GB725662A - An improved machine for carrying out milling, boring, turning, drilling and tapping operations - Google Patents

Abstract

725,662. Combined turning, boring and milling machines. SOC. NOUVELLE DE CONSTRUCTION DE MACHINES-OUTILS ET D'OUTILLAGE, PROCEDES C.W.B. Jan. 20, 1953 [Jan. 23, 1952], No. 1633/53. Class 83(3). A combined turning, boring, drilling, tapping and milling machine comprises two upright columns 1, 2, Fig. 1, supporting a beam 5 which is adjustable angularly about a trunnion 11 and has slideways 6 for a universal headstock 9, and a tool-driving spindle (not shown), in a vertical plane in the headstock and transverse to the ways 6. A cylindrical, flat, curved or tapered surface may be produced on work supported on a table that can be rotated, by the feeding motor or by a further motor, at the cutting speed for turning operations and fed along ways 25, 26. The tool may be arranged horizontally or in any other position by holders 36 adjustable to vary the inclination of the tool. Profile milling may be effected by rotating the table 30 or traversing it on the ways 25, 26. The headstock 9 may be fed along slideways 8 on a slide 7 by a motor located beneath a hood 35 on the headstock, and the slide moved along the ways 6, as by a motor 34 driving a feed-nut (not shown), on a screw 33. An arcuate rack 15 on the column 2 concentric with the trunnion 11 facilitates angular adjustment of the beam 5 by engagement with a worm carried by the arm, in a housing 16, and driven from a key 20 through bevel gears. The beam is clamped, after adjustment, by bolts 12, 23, the heads of which engage at least one arcuate slot 13, 14, 24 in each column and concentric with the trunnion 11, and the column 2 may be taller than the column 1. Instead of supporting the columns on blocks 4 replaceable to vary the height of the trunnion, the latter may be carried by a slide 65, Fig. 6, adjustable on the column by a screw 59 rotatable in synchronism with another on the other column and arranged to adjust the height of the rack 15. In a further modification, Fig. 7, in which the screws need not be rotated in synchronism and arcuate clamping slots 55 are provided in the trunnion slide only, the unpivoted end of the beam 72 is supported in a guide 68 pivotally-mounted on the slide 67. As an alternative to mounting the worktable on ways 25, 26, it may have no linear feed and the columns be mounted to slide.