scholarly journals Grinding of Maraging Steel Vaco 180 with SiC Grinding Wheels - Grinding Force and Wheel Wear

2019 ◽  
pp. 0641-0645
Author(s):  
Jindrich Farsky ◽  
Tomas Baksa ◽  
Miroslav Zetek
Keyword(s):  
Maraging Steel ◽  
Grinding Force ◽  
Grinding Wheels ◽  
Wheel Wear

Factors Influencing the Performance of Grinding Wheels

1959 ◽  
Vol 81 (3) ◽  
pp. 187-199 ◽  
Author(s):  
E. J. Krabacher
Keyword(s):  
Metal Removal ◽  
Removal Rate ◽  
Grinding Wheel ◽  
Metal Removal Rate ◽  
Grinding Wheels ◽  
Wheel Wear ◽  
Grinding Wheel Wear ◽  
Grinding Ratio ◽  
Material Hardness ◽  
Chip Load

Optimum utilization of grinding wheels can best be achieved if the nature of their performance and wear characteristics, and the factors that affect these characteristics, are understood and applied. As reported in this paper, a comprehensive, continuing, grinding-research program has contributed to such an understanding. A study of the nature of grinding-wheel wear indicates that the grinding-wheel wear curve is similar to those of other cutting tools. It demonstrates further that the type of grinding operation significantly affects the nature of wheel wear. A unique technique has been developed for very accurately measuring grinding-wheel wear. This measured wear may be translated into terms of “grinding ratio,” which is the generally accepted parameter for measuring wheel wear. It is the ratio of the volume of metal removed per unit volume of wheel worn away. Extensive studies have been carried out to determine the effect of mechanical variables on grinding ratio, power required in metal removal, and on surface finish. Experimental findings indicate that grinding ratio decreases with increased metal-removal rate and increases with workpiece diameter, decreased chip load, and increased concentration of grinding fluid. Power is found to increase with both the metal-removal rate and the amount of metal removed. It increases slightly with workpiece diameter and is affected little by work-material hardness. Surface finish is found to improve with decreased metal-removal rate and decreased chip load. It also is affected little by work diameter or work-material hardness. Fundamental research in the mechanics of wheel wear is supplying much additional information in the study of grinding-wheel wear. The measurement of grinding forces employing a cylindrical grinding dynamometer provides the opportunity for relating the wear of grinding wheels to the basic mechanics of the process through such fundamental quantities as grinding forces, specific energy, and grinding friction. Two additional experimental techniques for the study of chip formation in grinding have also proved to be most useful research tools. A “quick-stop” apparatus is used to freeze the grinding action by accelerating a tiny workpiece almost instantaneously to grinding-wheel speed. Another technique permits the comparison of the shape of the grinding grit and that of the contour of its path through the workpiece by a unique replicating method.

The Wear of Grinding Wheels: Part 1—Attritious Wear

1971 ◽  
Vol 93 (4) ◽  
pp. 1120-1128 ◽  
Author(s):  
S. Malkin ◽  
N. H. Cook
Keyword(s):  
Surface Finish ◽  
Grinding Force ◽  
Grinding Wheels ◽  
Precision Grinding ◽  
Grinding Forces ◽  
Workpiece Surface ◽  
Abrasive Grain ◽  
The Subject ◽  
Force Components ◽  
Sliding Force

An investigation of attritious and fracture wear of grinding wheels in precision grinding is described in a two paper sequence. Attritious wear, the subject of this first paper, refers to the dulling of the abrasive grain due to rubbing against the workpiece surface. The amount of dulling, measured by the area of the wear flats on the surface of the wheel, is found to be directly related to the grinding forces. In general, both the vertical and horizontal grinding force components increase linearly with the wear flat area. This is explained by considering the grinding force as the sum of a cutting force due to chip formation and a sliding force due to rubbing between the wear flats and workpiece. Related studies of wheel dressing, surface finish, and workpiece burn are also presented.

Effect of Novel Grinding Wheels on Grinding Performance

2013 ◽  
Vol 405-408 ◽  
pp. 3302-3306
Author(s):  
Ming Yi Tsai ◽  
Shi Xing Jian ◽  
J. H. Chiang
Keyword(s):  
Surface Roughness ◽  
Pure Water ◽  
Minimum Quantity Lubrication ◽  
Grinding Wheel ◽  
Grinding Temperature ◽  
Grinding Wheels ◽  
Wheel Wear ◽  
Grinding Performance ◽  
Conventional Grinding ◽  
Removal Processes

Grinding, a technique for removing abrasive materials, is a chip-removal process that uses an individual abrasive grain as the cutting tool. Abrasive material removal processes can be very challenging owing to the high power requirements and the resulting high temperatures, especially at the workpiece-wheel interface. This paper presents a novel system that uses graphite particles impregnated in an aluminum oxide matrix to form a grinding wheel. This study specifically investigated grinding wheels with a graphite content of 0.5 wt%. The new grinding wheel was compared with conventional grinding wheels by comparing the factors of grinding performance, such as surface roughness, morphology, wheel wear ratio, grinding temperature, and grinding forces, when the wheels were used under two different coolant strategiesdry and with minimum quantity lubrication (MQL) using pure water. This study found that there is a considerable improvement in the grinding performance using graphite-impregnated grinding wheels over the performance obtained using conventional grinding wheels. The use of 0.5 wt% graphite provided better surface roughness and topography, lower grinding temperature, and decreased force; in addition, wheel consumption was lower, resulting in extended wheel life.

Complex Grinding Assisted with Electrical Discharge Machining for Electrically Conductive PCD

2010 ◽  
Vol 126-128 ◽  
pp. 591-596 ◽  
Author(s):  
Manabu Iwai ◽  
Shinichi Ninomiya ◽  
Gaku Sugino ◽  
Kiyoshi Suzuki
Keyword(s):  
Surface Finish ◽  
Electrical Discharge ◽  
Material Removal ◽  
High Efficiency ◽  
Electrical Discharge Machining ◽  
Grinding Force ◽  
Wheel Wear ◽  
Electrically Conductive ◽  
Composite Diamond

A new PCD material named EC-PCD (Electrically conductive polycrystalline composite diamond), which consists of electrically conductive diamond grits, has recently been developed. This paper deals with an investigation of a complex grinding assisted with electrical discharge machining (EDM) to realize high efficiency, low and stable grinding force and low wheel wear for the new EC-PCD. The effect of complex grinding assisted with EDM is compared experimentally with the standard PCD (S-PCD). The result shows that, in the complex grinding, lower and more stable grinding force is realized thanks to the material removal action in EDM and that lower wheel wear and better surface finish are attained, just when the EC-PCD is selected as a workpiece.

Some Aspects of Flat Surface Grinding with Intermittent Cross-Feed

1979 ◽  
Vol 101 (2) ◽  
pp. 135-146 ◽  
Author(s):  
J. K. Banerjee
Keyword(s):  
Wear Mechanism ◽  
Specific Energy ◽  
Flat Surface ◽  
Grinding Force ◽  
Wheel Wear ◽  
Material Combination ◽  
Force Relation ◽  
Wide Range ◽  
Constant Maximum ◽  
Force Equilibrium

Part I: A Wheel Wear Mechanism. Using a constant maximum grit-force hypothesis for a fixed wheel-work combination, a stable and progressive wear-land model is developed as a function of the machine settings and its mechanical and thermal limitations are discussed. Experiments conducted with several wheel-work materials, both during dry and wet grinding justify the proposed wear mechanism and its limitations with respect to the machine settings. Part II: The Force Equilibrium. Under a stable wear mechanism as proposed in Part I, the grinding force is shown to be a simple linear function of a combined machine settings’ parameter; the slope of the line gives, in the range of the machine settings used, a constant specific energy for a given wheel-work material combination. Thermal expansion as well as grit rubbing, while not necessarily altering the basic wear-land geometry, tend to change this force relation. Experimental results over a wide range of the machine settings and for different wheels and workpieces agree with the force relation, and the specific energy calculated therefrom coincides quantitatively with the other published results on similar workpiece materials.

Contact Stiffness of Grinding Wheels due to the Difference of Table Feed Rate

2009 ◽  
Vol 76-78 ◽  
pp. 137-142 ◽  
Author(s):  
Takazo Yamada ◽  
Hwa Soo Lee ◽  
Kohichi Miura
Keyword(s):  
Stationary State ◽  
Feed Rate ◽  
Contact Stiffness ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Abrasive Grain ◽  
Residual Stock ◽  
The Difference ◽  
Stock Removal

Usually, the contact stiffness between a grinding wheel and a workpiece has been measured in a stationary state. So, in this study, the contact stiffness under the grinding operation is measured under different table feed rate of the workpiece. From this result, it is known that, while the contact stiffness in the stationary state increases with the increase of the contact force, the contact stiffness under the grinding operation decreases with the increase of the normal grinding force relating the table feed rate. In this paper, since the number of contacting abrasive grain with workpiece is constant irrespective of the table feed rate, and the residual stock removal of workpiece is varied by the table feed rate, it is clarified that the contact stiffness under the grinding operation differs from the contact stiffness measured by the stationary state.

scholarly journals On the Grinding Performance of Alumina Wheels in Ultrasonic Vibration-Assisted Grinding of Hardened GCr15 Steel

2021 ◽  
Author(s):  
Yutong Qiu ◽  
Biao Zhao ◽  
Yang Cao ◽  
Wenfeng Ding ◽  
Yucan Fu ◽  
...  
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Wear Property ◽  
Wheel Wear ◽  
Machined Surface ◽  
Gcr15 Steel ◽  
Abrasive Grains ◽  
Ultrasonic Vibration Assisted Grinding

Abstract Composite manufacturing with multiple energy fields is an important source of processing technology innovation. In this work, comparative experiments on the conventional grinding (CG) and ultrasonic vibration-assisted grinding (UVAG) of hardened GCr15 steel were conducted with WA wheel. The grinding wheel wear patterns and chips were characterized. In addition, grinding force, force ratio, and ground surface quality were investigated to evaluate wheel performance. Results illustrate that the interaction between abrasive grains and workpiece in UVAG process has the characteristics of high frequency and discontinuity. The wear property of abrasive grains is changed and the grinding force is decreased because the generation of micro-fracture in abrasive grains improves the grinding wheel self-sharpening. Better surface quality is obtained, the surface roughness is reduced by up to 18.96%, and the number of defects on the machined surface is reduced through the superior reciprocating ironing of UVAG. Accordingly, WA wheel performance is improved by UVAG.

scholarly journals Analysis of influence of the mono-crystalline corundum grinding wheel wear on grinding forces and roughness parameters in peripheral surface grinding of 100Cr6 steel

Mechanik ◽  
2018 ◽  
Vol 91 (8-9) ◽  
pp. 702-704
Author(s):  
Marcin Żółkoś ◽  
Witold Habrat ◽  
Janusz Świder ◽  
Elżbieta Socha
Keyword(s):  
Normal Component ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Profile Measurement ◽  
Roughness Parameters ◽  
Wheel Wear ◽  
Grinding Wheel Wear ◽  
Peripheral Surface ◽  
Force Components ◽  
Changes Over Time

The paper presents the experimental study conditions and results of M3X60K5VE01-35 monocorundum with vitrified bond grinding wheel wear in 100Cr6 steel peripheral grinding process. The effect of grinding wheel wear on the values of grinding force components as well as surface roughness parameters was analyzed. The grinding wheel wear was determined by profile measurement of the active grinding wheel surface using an inductive sensor. It was shown that the increase in the normal component of the grinding force during the process can be an acceptable criterion for wear of the grinding wheel due to the quasi-linear changes over time.

scholarly journals Influence of grinding wheel velocity on the wear of electroplated cBN grinding wheel

Mechanik ◽  
2017 ◽  
Vol 90 (8-9) ◽  
pp. 690-692 ◽  
Author(s):  
Andrzej Kawalec ◽  
Anna Bazan ◽  
Marek Krok
Keyword(s):  
Active Surface ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Force Components ◽  
Cbn Grinding Wheel

Presented are the results of research on changes of the grinding force components and selected topography parameters of grinding wheel active surface during grinding wheel life. Electroplated cBN grinding wheels working with different rotation speeds were examined.

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