Micro plastic forming device and forming method of laser-driven flying plate heat insulating film

Abstract

The invention discloses a micro plastic forming device and a forming method of a laser-driven flying plate heat insulating film. The device comprises a constraint layer, a flying plate, a mold, a foil plate, a flying cavity and a heat insulating soft film, wherein the flying plate is attached to the lower surface of the constraint layer; the mold comprises heating units; the foil plate is arranged on the upper surface of the mold; the flying cavity is arranged between the constraint layer and the foil plate; the heat insulating soft film is also arranged between the foil plate and the flying cavity. The high-speed flying plate can be prevented from coming into direct contact with a workpiece so as not to become invalid; the oxidation effect of the foil plate during heating can be effectively reduced; since the soft film has extremely high elasticity, the filming capacity of the workpiece is favorably improved; a lot of researches show that the metal material has a certain softening effect during heating in the field of macro forming and is meanwhile suitable for the field of micro forming; the non-uniform deformation caused by the size effect can be effectively reduced due to the raised forming temperature in the micro plastic forming process, so that the forming performance is improved.

Description

technical field [0001] The invention relates to a micro-forming device and a forming method thereof, in particular to a laser-driven micro-plastic forming device and a forming method of a heat-insulating film of a flying sheet. Background technique [0002] In the field of rapid prototyping of laser-driven flyers, the formed parts are generally small in size, and a significant size effect will appear when the thickness is below 1mm. This effect will affect the formability of the material: metal materials with sub-millimeter thickness often have only a few layers or one layer of grains in the thickness direction, and metal workpieces have serious deformation inhomogeneity during high-speed deformation. The local deformation of the formed part is serious, and even failure phenomena such as cracking occur. Most of the existing technologies focus on forming at room temperature, and have not yet involved laser-based rapid microplastic microplastic forming. [0003] The applicat...

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Problems solved by technology

[0004] Although the contents of the above three patents all mention the soft film, they all focus on the method or device for improving the forming ability of the workpiece under the direct or indirect action of the laser (driving the flyer) at room temperature. The first patent does not mention the specific elastic body. Materials, the latter two patents use polyurethane rubber as the elastomer, but due to the low melting point of rubber, it is not suitable for the field of microplastic forming

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