毕业论文--U型件弯曲模具设计.doc

**** **** 届毕业设计 U 型件弯曲模论文作者姓名: __ **__ 所在院系: **** 学院_____ 所学专业: 机械制造及自动化指导老师: _ *** _ 论文完成时间: _ **** 年*月**日___ 2 目录内容摘要....................................................................................................... 3 关键词........................................................................................................... 3 Abstract ....................................................................................................... 3 Key word ....................................................................................................... 4 ....................................................................................................... 5 ........................................... 5 ........................................... 5 ........................................... 6 ........................................... 6 ......................................... 7 ........................................... 7 ....................................... 7 ....................................... 8 ............................... 9 ............................................ 14 .......................................... 15 参考文献.................................................. 16 致谢...................................................... 17 3 内容摘要: 弯曲工艺的基本运动是卸料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)把弯曲边推出,完成弯曲运动。卸料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,必须首先控制卸料板的运动,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: 弯曲、凹模、凸模、顶杆、卸料板 Abstrac: Bending process isthe stripper plate before the basic movement and the sheet metal contacts and crushed, reduced to the punch and the sheet metal contacts and tocontinue tofall into the matrix, convex and concave molds and sheet metal production relative motion, leading todeformation offolded sheet bend, the