FR2032576A5 - Precision machining of thin-walled hollow - metal objects - Google Patents

Precision machining of thin-walled hollow - metal objects

Info

Publication number
FR2032576A5
FR2032576A5 FR6936947A FR6936947A FR2032576A5 FR 2032576 A5 FR2032576 A5 FR 2032576A5 FR 6936947 A FR6936947 A FR 6936947A FR 6936947 A FR6936947 A FR 6936947A FR 2032576 A5 FR2032576 A5 FR 2032576A5
Authority
FR
France
Prior art keywords
mandrel
workpiece
thin
precision machining
metal objects
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
FR6936947A
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.)
TICHONOVICH KHIM
Original Assignee
TICHONOVICH KHIM
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 TICHONOVICH KHIM filed Critical TICHONOVICH KHIM
Priority to FR6936947A priority Critical patent/FR2032576A5/en
Application granted granted Critical
Publication of FR2032576A5 publication Critical patent/FR2032576A5/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

Workpiece is heated and then mounted on a mandrel and cooled, after which the mandrel is removed to leave a precise geometric shape of the interior of the workpiece. Specifically the outside may be precision-machined without removal of the mandrel. The mandrel may be of material of linear coefficient of expansion lower than that of the workpiece, and have an initial outside perimeter of its transverse cross-section higher than the initial inside perimeter of the workpiece by the difference in linear expansion of these perimeters during heating.
FR6936947A 1969-10-28 1969-10-28 Precision machining of thin-walled hollow - metal objects Expired FR2032576A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR6936947A FR2032576A5 (en) 1969-10-28 1969-10-28 Precision machining of thin-walled hollow - metal objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6936947A FR2032576A5 (en) 1969-10-28 1969-10-28 Precision machining of thin-walled hollow - metal objects

Publications (1)

Publication Number Publication Date
FR2032576A5 true FR2032576A5 (en) 1970-11-27

Family

ID=9042182

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6936947A Expired FR2032576A5 (en) 1969-10-28 1969-10-28 Precision machining of thin-walled hollow - metal objects

Country Status (1)

Country Link
FR (1) FR2032576A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2330475A1 (en) * 1975-11-05 1977-06-03 Carpenter Technology Corp IMPROVEMENTS IN THE MANUFACTURING METHODS OF HIGH PRECISION TUBULAR ELEMENTS AND TUBULAR ELEMENTS THUS MANUFACTURED

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2330475A1 (en) * 1975-11-05 1977-06-03 Carpenter Technology Corp IMPROVEMENTS IN THE MANUFACTURING METHODS OF HIGH PRECISION TUBULAR ELEMENTS AND TUBULAR ELEMENTS THUS MANUFACTURED

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Legal Events

Date Code Title Description
ST Notification of lapse