Hello to all,
In general, theory suggest that depth of cut and surface roughness are proportional to each other during any metal cutting process.
On the contrary, I am getting reverse case while machining Al6061 with Diamond tool. I have varied the depth of cut from 1 µm, 10 µm and 20 µm. In the main effect plot, I am getting decreasing roughness with increasing depth of cut.
Can any one tell me what may the reason for getting this kind of trend?
Dear Borad
The finishing of machine is depth upon the proper rpm of machine rotating with the proper depth of cut.
So the reason behind is that ur rpm or speed is variable under the depth of cut..
I m know little bit not sure but may be helpful for u....
What about the other machining parameters ( cutting speed and feed rate)? Assuming you used the same values for those parameters, then the very very low depth of cut should give you reverse case due to the very fast and easy formation of the BUE , I think it is important to carry out a test towards this. Good Luck
Hello Hayder sir...Thank you for your response. The other parameters are cutting speed (1000-1800rpm) and feed rate (3-10 microm/rev).
Khan Sir, Yes.. I used coolant in mist form...
One of the possible reasons are the impurities and hard inclusions of the surface layers in the workpiece material. There is the possibility that at higher depths such surface layers will be cut off and thus do not come into contact with the tip of the tool, and therefore to a lesser wear and better quality of the treated surface.
Good luck with the research.
BR, Adnan M.
There are many parameters influencing on surface roughness during mechanical machining ( cutting conditions ,tool geometry, cooling system) , so depth of cut and feed rate have a great influence but as I Know with higher depth of cut can get high values of surface roughness.
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