scholarly journals Experimental Analysis of Abrasive Diamond Tool Wear and their Cutting Force in Stone Machining Process

2021 ◽  
Vol 9 (VII) ◽  
pp. 3261-3270
Author(s):  
N. Balasubramanyam
Keyword(s):  
Diamond Tool ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Machining Process ◽  
Work Piece ◽  
Common Procedure ◽  
Process Methodology ◽  
Force Components ◽  
Saw Blade ◽  
Sawing Process

Stone machining with a diamond tool is a common procedure for producing both standard items and design shapes, such as tiles, slabs and so on. During the entire deep sawing process of a granite work piece with finite length cutting procedure in stone processing, force components acted on the saw-blade. The work is split into two parts: theoretical and practical. The theoretical section discusses the features of diamond blades, cutting process methodology, and stone mining and processing methods. The practical portion of the project focuses on the wear of diamond blades when cutting stone, notably granite. The overall weight of the cutting blade and the loss of tooth height as a function of time are used to determine blade wear for two cutting blades from different manufacturers. There is a linear relationship between the two measured values. The findings serve as the foundation for a cost-benefit analysis of both diamond wheels.

Experimental Study and Simulation of Cutting Forces during the Deep Sawing of Granite

2009 ◽  
Vol 16-19 ◽  
pp. 1341-1345
Author(s):  
Yuan Li ◽  
Xi Peng Xu
Keyword(s):  
Experimental Study ◽  
Finite Length ◽  
Cutting Forces ◽  
Simulated Data ◽  
Measured Data ◽  
Experimental Setup ◽  
Horizontal Force ◽  
Force Components ◽  
Saw Blade ◽  
Sawing Process

An experimental setup was established to measure and study the vertical and horizontal force components acted on the saw-blade during the whole deep sawing process of a granite workpiece with finite length. The accumulated thickness of the grits engaging with the workpiece in the sawing zone was obtained by numeric method to simulate the vertical and horizontal cutting forces respectively. The results showed that the simulated data tallied well with the measured data.

Estimation of Temperature Distribution in Silicon During Micro Laser Assisted Machining

2008 ◽  
Author(s):  
Kamlesh J. Suthar ◽  
John Patten ◽  
Lei Dong ◽  
Hisham Abdel-Aal
Keyword(s):  
Temperature Distribution ◽  
Laser Beam ◽  
Intensity Distribution ◽  
Temperature Rise ◽  
Diamond Tool ◽  
Cutting Speed ◽  
Machining Process ◽  
Depth Of Cut ◽  
Work Piece ◽  
Laser Assisted Machining

Silicon is machined using a diamond tool and the process is assisted with an IR Laser for the purpose of heating and thermal softening the work piece material. The laser beam passes through the tool and into the work piece, where the material is both thermally heated (by the laser) and mechanically deformed (by the tool). The laser is used to increase the work piece temperature (up to the softening temperature of silicon, about 500–800°C [10]), while the tool deforms and cuts the heated and softened silicon in the ductile regime, without producing cracks. This hybrid laser assisted machining process results in a smooth plastically deformed surface and extends the life of the diamond tool when cutting a hard and abrasive material, e.g. silicon. Scratch tests were done using the micro laser assisted machining method with diamond tools, which demonstrated enhancement in the depth of cut from 60 nm to 120 nm with (a 2x increase in depth of cut, at a constant load) while the cutting speed varied from 0.305 mm/sec to 0.002 mm/s. An analytical and numerical method was used to estimate the temperature rise in the vicinity of the diamond tool due to laser irradiation and absorption by the silicon work piece. It is assumed that the layer of silicon that absorbs the heat from the laser radiation is silicon II. Silicon II is a metallic phase of silicon, commonly referred to as the beta-tin structure, formed by a high pressure phase transformation (HPPT). In this context, the analytical and numerical models are solved using the heat conduction equation for semi-infinite solid over time with a Gaussian laser beam intensity distribution. The temperature rise for different cases (laser intensity, depth of cut, cutting speed, etc.) was modeled using point, and plane heat source method with Gaussian intensity distribution. These results are discussed in detail to estimate the temperature distribution while machining.

Principles of Cost-Benefit Analysis for Developing Countries

1996 ◽  
Author(s):  
Caroline L. Dinwiddy ◽  
Francis J. Teal
Keyword(s):  
Developing Countries ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Benefit Analysis

Cost Benefit Analysis of Freeway Service Patrol Programs: A Case Study in Florida

2012 ◽  
Author(s):  
Pei-Sung Lin ◽  
Aldo Fabregas ◽  
Hongyun Chen
Keyword(s):  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Benefit Analysis

The Use of Cost-Benefit Analysis for Evaluating Efficiency of Public Investment Projects (The Case of Sochi-2014 Winter Olympic Games)

2011 ◽  
pp. 57-78
Author(s):  
I. Pilipenko
Keyword(s):  
Net Present Value ◽  
Olympic Games ◽  
Cost Benefit Analysis ◽  
Public Investment ◽  
Cost Benefit ◽  
Investment Efficiency ◽  
Benefit Analysis ◽  
Step Method ◽  
Investment Projects ◽  
The Usa

The paper analyzes shortcomings of economic impact studies based mainly on input- output models that are often employed in Russia as well as abroad. Using studies about sport events in the USA and Olympic Games that took place during the last 30 years we reveal advantages of the cost-benefit analysis approach in obtaining unbiased assessments of public investments efficiency; the step-by-step method of cost-benefit analysis is presented in the paper as well. We employ the project of Sochi-2014 Winter Olympic and Paralympic Games in Russia to evaluate its efficiency using cost-benefit analysis for five accounts (areas of impact), namely government, households, environment, economic development, and social development, and calculate the net present value of the project taking into account its possible alternatives. In conclusion we suggest several policy directions that would enhance public investment efficiency within the Sochi-2014 Olympics.

Hostile Takeovers and Anti-takeover Defenses in the Russian Corporate Market

2007 ◽  
pp. 70-84 ◽  
Author(s):  
E. Demidova
Keyword(s):  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Benefit Analysis ◽  
Costs And Benefits ◽  
Hostile Takeovers ◽  
Russian Market ◽  
Takeover Defenses ◽  
The Cost ◽  
European Markets

This article analyzes definitions and the role of hostile takeovers at the Russian and European markets for corporate control. It develops the methodology of assessing the efficiency of anti-takeover defenses adapted to the conditions of the Russian market. The paper uses the cost-benefit analysis, where the costs and benefits of the pre-bid and post-bid defenses are compared.

The Efficiency Evaluation of Automated Speed Enforcement System by Cost-Benefit Analysis

2009 ◽  
Vol 23 (3) ◽  
pp. 19-43
Author(s):  
강수철 ◽  
장순희 ◽  
Kim, Man Bae
Keyword(s):  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Efficiency Evaluation ◽  
Benefit Analysis ◽  
Speed Enforcement
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