Patent GB-118857-A (GB)
Title: Improvements in and relating to Machines for Grinding the Rollers of Roller Bearings, and like Articles.
Inventor: BOCK WILLIAM EMIL
IPC: B24B11/00
Filed: 1917-04-05
Abstract: 118,857. Bock, W. E. April 5, 1917. Disk and wheel apparatus.-Consists of a machine for grinding the convex ends of bearing-rollers &c. The roller, while in rotation on its own axis with its end in contact with the abrading-surface, is rocked about an axis substantially at rightangles to the axis of the roller, and at the same time the axis of oscillation is moved to and fro parallel to the abrading-surface, the direction of movement being the same as that of the end of the roller, due to the rocking movement. Automatic means are provided to supply the rollers to the work-holder, to eject them therefrom, and for passing a current of fluid under pressure through the work-holder to expel grit &c. The machine shown is adapted to deal with two rollers simultaneously. The rollers a are mounted in chucks 32, Fig. 6, the axes of which are radial to the axis of the grinding-wheel 46; the chucks are rotated by pinions 35, 36 from a spindle that is driven by belts 50, 55. The chuck bearings &c. are carried in a yoke 29 mounted to rock in top and bottom bearings 28, 30 carried by a table 25. The table is fixed on a slide 21, Figs. 1 and 4, which is moved to and fro bv a cam on the lower face of the rotating wheel 18; a cam on the upper face of this wheel works a slide 23, which is coupled by a link 56 to a pin on the lower end of the yoke and on the side of its axis remote from the grinding-wheel. The slides move in opposite directions. The rollers are supplied by hand to a pair of magazine tubes 61, Figs. 1 and 4, which pass through a supporting-bracket 60 fitted with a pair of pins for each tube. The pins are moved to and fro endways into and out of the tubes. The column of rollers rests upon the lower pin of each pair, until it is drawn out endways, whereupon the lowermost roller descends, the column being held up by the other pin nipping against the surface of the next roller. The rollers are delivered from the lower ends of the tubes into cavities in a receiver 62 mounted to rock on a vertical axis 94. The chucks, in the course of the movement of the yoke and slides, having arrived at the position shown in Fig. 4, with their axes passing through the axis 94, the receiver is turned to bring the rollers into line with the chucks, into which they are then pushed by spring plungers 109. The plungers are normally held back by triggers 112, the movement of which, and of the other parts concerned in the feed, are derived from cams on the slide 23. The rollers having been seated in the chucks, the slides and yoke commence the movement to swing the ends of the rollers across the periphery of the grinding-wheel ; upon the return movement, when the axes of the chucks lie on the line x-x, Fig. 4, the rollerejecting device comes into action. Each chuck is hollow and fitted with a ram 42; heads 134 on the rams engage the ends of arms 139 on a spindle 138, Fig. 10, which carries also a finger 141 adapted, in the backward movement of the yoke, to strike a finger 146 on the slide 25 and thus to cause the spindle and arms to rock and thereby advance the rams to push out the rollers. The rams are bored to form passages which connect by tubes 159 with a valve-box 150 controlling a supply of compressed air. The spindle 138 is formed with a depression which, as the spindle is turned, comes opposite a roller on the end of the valve stem; the valve then opens and the compressed air passes into the bores of the rams, from which it escapes by radial passages into the hollow chucks, blowing out grit &c. A trimming-tool 162 for the grinding-wheel is mounted on an adjustable arm 161. The grinding-wheel is mounted on a slide movable towards and from the work by a screw and nut.