A kind of necking processing preparation method of fiber-metal tube

Abstract

The invention discloses a fiber-metal tube necking processing preparation method, which relates to the field of material forming; it includes the steps of: (1) pre-treating an alloy plate and a carbon fiber cloth, stacking and then blanking, rolling and forming after blanking, Seamless welding to form circular pipe fittings; (2) Heating the fiber metal pipe fittings in step (1) and extruding them into the variable-diameter shrinking die, so that the pipes are extruded with each other under the action of the variable-diameter shrinking die to produce plastic deformation and fit tightly to obtain the necked composite pipe; (3) apply ultrasonic vibration around the necked composite pipe in step (2) to assist the plastic deformation of the pipe; (4) apply ultrasonic vibration in step (3), Apply air pressure inside the necked composite pipe and heat it; (5) Keep the temperature constant, then release the internal pressure, and finally take it out for air cooling to get the final product. The necking processing and preparation method of the fiber-metal pipe provided by the invention enables the pipe fitting to have high surface quality and good mechanical properties.

Description

technical field [0001] The invention relates to the technical field of material forming, in particular to a method for preparing a fiber-metal tube for necking. Background technique [0002] Currently, fiber-metal composite pipe fittings have two production methods. 1. First lay the aluminum alloy pipe and carbon fiber cloth alternately, and then solidify the target part by shrinking and bulging; 2. First, shape the aluminum alloy pipe into the shape of the target part, then lay the carbon fiber cloth and further solidify. In method 1, when the shrinkage coefficient is large, the aluminum alloy layer and the carbon fiber cloth layer are prone to normal instability due to the huge hoop compression, resulting in wrinkling and large springback defects; Poor and easy to break. In method 2, due to insufficient normal pressure, gaps are easily formed between the aluminum alloy layer and the carbon fiber layer, which further leads to cracks; at the same time, complex axis fiber-m...

AI Technical Summary

Problems solved by technology

In method 2, due to insufficient normal pressure, gaps are likely to occur between the aluminum alloy layer and the carbon fiber layer, which further leads to cracks; at the same time, fiber-metal composite pipe fittings with complex axes cannot be formed by this method

In addition, in the traditional process, the resin curing process of carbon fiber cloth is prone to defects such as filling dissatisfaction and gaps due to the lack of external energy field assistance; the curing process of carbon fiber cloth is separated from the aging treatment process of aluminum alloy, and the forming steps are many, time-consuming, and expensive. Low preparation efficiency

Therefore, the traditional preparation method of fiber-metal composite pipe fittings has problems such as complicated steps, low preparation efficiency, low interlayer interface strength, easy instability and wrinkling when shrinking, and large rebound value.

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