Die structure based on the process of forming small fillet radius is introduced, and deduced the formula according to the principle of volume invariably.
介绍形成小圆角半径的圆孔翻边模具的结构特点，按体积不变的原则，推导了计算公式。
2
With an aim to solve the long-term existing problem of the cracks in flow-front during thixo-forging, a new theory of constant volume flux of slurry was put forward in optimizing die design.
On condition that plastic melt volume undergoes a uniform change, the authors analyse the internal shape of pipe die and produce an optimum shape curve.