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一、毛坯形状的选择图1所示为薄壁圆筒形零件,其材料为0.3mm的08F冷轧钢板。该零件一般采用φ160mm的圆形板进行拉深。在2000×1000mm的标准钢板上双排下料,其废料率达30.7％。经试验后,我们用图2所示的最佳毛坯形状进行拉深,能节省材料。毛坯计算公式为:a= x D=150 (mm);s=~2(1/2)a-D=52(mm);m=d/D_z;D_z=1.06a。式中:a——最佳毛坯形状边长;s——切去四个角的三角形斜边长;D_z——最佳毛坯形状的当量直径;D——圆筒件展开成圆毛坯的直径;
First, the choice of rough shape Figure 1 shows the thin-walled cylindrical parts, the material is 0.3mm 08F cold-rolled steel. The parts are generally used φ160mm round plate for drawing. In the 2000 × 1000mm double row of standard steel cutting, the scrap rate of 30.7%. After testing, we use Figure 2 shows the best shape of the blank drawing, can save material. The formula of the blank is: a = x D = 150 (mm); s = ~ 2 (1/2) a-D = 52 (mm); m = d / D_z; D_z = 1.06a. Where: a - edge length of the best rough shape; s - triangle cut off the four corners of the hypotenuse length; D_z - the equivalent diameter of the best shape of the blank; D - cylindrical member expanded into a round rough diameter ;