A Study Of The Ultra Precision Grinding Process On

A study of the ultra precision grinding process on a ...

ELSEVIER WEAR Wear 195 (1996) 74-80 A study of the ultra precision grinding process on a magnetic disk substrate-development of new bonding materials for fixed abrasives of grinding stone Y. Tomita a, H. Eda b Graduate school of lbaraki University, 4-12-I Nakanarusawa-machi Hitachi-shi, Ibaraki, Japan b Department of System Engineering, Faculty of Engineering, Ibaraki University, Ibaraki ...

A study of the ultra precision grinding process on a ...

A study of the ultra precision grinding process on a magnetic disk substrate—development of new bonding materials for fixed abrasives of grinding stone. ... report is to develop the new bonding resin for fixing 3–41 μm SiC abrasives in grinding stone that generates the ultra precision …

(PDF) A study of the ultra precision grinding …

A study of the ultra precision grinding process on a magnetic disk substrate—development of new bonding materials for fixed abrasives of grinding stone

A study on ELID ultra precision grinding of optical …

In-process self dressing may happen in precision grinding of optical glass for a fine grit size resin bond wheel while blunt abrasive grits and resin bond material are worn out to expose new abrasive grits. The effectiveness of self dressing using a resin bond wheel needs to be investigated.

Study on ultra-precision magnetic abrasive …

This research proposed a new ultra-precision MAF process using low frequency alternating magnetic field, the results of this study can be summarized as follows: (1) Magnetic flux density decreases gradually from the outer diameter of magnetic pole ( x =±6 mm) to the center of pole ( x =±2 mm), and produce a maximum value at the pole edge ( x =±7.5 mm).

A study of the total thickness variation in the …

A kinematic analysis and experiments into the grinding of ultra-precision substrates using a vertical-spindle surface grinder have been carried out. Scratch marks on the wafer surface indicate the speed ratio of the grinding parameters. The grinding passes …

An experimental and theoretical analysis of surface ...

19-5-2018· This paper presents an experimental and theoretical study of surface generation in the ultra-precision grinding of hard and brittle materials. The study takes into account the material properties, the relative vibration between the grinding wheel and the workpiece, the machining parameters and the phase shift of the grinding process. The Taguchi approach is employed to study the influence of ...

Ultra-high Precision Grinder - YouTube

12-7-2013· Japan's Subaru is one of the world's most technologically advanced telescopes. This week, we meet a Takumi, or innovator, who played a key role in its creation. He made the grinder that polished ...

Basic Study on High Efficiency Ultra-Precision …

The demand for large aperture lenses with high surface quality and form accuracy used for single-lens reflex cameras has been increasing. Generally, large aperture glass lenses are produced by ultra-precision grinding. Considering the increasing global competition, the grinding process has to be improved. However, highly efficient grinding causes worse surface quality, which leads to much ...

A study on the diamond grinding of ultra-thin …

8-8-2011· Sato, H., Tian, Y. B., Shimizu, J., Zhou, L. Study on ultra-precision machining process of silicon-based etalon: effects of diamond grinding on breakage of ultra-thin etalon. In Proceeding of the 3rd Asian Symposium for Precision Engineering and …

Basic Study on High Efficiency Ultra-Precision …

To enhance the precision and productivity of ultra-precision aspheric surface micro-lens, we present an ultra-precision grinding system and process for the aspheric surface micro-lens.

Fabrication of Micro V-Grooves in Ultra-Precision …

Ultra-precision grinding is an effective method to machine the optical micro v-groove, which is one of microstructures applied to the fiber-optics connectors, displays and other photonics devices. The ultra-precision grinding technology directly obtains high surface quality for brittle materials when the grinding process is under the ductile mode.

Grinding Process Aspheric - family-foto.cz

Study on Ultra-Precision Grinding Processing for Aspheric Glass . 2019-11-22· lithography process is commonly used, for instance, in the semiconductor industry; however, the manufacturing costs are high, the processing time is quite long, and spherical aberration is a problem.

Ultra-Precision Grinding | Scientific.Net

Journal of Biomimetics, Biomaterials and Biomedical Engineering Materials Science. Defect and Diffusion Forum

An experimental and theoretical analysis of surface ...

This paper presents an experimental and theoretical study of surface generation in the ultra-precision grinding of hard and brittle materials. The study takes into account the material properties, the relative vibration between the grinding wheel and the workpiece, the machining parameters and the phase shift of the grinding process. The Taguchi approach is employed to study the influence of ...

(PDF) A Study on Ultra Precision Grinding of …

Also, the ultra-precision grinding process was investigated under this condition by experiment. Rhenium-iridium (Re-Ir) coating was applied on the ground surface of the tungsten carbide molding core.

Experimental study on ultra-precision grinding ...

In this article, ultra-precision grinding characteristics of WC-Ni hard metals were investigated based on the wafer rotation grinding method using #120, #600, #2000, and #12000 diamond cup wheels ...

A Study on the Optimum Condition Selection of …

A Study on the Optimum Condition Selection of Rotary Dressing System of Ultra-Precision Centerless Grinding Machine for Ferrule Article in Key Engineering Materials 291-292:189-194 · January 2005 ...

A study of the total thickness variation in the …

A study of the total thickness variation in the grinding of ultra-precision substrates A study of the total thickness variation in the grinding of ultra-precision substrates Tso, Pei-Lum; Teng, Chieng-Chung 2001-10-24 00:00:00 A kinematic model of the grinding of ultra-precision substrate with a rotary-table vertical-spindle surface grinder is developed to calculate the scratch of a single ...

A Study on the Optimum Condition Selection of …

The optimum condition selection of rotary dressing operations using Hall and AE sensor is presented. The acquired current signals from a hall sensor were studied as one of the method to obtain the optimum condition of dressing and the correlations between dressing condition and AE signals were also evaluated with the root mean square (RMS).

A study on the diamond grinding of ultra-thin …

The demand for ultra-thin silicon wafers has escalated in recent years with the rapid development of miniaturized electronic devices. In this work, diamond grinding for thinning silicon wafers was carried out on an ultra-precision grinding machine. The thinning performance and the minimum wafer thickness were investigated under different grinding conditions.

New Tool Concepts for Ultra-Precision Grinding ...

This paper presents advanced tools for ultra precision grinding which offer a high wear resistance and can be used to generate high-quality parts with an ultraprecise surface finish. The first approach features defined dressed, coarse-grained, single layered, metal bonded diamond grinding wheels. These grinding wheels are called Engineered Grinding Wheels and have been dressed by an adapted ...

Ultra-precision grinding of AlON ceramics: …

Ultra-precision grinding of AlON ceramics: Surface finish and mechanisms Article in Journal of the European Ceramic Society 39(13) · May 2019 with 24 Reads How we measure 'reads'

A Study On Ultrafine Grinding Of Silica And Talc …

The Study Of Silica And Talc Ultrafine Grinding A study on ultra fine grinding of silica and talc in opposed fluidized bed jet mill. by.vibration mill, stirred mill, jet mill and planetary mill experienced mechanochemical effect during the fine grinding process, which agrees with

Back Grinding Process Ppt - waermepumpe …

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Grinding marks on ultra-precision grinding …

Grinding marks are regard as a great obstacle to manufacture spherical and aspheric surfaces with higher surface quality, lower energy and wastage. The scallop-height was studied for optimizing the grinding parameters firstly to reduce its effect on grinding marks. Secondly, the expression of grinding points distribution was established to characterize the grinding marks caused by the radial ...

Study on ultra-precision grinding of micro …

/ Study on ultra-precision grinding of micro aspherical surface (3rd report) - Micronizing of aspherical surface in inclined rotational grinding. In: Seimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering. 1998 ; Vol. 64, No. 9. pp. 1350-1354.

A Study of Mold Grinding and Pressing …

This study investigated the following two issues using the design of experiment (DOE): (1) grinding conditions of tungsten carbide (WC) mold to fabricate aspheric glass lenses for the megapixel camera phone module and (2) pressing conditions in the molding process using the mold fabricated under the optimum conditions found by DOE.

Ultra-precision grinding machine design and …

Complex structural components with small concave surfaces are widely needed in aerospace, optics, and electronic industry. On account of the interference between grinding wheel and workpiece and small concave surfaces, traditional grinding machine cannot realize the grinding process; hence, a specialized grinding machine tool with on-machine electric discharge truing function is needed.

Analytical Elastic–Plastic Cutting Model for …

In this study, an improved model for analyzing the grain depth-of-cut in ultra-fine rotational grinding is proposed, in which the minimum grain depth-of-cut for chip formation, the equivalent grain cutting tip radius, elastic recovery deformation in cutting process, and the actual number of effective grains are considered in the prediction of the ultrafine rotational grinding of brittle materials.

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