| 摘要 |
A shank for a burnishing tool has a universal drive joint with a head which contains rollers engaged with a truncated conical surface at the end of the head. A spherical workpiece which may be a ball on a stud is drivenly supported with the axis of the stud disposed at an angle to the axis of the burnishing tool shank which is also driven, the drives being in opposite directions. The rollers have a point contact with the arcuate surface and the crossed axis relation of the driven spindles producing the spreading of the points of engagement so that the entire surface of the workpiece to be burnished will be highly polished in a very short time. |
