Abstract:

In view of low sawing efficiency and large kerf loss in the free abrasive wire sawing, a new method of semi-fixed wire sawing was put forward. In order to improve sawing efficiency and reduce kerf loss, wire saw surface made groove and abrasive particles were embedded into the groove to realize the instant consolidation. VW-6000/5000 dynamic microscope system observed the motion state of the abrasive particle in the cutting area. The results indicate that abrasive particle can realize the instant consolidation in the groove. The differences in sawing efficiency, surface roughness and kerf width by semi-fixed wire saw and steel wire saw were analysed by cutting experiments.

Key words: semi-fixed wire saw, free abrasive machining, sawing efficiency, kerf width

摘要：

针对目前游离磨料线锯切割效率低、切缝损失大的缺点，提出了一种亚固结线锯切割的新方法，即在线锯表面增加凹槽，在线锯切割时让磨粒嵌入凹槽实现瞬间固结，从而达到提高效率和减小切缝损失的目的。应用VW-6000/5000动态分析三维显微系统，观测切割区域内磨粒的运动状态，结果表明磨粒可以实现瞬间固结。通过亚固结线锯和游离磨料线锯的切割对比实验，分析了两者在切割效率、切缝宽度和表面粗糙度方面的差距。

关键词: 亚固结线锯, 游离磨料加工, 切割效率, 切缝宽度