Thermal Aspects of Grinding With Electroplated CBN Wheels

An investigation is reported on the thermal aspects of grinding with single layer electroplated CBN wheels. The topography of these wheels is not periodically restored by dressing or truing, so the grinding behavior progressively changes as the wheel wears down. Straight surface grinding experiments were conducted to determine the effect of wheel wear and fluid flow on the grinding temperatures and energy partition. Low energy partition values of 3%–8% were obtained at temperatures below the fluid burnout limit. The energy partition results were analyzed in terms of a topographical analysis of the wheel surface and a thermal model which accounts for the removal of heat at the grinding zone by conduction to the abrasive grains and to the grinding fluid.

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ANALYSIS OF WHEEL WEAR USING FORCE DATA IN SURFACE GRINDING

Transactions of the Canadian Society for Mechanical Engineering ◽

10.1139/tcsme-2003-0011 ◽

2003 ◽

Vol 27 (3) ◽

pp. 193-204 ◽

Cited By ~ 2

Author(s):

Andrew Warkentin ◽

Robert Bauer

Keyword(s):

Mild Steel ◽

Surface Grinding ◽

Grinding Process ◽

Time Varying ◽

Grinding Forces ◽

Wheel Wear ◽

Excessive Heat ◽

Abrasive Grains ◽

Different Depths ◽

Force Data

Grinding involves many randomly shaped and distributed abrasive grains removing material from a workpiece. Wheel wear results when these grains dull, fracture or break away. As a result, grinding forces are time-varying. In order to automate and optimize the grinding process an understanding of how forces are generated and change during grinding is critical to avoid workpiece damage, surface finish deterioration, cracking, excessive heat generation, and excessive residue stresses. This paper builds upon the existing grinding literature by studying the relationships between wheel wear and grinding forces for different depths of cut when surface grinding mild steel with an aluminum oxide wheel.

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Application of map and motif analysis for the wear evaluation of abrasive grains on single-layer grinding wheel

Mechanik ◽

10.17814/mechanik.2018.12.199 ◽

2018 ◽

Vol 91 (12) ◽

pp. 1120-1123

Author(s):

Anna Bazan ◽

Andrzej Kawalec ◽

Ireneusz Chmielik

Keyword(s):

Quantitative Analysis ◽

Single Layer ◽

Active Surface ◽

Grinding Wheel ◽

Motif Analysis ◽

Wheel Wear ◽

Grinding Wheel Wear ◽

Abrasive Grains ◽

Wear Evaluation

The article presents the possibilities of using the MountainsMap Premium 7.4 program in the context of quantitative analysis of cBN abrasive on the single-layer grinding wheel active surface at various stages of grinding wheel wear. Two methods of grain separation available in the above software, ie. island analysis and motif analysis, were compared.

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High Speed Grinding of Silicon Nitride With Electroplated Diamond Wheels, Part 1: Wear and Wheel Life

Journal of Manufacturing Science and Engineering ◽

10.1115/1.538908 ◽

1999 ◽

Vol 122 (1) ◽

pp. 32-41 ◽

Cited By ~ 68

Author(s):

T. W. Hwang ◽

C. J. Evans ◽

E. P. Whitenton ◽

S. Malkin

Keyword(s):

Silicon Nitride ◽

High Speed ◽

Removal Rate ◽

Chip Thickness ◽

Single Layer ◽

Wheel Wear ◽

Abrasive Grains ◽

Grinding Performance ◽

Wheel Topography ◽

High Speed Grinding

An investigation is reported on high speed grinding of silicon nitride using electroplated single-layer diamond wheels. This article is concerned with wheel wear and wheel life, and a second paper (ASME J. Manuf. Sci. Eng., 122, pp. 42–50) deals with wheel topography and grinding mechanisms. It has been suggested that grinding performance may be enhanced at higher wheel speeds due to a reduction in the undeformed chip thickness. Grinding experiments were conducted at wheel speeds of 85 and 149 m/s with the same removal rate. Contrary to expectations, the faster wheel speed gave no improvements in surface finish, grinding ratio, or wheel life. Microscopic observations of the wheel surface revealed dulling of the abrasive grains by attritious wear, thereby causing a progressive increase in the forces and energy until the end of the useful life of the wheel. For all grinding conditions, a single-valued relationship was found between the wheel wear and the accumulated sliding length between the abrasive grains and the workpiece. A longer wheel life and improved grinding performance can be obtained when the operating parameters are selected so as to reduce the abrasive sliding length per unit volume of material removal. [S1087-1357(00)00301-4]

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Analysis of Energy Partition in Grinding

Journal of Engineering for Industry ◽

10.1115/1.2803278 ◽

1995 ◽

Vol 117 (1) ◽

pp. 55-61 ◽

Cited By ~ 57

Author(s):

C. Guo ◽

S. Malkin

Keyword(s):

Wheel Speed ◽

Energy Partition ◽

Composite Surface ◽

Workpiece Surface ◽

Abrasive Grains ◽

Temperature Distributions ◽

Analytical Results ◽

Creep Feed Grinding ◽

Grinding Fluid ◽

Creep Feed

An analysis is presented for the fraction of the energy transported as heat to the workpiece during grinding. The abrasive grains and grinding fluid in the wheel pores are considered as a thermal composite which moves relative to the grinding zone at the wheel speed. The energy partition fraction to the workpiece is modeled by setting the temperature of the workpiece surface equal to that of the composite surface at every point along the grinding zone, which allows variation of the energy partition along the grinding zone. Analytical results indicate that the energy partition fraction to the workpiece is approximately constant along the grinding zone for regular down grinding, but varies greatly along the grinding zone for regular up grinding and both up and down creep-feed grinding. The resulting temperature distributions have important implications for selecting up versus down grinding especially for creep-feed operations.

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THE EFFECT OF ABRASIVE GRAIN SHAPES ON QUALITY OF FERRITE MAGNETS GRINDING PROCESS

Majalah ilmiah Pengkajian Industri ◽

10.29122/mipi.v14i2.4170 ◽

2020 ◽

Vol 14 (2) ◽

pp. 117-124

Author(s):

Bayu Rahmat Saputro ◽

Amin Suhadi

Keyword(s):

Chemical Composition ◽

Single Layer ◽

Processing Parameters ◽

Grinding Process ◽

Model Design ◽

Grinding Wheels ◽

Abrasive Grains ◽

Abrasive Grain ◽

Shape And Size

AbstractÂ A research was conducted on the grinding process of ferrite magnet with Strontium ferrite type (SrO.6 (Fe2O3)) using electroplated single layer grinding wheels. Many cracks have been found on work pieces during this work, which is coming from grinding processes. Research is conducted starting from chemical composition test and the effect of the shape and size of the abrasive grain of grinding wheels to the quality of grinding process results by measuring crack ratio of the work piece.Â In this experiment, 3 (three) model design of grinding wheels with three different size and shape of abrasive grains are made. All of processing parameters are set at the same value as ordinary process.Â The experimental results shown that 3rd model have the best results from the outputs number and also the lowest reject crack ratio compared to 1st and 2nd models. This is because the 3rd model has blocky shape which its distribution structure is denser and more uniform compared to the irregular shape, so that continuous grinding on hard and brittle work pieces is more stable and suitable

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Thermal model for surface grinding application

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-019-04101-6 ◽

2019 ◽

Vol 104 (5-8) ◽

pp. 2783-2793 ◽

Cited By ~ 24

Author(s):

Lucas de Martini Fernandes ◽

José Claudio Lopes ◽

Fernando Sabino Fonteque Ribeiro ◽

Rubens Gallo ◽

Henrique Cotait Razuk ◽

...

Keyword(s):

Thermal Model ◽

Surface Grinding

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Forming Mechanism of Composite Abrasive Grains in Oxide Film on ELID Wheel and its Microstructure

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.709.77 ◽

2016 ◽

Vol 709 ◽

pp. 77-81 ◽

Cited By ~ 1

Author(s):

Ji Cai Kuai ◽

Cheng Ran Jiang ◽

Jiang Wei Wang

Keyword(s):

Oxide Film ◽

Grinding Wheel ◽

Compound Structure ◽

Wheel Surface ◽

Forming Mechanism ◽

Elid Grinding ◽

Abrasive Grains ◽

Shaped Crack

In this paper we analyze the forming mechanism of composite abrasive grains in oxide film on ELID grinding wheel surface, By using composition information and by taking advantage of microscale structure, we have investigated that abrasive grains surface is covered by a layer of oxide film and the fresh oxide film is loose and porous like turtle shaped crack when crushed and dried. The elements of oxide film consist of α-Fe2O3 with sphere grain of 5-50nm. This phenomena is demonstrated that the composite abrasive grains in oxide film is a compound structure which is centered by abrasive grains, with α-Fe2O3,Fe (OH)3 surrounded.

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