| 摘要 |
PCT No. PCT/CH85/00039 Sec. 371 Date Oct. 17, 1985 Sec. 102(e) Date Oct. 17, 1985 PCT Filed Mar. 5, 1985 PCT Pub. No. WO85/03892 PCT Pub. Date Sep. 12, 1985.In order to permit the use of bars of material to be machined without a preliminary preparation of the rearward end of the bar being necessary, the pusher head presents ribs extending inwardly, and the surfaces of which directed toward the axis form cone portions. Between these ribs are free spaces where possible burrs may lodge. The ribs include shearing edges for eliminating the burrs if the burr is located on a rib, rather than in the free space. Furthermore, the angle of conicity is small. Thus, a rear bar face in rough state, not having been prepared by straightening or taper turning, does not express itself by any appreciable decentering. |
