Studies on the Properties of the Low Pressure Type Gas Welding on Cutting Torch (Report 1)

Abstract

In these studies, authors intend to dicide suituble dimensions of the injector for low pressure type gas welding or cutting torch which give a stable oxy-acetylene flame.
As a preliminary experiment for investigation, the suction power of injector was measured through measurements of acetylene flow and pressure in the injecting part with combinations of four factors, one varied and three fixed : diameter of the nozzle (d), length of the injecting part (1), length of the mixing part (L) and diameter of the mixing part (D). Most suitable combinations were as follows :
(i) L=12mm to d=0.60 mmφ, D=1.6 mmφ, and l=1.8mm,
(ii) 1=1.8mm to d=0.60 mmφ, D=1.6 mnφ, and l=10mm,
(iii) D=1.6mmφ to d=0.60 mmφ, L=10 mm, and l=1.8mm,
(iv) d=0.60mmφ to D=1.6 mmφ, L=10 mm, and l=1.8mm.