At the same time design variables, such as cutting head diameter, cutting first hand tap corner, rise angle of the helical blade, and so on, and subjection functions are discussed.

• 选择截割头钻进速度作为优化设计的目标,选取截割头直径、截割头锥角、叶片螺旋升角等作为设计变量,讨论了其隶属函数。