Phase transformation in high-speed cylindrical grinding of SiC …
Residual stresses distribution for the grinding process (2θ=139°). From the residual stress depth profiles, it can be observed that the outer surface of the workpiece always shows compressive residual stresses. ... Under the cylindrical grinding conditions applied in this study, polytype transitions of SiC occurred. ...
Effect of Grinding Conditions of a TC4 Titanium Alloy on its
The investigation is concerned with residual surface stresses, including the construction of its empirical model, orthogonal experiments with a CBN grinding wheel …
Residual stresses computation in a grinding process
Thermal damage and residual stresses [1] are responsible for defects in grinding process, so it is important to study the factors which affect grinding temperatures. This paper presents an overview … Expand
A mathematical model for the cylindrical grinding responses of
A mathematical model of grinding force and residual stress of cylindrical grinding is proposed, and the numerical and experimental verifications of 18CrNiMo7-6 cylindrical alloy steel are carried ...
Process Parameters and Residual Stresses in Cylindrical Grinding
The paper presents an experimental study on the relationship between process parameters and residual stresses in cylindrical grinding. In particular, the influence of the depth of cut (a) and the peripheral velocity of the workpiece v w was …
Realisation of grinding-hardening in workpieces of
In plunge cylindrical grinding, the heat source sweeps over the cylindrical surface of a workpiece due to the rotation of the workpiece about its axis and the radial feed of the grinding wheel. ... field within the machined surface to avoid thermal damages of the workpiece due to thermal-induced residual tensile stresses or softening for ...
Dry Hard Turning versus Grinding—The Influence of Machining …
Dry hard turning (DHT) provides an effective process for finishing high-hardness materials. Machining-induced surface integrity has a direct impact on functional performance. This study compares the effects of the DHT and grinding processes on machining-induced surface integrity and fatigue performance of 18CrNiMo7-6 steel. The …
Geometric, kinematical and thermal analyses of non-round cylindrical
Two new models are proposed: (1) a generalized model of geometry and kinematics for cylindrical grinding of arbitrary-shaped non-round workpieces; and (2) a thermal model for non-round cylindrical grinding which considers instantaneous variations in the geometric and kinematic conditions and specific grinding energy into the …
International Journal of Advance Engineering and
When the workpiece is subjected to different manufacturing operations, intense mechanical stresses and ... Cylindrical grinding machines are also used for grinding contoured- cylinder, tapers ...
Circular grinding: use of the circular grinding technology
The HG 2 cylindrical grinder provides efficient production for the cylindrical grinding of shafts. The HG 204 is a for the cylindrical grinding of medium to large component batches. ... Components inside an aircraft engine are exposed to extreme stresses, and therefore made from very hard materials. For example a Blisk (Blade Integrated Disk ...
Modeling and simulation of high-speed cylindrical grinding based on …
The simulations of high-speed cylindrical grinding under different grinding conditions are carried out considering the thermomechanical coupling effect of grinding wheel and workpiece. ... Miao Q and Xu J 2017 Simulation research on the grinding forces and stresses distribution in single-grain surface grinding of Ti-6Al-4V alloy when ...
Grinding problem for chrome part?
From Machinery's Handbook, 25th Edn., p. 1112 (1997), wheel recommendations for cylindrical grinding of chromium plating are. Commercial finish SFA60-J8V [SFA = semi-friable alumina] High finish A150-K5E. Reflective finish C500-I9E [fine SiC] "…When you machine chrome you are actually relieveing some of the …
Analysis of Measured and Predicted Residual Stresses
To understand the origin of the sign of residual stresses, a Finite Element simulation model of finish cylindrical grinding with temperature dependent material properties was established and thermo-mechanical simulations were processed based on two-dimensional numerical simulation using SYSWELD 2010 ® software.
Influence of surface integrity on fatigue life of bearing rings
Residual stresses can improve or diminish the rolling fatigue life of bearings, according to their compressive or tensile nature. Abrāo and Aspinwall [24] compared surface integrity of turned vs ground hardened bearing steel specimens. They showed that hard turning induced deeper and more compressive residual stresses than grinding process.
Influence of cryogenic grinding surface on fatigue performance of
The geometry of the material is a cylindrical fatigue sample, following the specifications of the standard ASTM E466-96 (2002) [26]. ... Although residual stresses induced by grinding processes only affected the crack initiation stage, it is possible to establish a reasonable empirical relationship between surface residual stresses and …
Finite element modeling approaches in grinding
Structural FE grinding models simulate the mechanical deformations or stresses resulting from the grinding wheel. Kim et al. [24] developed a model that estimates the deflections caused by the wheel during the cylindrical grinding of hollow composite tubes. The model assumed a rigid wheel, which is contrary to the well-known …
Effect of process parameters on hardness and microstructure of
Some researchers have explored the 18CrNiMo7-6 steel cylindrical grinding process, tested the effect of process parameters on surface integrity, and pointed out …
Grinding temperature and its consequences on induced residual stresses
A mathematical model of grinding force and residual stress of cylindrical grinding is proposed, and the numerical and experimental verifications of 18CrNiMo7-6 cylindrical alloy steel are carried out.
(PDF) An Analysis of Surface Roughness (Ra, Rz
The negative values of residual stresses which mean the [8] M. Ganesan, S. Karthikey and N. Karthikeyan, "Prediction and state of residual stresses exist are compressive and positive optimization of cylindrical grinding parameters for surface roughness values are tensile stress which are detrimental and tensile using Taguchi method," IOSR ...
Review on grinding-induced residual stresses in metallic materials
Some major influential factors on the residual stresses formation in grinding, such as grinding wheel characteristics, dressing techniques, grinding parameters, cooling conditions, and properties of workpiece materials, are analyzed in detail. ... The cooling effects of compressed cold air in cylindrical grinding with alumina and CBN wheels. J ...
Things to Know About Cam Grinding | Gardner Web
Camlobe grinding is a complex variant of cylindrical grinding. When raw camshafts are manufactured—by casting in sand or shell molds (cast iron), forged or machined from barstock …
Potentials of grinding process simulations for the analysis of
Grinding processes are very complex due to the multitude of influencing parameters, resulting from the stochastic tool topography with numerous geometrically undefined abrasive cutting edges. Thus, the efficient design and optimization of these processes is a challenging task. Process simulations can be used as a flexible tool for …
3D modeling and simulation of thermal effects during profile grinding
A new heat transfer model for profile grinding was developed to analyze distortions caused by residual tensile stresses in linear guide rails. The simulative analysis of the thermal effects caused by a non-uniform heat source on the surface using the finite element method depends on an accurate representation of the locally variable contact …
Experimental evaluation and surface integrity analysis of
in the cylindrical plunge grinding Faruk Abedrabbo1,2*, Denis Soriano1, ... and residual stresses. In general, surface roughness was similar for the tested cooling systems, even after grinding ...
Analysis of Grinding Surface Creation by Single-Grit Approach
This paper presents some new research findings in the investigation of single-grit grinding in terms of surface creation. The investigation demonstrated that rubbing–plowing–cutting hypothesis of grinding material removal mechanism is valid in both experiments and simulations. A finite element model (FEM) was developed to simulate …
Finite element modelling of temperature in cylindrical grinding for
In grinding, the temperature management is crucial to en- sure part quality [9]. High temperature in the workpiece dur- ing grinding induces tensile residual stresses, which affects the fatigue-life of the workpiece [10]. Residual stresses are typically controlled offline using non-destructive methods like Barkhausen noise [5].
Residual stress in grinding
The residual stress owing to grinding is related to three primary aspects: plastic deformation, thermal cycling, and white layer [42,43]. During rail grinding, the abrasive grains extrude the rail surface and start to plough or cut the material as shown in Fig. 14a. Under the large tensile load, the rail material is deformed and pushed to the ...
Thermal Analysis of Grinding
Burning Limits for Surface and Cylindrical Grinding of Steels. Annals of the CIRP (1978) N.R. Des Ruisseaux et al. ... The results show that the subsurface maximum principal residual stresses decreased by 108%, the average surface roughness decreased by 33%, and the microhardness at 5 μm increased by 1% using targeted air as the …
Cylindrical plunge grinding of twist free surfaces by structured wheels
The experimental results of the cylindrical plunge grinding proved that in both dry and wet grinding, producing the spiral structures on the wheel surface reduces the grinding forces, workpiece temperature, tensile residual stresses in the workpiece, and the thermal damages to the workpiece. Although the spiral form structuring the grinding ...
2.2: Pressure Vessels
If a cylindrical vessel has closed ends, both axial and hoop stresses appear together, as given by Eqns. 2.2.2 and 2.2.3. Now the deformations are somewhat subtle, since a positive (tensile) strain in one direction will also contribute a negative (compressive) strain in the other direction, just as stretching a rubber band to make it longer in ...