结合塑性屈曲理论,对挤压成形屈曲产生机理进行了研究;以临界应力估算式作为屈曲载荷的判定公式,提出了挤出型材稳定的条件。型材的壁厚越大,型材壁面的宽度越小时,对应壁面的稳定临界载荷越大。 Combined with the theory of plastic buckling, the buckling mechanism of extrusion was studied. The critical stress estimation formula was taken as the judgment formula of buckling load, and the condition of extrusion profile stability was put forward. The larger the thickness of the profile, the smaller the width of the profile wall, the greater the critical stability load of the corresponding wall.