US3798955A - Tube expander - Google Patents

Tube expander Download PDF

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Publication number
US3798955A
US3798955A US00286185A US28618572A US3798955A US 3798955 A US3798955 A US 3798955A US 00286185 A US00286185 A US 00286185A US 28618572 A US28618572 A US 28618572A US 3798955 A US3798955 A US 3798955A
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US
United States
Prior art keywords
segments
carrier
grooves
expander
rectangular
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
US00286185A
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English (en)
Inventor
H Wimmer
R Heimerzheim
W Feldmann
W Schauenburg
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.)
Vodafone GmbH
Original Assignee
Mannesmannroehren Werke AG
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 Mannesmannroehren Werke AG filed Critical Mannesmannroehren Werke AG
Application granted granted Critical
Publication of US3798955A publication Critical patent/US3798955A/en
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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging

Definitions

  • ABSTRACT A segmented tube expander with overhung expander segments which run on rectangular glide surfaces or carriers ona truncated pyramid; the segments are scored against lifting off the glide surfaces and are constructed to prevent contamination of a'lubricant between blide surfaces and segments.
  • the present invention relates to a tool for mechanically expanding steel pipes.
  • the purpose of the expansion is to calibrate and to gauge the cross-section of the pipes or tubes and to strengthen the material by means of cold working, as resultingfrom the expansion.
  • Mechanical tube expanding tools usually employ a conical, poly-corner bar carrying segments which engage the inner wall of the tube or pipe to be expanded. Surface portions of the segments opposite the ones engaging the tube, bear against glide faces-on the conical bar. As the bar is shifted axially, relative to the segments, the latter are spread and expand the tube or pipe in which this tool has been inserted.
  • the tube expander in accordance with the preferred embodiment of the present invention is comprised of a poly cornered body, e.g., a truncated, polyhedral pyramid, having projecting carriers of rectangular face. Expander segments ride on the carrier elements, engage the respective faces and extend down into the grooves along side of the'carriers. Holders are provided, preferably at the front and rear ends of the segments gripping around the carrier, and extend into undercut grooves so as to prevent lifting of the segments from the carriers.
  • the operating glide surfaces on the carriers are thus completely covered by the segments. As they are rectangularly shaped, they will not be contaminated by scale which may mix with the lubricant.
  • the rectangular contour of the glide surfaces is particularly advantageous for lubrication.
  • the glide surfaces together take up the pressure force when a tube is expanded.
  • the rectangular (rather than trapezoidal) contour of these surfaces do not offer maximum surface area for taking up the expansion pressure, but the increase in surface pressure per unit area is slight while the reliability is considerably increased, as compared with prior art expanders which tended to maximize available support surface for the expander elements and disregarded the lubrication problem.
  • FIG. 1 is a section through an expanderhead in accordance with the preferred embodiment of the invention.
  • FIG. 2 shows a portion of a front view of the expander head shown in FIG. 1;
  • FIG. 3 is a side elevation of the expander head.
  • an expander head is comprised of a truncated polyhedral pyramid 1, for example, a pyramid with a dodecagon as base.
  • This head may be mounted on a support rod (not shown) by means of. which the head is pushed into andthrough a pipe or tube to be expanded.
  • the generated (geometrically) surface 3 of the pyramid (altogether twelve as arranged around an axis) are glide surfaces. Grooves ll are'cut into body 1 and in between the individual surfaces 3. The grooves taper in axial direction towards the apex of the pyramid, so that the remaining portions of .pyramid surfaces 3 are actually rectangular.
  • These rectangular glide surfaces 3 are tilted relative to each other due to the polyhedral configuration of body 1 and they are incluned to the axis of the pyramid.
  • the grooves 11 are actually cut where the corners of the pyramid would be.
  • Segments S ride on glide surfaces 3 and in immediate abutment therewith and by operation of glide faces 9.
  • the outer surface 7 of each segment 15 matches the inner contour of a pipe to be expanded. Thus, this outer surface is curved andextends axially (not conically).
  • the segments 5 can glide by means of their respective surfaces or faces 9 on the glide surfaces 3 of the body 2 thereby changing the effective diameter of the outer surface.
  • the segments can be constructed from plural parts with a glider having glide face 9 running directly on the glide surface tracks 3, and -an armoring covers the glider partially and defining the operating expander surface 7.
  • Grooves 11 have undercut portions 19 so i that carriers 13 worked out of the base 1, have T- shaped construction.
  • the segments 5 have sides '15 which extend laterally down into grooves 11 and along the sides of the respective carrier 13.
  • the segments 5 are additionally provided with holders 21 and 23, bolted to the axial end faces of segments 5. These holders have noses which project into the undercut grooves .19 to prevent the segments from lifting off; they have to be axially slid onto the carriers 13.
  • the tool Upon operation, the tool is inserted as a whole into a pipe or tube to be expanded; whereby, the segments have position close to the apex end of the pyramid. Next these segments. are pushed towards the base end of the pyramid 5 so as to expand a portion ofthe tube. The segments are then retracted towards the apex, and the body 1 is moved further into the tube whereupon the segments are again shifted into tube expanding position, etc. This way, the tube or pipe is stepwise expanded.
  • the segments may be moved, e.g. through hydraulic means, or could be pushed manually, e.g. 'by means of a hammer or the like into expanding position, while being loosened from the other end of the tube.
  • the invention is not limited to the'embodiments described above but all changes and modifications towards the axis due to the pyramid configuration,
  • the segments each constructed to have an uninterrupted, rectangular glide surface for gliding on the rectangular glide surface of the respective carrier in surface-to-surface contact therewith over the entire rectangular surface of the segment for load bearing contact with entire portion of the carrier surface underneath and with lubrication in between, the segments having sides respectively extending from the glide surface of the respective segment along-side the respective carrier and into the respective adjacent tapering grooves;

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Sliding-Contact Bearings (AREA)
US00286185A 1971-09-06 1972-09-05 Tube expander Expired - Lifetime US3798955A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2145069A DE2145069C2 (de) 1971-09-06 1971-09-06 Mechanischer Rohrexpander

Publications (1)

Publication Number Publication Date
US3798955A true US3798955A (en) 1974-03-26

Family

ID=5819078

Family Applications (1)

Application Number Title Priority Date Filing Date
US00286185A Expired - Lifetime US3798955A (en) 1971-09-06 1972-09-05 Tube expander

Country Status (7)

Country Link
US (1) US3798955A (OSRAM)
JP (1) JPS5520776B2 (OSRAM)
DE (1) DE2145069C2 (OSRAM)
FR (1) FR2152675B1 (OSRAM)
GB (1) GB1401990A (OSRAM)
IT (1) IT964076B (OSRAM)
SU (1) SU520020A3 (OSRAM)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101653A (en) * 1989-11-24 1992-04-07 Mannesmann Aktiengesellschaft Mechanical pipe expander
US20040168796A1 (en) * 2003-02-28 2004-09-02 Baugh John L. Compliant swage
US20090018552A1 (en) * 2002-12-11 2009-01-15 Usgi Medical, Inc. Apparatus and methods for forming and securing gastrointestinal tissue folds
US20110000664A1 (en) * 2009-07-01 2011-01-06 Adam Mark K Non-collapsing Built in Place Adjustable Swage
US8726909B2 (en) 2006-01-27 2014-05-20 Usgi Medical, Inc. Methods and apparatus for revision of obesity procedures
CN106475478A (zh) * 2016-10-18 2017-03-08 太原重工股份有限公司 扩径机及其扩径头防护装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62113907A (ja) * 1985-11-13 1987-05-25 小松　実 ダブルナツト
CN110538933B (zh) * 2019-09-19 2020-12-01 珠海格力智能装备有限公司 一种胀管机接收座高度规格切换机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US601689A (en) * 1898-04-05 Hose-coupling reshaper
US808030A (en) * 1904-03-03 1905-12-19 John W Faessler Flue or tube expander.
US2943667A (en) * 1957-10-14 1960-07-05 Arrowsmith Tool & Die Corp Expanding mandrel hydro-press
US3583200A (en) * 1969-05-19 1971-06-08 Grotnes Machine Works Inc Expanding head and improved seal therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US601689A (en) * 1898-04-05 Hose-coupling reshaper
US808030A (en) * 1904-03-03 1905-12-19 John W Faessler Flue or tube expander.
US2943667A (en) * 1957-10-14 1960-07-05 Arrowsmith Tool & Die Corp Expanding mandrel hydro-press
US3583200A (en) * 1969-05-19 1971-06-08 Grotnes Machine Works Inc Expanding head and improved seal therefor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101653A (en) * 1989-11-24 1992-04-07 Mannesmann Aktiengesellschaft Mechanical pipe expander
US20090018552A1 (en) * 2002-12-11 2009-01-15 Usgi Medical, Inc. Apparatus and methods for forming and securing gastrointestinal tissue folds
US8216260B2 (en) 2002-12-11 2012-07-10 Usgi Medical, Inc. Apparatus and methods for forming and securing gastrointestinal tissue folds
US20040168796A1 (en) * 2003-02-28 2004-09-02 Baugh John L. Compliant swage
US7128146B2 (en) * 2003-02-28 2006-10-31 Baker Hughes Incorporated Compliant swage
US8726909B2 (en) 2006-01-27 2014-05-20 Usgi Medical, Inc. Methods and apparatus for revision of obesity procedures
US20110000664A1 (en) * 2009-07-01 2011-01-06 Adam Mark K Non-collapsing Built in Place Adjustable Swage
CN106475478A (zh) * 2016-10-18 2017-03-08 太原重工股份有限公司 扩径机及其扩径头防护装置
CN106475478B (zh) * 2016-10-18 2018-05-29 太原重工股份有限公司 扩径机及其扩径头防护装置

Also Published As

Publication number Publication date
DE2145069A1 (OSRAM) 1973-03-01
FR2152675B1 (OSRAM) 1975-01-03
FR2152675A1 (OSRAM) 1973-04-27
JPS4836062A (OSRAM) 1973-05-28
JPS5520776B2 (OSRAM) 1980-06-05
SU520020A3 (ru) 1976-06-30
GB1401990A (en) 1975-08-06
DE2145069B1 (de) 1973-03-01
IT964076B (it) 1974-01-21
DE2145069C2 (de) 1975-05-07

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