Types Of Diamond Tools Research Articles

High-Efficiency Materials-Processing Technology Based on New Types of Diamond Tools

Examples are presented of the successful application of new types of diamond tools for high-efficiency processing of a wide class of materials such as glass, ceramic, sapphire, semiconductor materials, and different metals. The advantages of a bonded diamond tool based on heat-conducting polymer composite are shown.

Basic Study on Micro V-Groove Cutting of Tungsten Carbide Using Diamond Tools

Micro V-groove cutting of cobalt-free tungsten carbide using two types of V-shaped diamond tools is performed using mist of zinc dialkyl-dithiophosphate (ZnDDP) as lubricant. The two types of tool tested are 1) mono-crystalline diamond and 2) poly-crystalline diamond made of approximately 30 nm-sized diamond crystals. The geometry of the V-groove-cutting process is theoretically investigated and the relationship between V-groove angle, original rake angle, and effective rake angle is clarified. Through the cutting experiments, the effects of diamond types and rake angle on tool-wear characteristics are explained. When rake angle is set at zero degrees, tool chipping frequently occurs for both types of diamond tools even when ZnDDP is supplied. However, when rake angle is set at -30 degrees for poly-crystalline diamond, tool wear is minimized.

Development of functional surface by nano-plastic forming

A new nano-fabrication process by a direct imprinting method, named as nano-plastic forming, is developed. Three types of diamond tools were used for nano-plastic forming test; a knife-edge type tool, a multi-point tool and a nano-structured tool. These tools were used to imprint structures on soda glass and quartz glass by using a specially designed nano-plastic forming device. Experimental results confirm that the nano-structures can be fabricated by the nano-plastic forming technique even for hard–brittle materials. Imprinted structures were analyzed by an SEM and FIB. Surface properties of nano-structured glass plates were evaluated by a friction tester and an optical transmittance tester. Results of friction test show that friction properties vary with pitch and depth of grooves. Also, results of optical test show that the tool geometry and forming conditions influence the wavelength dependence of optical transmittance. These results indicate that friction and optical properties can be controlled by nano-plastic forming technique.

New types of diamond tools for machining of refractories

The results of the development of several types of grinding tools of a large diameter (up to F700 mm) for treatment of high-alumina and periclase refractories are described, as well as the development of special drills for obtaining core samples from refractories in accordance with the certification requirements, profiled mills for treating corundum-graphite products without cooling.

An Experimental Study of Specific Energy in Grinding Granite

An investigation is reported of the characteristics of specific energy in grinding of granite using diamond abrasives. The effects of many parameters, such as the types of diamond tools, the types of abrasives, the properties of granite, the conditions of lubrication, and the working conditions of diamond tools, were studied. The power consumed in grinding was measured in order to obtain the specific energy, which is defined as the energy expended per unit volume of material removal. It is found that the specific energy for grinding of granite was closely related to the removal mechanisms of granite, the failure modes of diamonds and the interactions of the swarf with the applied fluid and bond matrix.

Nano Forming of Glasses by Indentation

This paper reports ultra fine plastic forming (nano forming) of hard brittle materials by indentation of diamond tools. Soda glass, firelite glass and quartz glass were examined by a nano indentation tester specially designed for this study. Two types of diamond tools were used for the experiment : one was a knife edge type tool and the other was a stamp type tool which was machined by a focused ion beam equipment. Indentation tests by the knife edge tool showed that glasses are available for ductile plastic deformation where no cracks are generated when indentation depth is smaller than their critical depth. Deformation characteristics of nano forming were found to be almost similar to macroscopic plastic work even on a hard brittle material. Indentation test of the stamp type tool succeeded in fabricating dot array structures on the glasses. Deformation of work material was however not uniform but depth of dots and density of cracks were distributed in a imprinted structure. Such distributions were explained by stress variation under the tool in imprinting.