EP0737114A1 - Einschnürungsverfahren - Google Patents

Einschnürungsverfahren

Info

Publication number
EP0737114A1
EP0737114A1 EP95939312A EP95939312A EP0737114A1 EP 0737114 A1 EP0737114 A1 EP 0737114A1 EP 95939312 A EP95939312 A EP 95939312A EP 95939312 A EP95939312 A EP 95939312A EP 0737114 A1 EP0737114 A1 EP 0737114A1
Authority
EP
European Patent Office
Prior art keywords
ring
pipe
cavity
matrix
shrinking
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
EP95939312A
Other languages
English (en)
French (fr)
Other versions
EP0737114B1 (de
Inventor
Richard Chene
Pascal Detable
Michel Andre
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.)
Caillau SAS
Original Assignee
Etablissements Caillau SAS
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 Etablissements Caillau SAS filed Critical Etablissements Caillau SAS
Publication of EP0737114A1 publication Critical patent/EP0737114A1/de
Application granted granted Critical
Publication of EP0737114B1 publication Critical patent/EP0737114B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • 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
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/046—Connecting tubes to tube-like fittings

Definitions

  • the present invention relates, in general, to a method for shrinking a ring fitted on the free end of a flexible pipe fitted on a rigid tubular element, said ring having at least one portion called "to shrink” whose diameter is greater to that of the pipe.
  • the method implements a constriction matrix provided with an axial cavity comprising a flared section widening between a first and a second end, the cavity having a wide open end at which the diameter of said cavity is substantially equal to diameter of said flared section at the second end of the latter.
  • Axial necking is commonly used for custom work of rigid tubes.
  • the patent issued in the UNITED STATES under number 2314002 describes a method which attempts to use axial constriction to constrict a ring fitted on the free end of a flexible pipe.
  • the necking die is first of all placed around the pipe and is then moved, on the ring, towards the free end of the pipe.
  • the smallest diameter of the axial cavity is at least equal to the outside diameter of the pipe.
  • the ring itself being arranged around the pipe its internal diameter is also at least equal to the external diameter of the pipe. Consequently, the effective reduction in diameter during the constriction is at most equal to the thickness of the ring.
  • the reduction in diameter may not be sufficient to ensure the reliability of the holding of the pipe, ring, tubular element assembly.
  • the only way to increase the amplitude of the necking, that is to say to make the reduction in diameter greater, is to increasing the thickness of the ring, which inevitably leads to an increase in the material cost and to an increase in the required shrinking power.
  • the constriction is not limited to the thickness of the ring.
  • the fact of moving backwards significantly improves the mechanical strength of the pipe, ring, tubular element assembly due to the behavior of the pipe material, which generally comprises rubber, during the shrinking operation.
  • the volume of the excess material that is to say the volume of the material that the creep tends locally to repel
  • the pressure of the material constituting the pipe inside the ring undergoes very significant local variations.
  • the thickness of the ring must be relatively large.
  • the material constituting this pipe is subjected both to creep and to an intense pressure variation, which affects its mechanical qualities.
  • the necking is therefore carried out in a manner that is both homogeneous and progressive, so that the assembly of the ring and the pipe is solid and reliable, the latter having no bead or any accumulation of material at its end clamped between the ring and the rigid tubular element and no zone of weakness in particular in the region of the end of the ring remote from the free end of the pipe.
  • the connection is ensured reliably even with rings whose thickness is relatively small.
  • the relative axial movement of the ring and the necked die is stopped before the first end of the flared section reaches the end of the portion to be shrunk most distant from the free end of the pipe.
  • the rear portion of the ring can be slightly flared and does not risk injuring the pipe.
  • they are subjected to endurance tests. more and more severe.
  • One of these tests is to oscillate the pipe relative to the ring.
  • the fact that the rear portion of the ring is flared makes it possible to prevent the pipe from being damaged, or even cut, during such a test.
  • FIG. 1 is a longitudinal section showing a ring fitted on the free end of a flexible pipe, itself fitted on a rigid tubular element, as well as a shrinking matrix, using which prepares to implement the method according to a first embodiment.
  • FIG. 4 is a view similar to that of Figure 1, on which we are about to implement the method according to an alternative embodiment
  • FIG. 1 shows a flexible pipe 10, the free end 10a of which is fitted onto a rigid tubular element 12, while a ring 14, of cylindrical shape, is fitted onto the free end 10a.
  • end 10a is the front end of the flexible pipe 10.
  • the ring 14 is shown before it is shrunk, and its diameter D is greater than that of the pipe 10.
  • a constriction matrix 16 provided with an axial cavity 18.
  • This cavity comprises a flared section l ⁇ a which widens between a first end 19a of diameter d 'and a second end 19b of diameter d .
  • the diameter d is greater than the diameter D, itself greater than the diameter of.
  • the cavity On the side of the first end 19a of the flared section, the cavity has a cylindrical section 18b of diameter d 'which opens onto a narrow open end 17.
  • the cavity has a wide open end which, in the example shown, coincides with the second end 19b of the flared section, which is frustoconical.
  • Figure 1 shows these various elements just before the start of the necking process, in a position in which the axis of the cavity is aligned with the longitudinal axis A of the flexible pipe and the wide open end 20 is directed towards the 'back.
  • This tool is only shown diagrammatically in FIG. 1. It can comprise two jaws which are placed around the pipe so as to cooperate with the rear end 14b of the ring 14 to maintain the latter during the constriction.
  • the necking die is placed so that at least the wide end 20 of the cavity is around the ring to be shrunk, while the first end 19a is towards the front, beyond the front end of the pipe.
  • the matrix is moved relative to the neck ring in the direction of arrow F, that is to say in the direction from the front end 10a of the pipe to its rear end, less until the end 20 of the cavity is at the front end 14a of the ring.
  • the actual constriction begins when the wall of the cavity begins to cooperate with the outer periphery of the ring.
  • the necking matrix 16 is moved axially on the ring 14 in the direction of the arrow F, that is to say backwards.
  • the relative axial displacement of the constriction matrix 16 and of the ring 14 is preferably stopped before the end of smaller diameter of the flared section 18a of the cavity does not reach the rear end 14b, the furthest from the free end 10a of the pipe 10, of this ring 14.
  • the tubular element 12 has, in the vicinity of its rear end, a radial bulge 13.
  • the constriction is stopped without completely restricting the ring on the bulge. This ensures a reliable connection between the elements of the connection device, while avoiding local crushing of the pipe on the bulge, which could harm its mechanical qualities.
  • the ring 114 has a first portion 115a which must not be constricted.
  • This portion 115a which, in the example shown, extends forwardly beyond the front end 110a of the flexible pipe 110, can serve as a housing for an annular seal 117 or be provided with a fastening member to a rigid tubular end piece to which the pipe is to be connected
  • the portion 115a constitutes an axial obstacle which makes it impossible to use, under the conditions previously mentioned in relation to FIGS. 1 to 3, the shrinking matrix 16 in one piece.
  • a shrinking matrix 116 is therefore used, comprising two shells 116a and 116b.
  • the shells 116a and 116b are first moved away from one another to define a sufficient passage for the ring or, more precisely, for the front portion 115a of the latter.
  • the axial shrinkage proper begins after bringing these two shells close to the ring until this passage is removed.
  • a cavity 118 of the matrix is defined, having a flared section 118a and a cylindrical section of small diameter 118b.
  • the small end 121 of the cavity located opposite the wide end 120 of the latter, is open. This makes it possible, as seen in FIG. 5, to arrange the matrix 116 around the portion 115b to be constricted, while leaving the first portion 115a of the ring 114 to protrude forwards beyond the matrix.
  • the shrinking of the portion 115b is carried out by moving the matrix 116 in the direction of the arrow F, that is to say by making it pass from its start position of the shrinkage, represented in broken dashed lines, to its position of end of the constriction, shown in solid lines.
  • the ring is held axially using a necking tool 122.
  • the tool 122 comprises jaws which cooperate with the front part of the ring 114. More specifically, the jaws of the tool 122 are placed around the ring, immediately behind the first portion 115a of the latter, and cooperate in abutment with a shoulder 114 'to hold the ring and prevent it from moving backwards during the shrinking.
  • the region 115c in which the preliminary step of radial constriction is carried out extends forwardly beyond the front end 110a of the flexible pipe, so that the possible drawbacks linked to this radial necking operation do not affect the pipe.
  • the diameter of the intermediate portion 115c is immediately less than or equal to the necking diameter, in which case no preliminary step of radial necking is necessary.
  • the ring is maintained axially and the matrix is displaced in the direction of arrow F, it would also be possible to carry out the constriction by axially holding the matrix and by moving the ring in the opposite direction to that of arrow F. The important thing is that the two elements which constitute the ring and the matrix are moved relative to each other in the direction of arrow F, that is to say say backwards, along the portion to shrink.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Forging (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Medicinal Preparation (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Pipe Accessories (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
EP95939312A 1994-11-02 1995-11-02 Einschnürungsverfahren Expired - Lifetime EP0737114B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9413063 1994-11-02
FR9413063A FR2726208B1 (fr) 1994-11-02 1994-11-02 Procede de retreint
PCT/FR1995/001438 WO1996014177A1 (fr) 1994-11-02 1995-11-02 Procede de retreint

Publications (2)

Publication Number Publication Date
EP0737114A1 true EP0737114A1 (de) 1996-10-16
EP0737114B1 EP0737114B1 (de) 2002-03-27

Family

ID=9468416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95939312A Expired - Lifetime EP0737114B1 (de) 1994-11-02 1995-11-02 Einschnürungsverfahren

Country Status (17)

Country Link
EP (1) EP0737114B1 (de)
JP (1) JP3179499B2 (de)
KR (1) KR100264241B1 (de)
CN (1) CN1067303C (de)
AT (1) ATE214983T1 (de)
BR (1) BR9506434A (de)
CA (1) CA2178740C (de)
CZ (1) CZ292243B6 (de)
DE (1) DE69526065T2 (de)
ES (1) ES2173984T3 (de)
FR (1) FR2726208B1 (de)
HU (1) HU214856B (de)
MX (1) MX9602541A (de)
PL (1) PL178959B1 (de)
RU (1) RU2113929C1 (de)
TW (1) TW305783B (de)
WO (1) WO1996014177A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011036365A2 (fr) 2009-09-24 2011-03-31 Etablissements Caillau Collier de serrage et son procede de fabrication.

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4554896B2 (ja) * 2003-06-16 2010-09-29 カヤバ工業株式会社 ピストンロッドの製造方法
FR2868713B1 (fr) * 2004-04-09 2006-07-21 Faurecia Sys Echappement Machine de retreint d'un volume d'echappement
US9857008B2 (en) 2008-11-20 2018-01-02 Gates Corporation Crimpable or swageable fluid power ferrules, couplings, systems and methods employing torque communication
JP5779104B2 (ja) * 2009-02-03 2015-09-16 ドナルド ダン，レスリー コンベア・アイドラ・ロール用のエンドハブ組立体
CN101856695B (zh) * 2010-05-21 2012-01-04 柳州市金元机械制造有限公司 一种推拉式软轴外管扣铆方法及其设备
CN103143661B (zh) * 2013-03-21 2015-08-26 陕西飞机工业（集团）有限公司 一种模锻件公差优化方法
CN104139145A (zh) * 2014-08-11 2014-11-12 贵州航天新力铸锻有限责任公司 核电堆内构件用导向喇叭口锻件的锻制方法
CN105537488A (zh) * 2016-02-04 2016-05-04 柳州龙润汽车零部件制造有限公司 单工序空调管螺栓镦接成型模具
US11105437B2 (en) 2017-07-03 2021-08-31 Continental Automotive Systems, Inc. Combined inlet and outlet check valve seat
US10820130B2 (en) * 2017-09-18 2020-10-27 Bose Corporation Method of forming a speaker housing
CN109590714B (zh) * 2018-12-13 2022-07-08 重庆金山医疗技术研究院有限公司 金属筒的压装机构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2314002A (en) * 1941-12-03 1943-03-16 Scoville Mfg Company Method for manufacturing and assembling high pressure couplings
US3726122A (en) * 1971-03-10 1973-04-10 Mc Donnell Douglas Corp Swaging tool
US5031301A (en) * 1990-01-30 1991-07-16 Hans Oetiker Method for connecting a reinforced hose with a coupling

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9614177A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011036365A2 (fr) 2009-09-24 2011-03-31 Etablissements Caillau Collier de serrage et son procede de fabrication.

Also Published As

Publication number Publication date
CZ292243B6 (cs) 2003-08-13
RU2113929C1 (ru) 1998-06-27
FR2726208A1 (fr) 1996-05-03
CA2178740A1 (en) 1996-05-17
EP0737114B1 (de) 2002-03-27
KR100264241B1 (ko) 2000-08-16
JP3179499B2 (ja) 2001-06-25
JPH09507795A (ja) 1997-08-12
WO1996014177A1 (fr) 1996-05-17
TW305783B (de) 1997-05-21
MX9602541A (es) 1997-05-31
DE69526065D1 (de) 2002-05-02
CZ189196A3 (en) 1996-09-11
HUT75563A (en) 1997-05-28
KR960706379A (ko) 1996-12-09
CN1138302A (zh) 1996-12-18
CN1067303C (zh) 2001-06-20
DE69526065T2 (de) 2002-11-07
CA2178740C (en) 2005-09-13
HU214856B (hu) 1998-06-29
ES2173984T3 (es) 2002-11-01
FR2726208B1 (fr) 1997-01-17
HU9601811D0 (en) 1996-09-30
PL178959B1 (pl) 2000-07-31
BR9506434A (pt) 1997-09-02
ATE214983T1 (de) 2002-04-15

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