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(一)结构改进过去设计的冲孔模,尤其是大型零件冲孔模,其中的零部件多是设计成整体式的,同时冲几个孔的模具其凸凹模的固定板、垫板等连成一体。这种结构模具的缺点在于:模具庞大、笨重,各零件加工及装拆均较困碓;一遇凸凹模工作部分磨损或损坏等,就得拆卸整个动模或定模部分,劳动强度大。同时大型模具的导向装置,要保证其上模座与底座的导柱孔和导套孔同心,机械加工很费力,需配备大型机床或用特殊方法来达到。毛主席教导我们:“人类总得不断地总结经验,有所发
(A) the structure to improve the past design of punching die, especially large parts punching die, which is more than one part of the design is integrated, while punching a few holes of the die punch and die plate, plate and so on Into one. The shortcomings of the structure of the mold is: large mold, bulky, all parts of the processing and assembly and disassembly are more sleepy; a case of punch working part of the wear or damage, you have to remove the entire dynamic mode or part of the fixed mold, labor-intensive. At the same time large-scale mold guide, to ensure that the mold base and the base of the guide post hole and guide hole concentric, machining is very laborious, with a large machine or equipped with special methods to achieve. Chairman Mao taught us: "Mankind always has to sum up his experience and has made some progress