Journal ArticleDOI
Cooling by sub-zero cold air jet in the grinding of a cylindrical component
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In this article, the cooling effect of using an air jet at sub-zero temperature of −15 °C in the plunge grinding of a cylindrical component made of high strength steel EN 26 was investigated.Abstract:
This paper investigates the cooling effect when using an air jet at sub-zero temperature of −15 °C in the plunge grinding of a cylindrical component made of high strength steel EN 26. A three-dimensional finite element heat transfer model with a moving heat source was developed to reveal the complexity of the heat transfer mechanism involved. It was found that the use of cold air does not significantly reduce the temperature rise in grinding and that the cooling effectiveness is mainly limited by the following facts: (a) the air jet is difficult to penetrate into the grinding zone, (b) the heat transfer coefficient provided by an air jet is small and (c) cooling is limited by the time which the rotating workpiece surface can be exposed to the jet impingement. The study also showed that the present modelling method can be used as a first tool to assess the feasibility of a new cooling medium for grinding operations.read more
Citations
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Journal ArticleDOI
Review on grinding-induced residual stresses in metallic materials
TL;DR: In this paper, the authors provide a state-of-the-art review on the investigations into the residual stresses in metallic structural materials generated by grinding, including steels, titanium alloys, and nickel-based superalloys.
Journal ArticleDOI
Improvement of surface grinding process performance of CK45 soft steel by minimum quantity lubrication (MQL) technique using compressed cold air jet from vortex tube
TL;DR: In this paper, a system was designed and manufactured to measure the convection heat transfer coefficient of different conditions of cold air with minimum quantity lubrication (CAMQL) and the results indicated that air pressure is a more important factor than temperature in cooling process at high thermal power.
Journal ArticleDOI
Heat transfer characteristics of swirling and non-swirling impinging turbulent jets
TL;DR: In this paper, the effect of swirl on the impingement surface heat transfer is experimentally investigated in incompressible turbulent (Re ǫ = 11,600-35,000) impinging air jets.
Journal ArticleDOI
Effect of grinding-induced cyclic heating on the hardened layer generation in the plunge grinding of a cylindrical component
TL;DR: In this paper, the effects of the grinding-induced cyclic heating on the properties of the hardened layer in a plunge cylindrical grinding process on the high strength steel EN26 were discussed.
Journal ArticleDOI
New knowledge about grinding using MQL simultaneous to cooled air and MQL combined to wheel cleaning jet technique
Fernando Sabino Fonteque Ribeiro,José Claudio Lopes,Mateus Vinicius Garcia,Douglas Lyra de Moraes,Andrigo Elisiario da Silva,Luiz Eduardo de Angelo Sanchez,Paulo Roberto de Aguiar,Eduardo Carlos Bianchi +7 more
TL;DR: In this paper, the results of cylindrical grinding of hardened steel were presented in terms of surface roughness, roundness error, microhardness, tangential force, diametrical wear of the grinding wheels, and G-ratio.
References
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Book
Fundamentals of Heat and Mass Transfer
TL;DR: This paper introduced the physical effects underlying heat and mass transfer phenomena and developed methodologies for solving a variety of real-world problems, such as energy minimization, mass transfer, and energy maximization.
Book
Grinding Technology: Theory and Applications of Machining with Abrasives
TL;DR: In this paper, the authors present a critical and unified picture of the grinding process and how its use brings part quality in harmony with customer expectations, as well as a shop-floor reference.
Book ChapterDOI
Heat and Mass Transfer between Impinging Gas Jets and Solid Surfaces
TL;DR: In this article, the authors present a comprehensive survey emphasizing the engineering applications and empirical equations, presented for the prediction of heat and mass transfer coefficients within a large and technologically important range of variables.