What are diamond tools?
Diamond segmented tools are cutting or grinding tools with diamond grains bonded to their functional parts. On this matter, diamond segments are the functional elements of a metal-bonded diamond tool. All diamonds of a metal-bonded diamond tool are contained in its diamond segments.
Diamond is the hardest material on earth (globally not only natural but also synthetic); much harder than corundum and silicon carbide. Moreover, diamond has high strength and good wear resistance. Therefore, it is an abrasive that has many obvious advantages over many other common abrasives. As a result, diamond segmented tools are known as superabrassives.
In this regard, diamond segmented tools – or superabrassives – have the following advantages:
- High grinding efficiency.
- High wear resistance.
- Long lifespan, long dressing period.
- Low comprehensive cost.
How do the diamond tools work?
The diamond segmented tools are mounted on the equipment described in section 4.4 and – together – they form the machine that enables the drilling and sawing jobs to be carried out.
Although it is generally used the expressions sawing or cutting it is important to acknowledge that technically speaking the process is actually grinding. This is why the parameters of the performance of a diamond tool differ from parameters in machining or chipping material.
Diamond segments may come in various forms on diamond tools. For a diamond blade, for example, diamond segments are just the “teeth” of the blade.
The features of the diamond segments on the diamond tool should match the nature of the material to be cut. If the material is hard, the bond of the diamond segments should be softer. Because diamonds are apt to become blunt when cutting hard material. The softer bond can be worn down with the blunt diamonds faster, and then make new diamonds beneath be more easily exposed to participate in cutting. If the material is relatively softer, the bond should be harder. For in this case diamonds can last longer. The harder bond wears slower so that it can hold the diamonds also longer. This can make better use of the diamonds and prolong the diamond tool’s service life.
The grit (size), hardness and concentration of the diamonds in the diamond segments should also be considered.
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