外屏蔽罩拉深模设计-U形型件冲压模具含proe三维及26张CAD图+说明书

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    摘要

    冲压是利用安装在冲压设备(主要是压力机)上的模具对材料施加压力,使其产生分离或塑性变形,从而获得所需零件的一种压力加工方法。冲压通常是在常温下对材料进行冷变形加工,且主要采用板料来加工成所需零件,所以也叫冷冲压或板料冲压。冲压所使用的模具称为冲压模具,简称冲模。冲模是将材料(金属或非金属)批量加工成所需冲件的专用工具。冲模在冲压中至关重要,没有符合要求的冲模,批量冲压生产就难以进行;没有先进的冲模,先进的冲压工艺就难以实现。拉深是利用模具使平板毛坯变成为开口的空心零件的冲压方法,用拉深工艺可以制成筒形、阶梯形、锥形、抛物面形、盒形和其他不规则形状的薄壁零件,其中又以筒形件简单和多见,而有凸缘筒形件又分为宽凸缘和窄凸缘件。在拉深工艺设计时,必须知道冲压件能否一次拉出,这就引出了拉深系数的概念。拉伸系数决定于每次拉深时允许的极限变形程度。在多次拉深中,对于宽凸缘拉深件,则应在第一次拉深时,就拉成;零件所要求的凸缘直径,而在以后各次拉深中,凸缘直径保持不变。为了保证以后拉深时凸缘不变形,宽凸缘拉深件首次拉入凹模的材料应比零件最后拉深部分实际所需材料多3%~5%,这些多余材料在以后各次拉深中,逐渐将减少部分材料挤回到凸缘部分,使凸缘增厚,从而避免拉裂。
    关键词:拉深拉深变形拉深力

    ABSTRACT

    Stamping is a method of applying pressure to a material by means of a mold mounted on a stamping device(mainly a press) to cause separation or plastic deformation to obtain a desired pressure machining method for the desired part. Stamping is usually at room temperature for cold deformation of the material processing, and the main use of sheet metal to be processed into the required parts, it is also called cold stamping or sheet metal stamping. Stamping used by the mold called stamping die, referred to as die. Dies are special tools for batching materials(metal or nonmetal) into the required pieces. Punching in the stamping is essential, did not meet the requirements of the die, batch stamping production is difficult to carry out; no advanced die, advanced stamping process is difficult to achieve. Deep drawing is the use of mold to make the flat into a hollow blank parts of the stamping method,with the drawing process can be made of cylindrical, stepped, tapered, parabolic, box-shaped and other irregular shape of the thin-walled parts, Which in turn cylindrical and simple and more common, and a cylindrical tube is divided intowide flange and narrow flange pieces. In the drawing process design,we must knowwhether the stamping out a pull,which leads to the concept of drawing coefficient. The tensile modulus is determined by the degree of ultimate deformation allowed at each drawing. In the deep drawing, for thewide flange drawing parts, it should be in the first drawing, it pulls; parts required flange diameter, and in the subsequent drawing, the flange diameter to maintain constant. In order to ensure that the flange after the deformation is not deformed,wide flange drawing parts for the first time into the die material should be more than the final part of the material required to extract the actual material 3% to 5%, these excess materials in the future Deep,will gradually reduce the part of the material squeezed back to the flange part, so that the flange thickening, so as to avoid cracking.
    Keywords: drawing die drawing deformation drawing force

    目录

    第一章工艺分析1
    1.1外屏蔽罩拉深膜工艺性分析1
    1.1.1拉深件拉深变形特点1
    1.1.2拉深件要求1
    1.1.3拉深件工艺分析2
    1.2材料的工艺性能3
    第二章拉深工序计算4
    2.1选定切边余量δ4
    2.2.计算毛坯直径D4
    2.3计算工件拉深次数及各次拉深尺寸4
    第三章工序压力计算和压力机的选择5
    3.2压力机的选择原则5
    3.3排样设计5
    3.4第二次拉深压力机的选择5
    3.5第三次拉深压力机的选择6
    3.6第四次拉深压力机的选择7
    第四章模具工作部分尺寸和公差计算9
    4.1拉深成型模具设计00009
    4.2拉深模工作零件的结构和尺寸10
    4.3凸模与凹模之间间隙c10
    4.4凸模与凹模工作尺寸与公差11
    第五章零件切削加工工艺规程11
    5.1工艺规程设计11
    5.2确定毛坯的制造方式11
    5.3基准的选择11
    5.3.1粗基准的选择11
    5.3.2精基准的选择12
    5.4制定工艺路线13
    5.5机械加工余量、工序尺寸及毛坯尺寸的确定14
    5.6选择机床及刀具、量具14
    第六章工作零件结构尺寸和公差的确定20
    6.1落料拉深模选用原则20
    6.2模具零件尺寸确定21
    6.3模架选择22
    6.4模柄选择22
    6.5其他零件尺寸,材料22
    第七章拉深装配图的校核23
    结论24
    致谢25
    参考文献26
    展开简介...

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