For machining of composites like glass fibre reinforced polymers, abrasive water jet machining is generally used. In the present paper, an experimental investigation is described which is focused on studying the influence of AWJM process parameters on surface roughness of machined samples. Four process parameters namely water pressure, traverse speed, stand-off distance and abrasive mass flow rate are considered in the present study. Taguchi technique is used for the design of experiments and analysis of variance (ANOVA) is performed to determine the significance of parameters. It is found that water pressure and traverse speed are the major significant parameters for influencing surface roughness. Surface roughness decreases with increase in water pressure and decrease in traverse speed. For surface roughness minimization Grey Relational Analysis (GRA) technique is used for multi optimization of process parameters and experimental results are analyzed using Grey Relational Grades (GRG).
Incremental forming process has become more and more popular because of its ease of forming and capability to produce different part shapes using same machine setup. This paper describes an experimental study on the influence of process parameters in single point incremental forming (SPIF) on the surface roughness of formed part. Experiments are performed on cold rolled steel sheets (DC04) on a 3-axis CNC milling machine. Hemispherical headed tool of high speed steel material is used to study the effect of tool diameter, pitch, feed rate and spindle speed on the surface roughness (R a) of formed part. Design of experiment full factorial plan is used for experimentation and results are plotted using ANOVA. Based on the experimental results, the equation (model) for R a is developed using regression analysis. This model can be used to predict surface roughness of part to be formed. Considerable effect of tool diameter and pitch is found on the surface quality of formed part.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.