Rolls-royce Corporation

George Durrant

Felicity Freeman

Stefan Jochen Wagner

John Sylvester Torpey

Alistair Buchanan

Christopher P Gibson

John Torpey

Christopher Gibson

A fixture for locating a straight edge of a curved surface of a part and holding the part in a fixed position during performance of a machining operation on the straight edge is described. The fixture includes: one or more supports for seating a convex curved surface of the part, one or more detachable end stops arranged to extend in a plane orthogonal to that in which the supports sit and against which, in use, the straight edge can be aligned, and a clamp arranged, in use, to push the convex curved surface against the supports such that the straight edge contacts the supports without obstruction of the straight edge.

Fixture for holding a complex-shaped part during a machining operation

A method for designing a baffle including using patterns to produce an array of shell moulds, generating a 3-D image of the outer surface of each shell mould in the array of shell moulds, stacking the individual 3-D images for a plurality of the shell moulds to produce a conglomerate shell mould profile, determining a maximum cross sectional area of the conglomerate shell mould profile in a plane orthogonal to a direction along which the shell moulds are to be drawn through the baffle, defining a baffle profile segment which is consistent with a substantial portion of the conglomerate shell mould profile at the maximum cross sectional area, scaling the baffle profile segment to provide an offset clearance between the baffle profile segment and the maximum cross sectional area of the conglomerate shell mould profile, and reproducing the baffle profile segment to provide an array of baffle profile segments.

Investment casting

A method for sentencing a manufactured component as a pass or fail is described. The method involves zoning a two-dimensional image of the component, weighting individual zones according to their importance in the load bearing function and comparing overall weighted dimensions against those of a pre-defined compliant component design. By considering the internal and external dimensions and offsetting variations between zones, a more accurate assessment of compliance can be achieved. It is envisaged that components which might otherwise have been rejected and scrapped may be accepted resulting in material and cost savings.

Pass fail sentencing of hollow components

Growing community of inventors

Derby, United Kingdom

George Durrant