Tool unit clamping apparatus having improved short stroke lockin

Details Tool unit clamping apparatus having improved short stroke lockin Tool unit clamping apparatus having improved short stroke lockin

1995-04-17

1999-07-27

Pitts, Andrea L.

Turning

Lathe

Tool rest

82158, 409234, 279 75, B23C 526

Patent

active

059271680

ABSTRACT:
An improved, short-stroke clamping apparatus for detachably connecting a tool unit to a tool supporter is provided of the type having a canister member which includes apertures for admitting spherical locking elements, and a lock rod that is reciprocally movable a stroke distance along an axis and which has cam portions for moving the spherical locking elements through the canister apertures into engagement with the tool unit. In the improved clamping apparatus, the canister member apertures are elongated along the stroke axis. This allows the spherical locking elements to move axially along the cam portions of the lock rod as well as radially, such that locking engagement can be achieved with a shorter axial stroke movement of the lock rod. The aperture walls may also be angled toward the spherical locking elements to allow even greater axial movement of the locking elements, thereby further shortening the lock rod stroke. The shorter lock rod stroke in turn advantageously shortens the tool envelope, and increases both the rigidity and life of the spring package that withdraws the lock rod.

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