JPS6438509A - Method of machining burner - Google Patents

Abstract

PURPOSE:To uniformly disperse a surplus wall thickness generated by driving swollen parts over the entire surface of a burner port thereby to prevent the burner from buckling by slightly bending the burner port surface to the inward of the burner in the latitudinal direction thereof and thereafter rectangularly bending both side surfaces with respect to the burner port surface. CONSTITUTION:A metal die B is brought into contact with the inner side of a burner port surface 1 to bend both side surfaces 2 and 2 thereof into a substantial U-shape, and the metal die B is drawn out at a position where the inside protrusion ends abut against the side surface of the metal die B. Further, both side surfaces 2 and 2 are bent until they become flat, and outer peripheral parts are brought into contact with each other and joined. The ends of respective side surface 2 and 2 continuous to long side edges 1b and 1b of the burner port surface 1 are swollen outward of the burners. Swollen part 2' and 2' are driven into the inside of the burner so as to be formed into a planar shape. Surplus wall thickness generated by driving of the swollen parts 2' and 2', fully circulate in the bending direction of the burner port surface 1, whereby the wall thickness is uniformly dispersed over the entire burner port surface 1.