Development of a diagnostic schedule for a defective LC-195V5 CNC Milling machine using PERT

Computer Numerical Control CNC machine tools usage are more and more extensive, its fault diagnosis research is becoming more essential. Failure forms accorded these machines are diversified, and fault reasons are very complicated. It should not be left unattended to, because this could lead to further deterioration. One of the parameters used in determining the efficiency of a technician (who repairs machine tools) is the time saved in locating faults, hence the development of a diagnostic schedule which shows the sequential means of troubleshooting within a possible shortest time. In this research two approaches were used to diagnose a defective LC-195V5 CNC milling machine. Forward Pass (FP), which involves the diagnosis from electrical parts through Computer (CNC) to mechanical component and Backward Pass (BP) which involves the diagnosis from computer component through electrical parts to mechanical parts. Three different trials were conducted for each of the mode of diagnosis and the time to diagnose each component part was recorded. Based on the interrelationship of the component parts, two separate PERT (Project Evaluation & Review Techniques) network diagrams were drawn and their Critical Paths were determined. The study reveals that Foward Pass method was able to save more time

Analysis of combustible municipal solid waste fractions as fuel for energy production exploring its physico-chemical and thermal characteristics

An investigation study on municipal solid waste generation and physicochemical characteristics of combustible fractions was carried out in Ilorin metropolis. This was driven by a need to meet energy demand and reduce the consequential effects of wastes for clean and green habits. Ilorin waste sector, requires detailed information on the physicochemical characteristics of the wastes fractions, to choose the appropriate method for waste management in the city. A240 litres bin volume of wastes was sampled 62 times within eight months at Lasoju dump-site. The conformity of the combustible wastes with the characteristics required of solid fuel was investigated. Manual sorting enables access to vital information about recovery and characteristics of waste components. Nine out of nineteen components characterized, were selected for Laboratory analyses. The results of the physical characterization, shows that 70% MSW generated is combustible. The proximate analysis reveals that the wastes contain more than 64% fixed carbon, 33 % volatile matter and 5 % of moisture content, while the ultimate analysis shows more than 29 % of carbon which can contribute to the calorific value of the MSW. Nitrogen is about 2.8 % and Sulphur about 0.2 %; the small average amount of Nitrogen and sulphur present, will cause reduction of emissions during combustion. The energy content of the MSW determined, using bomb calorimeter was about 20 MJ/kg. The results show that the MSW stream in Ilorin metropolis would serve as a reliable and sustainable renewable energy resource via combustion method

DEVELOPMENT OF PEDAL OPERATED HONEY EXTRACTOR

Bees are winged insects that produce honey by their activities with the nectar of flowers. The honey produced is sweet and are finding replacement for sugar nowadays. Honey bees live in hives where the honey combs being formed by the bees are being deposited. Various methods had been exploited in extracting this honey from the honey comb both traditionally and by different designs of extractors from the primitive to a modern one. Although the former design which was locally produced in Nigeria was hand driven which functions quite efficiently, however, there is need for new innovation that involved the introduction of pedaled mechanism. An existing honey extractor design was improved upon with the introduction of pedal mechanism as compared to the hand driven one with the aim of extracting the honey in the most hygienic way with the suitable materials required. The efficiency of the machine was estimated to be 85 per cent, which was compared to the former available designed one of 83 per cent efficiency. The cost analysis for the production of the machine was included in the work which was estimated to be #48750 (US$243.75)

An Algorithm of a Convectional Factory Electric Tray Dryer

An algorithm of a convectional factory tray dryer with performance evaluation on the functionality of the dryer was reported. This is required to reduce drying time of material as well as man-machine interface which can cause slow operation and contamination of the material been dried. The algorithm of the model was developed with an interface accorded with computer software (MATLAB) for its quick implementation. This algorithm was able to predict parameter values needed for dryer automation such as heating element diameter, heating chamber length, pumping power and flow rate of air. Result generated from the algorithm, was found to be of importance in fabrication of a convectional factory electric tray dryer. The algorithm was also validated by manually calculated parameter values. The results were found to be the same, this proved the effectiveness of the algorithm

Design Concepts Towards Electric Powered Gari Frying Machine

The most critical unit of operation while processing cassava into gari is the gari frying which occurs as a result of the simultaneous cooking and dehydrating the moisture content present by the application of heat. Traditional method had been established of frying gari, this has been exposing the fryer to various health disorders. This paper highlights the design concept of the electric gari frying machine which will help to alleviate these health disorders, by making gari frying appealing to the farmers. Gari frying should be done on hygienic principles with modern available technology therefore the frying process was analyzed; required components were identified and designed to specification. The required engineering drawings that will aid its production were produced as well as the projected production cost of the machine specification. The machine mode of operation was discussed and it can be concluded that the machine will be highly efficient and will ease the work of the farmers

DESIGN AND DEVELOPMENT OF AN UNMANNED SURVEILLANCE AERIAL VEHICLE (USAV) USING LOCALLY SOURCED MATERIAL

An Unmanned Surveillance Aerial Vehicle (USAV) is an air vehicle which is largely used for surveillance, monitoring, reconnaissance, data relay, and data collection or to enter an area which is not safe for human. This study documents the development and evaluation of a low cost, short range unmanned aerial vehicle to monitor a fixed operational urban area. Aerodynamic principles were employed to develop a better concept through reasonable design considerations and assumptions. The design was then modeled using National Aeronautics and Space Administration (NASA) Vehicle Sketch Pad (VSP). Analysis of aerodynamic properties of the wing airfoil section, lift and drag analysis of resisting surfaces, stability in flight were carried out with the aid of Computational Fluid dynamics software (JAVA FOIL). Ultimately, in achieving the goal of this study, the design concept was supported by the fabrication of a flying prototype and an economic analysis of the total cost of fabrication. Keywords: Aerial Vehicle, Surveillance, Aerodynamic, JAVA Foil, Airfoi

Legislative Documents

Also, variously referred to as: House bills; House documents; House legislative documents; legislative documents; General Court documents

Parameters Determination for the Design of Bevel Gears Using Computer Aided Design (Bevel CAD)

This paper prescribes a Computer Aided approach to the design of bevel gears. The approach utilizes standard design equations and standard data on bevel gears; linking them together using a Programming language(C#) to develop this special software (Bevel CAD) that designs and determines the strengths and dimensions of bevel gears. This study reviews the Procedural steps (algorithms) involved in the design of bevel gears and the development of the software package (Bevel CAD) which is to be used in designing bevel gears. When material required are selected based on the area of application, the software will make use of the data provided using the C# to determine the required; speed and velocity of the bevel gear, number of teeth, speed ratio, dynamic load, endurance strength and maximum wear load for the design bevel gear. The Bevel CAD’s performance was verified by comparing the results of Algorithm calculation and the software’s results. The Bevel CAD was confirmed effective as the minor differences obtained between the results were due to approximation errors. The Bevel CAD increases productivity but reduces drudgery of enormous calculations; hence, making it a recommended tool for industries and tertiary institutions for the designing of bevel gears