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    • 2. 发明专利
    • SE0702766L
    • 2009-06-14
    • SE0702766
    • 2007-12-13
    • SECO TOOLS AB
    • JANSSON MIKAEL
    • The present invention relates to an indexable milling insert (1) having triangular shape, the cutting insert (1) comprising a mounting hole (7) placed centrally in the cutting insert, a first support surface (3) and a second support surface (5), which support surfaces (3, 5) are parallel with each other and act as alternating support surfaces, that the cutting insert (1) comprises three equally long sides (S1, S2, S3), which extend between the parallel support surfaces (3, 5), that the cutting insert (1) is provided with main cutting edges (H1-H6), which are orientated perpendicularly to the centre axis (9) of the mounting hole (7) as well as provided in such a way that a rotation of the cutting insert (1) around the centre of the mounting hole (7) to an alternative insert seat alternatively a turning of the cutting insert (1) to an alternative insert seat provides an identical location of the main cutting edges (H1-H6) in relation to a piece to be machined. The invention also relates to a milling tool equipped with the milling inserts (1) defined above. Characteristic of the milling insert according to the present invention is that the cutting insert (1) comprises planar support surfaces (11-13) situated on the sides (S1-S3), that the support surfaces (11-13) in the respective sides (S1-S3) form mutual angles of 60° and that each one of the minor cutting edges (B1-B6) has a chamfer (10), the width of the chamfer (10) of the minor cutting edge (B1) extending transversely to the corresponding width of the chamfer of an adjacent minor cutting edge (B2).