Abstract
The machinability of polymer matrix composites with fibers strongly depends on the type of fiber and dosage in question, having a high influence on the selection of tools and cutting parameters. The cutting temperature depends of rotation and feed cutting tools and is significantly influencing on the quality of the machined surfaces and tool life. This paper presents the results of a current study concerning the effect of the rotation-cutting speed on the cutting temperature, roughness and tensile strength of short carbon fiber reinforced epoxy composites, potentially used in automotive and aeronautic industries. Composite plates were manufactured by compression molding, using short carbon fibers with length from 0.5 mm and 6 mm. The increasing of the rotation-cutting speed increases significantly the temperature generated in the tool and slightly increases surface roughness. Tensile strength and Young´s modulus are little sensitive to drilling speed. However, above 3000 rpm it was observed significant loss of stiffness, associated with the developed temperature in the machining process.
Highlights
Polymer Matrix Composites are widely used in the manufacture of components for engineering applications [1,2]
The cutting temperature is a factor that has a significant influence on the quality of the machined surfaces and tool life
The surface roughness of the machined area greatly influences the mechanical performance of the dimensional precision and manufacturing costs [5]
Summary
Polymer Matrix Composites are widely used in the manufacture of components for engineering applications [1,2]. The addition of short fibers in a polymer matrix aims to obtain high performance composites, with the increase of the fiber fraction leading to an increase in modulus and strength of the processed material [3].
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