毛坯刚性对金属板材冲裁力的影响

• 作 者: 俞焕文
• 出 处: 模具通讯
• 发表日期: 1984年05期
• 关键词: 冲裁力 金属板材 相对厚度 冲孔 工艺计算 凹模 间隙值 工艺数据 材料厚度 变形金属

在分析金属板材冲裁过程、以及在完成工艺计算时,常常不考虑落料零件和冲孔废料的刚性,因此得到错误的工艺数据。 图1为不同刚性零件的落料——冲孔图:刚性小的相对薄的零件(图1a)和相对厚度大的零件(图1b)。第一种情况落料零件在弯矩的作用下容易弯曲,不产生附加的剪切抗力;而在第二种情况弯曲实际上不大,但

In analyzing the blanking process of sheet metal and the calculation of the process, the rigidity of the blanking parts and the punching waste is often not taken into account, resulting in incorrect process data. Figure 1 shows the blanking-punching patterns for different rigid parts: a relatively rigid part with a relatively thin part (Figure 1a) and a relatively thick part (Figure 1b). In the first case, the blanking part is easily bent under the action of bending moment and does not generate any additional shear resistance. In the second case, the bending is practically not large,