厚板U形弯曲应用广泛。弯曲成形工艺复杂,易出现工件开裂等缺陷。采用切口工艺是解决这些缺陷的方法之一。采用有限元模拟及工艺实验的方法,重点研究了中厚板U形弯曲采用切口工艺的条件以及其切口工艺成形的具体特点。得出了中厚板U形弯曲采用切口工艺的条件,大大提高了工艺制定的效率。 Slab U-shaped bending widely used. Bending forming process is complex, prone to defects such as workpiece cracking. Cutting technology is one of the ways to solve these shortcomings. The finite element simulation and process experiment are used to study the conditions of the incision process of the U-shaped plate bending and the specific features of the incision process. The condition of incision process of U-shaped plate was obtained, which greatly enhanced the efficiency of process formulation.