Why knives cannot cut a tree.

When cutting an object with a flat blade knife, the energy spreads out meaning you need a greater power. On the contrary, when using a toothed saw blade, the energy concentrates on one point, and adding high speed reciprocating action to this, cuts off the material easily.

This fact is generally known, however no one attempted to apply this for practical use. This is one of the discoveries used in our tools, and with many other innovative ideas we have developed new technologies.

Knife transforms energy into heat, while saw efficiently uses energy to cut materials. In order to achieve high-performance with least energy, it is essential to use this theory when you set the cutting depth or feed rate, which is specific grinding energy.

Many equipment manufacturers set these rates according to their experience and intuition. Experiences are useful when dealing with existing materials. However, needs for processing new materials are increasing, and estimating based on this theory is essential.

NanoTEM provides tools that are most suitable for processing wide range of materials based on this theory.

If you look at the unit of specific grinding energy, the dimension is energy/volume.
This means, specific grinding energy represents the amount of energy required to process the volume.

So what is energy in grinding? The numerator on the right side represents the energy per unit time and can be expressed (tangential grinding resistance) × (rotation speed of grinding wheel). Tangential grinding resistance is the tangential force generated when the wheel is pressed against the workpiece. (See Figure1)

(tangential grinding resistance) × (rotation speed of grinding wheel) is the multiplication of the length scratched and energy generated when a workpiece is scratched onto the surface of a grinding wheel that is not rotating for a period of time. (See Figure2)
In other words, energy in grinding process means the amount of work needed for the grinder to grind the workpiece. And the relationship between the amount of work and the volume of the processing is specific grinding energy.

Specific grinding energy of the grinding is estimated by measuring the resistance, rotation speed, and processing rate.