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DRILL BIT
专利权人:
Liam Patrick Ellis
发明人:
Liam Patrick Ellis
申请号:
US13989357
公开号:
US20130253521A1
申请日:
2011.11.25
申请国别(地区):
US
年份:
2013
代理人:
摘要:
A drill bit (1) has a central axis (A) and comprises a tapered cutting end part (2) terminating in a drill tip (3) at one end of the drill bit (1), a shank (4) extending from an opposing end of the drill bit (1), and a body (4a) extending between the cutting end part (2) and the shank (4). A plurality of flutes (5) are formed in the drill bit (1) and helically extend along the body (4a) into the cutting end part (2). Each flute (5) has a flute leading side wall (6) and a flute trailing side wall (7). A land (9) is defined on the body (4a) between each of the flutes (5) and extends to the cutting end part (2). In any body cross-sectional plane extending perpendicular to the central axis (A) through the body (4a), a land leading edge region (11) of each land (9) adjoining the flute trailing side wall (7) of a leading adjacent flute (5) is convexly curved.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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