ArticleName |
Development of Machine Parts Production Processes for a Plate Mill |
Abstract |
Nosov Magnitogorsk State Technical University, in cooperation with ChermetInformSistemy LLC, have developed a new technological package for the production of bulky parts with curved surfaces on a plate mill. The package comprises combined processes, such as asymmetric rolling and bending and plate mill rolling and stamping. The advantages delivered by the new package include considerably reduced processing force requirements (at least a double reduction), on the one hand, and a possibility to produce long-length bulky parts without welding, on the other hand. Product dimensions: wall (plate) thickness — 40–120 mm; diameter (width) — up to 4,350 mm. The authors built a mathematical model and analyzed the deformation pattern and the force parameters of the rolling-stamping process. Methods were developed for experimental study of the combined rolling-stamping process. The authors verifi ed the adequacy of the mathematical model and test ran the new combined process on a laboratory rolling mill. A comparative analysis of strengths was performed, and drawbacks were identifi ed of the direct and reverse rollingstamping process used to produce parts with curved surfaces. The authors established what dimensions would be adequate for dies and punches in order to produce spherical and elliptical bottoms of diff erent thicknesses and diameters. New practical solutions are proposed that would ensure stability of the package during deformation and maintain a good alignment between its elements. The studies were carried out within the framework of the RFBR grant (contract No. 18-58-45013 / 18 dated 07/10/2018). |
References |
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