| 摘要 |
According to the invention, a device with a housing (10) which has a drive (M, R, 14/14', 16/16') for a bottom centring spindle (18) and a top centring spindle (18') with a torque divider (50) in between serves to centre optical lenses for mechanical clamping, especially during bevelling and facetting. The centring spindles are held in alignment by guide and clamping bearings (22, 22') and carry bell-shaped clamping elements (20, 20') between which the lens (L) to be machined can be clamped. For this purpose, a clamping means (24) is connected in parallel with a diaphragm piston (32), as a result of which a graduated sensitive in-feed of the bottom centring spindle (18) in axial direction (A) towards the top centring spindle (18') is guaranteed. A short-stroke piston (38) is located in each pressure cylinder (28). A long-stroke piston (40) with a through-bore (42) is arranged downstream of the short-stroke piston (38). The bottom centring spindle (18) is axially supported on the yoke (26) via the diaphragm piston (32) and can be driven independently of the state of the clamping means (24). …<IMAGE>… |
