Papers by Keyword: Diamond Grinding Wheel

Abstract: In this study, a vitrified bond diamond wheel was prepared with alumina bubbles as a pore former. The effect of the size and content of the alumina bubble on the flexural strength, porosity, and hardness of the prepared wheels has been studied. The results showed that the porosity of the grinding wheel samples increased with the rise of the content of the alumina bubble. The porosity of the grinding wheel with finer alumina bubbles is higher than that of the coarser one. The hardness and flexural of the samples with finer alumina bubbles are lower than those with the coarser ones. The research result shows that the content and the size of the alumina bubble have a great influence on the flexural strength and hardness of grinding wheel samples.

Abstract: In this paper, the GC cup truing technology on resin bond diamond grinding wheel is studied, and the parameters of truing the diamond grinding wheel process are optimized. Also the contour accuracy and microscopic topography of the diamond grinding wheel are analyzed quantitatively. Besides, the method of evaluating the dressing effect of diamond grinding with the roughness of grinding wheel is proposed.

Abstract: Conditioning challenges of superabrasive grinding wheels cause a barrier to the extensive applications of these tools. These concerns are more pronounced in the case of conditioning of metal-bonded superabrasive grinding wheels owing to their high bond hardness. Laser ablation has been used as a promising method for conditioning of such tools. In this research an ultrashort pulsed laser was used for efficient profiling of metal-bonded diamond grinding wheels. In order to assess the laser-profiling technique, the experiments were aimed to generate precise profiles which are rather too difficult or impossible to generate with conventional methods. Convex and concave profiles with minimum radius of about 20 μm and 40 μm, respectively are produced successfully via laser conditioning.

Abstract: The possibility of using the new processing technique of vacuum evaporative pattern casting (V-EPC) process to fabricate the Al-Si based bonded diamond grinding wheels was explored in this paper. Distribution of diamond grits in the diamond/EPS composite pattern and in the grinding layer of the cast of the grinding wheel were analyzed. Microstructures and mechanical properties of the metal bonds and diamond composites fabricated by V-EPC process were studied. It is confirmed that thermal damage of the diamond grits did not occur. Strong bonding between metal bond and diamond grits can be produced. However, the uniformity of the distribution of diamond grits in the metal matrix should be further improved. Also, further hardening on the metal bond is necessity by trying other kinds of aluminum alloys.

Abstract: A grinding wheel wears rapidly during ultrasonic assisted surface generation of a large aperture aspherical RB-SiC mirror, which leads to an increase of grinding force and profile error. In this paper, different types of resinoid bonded diamond grinding wheel with a same grit size were dressed with high-pressure abrasive water jet. The dressing effects of abrasive water jet were assessed through comparing the 3D roughness of the grinding wheel topographies before and after dressing. The experimental results show that diamond grits of a worn grinding wheel are protruding from bond after dressing. The feed rate of nozzle and the bond materials have significant impact on the 3D surface roughness of the wheel and dressing efficient. The softer binder and the decrease of the feed rates and lead to deeper grooves during dressing of grinding wheel. However, too low feed rate will make a large number of abrasive particles drop from binder, which worsens the wheel topography. Therefore, to dress grinding wheel well and efficiently, optimized feed rate must be chosen.

Abstract: There are many methods of diamond wheel dressing,broadly divided into mechanical dressing and special processing trimmed two categories.This article describes several different EDM dressing diamond grinding wheel technology and divided into two categories namely:different medium EDM dressing diamond grinding wheel and EDM assisted dressing diamond grinding wheel technology. Summarize recent wheel dressing technology research advances at home and abroad.Elaborated EDM dressing key issues to be addressed, and further research.

Abstract: The results of investigation in order to increase the efficiency of using diamond-abrasive and edge tool made of superhard materials (SHM) on the basis of 3D methodology of complex research of the interrelated processes of their manufacturing and operation are presented. Creation of 3D simulation methodology of processes of sintering of abrasive-diamond tools and processes of grinding of edge SHM tools with their application allows us to increase considerably the reliability of obtained results, to reduce the extent of experimental studies for determination of optimum conditions for grinding and to develop new technologies, tools and equipment. The scientific hypothesis about the expediency of using diamond powders with thick metal coatings in diamond-abrasive tools on metal bonds are proposed and proved on the basis of theoretical research. The research results are implemented as a number of grinding techniques with controllable cutting relief of the wheels and devices which realize them. Using the results of the research makes it possible to increase the reliability of the edged tool made of SHM as far back as at the stage of its sharpening.

Abstract: Issues related to processing modern high-strength composites have been discussed. The reasons for degradation of performance of metallic binder diamond tools in traditional processing are highlighted. Design solutions for practical modernization of general-purpose metal-grinding equipment are offered. Advantages of combined diamond tool processing are defined to provide effective applica

Abstract: In diamond wheel precision grinding process, the grinding force of nanoceramic coating materials can be divided into single grain grinding force and wheel unit area grinding force, this paper studied the two grinding force, results showed that, with the increase of grinding depth, grinding wheel per unit area grinding force and single grain grinding force increased. The two kinds of grinding force increased also with the increase of workpiece feeding speed, the normal grinding force and the tangential grinding force decreased with grinding wheel speed increase. grinding parameters, as diamond wheel grit size and binder type, effected also on the grinding force.

Abstract: Precision grinding experiment and process optimization of YG3 cemented carbide materials was conducted with various grinding parameters using resin-bonded diamond grinding wheel. Different rotation speed of workpiece, feed rate and grinding depth were chozen in precision cross grinding. Surface roughness was measured for studying the removal mode and grinding charateristics. A set of ideal grinding parameters of YG3 cemented carbide were obtained by changing the process parameters. The research result has guiding significance for reducing the wheel wear and processing costs, improving grinding quality and efficiency while precision grinding hard and brittle materials.