GB129295A - Improvements in and relating to Machine Tools. - Google Patents

Abstract

129,295. Anderson, E. July 5, 1918, [Convention date]. Disk apparatus; spindles &c., treating.-A machine of the cross-slide reciprocating-table planer type is provided with alternative tabledriving mechanism and with supplemental toolslides and rotary spindles carried by the tool head so that the machine may perform a variety of work, including planing, slotting, milling, gearcutting, grinding, &c. Two forms of machine are shown. In the first, Figs. 1, 3, and 4, the table is driven for planing through the usual rack and bull wheel operated by open and crossed belts, the cross-slide being fed by a screw 55 operated by a reversible pawl and rack 48 reciprocated by a frictionally-oscillated slotted arm with an adjustable pin 45. The table may be traversed at a low speed in either direction by disconnecting the belt pulleys and engaging a worm-wheel 78 driven through a vertical shaft 76 from an overhead shaft 70 driven by cone pulleys from a countershaft 81. A continuous cross feed may be obtained from the vertical shaft through worm gearing 84. The tool slide is provided with the usual manual and power operated vertical feeds from the shaft 76 and carries an angularly-adjustable tool-box 95, a rotary spindle 100, and a reciprocating tool-slide 132. The rotary spindle is driven through bevel gearing 107 and a telescopic shaft 105 from the shaft 70. The reciprocating slide is driven by a crank-disk driven from the bevel gearing 107, through further bevel gearing capable of disengagement. The rotary spindle may carry a drill or be geared to a supplemental rotary spindle 122, Fig. 4, which may carry an end-mill 125; or the nose of this spindle may be provided with a pulley carrying a grinding-wheel driven from a pulley 108 carried by an intermediate shaft of the spindle-driving mechanism, the bevel drive of the spindle 122 being then disconnected. In the modified machine, Figs. 9 and 11, the slow traverse of the table in either direction is obtained from an overhead shaft 140, through a vertical shaft 144 and two cone pulley shafts on the side of the bed, the upper of which carries a worm 154 capable of disengagement from its worm-wheel, on the shaft of which is a pinion capable of gearing with the driving-rack, the pinion and bull wheel being slidably mounted to allow alternate engagement with the rack. The vertical shaft 144 also drives the rotarv tool spindle 100<a> and the reciprocating tool slide. The power vertical feed of the tool slide is obtained by a rack and pinion operated by worm gearing 173 through a friction clutch from the rotary tool spindle. The rotary spindle can be driven at a low speed through a train of bevel gearing from a cross-shaft 163 or at a higher speed through a long pinion 182 on the spindle from a spur-wheel 181 placed on one of the shafts of the spindledrive. The cross slide 193 is angularly adjustable in split bearings 194 carried by slides on the standards of the machine, indexing pins and holes being provided. The bed may have a scale 240, Fig. 9, and pointer to facilitate setting up work, and the cross slide may have spaced slots 242 coacting with a micrometer screw in the tool head to set the latter. By providing the machine with a rotary work table mounted on the bed and driven through worm gearing from the overhead shaft, the machine may be used for gear-cutting and various milling or slotting operations as well as for surface cutting and grinding The machine may also be equipped with a headstock and tailstock to enable cylindrical work to be turned or ground, Fig. 17, the axis of the work being parallel to the bed and the headstock being belt-driven from a long drum 122 overhead.