沖壓專業(yè)外文翻譯-----普通全鋼沖模的沖壓精度分析-wenkub
2023-05-19 15:44:03 本頁面
【正文】 cessing 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。 the error that because the abrade of the c utter and impression will be as the cutter grinding times increased at the same time. And that will cause the error oversize gradually。General allsteel punching die’ s punching accuracy General allsteel punching die’s punching accuracy Accuracy of panel punching part is display the press accuracy of the die exactly. But the accuracy of any punching parts’ linear dimension and positional accuracy almost depend on the blanking and blanking accuracy,. So that the pound mould of pound punching’s accuracy, is typicalness and representation in the majority. Analyse of the die’s accuracy For the analyse of pracyicable inaccuracy during production of dies to inactivation, we could get the tendency when it is augmentation in most time. From this we could analyse the elements. When the new punch dies pt into production to the first cutter grinding, the inaccuracy produced called initial error。 and also have another part error are unconventional , unforeseen. Therefore, every die’ s error are posed of fixed error, system error, accident error and so on. 1. fixed error At the whole process when the New punching die between just input production to discard, the changeless master error that in qualified part are called fixed error. It’s magnitude is the deviation when the die production qualified products before the first cutter grinding. Also is the initial error, but the die have initial punching accuracy at this time. Because of the abrade of parts, the die after grinding will be change the dimension error. And the increment of deviation will oversize as the times of cutter grinding. So the punching accuracy after cutter grinding also called “grinding accuracy” and lower tan initial accuracy. The fixed error depend on the elements factor as followed : (1) the material , sorts, structure, (form) dimension, and thick of panel the magnitude of punching gap and degree of homogeneity are have a important effect for the dimension accuracy. Different punching process, material, thick of panel, have pletely different gap and punching accuracy. A gear H62 which made in yellow brass with the same mode number m=, 2mm thick and had a center hole, when the gap get C=%t (single edge) , and punched with pound punching die, and the dimension accuracy reached IT7, the part have a flat surface ,the verticality of tangent plane reached 176。39。 ~ ,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。, the processing surface roughness Ra value was bigger . However, the electri
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