液压胀形工艺是液体受压时,体积不变而压力向各方向均匀传递,使材料在最有利的情况下沿模具变形,达到成形的目的。胀形时材料处于双向拉应力状态,塑性变形仅局限于变形区范围内,因此,变形区材料不会产生失稳或起皱现象。采用液压胀形的零件具有表面光洁度高,几 Hydraulic bulging process is the liquid pressure, the same volume and pressure to the uniform transmission in all directions, the material deformation along the mold in the most favorable circumstances, to achieve the purpose of forming. When bulging, the material is in biaxial tension state, and the plastic deformation is only limited to the deformation area. Therefore, the material in the deformation area will not cause instability or wrinkling. The use of hydraulic bulging parts with a high surface finish, a few