PERFORMANCE OF WARM DEEP DRAWING PROCESS FOR AA1050 CYLINDRICAL CUPS WITH AND WITHOUT BLANK HOLDING FORCE

A.Chennakesava Reddy

Volume : IV, Issue : X, October - 2015

PERFORMANCE OF WARM DEEP DRAWING PROCESS FOR AA1050 CYLINDRICAL CUPS WITH AND WITHOUT BLANK HOLDING FORCE

A. Chennakesava Reddy

Abstract :

In this paper, a statistical approach based on Taguchi techniques and finite element analysis have been adopted to determine the performance of the warm deep drawing process for AA1050 cylindrical cups drawn with and without the blank holding force. The maximum forming loads without and with the BHF, respectively are found to decrease from 1.1KN to 0.47KN and 1.5KN to 0.6KN over the working temperature range 3000 CT<5000C. No wrinkles are found till the strain reached 0.5 and 1.2 without and with the BHF respectively. The coefficient of friction all by itself contributes 87.86% of the total variation in the height of the cup drawn with BHF. The cups are drawn to the designed height (75 mm) of cup without BHF and surface expansion ratio greater than 2.0. The height of the cup drawn with the BHF is not only depended on the surface expansion ratio but also on the coefficient of friction. For the successful drawn cups, the coefficient of friction is 0.1.