| 摘要 |
532,422. Annealing steel. LINDE AIR PRODUCTS CO. Aug. 30, 1939, No. 24861. Convention date, Dec. 3, 1938. [Class 72]. [Also in Group XXII] Steel members such as rails, I or channel beams, pipes, rods &c. the members, after butt welding by high temperature gas flames, simultaneously applied to all portions of the members adjacent the abutting ends and reciprocated longitudinally across the ends to heat them to welding temperature, and by pressure continuously applied to upset the metal at all points round the joints, and removal of the upset metal from the sides and top of the head and the sides of the base by gas flames preferably while the work is still hot from the welding operation or after previous heating by a blowpipe, are annealed by heating to 900‹C. Annealing is effected by a set of burners carried on a carriage 411, Fig. 17, reciprocated across the joint by a hand operated rack 419 and pinion 417 or hydraulically. The burners are similar to the welding burners 311, 313, 315, 317, Fig. 7, which are carried by a carriage 151, the burners 313, 315 being provided with series of staggered rows of parallel and divergent tips for heating the sides of the rails and the burners 311, 317 having two rows of staggered tips of larger size than the tips for burners 313, 315, for heating respectively the top of the head and the underside of the base, the nozzles all being water cooled. The burners 33, 315 are vertically adjustable in collars 191 in slides 195, 193 which may be independently adjusted by screws 211, 213 in slides 199, 197, which may be simultaneously adjusted by a right and left handed screw 201. The burners 311 and 317 are vertically adjustable in collars 164 by racks 165, 167 and pinions in shafts 173, 175. The burner 317 is further supported by a bar 189 connected to a rod 185 carrying a rack 183 operated by a pinion 181 in the shaft 173. |
