Method and apparatus for executing of grinding vorga narrow or corresponding vorga narrow

摘要

1,237,927. Grinding. RANK ORGANISATION Ltd. 17 Oct., 1969 [23 Oct., 1968], No. 50376/68. Heading B3D. Apparatus for performing polishing and like operations upon a plurality of workpieces, such as lenses 12, comprises means for bringing each of a plurality of workpieces into operative engagement with individual respective tools 14, means for imparting relative rotary movement between the workpieces and tools to effect polishing or the like, means for intermittently disengaging the workpieces and tools, and means for interchanging the relative positions thereof to bring each one of the tools into position for operative engagement with each respective one of the workpieces. The lenses 12, of which there may be ten, are mounted in spindles 2 rotatably carried by a turret 1 rotatable on a sleeve 5 which passes through a base-plate 3 on a frame 4. The spindles are rotated by gears 11 meshing with a common gear 10 which is rotatably mounted on the sleeve 5 and is integral with a pulley driven by a belt 8 from a motor 7. The polishing tools 14 are joined by ball joints 19 to levers 13 which are movable to raise and lower the tools relative to a turret head 6 by pneumatic cylinders 15. The turret head is oscillatable by a lever 17 which is secured to the shaft 5 and driven by a motor 18, the length of stroke of the oscillation and the degree of offset of the tools being adjustable by hand wheels controlling the position of a pair of perpendicularly arranged slides interconnected by a linkage to the drive from motor 18 and the lever 17. The turret 1 is indexed after a predetermined time of engagement of each tool with each lens by a pneumatic cylinder 21 connected by a chain to a toothed sprocket wheel. After each indexing movement, the turret is locked by a pneumatic cylinder 25 extending a plunger 26 into a recess 27 in the turret. Temperature controlled coolant is supplied through a pipe 32 to a distribution pipe 29 which is rotated by a belt drive 30 from a motor 28 to supply the coolant to the lens and tools.