机械5

变压器垫板冲压工艺及模具设计 摘要 本设计的题目为变压器垫板冲压工艺及模具设计,体现了薄板类冲裁零件的要求、内容及方向，有一定的设计意义。通过对该零件模具的设计，进一步加强了本人冲压模设计的基础知识，为设计更复杂的冲压模具做好了铺垫和吸取更深刻的经验。 本设计运用冲压成型工艺及模具设计的基础知识，首先分析了冲裁件的冲压工艺性，为确定冲裁工艺方案做好了准备；然后计算冲裁力和模具刃口尺寸，便于选取压力机及确定工作零件的尺寸和结构；最后分析了制件的特征，确定模具的设计参数、设计要点及推件装置的选龋 本冲裁件上孔为规则形状的孔,为了便于冲孔凸模的加工，所以在设计时把冲孔凸模设计成直通式,然后,将其铆接在凸模固定板上。此外,该制件的尺寸较大,为保证凹模的加工精度,在设计时应将其设计成凹模组件。为了方便制件的取出，本副模具采用倒装结构形式,同时,为了简化模具结构采用弹性推件装置。 关键词冲压模,倒装复合,凹模组件,弹性推件 EVAPORATOR BACK PLATE RAMMING CRAFT AND MOLD DESIGN ABSTRACT: The title of the desig
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ng 目录 1绪论……………………………………………………………1 1.1冲压的概念，特点及应用……………………………………………………………1 1.2国内模具的现状方向以及冲压技术现状及发展方向……………………………2 1.2.1国内模具的现状………………………………………………………2 1.2.2国内模具的发展趋势…………………………………………………3 1.2.3冲压标准化及专业化生产方面趋势…………………………………4 1.3变压器垫板冲孔落料模具设计与制造方面………………………5 1.3.1变压器垫板冲孔落料模具设计的设计思路…………………………5 1.3.2变压器垫板冲压模具设计的进度……………………………………5 2变压器垫板的冲压工艺性分析………………………………………6 3分析比较和确定工艺方案…………………………………………6 4模具结构型式的选择…………………………………………………7 4.1模具结构型式………………………………………………………………………8 4.2推件装置……………………………………………………………………………8 4.3导向装置……………………………………………………………………………8 4.4定位装置……………………………………………………………………………8 5工艺计算………………………………………………………………9 5.1排样设计及毛坯尺寸计算…………………………………………………………9 5.1.1确定零件的排样方案………………………………………………9 5.1.2条料宽度、导尺间宽度的计算……………………………………9 5.1.3材料利用率的计算…………………………………………………10 5.2冲裁工序总力的计算………………………………………………11 5.3初选压力机…………………………………………………………12 5.4压力中心的计算……………………………………………………12 5.5确定凸凹模间隙，计算凸凹刃口尺寸………………………………13 5.5.1凸凹模刃口尺寸的计算基本原则…………………………………13 5.5.2凸凹模具间隙的确定………………………………………………14 5.5.3落料凸凹模刃口尺寸计算…………………………………………14 5.5.4落料凸凹模尺寸计算………………………………………………16 6设计、选用模具零部件…………………………………………18 6.1冲孔凸模的设计……………………………………………………18 6.2落料凹模的设计……………………………………………………20 6.2.1落料凹模的刃口型式………………………………………………20 6.2.2落料凹模外形尺寸的确定…………………………………………20 6.2.3落料凹模的结构形式及固定方式…………………………………23 6.3凸凹模的设计…………………………………………………………24 6.4定位零件的设计与选用………………………………………………26 6.4.1挡料销的选用………………………………………………………26 6.5卸料与推件零件的选用………………………………………………26 6.5.1推杆和顶干的选用…………………………………………………26 6.5.2推件块的设计………………………………………………………26 6.5.3卸料螺钉的选用……………………………………………………26 6.5.4卸料板的设计………………………………………………………27 6.6导向零件的选用………………………………………………………27 6.7固定零件的选用………………………………………………………28 6.8弹性元件的选用………………………………………………………28 6.9模架的及模柄选用……………………………………………………28 7模具总装图………………………………………………………29 7.1模具总装图…………………………………………………………29 7.2冲压设备的确定………………………………………………………30 8结束语……………………………………………………………31 致谢……………………………………………………………32 参考文献……………………………………………………………33