EP 3524774 A1 20190814 - NEW CUTTING PICK
Title (en)
NEW CUTTING PICK
Title (de)
NEUER SCHNEIDMEISSEL
Title (fr)
NOUVEAU PIC DE COUPE
Publication
Application
Priority
- CN 201610877452 A 20161009
- CN 2017092134 W 20170707
Abstract (en)
The present invention discloses a new cutting pick, comprising a body, a cutting tooth and a circular frustum peg provided on the body; wherein the cutting tooth is a polycrystalline diamond composite tooth and consists of a polycrystalline diamond composite layer and a hard alloy base seat; the body of the cutting pick comprises a body upper portion and a body lower portion, the body upper portion is provided therein with a hollow structure which is embedded with the cutting tooth part as well as the circular frustum peg; the body upper portion is provided at its top with a cone hole; the hard alloy base seat of the cutting tooth, the circular frustum peg, and the cone hole provided at the top of the body upper portion are connected together by interference fit. With the above solution(s) of the present invention, the effect(s) of welding or hot-pressing on the polycrystalline diamond cutting teeth can be avoided, the impact resistance and the wear resistance of the diamond composite teeth can be significantly improved, and the service life of the cutting pick can be significantly prolonged.
IPC 8 full level
E21C 35/183 (2006.01)
CPC (source: CN EP)
E21C 35/183 (2013.01 - CN); E21C 35/1831 (2020.05 - EP); E21C 35/1837 (2020.05 - EP); E21C 35/197 (2013.01 - EP)
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)
EP 3524774 A1 20190814; EP 3524774 A4 20200617; CN 106351657 A 20170125; WO 2018064901 A1 20180412
DOCDB simple family (application)
EP 17857782 A 20170707; CN 201610877452 A 20161009; CN 2017092134 W 20170707