活结叉弯曲件冲压工艺分析及模具设计.doc
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- 关 键 词:
- 活结 弯曲 冲压 工艺 分析 模具设计
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1、活结叉弯曲件冲压工艺摘要:冲压制品已在工业、农业、国防和日常生活中的方面得到广泛应用,特别是在机械业中更为突出。冷冲压冲裁模主要用于金属制品的成型,它是冲压制品生产中十分重要的工艺装置。冲压级进模的基本组成是:上下模座、模具垫板、下模固定板、凹模镶块、侧刃、导料板、导柱导套、卸料板等。本设计介绍了重要零件的工艺参数的选择与计算,冲裁机构与送料挡料以及其它结构的设计过程,并对着重对模具的设计部分作了详细介绍。弯曲工艺的基本运动是定位板先与板料接触并压死,凸模下降至与板料接触,并继续下降进入凹模,凸、凹模及板料产生相对运动,导致板料变形折弯,然后凸、凹模分开,弯曲凹模上的顶杆(或滑块)把弯曲件推出
2、,完成弯曲运动。定位板及顶杆的运动是非常关键的,为了保证弯曲的质量或生产效率,必须首先控制定位板的运动,让它先于凸模与板料接触,并且压料力一定要足够,否则弯曲件尺寸精度差,平面度不良;其次,应确保顶杆力足够,以使它顺利地把弯曲件推出,否则弯曲件变形,生产效率低。对于精度要求较高的弯曲件,应特别注意一点,最好在弯曲运动中,要有一个运动死点,即所有相关结构件能够碰死。 关键词 :级进模,弯曲,凹模,凸模,顶杆 A fork bending stamping processAbstract: Stamping products has been extensively applied in the
3、industry, agriculture, national defense and in the daily lives of area, especially in the machinery industry.Cold-metal stamping die mainly used for the metal products, and it is very important in the production of stamping technology devices. The basic component of stamping progressive die molds is
4、 block model from top to bottom, backing strip,fixed-plate of mould, die inserts, raising nails,kicker, guide pillars and guide bushes,stripper plate and so on.This design introduced the mold the technological parameters choice and the computation of the important components, the blanking organizati
5、on and the feeding keep off the material as well as other structure design process, and to has made the detailed introduction emphatically to molds design parts.Bending process is the gauge plate before the basic movement and the sheet metal contacts and crushed, reduced to the punch and the sheet m
6、etal contacts and to continue to fall into the matrix, convex and concave molds and sheet metal production relative motion, leading to deformation of folded sheet bend, then convex, concave mold to separate the mandrill bending matrix (or slider) to launch bending side to complete the bending moveme
7、nt. Stripper plate and kicker pin movements is critical in order to ensure the quality or production efficiency curve, we must first control the discharge plate movement, it preceded the punch and the sheet metal contacts, and press material force must be sufficient otherwise the bending part dimens
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