Studying the Effect of the Percentage of Cutting Fluid and Cutting Speed on Surface Roughness


The purposes of cutting fluids (MWF) which are used in the mechanicalmachining operation are important to make cutting easy, and increase the rate ofproductivity. It is now very important subject because the direct effect to producebest surface roughness and negative effect on work environment and worker. Thispaper studies the effect of using cutting fluids on the surface roughness of theproduct. The Iraqi soluble cutting type was used, in the experimental work, specialstudy to do a number of experiments to choose the best metal cutting parametersuch as (cutting speed, condition depth of cut paper, and feed rate) ,also its effectson the surface roughness. In this paper was used (low alloy steel) and cutting toolof (Tungsten Carbide) were used which have a high hardness. Different cuttingspeeds were used with constant cutting depth and feed rates. was used threedifferent mixtures in different percentages of the fluid with water and by twomethods of using cutting fluid, the first method is flooding method and the secondis misting method with average of (480 mL/hrs) for three mixtures from the fluid.From the results appear the best operation case to gain best surface roughness forproduct is by use flooding method with ratio (1:20) (oil: water) with linear cuttingspeed (94.2m/min). Which gives surface roughness of (0.01 m m). Will havenoted the direct effect of the cutting fluid and the water drop on the fluid on thesurface roughness.