| 摘要 |
In order to increase the grinding performance and the smoothing effect, the grinding tools (31) are provided, in addition to the continuous grinding motion caused by the progressive advancement of work, with a further grinding motion which superposes the first-mentioned grinding motion. This additional grinding motion is carried out in alternating, mutually opposite directions by a drive device (44). The latter comprises a double-armed lever (45), which can rotate about a shaft (46), and a single-armed lever (47) which can pivot about a pin (48). The two levers (45, 47) are connected to each other in an articulated manner via a rigid connecting strap (49). The levers (45, 47) can be set in pivoting motion via an eccentric shaft (50) and a crank mechanism (51). Said pivoting motion can be transmitted, via rods (52), onto the tool holder (27) accommodating the grinding tools (31). <IMAGE> |
