Invention Grant
- Patent Title: Manufacturing process, tool stand, and drill bit
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Application No.: US16062537Application Date: 2016-12-06
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Publication No.: US10940527B2Publication Date: 2021-03-09
- Inventor: Guenter Domani , Carsten Peters , Florian Schroeder
- Applicant: Hilti Aktiengesellschaft
- Applicant Address: LI Schaan
- Assignee: Hilti Aktiengesellschaft
- Current Assignee: Hilti Aktiengesellschaft
- Current Assignee Address: LI Schaan
- Agency: Crowell & Moring LLP
- Priority: EP15200036 20151215
- International Application: PCT/EP2016/079815 WO 20161206
- International Announcement: WO2017/102417 WO 20170622
- Main IPC: B21K5/04
- IPC: B21K5/04 ; B23B51/02 ; B23P15/32 ; E21B10/44 ; B21D11/14 ; B21H7/18

Abstract:
A method for producing a drill includes cold forming of a rod-shaped blank to form a semifinished product having three or more rectilinear longitudinal ribs extending along a longitudinal axis of the semifinished product, introducing the longitudinal ribs into a first die and a second die in a working direction, where the first die bears against the longitudinal ribs in a direction of rotation about the longitudinal axis and the second die bears against the longitudinal ribs counter to the direction of rotation, pivoting the first die in the direction of rotation in relation to the second die in order to twist the longitudinal ribs between the first and second dies, pulling the longitudinal ribs 31 through the pivoted first die and the second die counter to the working direction in order to twist the longitudinal ribs and apply a drill head to the rear end in the working direction.
Public/Granted literature
- US20190015892A1 Manufacturing Process, Tool Stand, and Drill Bit Public/Granted day:2019-01-17
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