International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 05 | May 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 6284 OPTIMIZING THE PROCESS PARAMETER IN PRECISION TURNING ON AN HYTECH CNC LATHE BY USING TAUGCHI METHOD Shakeel 1 , Nausad Khan 2 , Rupesh Kumar 3 1 Research Scholar, Dept. of Mechanical Engineering, DITMR Faridabad, India 2 Assistant Professor, Dept. of Mechanical Engineering, DITMR Faridabad, India 3 Assistant Professor, Dept. of Mechanical Engineering, DITMR Faridabad, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helical tool path by moving more or less linearly while the work piece rotates. Although now quite rare, early lathes could even be used to produce complex geometric figures, even the platonic solids; although since the advent of CNC it has become unusual to use non-computerized tool path control for this purpose. In this study, L 9 (3 3 ) orthogonal array of Taguchi experiment is selected for three parameters (speed, feed, depth of cut) with three levels for optimizing the multi-objective in precision turning on an HYTECH CNC lathe. Through the calculation of dimensional tolerance; the multiple objectives are then obtained. The multiple objectives can additionally be integrated and introduced as the S/N (signal to noise) ratio into the Taguchi experiment. The mean effects for S/N ratios are moreover analyzed by MINITAB software to achieve the optimum turning parameters. Through the verification results, it is shown that both surface roughness and dimensional tolerance from present optimum parameters are greatly improved. To estimate the response under the optimum conditions. For the dimensional tolerance of the outer diameter, The standard deviation for dimensional variation was found out to be 1.15 microns. [Using the Parameter combination A2B3C2]. It was found out the component manufactured by the above method conformed well to the specification of the customer both with respect to the dimensional tolerance and the surface roughness. The analysis of variance (ANOVA) is the statistical treatment most commonly applied to the results of the experiment to determine the percent contribution of each factor. In this study, an L9 orthogonal array with four columns and nine rows was used. Key Words: Turning Operation, Surface Roughness, The Taguchi Approach, Taguchi Loss Function, Speed, Feed And Depth Of Cut etc. 1. INTRODUCTION Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helical toolpath by moving more or less linearly while the workpiece rotates. The tool's axes of movement may be literally a straight line, or they may be along some set of curves or angles, but they are essentially linear (in the nonmathematical sense). Usually the term "turning" is reserved for the generation of external surfaces by this cutting action, whereas this same essential cutting action when applied to internal surfaces (that is, holes, of one kind or another) is called "boring". Thus the phrase "turning and boring" categorizes the larger family of (essentially similar) processes. The cutting of faces on the work piece (that is, surfaces perpendicular to its rotating axis), whether with a turning or boring tool, is called "facing", and may be lumped into either category as a subset. Turning can be done manually, in a traditional form of lathe, which frequently requires continuous supervision by the operator, or by using an automated lathe which does not. Today the most common type of such automation is computer numerical control, better known as CNC. (CNC is also commonly used with many other types of machining besides turning.) When turning, a piece of relatively rigid material (such as wood, metal, plastic, or stone) is rotated and a cutting tool is traversed along 1, 2, or 3 axes of motion to produce precise diameters and depths. Turning can be either on the outside of the cylinder or on the inside (also known as boring) to produce tubular components to various geometries. Although now quite rare, early lathes could even be used to produce complex geometric figures, even the platonic solids; although since the advent of CNC it has become unusual to use non- computerized tool path control for this purpose. Fig -1: Adjustable parameters in turning operation