Magnetorheological composite soft mold and sheet forming method based on magnetorheological composite soft mold

Abstract

The invention relates to a magneto-rheological composite soft mold and a plate forming method based on the same. The magneto-rheological composite soft mold comprises a soft mold matrix constituted byI-type magneto-rheological elastic materials, and one or more II-type magneto-rheological elastic units or one or more magneto-rheological visco-plastic units are packaged at the predetermined position in the soft mold matrix; the II-type magneto-rheological elastic units are constituted by II-type magneto-rheological elastic materials; the magneto-rheological visco-plastic units are constitutedby magneto-rheological visco-plastic materials; and in an applied magnetic field, the pressure response characteristics of the I-type magneto-rheological elastic materials, the II-type magneto-rheological elastic materials and the magneto-rheological visco-plastic materials are different. The magneto-rheological composite soft mold is used as a plate forming force-transmitting medium, full fillingof plate local complex structural characteristics can be promoted, the forming defects are avoided, and the problem that an existing magneto-rheological elastomer soft mold cannot achieve local differential pressure distribution is effectively solved.

Description

technical field [0001] The invention relates to a magnetorheological composite soft mold and a plate forming method based on the magnetorheological composite soft mold, belonging to the technical field of plate forming. Background technique [0002] Thin-walled shell parts with complex shapes, such as aero-engine heat shields, hollow blades, special-shaped nozzles, etc., can realize special part functions, improve the lightweight level of equipment, and improve equipment performance. Due to the comprehensive consideration of assembly position, weight reduction, aerodynamics and other factors, such thin-walled shell parts with complex shapes have structural characteristics such as thin walls, non-rotation, and local curvature mutations, which increase the stress in the sheet forming process. Control difficulty. [0003] If such parts are formed by stamping in pieces and combined welding, there will be problems such as difficult positioning, thermal deformation of welding, an...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a magnetorheological composite soft mold, which is used to solve the problem that the existing magnetorheological elastomer soft mold cannot realize local differential pressure distribution. The sheet forming method of the soft mold is used to solve the problem that the existing magnetorheological elastomer soft mold forming method cannot form and process the sheet parts with local differences in structure

[0009] In order to solve the problem that the existing magnetorheological elastomer soft mold cannot realize local differential pressure distribution, the present invention provides a magnetorheological composite soft mold, including a soft mold base composed of type I magnetorheological elastic material, Encapsulate at least one type II magnetorheological elastic unit or at least one magnetorheological viscoplastic unit at a predetermined position in the soft mold base; the type II magnetorheological elastic unit is composed of type II magnetorheological elastic material; The magnetorheological viscoplastic unit is composed of magnetorheological viscoplastic materials; under an external magnetic field, the pressure response characteristics of the type I magnetorheological elastic materials are different from those of type II magnetorheological elastic materials and magnetorheological viscoplastic materials

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