Study of Surface Roughness of Machined Polymer Composite Material

Table 4

Dependence equations on changing conditions of the cutting process (the first equation is for the HSS tool with TiN coating—with *; the second equation is for the HSS tool without coating).

	Dependence equations		Dependence equations
= 100 mm⋅min^−1	= 5.6667 + 5.5139 = 0.8824	= 2000 rpm	= 2.6875 + 11.153 = 0.5286
	= 10.508 + 0.8111 = 0.9116		= 4.9917 + 7.7222 = 0.9714
= 200 mm⋅min^−1	= 1.7375 + 16.267 = 0.3224	= 4000 rpm	= 5.6708 + 7.6889 = 0.8988
	= 8.7875 + 4.6972 = 0.7113		= −0.5458 + 18.031 = 0.2371
= 300 mm⋅min^−1	= 3.0375 + 16.383 = 0.7113	= 6000 rpm	= 0.0583 + 23.372 = 0.0145
	= −1.725 + 23.414 = 0.3052		= −7.2417 + 43.903 = 0.7465