Abstract
In this paper, the impact of milling process parameters on the roughness of surface of glass and carbon fiber reinforced plastics was analyzed. The influence of feed per tooth, cutting speed and depth of cut on selected surface roughness parameters was determined. It was found that the surface roughness after milling carbon fiber reinforced plastics was greater compared to the surface of glass fiber reinforced plastics.
Highlights
Roughness is one of the main factors determining the geometric structure of a surface
Based on the results of the research. it can be stated that: ■ an increase in cutting speed causes a decrease in the value of roughness parameters Ra, Rz, Rku and an increase in the Rsk parameter. which indicates better surface quality after machining at a higher cutting speed;
A significant increase in the Rku parameter as the feed increases the greater likelihood of surface defects after high feed of milling; CFRP material is more susceptible to changes in surface roughness caused by an increase in feed and cutting speed compared to the GFRP composite
Summary
Roughness is one of the main factors determining the geometric structure of a surface. Of the many roughness parameters, the Ra parameter and Rz parameter (the largest height of the roughness profile) are commonly used in process monitoring [1]. The Rsk parameter associated with surface wear and friction was used [2]. Based on the value of the Rku parameter, one can conclude about the occurrence of surface defects. Polymer composites are milled as a finishing machining in order to remove the allowance generated at the manufacturing stage [9]. When choosing the milling parameters, the material structure, orientation and type of fibers as well as the expected surface roughness should be taken into account
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