FR2411052A1 - Radially expandable mandrel used to stress tube for welding - has body with bevelled sprung pins moved axially in oblique holes by plates drawn together by screw - Google Patents

Radially expandable mandrel used to stress tube for welding - has body with bevelled sprung pins moved axially in oblique holes by plates drawn together by screw

Info

Publication number
FR2411052A1
FR2411052A1 FR7737260A FR7737260A FR2411052A1 FR 2411052 A1 FR2411052 A1 FR 2411052A1 FR 7737260 A FR7737260 A FR 7737260A FR 7737260 A FR7737260 A FR 7737260A FR 2411052 A1 FR2411052 A1 FR 2411052A1
Authority
FR
France
Prior art keywords
welding
radially expandable
expandable mandrel
bevelled
screw
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.)
Granted
Application number
FR7737260A
Other languages
French (fr)
Other versions
FR2411052B1 (en
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.)
Leleu SA Marcel
Original Assignee
Leleu SA Marcel
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 Leleu SA Marcel filed Critical Leleu SA Marcel
Priority to FR7737260A priority Critical patent/FR2411052A1/en
Publication of FR2411052A1 publication Critical patent/FR2411052A1/en
Application granted granted Critical
Publication of FR2411052B1 publication Critical patent/FR2411052B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/40—Expansion mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
    • B23B31/1253—Jaws movement actuated by an axially movable member

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The radially expandable mandrel may be used to stress tubes in prepn. for welding and to alleviate parasitic welding stresses. A circular section core has external longitudinal ribs providing uniformly distributed points of contact with the bore of a tube, also having two or more oblique milled holes (37) contg. sliding pins (34, 41). The heads (35, 42) of the pins project beyond the axial extremity of the core (1), two external discs (23, 25) connected by an axial bolt (21, 22) converging to effect pin displacement. The pins slide axially along the holes against the action of coil springs and progressively emerge as additional radially outstanding ribs.
FR7737260A 1977-12-09 1977-12-09 Radially expandable mandrel used to stress tube for welding - has body with bevelled sprung pins moved axially in oblique holes by plates drawn together by screw Granted FR2411052A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7737260A FR2411052A1 (en) 1977-12-09 1977-12-09 Radially expandable mandrel used to stress tube for welding - has body with bevelled sprung pins moved axially in oblique holes by plates drawn together by screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7737260A FR2411052A1 (en) 1977-12-09 1977-12-09 Radially expandable mandrel used to stress tube for welding - has body with bevelled sprung pins moved axially in oblique holes by plates drawn together by screw

Publications (2)

Publication Number Publication Date
FR2411052A1 true FR2411052A1 (en) 1979-07-06
FR2411052B1 FR2411052B1 (en) 1983-08-12

Family

ID=9198694

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7737260A Granted FR2411052A1 (en) 1977-12-09 1977-12-09 Radially expandable mandrel used to stress tube for welding - has body with bevelled sprung pins moved axially in oblique holes by plates drawn together by screw

Country Status (1)

Country Link
FR (1) FR2411052A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150082606A1 (en) * 2012-03-29 2015-03-26 Mitsubishi Heavy Industries, Ltd. Tube expansion method
CN109719318A (en) * 2019-01-08 2019-05-07 合肥学院 A kind of mandrel fixture of the Quick-clamped that can change diameter based on liquid plastics

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR474658A (en) * 1914-07-04 1915-03-03 Leon Ernest Maubert Universal barrel chuck for turning lathes
US2353371A (en) * 1942-11-30 1944-07-11 Jack & Heintz Inc Chuck
FR959540A (en) * 1950-03-31
FR1035852A (en) * 1951-04-12 1953-09-01 Expandable chuck, especially for machine tools
CH404342A (en) * 1963-11-13 1965-12-15 Alder Jean Chucks for machine tools

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR959540A (en) * 1950-03-31
FR474658A (en) * 1914-07-04 1915-03-03 Leon Ernest Maubert Universal barrel chuck for turning lathes
US2353371A (en) * 1942-11-30 1944-07-11 Jack & Heintz Inc Chuck
FR1035852A (en) * 1951-04-12 1953-09-01 Expandable chuck, especially for machine tools
CH404342A (en) * 1963-11-13 1965-12-15 Alder Jean Chucks for machine tools

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150082606A1 (en) * 2012-03-29 2015-03-26 Mitsubishi Heavy Industries, Ltd. Tube expansion method
CN109719318A (en) * 2019-01-08 2019-05-07 合肥学院 A kind of mandrel fixture of the Quick-clamped that can change diameter based on liquid plastics

Also Published As

Publication number Publication date
FR2411052B1 (en) 1983-08-12

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse