Invention Grant
- Patent Title: Drill bit and method for manufacturing
- Patent Title (中): 钻头和制造方法
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Application No.: US13576858Application Date: 2011-01-27
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Publication No.: US09403246B2Publication Date: 2016-08-02
- Inventor: Juergen Schwaegerl , Peter Sollfrank
- Applicant: Juergen Schwaegerl , Peter Sollfrank
- Applicant Address: US PA Latrobe
- Assignee: KENNAMETAL INC.
- Current Assignee: KENNAMETAL INC.
- Current Assignee Address: US PA Latrobe
- Agent Larry R. Meenan
- Priority: DE102010006796 20100204
- International Application: PCT/US2011/022681 WO 20110127
- International Announcement: WO2011/097109 WO 20110811
- Main IPC: B23B51/02
- IPC: B23B51/02 ; B23P15/32 ; B24B1/00 ; B24B3/24 ; B24B19/02

Abstract:
A method for manufacturing a drill bit (1), wherein in a first step the chip flutes (12) are ground into a round rod, in a second step the round rod is ground down to its outer diameter (15, 16) with simultaneous grinding of the drill-bit back (13), and wherein in a third step the drill-bit front (4) is ground, and a drill bit (1) having at least one chip flute (12) and one secondary cutting edge and one drill-bit back (13) adjoining the secondary cutting edge, the drill-bit back (13) sloping downwards as the distance from the secondary cutting edge increases, in order to create a clearance that becomes continuously larger as the distance from the point of intersection (19) of the secondary cutting edge with the drill-bit back (13) increases.
Public/Granted literature
- US20130028677A1 DRILL BIT AND METHOD FOR MANUFACTURING Public/Granted day:2013-01-31
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