A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Patil, P. J.
- Improvement of Overall Equipment Effectiveness (OEE) using TPM in Industries
Authors
1 Tatyasaheb Kore Institute of Engineering and Technology, Warananagar, Kolhapur, Maharashtra, IN
Source
Manufacturing Technology Today, Vol 20, No 5-6 (2021), Pagination: 3-14Abstract
Total Productive Maintenance has been proven to be a very effective tool for the improvement of productivity and efficiency of employees and equipments. From the TPM perspective reliability and availability are the ultimate goals. The way to accomplish the goals is through elimination of major losses. These losses are only due to mechanical nature and visualized by key figure OEE. In this paper, the study of OEE improvement in Printing Industries Ltd is discussed. During this study, The 11 CNC machines were considered for the first phase of TPM implementation. The study of the old setup of machine shop of the company was done to find out different drawbacks and barriers. It was observed that machine shop has less OEE, lack of self improvement of operator, strong resistance to change by operators, improper use of resources, and poor arrangement system of tools. It was decided to use TPM tools to eliminate the above problems and to improve the OEE. The TPM plan was executed by using different methodologies. Machine performance data were collected for 11 machines under consideration after TPM implementation. These data were used for comparison of utilization time, idle time, efficiency and OEE of the 11 machines before and after TPM activity.
During implementation of TPM various tools were used such as 5S, Autonomous maintenance, Preventive maintenance and Focus improvement (SMED). All methodologies contributed to increase utilization time and OEE of machines in different manners. The result of this work is increase in utilization time and decrease in idle time by 5% and 3% respectively as compare to old machine setup. Thus average OEE of 11 machines reaches to 72.56% which shows 3.26% increase than the previous year.
Keywords
Total Productive Maintenance (TPM), 5S, Autonomous Maintenance, Preventive Maintenance, Focus Improvement.References
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- Real Time Centrifugal Stress Analysis of Flywheel Using 3D Photo Elasticity and FEA
Authors
1 Tatyasaheb Kore Institute of Engineering & Technology, Warananagar, Kolhapur, Maharashtra, IN
Source
Manufacturing Technology Today, Vol 20, No 7-8 (2021), Pagination: 9-15Abstract
The aim of this paper is to analyze the real time centrifugal stresses induced in the flywheel when it is subjected to high rotational speed. When flywheel is subjected to higher rotational speeds, centrifugal forces act on it. As a result of this centrifugal force, stresses are developed at the rim of flywheel. These centrifugal stresses developed may be responsible for the failure of the flywheel when the working stress value exceed the design stress value. In order to have a safe and reliable design of the flywheel, it is necessary to investigate the stresses developed in the flywheel when subjected to high rotational speeds. To evaluate these stresses, 3D photoelasticity method has been used as experimental method. This stress value was then scaled to the actual prototype i.e., flywheel. FEA analysis was done using ANSYS 19.0 workbench software. The result shows that the centrifugal stresses occur at the rim of the flywheel. The 3D photoelasticity technique gives clear knowledge of the stress patterns at the rim of the flywheel. Results obtained from various methods have been compared. There is a close agreement between FEA and experimental results. This study concludes that the true value of centrifugal stress is less than the theoretical one. The outcome of this work will help the designer to design a safe and reliable flywheel by using optimum parameters and prevent overdesign of flywheel.Keywords
3D Photoelasticity, Centrifugal Stress, Polariscope, Material Fringe Value, Scaling Model to Prototype.References
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