GB364002A - Improvements in or relating to screw propellers - Google Patents

Improvements in or relating to screw propellers

Info

Publication number
GB364002A
GB364002A GB24794/30A GB2479430A GB364002A GB 364002 A GB364002 A GB 364002A GB 24794/30 A GB24794/30 A GB 24794/30A GB 2479430 A GB2479430 A GB 2479430A GB 364002 A GB364002 A GB 364002A
Authority
GB
United Kingdom
Prior art keywords
rolls
per cent
forging
blank
aluminium
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
GB24794/30A
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.)
ALUMINIUM Ltd
Original Assignee
ALUMINIUM 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 ALUMINIUM Ltd filed Critical ALUMINIUM Ltd
Publication of GB364002A publication Critical patent/GB364002A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
    • B21K3/04—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like blades, e.g. for turbines; Upsetting of blade roots

Landscapes

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

Abstract

364,002. Screw propellers. ALUMINIUM, Ltd., 22, Canada Life Building, Toronto, Canada.-(Assignees of Handler, A. A.; 2210, Harvard Avenue, Cleveland, Ohio, U.S.A.) Aug. 19, 1930, No. 24794. Convention date, Aug. 19, 1929. [Class 114.] A screw propeller is manufactured from a blank by applying a deforming force, by forging rolls, which .is progressively increased from the hub to the tip. The blank A, Fig. 1, has an end-piece 1 whereby it may be held during the process of roller forging. The blank A of aluminium alloy is first heated to a condition wherein it is readily workable, about 820‹ F., and is then subjected to the action of the forging rolls, a number of passes of the rolls being used for successive deformations. In one method the rolls are mounted eccentrically so that the deforming force increases progressively during a rolling pass, when the general propeller shape, Figs. 5 and 6, is obtained. Further shaping may be by the action of forging dies or pressing. The blade is finished by cleaning, trimming and sizing, heated to 960‹ F. for about 12 hours and then quenched and aged for 18 hours at a temperature of 310‹ C. It is stated that under this treatment the wrought metal fibres are set up in flow lines in parallelism with the outer surface. When an aluminium alloy is used, a suitable composition is 94 per cent aluminium, 4¢ per cent copper, ¥ per cent manganese and ¥ per cent silicon.
GB24794/30A 1929-08-19 1930-08-19 Improvements in or relating to screw propellers Expired GB364002A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US364002XA 1929-08-19 1929-08-19

Publications (1)

Publication Number Publication Date
GB364002A true GB364002A (en) 1931-12-21

Family

ID=21888408

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24794/30A Expired GB364002A (en) 1929-08-19 1930-08-19 Improvements in or relating to screw propellers

Country Status (1)

Country Link
GB (1) GB364002A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823889A (en) * 1950-04-05 1958-02-18 Stalker Dev Company Rotor construction and fabrication
US3246699A (en) * 1964-06-10 1966-04-19 Outboard Marine Corp Propeller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823889A (en) * 1950-04-05 1958-02-18 Stalker Dev Company Rotor construction and fabrication
US3246699A (en) * 1964-06-10 1966-04-19 Outboard Marine Corp Propeller

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