Abstract
The paper presents the results of research on the effect of the surface roughness of aluminum alloy on its coefficient of restitution. It describes the current method of finishing the workpiece surface layer after cutting and innovative measuring device which was used in the research. The material used in the research was aluminium alloy EN AW 7075. The paper also presents a relationship between the coefficient of restitution and surface roughness of the milled samples as well as impressions left by bead in function of velocity and a sample surface roughness.
Highlights
Removal machining of machine parts is widely used for changing the geometry of the workpiece and the properties of its surface layer
The purpose of this study is to evaluate the influence of surface roughness of milled aluminum alloy on the coefficient of restitution
The experiment allowed us to determine the effect of highness of surface roughness on the coefficient of restitution and the character of the impression formed
Summary
Removal machining of machine parts is widely used for changing the geometry of the workpiece and the properties of its surface layer. Final dimension of workpiece and its corrosion resistance depend on surface roughness [1]. The roughness is controlled by the selection of process parameters, such as cutting velocity, depth of cut and velocity of feed motion. On the surface of the workpiece there are characteristic marks, which represent the shape of the geometry of the cutting tool edge (Fig. 1a). They are the outlines of the arc left by the edges of the mill’s working part. Parameter Rz value is dependent on the tool edge entering angle, nose radius and feed per tooth
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