Nanomaterials used as coolant to increase thermal conductivity but increasing the weight ratio of nanoparticles in the coolant as shown abrasive property. Hence, nanocolant with high weight ratio will be used to quench the hot cutting tool after retracted from contact with the workpiece and small amount of nanocolant with optimum weight ratio sprayed onto the workpiece using MQL method.
There are two ways:
1) Thermography: the values are relatives because is very difficult to calibrate the measure values. The emissivity is influenced by ambiental conditions and surface state of the tool. The chip and lubricant complicate the measure.
2) Thermocuples: you need to make by wedm a hole from the base of toolholder, until near the surface of the tool (0,2mm to 0,3mm). The precision of the measure is affected by distance between thermocuple and surface of tool. The measure is punctual and lower than real value.
To know the position where is the maximun temperature you can make a simulation by FEM.
Daniel's comment about the position of maximum temperature is right. I tried the FEM method for SiC and coated carbide tools where the relation of tool temperature and stress with tool wear are shown in simulation (attached file).
Furthermore, to reduce tool-chip contact time, we proposed a combination method consists of MQL and ultrasonic assisted machining which caused to reduce built of edge (attached file).
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