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1. (WO2018028810) TOOL FOR PRODUCING AN INTERNAL THREAD IN A WORKPIECE PILOT HOLE

Pub. No.:    WO/2018/028810    International Application No.:    PCT/EP2017/000808
Publication Date: Fri Feb 16 00:59:59 CET 2018 International Filing Date: Tue Jul 11 01:59:59 CEST 2017
IPC: B23G 5/18
B23G 7/02
Applicants: AUDI AG
Inventors: KOPTON, Peter
Title: TOOL FOR PRODUCING AN INTERNAL THREAD IN A WORKPIECE PILOT HOLE
Abstract:
The invention relates to a tool for producing an internal thread (7) in a workpiece pilot hole (1) having a thread major diameter (dA) and a thread minor diameter (dK), which tool (9) has a thread-forming section (11), by means of which an internal thread profile (27) can be produced in a pilot hole wall, said internal thread profile having the thread major diameter (dA) and a thread inner diameter (di), wherein the tool (9) has a drilling section (13), by means of which the thread inner diameter (di) of the internal thread profile (27) can be expanded to the thread minor diameter (dK) by machining. According to the invention, at least one, in particular exactly one chip groove (43) is associated with the drilling section (13) of the tool (9), by means of which chip groove the chips produced as the thread inner diameter (di) is expanded to the thread minor diameter (dK) can be transported away.