机械5

U型弯曲冲压成形工艺及模具设计 摘要 本文介绍的是弯板支架冲孔弯曲级进模，该模具实例结构简单实用，使用方便可靠。首先根据工件图算工件的展开尺寸，再根据展开尺寸算该零件的压力中心，材料利用率，画排样图；其次依据凸、凹模不同的制造方法和冲裁工艺方案计算出凸、凹模的刃口尺寸；计算冲压力，选择冲压设备；根据零件的几何形状要求和尺寸的分析，进行凸、凹模结构设计,最后总体设计。当所有的参数计算完后，对模具的装配方案，对主要零件的设计和装配要求技术要求都进行分析。在设计过程中除了设计说明书外，还包括模具的装配图，非标准零件的零件图。 关键词：弯曲；级进模；冲压 The I
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ng 目录 1绪论…………………………………………………………………………1 1.1模具的历史和背景……………………………………………………1 1.2标准件发展现状………………………………………………………1 1.3标准件市场发展展望…………………………………………………4 2冲孔落料模具设计…………………………………………………………7 2.1冲裁件工艺分析……………………………………………………………7 2.2冲裁工艺和方案分析…………………………………………………7 2.3模具类型的选择………………………………………………………8 3弯曲模的设计………………………………………………………………10 3.1弯曲件的结构工艺性…………………………………………………10 3.2弯曲工艺设计…………………………………………………………11 3.3重要零部件设计……………………………………………………………16 3.4模具结构设计………………………………………………………………19 4模具的装配…………………………………………………………………22 5设计小节……………………………………………………………………23 致谢…………………………………………………………………………25 参考文献……………………………………………………………………26