GB1188001A - Machine for Trimming Workpieces. - Google Patents

Abstract

1,188,001. Workpiece and blanks transferring. SOAR VALLEY ENG. CO. Ltd. 19 July, 1968 [5 May, 1967], No. 20896/67. Headings B3B and B3T. A machine for trimming workpieces comprises a headstock 3 having a rotatable chuck 11 and a workpiece feeding device for supplying successive workpieces from a magazine 2 to the chuck, at least one cutting tool 39 mounted in a tool holder 40 on a carriage 45 which is movable by fluid pressure means 46 to feed the tool to the workpiece and air pressure means for ejecting the trimmed workpiece from the chuck, the whole sequence of operation being automatic and effected pneumatically. Each workpiece is picked up from a location 8 at one end of the magazine 2, by a transfer unit 24 including a pneumatic piston and cylinder unit 30, and is displaceable laterally into alignment with the chuck into which the workpiece is inserted by actuation of the piston on the unit 30, the workpiece being retained in the chuck by suction exerted through orifices 21 which are connected to the interior of the hollow spindle 12 of the machine. The transfer unit is then moved back to its pick-up station to permit the machining of the workpiece by the tools 39. A dashpot unit 51 is incorporated in the pneumatic tool operating means 46 to permit a two speed infeed of the tools and a subsequent rapid return. The chuck is formed by a portion 15 integral with the end of the spindle 12 and an annular screw cap 18 which retains a centre housing member 19 which is interchangeable to permit the accommodation of different size workpieces. The pneu matic pressure in the chuck is reversed to eject the finished workpiece from the chuck into a suitable receptacle. The whole sequence of operation is effected automatically in a predetermined manner. In the embodiment described the workpieces being trimmed are valve sealing rings made of rubber.