ELID Grinding Technology Research Articles

Grinding point-temperature model of Elid oxide film and its heat transfer and formation mechanism of α-Fe2O3

This paper studies the temperature of the grinding point of an oxide film and establishes a temperature model. The calculation results indicate that the temperature of the grinding point of a single abrasive grain is much higher than that of the grinding zone of the grinding wheel. Based on the analysis of the point-temperature model, the formation mechanism of the composite abrasive grains in an electrolytic in-process dressing (Elid) grinding oxide film is further clarified – that is, under the effect of the high temperature of the grinding point of the abrasive grains, the hydrous ferric oxide (Fe2O3) in the oxide film surrounding the abrasive grains is dehydrated and converted into α-ferric oxide, thus forming the grinding composite abrasive grains centered on grains and surrounded by α-ferric oxide. The results reveal the root causes why an Elid grinding oxide film has a polishing effect, which enriches the Elid grinding technology theory and has extremely important theoretical and practical significance.

717 導電性ラバーボール含有メタル-レジンボンド砥石のELID研削特性(OS7-(4),OS7 オーガナイズドセッション≪精密/微細加工と評価≫)

In recent years, the request of finishing process by fixed abrasive machining has been growing because of the shortage of skilled workers and environmental friendly needs. ELID grinding technology has been developed to meet these social demands. This report is written about ELID grinding performance using Metal-resin bonded wheel conducting electro-conductive-rubber ball. We compared the surface roughness of the cemented carbide alloy that was processed by metal-resin wheel conducting electro-conductive-rubber ball and metal-resin bonded wheel. As a result, better work surface was obtained by using metal-resin wheel conducting electro-conductive-rubber ball.

Research on Cylindrical Precision Machining Adopting ELID Grinding Technology

In order to explore the new way to precision machining of the cylindrical, ELID precision mirror grinding technology are employed to precision ultra-precision grinding experiments. Given ELID precision mirror grinding technology has effectively solved the basis of many of the typical flat-precision machining difficult materials and efficient processing, through the conversion process equipment tools, and optimization of process parameters, obtained when the wheel speed in 16 ~ 20 m / s, when the grinding depth 10μm, cylindrical grinding state is best, which could obtain Ra0.025μm surface roughness of the machined surface.

715 導電性ラバーボール含有メタル-レジンボンド砥石を用いた軟質材料の加工特性(OS7-(4),OS7 オーガナイズドセッション《精密/微細加工と評価》)

In recent years, the request of finishing process by fixed abrasive machining has been growing because of the shortage of skilled workers and environmental friendly needs. ELID grinding technology has been developed to meet these social demands. This report about the processing properties of soft materials using the metal-resin wheel conducting electro-conductive-rubber ball. We compared the surface roughness of the polycarbonate that was processed by metal-resin wheel conducting electro-conductive-rubber ball and metal-resin bonded wheel. As a result, better work surface was obtained by using metal-resin wheel conducting electro-conductive-rubber ball.

알루미나 세라믹스 ELID연삭면의 자기연마 가공 특성

This study has focused on the application of magnetic assisted polishing for ELID ground surface of aluminum oxide ceramics. Aluminum oxide ceramics has been widely used as advanced materials for electric, optic, mechanic, chemical usage and so on. In this study, ELID grinding and magnetic assisted polishing technology was adopted for high-effective manufacturing and high quality surface of ceramic parts. The characteristic of MAP machining have been evaluated by the value of surface roughness and surface profile before and after magnetic assisted polishing. As the results of experiments, the surface roughness after magnetic assisted polishing has shown a significant improvement and the surface roughness was more improved when the feed rate of tool became slow.

The Development and Research of the Special ELID Grinding Machine

ELID grinding technology applied to difficult-to-machine materials’ precision and ultra-precision processing has obtained good results. Based on the existing experimental results of ELID grinding, according to the structure characteristics of the existing grinding machine, we designed and developed a special ELID grinding machine in order to greatly improve the machining precision and automation degree of the existing grinding machine and achieve precision and ultra-precision processing of difficult-to-machine materials.

Study on the Machining Principle and Experiment of Grinding

ELID for SiC which enables the improvement of surface quality is put forward. ELID grinding technology is new technology of ultra-precision grinding, and the oxide film is formed on grinding wheel by electrolytic in-process technology, thus the wheel is in-process dressed. SiC material removal mechanism and ELID grinding mechanism is analyzed, the character and condition of brittle to ductile transition of SiC and surface formation mechanism of ductile mode grinding of SiC are studied, the results show that ELID grinding can realize ductile grinding ,this will lower the surface damage and improve the machining efficiency.

ELID Grinding Technology of Nano-Material Cutting Tool

As ELID grinding technology is characterized by simpleness, practicality, low cost and so on, it is wildly used in ultra-precision sharpening, ultra-precision grinding, ultra-precision polishing and some other fields of difficult-to-cut material. ELID grinding technology was applied in the grinding of cutting tool in this paper, and the cutting tools with nano-grained cemented carbide, common cemented carbide, nanoY-TZP ceramics and some other materials were respectively grinded. Then, the surface quality of their anterior and posterior grinding horns and their edge radius were studied and compared with traditional grinding technology of cutting tool. The results show that the surface roughness and edge radius of nano-grained cemented carbide cutting tool are respectively Ra2nm and 0.3μm, the surface roughness and edge radius of common cemented carbide cutting tool are respectively Ra20nm and 1μm and the surface roughness and edge radius of nanoY-TZP ceramic cutting tool are respectively Ra60nm and 0.2μm after grinding by applying ELID grinding technology, which are far better than that from traditional grinding technology; this further proves that the adoption of ELID grinding technology in the grinding of cutting tool is feasible.

ELID Grinding Technology of Nano-Ceramic Scalpel

As the grain size of nano ceramic has reached nanometer grade, it possesses high hardness, high wear resistance and high toughness. Therefore, the scalpel made by nano ceramic has the virtue of high wear resistance, good corrosion resistance, long service life, non-toxic, non-static, sharp edge and so on, but the processing of this kind of scalpel is extremely difficult. This paper prepares the nano-ceramic scalpel by using ELID grinding technology, and also studies the thickness, surface roughness, edge sharpness of scalpel. The research results show that the thickness of prepared scalpel is 0.3 mm, the surface roughness is 6-60 nm and the edge radius is 200 nm, the cutting experiment on suture shows that this scalpel can meet the requirements of international standard for medical scalpel when the cutting force is less than 0.8 N. This further proves that the ELID grinding technology is suitable for the preparation of nano-ceramic scalpel. The preparation technology and technological equipment of nano-ceramic scalpel are proposed on the basis of above achievements, and this technology possesses promising application prospect.

Research on Minimum Mechanism of Roughness of ELID Grinding

ELID grinding technology is used widely in the precision grinding of hard and brittle materials. The nature of passivating film play an important role in ELID mirror grinding. Spring’s stiffness of passivating film was researched from theory and simulation and experiment. And the theory of the dynamic stiffness of spring was proposed, based on this theory minimum mechanism of roughness of ELID grinding was proposed further, and experimental verification was done. Results show, the spring stiffness of passivating film is change with the grinding paramenter, and when implementing the precision grinding, the elastic deformation of oxide film reduces the exposure and grinding depth of the grinding grains, accordingly, ameliorating the grinding surface quality.

Non-Special Dressing Electrode Experimental Study on ELID Grinding

The traditional ELID Grinding Technology has many limitations in grinding small diameter hole and spherical face. As a solution, a new method for ELID grinding - the fourth generation ELID Grinding Technology, ELID IV, is presented in the recent research. To serve the industrialized application of ELID IV, a series of experiments were performed to reveal principle of ELID IV. Results of these experiments indicated that: (1) electrolyse function is enhanced obviously when the workpiece is connected to the positive pole of the power supply using 45 steel as the material of test piece; (2) the relationship between the effect of electrolysis and the electrode gap is studied by using the 120 # Rail Based grinding wheel on the cemented specimens carbide for electrolytic grinding, and 1mm is determined the best electrode gap.

Research on the Basic Properties of the Bamboo Charcoal Bonded Grinding Wheel

A new BCB (Bamboo Charcoal Bonded) grinding wheel was developed by bamboo charcoal-phenolic resin composite under vacuum for ELID grinding technology. The pyrolysis behavior of the new bamboo charcoal-phenolic resin material was studied by thermo gravimetric analysis (TGA), and structural characterization of the new material was performed by scanning electron microscopy (SEM), X-ray diffraction (XRD), the friction characteristics was also investigated in this paper.

ビオトープ型ＥＬＩＤ研削技術の開発:第３報 加工特性の調査

ビオトープ型ＥＬＩＤ研削技術の開発:第３報 加工特性の調査

1401 水草カーボンを用いた環境調和型ELID研削用砥石の開発(S78-1 高機能研削加工(1),S78 高機能研削加工)

We are studying ways of recycling grinding fluid, supplying grinding fluid and electrode technology in the aim to develop environmentally friendly ELID grinding technology. As one elemental technology of this environmentally friendly ELID grinding technology, we developed a metal free electrode-conductive resionoid bonded wheel using waterweed carbon material as the conductive material. This paper reports the results of investigations on the basic feature of this material for ELID grinding.

The Application of ELID Grinding Technology on External Precision Mirror Surface

The Application of ELID Grinding Technology on External Precision Mirror Surface

The Application of ELID Grinding Technology in Precision and Super-Precision Grinding of Hard and Brittle Materials

The Application of ELID Grinding Technology in Precision and Super-Precision Grinding of Hard and Brittle Materials