Water Jet Laser: for Cutting Single Crystal Diamond,CVD Diamond and Other Ultra-hard Materials
- 作者：Peter J Heath
- 会议时间：2013-11-13
- 作者单位：Synova S A., Switzerland
- 母体文献：第六届郑州国际超硬材料及制品研讨会暨庆祝中国人造金刚石诞生50周年大会论文集
- 会议名称：第六届郑州国际超硬材料及制品研讨会暨庆祝中国人造金刚石诞生50周年大会
- 会议地点：郑州
- 主办单位：中国机床工具工业协会
- 语种：chi
摘要
The Laser Micro Jet (LMJ) is a precision cutting machine in which the laser pulses are directed down a very fine jet of water.As a result the laser pulses are taken to the bottom of the cut and the sides of the cut remain parallel.The water jet follows the contour of the work piece so no focussing is required and the water cools the material as it is being cut.Diamond manufacturers and toolmakers can use the wet laser to cut, slice, dice and drill materials such as natural and synthetic single crystal diamond, polycrystalline diamond, polycrystalline PCBN and CVD diamond.Cuts up to 25 mm deep have been achieved with a width of only 50 microns.As the water jet cannot bend, the cuts are perfectly straight.Wet lasers are already replacing dry lasers for the cutting of high value gem diamond stones as thermal shock breakage is reduced by 50% and the parallel sided cut improves yields and reduces polishing times.With industrial natural and synthetic diamond, the wet laser can significantly reduce the time taken for shaping the profiles of tools and, as with gem quality diamond, the cutting is cool and much cleaner than with dry laser cutting.Low CBN content PCBN is thermally shock sensitive and dry lasers can cause cracking.The wet laser prevents local overheating and hence cracking can be reduced or eliminated.This paper looks at the many advantages water can make to the laser cutting process