Gemstone Coated Equipment Tooling

 Diamond Covered Machine Tooling Essay

Precious stone Coated Machine Tooling

An Empirical Analysis Report

Timothy J. Johnson

April 12th, 2007

ME595 – Making Tribology

Oakland University


Diamond may be the hardest material known to man, in this day and age. Typically, diamonds have been completely known to demonstrate hardness principles up to 12000 HV (Vickers Hardness) or perhaps approximately 100HRC. Diamond-coated Tungsten Carbide tools have demonstrated increased machining features over lined tool terme conseille commonly used today. With the elevated use of batard, ceramics, and other ultra-hard / lightweight components in numerous industries, diamond-coated equipment tools have grown to be more common seeing that their efficiency improvements generally out think about their increased cost.

This daily news is a great empirical overview of various study papers related to diamond finish processes of machine equipment and their applicability to current and advanced machining operations. Topics to get discussed are: Diamond Coating Process Review, Applications of Gemstone Coated Tooling, Diamond Lined Tooling Engineering Capabilities, and some conclusions within the topic. Nevertheless a few distinct tool coating processes are mentioned with this paper, the main focus is about CVD (Chemical Vapor Deposition) Diamond Tooling and its improvements in the making industry. Diamonds Coating Process Overview

Seeing that natural gemstones are very expensive, the engineering industry has evolved a multiple methods of creating man-made or perhaps synthetic gemstone materials. These types of synthetic components are after that bonded to a substrate application before they are really suitable for machining. Discussed from this paper happen to be threes several bonding tactics: Bonded Precious stone Grit, PCD (Poly-crystalline Diamond) Diamond Equipment, and CVD (Chemical Vapour Deposition) Precious stone tools.

Bonded Diamond Grit Equipment

Bonded diamond grit equipment are the most usual diamond-coated equipment tools employed in the industry. Their basic construction includes crushed artificial or organic diamond particles glued to a variety of slicing, grinding and polishing equipment. They are mainly used in the mining market, but are also used for edge-finishing of carbon fiber composites and grinding hard materials like glasses and ceramics [2].

PCD (Poly-crystalline Diamond) Coated Tools

PCD tools are similar to bonded diamond resolution tools for the reason that they equally start with fine diamond particles. However , the PCD method involves developing the debris into a dense sintered materials using a binder made from co (symbol). These paved compacts happen to be then brazed into numerous shapes (for different kinds of slicing tools) and brazed onto solid carbide tool bodies. The PCD tools edge can then be surface down to a finished condition and even reground for tool sharpening reasons. PCD tools are over fifty years old and are prevalent in the aerospace market for drilling rivet slots into carbon-fiber-reinforced polymer composite materials. The automotive industry as well uses these tools for machining of aluminum composites which contain high silicon content (e. g. Ing 390). These tools can be expensive, but are often the best option to get very high accurate cuts and high impact loading [2].

CVD (Chemical Vapor Deposition) Diamond Tools

The main focus of this paper will be on CVD tools. Applying CVD technology, diamonds are actually grown (nucleated) onto the surface of a machine-tool substrate. Just for this process to reach your goals, careful attention has to be paid to the substrate materials selection. The method requires continuous exposure to great heat so tungsten-carbide or porcelain tooling substrates are desired. For the best possible coating adhesion, C-2 quality tungsten-carbide must be used [2].

Also, the parts should be carefully ready before attempting the CVD procedure. Typically, the parts are cleaned thoroughly, and then subjected to a 2-step chemical preparation process. Since shown beneath, in Figure 1, the first thing involves roughening up the surface of the tool substrate pertaining to improved...

Recommendations: [1] – SAE Brazil Publication 982876 – Diamonds Chemical Steam Deposition in Cutting Tools – Barquete, Resende, Corat, Trava as well as Airoldi, Carlos De Moura Neto 98

[2] – SAE Foreign Publication 2006-01-3153 – CVD Diamond Coated Rotating Equipment for Amalgamated Machining – Engdahl 2006

[3] – SAE Foreign Publication 2002-01-1526 – Advantage Trimming of CFRP Batard with Precious stone Coated Tools: Edge Wear and Area Characteristics – Ahmad and Sridar 2002

[4] – Lubrication Executive Publication Volume level 40, 11, 681-685 – Reduction of Thermal Failure of Sintered Diamond Exercise Elements – Bunting and Pope 1983

[5] – SAE Intercontinental Publication 2003-01-0452 – The area Analysis of Powder Metallurgy (P/M) Parts Machined by Diamond-like Co2 (DLC) Coting Cutting Tools – Alter, Smith, Littlefair, and Franks 2003