| 摘要 |
PCT No. PCT/EP92/00568 Sec. 371 Date Nov. 30, 1993 Sec. 102(e) Date Nov. 30, 1993 PCT Filed Mar. 14, 1992 PCT Pub. No. WO92/21471 PCT Pub. Date Dec. 10, 1992.The invention relates to a shell end mill with a holder (12), a two-piece cylindrical cutting section (10) releasably secured to the holder (12), at least two helical chip grooves (18) at a circumferential distance apart in the cutting section (10), a set of substantially radial base support surfaces (22) arranged one behind the other along a chip groove side and a insert seat (20) with radially limiting side support surfaces on the groove base side to take indexable inserts (24) in an arrangement of axially overlapping pairs. The inner tips (24) arranged behind the outermost frontal indexable inserts (24') are axially clamped to the insert seats without abutment. In particular, the frontally inoperative cut (42) of the inner indexable inserts (24) engages without abutment in a back-cut (46) in the adjacent insert seat. This design makes it possible to make the base support surfaces (22) of the indexable inserts and the back-cuts (46) engaging with them frontally simply and logically by shell milling in the cutting section (10). |
