Ultra-precision grinding of optical glasses using mono-layer nickel electroplated coarse-grained diamond wheels. Part 1: ELID assisted precision conditioning of grinding wheels

作者：Zhao, Qingliang; Guo, Bing^*

来源：Precision Engineering-journal of the International Societies for Precision Engineering and Nanotechnology, 2015, 39: 56-66.

DOI：10.1016/j.precisioneng.2014.07.006

• Optical glasses
• Conditioning
• ELID
• Coarse-grained diamond wheels
• Run-out error

In order to realize Ultra-precision grinding of optical glasses with mono-layer nickel electroplated coarse-grained diamond grinding wheels, a novel conditioning technique was developed using copper bonded diamond grinding wheels with grain sizes of 15 mu m (D15) and 91 mu m (D91), respectively, as conditioners for truing of diamond wheels with grain sizes of 46 mu m (D46), 91 mu m (D91) and 151 mu m (D151), respectively. During the conditioning process, the conditioners were continuously dressed by means of electrolytic in-process dressing (ELID). A force transducer was used to monitor the conditioning force. while a coaxial optical distance measurement system was used to monitor the wheel run-out. In addition, a white-light interferometer (WLI) and a scanning electron microscope (SEM) were used to characterize the successively modified diamond grain morphologies of the conditioned wheels both directly and by a replication technique. The experimental results show that with optimized conditioning parameters, the developed conditioning technique can be applied for truing of coarse:grained diamond wheels within the abrasive layer achieving a constant wheel peripheral envelop surface exhibiting flattened diamond grains with a run-out <2.5 mu m, which is a prerequisite for introducing coarse-grained diamond wheels into ultra-precision machining of brittle and hard-to-machine materials.

• 出版日期2015-1
• 单位哈尔滨工业大学