【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 si
【机 构】
:
Synova S A., Switzerland
【出 处】
:
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
论文部分内容阅读
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
其他文献
本文分析了近几年来钻探工程中出现的难题,针对热压金刚石钻头研究和应用中的热点,以实践为依据,总结出点滴认识.提出了冷压成型和制粒技术的应用以及冷压和热压方法相结合的烧结工艺,提出了钻进坚硬致密岩石钻头的设计思路,提出了用热压钻头替代电镀钻头的设计与制造方法.同时认为,钻头的性能、岩石的性质和钻进工艺技术是不可分割的系统;钻头的设计与选型离不开岩石的性质与钻进工艺技术.这些结论对于钻头制造商和用户都
本文针对干切削刀具PCBN材料对高热硬度、高耐磨性及热稳定性的要求,通过TiN0.3/AlN/CBN陶瓷结合剂的制备,采用SEM、EDS、XRD等分析方法,获得了全部由CBN、TiN0.3、TiNx及AlN组成的PCBN,无低熔点、低硬度相,解决了TiN、AlN等共价键类化合物的低温烧结问题,降低了烧结温度;高密度微区域扩散使烧结体的硬度、韧性都得到提高,并且在5.5GPa+1500℃条件下达到性
以硝酸铝、异丙醇铝和正硅酸乙酯为原料,采用溶胶凝胶法制备了硅铝杂化高分子,并应用于砂轮磨具结合剂,在金刚石表面包覆该涂层,研究包覆后的抗氧化性能.利用扫描电子显微镜(SEM)、傅里叶变换红外光谱(FT-IR)、X射线衍射仪(XRD)、差示扫描量热-热重分析仪(DSC-TG)等手段对结合剂及包覆金刚石的结构与性能进行了表征,还研究了不同的烧结制度对采用该结合剂制备砂轮磨具试样硬度和抗弯强度等性能的影
本文研究了DFC25预合金粉末的冷压、热压烧结性能,分析了烧结体硬度、抗弯强度等性能.结果表明,DFC25预合金粉末烧结体硬度、抗弯强度随烧结温度升高而升高,热压温度为780℃、压力为20MPa时,烧结体的硬度为52HRB,抗弯强度为748MPa.将该粉末应用于圆锯片的生产,与单质混合粉胎体相比,在锯片的切割速度和寿命基本不变的前提下,可以大幅减少铜、镍等贵金属用量,降低工具制造成本,同时刀头的扳
微晶玻璃是玻璃相和微晶相均匀分布形成的一种新型无机非金属材料,具有较高的机械强度、良好的耐热冲击性、耐磨性和耐腐蚀性等特点,有广泛的应用前景.不断开发微晶玻璃结合剂的新型制备工艺,对于提高砂轮质量具有重要意义.微晶玻璃依据成分的不同可分为:硅酸盐型、铝硅酸盐型、硼酸盐型、氟硅酸盐型。与传统陶瓷结合剂的制备工艺相比,微晶玻璃结合剂的制备多了一个晶化阶段。目前,微晶玻璃结合剂常用的制备方法有:熔融法、
文章重点介绍了近几年国内六面顶压机在增压源、超压及泄压技术上的新进展,详细分析了双作用往复式增压器的原理及应用,展现了比例溢流阀和比例流量阀在超压速度控制中的原理,分析了比例截止阀在慢泄压上的应用.近年来,我国六面顶压机在增压源及超压、泄压控制技术方面已经取得了一定的进步,同时也拓展出更大的发展空间。双作用往复式增压器的应用及超压、泄压控制精度的提高,会满足不断创新的合成新工艺要求,为中国超硬材料
本文主要介绍作者所在实验室研制的基于国产六面顶压机构建的二级6-8型大腔体静高压装置的力学结构、压力标定、温度标定以及采用金刚石复合材料作为二级顶锤产生超高压的一些探索性工作.压力标定结果表明,设计的14/8(传压介质边长/二级顶锤锤面边长,单位为mm)和12/6组装可达到的最大腔体压力约为18GPa,10/4组装的最大腔体压力约为20GPa;温度标定结果表明,三种组装均可在2300K的温度条件下
The value of low CBN content PCBN tool materials has long been recognized in hardened steels machining, and is increasingly seen as a leading solution for nickel and cobaltbased superalloys.This resea
本文研制了单层真空钎焊CBN磨刀轮,利用真空钎焊工艺在Cu基钎料中引入TiH2进行实验分析,对比了不同钎焊温度对CBN产生的影响,使CBN磨粒在适当裸露高度状态下,充分减少其热损伤和应力损伤,并使CBN磨粒、钎料、45#碳钢基体三者之间产生牢固有效的冶金化合,进一步实现真空钎焊CBN磨刀轮的高效磨削.
Hardened steels (45~68HRC) are utilized in a multitude of applications ranging from power traincomponents, bearings, and gear shafts etc.The exceptional hardness, good thermal resistance, and high the