GB634654A - Improvements in or relating to stock stops for automatic lathes - Google Patents

Abstract

634,654. Lathe details. MANUFACTURE DE MACHINES DU HAUT-RHIN SOC. ANON. Nov. 15, 1946, No. 34009. Convention date, Nov. 23, 1945. [Class 83 (iii)] A stock-stop mechanism for automatic lathes with bar-feed is given a slight axial displacement away from the stock to release it therefrom, followed by an arcuate movement in a plane perpendicular to the axis of the bar to move the stop into inoperative position. The stop 3, Fig. 1, adapted to limit the feed of bar-stock 1 in the head 2 of an automatic lathe, is carried at the end of a spindle 4. The opposite end of the spindle is threaded at 7, Fig. 4, to receive the boss of a control lever 8. The latter is connected through the links 9, 11, 12, and pivoted lever 13 for oscillation by a cam 15 carried on the auxiliary or main cam shaft of the lathe. A spring 18 maintains a contact roller on the lever 13 in engagement with the cam. The first part of the oscillatory movement of the lever 8 unscrews it from the spindle 4 and as the end of the spindle is constantly pressed to the left, Fig. 4, by a dish-like spring 22 the stop moves a small distance axially to clear it from the end of the stock-bar. Continued rotation of the lever 8 brings an abutment 26, Fig. 5, thereon against an abutment 25 on a ring 21 keyed to the end of spindle 4; the spindle and the stop are thus rotated to clear the end of the stock. Motion in the opposite direction results in the ring 21 moving through action of spring 27 to follow the movement of lever 8 until abutment 24 finally contacts a part of the machine frame 6, Fig. 5. Continued motion results in the screwing up of the control lever 8 on the end of the spindle 4 and the positioning of the stop arm 3 in its initial position for gauging the length of stock.