FR2247298A1 - Cold drawing thin walled weldless tubes - produces accurately concentric bore involves internal mandrel and external die - Google Patents

Cold drawing thin walled weldless tubes - produces accurately concentric bore involves internal mandrel and external die

Info

Publication number
FR2247298A1
FR2247298A1 FR7434380A FR7434380A FR2247298A1 FR 2247298 A1 FR2247298 A1 FR 2247298A1 FR 7434380 A FR7434380 A FR 7434380A FR 7434380 A FR7434380 A FR 7434380A FR 2247298 A1 FR2247298 A1 FR 2247298A1
Authority
FR
France
Prior art keywords
tube
cold drawing
thin walled
internal mandrel
mandrel
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Withdrawn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
FR7434380A
Other languages
French (fr)
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.)
KM Kabelmetal AG
Original Assignee
KM Kabelmetal AG
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
Priority claimed from DE19732351316 external-priority patent/DE2351316A1/en
Priority claimed from DE19732352746 external-priority patent/DE2352746A1/en
Application filed by KM Kabelmetal AG filed Critical KM Kabelmetal AG
Publication of FR2247298A1 publication Critical patent/FR2247298A1/en
Withdrawn legal-status Critical Current

Links

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
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/30—Finishing tubes, e.g. sizing, burnishing
    • 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
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
    • B23D79/12—Machines or devices for peeling bars or tubes making use of cutting bits arranged around the workpiece, otherwise than by turning

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Metal Extraction Processes (AREA)
  • Turning (AREA)

Abstract

The tube is firstly not formed from an ingot. The outside surface at one extremity of the tube is turned exactly concentric with the bore. The tube is placed over a fixed mandrel, and an external guide or die fitted with a shaving knife is placed over the tube and is held concentric and axially level with the mandrel. The tube is then drawn between the mandrel and the die and shaving knife assembly. The dimensions and concentricity of the resulting tube are accurately predictable, as the knife cuts the exterior of the tube to leave a surface which is accurately concentric with the interior surface.
FR7434380A 1973-10-12 1974-10-11 Cold drawing thin walled weldless tubes - produces accurately concentric bore involves internal mandrel and external die Withdrawn FR2247298A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732351316 DE2351316A1 (en) 1973-10-12 1973-10-12 Cold drawing thin walled weldless tubes - produces accurately concentric bore involves internal mandrel and external die
DE19732352746 DE2352746A1 (en) 1973-10-20 1973-10-20 DEVICE FOR MANUFACTURING SEAMLESS METALLIC PIPES

Publications (1)

Publication Number Publication Date
FR2247298A1 true FR2247298A1 (en) 1975-05-09

Family

ID=25765937

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7434380A Withdrawn FR2247298A1 (en) 1973-10-12 1974-10-11 Cold drawing thin walled weldless tubes - produces accurately concentric bore involves internal mandrel and external die

Country Status (4)

Country Link
JP (1) JPS5087950A (en)
FI (1) FI296774A (en)
FR (1) FR2247298A1 (en)
IT (1) IT1021759B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0780091B2 (en) * 1985-06-19 1995-08-30 株式会社神戸製鋼所 Hollow billet scalping method and scalping device for metal extrusion

Also Published As

Publication number Publication date
FI296774A (en) 1975-04-13
IT1021759B (en) 1978-02-20
JPS5087950A (en) 1975-07-15

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Legal Events

Date Code Title Description
ST Notification of lapse