Method for feeding material and group soldering macrotype torpedo tank

Abstract

The invention relates to a large torpedo ladle blanking and assembly welding method, belonging to the technical field of molding, assembly and welding of smelting equipments, comprising the steps as follows: the blanking and molding of a ladle body and a ladle mouth, the use of a feasible positioner and a fixture to guarantee the assembly precision of a large cylinder and a trunnion, the making of the torpedo ladle welding craft; analyzing the weldability of the steel, choosing a plurality of welding materials and craft parameter, choosing the a low hydrogen type welding rod for tack welding, choosing mixed gas for protection welding, using the narrow track multi-layer welding, and before welding the cylinder and the trunnion, firstly a groove and the welding area are grinded and leaned by a polisher. After butt-mounted, the manual arc tack welding is used; the groove surface is checked by magnetic powder, which is qualified if none of drawback is checked out; the steel plate and the trunnion welding area are preheated evenly; before tack welding, the low hydrogen type welding rod is dried, then the symmetric tack welding is processed, and the interlaminar stress is eliminated by side welding; after the welding, the heat insulation is processed to cool slowly; the weld joint is checked by ultrasonic inspection, and the T-shaped joint is processed by RT checking. The invention has the advantages that the butt-mounted gap dimension of the cylinder and the trunnion is matched to the process requirements, and the coaxiality of the trunnion is less than 1 mm.

Description

technical field [0001] The invention relates to the technical field of forming, assembling and welding of smelting equipment, in particular to a large-scale torpedo tank blanking and assembly welding method. Background technique [0002] The large torpedo tank is one of the main spare parts of the large blast furnace mixed iron car. It is mainly used to transport blast furnace molten iron to steelmaking plants, iron foundries and foundries for steelmaking, cast iron blocks and pouring ingot molds, and can also be used for short-term storage of molten iron to coordinate the temporary imbalance between steelmaking and ironmaking. Three removal treatments (desulfurization, dephosphorization, and desiliconization) can also be carried out if necessary. A single group of 320-ton torpedo tanks is 50566Kg, with a total length of 14918mm and a diameter of 3700mm. The tank shell is welded with steel plates. Two cast steel trunnions are welded at both ends of the tank shell, and the t...

AI Technical Summary

Problems solved by technology

And because the trunnion has been finished, it is difficult to guarantee the above requirements after welding

The blanking of the tank body and the tank mouth is calculated and unfolded by computer, cut by a CNC automatic cutting machine, and the tank body is rolled and formed by a plate rolling machine, but the thickness of the tank mouth is 80mm, 20G steel plate, the diameter of the can mouth Small, all equipment cannot be roll formed

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