Indexable tangential railway wheel milling inserts and cutting tool holders

A railway wheel milling tool system comprising:

• a plurality of tangential railway wheel milling inserts, each milling insert comprising:
• a first face, a second face opposite the first face, a first pair of opposing side surfaces, a second pair of opposing side surfaces and a corner radius connecting each of the first pair of opposing side surfaces to each of the second pair of opposing side surfaces;
• a corner edge portion formed at an intersection between each of the first and second faces and each corner radius;
• and
• a cutting edge formed at an intersection between each of the first and second faces and each of the first pair of opposing side surfaces, each of the cutting edges comprising:
• a first cutting edge segment extending from a first one of the corner edge portions, the first cutting edge segment including a convex portion;
• a central wiper cutting edge segment extending from the first cutting edge segment, the central wiper cutting edge segment comprising a convex portion;
• and
• a second cutting edge segment extending from the central wiper cutting edge segment to a second one of the corner edge portions, the second cutting edge segment including a convex portion, and
• wherein the radius of the convex portion of the central wiper cutting edge segment is greater than a radius of the convex portion of the first cutting edge segment and a radius of the convex portions of the second cutting edge segment;
• and
• a second cutting edge segment extending from the central wiper cutting edge segment to a second one of the corner edge portions, the second cutting edge segment including a convex portion;
• and
• a railway wheel truing cutter comprising a plurality of insert pockets positioned about a longitudinal axis of the tool holder, each insert pocket comprising:
• a bottom clearance surface;
• a first sidewall portion extending generally perpendicularly from the bottom clearance surface;
• a second sidewall portion extending generally perpendicularly from the bottom clearance surface opposite the first sidewall portion;
• a first alignment wedge extending from the first sidewall portion to the bottom clearance surface;
• and
• a second alignment wedge extending from the second sidewall portion to the bottom clearance surface.

A railway wheel truing cutter comprising:

• a plurality of insert pockets positioned about a longitudinal axis of the tool holder, each insert pocket comprising:
• a bottom clearance surface;
• a first sidewall portion extending generally perpendicularly from the bottom clearance surface;
• a second sidewall portion extending generally perpendicularly from the bottom clearance surface opposite the first sidewall portion;
• a rear seating surface extending generally perpendicularly from the first and second sidewall portions and the bottom clearance surface;
• a first alignment wedge extending from the first sidewall portion to the bottom clearance surface, the first alignment wedge comprising a first taper angle;
• a second alignment wedge extending from the second sidewall portion to the bottom clearance surface, the second alignment wedge comprising a second taper angle;
• and
• a radially recessed front portion, wherein
• the first taper angle is greater than or less than the second taper angle.