圆弧形模切刀折弯成形的工艺方法

Process Method of Bending Forming of Arc Die Cutting Tool

为了优化圆弧形模切刀折弯次数、进刀长度及折弯角度等参数,减少数控弯刀机进刀系统和弯刀系统圆整误差的影响,通过对圆弧形模切刀线性化工艺处理中进刀长度的理论分析,提出理想组装状态下最大进刀长度及极限组装状态下最大进刀长度的概念;建立进刀长度的计算公式,并针对大弧长、小弧长圆弧形模切刀,提出选整长度圆整角度、选整角度圆整长度两种工艺方法。在此基础上,开发基于AutoCAD2010平台的数控弯刀机CAD/CAM系统,并通过圆弧折弯成形实验验证了该工艺方法的可行性和高效性。

In order to optimize the bending times,feeding length and bending angle of an arc die cutting tool and reduce the influence on bending precision of the rounding error of the CNC(computer numerical control)bender machine feeding system and the bending system,the concepts of maximum feeding length in perfect assembly state and maximum feeding length in limit assembly state are proposed,and the feeding length calculation formula are established.for arc die cutting tool of the long arc length,a technology method of rounding angle and selecting length of integer times pulse equivalency is proposed,for arc die cutting tool of the short arc length,a technology method of round length and electing angle of integer times pulse equivalency is proposed.On this basis,the CAD/CAM system of CNC bender machine is developed based on AutoCAD2010 platform,and the efficiency and validity of the process method are verified by arc bending forming experiments.