沖孔模設(shè)計(jì)外文翻譯-其他專業(yè)-預(yù)覽頁(yè)
【正文】 instead of nest plates .This is a dropthrough design since the finished blanks drop through the die , the lower shoe , and the press bolster . Large blanks are monly produced by an inverted die in which the die is mounted to the upper shoe with the punch secured to the bottom shoe . The passing of a large blank through the bolster is often impractical but its size may necessitate sectional die design . Draft ,or angular clearance in an inverted die is unnecessary because the blank does not pass through it . For ease of construction , regrinding , and strength the cutting edges of each section should not include points and intricate contours . The springsloaded stripper is mounted on the lower shoe 。 任意一副完整的沖壓模具，都是由一對(duì)（或多對(duì)）生產(chǎn)沖壓零件的配合零件組成的，同時(shí)還包括模具上的固定支承零件和傳力連接零件。上、下模座連同導(dǎo)柱、導(dǎo)套組成的部件稱為模架。在沖裁完工件后，兩個(gè)凸模還要伸入凹模襯套一小段距離。彈簧驅(qū)動(dòng)的卸料板相對(duì)凹模板運(yùn)動(dòng)，將原材料卸下，直到凸模從沖過的孔內(nèi)抽出。由于沖出的落料件經(jīng)凹模、下模座和壓力機(jī)墊板內(nèi)孔下落，所以這是一幅下出料方式的結(jié)構(gòu)設(shè)計(jì)。為了使沖裁刃口結(jié)構(gòu)簡(jiǎn)單，便于修模，保證強(qiáng)度，每一個(gè)拼塊不應(yīng)該存在刃口輪廓線的交點(diǎn)和復(fù)雜輪廓。 壓力中心 如果所沖裁的零件 輪廓是不規(guī)則形狀，滑塊一側(cè)的剪切力的總和將遠(yuǎn)遠(yuǎn)超 過另一側(cè)的剪切力
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