EP 3370904 A1 20180912 - HARD METAL INSERT AND ROCK DRILL
Title (en)
HARD METAL INSERT AND ROCK DRILL
Title (de)
HARTMETALLEINSATZ UND GESTEINSBOHRER
Title (fr)
INSERT EN MÉTAL DUR ET FORET À ROCHE
Publication
Application
Priority
- DE 102015118689 A 20151102
- EP 2016076378 W 20161102
Abstract (en)
[origin: WO2017076875A1] The invention relates to a hard metal insert (2) for a rock drill (1), which is designed as a spiral drill operating without percussion, comprising a cylindrical drill head (11) and a working end (13) comprising the hard metal insert (2). The hard metal insert (2) comprises two main cutting edges (22) arranged radially opposite one another with respect to a drilling axis of rotation (d) and at an angle to each other to form a centring tip (21), which can each be assigned a peripheral conveying helix (14). In order to realise a drill hole in an easier and simpler manner and without risk of damage, in a workpiece made of rock, glass or similar, it is proposed that the main cutting edges (22) are formed asymmetrically to one another, wherein at least one of the main cutting edges (22) defines a tip (23) projecting in the drilling direction (b) over the radial course of same in a middle region spaced apart from the radial ends thereof.
IPC 8 full level
B23B 51/02 (2006.01); B28D 1/14 (2006.01); E21B 10/58 (2006.01)
CPC (source: EP US)
B23B 51/02 (2013.01 - EP US); B28D 1/146 (2013.01 - EP US); E21B 10/44 (2013.01 - US); E21B 10/46 (2013.01 - US); E21B 10/58 (2013.01 - EP US); B23B 2226/75 (2013.01 - EP US); B23B 2251/085 (2013.01 - EP US); B23B 2251/14 (2013.01 - EP US); B23B 2251/18 (2013.01 - EP US); B23B 2251/50 (2022.01 - EP US)
Citation (search report)
See references of WO 2017076875A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 102015118689 A1 20170504; EP 3370904 A1 20180912; US 2019234150 A1 20190801; WO 2017076875 A1 20170511
DOCDB simple family (application)
DE 102015118689 A 20151102; EP 16790598 A 20161102; EP 2016076378 W 20161102; US 201615772776 A 20161102