International Journal of Technology

Sharda Pratap Shrivas ¹, Kailash Kumar Kakkad ¹, Manoj Kumar Sahoo ²

Affiliations
1 Department of Mechanical Engineering, Chouksey Engineering College, Bilaspur, IN
2 Department of Mechanical Engineering, Lakhmi Chand Institute of Technology, Bilaspur, IN

Abstract

It has long been recognized that conditions during cutting, such as feed rate, cutting speed and depth of cut, should be selected to optimize the economics of machining operations as assessed by productivity, total manufacturing cost per component or some other suitable criterion. These quality features are highly correlated and are expected to be influenced directly or indirectly by the direct effect of process parameters or their interactive effects create multiobjective problems. To predict this problem we take the sixteen combinations of milling machining operation from DOE. In view of the fact, that traditional Taguchi method cannot solve a multi-objective optimization problem; to overcome this limitation grey relational theory has been coupled with Taguchi method. This problem can be solved by extended Taguchi’s method to convert multi objective problem into single objective problem. The developed models for different constraints have been used for the construction of an optimization programmed which can be used to obtain optimum cutting speeds, feed rates, axial depth of cut and radial depth of cut under different constraints.

Keywords

Milling, Quality, Surface Roughness, Material Removal Rate.

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Ritesh Kumar Dewangan ¹, Manoj Kumar Sahoo ², Manas Patnaik ¹

Affiliations
1 Department of Mechanical Engineering, Rungta College of Engineering & Technology, Raipur, IN
2 Department of Mechanical Engineering, Lakhmi Chand Institute of Technology, Bilaspur, IN

Abstract

Implementation failure in six sigma concept in supply chain management has been increasing as a concern. The reason for many Six Sigma programmes to fail is due to an implementation model which is not at all user friendly. Using a successful Six Sigma, we have to perform strategic analysis driven by the market and the customer. It is necessary to establish a high-level, cross-functional team to drive the improvement initiative and to identify overall improvement tools. We can perform high-level process mapping and prioritize improvement opportunities and develop a detailed plan for low-level improvement teams, and then to implement, document, and revise as necessary. This is important for both practitioners and academicians for achieving success at the industry level.

Keywords

Document, Implementation, MSOC, Revise, Six Sigma.

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Manoj Kumar Sahoo ¹, O. P. Sahu ¹, Manish Verma ¹

Affiliations
1 Department of Mechanical Engineering, Chouksey Engineering College, Bilaspur, IN

Abstract

This paper describes the vibration analysis of a cracked cantilever aluminium beam and analyzes the relation between the modal natural frequencies with crack depth, modal natural frequency with crack location. Also the relation among the crack depth, crack location and natural frequency has been analyzed. Double cracks at different depth and at different location are evaluated. And the analysis reveals a relationship between crack depth and modal natural frequency. As we know when a structure suffers from damage its dynamic property can change and it was observed that crack caused a stiffness reduction with an inherent reduction in modal natural frequencies. Consequently it leads to the change in the dynamic response of the beam. The analysis was performed using CATIA software. Modal natural frequency was found to be increasing with increase in crack depth.

Keywords

Free Vibration, Crack, Cantilever Beam, Modal Natural Frequencies, CATIA.

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