GB916650A - Improvements relating to the formation of finned metal tube - Google Patents

Improvements relating to the formation of finned metal tube

Info

Publication number
GB916650A
GB916650A GB17211/58A GB1721158A GB916650A GB 916650 A GB916650 A GB 916650A GB 17211/58 A GB17211/58 A GB 17211/58A GB 1721158 A GB1721158 A GB 1721158A GB 916650 A GB916650 A GB 916650A
Authority
GB
United Kingdom
Prior art keywords
mandrel
fins
workpiece
discs
grooves
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
GB17211/58A
Inventor
George Thomas Maughan
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.)
Fairey Co Ltd
Original Assignee
Fairey Co 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 Fairey Co Ltd filed Critical Fairey Co Ltd
Priority to GB17211/58A priority Critical patent/GB916650A/en
Publication of GB916650A publication Critical patent/GB916650A/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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)

Abstract

916,650. Making ribbed tubes; flow of metal produced by rotary rubbing tools; mandrels. FAIREY CO. Ltd. Aug. 28, 1959 [May 29, 1958], No. 17211/58. Addition to 884,980. Classes 83 (2) and 83 (4). In a process for forming external fins on tubular stack according to the parent Specification, a mandrel 22 with an external groove or grooves 24 is inserted in the bore whereby during formation of the external fins, the tube metal is also caused to flow into the mandrel grooves to form an internal fin or fins. The workpiece 12, preferably of magnesium-beryllium alloy, is mounted in a lathe chuck 10 and spaced discs 18 with undulating peripheries, driven at high speed by a motor 14 are pressed into the surface of the workpiece to soften and extrude metal backwardly between the discs and form the fins. A milling cutter 19 follows the discs. Mandrel 22 is driven by motor 14 through gearing 26 and is fed axially through the workpiece as the discs are traversed by the lathe saddle 11. The mandrel grooves may extend throughout the length of the workpiece. In another embodiment, Fig. 4 (not shown), the mandrel has square threads and is non-rotatable. Helical fins formed internally may or may not be the same pitch as the external fins. In a further embodiment, Fig. 6 (not shown), the mandrel has six circumferentially-spaced longitudinal grooves and is mounted for free rotation with the workpiece to form longitudinal fins in its bore.
GB17211/58A 1958-05-29 1958-05-29 Improvements relating to the formation of finned metal tube Expired GB916650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB17211/58A GB916650A (en) 1958-05-29 1958-05-29 Improvements relating to the formation of finned metal tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17211/58A GB916650A (en) 1958-05-29 1958-05-29 Improvements relating to the formation of finned metal tube

Publications (1)

Publication Number Publication Date
GB916650A true GB916650A (en) 1963-01-23

Family

ID=10091166

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17211/58A Expired GB916650A (en) 1958-05-29 1958-05-29 Improvements relating to the formation of finned metal tube

Country Status (1)

Country Link
GB (1) GB916650A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289451A (en) * 1964-05-22 1966-12-06 Babcock & Wilcox Co Method and apparatus for forming internal helical ribbing in a tube
US4847989A (en) * 1983-06-16 1989-07-18 Burr Oak Tool & Gauge Company Spiral expanding bullet
US5154555A (en) * 1988-10-20 1992-10-13 Kabushiki Kaisha Komatsu Seisakusko Equal-pitch groove processing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289451A (en) * 1964-05-22 1966-12-06 Babcock & Wilcox Co Method and apparatus for forming internal helical ribbing in a tube
US4847989A (en) * 1983-06-16 1989-07-18 Burr Oak Tool & Gauge Company Spiral expanding bullet
US5154555A (en) * 1988-10-20 1992-10-13 Kabushiki Kaisha Komatsu Seisakusko Equal-pitch groove processing device

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