| 摘要 |
592,887. Boring and facing machines. VLIEG, C. B. DE. Aug. 9, 1944, No. 15161. [Class 83 (iii)] A boring and facing machine of the type in which a horizontal spindle is carried in a vertically adjustable saddle on a column secured to the side of a bed adjacent the end thereof, is characterized in that the spindle extends at right angles to the bed guideways and midway between the bed ends, a saddle being movable along the guideways and having guides on its upper surface parallel to the spindle for a work platen which is the same ' length as the saddle, whereby, at all working positions of the platen, there is no overhang at the saddle ends. The tool spindle 24, Fig. 4, adapted for the usual axial feed is mounted for vertical sliding movement on a column 12. The latter is rigidly secured to a horizontal bed 11 with ways at right angles to the spindle axis. A saddle 23 movable by power means on the bed ways carries a work platen 25 which is power traversed by an independent electric motor 73, Fig. 5, a slip clutch 75, chain 74, and feed screw 66. The power traverse of the platen enables rapid positioning of the work and is used in conjunction with an adjustable stop 79 which arrests the platen in a pre-determined position when an inclined stop face adjacent to the feed nut on the platen strikes the stop surface 79 the drive slipping when this position is reached. The inclined stop faces result in a wedging action which forces a V-shaped guide rib 29 on the platen, Fig. 6, into closer relation with a corresponding guideway 28 on the saddle, thus automatically locking the platen for a working operation. Adjustment of the wedge stop 79 is by means of a screw 82, bevel gearing, and a shaft 84 provided with a hand wheel 85, an indicator scale 91 and micrometer head 86 showing the setting made. |
