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薄墊片沖壓復合模設計(存儲版)

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【正文】 孔與凹模刃口間的距離取大于兩倍孔徑值。 CB =(17+)177。 確定沖模刃口制造公差時,應考慮制件的公差要求。從生產(chǎn)實踐中可以發(fā)現(xiàn): 由于凸、凹模之間存在間隙,使落下的料和沖出的孔都帶有錐度,且落料件的大端尺寸等于凹模尺寸,沖孔件的小端尺寸等于凸模的尺寸??紤]到模具在使用過程中的磨損使間隙增大,故設計與制造新模具時要采用最小合理間隙值 Cmin。否則,會使沖模和壓力機滑塊產(chǎn)生偏心載荷,使滑塊和導軌間產(chǎn)生過大磨損,模具導向零件加速磨損,降低了模具和壓力機的使用壽命。 比 較方案( a) 和方案( b) , 方案( b) 所裁條料寬度過窄,剪板時容易造成條料的變形和卷曲,所以應采用 方案( a) 。 制件沒有平直度要求,為了操作方便安全,要求沖孔廢料不出現(xiàn)在模具的工作區(qū)域,使沖孔廢料通過凸凹模孔向下漏掉。 ( 2)零件結構:該沖裁件結構簡單,比較合適沖裁。 模具的失效原因有很多, 材料方面的原因占較大的比重,據(jù)資料統(tǒng)計, 因選材和 2 用材不當,致使模具過早失效,大約占失效模具的 45%以上。另外,電子和通訊產(chǎn)品對模具的需求也非常大,在發(fā)達國家往往占到模具市場總量的 20%之多。但利用冷沖模具生產(chǎn)零件的操作卻很簡單,單件零件生產(chǎn)周期也很短,零件成本可以很低。 關鍵詞 :復合模 落料 沖孔 工藝分析 II Abstract This paper is aimed at a given part drawing mould process analysis and cold stamping mould design, the prehensive consideration of the economic, parts of the stamping technology and the plex degree and accuracy, and many other factors based on the stamping process analysis and calculation, and put forward the reasonable technical scheme and structure, this paper introduces the design of the mould arrangement way, discussed the main parts of the determination and the blade gap size and rushed the calculation of the pressure, the design of main working parts of die size calculation and main parts design and processing technology formulation. The mould product quality and improve the production efficiency and reduce the cost of product quality, the mold with production requirements. Key words: Compound Die。Process Analysi III 目錄 緒論 ............................................................................................................................................. 1 1 彈性卡 沖壓工藝分析 ............................................................................................................... 2 彈性卡 ........................................................................................................... 2 分析沖壓工藝性 .............................................................................................................. 2 2 沖壓工藝方案的確定 ................................................................................................................. 2 3 沖裁模設計 ............................................................................................................................... 3 排樣方式的設計 ............................................................................................................... 3 沖裁力和壓力中心的計 算 ................................................................................................ 4 ........................................................................................................... 4 ........................................................................................................... 5 ........................................................................................................... 5 : ............................................................................................. 5 : ......................................................................................... 6 : ...................................................................................... 6 沖裁 模具的間隙選擇 ....................................................................................................... 6 凸模與凹模刃口尺寸的計算 ........................................................................................... 7 ......................................................................................... 7 、凸模刃口尺寸的計算 ...................................................................................... 8 卸料裝置中彈性元件的計算 ...................................................................................... 9 卸料塊的設計 ..................
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