(19)
(11)EP 2 633 942 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
21.09.2016 Bulletin 2016/38

(43)Date of publication A2:
04.09.2013 Bulletin 2013/36

(21)Application number: 13156617.6

(22)Date of filing:  25.02.2013
(51)International Patent Classification (IPC): 
B23P 15/04(2006.01)
F01D 5/14(2006.01)
F04D 29/38(2006.01)
F01D 5/26(2006.01)
F01D 5/16(2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30)Priority: 29.02.2012 US 201213408216

(71)Applicant: United Technologies Corporation
Hartford, CT 06101 (US)

(72)Inventor:
  • Parkin, Michael
    South Glastonbury, CT Connecticut 06073 (US)

(74)Representative: Hull, James Edward 
Dehns St. Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

  


(54)Method of securing low density filler in cavities of a blade body of a fan blade


(57) A method of forming a fan blade (62) includes the step of positioning a piece of low density filler (72) in a cavity (66) of an inner exposed surface (70) of a fan blade body (64). An upper surface (98) of the piece of low density filler (72) is located above the inner exposed surface (70) of the fan blade body (64), and the low density filler (72) has a density lower than a density of a material of the fan blade body (64). The method further includes the steps of positioning the fan blade body (64) in a lower die (90) of a press (88) and applying pressure to the inner exposed surface (70) of the fan blade body (64) with an upper die (92) of the press (88) to compress the low density filler (72) such that the upper surface (98) of the piece of low density filler (72) is approximately flush with the inner exposed surface (70) of the fan blade body (64).







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