5,133 research outputs found

    Design development of machine shop area for the cover KS6-57.017 manufacture including the study of the cutter micro geometrical deviations in cutting process by finite elements method

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    The thesis develops the design of machine shop area for manufacturing the cover and researching the deviations of micro geometrical parameters during the cutting process by finite elements methodCONTENTS INTRODUCTION 1. GENERAL-TECHNICAL CHAPTER 1.1. Primary objectives and characteristics of object of production. Technical analysis of product specification. 1.2. Characteristics of the workpiece material. Analysis of chemical and mechanical properties. part. 1.3. Analysis of part’s technological design. 1.4. Analysis of the basic technological process of manufacturing the 1.5. Modern achievements in the field of technology, machines and equipment in the manufacture of similar products. 1.6. Conclusions and problem statement for a diploma project. 2. SCIENTIFIC RESEARCH CHAPTER 2.1. Investigation of the factors that influence the change of the geometrical parameters of the cutting tool during the machining process. 2.2. Modeling of microgeometry of cutting tool by finite element method 2.3. The results of the study of the deviations of the microgeometry of the cutter in the cutting process 3. TECHNOLOGICAL CHAPTER 3.1. Determination of the type and organizational form of production. 3.2. Choosing a method for obtaining of workpiece. 3.3. Development of the technological process of processing the part. 3.4. Determination of allowances and interoperational sizes. 3.5. Calculation of cutting modes. 3.5.1. Calculation of the cutting modes for the internal cylindrical surface ø120mm, ø130mm, ø140mm. 3.5.2. Calculation of cutting modes for drilling 8 holes ø11mm. 3.6. Choice of cutting and measuring tools. 3.7. Characteristics of equipment. 3.7.1. Turning screw lathe 16K20. 3.7.2. Lathe multistage semi-automatic model of 1716 TS. 3.7.3. Diamond cutting machine OS2425. 3.7.4. Radial-drilling machine model 2M55. 3.8. Technical normalization of the developed technological process. 3.9. Choice of equipment and determination of its quantity. 4. DESIGNING CHAPTER 4.1. Jig for boring holes ø92Н8, ø120Н8, ø140Н8. 4.2. Conductor rotary for drilling 8 holes ø11M. 4.3. Jig for controlling radial beats. 5. SPECIAL CHAPTER 5.1. Structure and composition of CAD. 5.2. The main components and types of CAD information support. 5.3. Methodology of designing technological processes for manufacturing parts using a package of applied software of the CAD-CAM. 5.3.1. Preparing the source information. 5.3.2. Block diagram of the algorithm for automated design of the technological process. 5.4. Analysis of the technological process, obtained with the help of CAD of the TP. 6. PLANNING CHAPTER 6.1. Specification of production program. 6.2. Calculation of complexity and machine-tool manufacturing of products on the basis of developed technological processes. 6.3. Determination of the annual need for technological equipment. Compilation of equipment summary. 6.4. Determining the number of staff at the site. 6.6. Determining the basic dimensions and choosing the type and construction of the building. 6.5. Determining the size of the main and auxiliary areas of the shop. 6.7. Development of layout plan. 6.8. Elaboration of the layout of the equipment. 6.9. Development of technical specification for technological preparation of production. 7ECONOMIC BACKGROUND 7.1. Organization and efficiency of equipment repair at the site 7.2. Drawing up of network scheduling of works on the site. 7.3. Determination of the economic efficiency of the decisions taken in the project. 7.4. Basic technical and economic indicators of the site. 8. HEALTH AND SAFETY MEASURES 8.1. Measures to ensure safe working conditions of the equipment. 8.2. safety Electrical installation equipment for dust, fog, sewage treatment. 9.3. Assessment of environmental performance at the site of the machine shop for the manufacture of the cover. GENERAL CONCLUSIONS APPENDICES REFERENCE

    OPTIMAL DIETARY BLENDING FOR HOUSEHOLD FOOD SECURITY IN SOUTHWESTERN NIGERIA: LESSONS FROM PUBLISHED DATA

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    The study estimates the optimal dietary intake of Lagos State residents. Analysis of the available data indicates over-consumption of all nutrients which suggests that the common nutrition related health problems in Lagos State could be attributed to excessive nutrient in-take. Consumption at the optimal level would ensure adequate nutrients at a cost within people's income limitations. The results however revealed the inadequacies of using published data for the analysis. An independent diet recall survey is therefore recommended.Food Security and Poverty,

    EXAMINING CROSS-COUNTRY AGRICULTURAL PRODUCTIVITY DIFFERENCES

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    This paper computes Malmquist agricultural productivity indexes for 125 countries over the period 1961-2001. These are decomposed into efficiency change (i.e., pure technical efficiency and scale efficiency changes) and technical change (i.e., input bias and magnitude components). Results show that developing and developed countries derive their growth from efficiency change and technical change, respectively. Input bias technical change is evident for both developing and developed countries.Productivity Analysis,
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