在大面积板料上冲孔,大多用无导向冲摸,其脱料板结构一般如图1所示,安装时对正间隙困难。国外有使用图2形式的,确有好处,但必须使H≥e+n。我们认为脱料板厚度过大会影响凸模的使用寿命,于是根据具体情况制造了图3所示的一种结构,即凸模固定板和脱料板两端加“耳 In a large area of ​​sheet metal punching, mostly non-oriented punch touch, the stripper structure generally shown in Figure 1, the installation of the positive gap difficult. It is indeed beneficial to use the form of Figure 2 abroad, but H ≥ e + n must be made. We believe that the thickness of stripper assembly affect the service life of the punch, so according to the specific circumstances of a structure shown in Figure 3, the punch fixed plate and stripper plate at both ends plus "ear