WO1995003902A1 - Procede et appareil permettant de realiser une rainure longitudinale dans la paroi d'un passage - Google Patents

Procede et appareil permettant de realiser une rainure longitudinale dans la paroi d'un passage Download PDF

Info

Publication number
WO1995003902A1
WO1995003902A1 PCT/GB1994/001700 GB9401700W WO9503902A1 WO 1995003902 A1 WO1995003902 A1 WO 1995003902A1 GB 9401700 W GB9401700 W GB 9401700W WO 9503902 A1 WO9503902 A1 WO 9503902A1
Authority
WO
WIPO (PCT)
Prior art keywords
passage
wall
mandrel
working surface
groove
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.)
Ceased
Application number
PCT/GB1994/001700
Other languages
English (en)
Inventor
Peter James Boote
Richard Frederick Evans
Robert Brookfield Lloyd
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.)
Camloc UK Ltd
Original Assignee
Camloc UK Ltd
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 Camloc UK Ltd filed Critical Camloc UK Ltd
Publication of WO1995003902A1 publication Critical patent/WO1995003902A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling

Definitions

  • This invention relates to a method and apparatus for forming a longitudinal groove in the wall of a passage.
  • the invention provides a method and apparatus for forming a longitudinal groove of varying depth in the wall of the passage defined by a hollow tubular body.
  • the invention is particularly useful in manufacturing the cylinder member of a damper in which one or more grooves in the cylinder wall permit passage of working fluid past the piston of the damper.
  • the invention will be particularly described with reference to this application. It should be appreciated, however, that the invention is generally applicable to any machining operation in which a longitudinal groove is required in the wall of a passage of the work piece.
  • a common method for damping movement of one member relative to another is to couple a cylinder to one of the members and to couple a piston, working in the cylinder, to the other of the members.
  • a suitable working fluid for example an oil, partially or fully fills the cylinder and a passage is provided which permits restricted flow of the working fluid past the piston so that movement of the two members relative to each other is damped.
  • One possible means of providing the passage for fluid flow is to provide one or more grooves in the internal wall of the cylinder. By varying the cross-sectional area of the or each groove along the length of the cylinder the damping characteristics of the damper can be varied according to the position of the piston within the cylinder.
  • forming longitudinal grooves of varying cross-section within the cylinder has involved relatively slow and expensive machining techniques and has not, in any event, been possible for relatively small diameter cylinders.
  • the preferred embodiment of the present invention provides a method by which a longitudinal groove of varying cross-section can be formed accurately and rapidly within relatively small diameter tubes suitable for use as the cylinders of relatively small and inexpensive dampers.
  • a method of forming a longitudinal groove in the wall of a passage comprises inserting a mandrel into the passage to engage the wall of the passage, said mandrel including a working surface which, when the mandrel engages the wall of the passage, is located facing, and in a predetermined spatial relationship with, the portion of the wall in which the groove is to be formed; and forcing a carriage to run through said passage along the working surface of the mandrel, the carriage carrying a forming member such that as the carriage moves along the working surface the forming member forms a groove in the wall of the passage with the base of the groove parallel to the working surface of the mandrel.
  • the mandrel working surface will be parallel to the portion of the wall in which the groove is to be formed so that as the carriage moves along the working surface the forming member forms a groove of constant depth. If a groove of varying depth is required then the working surface of the mandrel is machined to converge and/or diverge from the portion of the wall in which the passage is to be formed so that as the carriage moves along the working surface a groove of varying depth is produced.
  • the working surface of the mandrel will be machined to be parallel to the corresponding portion of the wall of the passage over the zone in which the constant depth groove is required and will be machined to converge with the portion of the wall of the passage in which the progressively deeper groove is required.
  • the method additionally comprises the step of withdrawing the mandrel from the passage in a manner which causes a profiling member provided on the mandrel distal of the working surface to run along the wall of the passage in which the groove is formed in order to re-form the wall to a desired profile.
  • apparatus for forming a longitudinal groove in the wall of a passage
  • the apparatus comprising a mandrel for entering the passage, the mandrel having a working surface thereon which, when the mandrel is within the passage and engaging the wall of the passage faces, and has a predetermined spatial relationship with, the portion of the wall of the passage in which the groove is to be formed; and a carriage for movement along the working surface, the carriage comprising a forming member which, as the carriage moves along the working surface, forms the required groove in the wall of the passage.
  • the mandrel incorporates a profiling member which, as the mandrel is withdrawn from the working passage, runs along the portion of the wall of the passage adjacent the groove to re-form the wall of the passage to a desired profile.
  • the forming member comprises a roller mounted on the carriage and the profiling member comprises a ball ⁇ bearing mounted within a socket provided in the distal end of the mandrel.
  • the tube 2 is intended to form the body of a damper in which a piston is slidably mounted within the tube.
  • the damper may, for example, be a combined damper and gas spring.
  • a mandrel 3 is inserted through the tube so that the distal end 4 of the mandrel is clear of the tube.
  • the mandrel when viewed in transverse cross-section, has an exterior part cylindrical surface which is a clearance fit within the tube 2.
  • a working surface 5 is machined on the mandrel.
  • the working surface 5 is the base of a channel 6 which is formed along the relevant portion of the mandrel. The arrangement is such that when the lower portion of the tube (as viewed in the drawing) rests snugly against the underside of the mandrel the working surface 5 faces, and is in a predetermined spatial relationship with, the interior upper surface of the tube.
  • the working surface 5 converges with the opposite interior wall of the tube 2 from approximately the point C to approximately the point D.
  • the convergence is approximately 0.25mm.
  • a carriage 7 is moved along the working surface 5.
  • the carriage runs on suitable bearings 8 which engage the working surface 5 and carries a forming roller 9 which has a forming profile on the periphery thereof to form the required shape of groove.
  • the carriage is moved along the working surface by means of a member 10 which is coupled to a suitable power source, for example a hydraulic ram or lead screw arrangement.
  • a suitable power source for example a hydraulic ram or lead screw arrangement.
  • the roller 9 forms the required groove.
  • the carriage 8 is withdrawn to the illustrated position relative to the mandrel. The mandrel may then be withdrawn from the tube.
  • the mandrel carries a hardened steel ball 11 in a pocket 12 formed in the distal end of the mandrel.
  • the ball is positioned such that as the mandrel is withdrawn the ball will roll along the interior surface of the tube 2 in the zone of the groove in order to roll out any excess material movement generated by the groove rolling process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

Procédé permettant de réaliser une rainure longitudinale dans la paroi (1) d'un passage. Le procédé consiste à introduire un mandrin (3) dans le passage, de façon à ce qu'il soit en contact avec la paroi dudit passage. Le mandrin possède une surface active (5) qui, après contact avec les parois du passage, est placée face à la partie de la paroi dans laquelle doit être réalisée la rainure et selon une relation spatiale prédéterminée. On provoque ensuite le déplacement d'un chariot (7) à travers le passage suivant la surface active du mandrin. Le chariot transporte un élément de formage (9) de telle sorte qu'au fur et à mesure que le chariot progresse le long de la surface active, une rainure est façonnée dans la paroi du passage, rainure dont la base est parallèle à la surface active du mandrin. On peut obtenir une rainure de profondeur augmentant progressivement, en forçant la surface active (5) à converger vers la paroi du passage (1).
PCT/GB1994/001700 1993-08-03 1994-08-03 Procede et appareil permettant de realiser une rainure longitudinale dans la paroi d'un passage Ceased WO1995003902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9316069.5 1993-08-03
GB9316069A GB2280628B (en) 1993-08-03 1993-08-03 Method and apparatus for forming a longitudinal groove in the wall of a passage

Publications (1)

Publication Number Publication Date
WO1995003902A1 true WO1995003902A1 (fr) 1995-02-09

Family

ID=10739889

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/001700 Ceased WO1995003902A1 (fr) 1993-08-03 1994-08-03 Procede et appareil permettant de realiser une rainure longitudinale dans la paroi d'un passage

Country Status (2)

Country Link
GB (1) GB2280628B (fr)
WO (1) WO1995003902A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104209382A (zh) * 2014-09-12 2014-12-17 沈阳飞机工业（集团）有限公司 一种铝合金导管接头圆环突起加工装置及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4210580B2 (ja) * 2003-11-07 2009-01-21 カヤバ工業株式会社 溝加工装置および溝加工方法
JP5833879B2 (ja) 2011-10-07 2015-12-16 株式会社ショーワ 溝加工装置および溝加工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2741799A1 (de) * 1977-04-20 1978-11-02 Hitachi Ltd Innennuten-formvorrichtung fuer waermetauscherrohre
JPS5985339A (ja) * 1982-11-05 1984-05-17 Toshiba Corp 流体軸受用グル−ブの加工方法および装置
GB2146273A (en) * 1983-09-07 1985-04-17 Fichtel & Sachs Ag Method of manufacturing a cylinder member of a cylinder piston unit
US4866966A (en) * 1988-08-29 1989-09-19 Monroe Auto Equipment Company Method and apparatus for producing bypass grooves

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182152A (en) * 1977-09-08 1980-01-08 Westinghouse Electric Corporation Grid sleeve bulge tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2741799A1 (de) * 1977-04-20 1978-11-02 Hitachi Ltd Innennuten-formvorrichtung fuer waermetauscherrohre
JPS5985339A (ja) * 1982-11-05 1984-05-17 Toshiba Corp 流体軸受用グル−ブの加工方法および装置
GB2146273A (en) * 1983-09-07 1985-04-17 Fichtel & Sachs Ag Method of manufacturing a cylinder member of a cylinder piston unit
US4866966A (en) * 1988-08-29 1989-09-19 Monroe Auto Equipment Company Method and apparatus for producing bypass grooves

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 195 (M - 323)<1632> 7 September 1984 (1984-09-07) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104209382A (zh) * 2014-09-12 2014-12-17 沈阳飞机工业（集团）有限公司 一种铝合金导管接头圆环突起加工装置及方法

Also Published As

Publication number Publication date
GB2280628B (en) 1996-10-23
GB9316069D0 (en) 1993-09-15
GB2280628A (en) 1995-02-08

Similar Documents

Publication Publication Date Title
US4866966A (en) Method and apparatus for producing bypass grooves
US3911707A (en) Finishing tool
CA2091812C (fr) Garniture de guide-soupape
CA1193527A (fr) Methode et dispositif d&#39;agrandissement ponctuel et precis du diametre du tubes de grande longeur
EP0572105B1 (fr) Procédé et dispositif pour former une crémaillères tubulaire
CN104723045A (zh) 一种台阶内孔大深径比轴的加工工艺及工具
JP3469505B2 (ja) 管にくぼみを作る方法とこの方法の使用によって製造される管
US4649728A (en) Integral joint forming of work-hardenable high alloy tubing
US4048703A (en) Collar sleeves and process and tool for the manufacture thereof
CA1117899A (fr) Methode de formage a froid de tubes a sections internes epaisses de la paroi
US4369558A (en) Outer race working method and apparatus therefor
WO1995003902A1 (fr) Procede et appareil permettant de realiser une rainure longitudinale dans la paroi d&#39;un passage
US5274921A (en) Forming method of bushing with outer sliding surface
DE3332216C2 (de) Verwendung einer Prägevorrichtung zur Herstellung mindestens einer axial verlaufenden Innennut an einem rohrförmig ausgebildeten Zylinder für Schwingungsdämpfer
US5265335A (en) Forming method of bushing with inner sliding surface
US4238949A (en) Process and apparatus for making metal outers and inners
WO2008003305A1 (fr) Procédé de production d&#39;une pièce à symétrie de rotation et pièce ainsi obtenue
CA1059839A (fr) Estampage d&#39;elements annulaires metalliques
BR9606354A (pt) Processo para a formação de uma secão bordeada e estreitada em um corpo oco cilindrico e dispositovo para a realização de processo
RU94037976A (ru) Инструмент для обработки внутренних цилиндрических отверстий методом пластической деформации
JPH11314128A (ja) 長手方向中間部内面に縦溝を有するパイプの製造方法
CN220739702U (zh) 一种柔性支撑套和齿轮加工工装
US2360724A (en) Method of making muzzle sleeves
US20240181515A1 (en) Device and method for continuously producing an at least partly hollow shaft having a varying inner and/or outer diameter
CN219425560U (zh) 一种用于成型滚子的冷镦模具

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA