Abstract This study here by presents a method for comparative assessment of grinding wheels during the grinding process of hard-to-cut materials. The method in question consists of carrying out a short grinding cut in plunge grinding kinematics using grinding wheels with a customized macro-geometry upon the active surface. The work presents examples of this method’s efficacy when applied to the...

A mathematical description of grinding processes used in powder technologies is developed. A grinding equation, an operator equation, connecting the final particle size distribution function to the particle size distribution function before the grinding process is studied. The mathematical model introduced here can be used to predict the results of grinding, to construct grinding systems with d...

This paper investigates experimentally the effect of compressed cold air (CCA) and vegetable oil on the surface integrity and residual tresses of ground tool steel components. It shows that CCA can reduce grinding temperature and produce a compressive residual stress up o the grinding depth of 30 m. CCA can also improve surface finish while keeping grinding forces low. Oil was found to be more ...

INSTRUCTIONS The technology for ultra-precision machining has been developed rapidly and steadily. In recent years, the demand for free form, complex and microscopic cutting has increased as a result of the need for highvalue-added fabrication for items such as high NA glass lenses, micro-grooves, diffractive aspheric lenses and other optical components. The ultra-precision machine for cutting ...

The effects of type of grinding of barley and dehydrated alfalfa (DA) were tested in rabbits weaned at 35 d of age with an average BW of 846 ± 93 g. Four nonmedicated diets were arranged in a 2 × 2 factorial structure, with type of grinding (coarse grinding with a 4.5-mm screen or fine grinding with a 1.5-mm screen) of barley (TGB) and DA (TGDA) as the main factors. A total of 1,056 mixed-sex r...

Grinding hardening can obtain effect besides fine machining on the surface of workpiece. A certain degree micro-damage will be formed during grinding process which mainly contains micro-crack, melting coating, decarburization, and scratch. In order to study hardening, paper carries a experiment characteristics are observed. The generation mechanism micro-crack is revealed. It by accumulation di...

The management and control of food waste is currently seen as a growing concern; anaerobic digestion promising alternative for the valorization waste. This study evaluates effect application three pretreatments (grinding, pH control, thermal treatment) organic load employing high alkalinity inoculum methane production through BMP tests, using Taguchi L8 experimental design 4 factors 2 levels, r...

copper smelting slags are hard materials. therefore,to recover their copper by flotation method, grinding should be carried out to obtain optimal particle size. copper smelting slags in the bardeskan district, with work index of 16.24 kwh/st, were grinded for 65 minutes to reach an acceptable degree of freedom for the flotation tests, with particle size of 80%, smaller than 70 μm. with this gri...

Among various sunscreen materials, zinc oxide and titanium dioxide are excellent physical components; however, these two materials tend to aggregate form micrometer-sized particles that may impact their performance. This study utilizes fine grinding techniques break up the aggregated into small nanoparticles with a narrow size distribution averaging around 200 nm in diameter. The ground exhibit...