Journal of the Association of Engineers, India

R. N. Banerjee ¹, K. K. Chattopadhyay ¹, D. Basu ¹

Affiliations
1 Mechanical Engineering Department, Jadavpur University, Kolkata - 700032, IN

Abstract

The quality characteristics are made up of different types of sets and can be classified as variables from the instrument measurements based on infinite natural sets, and attributes for non conforming descriptions based on the binary or natural sets. However, there is also a type of quality characteristics-linguistic-which is used in this paper for the subjective estimations of casting defects. The goal of this paper is to show how a fuzzy set theory can be applied to well-known powerful techniques of the quality control, using linguistic data for the casting defects.

Keywords

Fuzzy Set Theory, Pareto Analysis, Control Chart, Design of Experiment.

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R. N. Banerjee ¹, S. Dutta ¹, Sadhan Kr. Ghosh ¹

Affiliations
1 Mechanical Engineering Department, Jadavpur University, Calcutta-700 032, IN

Abstract

This paper presents the basic concept of reliability applicable to Mechanical Engineering. The paper also includes the results obtained and the conclusions drawn from the computer aided reliability analysis of equipment of thermal power plant done by the authors as an example of how to use the theories of reliability in actual engineering practice. However, in reality in the operation and maintenance of a plant errors arise out of a quite specific combination of conditions in the man-machine system and it is on the total system that the attention is centered.

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R. N. Banerjee ¹

Affiliations
1 Mechanical Engineering Department, Jadavpur University, Calcutta, IN

Abstract

Form milling cutters with improved design incorporating the principle of free cutting find their useful applications manufacturing spur and helical gears, rack piece production, rough cutting operation of big level gears in mass production and in repair jobs.
It is therefore, the matter of industrial importance to carry out experiments with the above mentioned cutters so as to deduce a cutting speed formula.

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R. N. Banerjee ¹, B. Guchait ²

Affiliations
1 Mechanical Engineering Department, Jadavpur University, Calcutta-700032, IN
2 Mechanical Engineering Department. Jalpaiguri Government Engineering College, Jalpaiguri-73S 102, IN

Abstract

Reliability of any engineering device or system implies the probability associated with the non-failure performance of the device or system for an accumulated time in a specific environment over a given period of operation with some desired or predicted level of confidence. The paper deals with the reliability as applied to the performance of thermal power plant. It is attempted to extend the computer aided reliability analysis to different components, namely, feed-pump, boiler, steam turbine and overall power generation in a thermal power plant. It has been observed that the reliability of the boiler is the least and the reliability of the feed-pump and that of the turbine are relatively high. In other words boiler is generally considered as the weakest link in a thermal power plant. Further, in the operation and maintenance of plant in real life there always exist some deviations or errors due to specific combinations of conditions in the man-machine system, which have been discussed in the paper.

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