沖壓專業(yè)外文翻譯-----普通全鋼沖模的沖壓精度分析-免費(fèi)閱讀
【正文】 對(duì)于拉深、彎曲等成形模，間隙大定將增大沖件口部尺寸誤差及回彈。 用精密磨削法制造沖模，特別是制造高精度、高壽命沖模，諸如：薄料小間隙復(fù)合沖裁模、多工位連續(xù)式復(fù)合模等，具有尺寸精度高、工作零件加工面粗糙度Ra 值小、模具壽命高等 特點(diǎn)。加工表面粗糙度 Ra 值能達(dá)到 m。 不同沖模結(jié)構(gòu)類型，由于適用沖壓料厚及制造精度的差異，導(dǎo)致沖件的固定誤差有別。通常情況下，沖件材料及其厚度 t是選取沖裁間隙的主要依據(jù)。所以，各類沖模沖件誤差是由因定誤差、漸增誤差、系統(tǒng)誤差及偶發(fā)誤差等幾部分綜合構(gòu)成。當(dāng) 其誤差超過極限偏差時(shí)，沖件就不合格，沖模也就失效報(bào)廢。 沖模的初始誤差通常是沖模整個(gè)壽命中沖件誤差最小的。 ~ , the processing surface roughness Ra value may reach ~ mu m. Therefore, with this craft manufacture the die , regardless of the size precision, the work ponents surface roughness, all can satisfy die, each kind of pound request, the die is especially higher than the electrical finishing craft manufacture scale. (4) gap size and degree of homogeneity the flange and other sheet forming sgene rally all must first punching (fall material) the plate to launch the semi finished materials, after also has the forming to fall the material, the incision obtains the single end product to flush. Therefore punching the work, including is monly used punching hole, the margin, cut side and so on, regarding each kind of sheet pressing partall is necessary. Therefore punching the gap to flushes a out form in chprecision to have the decisive influence. punching the gap small and is even, may cause punching the size gain high accuracy. Regarding drawability, is curving and so on mould, the gap greatly will decide increases flushes the oral area size error and the snapping back. The gapnonuniformity can cause to flush a burr enlarges and incurs cutting edge the nonuniform attrition. (5) ramming equipment elastic deformation In the ramming process After the punch press load bearing can have the certain elastic deformation. Although this kind of distortion quantity according to flushes the pressure the size to change also to have the obvious directivity, but on the pressing part, mainly is to has the volume ramming archery target stamping, embosses, the equalization, the pressure is raised, the wave, flushes crowds, the shape, the flange, hits flatly, thinly changes draw ability and so on the craft work punching forming flushes, has the significant influence to its ramming aspect size precision 普通全鋼沖模的沖壓精度分析 板料沖壓件的精度準(zhǔn)確顯示出其沖模的沖壓精度。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。 if the die grinding more than twenty times, until it’s discard, the inaccuracy called conventional error。 and the punching part are punched with progressive die, the gap C=7%t (single edge) , initial accuracy are IT11, and have an more rough surface, even can see the gap with eyes. In the usual situation, flushes a material and its thickness t is theselection punching gap main basis. Once the designation gap haddetermined flushes the plane size the fixed error main body。, generally all in177。在現(xiàn)場，確定沖模刃磨壽命的依據(jù)是沖件沖孔與落料的毛刺高度。因此，沖模的制造精度與質(zhì)量等因素決定了沖模的初始沖壓精度，也造就了沖件的初始誤差。 沖件的極限誤差是具有極限偏差的沖件所具有的實(shí)際允許的最大尺寸誤差。不同沖裁工藝、不同材料種類與不等料厚，間隙相差懸殊，沖壓精度差異很大。此外，采有無搭邊排樣，沖件的誤差要遠(yuǎn)大于有搭邊排樣沖件。我們必須用金剛石粉研磨或數(shù)控連續(xù)軌跡坐標(biāo)磨削（對(duì)線切割
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