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Hollow component manufacture

  • US 5,611,944 A
  • Filed: 04/28/1995
  • Issued: 03/18/1997
  • Est. Priority Date: 05/10/1994
  • Status: Expired due to Term
First Claim
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1. A hollow component manufacturing method including the steps of:

  • (a) forming at least two metallic sheets by a process of diffusion bonding them together in selected places, at least one of the sheeets being capable of superplastic deformation and at least one of the sheets accommodating in the thickness thereof gas channel means for entry of pressurized gas into the interior of the component after diffusion bonding,(b) where the sheets are not diffusion bonded together, expanding at least one of said sheets away from at least one other sheet by means of inflation by supplying pressurized gas under superplastic forming conditions through the gas channel means into the interior of the component to produce the desired interior structure for the component,(c) locally deforming the material of at least one of the sheets at least in the area defining the gas channel means to reduce the height of said gas channel means,(d) making at least one fusion weld pass over the deformed area defining the gas channel means thereby to obturate the gas channel means with weld material such that the gas channel means is hermetically sealed.

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