(2) Grinding forces can be significantly reduced (up to 65.6% of normal grinding force, up to 47.7% of tangential grinding force, and up to 42.2% of cross feed directional grinding force) by introducing ultrasonic vibration into micro end grinding of silica glass

In this paper the effects of dynamic changes in the grinding force components due to changes in the grinding wheel wear flat area and the workpiece material on the vibration behavior of the grinding spindle are studied. The steady-state dynamics and vibration behavior of the grinding machine spindle is simulated by a five degree of freedom model

Dec 27, 2013 Because it reduces forces and temperatures, vibration-assisted grinding has the potential to improve the feasibility of dry grinding. This paper presents an experimental study of force and temperature effects in dry and wet grinding at vibration frequencies below ultrasonic. Based on a moving line heat source model, heat flux quantities were estimated from subsurface temperature

Grinding force ratio is a parameter that gives indirect information about the efficiency of grinding. Force ratio is defined as: (2.8) = F t / F n grinding force ratio. When grinding with sharp wheels grinding force ratio is high since normal force is low compared to tangential force. Conversely, when grinding with blunt wheels grinding

Apr 01, 2015 The external interference and vibration can seriously affect the machining errors in brittle materials grinding process. This paper proposes a new model to analyze the relationship between surface roughness (SR) and subsurface damage (SSD) depth on the basis of grinding kinematics analysis and indentation fracture mechanics of brittle materials taking the wheel spindle vibration into account

Jun 01, 2021 To date, many investigations on the effects of amplitude on grinding forces [18,19], surface roughness and processing damage [, , , ] show that abrasive interference trajectory and vibration impact on a workpiece's surface under different amplitudes are the key factors that determine whether ultrasonic vibration-assisted machining can improve

2.2. Vibration Modeling of the Flat Surface Grinding Process. A free-body diagram of the flat surface grinding process with forces acting on the grinding wheel and the workpiece is indicated in Figure 2.There is a normal grinding force (), which acts due to the chip formation, and a normal grinding force (), which acts due to the friction between the wheel and the workpiece in the normal

Effect of grinding forces on the vibration of grinding ... Nov 01, 2000 The grinding machine spindle is one such system where vibration causes major problems in the grinding process as the grinding wheel depth of cut is so small that even the slightest amplitude of vibration can have dramatically damaging effects

The effect of grinding-wheel eccentricity on grinding forces, wheel wear and final waviness height was studied. Eccentricity was evident in force oscillations and acceleration and audio measurements. A model was developed to predict final scallop-profile shape from grinding parameters and eccentricity

Vibration can cause changes in tendons, muscles, bones and joints, and can affect the nervous system. Collectively, these effects are known as Hand-Arm Vibration Syndrome (HAVS). Workers affected by HAVS commonly report: attacks of whitening (blanching) of one or more fingers when exposed to cold. tingling and loss of sensation in the fingers

The theory developed by Entwistle was based on a model of the grinding force that had been developed for non-vibrating conditions [5]. If the effects of ploughing and sliding are ignored, the force is given by:P t = u ch V w lb V g and P n =k 1 P t(1)where P t is the tangential force component and P

The use of ultrasonic vibrations during the grinding process has produced notable improvements in almost every aspect of the process such as surface roughness, grinding forces, G-ratio, temperature and heat generation, and material removal rate . This method can be applied to the workpiece or grinding wheel in the form of elliptical or linear

We investigate the effect of the vibration method on the drilling process.We examine changes drilling force, surface r

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