Electromagnetic pulse based air-assist thermal forming device and forming method for light-alloy pipe fittings

Abstract

An electromagnetic pulse based air-assist thermal forming device and a forming method for light-alloy pipe fittings belongs to the field of metal material machining and forming, and aim to solve the problem that an existing electromagnetic pulse based light-alloy pipe fitting forming method is prone to causing unevenness of formed pipe fittings and only applicable to high-electric-conductivity blanks and low-electric-conductivity mould. The electromagnetic pulse based air-assisted thermal forming device is characterized in that a pipe fitting is fixedly arranged in a combined mould unit, a high-voltage pulse generating subunit and a plane coil form an electric loop, a compressing unit squeezes air stored in a high-pressure air storage unit into the pipe fitting under an action of electromagnetic force generated by the plane coil, and a temperature-controllable heating unit is used for heating the pipe fitting. The forming method includes that through the temperature-controllable heating unit, the pipe fitting is heated to a preset temperature, through a high-pressure air generating unit, air pressure in the high-pressure air storage unit and the pipe fitting is raised to a preset value, and through an electromagnetic pulse generating unit and the compressing unit, the air in the high-pressure air storage unit is squeezed into the pipe fitting, and the steps are repeated until the pipe fitting fits a forming cavity of the mould.

Description

Technical field [0001] The invention relates to a light alloy pipe forming device and a forming method, belonging to the field of metal material processing and forming. Background technique [0002] The existing light alloy tube forming method based on electromagnetic pulse mainly has the following four problems: [0003] 1. Since the electromagnetic force generated by the coil directly acts on the light alloy pipe fittings to be formed, the pipe fittings are prone to be unevenly formed due to uneven forces; [0004] 2. The existing light alloy tube forming method based on electromagnetic pulse adopts a solenoid coil, which needs to match the size of the light alloy tube to be formed. Therefore, whenever processing light alloy pipes of different sizes, it is necessary to manufacture solenoid coils of corresponding sizes, which increases the forming process and manufacturing costs; [0005] 3. The existing light alloy pipe fittings forming method based on electromagnetic pulse is only...

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Problems solved by technology

Therefore, whenever light alloy pipes of different sizes are processed, solenoid coils of corresponding sizes need to be produced, which increases the forming process and production cost;

[0005] 3. The existing light alloy pipe fittings forming method based on electromagnetic pulse is only suitable for light alloy pipe fittings with high conductivity;

[0006] 4. The existing light alloy pipe fittings forming method based on electromagnetic pulse can only use forming molds made of low-conductivity materials, which has certain limitations in implementation

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