A Forming Method of Complex Curved Aluminum Foam Parts

A technology of complex curved surfaces and forming methods, applied in the field of forming aluminum foam parts with complex curved surfaces, can solve the problems that the aluminum foam sandwich panels cannot meet the requirements of daily automobile use, differences in internal cells, differences in mechanical parameters, etc., and achieve a foam-free structure. Defects, low cost, suitable cell distribution effect

Active Publication Date: 2021-02-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Simple aluminum foam sandwich panels cannot meet the requirements of daily automobile use, and various complex curved panels that meet the requirements must be obtained through forming technology
At present, there are not many methods for preparing complex curved panels. Basically, traditional stamping and forming production lines are used to obtain ideal products. However, different panels obtained through traditional stamping have differences in internal cells and mechanical parameters, resulting in uncontrollable Various mechanical defects

Method used

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  • A Forming Method of Complex Curved Aluminum Foam Parts
  • A Forming Method of Complex Curved Aluminum Foam Parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] S1. Friction stir welding stage: use the metal plate 1 to perform friction stir processing on the friction stir welding workbench to obtain the foamed aluminum prefabricated body 2;

[0035] S2. Preparatory stage before stamping: Put the aluminum foam preform prepared in S1 into a heating furnace to heat to 500°C and keep it warm for 10 minutes. After the heating is completed, the heated preform is quickly transferred to the punch 3 and the die 7 for positioning Clamping, the transfer time is kept at about 10s;

[0036] S3. Stamping deformation stage: quickly close the punch 3 and the die 7 of the mold to stamp the preform to an ideal shape;

[0037] S4. Foaming stage: After the mold is quickly closed for stamping, the punch is moved up by 5mm to give the heated preform 5 foaming space, so that the deformed preform can complete the remaining foaming operation;

[0038] S5. Heat preservation stage: continue to heat the mold to complete the remaining foaming action of th...

Embodiment 2

[0042] The specific method is the same as in Example 1, and the different process conditions are as follows: when the foaming is heated at the beginning, the foamed aluminum preform is directly placed in the mold for heating, which saves the time wasted in transferring the preform from the heating furnace to the mold. , the follow-up temperature and pressure holding time are the same.

[0043] The final porosity of the foamed aluminum product obtained in Example 2 is about 70%.

[0044] The present invention can not only form molded parts with almost any desired curved surface, but also the whole process does not last long, consumes simple equipment, and is easy to operate as a whole, which can greatly improve the efficiency of producing complex curved surface parts and effectively reduce costs.

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Abstract

The invention discloses a method for forming a foamed aluminum part with a complex curved surface. The foaming agent and stabilizer are evenly distributed between the metal plates, and the two stacked metal plates are welded for multiple times by friction stir welding to obtain a foamed aluminum prefabricated body; S3. Provide a heating mechanism or use a stamping die for heating The component heats and insulates the foamed aluminum prefabricated body in S2; S4, transfers the heated foamed aluminum prefabricated body to the stamping mold, closes the mold, stamps the foamed aluminum prefabricated body, opens the mold, and moves the punch to make a distance The concave mold is at a certain distance, and the heating component is started to heat the aluminum foam prefabricated body, so that it can complete the remaining foaming action, and the aluminum foam parts with complex curved surfaces can be obtained. The invention not only can mold any desired curved surface molded parts, but also has short duration and low cost of the whole process.

Description

technical field [0001] The invention specifically relates to a forming method of a foamed aluminum part with a complex curved surface, which uses friction stir welding as a solid phase connection to prepare a foamed aluminum part with a complex curved surface. Background technique [0002] As the lightweight development of automobiles is becoming more and more widespread, aluminum foam has gradually become one of the various lightweight materials with unique advantages. Aluminum foam has a unique pore structure that other lightweight materials do not have, and has many advantages such as low relative density, high specific strength, excellent mechanical response and good energy recovery ability, so it can be used in various parts of the vehicle that are vulnerable to impact. parts. [0003] Simple aluminum foam sandwich panels cannot meet the requirements of daily automobile use, and various complex curved panels that meet the requirements must be obtained through forming t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 华林宋锦书胡志力庞秋
Owner WUHAN UNIV OF TECH
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