Wrinkling and fracture are the major defects in sheet metal forming, and the blank-holder force(BHF) is an important technologic parameter controlling the forming of sheet metal.
在板材成形中，起皱和拉裂是主要缺陷，而压边力是控制板材成形的重要工艺参数。
2
The equipment has simple structure, is economical and practical and with variable blank holder force. High-quality complex sheet parts can be produced with this equipment.
该装备具有结构简单、经济实用、可实现变压边力控制等特点，可获得高质量的复杂板料成形件。
3
The predominant failure modes in stamping of sheet metal parts are wrinkling and fracture. In general, these defects may be eliminated by appropriately manipulating the Blank-Holder Forces.