Direct Resistance Heating of Aluminum Sheets for Rapid Superplastic Forming

Superplastic aluminum forming is a promising manufacturing process for the transportation industry because it allows for the manufacturing of complex body parts from a single sheet of aluminum, reducing the number of pieces and the weight of vehicles. However, the process is still limited, among oth...

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Published in:Engineering proceedings 2023-01, Vol.43 (1), p.40
Main Authors: Valentin Maynard, Alexandre Landry-Blais, Dany Francoeur, Nicolas Bombardier, Alain Chapdelaine, Mathieu Picard
Format: Article
Language:English
Subjects:
aluminum
direct resistance heating
superplastic forming
Thermoforming
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Alexandre Landry-Blais
Dany Francoeur
Nicolas Bombardier
Alain Chapdelaine
Mathieu Picard
description Superplastic aluminum forming is a promising manufacturing process for the transportation industry because it allows for the manufacturing of complex body parts from a single sheet of aluminum, reducing the number of pieces and the weight of vehicles. However, the process is still limited, among other things, by the low heating rate of the sheets. Indeed, for the 5000 series aluminum alloy, a temperature between 450 and 550 °C must be reached, but the furnaces used are inefficient, leading to heating times in the order of ~3 to 6 min. A test bench has been developed to evaluate direct resistance heating as a solution. It allows heating 350 × 200 × 1 mm sheets. The uniformity of the sheet’s temperature is an important factor in ensuring good formability and has been evaluated using an infrared camera. Tests show that the sheets can be heated within 20 s using a current of 6200 A, with a standard deviation of about 10 °C over the surface of the sheet.
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subjects aluminum
direct resistance heating
superplastic forming
Thermoforming
title Direct Resistance Heating of Aluminum Sheets for Rapid Superplastic Forming
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