The Grinding Wheel Performance in the Transverse Cylindrical Grinding of an Eutetic Alloy

Abstract

This paper presents a research in which the performance of two different grinding wheels (a conventional and a CBN wheel) was evaluated in a transverse cylindrical grinding of a eutectic alloy. Three cutting conditions were tested: rough, semi-finishing and finishing. As evaluating parameters, the cutting force, the roughness and the wheel wear were measured. As a result, the best values of the cutting force and the roughness were obtained when grinding with the conventional wheel, due to the best dressing operation performed, for all the cutting conditions. The CBN presented the best G ratio values. Although, the G ratio values observed for the CBN wheel were lower than the expected one due to the non-effective dressing operation applied. In the conditions tested, in terms of cutting force and roughness, the conventional wheel is the best choice. In terms of G ratio, a cost analysis is crucial to determine if the differences observed among the wheels can justify the use of the CBN wheel. In a positive case, the dressing operation must be improved

The effect of the grinding wheel modification on the state of the workpiece surface layer after internal cylindrical grinding of steel C45

“…Below is an explanation of the symbols from the redundancy 3 The simplified formulas (2) and (3) were used in the tests and their final form was as follows…”

“…Moreover, rising temperature in the grinding zone causes excessive wear of the abrasive grains and bond bridges. [2][3][4][5] Usually the minor difference between the diameter of the grinding wheel and that of the ground opening makes it considerably difficult to provide the grinding fluid (GF) into the grinding zone. The most frequently used flood method does not guarantee even provision of the GF, whose efficiency decreases as the grinding wheel moves deeper and deeper into the hole.…”

“…Due to the small size of the grinding wheel it is not possible to use more advanced GF provision techniques in such processes, such as the pressure provision method or the shoe-nozzle method, which is possible in the case of flat surface grinding or internal cylindrical grinding. [2][3][4][5] The long path of contact also contributes to the creation of clogs made from the machined material on the GWAS, especially with the increased high material removal rate. This is as a result of the slower transportation rates for grinding products outside the grinding zone in the intergranular spaces.…”

“…The clogs, apart from causing an obvious decrease in the grinding wheel cutting capacity, also increase surface friction and contribute to the temperature increase in the area of contact with the machined surface. [2][3][4][5] The conditions in the grinding zone are influenced by a number of factors, including the type, properties and condition of the workpiece, as well as the machining environment (the type, allowance and method of provision of the GF), grinding wheel properties (stiffness, vibrations), machining parameters, the method of preparation of the GWAS, and its condition before the machining and the grinding wheel construction. It seems that one of the most efficient and most costeffective ways of improving the grinding efficiency is modifying the grinding wheel structure.…”

Optimum creep feed grinding process conditions for Rene 80 supper alloy using neural network

“…Higher cutting speed can cause the increase of force and cutting power, as well as a great heat generation in the grinding zone. 1 The heat can be reduced by using a high coolant flow rate and adequate pressure, which contributes to the reduction of the generated heat and easily remove the chips from the grinding zone. 2,3 One of the most important applications of creep-feed grinding is the production of the aerospace parts used in jet engines such as turbine vanes, and blades where parts should have high strength to the fatigue loads and creep strains (see Fig.…”