Valenite, Inc.

The Valeron Corporation

Raymond A Stephens

A boring tool is equipped with a radially adjustable clutter element, and a remotely-operated mechanism for adjusting the cutter element between its active and inactive positions. During movement of the tool into a hole in a work piece the adjustable cutter element is inactive; the cutting operation is performed by one or more non-adjustable cutter elements. When the tool holder reaches the limit of its penetration into the work piece the remote adjusting mechanism is operated to move the adjustable cutter element radially outwardly to an active cutting position. During return movement of the holder out of the work piece the adjustable cutter element performs a finish machining operation on the hole surface.

Boring tool having an adjustable cutter element

A boring bar in which a cutter element holder is adjustable around a transverse pivot axis, so that different cutting elements can be used to machine the hole surface during movement of the boring bar in opposite directions. The transverse pivot axis is defined by a torsional hinge that automatically returns the holder to a neutral position when the adjustment force is removed.

Boring tool having adjustable cutter elements

A motion conversion apparatus is disclosed having particular utility as a tool carrier actuator in a rotating taper thread generating tool head, wherein a plurality of tool carriers are moved axially of the workpiece and simultaneously transversly of the axis to form a tapered thread at the end of the workpiece. A portion of the actuating apparatus is mounted coaxially with a housing for the tool head and includes an inner and an outer actuating bar coupled together by helical keys and mating keyways such that relative axial motion between the inner and outer bars produces rotating movement of the outer bar. Rotation of the outer actuating bar is transferred to an actuating drum which has an outer surface having at least one helical keyway formed therein. In one embodiment, the actuating drum is a separate component rotating with the outer actuating bar via key-keyway pairs. A driven sleeve surrounds a portion of the actuating drum and is keyed to the helical keyway in a manner such that a given rotation of the drum produces a proportional axial linear movement by the sleeve.

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Sterling Heights, MI, United States of America

Raymond A Stephens