US3924433A - Stop collar for tube expander - Google Patents

Stop collar for tube expander Download PDF

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Publication number
US3924433A
US3924433A US377683A US37768373A US3924433A US 3924433 A US3924433 A US 3924433A US 377683 A US377683 A US 377683A US 37768373 A US37768373 A US 37768373A US 3924433 A US3924433 A US 3924433A
Authority
US
United States
Prior art keywords
cage
tube
tube expander
fingers
periphery
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
US377683A
Other languages
English (en)
Inventor
Paul Warren Martin
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.)
Indresco Inc
Original Assignee
Dresser Industries Inc
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 Dresser Industries Inc filed Critical Dresser Industries Inc
Priority to US377683A priority Critical patent/US3924433A/en
Priority to CA202,735A priority patent/CA1009130A/en
Priority to GB2858674A priority patent/GB1457843A/en
Priority to IT51850/74A priority patent/IT1016258B/it
Priority to NL7408911A priority patent/NL7408911A/xx
Priority to DE2433470A priority patent/DE2433470A1/de
Priority to ES428108A priority patent/ES428108A1/es
Publication of USB377683I5 publication Critical patent/USB377683I5/en
Application granted granted Critical
Publication of US3924433A publication Critical patent/US3924433A/en
Assigned to INDRESCO, INC. reassignment INDRESCO, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DRESSER INDUSTRIES, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/10—Tube expanders with rollers for expanding only

Definitions

  • the collar is comprised of a plurality of [58] Field of Search 72/ 1 individual L-shaped wire fingers circumferentially dis- 72/393, 367, 370 placed about the cage. Each finger is spring biased radially inward against the cage periphery transversely [56] References Cited to the path of tube advance.
  • Tube expanders are widely used by manufacturers of heat exchangers or the like for joining tube ends to headers and areavailable from a variety of commercial sources.
  • the roller and mandrel type tube expander is comprised of a tubular cage with three slots in its periphery containing rollers lying at an oblique angle to the cage axis.
  • a rotatable tapered mandrel extends axially through the cage in driving contact with the rollers for rotating the rollers while forcing them operably outward against a tube wall thereat.
  • the invention relates to tube expanders and more particularly to a novel stop collar for arresting axial advance of a tube end over the expander cage.
  • This is achieved with a highly effective yet relatively inexpensive construction comprised of a plurality of individual L-shaped fingers radially extending into biased engagement against the cage periphery transversely to the path of tube advance.
  • the fingers are of spring wire and are secured in a stationary position angularly displaced about the cage each terminating radially inward thereagainst.
  • the fingers are able to follow the cage and rollers in a surface tracking relation during the course of their rotation. Once the advancing tube end encounters the fingers, the lateral interference provided thereby precludes any further advancement of the tube. This eliminates the necessity of being located behind the rollers in the manner of the prior art.
  • FIG. 1 is a side elevation of a tube expander incorporating a stop collar in accordance herewith;
  • FIG. 2 is a fragmentary view similar to that of FIG. 1 and partially sectioned;
  • FIG. 3 is a sectional elevation as viewed substantially along the lines 33 of FIG. 2
  • a tube expander generally designated 10, positioned internally of a tube 11 to be expanded for secured attachment to a tube sheet or header 12.
  • a tapered mandrel 14 adapted to be rotatably driven at its end 15.
  • a cylindrical cage 16 Positioned about the mandrel to I be rotatably driven thereby is a cylindrical cage 16 containing three cylindrical forming rollers 17.
  • the forming rollers are circumferentially displaced in the cage periphery obliquely skewed to its axis and supported on the mandrel to be rotatably driven thereby.
  • Rearwardly of the rollers and likewise positioned about the cage is a thrust collar 18 enclosing a thrust bearing 19.
  • Behind the bearing is a thrust nut 22 positioned on cage threads 23 andvcoupled to cage 16 via a set screw 24.
  • An annular retainer spring 25 extending into an inward collar recess 26 maintains the components in their assembled relation whereby collar 18 will remain stationary relative to cage 16 which is free to rotate.
  • Forming thrust collar 18 is a front tubular section 30 closely surrounding cage 16 of internal diameter 32 affording a clearance 33 at least sufficient to clear the circle of maximum expansion afiorded by rollers 17.
  • integrally joined with front section 30 is an enlarged rearward tubular section 31 in which bearing 19 is contained.
  • a stop collar 35 constructed in accordance herewith.
  • stop collar 35 is a plurality of fingers 36.
  • Each of the fingers is of spring wire or the like of about A; inch diameter formed L-shaped to afford an axially elongated arm portion 37 and a radially extending leg portion 38.
  • the fingers are circumferentially displaced uniformly about the thrust collar 18 with the terminal end of each arm 37 received in a collar aperture 42 whereat the finger is secured by means of a set screw 43. From beneath a set screw 43, each finger arm extends generally in an axial direction toward rollers 17 until laterally offset by leg 38. The leg then passes radially through aperture cutouts 47 flush with the front face of collar 18 until leg end 48 terminates in engagement against the periphery of cage 16 and/or rollers 17.
  • radial leg 38 is sufficient for end 48 to engage the periphery of cage 16 while causing arm portion 37 to stand outwardly bowed from the periphery of collar tube 30. Being bowed in this manner the finger is maintained in a spring tension biased at all times inwardly against the cage. Since each finger is individually biased independently of the other each will track the alternating surfaces of rollers and cage moving therepast in their course of rotation. In that manner, the constant engagement between fingers and the rotating periphery collectively precludes any penetration of tube 11 axially beyond engagement with the fingers, even with a tube of thin wall construction.
  • the collar 35 is comprised of a plurality of resilient fingers 36 that accurately end track surface rotation of the cage 16 and forming rollers 17.
  • the fingers axially located flush with the face of tube 30 collectively effect a lateral barrier against such penetration to inwardly of the thrust collar.
  • a tube expander including a rotatable tubular cage about which to receive a tube end to be expanded, forming rollers contained in the outer periphery of said cage and a rotatable tapered mandrel within said cage for driving said cage and rollers in an expanding relation to a tube and received thereon, a substantially nonrotatable stop collar adapted for limiting axial advance of a received tube end onto said cage, said stop collar comprising a plurality of individual means disposed circumferentially about-said cage operably independent of each other, said individual means each extending into engagement with the periphery of said cage at a predetermined location in the path of tube advance, and being operably adapted to follow the rotating periphery of said cage and rollers in a surface tracking relation therewith.
  • a tube expander including a thrust collar having a plurality of apertures in which to receive and support said fingers and means to secure a finger in each of said apertures.
  • each of said fingers is comprised of an arm portion generally extending in an axial direction from one of said apertures and a leg portion generally extending in a lateral direction from said arm portion radially toward the periphery of said cage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Earth Drilling (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
US377683A 1973-07-09 1973-07-09 Stop collar for tube expander Expired - Lifetime US3924433A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US377683A US3924433A (en) 1973-07-09 1973-07-09 Stop collar for tube expander
CA202,735A CA1009130A (en) 1973-07-09 1974-06-18 Stop collar for tube expander
GB2858674A GB1457843A (en) 1973-07-09 1974-06-27 Tube expander with stop collar
IT51850/74A IT1016258B (it) 1973-07-09 1974-07-01 Collare di arresto per dilatatori per tubi
NL7408911A NL7408911A (nl) 1973-07-09 1974-07-02 Buisuitzetinrichting.
DE2433470A DE2433470A1 (de) 1973-07-09 1974-07-09 Haltemanschette fuer eine rohraufweitvorrichtung
ES428108A ES428108A1 (es) 1973-07-09 1974-07-09 Un ensanchador de tubo.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US377683A US3924433A (en) 1973-07-09 1973-07-09 Stop collar for tube expander

Publications (2)

Publication Number Publication Date
USB377683I5 USB377683I5 (de) 1975-01-28
US3924433A true US3924433A (en) 1975-12-09

Family

ID=23490121

Family Applications (1)

Application Number Title Priority Date Filing Date
US377683A Expired - Lifetime US3924433A (en) 1973-07-09 1973-07-09 Stop collar for tube expander

Country Status (7)

Country Link
US (1) US3924433A (de)
CA (1) CA1009130A (de)
DE (1) DE2433470A1 (de)
ES (1) ES428108A1 (de)
GB (1) GB1457843A (de)
IT (1) IT1016258B (de)
NL (1) NL7408911A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242893A (en) * 1979-05-22 1981-01-06 Dresser Industries, Inc. Stop collar for tube expander
US4580426A (en) * 1984-02-27 1986-04-08 Westinghouse Electric Corp. Hybrid expansion apparatus and process
WO1996011760A2 (de) * 1994-10-18 1996-04-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und werkzeuge zur herstellung von blechdurchzügen in werkstücken
US20040244451A1 (en) * 2002-03-13 2004-12-09 Johan Massee Method and forming machine for working a workpiece

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9714651D0 (en) 1997-07-12 1997-09-17 Petroline Wellsystems Ltd Downhole tubing
GB9723031D0 (en) 1997-11-01 1998-01-07 Petroline Wellsystems Ltd Downhole tubing location method
US6425444B1 (en) 1998-12-22 2002-07-30 Weatherford/Lamb, Inc. Method and apparatus for downhole sealing
CA2356194C (en) 1998-12-22 2007-02-27 Weatherford/Lamb, Inc. Procedures and equipment for profiling and jointing of pipes
GB9921557D0 (en) 1999-09-14 1999-11-17 Petroline Wellsystems Ltd Downhole apparatus
US6695063B2 (en) 1999-12-22 2004-02-24 Weatherford/Lamb, Inc. Expansion assembly for a tubular expander tool, and method of tubular expansion
US7373990B2 (en) 1999-12-22 2008-05-20 Weatherford/Lamb, Inc. Method and apparatus for expanding and separating tubulars in a wellbore
US6598678B1 (en) 1999-12-22 2003-07-29 Weatherford/Lamb, Inc. Apparatus and methods for separating and joining tubulars in a wellbore
US6698517B2 (en) 1999-12-22 2004-03-02 Weatherford/Lamb, Inc. Apparatus, methods, and applications for expanding tubulars in a wellbore
US6325148B1 (en) 1999-12-22 2001-12-04 Weatherford/Lamb, Inc. Tools and methods for use with expandable tubulars
DE60117372T2 (de) 2000-05-05 2006-10-12 Weatherford/Lamb, Inc., Houston Vorrichtung und verfahren zur herstellung einer lateralbohrung
CA2432637C (en) 2000-12-22 2007-05-29 E2Tech Limited Method and apparatus for repair operations downhole
US6510896B2 (en) 2001-05-04 2003-01-28 Weatherford/Lamb, Inc. Apparatus and methods for utilizing expandable sand screen in wellbores
GB0119977D0 (en) 2001-08-16 2001-10-10 E2 Tech Ltd Apparatus and method
US7156179B2 (en) 2001-09-07 2007-01-02 Weatherford/Lamb, Inc. Expandable tubulars
US6732806B2 (en) 2002-01-29 2004-05-11 Weatherford/Lamb, Inc. One trip expansion method and apparatus for use in a wellbore
US6668930B2 (en) 2002-03-26 2003-12-30 Weatherford/Lamb, Inc. Method for installing an expandable coiled tubing patch
US6742598B2 (en) 2002-05-29 2004-06-01 Weatherford/Lamb, Inc. Method of expanding a sand screen
US7503396B2 (en) 2006-02-15 2009-03-17 Weatherford/Lamb Method and apparatus for expanding tubulars in a wellbore

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US569651A (en) * 1896-10-20 Joseph c
US901271A (en) * 1906-05-04 1908-10-13 Otto Wiedeke Tube-expander.
DE511113C (de) * 1926-10-10 1930-10-28 Gottlob Burkhardt Dipl Ing Rohrwalze
GB536136A (en) * 1939-11-02 1941-05-05 Stirling Boiler Co Ltd Improvements in tube expanders
US2649889A (en) * 1948-03-30 1953-08-25 Frank E Dudley Tube expanding
US3426565A (en) * 1966-03-11 1969-02-11 Thomas C Wilson Inc Tube expander

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US569651A (en) * 1896-10-20 Joseph c
US901271A (en) * 1906-05-04 1908-10-13 Otto Wiedeke Tube-expander.
DE511113C (de) * 1926-10-10 1930-10-28 Gottlob Burkhardt Dipl Ing Rohrwalze
GB536136A (en) * 1939-11-02 1941-05-05 Stirling Boiler Co Ltd Improvements in tube expanders
US2649889A (en) * 1948-03-30 1953-08-25 Frank E Dudley Tube expanding
US3426565A (en) * 1966-03-11 1969-02-11 Thomas C Wilson Inc Tube expander

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242893A (en) * 1979-05-22 1981-01-06 Dresser Industries, Inc. Stop collar for tube expander
US4580426A (en) * 1984-02-27 1986-04-08 Westinghouse Electric Corp. Hybrid expansion apparatus and process
WO1996011760A2 (de) * 1994-10-18 1996-04-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und werkzeuge zur herstellung von blechdurchzügen in werkstücken
WO1996011760A3 (de) * 1994-10-18 1996-08-15 Fraunhofer Ges Forschung Verfahren und werkzeuge zur herstellung von blechdurchzügen in werkstücken
US20040244451A1 (en) * 2002-03-13 2004-12-09 Johan Massee Method and forming machine for working a workpiece
US20060123864A1 (en) * 2002-03-13 2006-06-15 Johan Massee Method and forming machine for working a workpiece
US7152445B2 (en) 2002-03-13 2006-12-26 Johan Massee Method and forming machine for working a workpiece
US7219520B2 (en) * 2002-03-13 2007-05-22 Johan Massee Method and forming machine for working a workpiece

Also Published As

Publication number Publication date
CA1009130A (en) 1977-04-26
GB1457843A (en) 1976-12-08
DE2433470A1 (de) 1975-01-30
IT1016258B (it) 1977-05-30
USB377683I5 (de) 1975-01-28
ES428108A1 (es) 1976-07-16
NL7408911A (nl) 1975-01-13

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Legal Events

Date Code Title Description
AS Assignment

Owner name: INDRESCO, INC., TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DRESSER INDUSTRIES, INC.;REEL/FRAME:006334/0060

Effective date: 19920731