United Technologies Corporation

John J Kolesnik

James L Deal

Joseph A Gosselin

A process is described for inertia bonding a hollow shaft made of superalloy materials without causing compressive deformation in the shaft due to the high compressive forces generated in the segmented collet which grips the shaft. A method is also described for minimizing the residual stress in an inertia bonded joint, where the wall thicknesses of the two shaft portions to be bonded are unequal, by independently controlling the gripping forces on the portions so as to provide equal diameter reduction during the bonding process. A method for converting a front loading inertia bonding machine to a rear loading bonding machine is also described.

Inertia bonding of long shafts

A workpiece location and support means as described which is free from any tendency to locate the workpiece in a predetermined position. The workpiece is supported and located by a series of hydraulic actuators which in one condition permit the workpiece to move freely but in another hydraulic condition lock the workpiece in one place and do not permit motion thereof. The present invention has particular application as a workpiece support in inertia bonding machines.

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Southington, CT, United States of America

John J Kolesnik