| 摘要 |
<p>1480938 Turbine blades TRW Inc 31 Oct 1974 [31 Oct 1973] 47230/74 Heading FIT [Also in Division B3] A method of forming a turbine blade, comprises providing a plurality of plies of a consolidated monotape, each ply being contoured, stacking the contoured plies to form a stack of the turbine blade contour and diffusion bonding the plies together. The consolidated monotape is made up of collimated filaments of boron, silicon carbide coated boron, silicon carbide, boron nitride coated boron, graphite and the like, in a matrix of aluminium, aluminium alloy, titanium alloy, nickel alloy and the like. A turbine blade 10 is made from an array of plies divided into two sections by a wedge 14. The plies 17, 29, 30, 42 are of aluminium alloy and the plies 22-28, 31-37 are monotape plies with the filaments lying along the axis of the blade. The remaining plies have their filaments disposed at 45 degrees to the blade axis with the filaments of adjacent plies at 90 degrees to each other. The two stacks of plies together with the wedge 14 and root blocks 12, 13 are diffusion bonded. The shape of the individual plies is determined by analyzing blade section charts, and dividing the blade into a desired number of laminations. A series of forming tools is generated from plaster masters conforming to layers throughout the blade thickness, the forming tools being used to cut the plies either singly or in stacks. The plies are cut with stacking register lines, holes or notches as required and they include identification maps.</p> |
