| 摘要 |
<p>An apparatus (5) for rounding off edges of openings (9) in a work piece (8), like internal openings, or cut outs, in steel plates, is disclosed. The apparatus (5) comprises a belt grinding machine (5a) having continuous grinding belt (6) running over several belt guiding rollers (1a, 1b, 1c, 1d) which are provided on a support frame (3). Two of the rollers (1a, 1b) are provided on a cradle (2), said cradle (2) is pivotally supported in the support frame (3). The grinding belt (6) is, between the rollers (1a, 1b) on the cradle (2), intended for rectilinear working of the work piece (8), and a device (11) is arranged for operating the cradle (2) in a pendulum like movement about the pivotal support (12) during a grinding operation.</p> |
