972-04-26 1974-03-05 Texaco Inc Mechanisms for swaging the ends of pipes
AU467272B2 (en) * 1973-02-27 1975-11-27 Tubemakers Of Australia Limited Self releasing die means to swell an end portion ofa pipe
US4007622A (en) * 1975-05-01 1977-02-15 Abram Isaevich Galperin Device for bending thin-walled pipes
DE2650691C3 (de) * 1976-11-05 1980-01-24 G. Siempelkamp Gmbh & Co, 4150 Krefeld Vorrichtung zum Außenkalibrieren von Rohren
DE2654102C2 (de) * 1976-11-29 1984-01-05 Rothenberger GmbH & Co Werkzeuge-Maschinen KG, 6000 Frankfurt Expansionskopf für Rohraufweitegeräte mit auswechselbaren Expansionsbacken
US4212186A (en) * 1978-10-25 1980-07-15 Blattler Joseph F Pipe expander
US4306134A (en) * 1979-08-01 1981-12-15 Midcon Pipeline Equipment Co. Arc welding pipe apparatus
JPS6320423Y2 (ru) * 1981-01-29 1988-06-07
JPS583735A (ja) * 1981-06-29 1983-01-10 Nippon Kokan Kk <Nkk> 管端拡管機
JPS5897413A (ja) * 1981-12-01 1983-06-09 Nippon Steel Corp Ｈ型鋼圧延ロ−ル用三層スリ−ブ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944435A1 (de) 1979-11-03 1981-05-14 Carl-Ludwig 5650 Solingen Pohler Kalibriermaschine fuer rohre
GB2066122A (en) 1979-12-20 1981-07-08 Vickers Ltd Sizing a tube end

Also Published As

Publication number Publication date
NO163476C (no) 1990-06-06
FI844976A7 (fi) 1985-09-06
NO163476B (no) 1990-02-26
FI844976L (fi) 1985-09-06
US4667500A (en) 1987-05-26
JPH0478370B2 (ru) 1992-12-11
ZA851610B (en) 1985-10-30
NO850752L (no) 1985-09-06
DE3408070A1 (de) 1985-09-05
JPS60206543A (ja) 1985-10-18
EP0240022A3 (de) 1990-02-28
ES540944A0 (es) 1986-04-16
DE3472904D1 (en) 1988-09-01
EP0154030A1 (de) 1985-09-11
EP0154030B1 (de) 1988-07-27
FI844976A0 (fi) 1984-12-17
ES8606034A1 (es) 1986-04-16
ATE35921T1 (de) 1988-08-15

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Inventor name: WEBER, ROBERT, DIPL.-ING. (FH)

Inventor name: MECHTOLD, HELMUT