冲压专业外文翻译-----普通全钢冲模的冲压精度分析(编辑修改稿)

冲压专业外文翻译-----普通全钢冲模的冲压精度分析(编辑修改稿)内容摘要：

kind ofsmall gap punching pared to select C = 8%t (unilaterally) III kindof big gap punching, will flush a fixed error to enlarge 40% ~ 60%, theprecision at least will fall a level. Side in addition, whether thereis picks builds a row of type side, flushes a error to have far to bebigger than has builds a row of type to flush. Side not builds a rowof type to flush. Side not builds a row of type to flush a precisionto be lower than the IT12 level side, but most has builds a row oftype to flush a precision in IT11 between ~ IT9 level, material thickt 4mm flushes, the size precision can lower some. Different die’s structure type, because is suitable the rammingmaterial to be thick and the manufacture precision difference, causesto flush a fixed error to have leaves. Compound die center, multilocations continuous type pound die because flushes continuously toduplicate the localization to add on the pattern making error to bebigger, therefore it flushes a fixed error pound punching die to wantpared to the single location Big 1 ~ 2 levels (3) the craft of punching die’s manufacture the main work of punching die namely are raised, the concave moldprocessing procedure, to operates on the specification not to behigh, can time form a more plex cavity. But its processing surfaceapproximately is thick ~ is the high temperatureablation remaining furcated austenite organization, degree ofhardness may reach as high as HRC67 ~ 70, has the micro crack, easilywhen punching appears broke the cutter or flaking. The Italian CorradaCorporation39。 39。 s related memoir called the line cut the processing contruction to have the disadvantageous influence to the superficialgold, in fact already changed the gold contruction. We must use theJin39。 39。 gang stone powder to grind or the numerical control continual pathcoordinates rub truncate (cut to line) to make the precision work . In recent years country and so on Switzerland and Japan, has conductedthe thorough research to the electrical finishing equipment and abigger improvement, makes function plete high accuracy NC and theCNC line cutter, the processing precision may reach 177。 ~ ,even is smaller. The processing surface roughness Ra value can mu m. According to the recent years to the domestic 12 productionlines cutter factory investigation and study, the domesticallyproduced line cutter processing precision different factory differentmodel line cutter might reach 177。 ~ 177。 , generally all in177。 or bigger somewhat, was individual also can achieve177。 , the processing surface roughness Ra value was bigger . However, the electrical finishing ablation metal surface thus the change and the damage machined surface mental structure character can not change, only if with rubs truncates or other ways removes this harmful level. Therefore, merely uses electricity machining, including the spark cutting and the electricity perforation, achieves with difficulty punching, especially high accuracy, high life punching die to size precision and work ponents surface roughness Ra value request.。