Back to results
US 2020/0254538 A1Published application
End mill including flat relief having reinforced rigidity
AssigneeYg-1 Co., Ltd.
InventorsYoung Koon Park, Hyung Suk KIM, Seung Hyun LEE
Life of this patent
Estimating the term…
Abstract
An end mill having an eccentric flat relief formed thereon is proposed. The eccentric flat relief (simply referred to as “ELF”) includes at least three flat relief surfaces continuously arranged along a trajectory of an eccentric relief. Accordingly, the end mill, which combines strengths of the flat relief and an eccentric relief, has excellent rigidity and a heat discharge characteristic.
Claims3
An end mill for a heat-resistant alloy, the end mill comprising:
- a cutting part having a plurality of bottom blades at a front end thereof and a plurality of side blades at a peripheral surface thereof;
- and
- a shank part extended from the cutting part along a central axis of the cutting part in a longitudinal direction thereof,
- wherein an eccentric flat relief surface is provided in a land of at least one side blade of the plurality of side blades, the eccentric flat relief surface having at least three consecutive flat relief surfaces extending from a cutting edge, and
- wherein a relief angle of the eccentric flat relief obtained by taking arctangent of the ratio of a shortest distance of the eccentric flat relief surface to a maximum drop in a normal direction to the eccentric flat relief surface from a virtual outer circumferential surface defined by the cutting edge is 5° to 20°.
2 more elements
Dependencies are inferred from the claim text.