WERKZEUGMASCHINE, INSBESONDERE HORIZONTAL-WERKZEUGMASCHINE, MIT EINER VORRICHTUNG ZUM AUSGLEICH DES DURCHHANGS EINES WERKZEUGTRAEGERS, UND VERFAHREN ZUR VORNAHME DES AUSGLEICHS

摘要

An improved machine tool includes an extendible ram or tool support arm. As the ram is extended, the outer end portion of the ram deflects downwardly under the influence of gravity. To compensate for the deflection of the ram, the angular orientation of the ram relative to upwardly extending tracks is changed to raise the outer end portion of the ram. This is accomplished by means of gibs or deflection compensation cams which are moved to rotate a carriage or saddle on which the ram is mounted. The extent of deflection of the ram varies as a function of the distance which it extends outwardly from the carriage. Therefore it is necessary to store data indicative of the deflection of the ram at various degrees of extension and to adjust the orientation of the ram in accordance with this data as the ram is extended. The data indicating the extent to which the ram deflects is stored by means of a cam mounted on the carriage. The cam is read by a transducer which moves with the ram. The extent of deflection of a second tool support arm or boring bar carried by the ram varies as a function of the extent to which the boring bar extends outwardly from the ram. Accordingly, a cam connected with the ram is read by a transducer connected with the boring bar to determine the compensation for deflection of the boring bar relative to the ram. Relatively heavy right angle drive attachments may be utilized in association with the ram. Therefore a third cam is provided to store data indicative of the deflection which results from mounting of the attachment on the outer end of the ram.