Ramping Insert and High-Feed Milling Tool Assembly

摘要

A high-feed milling tool assembly includes a tool and a ramping insert. The ramping insert includes ramping, feed and side sub-edges. The ramping and feed sub-edges are longer than the side sub-edges and converge with increasing proximity to the side sub-edge to which they are both connected.

主权项

1. A ramping insert comprising:
opposing first and second rake surfaces; an insert peripheral surface connecting the first and second rake surfaces; an insert screw hole opening out to opposing sides of the insert peripheral surface, the insert screw hole having an insert screw hole axis; and first and second cutting edges extending along an intersection of the insert peripheral surface and a corresponding one of the first and second rake surfaces; each of the first and second cutting edges comprising:
a first ramping sub-edge; a first side sub-edge; a first feed sub-edge connected to the first ramping sub-edge and the first side sub-edge; a second ramping sub-edge connected to the first side sub-edge; a second side sub-edge connected to the first ramping sub-edge; and a second feed sub-edge connected to the second ramping sub-edge and the second side sub-edge; wherein:
each of the ramping and feed sub-edges is longer than each of the side sub-edges; a maximum rake surface length of each rake surface is measurable between the first and second side sub-edges thereof, and each of the ramping and feed sub-edges converge with increasing proximity to the side sub-edge to which they are both connected; wherein:
each ramping sub-edge comprises a sharp ramp corner portion, said sharp ramp corner portion being a corner portion of the ramping sub-edge closest to a feed sub-edge; each feed sub-edge comprises a sharp feed corner portion adjacent to one of said sharp ramp corner portions; and a connection point of the ramping sub-edge to the feed sub-edge is located in the middle of a corner formed by the adjacent corner portions.