Multi-curvature forming method for stainless steel cylinder

Abstract

The invention discloses a multi-curvature forming method for a stainless steel cylinder. The method is characterized by comprising the following steps: performing scribing and blanking according to the developed length of the medium diameter of a cylinder to be wound; machining peripheral welding grooves of a plate; rolling-forming a first-curvature circular arc, namely reserving a straight section, not to be wound for the formation of a circular arc, with a width B of 200 to 600 mm at each of the two ends of the cylindrical plate, and bending and winding the middle part of the cylindrical plate into a large circular arc with a curvature radius R of more than or equal to 0.5 Phi to form the first-curvature circular arc of the cylinder; rolling-forming second-curvature circular arcs, namely rolling the parts between the roots of the straight sections with the widths B of 200 to 600 mm and the large circular arc into circular arcs with curvature radiuses r of 0.2 to 0.5 Phi to form second-curvature circular arcs; rolling transition parts between the second-curvature circular arcs and the first-curvature circular arc into smooth transition; performing rolling until the grooves 2 in the two ends of the straight sections get close to each other; performing longitudinal seam assembly and welding on the cylinder, placing the cylindrical body at a horizontal position, and welding longitudinal seams; performing roundness correction on the cylinder after welding.

Description

technical field [0001] The invention relates to the manufacture of stainless steel pressure vessels, especially the manufacture method of stainless steel cylinders. Background technique [0002] Stainless steel pressure vessels have developed rapidly in recent years, which has played a positive role in the upgrading of production technology and product quality in the fields of medicine, chemical industry, food, and beverages. [0003] Austenitic stainless steel is commonly used for stainless steel pressure vessels. This material has high ductility and allows large deformation during the forming process. However, due to its high hardness and obvious cold hardening characteristics, the deformation is too large and the number of strains is too high. Too much can cause breakage. Secondly, the defects such as scratches, pits, pits and heavy skin on the surface of stainless steel are amplified with the deformation of the sheet during the rolling process, and even directly lead to...

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Problems solved by technology

[0005] Aiming at the deficiencies of the existing technology, the present invention proposes a multi-curvature progressive forming method for stainless steel cylinders according to the cylinder rolling forming mechanism, in order to save materials, simplify the process, reduce deformation, and solve the problem of three-roll plate rolling machine rolling. The purpose of the technical problems of the stainless steel cylinder

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