Development of Three Dimensional Micro Machining Method for Diamond

众所周知，金刚石刀具在对含铁材料进行切削加工时，会对金刚石刀具造成严重的磨损。本研究的目的是利用这一现象发展金刚石的三维微加工方法。实验是在车床上进行的，在车床的卡盘上固定一根亚铁材料棒，在车床刀架的刀柄上固定一颗单晶金刚石。在铁质材料棒的外表面上给定一个螺杆图案，并使切削过程中的进给速度与螺杆的螺距相同。通过该工艺，可以将螺杆图案转移到金刚石表面。通过以上实验，可以得出以下结论：不管晶体取向如何，金刚石都可以用这种方法加工。金刚石的去除率在（1,1,0）平面上最大，在（1,1,1）平面上最小。加工过程中切削温度的高低对金刚石的去除率有影响。与YAG激光加工相比，该方法加工的表面质量要好得多。该方法的加工去除率优于其他摩擦方法。通过测量切削力、加工温度和实际切削深度对该加工过程进行了研究。

It is well known that a diamond tool will be worn severely when cutting process is performed to ferrous material by a diamond tool. The purpose of this research is to develop a three dimensional micro machining method for a diamond by utilizing this phenomenon. The experiment is conducted by a lathe, where a ferrous material rod is fixed at the chuck of the lathe, and a single crystal diamond is fixed on top of a shank in the tool post of the lathe. A screw pattern is given to the external surface of the ferrous material rod and the feed rate during cutting process is made into the same value as the pitch of the screw. By this process, the pattern of screw can be transferred on the diamond surface. From the above experiments, the following conclusions can be obtained.1.A diamond can be machined by this method 'irrespective of the crystallographic orientation.2.The removal rate of diamond is the largest in (1,1,0) plane, and it is the smallest in (1,1,1) plane.3.The cutting temperature degree during the process is effective on the removal rate of diamond.4.The machined surface by this method is much better than that one by YAG laser machining. The machining removal rate by this method is better than that by other rubbing method.5.The process of this machining is investigated by measuring the cutting force, the machining temperature and the actual depth of cut.