Purpose
The purpose of this paper is to study the integration between fused deposition modeling (FDM) technology and abrasive flow machining process to improve the surface quality of FDM printed parts. FDM process has some limitations in terms of accuracy and surface finish. Hence, post-processing operations are essential to increase the quality of the part.
Design/methodology/approach
Initially, a sustainable polymer abrasive gel-based media (SPAGM) using natural polymer and natural additives (waste vegetable oil) was prepared using different combinations of (abrasive mesh size, percentage of abrasives and percentage of liquid synthesizer); then the characterization of media was done to check various properties. As media is an essential part in the process which helps in increase the surface finish, it needs to have some desired characteristics such as the following: the developed SPAG needs to hold the abrasives; its viscosity has to be medium so that it can easily flow through the machine; and its thermal stability caused by the increase in the temperature during various cycles of operation. For that, it is characterized rheologically as well as thermally to find its various properties.
Findings
Experiments were performed on FDM-printed parts using an L9 orthogonal array with different parameters to find their effect on the workpiece. Scanning electron microscope images of SGAPM showed sharp edges of abrasive particles and bonding pattern between polymer chain molecules. Good surface finish and material removal rate (MRR) was observed at high pressure and long finishing time with 50 per cent abrasive concentration.
Originality/value
The authors confirm that this work is original and has neither been published elsewhere nor is it currently under consideration for publication elsewhere.
This paper presents the design and development of low cost strain gauge type milling tool dynamometer, which is suitable for measuring milling forces. The designed dynamometer contains four octagonal ring members on which strain gauges were bonded. The strain induced on the strain gauges due to milling forces during cutting was measured in terms of voltages using a Wheatstone bridge. A data acquisition system was connected to the dynamometer to acquire the data. The end milling operation was carried out on AISI 1020 steel work pieces of 60 mm x 30mm x 20 mm size using different combination of cutting parameters designed by design of experiments Taguchi approach on CNC milling machine. Machining tests were performed at different cutting parameters and measured cutting forces were compared with those measures by Kistler Dynamometer. The results showed that the dynamometer could be used reliably.
Fiber-reinforced polymer (FRP) matrix materials are quickly being investigated for application in concrete construction repair, reinforcement, and refurbishment. The technology has progressed to the point that its future acceptance is mainly reliant on the availability of established design guidelines based on recognized performance criteria, as well as the cost competitiveness of these technologies in contrast to conventional rehabilitation methods. The goal of this study is to evaluate the different functional grades of adhesives throughout bond length for bonded socket joints of laminated FRP composite pipes. Damage development resistance is high with a functionally graded FRP composite socket joint, as shown. To extend the service life of the structure, the joint designer should use an FRP composite socket joint with a functionally graded adhesive (FGA).
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