METHOD FOR MANUFACTURING AN ALUMINUM WROUGHT ALLOY CASING Russian patent published in 2022 - IPC C22F1/04 F28F9/18 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering, and in particular to methods for processing welded thin-walled parts made from deformable materials. A method for manufacturing a housing from a wrought aluminum alloy includes manufacturing a housing consisting of a cover, a shell and a support in four stages: at the first stage, a cover, a shell and a support are made, at the same time, the cover is made in the form of an elliptical cylinder, turning into a flattened hemisphere by cutting a blank from a metal sheet 1.3-3 mm thick, making the contour of the part using a stamp, hardening at 470-490°C, 15-30 min and cooling at 15- 40°C, 30-60 min, stretching with simultaneous molding of a hemisphere, the shell is made by cutting a rectangular part 1.3-3 mm thick from a metal sheet, quenching at 470-490°C, 15-20 min and cooling at 15- 40°C, 30-60 min, at the same time, no later than six hours from the beginning of hardening, the part is bent, the edges of which are welded to form an elliptical cylinder, then straightening is carried out for welding, the support is made by cutting a workpiece from an aluminum alloy plate 31-40 mm thick, annealing at 390-450°C, 1-2 hours, and cooling in two stages: in an oven to 190-210°C at a speed of no more than 30°C/h and indoors at 15-40°C, 30-60 min, forming a rectangular support with a through a window in the form of an ellipse, on the surface of which there is a hollow elliptical cylinder 1.3-3 mm thick, the inner diameter of which is greater than the diameter of the elliptical window coaxial to it; at the second stage, the casing is made by welding together the cover, the shell and the support with the final formation of the casing geometry; at the third stage, the casing is hardened at 470-490°C, 40-50 min with cooling at 15-40°C, 30-60 min; at the fourth stage, stepwise aging is carried out first at 100-120°C, 10 hours, then at 170-175°C, 5 hours, with cooling at 15-40°C for at least 60-90 minutes.

EFFECT: invention is aimed at improving the quality of products by reducing internal strain stresses.

2 cl, 2 dwg