Fabrication Process of Metal Sandwich Panel Embedded with Damping Film

Abstract

The invention discloses a manufacturing technology of a metal interlayer plate in which a damping film is embedded. The manufacturing technology includes the steps that firstly, a metal interlayer plate structure in which the damping film is embedded is designed; secondly, the damping film is manufactured; thirdly, metal plates and the damping film are laid according to the design requirement; fourthly, technological parameters of a spot welder are adjusted, a proper spot welding technology mold is designed and manufactured, a damping film layer between the metal plates becomes thin through pressure of welding points, the thinned position of the damping film layer is punctured under the action of an external electric field, a discharging channel is generated, local high temperature is formed, the thinned damping film portion will be firstly combusted and gasified, a gap between metal layers at the thinned position of the damping layer becomes small, a local discharging channel is formed, and local metal between layer interfaces is melted together under the action of pressure and high temperature; fifthly, the damping metal interlayer plate is formed after spot welding machining and cooling. A foundation is laid for research of the design theory of an orthotropic damping structure and wide application of the metal interlayer plate structure in which the damping film is embedded.

Description

technical field [0001] The present invention is in the cross-research field of vibration and noise control and functional materials, especially a new process of friction welding and / or spot welding to make a metal sandwich plate structure embedded with a damping film. Background technique [0002] Traditional metal materials and structures can no longer meet the design requirements of high stiffness and large damping performance of aircraft. A new damping embedded structure is formed by embedding the damping film between the metal sheets. It proposes a new structure with high damping, vibration and noise reduction performance on the basis of maintaining the mechanical properties of the traditional metal sheet. It is a kind of combination of two or more A multiphase solid material in which materials of different properties are bonded together by welding points or welding lines. From its composition and structure analysis, one of the phases is continuous in the layer called th...

AI Technical Summary

Problems solved by technology

However, this structure is limited to the production of resin-based composite materials. For metal plates, to improve the damping performance of its components, usually only passive damping methods can be used, including free damping structures, constrained damping structures and damping insertion structures. These three methods They all belong to post-processing, and are often limited by many factors such as structural size, space and weight, and are prone to peeling and falling off during use.

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