Cutting parameters effects on the machining of two high density polyethylene pipes resins

Abstract

The market demand for machining and cutting of various plastics parts is in continuous increase. The aim of this study is to extract prediction laws for surface roughness, cutting forces and temperatures evolution during the machining of two polyethylene pipes grades (HDPE-100) and (HDPE-80). It was found that feed rate is the most prevailing factor on roughness criteria and that better surfaces are obtained during the machining of the harder HDPE-80 resin. Also, cutting speed improved surface quality for speeds up to 200 m.min −1 but the rising interface temperature caused surface damage and material rapid softening. Also, feed exponents, in mathematical models, were found to be 3 to 4 times higher than those of cutting speed and depth of cut. An increase in the cutting speed led to a gradual reduction for the 3 cutting forces components (Fr, Fa and Fv ) with a dominance of the tangential force (Fv ). As expected, the value of the depth of cut had a large influence on the temperature within the cutting zone. This temperature is slightly higher during the machining of HDPE-80 compared to that of HDPE-100 most probably because of hardness differences. The analysis of variance (ANOVA) was performed to check the adequacy of the mathematical models relating cutting parameters with roughness, cutting forces and global cutting zone temperature.

Modeling and optimization in turning of PA66-GF30% and PA66 using multi-criteria decision-making (PSI, MABAC, and MAIRCA) methods: a comparative study

“…An increase of (Vc) makes the material easily machinable which causes a decrease for (Fz). These results found coincide with the literature findings [53][54].…”

Experimental and modeling investigation on machined surfaces of HDPE-MWCNT polymer nanocomposite

“…As noted by previous works [10,16], the depth of cut, particularly in the range of micrometer scale, will have only minor effect on the surface roughness compared to the effects of feed rate and cutting speed. In this study, the effects of feed rate and cutting speed on the surface roughness will be investigated, while depth of cut is fixed at 0.3 mm.…”

“…Particularly, the processing condition of the present study is selected such that one can achieve surface roughness of less than 1 μm for a precision manufacturing of micrometer-sized geometries. In this regard, the feed rate is varied in the range of 0.01 to 0.07 mm/rev which is almost one order lower than conventional processing condition [16,17]. In the mean time, the tool temperature can reach up to 300 • C when machining common polymer composites with the cutting speed of around 200 m/min [18,19].…”

“…In the machining process, the cutting temperature T is significantly affected by the cutting velocity, of which relationship can be written as [16,22]…”

Comparative study of turning two engineering plastics (POM-C and PA-6) and optimisation using GA, SA, GRA and COPRAS with and without weighting (Entropie, critic, Swara, ROC)

“…This difference in the plastics nature necessitates the study of the machining of each plastic material separately. The results of the studies of Kaddeche et al [4] and Belhadi et al [5], during the turning of (HDPE), proved that (f) is the predominant factor in the evolution of tangential force (Ft) and the three surface roughness criteria (Ra), (Rz), and (Rt). However, for the evolution of the specific cutting effort (Ks), (Vc) is more dominant.…”