Patent · US Active

Manufacturing process, tool stand, and drill bit

US10940527B2 · kind B2 · utility

0Cited by

2References

2Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Guenter DOMANI · Bad Birnbach, DE
Carsten Peters · Dresden, DE
Florian SCHROEDER · Maienfeld, CH

Key dates

Filing date	Dec 6, 2016
Grant date	Mar 9, 2021
Priority date	—
Expiry date	Jan 5, 2037

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23B2251/046
WIPO fieldMachine tools
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.