Hydrostatic extrusion device for micro planar spring

Abstract

The invention discloses an extrusion molding device for a micro planar spring. The extrusion molding device comprises an extrusion rod, an extrusion barrel, a concave mold, a rubber thin film filled with a liquid, and a hydraulic device filled with a liquid, wherein the extrusion rod is arranged inside the extrusion barrel; a sealing structure is arranged between the extrusion rod and the barrel wall of the extrusion barrel; the rubber thin film is open, and the opening is fixed at the bottom of the extrusion rod or is sealed inside a cavity at the bottom of the extrusion rod; the concave mold is arranged at the outlet part of the extrusion barrel; the bottom of the extrusion barrel is connected with the hydraulic device; and the hydraulic device is arranged at the outlet part of the concave mold. According to the extrusion molding device, a long and thin extrusion rod can be avoided, and the problem that the extrusion rod is liable to break during the extrusion process is solved; the extrusion device adopts three-dimensional compressive stress, so that the plasticity of a material can be improved, and defects like cracks of the material during the extrusion process are decreased or avoided; and besides, through extrusion with three-dimensional compressive stress, the plastic material can be prepared into the micro planar spring through micro extrusion molding as well.

Description

technical field [0001] The invention relates to the field of preparation of miniature planar springs, in particular to a device for extrusion forming of miniature planar springs. Background technique [0002] Micro-forming processing technology is the basis for the realization of micro-electro-mechanical systems. It can manufacture components with extremely small dimensions, which are even difficult for human eyes to directly perceive. Most of the existing microplastic forming processes are on the sub-millimeter to sub-micron scale, which belongs to the category of macro-micro-mechanical to meso-micro-mechanical and from micro-fabrication to sub-micro-fabrication. fabrication) excessive. Micro-forming technology inherits the advantages of traditional plastic processing technology, such as good mechanical properties, high material utilization rate and high production efficiency. Various plastic processing methods such as extrusion, punching, bending and stretching can be use...

AI Technical Summary

Problems solved by technology

In the literature "Hong Xiangting. QA17 Copper Alloy Mini Plane Spring Cold Extrusion Forming Technology and Performance Research [D]. Nanjing University of Science and Technology, 2015." In the traditional extrusion, more extrusion rods need to be prepared, because the extrusion rods are easy to Damaged during the extrusion process, and during the extrusion process, due to the uneven deformation of the inner and outer metal layers, additional tensile stress will be generated, thereby causing cracks in the extruded parts

When using materials with general room temperature plasticity as raw materials, it is difficult to form at room temperature, and the extrusion temperature needs to be increased to successfully prepare parts, and cracking is very easy to occur

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