Electromagnetic force-based indirect micro-forming method and device for plate

Abstract

The invention relates to an electromagnetic force-based indirect micro-forming method and device for a plate, and is suitable for the technical field of micro-forming of plates. The method comprises the following steps: controlling an air pumping device to vacuumize the upper cavity of a micro mold and a concave pit by using a computer; controlling a coil to discharge by using a controller, wherein the metal plate is driven to move upwards along with an elastic medium above by using the electromagnetic force generated by discharging, a workpiece is extruded between the elastic medium and the micro mold to undergo plastic deformation, and the appearance of the micro mold can be copied in cooperation with the micro mold; driving the metal plate to return to an initial position after the workpiece is formed by using the rebounding force of the elastic medium, and replacing the workpiece to realize repeated batch production. The invention further discloses the device. The method and the device have the advantages of high forming efficiency, good forming quality and realization of low-cost batch production of micro devices.

Description

Technical field [0001] The invention relates to the technical field of micro-forming, in particular to a method and device for indirect micro-forming of a sheet based on electromagnetic force driving. Background technique [0002] With the rapid development of industrial technology, more and more micro-device products with light, thin, short, small and multi-functional characteristics are widely used in aerospace, precision instruments, biological and medical equipment, telecommunications and electronics, and national defense. In the field, the processing technology of related metal micro-device products is also becoming more and more important, which has promoted the rapid development of metal micro-forming technology. The so-called micro-forming here refers to the size of parts obtained by plastic deformation of materials at least A technology that reaches the order of millimeters in two dimensions. [0003] The existing micro-machining technology for forming micro-components is...

AI Technical Summary

Problems solved by technology

Such as patent CN101406913A proposes a kind of electromagnetic forming device of sheet metal, although the magnetic field distribution is relatively uniform, sheet metal produces uniform forming force, and forming quality is better, but it is only suitable for the forming of sheet metal with good conductivity; Patent CN102259132A proposes a The forming method and equipment of the molded plate driven by electromagnetic force, using the electromagnetic force to drive the steel mold to realize the rapid deformation of the plate at a high rate, and obtain the ultra-fine grain plate without changing the shape and size of the plate, the forming process is relatively complicated, and it needs to go through multiple bending , and the sheet can only be a metal material, and it involves the forming of a block plate, and does not involve the micro-forming of the sheet; the patent CN101590501A discloses a warm electromagnetic forming method for a magnesium alloy sheet. The instantaneous discharge of the electromagnetic forming coil generates a strong pulsed magnetic field, so that the heated blank is formed at high speed under the action of the impact electromagnetic force. Although the forming efficiency is high, it is directly formed under the action of the electromagnetic force, which cannot guarantee the uniformity of the electromagnetic force, and then cannot be determined. The forming quality of the formed workpiece; the patent CN102248693A proposes an electromagnetic-driven forming method and device, which uses pulsed electromagnetic force to drive the punch to accelerate, and the punch hits the workpiece to complete the die-attachment between the workpiece and the die. The metal foil plate forming efficiency of this forming device High, but the punch is rigid, and the rigid punch will scratch the workpiece and affect the forming quality of the workpiece

[0005] It can be seen from the above that people have begun to apply electromagnetic forming to plastic forming, but there are still problems such as low efficiency, poor quality of formed parts, and only suitable for materials with good conductivity.

Images