在设计金属切削机床和锻压设备大件中的板壁部分时,为了提高它的抗弯刚度和抗扭刚度,同时避免板壁过分厚重,适当地安排加强筋是必要的。在一个单元板壁上,筋的分布象汉语的“米”字的(如图 1a所示),叫做“米”字筋;筋的分布象汉语的“井”字的(如图1b所示),叫做“井”字筋。图2 In the design of metalworking machine tools and forging equipment in the large wall parts, in order to improve its flexural rigidity and torsional stiffness, while avoiding excessive wall thickness, the proper arrangement of stiffeners is necessary. The distribution of tendons in a cell wall is like the Chinese “m” (as shown in Figure 1a), which is called “m”. The distribution of tendons is like the Chinese word “well” (Figure 1b) , Called “well” word tendons. figure 2