Electromagnetic repulsive force edge pressing method and device based on inertial confinement

Abstract

The invention discloses an electromagnetic repulsive force edge pressing method and device based on inertial confinement. The method comprises the steps that an edge pressing coil is discharged; the edge pressing coil is arranged on the upper portion of an edge pressing copper ring; the edge pressing copper ring is arranged on the upper portion of the edge of a workpiece; the workpiece is arranged on the upper portion of a female die; the to-be-deformed workpiece is molded through the female die, a pulsed magnet field is generated in the discharging process of the edge pressing coil, induced eddy current correspondingly generated in the edge pressing copper ring and the pulsed magnet field interact, and thus electromagnetic repulsive force is generated between the edge pressing coil and the edge pressing copper ring; and edge pressing force to the edge of the workpiece is provided by the electromagnetic repulsive force between the edge pressing coil and the edge pressing copper ring so that the edge positions of the workpiece can be kept stable in the molding process, meanwhile, workpiece material flowing is controlled, and the workpiece is prevented from being wrinkled and broken in the molding process. Through the electromagnetic repulsive force between two edge pressing coils of between the edge pressing coil and the edge pressing copper ring, the edge pressing force can be flexibly controlled, the device manufacturing cost is reduced, the space size is reduced, and the power source energy of a system can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of metal forming and manufacturing, and more specifically relates to an inertial constraint-based electromagnetic repulsion force blank-holding method and device. Background technique [0002] In the process of sheet metal stamping and forming, problems such as wrinkling, cracking or excessive springback of parts are often faced. In actual production, the method of applying blank holder force is usually used to control the material flow of the sheet metal. Its main function is to apply a certain pressure on the sheet material under the blank holder ring during the stamping forming process, so as to prevent the sheet material from excessively flowing into the mold cavity. Effectively reduce the occurrence of the above-mentioned forming defects. The selection of suitable blank holder force is very critical to the quality control of forming. The traditional blank-holding force is usually applied by a press to apply a c...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide an electromagnetic repulsion force blank-holding method and device based on inertial constraints, aiming to solve the problem that the existing electromagnetic blank-holding technology utilizes the attractive force between two electromagnets to provide blank-holding force due to the The strength of the magnetic field is limited. When the size of the plate is large, it cannot provide the required blank-holding force, and the attraction between the two coils is used to provide the blank-holding force. The manufacturing cost is high and the installation space is too large.

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