Influence of oxide layer on grinding quality in ELID grinding bearing outer ring raceway with workpiece-cathode

2019 ◽  
Vol 105 (7-8) ◽  
pp. 3045-3056
Author(s):  
Zhiqiang Wang ◽  
Chengzu Ren ◽  
Guang Chen ◽  
Xiaofan Deng ◽  
Chunhui Ji
Keyword(s):  
Oxide Layer ◽  
Outer Ring ◽  
Elid Grinding

Principle and Method for Oxidation Layer Measurement in Electrolytic In-Process Dressing (ELID) Grinding

2011 ◽  
Vol 301-303 ◽  
pp. 515-519
Author(s):  
Bao Ji Ma ◽  
Yin Xia Wang
Keyword(s):  
Oxide Layer ◽  
Measurement Method ◽  
Current Sensor ◽  
Laser Sensor ◽  
Calculation Methods ◽  
Method Evaluation ◽  
Elid Grinding ◽  
Inner Surface ◽  
Variation Characteristics ◽  
Measurement Principle

Based on the analysis of formation and variation characteristics of oxide layers in ELID grinding, a new measurement principle and method for oxide layer measurement in ELID grinding was proposed. The thickness of the oxide layer was obtained based on measurement both outside surface and inner surface of the oxide layer by laser sensor and eddy current sensor. Calculation methods for measurement of the oxide layer in different ELID grinding periods were presented. In order to verify the correctness of the measurement principle and measurement method, evaluation experiments were down. Results show that the precision of the measurement is sufficient to be applied in ELID grinding.

A study on the equilibrium condition of the oxide layer in ELID grinding

2010 ◽  
Vol 3 (1) ◽  
pp. 25 ◽  
Author(s):  
Indraneel Biswas ◽  
A. Senthil Kumar ◽  
Mustafizur Rahman
Keyword(s):  
Oxide Layer ◽  
Equilibrium Condition ◽  
Elid Grinding

CONTROL OF SURFACE MODIFIED LAYER ON METALLIC BIOMATERIALS BY AN ADVANCED ELID GRINDING SYSTEM (EG-X)

2006 ◽  
Vol 20 (25n27) ◽  
pp. 3605-3610 ◽  
Author(s):  
MASAYOSHI MIZUTANI ◽  
JUN KOMOTORI ◽  
KAZUTOSHI KATAHIRA ◽  
HITOSHI OHMORI
Keyword(s):  
Oxide Layer ◽  
Surface Properties ◽  
Photoelectron Spectroscopy ◽  
Titanium Implants ◽  
X Ray ◽  
Elid Grinding ◽  
Modified Layer ◽  
Surface Modified ◽  
Grinding System

The biocompatibility of titanium implants with different surface properties is investigated. We prepared three types of specimens, one ground by the newly developed ELID grinding system, another ground by conventional ELID grinding, and the other polished by SiO 2 powder. These surfaces were characterized and, the number of cell and cytotoxicity in in-vitro were measured. Energy Dispersive X-ray Spectroscopy (EDS), X-ray Photoelectron Spectroscopy (XPS) and Transmission Electron Microscope (TEM) revealed that the modified ELID system can create a significantly thick oxide layer and a diffused oxide layer, and also can control the thickness of a modified layer. The results of cell number and cytotoxicity showed that the sample ground by the modified system had the highest biocompatibility. This may have been caused by improvement of chemical properties due to a surface modified layer. The above results suggest that this newly developed ELID grinding system can create the desirable surface properties. Consequently, this system appears to offer significant future promise for use in biomaterials and other engineering components.

Surface Finishing for Biomaterials: Application of the Elid Grinding Method

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1395-1400 ◽  
Author(s):  
Masayoshi Mizutani ◽  
Jun Komotori ◽  
Jin Nagata ◽  
Kazutoshi Katahira ◽  
Hitoshi Ohmori
Keyword(s):  
Oxide Layer ◽  
Ground Surface ◽  
Surface Finishing ◽  
Oxide Layers ◽  
Elid Grinding ◽  
Grinding Method ◽  
Transmission Electron ◽  
Finished Surface ◽  
Thick Oxide Layer

Conventional biomaterials, such as titanium alloys, require enhanced chemical stability and wear resistance, which are dependent on the quality of the surficial oxide layer. However, it is very difficult to produce a sufficiently homogenous oxide layer by polishing using isolation abrasive alone. In our previous study, we proposed a new electrical grinding method (ELID grinding). The process improves oxide formation on the finished surface, resulting in finished surfaces with very thick and potentially stable oxide layers. In this study, to ensure the fabrication of surface with desirable characteristics for biomaterials, three types of specimens, which were processed with different surface finishing methods were prepared. Processed surfaces were analyzed by using an Energy Dispersive X-ray analyzer (EDX). To measure the thickness of surface oxide layers, detailed observation were performed by using a Transmission Electron Microscope (TEM). Although the ELID ground surface shows a higher value of surface roughness, excellent corrosion resistance was observed as compared with the samples finished by polishing. This is because of the formation of a thick oxide layer on the finished surface by ELID grinding. Consequently, ELID grinding appears to offer significant future promise for use in biomaterials and other engineering components subjected to the corrosion process.

The ELID Grinding of CoCrMo Alloy Bioprosthesis and the Formation Mechanism of its Corrosion-Resistant Oxide Layer

2018 ◽  
Vol 934 ◽  
pp. 140-144 ◽  
Author(s):  
Ji Cai Kuai ◽  
Cheng Ran Jiang ◽  
Jiang Wei Wang ◽  
Dmitrii V. Ardashev
Keyword(s):  
Oxide Layer ◽  
Formation Mechanism ◽  
Low Cost ◽  
Medical Field ◽  
Cocrmo Alloy ◽  
Corrosion Resistant ◽  
Elid Grinding ◽  
Grinding Method ◽  
Biological Environment

CoCrMo alloy is widely used in the medical field to make Biomedical prosthesis,But it is difficult to process resulting in the high cost of Biomedical prosthesis, Find an efficient and low-cost processing method has become a problem to be solved. In this paper, CoCrMo alloy Biomedical prosthesis were fabricated by Electrolytic In-process Dressing grinding. We studied the ELID grinding performance, grinding force, surface quality and the formation mechanism of Corrosion-resistant oxide layer of CoCrMo alloy by using dynamometer, roughness tester, XRD and SEM. It is proposed that the ELID grinding method forms an oxide layer on the surface of the prosthesis, which increases the corrosion resistance and biocompatibility of the prosthesis so that it can be better adapt to the biological environment in vivo. It was further confirmed that the ELID grinding method is an effective method for manufacturing CoCrMo Alloy Bioprosthesis.

A Fundamental Study on Optimal Oxide Layer of Fine Diamond Wheels during ELID Grinding Process

2006 ◽  
Vol 304-305 ◽  
pp. 176-180 ◽  
Author(s):  
Y. Dai ◽  
Hitoshi Ohmori ◽  
Wei Min Lin ◽  
D. Jiang
Keyword(s):  
Oxide Layer ◽  
Material Removal ◽  
Interface Layer ◽  
Optimal Thickness ◽  
Wheel Surface ◽  
Fundamental Study ◽  
Elid Grinding ◽  
Starting Point ◽  
Fine Diamond ◽  
Quality Surface

In ELID (Electrolytic In-process Dressing) operations, the setting of starting point is quite important for reducing waste of time and for achiving high quality surface. In this study, the authors proposed a new describing mode for ELID grinding. The oxide layer formed on the wheel surface was divided to four sub-layer: porous-layer, polishing-layer, grinding-layer and interface-layer. The influence of the oxide layer on material removal rates and surface properties was investigated. It was found that, olny the oxide layer with thickness less than 24'm has capability of material removal. In ELID grinding, optimal thickness of the oxide layer is about 8~9'm. And the oxide layer with thickness of 4~9'm is suitable for grinding.

A comparative study on state of oxide layer in ELID grinding with tool-cathode and workpiece-cathode

2017 ◽  
Vol 94 (1-4) ◽  
pp. 1299-1307 ◽  
Author(s):  
Zhiqiang Wang ◽  
Chengzu Ren ◽  
Guang Chen ◽  
Lifeng Zhang ◽  
Xiaofan Deng
Keyword(s):  
Comparative Study ◽  
Oxide Layer ◽  
Elid Grinding
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