磨粒固化气囊光整技术及试验研究

Abrasive solidified balloon polishing technique and experimental study

针对模具激光强化表面高硬度、高耐磨性以及局域硬度差异等问题,提出了一种磨粒固化气囊光整加工新技术,以期实现模具激光强化表面的高效精密自动化光整加工。该技术将处于游离态的磨粒通过高分子粘结剂固化于橡胶基体表层,使磨粒群获得更稳定的支撑,形成了更有效和平稳的切削效果。根据磨粒固化气囊的性能要求,从材料特性着手,确定出通过酸性硅酮密封胶将磨粒直接固化在丁苯橡胶基体表面,以制得磨粒固化气囊的工艺方法;借助机器人辅助加工平台,对制得的不同粘结层厚度的磨粒固化气囊进行了光整试验研究。研究结果表明:通过控制磨粒固化气囊的均匀性,加强复合层的粘结效果,可以降低工件表面粗糙度,提高加工效率,为模具高效光整加工奠定了坚实的基础。

In order to solve the problems of mould laser enhanced surface＇s high hardness, wear resistance and local hardness difference, a new technique of abrasive solidified balloon polishing was proposed to achieve the efficient, precision and automatic polishing. This technique made free abrasive solidify out of the rubber balloon surface by polymer binder, so that the abrasive group could obtain more stable support, form more effective and smooth cutting effect. Consideration of the abrasive solidified balloon＇s performance requirements, a process method that makes abrasive solidify out of the acid silicone sealant surface by SBR was established. With the robot auxiliary platform, the abrasive solidified balloon was tested. The experimental results show that by controlling the uniformity of abrasive solidified balloon, and strengthening the bonding effect of composite layer, it could reduce the surface roughness, and improve processing efficiency, which lays a solid foundation for the mold efficient polishing.