US 11,865,650 B2
Electrodes for gas- and liquid-cooled plasma torches
Volker Krink, Finsterwalde (DE); Frank Laurisch, Finsterwalde (DE); and Ralf-Peter Reinke, Finsterwalde (DE)
Assigned to KJELLBERG-STIFTUNG, Finsterwalde (DE)
Appl. No. 16/622,267
Filed by KJELLBERG-STIFTUNG, Finsterwalde (DE)
PCT Filed Jul. 12, 2018, PCT No. PCT/EP2018/068942
§ 371(c)(1), (2) Date Dec. 12, 2019,
PCT Pub. No. WO2018/229308, PCT Pub. Date Dec. 20, 2018.
Prior Publication US 2020/0214118 A1, Jul. 2, 2020
Int. Cl. H05H 1/34 (2006.01); B23K 9/32 (2006.01); B23K 10/00 (2006.01); B23K 35/02 (2006.01); B23K 37/00 (2006.01); H05H 1/28 (2006.01)
CPC B23K 9/322 (2013.01) [B23K 10/00 (2013.01); B23K 35/0216 (2013.01); B23K 37/003 (2013.01); H05H 1/28 (2013.01); H05H 1/34 (2013.01); H05H 1/3436 (2021.05); H05H 1/3457 (2021.05)] 13 Claims
OG exemplary drawing
 
1. An electrode for a gas-cooled plasma cutting torch comprising:
an elongate electrode body with an open end and with a closed end which define a longitudinal axis L, and
an emission insert in said closed end, wherein a cavity extends in said electrode body from said open end of said electrode body towards said closed end, and said cavity is fluidically connected via at least one opening in a wall of said electrode body or in a front solid portion of said closed end to a radial outer side, in relation to said longitudinal axis L, of said electrode body;
wherein said cavity has a first cylindrical portion with straight parallel sides and a circular cross section having a first diameter D and has a second cylindrical portion with straight parallel sides and a circular cross section having a second diameter D wherein said first cylindrical portion is situated closer to said closed end than said second cylindrical portion, and said first diameter D is smaller than said second diameter D;
wherein said radial outer surface, in relation to said longitudinal axis L, of said electrode body has—proceeding from said closed end—a substantially cylindrical first portion and a second portion which adjoins said first portion, wherein said second portion has, per unit of length along said longitudinal axis L, a larger surface area than said first portion and has a thread or at least one spiral-shaped groove.