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在缺乏线切割电加工等专用模具加工设备的条件下,对某些中、小型冲裁件,若直接设计成整体式的凸、凹模结构,在设计上虽然简单些,但在制造上会带来相当的困难,有时甚至无法加工。此时若能根据零件形状的某些特点,对凸凹模设计采用相应的镶块结构,则在制造上就方便多了。现举例说明: 飞锤支架(如图1所示)是290柴油机油泵油咀总成上的一个冲压弯曲零件。该零件外形较复杂,中间开有两条月亮槽,槽宽仅4mm,槽的两端成尖角状。很明显,如果要在一次行程中完成工件的下料和冲孔工序,其凸凹模制造就比较困难,特别是槽子的两头尖角处,如采用一般的方法很难加工出来。现在,我们把凸凹模分解成内模块和外模块两部分,然后利用两个镶块将内、外模组装起来(见图2)。通过内外
In the absence of wire EDM and other special mold processing equipment under the conditions of some medium and small blanking pieces, if the direct design of the integrated convex and concave mold structure, although the design is simpler, but the manufacturing will be Brought considerable difficulties, and sometimes can not even be processed. At this point if the shape of the parts according to some of the features of the punch and die design using the corresponding insert structure, the more convenient to manufacture. An example of this is the flywheel bracket (shown in Figure 1), a stamped and bent part on the 290 diesel pump oil nozzle assembly. The part is more complicated in shape, with two moon slots in the middle and a slot width of only 4 mm, with the ends of the slots angled. Obviously, if you want to complete the work of a workpiece in the blanking and punching process, the punch and die manufacturing more difficult, especially at the two sharp corners of the tank, as the use of the general method is difficult to work out. Now, we split the punch into two parts, inner and outer, and then use two inserts to assemble the inner and outer dies (see Figure 2). Through the inside and outside