AXN ®
Automatic indexing chuck Ø 210 - 1250 mm ■ Hydraulic clamping and indexing ■ 2 jaws ■ Divisions: 4 x 90° / 8 x 45° / 3 x 120° / 6 x 60° or specials Unique indexing system
Automatic indexing chuck
Extremely simple and rigid indexing system. On the indexing shaft there is a triangle, square or multiple face shape. The indexing shaft „A“ is rotated by the piston „C“ and is locked in position by the piston „B“. For clamping and indexing 4 hydraulic lines are needed.
Picture 1 Pressure in P1
Picture 2 Pressure in P2 (indexing) The locator B retracts and releases the indexing shaft A; the finger C moves forward and rotates the shaft by 45°.
Picture 3 Pressure in P1 The finger C retracts,
Indexing shaft A locked in position 1 by the locator B: turning operation on the first side of the component.
while the locator B moves forward rotating the shaft A to 90° and locking it in position 2 for machining of the workpiece.
4
Centrifugal force compensation system Unique hydraulic system designed to reduce the loss of gripping force caused by the centrifugal force on the clamping piston P and clamping jaw A. The counterweight M is in a radial hole in the chuck body connected to the hydraulic circuit through the non-return valve V. During rotation, the pressure created by the counterweight M increases the pressure on the clamping piston P and compensates for the loss of gripping force due to the centrifugal force. Indexing position control system The indexing control is mounted on the oil manifold. It is actuated by a rod system and monitored by 4 proximity switches. The cam „E“ on the indexing jaw moves the rear switch ring N“ via the rod „F“, lever „H“, rod „G“ and pullback spring „M“. The corresponding proximity switch „I“ for each indexing position is actauted by the switch ring „N“ and confirms, that the indexing position has been reached.
Interchangeability between AXN indexing chuck and front end power chuck HYD-S The AXN chuck can easily and quickly be changed with a front end power chuck with 3 or 4 jaws type HYD-S. The oil manifold and the tube bundle remain mounted on the machine to actuate the chuck.
SMW-AUTOBLOK 237
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