DEVICE FOR HEATING OF BLANKS BEFORE STAMPING Russian patent published in 1995 - IPC

FIELD: metallurgy. SUBSTANCE: device uses two pipes (walls) of round (or square) section inserted in each other and having different diameters or profile, and side walls welded to the pipe ends providing an enclosed space between the pipes. A great number of holes are drilled over the whole surface of the internal pipe (wall), they are used for outlet of gaseous mixture turning into flame. Two pipelines with gas and air run to the pipelines with water run over the interval pipe (wall), they serve as guide supports for blanks. Gas and air are fed through pipelines to the torch interior, where they are mixed and heated by the internal pipe (wall). The heated mixture through a network of small holes in the internal pipe (wall) is fed to the heating, gets inflamed their and burns on the blank surface. EFFECT: facilitated procedure of blanks heating. 2 dwg