摘要 |
<p>The cage which carries the workpieces is mounted concentric to a disc which rotates the workpieces. In e.g. an arrangement in which the conical seating faces (2) of jet valve needles are to be ground concentric to support faces (A) which are also conical, the needles are mounted in a cage between two discs. The first disc (5) which is a spring disc, rotates in the opposite direction of a drive disc (6) but a little faster. This ensure that the needles are tipped over their support points in the cage. The needles will be stably supported with their cones against the grinding wheel (30), while at the same time they rotate rapidly. The support points for the needles in the cage are so arranged, that the axes of rotation of the workpieces are inclined by a small amount with reference to a radius. This arrangement ensures an axial infeed of the workpieces.</p> |