Patent ID: 6502295
Filing Date: 2003-01-07
Classification: B21D,Y10T

Abstract:
A method of assembling together, without welding, first and second pieces of plastically deformable material, said method comprising:making a rim hole in the first piece, the hole having a rim with an inside diameter D2i and an outside diameter D2e, and extending along an axis substantially perpendicular to a local mean plane of the first piece; making a counterbored hole having two successive diameters in the second piece, said counterbored hole extending along an axis substantially perpendicular to a local mean plane of the second piece, said counterbored hole having a first section of small diameter d8 and a second section of large diameter D8, the small diameter d8 being greater than the outside diameter D2e of the rim by a clearance value; inserting said rim into said counterbored hole, an annular gap being defined between an outer annular face of the rim and an inner annular face of the second section of the counterbored hole; and deforming an end portion of the rim so as to occupy at least part of the annular gap; said method further comprising, prior to the step of deforming the end portion of the rim, a step of inserting centering means in the rim hole, the centering means having a diameter Dc equivalent to the diameter of the first section of the counterbored hole minus twice the thickness of the rim, wherein; Dc=d8âˆ’(D2eâˆ’D2i) an axis of the centering means being maintained in a predefined reference position.