Sheet Metal Forming: Fundamentals
Chapter 13: Cushion Systems for Sheet Metal Forming
This chapter describes the various types of cushion systems used in forming presses and their effect on part quality. It begins with a review of the deep drawing process, explaining that wrinkling, tearing, and fracture are the result of excess or insufficient material flow, which can be prevented by maintaining the correct amount of holding force on the periphery of the blank. It then describes how blank holding force is generated in double-action presses and the extent to which displacement profiles can be adjusted on both the inner and outer slides. The discussion then turns to single-action presses that...
Hari Palaniswamy, Lars Penter, Cushion Systems for Sheet Metal Forming, Sheet Metal Forming: Fundamentals, Edited By Taylan Altan, A. Erman Tekkaya, ASM International, 2012, p 203–220, https://doi.org/10.31399/asm.tb.smff.t53400203
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