The non-uniform deforming characteristics of extruded piecework have been exposed.It is compared the extrusion process in one-hole die with in two-hole die.It is found ...

• 并与单孔模型材挤压过程进行了比较,发现双孔模[1]挤压时,变形体内存在两个互为相反方向的涡流场,它们相互抵消,从而可以消除型材挤压过程中产生的扭拧、波浪、弯曲等缺陷。