微小刀具同轴全息对刀方法研究

针对现有对刀方法存在的各种不足,提出了一种微小刀具的同轴全息对刀方法。在对全息成像原理和全息图像关键问题进行研究与分析的基础上,搭建了一套微细铣刀的全息对刀检测装置,并利用标准刀具在五轴加工中心进行了微细铣刀的对刀测量试验。试验结果表明:该对刀装置能够高效地进行微细铣刀的对刀检测,系统相对检测精度达5.1μm。在相同检测条件下,与高精度机外预调仪的测量结果相比,接触式对刀仪的相对误差为0.033%,而全息对刀样机的相对误差为0.007%,后者更能有效地实现微小刀具的对刀检测。该结果验证了微小刀具的同轴全息对刀方法的可行性,即全息测量可用于微细铣刀的高精度对刀。

Study on Tool Setting Method of Micro-Milling Tool Based on in-Line Holography

In view of the shortcomings of the existing tool setting methods,we proposed a new method of tool setting for micro-milling tools based on in-line holographic imaging.After researching and analyzing the holographic imaging principle and key problems of holographic image,a set of digital holographic tool setting prototype was built,and the micro-milling tools was measured on a five-axis machining center using a standard tool.The experimental results show that,the holographic tool setting prototype can effectively realize the detection of micro-milling tools,and the relative accuracy of this instrument is 5.1μm.Under the same detection conditions,compared with the measurement results of a high-precision external presetter,the relative error of the tool setting instrument is 0.033%,while the relative error of the holographic tool setting prototype is 0.007%,and it can effectively realize the detection of micro-milling tool.This results verify that holographic imaging method can be used for the high-precision tool setting of micro-milling tools.