论文部分内容阅读
对于2毫米以上的环氧酚醛玻璃布板3240复合冲裁模具的设计,在较长时间内都按非金属材料查表,选用小间隙,料厚2毫米采用双面间隙0.05mm,为料厚的2.5％,在同一个零件内,不分尺寸大小,不分内孔外形和形状繁简,一律选用同一种间隙值。由于材料的层压组织和易脆性、胀缩性,使冲件产生尺寸缩小胀大。或边缘分层发白。我们曾采用过以下几种解决办法: 1.冲裁之后在孔的发白一面划窝,去除分层崩裂部分。
For more than 2 mm epoxy phenolic glass cloth 3240 composite blanking die design, in a longer period of time by non-metallic materials look-up table, use a small gap, material thickness 2 mm with double-sided gap of 0.05mm, the material thickness Of the 2.5%, in the same part, regardless of size, regardless of the shape and shape of the inner hole Jane, all use the same gap value. Due to the lamination of the material and the brittleness, expansion and contraction of the material, the size of the punch is reduced and expanded. Or edge layered white. We have used the following solutions: 1. After blanking the blanking holes in the hole plank nest, remove the delamination crack.