EP0034549B1 - Procédé de dudgeonnage et outil susceptible d'être utilisé pour la mise en oeuvre de ce procédé - Google Patents

Procédé de dudgeonnage et outil susceptible d'être utilisé pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0034549B1
EP0034549B1 EP81420011A EP81420011A EP0034549B1 EP 0034549 B1 EP0034549 B1 EP 0034549B1 EP 81420011 A EP81420011 A EP 81420011A EP 81420011 A EP81420011 A EP 81420011A EP 0034549 B1 EP0034549 B1 EP 0034549B1
Authority
EP
European Patent Office
Prior art keywords
bore
tube
inside surface
tool
projections
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
Application number
EP81420011A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0034549A2 (fr
EP0034549A3 (en
Inventor
André Garnier
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.)
Vallourec SA
Original Assignee
Vallourec SA
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 Vallourec SA filed Critical Vallourec SA
Priority to AT81420011T priority Critical patent/ATE5129T1/de
Publication of EP0034549A2 publication Critical patent/EP0034549A2/fr
Publication of EP0034549A3 publication Critical patent/EP0034549A3/fr
Application granted granted Critical
Publication of EP0034549B1 publication Critical patent/EP0034549B1/fr
Expired 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49373—Tube joint and tube plate structure
    • Y10T29/49375—Tube joint and tube plate structure including conduit expansion or inflation

Definitions

  • Pipe expansion is a process well known in the art for attaching a tube to a support plate.
  • a bore is made in the plate and the end of the tube is engaged in this bore.
  • the outer wall of the tube is then applied by expansion against the inner surface of the bore of the plate using a dudgeon consisting of a plurality of rollers arranged around a conical pin (see US-A-1,881 867).
  • this grooving process can only be used for the expansion of thick tubes because thin tubes, for example less than 1 millimeter thick, tend to crack at the edges of the grooves. Furthermore, if the grooving improves the attachment of the tube to the plate, the sealing remains practically unchanged.
  • the present invention aims to overcome these drawbacks by providing a expansion method applicable more particularly to expansion of thin tubes which on the one hand improves sealing and on the other hand can be implemented in a simple and inexpensive manner.
  • the present invention relates to a expansion method in which at least one bore is formed in a metal plate to receive the end of a tube.
  • at least one annular projection is formed which projects beyond the interior surface of the bore; each projection has an extension measured parallel to the axis of the tube at most equal to one millimeter, and it radially exceeds the internal surface of the bore only by a small value, at most two tenths of a millimeter.
  • the annular projections are produced by the discharge of material on the interior surface of the bore.
  • This discharge can advantageously be carried out by machining similar to swaging, but carried out directly on the bore of the plate, this before placing the end of the tube in the bore.
  • the present invention also relates to a tool in the form of a dudgeon capable of being used to produce the annular projections by the discharge of metal onto the surface of the bore.
  • this tool in the form of a dudgeon, has an outer casing which has annularly hollow parts at least partially complementary to the annular projections to be formed on the internal surface of the bore, and raised parts intended to push the material of the inner surface of the bore in said recessed portions.
  • Such a dudgeon-shaped tool can for example be obtained by replacing the conventional conical rollers of a dudgeon with a plurality of balls.
  • the tool is obtained by replacing the conventional conical rollers with conical rollers which each have annular grooves of shape complementary to those of the projections to be formed on the inner surface of the bore.
  • the rollers of this tool have intermediate parts, the level of which is between that of the hollow parts and that of the raised parts, this to suddenly increase the resistive torque when said intermediate parts come into contact with the inner surface of the bore.
  • the present invention also relates to an assembly of at least one tube on a plate, this assembly being carried out by the above method.
  • Figure 1 shows a tube (1) expanded in a plate (2).
  • the thickness of the tube has been very clearly exaggerated compared to its diameter in order to make it more readable.
  • a bore (3) is first made in the plate (2) at a diameter slightly greater than the outside diameter of the tube (1).
  • Annular projections (4) are then formed by any known means, for example by discharge of material on the inner surface of the bore (3).
  • the projections (4) here have a substantially isosceles section.
  • the end of the tube (1) is then engaged in the bore (3) provided with the projections (4) where it is expanded in a conventional manner.
  • a single projection (4) may be sufficient, but several are preferably provided to take account of the fact that the extreme projections can be damaged when the tube (1) is engaged in the bore (3).
  • FIGS 2 and 4 show another embodiment of the invention.
  • Figure 2 shows a tube (11) expanded in a plate (12). Prior to the introduction of the tube (11) into the bore (13) of the plate (12), there were formed on the inner surface of the bore (13) projections (14) whose profile is shown more in detail in figure 4.
  • the projections (14) have an axial extension 1 which is of the order of 5 tenths of a millimeter or less.
  • the height e which it exceeds from the surface (15) of the bore is of the order of 3 to 5 hundredths of a millimeter.
  • the bore (13) also includes recessed areas (16) alternated with the areas (15) where the surface of the bore has not been modified.
  • the protrusions (14) are produced by the discharge of material using a tool (20) in the form of a dudgeon, comprising, like conventional dudgeons, a conical pin (21) around which are rollers of generally conical shape. (22) so that the outer casing of the rollers (22) is generally cylindrical.
  • the rollers (22) are machined to form recessed parts (23) complementary to the projections (14) and raised parts (24) liable, during the prior machining of the plate (12), in the absence of the tube (11), to push the material from the inner surface of the bore into the hollow parts (23) to form the projections (14). It can also be seen that the rollers (22) have intermediate parts (25) the level of which is between the bottom of the hollow parts (23) and the surface of the raised parts (24).
  • the raised parts (24) push the material of the plate back into the hollow parts (23) and sink into the surface of the bore until the parts (25) of intermediate levels come into contact with the surface (15) of the bore.
  • the torque of the tool (20) around its axis increases suddenly so that it is possible to adjust the machining to a determined torque with very high operating reliability.
  • FIG. 3 represents another variant in which a tube (31) is expanded in a plate (32).
  • the bore (33) was previously shaped in the absence of the tube (31), using a tool formed by replacing the rollers of a conventional dudgeon with a plurality of balls. This results in protrusions (34) separated by toric recesses (35).
  • the toric recesses (35) are alternated with areas (36) corresponding to the original surface of the bore (3).
  • the overall machining tolerances are practically the same as under the conditions of conventional expansion. It suffices to provide a minimum clearance between the tube (1) and the original bore (3) which is greater than the normal clearance of twice the thickness of the projections (4). For example, if the projections have a height e equal to 5 centimeters of millimeter, the additional clearance will have to be of a tenth of millimeter.
  • Tubes (1-11-31) of external diameter (d) of 19 mm in stainless steel and titanium and of wall thickness (E) of 0.4 and 0.5 mm as well as tubes of stainless steel of diameter outside (d) of 32 mm and thickness (E) of 0.25 mm were expanded in support plates (2) in steel, aluminum, bronze and cupro-aluminum. It only took two fine annular projections according to the invention to obtain a very good seal, this without excessive deformation of the metal.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Supports For Pipes And Cables (AREA)
  • Lubricants (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Golf Clubs (AREA)
  • Joints Allowing Movement (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Adornments (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Disintegrating Or Milling (AREA)
  • Forging (AREA)
EP81420011A 1980-02-15 1981-02-12 Procédé de dudgeonnage et outil susceptible d'être utilisé pour la mise en oeuvre de ce procédé Expired EP0034549B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81420011T ATE5129T1 (de) 1980-02-15 1981-02-12 Verfahren zum einrollen von rohren in platten und werkzeug zur durchfuehrung dieses verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8003348 1980-02-15
FR8003348A FR2475949A1 (fr) 1980-02-15 1980-02-15 Procede de dudgeonnage, dudgeon susceptible d'etre utilise pour la mise en oeuvre de ce procede, et assemblage obtenu a l'aide de ce procede

Publications (3)

Publication Number Publication Date
EP0034549A2 EP0034549A2 (fr) 1981-08-26
EP0034549A3 EP0034549A3 (en) 1981-09-02
EP0034549B1 true EP0034549B1 (fr) 1983-10-26

Family

ID=9238616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81420011A Expired EP0034549B1 (fr) 1980-02-15 1981-02-12 Procédé de dudgeonnage et outil susceptible d'être utilisé pour la mise en oeuvre de ce procédé

Country Status (10)

Country Link
US (1) US4413395A (enrdf_load_stackoverflow)
EP (1) EP0034549B1 (enrdf_load_stackoverflow)
JP (1) JPS56131026A (enrdf_load_stackoverflow)
AT (1) ATE5129T1 (enrdf_load_stackoverflow)
BR (1) BR8100857A (enrdf_load_stackoverflow)
CA (1) CA1150571A (enrdf_load_stackoverflow)
DE (1) DE3161253D1 (enrdf_load_stackoverflow)
FR (1) FR2475949A1 (enrdf_load_stackoverflow)
IN (1) IN153730B (enrdf_load_stackoverflow)
IT (1) IT1135430B (enrdf_load_stackoverflow)

Families Citing this family (132)

* Cited by examiner, † Cited by third party
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JPS5916634A (ja) * 1982-07-19 1984-01-27 Riken Corp 管状部材と環体部品の結合構造とその結合方法
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DE3716328C3 (de) * 1987-05-15 1994-07-28 Bbc Reaktor Gmbh Hohlstopfen zum Verschließen eines Wärmetauscherrohres
DE3929080C2 (de) * 1989-09-01 1996-06-27 Mak Maschinenbau Krupp Verfahren und Vorrichtung zur Behandlung der Oberflächen von reibschlüssig miteinander zu verbindenden Bauteilen
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BR8100857A (pt) 1981-08-25
EP0034549A2 (fr) 1981-08-26
ATE5129T1 (de) 1983-11-15
JPS56131026A (en) 1981-10-14
IT8119680A0 (it) 1981-02-12
IT1135430B (it) 1986-08-20
EP0034549A3 (en) 1981-09-02
DE3161253D1 (en) 1983-12-01
CA1150571A (fr) 1983-07-26
FR2475949B1 (enrdf_load_stackoverflow) 1984-03-02
US4413395A (en) 1983-11-08
FR2475949A1 (fr) 1981-08-21
IN153730B (enrdf_load_stackoverflow) 1984-08-11

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