Abstract
Composites applications are widely used in many areas. Due to the enhancement of various properties. Now a days kevlar composite has widely used because of various properties like tensile , compression, shear. Drilling is the majority important machining process in making assembly of components within a negligible tolerance. Drilling in kevlar composites is difficult due its extradionary mechanical properties like high toughness and hardness. Thrust force and torque are the major influences for delamination during various machining of reinforcement polymer composites. Various paramaters are considered to reduce defects like delamination and fiber crushing. It is found from various literature reviews surface modification has enhancing the intermolecular bonding strength between fiber reinforced layers. Our paper deals with affect of process parameters on thrust force with respect to torque during drilling of Kevlar composites with and without chemically treated fibers. The composite lamina is prepared for the investigation of 60/40 kevlar-polyester resin on weight basis. The chemicals are used to treat the fibers such as Dichloromethane, methanol and distilled water with specified intervals of time. Twist and core drill bits are used to make holes. Results suggested that twist drill with chemically treated fiber having minimum thrust force. Our aim to identify the minimum delamination of composites.
Highlights
Reinforced polymer composites having mechanical properties like toughness, hardness, Tensile, Compression strength etc.Recently more number of research has been carried out to replacing metals into composites
The result are correlates with the selected parameters such as spindle speed and feed rate are considered as input during drilling operation, torque and Thrust force are obtained as output in Kevlar fiber reinforced composites
The drilling operation has been done in the chemically treated Kevlar fiber reinforced composites to determine the lower delamination under various machining conditions
Summary
Reinforced polymer composites having mechanical properties like toughness, hardness, Tensile, Compression strength etc. Shuaib et al studied the machinability condition of the Kevlar fiber reinforced composite material by using the TiN coated 135° HSS split point 6 mm diameter drill bit. In this study he investigated on different drilling parameters like drilling thrust force, cutting force, and specific cutting energy [3]. During the chemical treatment of the fibers, surface get repaired for bonding between matrix and reinforcement This project an attempt made to reduce delamination during drilling by the treatment process. The treated and untreated specimens are shown in Fig.1. and Fig.2. below
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