Complex multi-boss box-shaped titanium alloy sheet metal part forming process method

The invention discloses a process method for forming a complex multi-boss box-shaped titanium alloy sheet metal part, which can ensure the primary forming of a forming surface of a titanium alloy part and is favorable for positioning the position and the shape of a boss on the titanium alloy part by carrying out primary hot-press forming on a titanium alloy blank. Then, a flexible cushion layer is laid on the forming face of the titanium alloy part, and hot-pressing clearance compensation is conducted on the forming face of the titanium alloy part through the flexible cushion layer; the problem that raised grains or wrinkles are easily generated on the forming surface of a titanium alloy part in a conventional hot pressing mode due to die machining precision errors, die use loss and thin titanium alloy plate materials can be solved. 本发明公开了一种复杂多凸台盒形钛合金钣金件成形工艺方法，通过对钛合金坯料进行初步热压成形，能够保证钛合金零件的成形面初步成形，并利于定位钛合金零件上的凸台的位置和形状。然后通过在钛合金零件的成形面上铺设柔性垫层，通过柔性垫层对钛合金零件的成形面进行热压间隙补偿，能够解决因模具加工精度误差、模具使用损耗、钛合金板料较薄造成钛合金零件在常规热压方式下容易出现成