Patent GB-1141685-A (GB)
Title: Brushing or polishing machine
IPC: B24B47/06
Filed: 1966-04-12
Abstract: 1,141,685. Abrading. WURTTEMBERGISCHE METALLWARENFABRIK. 12 April, 1966 [9 April, 1965], No. 15944/66. Heading B3D. A machine for bruching or polishing workpieces, such as hollow trays W comprises control met in a horizontale plane along directions perpen is p for vertical direction. The support for the workpieces and template consists of a table 53 having rollers mounted on guide rods carried by a lower table 19 also having rollers mounted on guide rods at 90 degrees to the first-mentioned guide rods. The table is movable back-andforth and stepwise by electric, hydraulic or pneumatic means under the control of templates 1, 2, Fig. 1, which correspond to the outline of the workpiece and co-operate with a switch member which, when engaged by a template reverses the direction of traverse of the table and moves the table stepwise transversely to the direction of traverse so that the movement of the table relative to the tool follows the path 8 shown dotted in Fig. 1. A further control template 3 can be raised by a cylinder and linkage 5 to a position between the templates 1, 2 so that the switch member engages the outer and inner templates to move the table and workpiece along the path 7 shown solid to effect brushing of the edge portions only of the workpiece. In an alternative arrangement of templates, Fig. 4, the switch member has a feeler which co-operates with two grooves 11 in the template corresponding to the outline of the workpiece to move the table supporting the workpiece relative to the tool in the path shown dotted so that the edge only of the workpiece is abraded. The switch member may be arranged so that the reversing means for the table is only actuated at each second operation of the switch member to move the table and workpiece in the path shown dotted in Fig. 1 whereby the entire area of the workpiece is presented to the tool. In another embodiment, the template 13, Fig. 8, is vertically adjustable to present one or other of two contours 15, 16 to a follower 18 mounted on the table, the contour 15 corresponding to one edge of the workpiece and the other contour 16 corresponding to the other edge of the workpiece. The template also has a contour 14 which is engageable by a stylus 20 on the table to control the movement of the table and workpiece during brushing of the entire surface of the workpiece. In yet another embodiment, the table 34, Fig. 10, is movable to-and-fro on the lower table under the control of a cam 32, the lower table 35 being movable to-and-fro transversely to the upper table under the control of a second cam 31, both cams being rotated in unison, the tables being movable against the pressure of pneumatic cylinders. As described, the machine has two brushing tools 44, 45 mounted, with a stylus 50 on a rocker 40 one end of which is connected to an hydraulic cylinder which urges the stylus 50 and tools 44, 45 towards the copying template 51 and workpieces, respectively, so that, during the movement of the table in the horizontal directions, the tools move vertically to follow the contour of the workpieces. During movement of the table, cams engage switches to control paste feed, and front and rear limits of table movement.