EP0175497A2 - Matrice pour étirer des tubes - Google Patents

Matrice pour étirer des tubes Download PDF

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Publication number
EP0175497A2
EP0175497A2 EP85305979A EP85305979A EP0175497A2 EP 0175497 A2 EP0175497 A2 EP 0175497A2 EP 85305979 A EP85305979 A EP 85305979A EP 85305979 A EP85305979 A EP 85305979A EP 0175497 A2 EP0175497 A2 EP 0175497A2
Authority
EP
European Patent Office
Prior art keywords
die
bore
tapered
housing
die member
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.)
Withdrawn
Application number
EP85305979A
Other languages
German (de)
English (en)
Other versions
EP0175497A3 (fr
Inventor
Nigel Henry New New
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.)
AE PLC
Original Assignee
AE PLC
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 AE PLC filed Critical AE PLC
Publication of EP0175497A2 publication Critical patent/EP0175497A2/fr
Publication of EP0175497A3 publication Critical patent/EP0175497A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/12—Die holders; Rotating dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof

Definitions

  • the present invention relates to a die for tube drawing for example the manufacture of plain bearings by drawing.
  • bearings may include semi-cylindrical bearing shells and cylindrical bearing bushes.
  • the general principles of manufacturing plain bearings by drawing, as developed by the present inventor, are described in the present Applicants' co-pending European Application No. 85303751.3.
  • the present invention is directed more specifically to the actual construction of the die and it is an object of the invention to provide a die construction for tube drawing which can produce plain bearings to very close tolerances, particularly the internal and external diameters, and thus the wall thickness.
  • a die for manufacturing plain bearings by drawing comprises a housing, a die member and a pressure member, the housing having a bore, part of which is tapered or part-conical, the die member having a tapered outer surface corresponding to that of the bore and being located in the tapered part of the bore, and the pressure member being arranged to exert axial pressure on the die member in the direction of taper of the bore and die member surface.
  • the pressure member extends into the bore to make contact with the die member by way of a screw thread connection with the housing.
  • the axial pressure can be exerted on the die member by screwing the pressure member into the housing.
  • fine adjustment of the die member inner dimension may be achieved by its slight contractions and expansions.
  • the die member may be of a ceramic material, one possible material being silicon nitride, though other known ceramic material may be used.
  • the degree of taper of the die member may be up to 10° (for the half angle) though it is unlikely to exceed 3° and is preferably between 30 minutes and,Z?.
  • the tapered bore surface is preferably provided with lubricant channels leading to grooves which preferably extend circumferentially. Furthermore, lubricant is preferably supplied under pressure, since this tends to force the die member away from the bore slightly thus minimising the risk of jamming and so allowing the die member to be removed and also allowing fine adjustnce by the pressure member to be effected more easily.
  • the die of the present invention may be used with any strip, for example bearing strip consisting of a metal backing and a lining of bearing material. Its use, together with a suitable severing apparatus, can enable finished bearings to be produced from a flat strip without any subsequent machining and without risk of damage to the lining material.
  • the die comprises a housing 11, a die member 12 and a pressure member in the form of a screw-threaded collar 13.
  • the housing 11 has a bore 14 having a screw-threaded portion 15 engaging the screw-threaded collar 13 and a tapered section 16.
  • the die member 12 has an internal forming surface 17 polished to a high finish and an external surface 18 which is tapered to match the tapered section 16 of the bore 14 and is located therein as shown.
  • the degree of taper of the tapered section 16 and the die external surface 18 shown in Figure 1 has been greatly exaggerated. In practice, the degree of taper is unlikely to exceed 1° (for the half angle) and would preferably be between 20 and 45 minutes. In the embodiment shown, the taper has a half angle of 35 minutes.
  • the tapered surface 16 has two oil grooves 19 extending circumferentially. These are supplied with lubricant under pressure via a supply network 21 formed in the housing 11. A tapped inlet 22 is provided for connection to a suitable source of oil under pressure (not shown).
  • a plug indicated in broken lines 23 extends through the die member 12 and collar 13. This also has a highly polished surface.
  • a flat bearing strip is introduced into the die member 12 in the direction of arrow A and drawn through thereby 'wrapping' it around the plug 23 to form effectively a closed cylindrical tube. This is then severed to form plain bearings of the desired length. If semi-cylindrical bearings are required, two separate strips may be introduced. These can be formed together as a tube and then separated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
EP85305979A 1984-08-23 1985-08-22 Matrice pour étirer des tubes Withdrawn EP0175497A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8421455 1984-08-23
GB848421455A GB8421455D0 (en) 1984-08-23 1984-08-23 Plain bearings by drawing

Publications (2)

Publication Number Publication Date
EP0175497A2 true EP0175497A2 (fr) 1986-03-26
EP0175497A3 EP0175497A3 (fr) 1986-10-08

Family

ID=10565745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85305979A Withdrawn EP0175497A3 (fr) 1984-08-23 1985-08-22 Matrice pour étirer des tubes

Country Status (7)

Country Link
EP (1) EP0175497A3 (fr)
JP (1) JPS6167516A (fr)
KR (1) KR860001621A (fr)
AU (1) AU4654185A (fr)
BR (1) BR8504016A (fr)
ES (1) ES296386Y (fr)
GB (1) GB8421455D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994015731A1 (fr) * 1993-01-12 1994-07-21 Paramount Die Co., Inc. Ensemble matrice pour etirage de fils
WO2003101638A1 (fr) * 2002-05-31 2003-12-11 Sumitomo Electric Industries,Ltd. Materiaux pour filiere pour corps a diamants frittes et filiere pour corps a diamants frittes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245677B (en) * 1990-07-02 1993-09-01 British Gas Plc Splittable die

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1015913A (en) * 1910-01-04 1912-01-30 John Stratton Apparatus for drawing wire.
FR1443601A (fr) * 1965-07-23 1966-06-24 Forster Ag Hermann Dispositif pour l'étirage des produits profilés
GB1399597A (en) * 1971-06-24 1975-07-02 Ross P M Drawing die assemblies
DE2713986A1 (de) * 1977-03-30 1978-10-05 Ziehstein Kaempfer Kg Fassung fuer zieheinsaetze

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1015913A (en) * 1910-01-04 1912-01-30 John Stratton Apparatus for drawing wire.
FR1443601A (fr) * 1965-07-23 1966-06-24 Forster Ag Hermann Dispositif pour l'étirage des produits profilés
GB1399597A (en) * 1971-06-24 1975-07-02 Ross P M Drawing die assemblies
DE2713986A1 (de) * 1977-03-30 1978-10-05 Ziehstein Kaempfer Kg Fassung fuer zieheinsaetze

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994015731A1 (fr) * 1993-01-12 1994-07-21 Paramount Die Co., Inc. Ensemble matrice pour etirage de fils
US5402664A (en) * 1993-01-12 1995-04-04 Paramount Die Co., Inc. Wire drawing die assembly
WO2003101638A1 (fr) * 2002-05-31 2003-12-11 Sumitomo Electric Industries,Ltd. Materiaux pour filiere pour corps a diamants frittes et filiere pour corps a diamants frittes
US7131314B2 (en) 2002-05-31 2006-11-07 Sumitomo Electric Hardmetal Corp. Material for diamond sintered body die and diamond sintered body die
CN1309494C (zh) * 2002-05-31 2007-04-11 住友电气工业株式会社 金刚石烧结体拉拔模用材料及金刚石烧结体拉拔模

Also Published As

Publication number Publication date
BR8504016A (pt) 1986-06-10
ES296386Y (es) 1988-03-16
EP0175497A3 (fr) 1986-10-08
JPS6167516A (ja) 1986-04-07
ES296386U (es) 1987-08-16
GB8421455D0 (en) 1984-09-26
KR860001621A (ko) 1986-03-20
AU4654185A (en) 1986-02-27

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Inventor name: NEW, NIGEL HENRY NEW