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US 11,433,462 B2Granted
Drilling tool
AssigneeTungaloy Corporation
InventorHiroya Shikama
Life of this patent
Estimating the term…
Abstract
A drilling tool with improved structure to improve chips discharging performance. The drilling tool comprises a cutting insert 60 having a cutting edge 62 at the front end portion and a main body 10 mounted with the cutting insert 60, further, the drilling tool comprises a hollow discharge channel 12 formed inside the main body 10, and the discharge channel 12 has a curved surface 14 for guiding the chips S in a direction towards the base end portion opposite to the front end portion.
Claims9
A drilling tool comprising:
- a cutting insert, wherein the cutting insert has a cutting edge at a front end portion;
- a main body, wherein the main body is mounted with the cutting insert;
- a hollow discharge channel, wherein the hollow discharge channel is formed inside the main body, and
- a curved surface formed in an inside surface of the discharge channel for guiding a chip in a direction towards a base end portion opposite to the front end portion, the curved surface extending rearward along a partial length of the discharge channel starting from immediately behind the cutting insert;
- wherein the curved surface has a helical shape around the rotation axis of the drilling tool.
2 more elements
Dependencies are inferred from the claim text.