| 摘要 |
1496434 Boring bars and heads APRITOGEPGYAR 25 April 1975 [3 May 1974] 17235/75 Heading B3C A boring bar comprises a shaft 1 with a slit 1b at its end intersecting a cylindrical bore 1a inclined to the shaft axis. Cylindrical tool carrier 2 having a flat 2a is movable along the bore by a coarse adjusting element, screw 4, whose socketted head engages a stop pin 7 fixed in the shaft and whose shank is screw threaded into a slotted and threaded sleeve 5 fixed in a longitudinal bore in carrier 2 by a pin 6. Screw 4 may be fixed in its adjusted position by tightening clamping screw 8 which bears against sleeve 5. The carrier is clamped in its longitudinal position by screw 3 which flexes the slit end of the shaft and, by bearing against flat 2a locates the carrier rotationally, see Fig. 2. In the embodiment shown in Fig. 3, fine adjustment of the carrier is obtained by adjustment of stop 17 in slot 16 by means of threaded sleeve 18 moved axially along throughbore 15 by axially fixed threaded spindle 9, backlash being taken up by spring 10. Screw 12 acts as an end stop; the head of spindle 9 may have a calibrated dial. A conventional fine adjustment mechanism 14, Fig. 5, may be provided in the carrier 2 of the embodiment of Figs. 1 and 2. |
