A Composite Bellows Based on Electromagnetic Forming Technology and Its Forming Device

Abstract

The invention discloses a composite corrugated pipe forming device based on electromagnetic forming. The composite corrugated pipe forming device is characterized by comprising a rectifier (1), a resistor (2), a switch (3), a capacitor (4), a boosting transformer (5), an upper fixing plate (6), a fixing bolt (7), a pressing block (8), a die rack (9), a constraint die (11), a coil (12), a lower fixing plate (13), a T-shaped platform (14), a trapezoid hole (15), a vent hole (16), a fixing groove (17) and a wire hole (18). The composite corrugated pipe forming device has the advantages that the device is few in machining procedures, high in machining efficiency, high in forming precision, fast in pipe fitting forming, and capable of forming pipe fittings under high strain rate; due to high strain deformation, the device is applicable to forming of metal materials which are difficult to deform by conventional methods, plasticity of the metal materials is increased greatly, and yield strength of the materials is increased greatly; different corrugations can be formed by changing the shape of the constraint die, and high machining flexibility is achieved.

Description

technical field [0001] The invention relates to a metal composite bellows forming technology, in particular to an energy-absorbing composite bellows based on the principle of electromagnetic forming and a forming device thereof. Background technique [0002] Electromagnetic forming is a high-energy, high-speed forming technology that uses the plastic deformation of metals under the action of electromagnetic force in a strong pulsed magnetic field. Electromagnetic forming has the ability to improve the plastic deformation of materials, and magnetic pulse forming uses magnetic force instead of mechanical force to process metals, so no force transmission medium is required during the forming process, the forming process is stable, the production efficiency is high, and the energy Easy to control. Generally, electromagnetic forming requires the resistivity of the workpiece to be lower than 0.15μΩ·m, which is very suitable for the processing of highly conductive materials such a...

AI Technical Summary

Problems solved by technology

[0004] Generally, metal thin-walled corrugated pipes are made of a single metal material, and a single type of metal thin-walled round pipe cannot well meet the requirements of use. For example, a single aluminum alloy pipe has low strength and poor energy absorption effect, and a single high-strength steel pipe The mass is too large to meet the lightweight requirements

The manufacturing process of the existing metal composite pipe is complicated, and the assembly and layout of the pipe fittings require many

For example, in the manufacturing method of composite pipe in patent application 201210495953.0, the outer pipe is heated, the inner pipe runs through the guide pipe, and then formed by hydraulic pressure. The manufacturing process of the metal composite pipe is complicated and the forming conditions are high.

The processing and manufacturing of corrugated pipes in the prior art usually adopts hydroforming, roll forming, mechanical bulging, welding forming, etc., the forming efficiency is low and the process is complicated

For example, in the manufacturing method of the metal bellows in the patent application 201210595118.X, the pipe fittings are heated first, and then liquid is filled into the pipe fittings for expansion. The processing conditions required are high and the working conditions are complicated.

For example, in the manufacturing method of metal bellows in Chinese patent application 200710302010.0, pressure is first applied on the inner side of the pipe to make it bulge and form a concertina-shaped protrusion, and then the corrugated tube is formed by rolling. The processing process is complicated and cannot be formed at one time.

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