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: A Textbook of Machine Design: Contents 1 Introduction 2 Engineering materials and their properties 3 Manufacturing considerations in machine. Veja grátis o arquivo A Textbook of Machine Design by AND J.K. GUPTA enviado para a disciplina de Elementos de Máquinas I Categoria: . A TEXTBOOK OF. (S.I. UNITS) [A Textbook for the Students of B.E. / , U.P.S.C. (Engg. Services); Section ‘B’ of A.M.I.E. (I)]. R.S. KHURMI J.K. GUPTA.
Books for b.tech,b.arch, b.e. & other engg. Courses.the following new chapters have beed added to widen the scope and utility of this treatise: 1.
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However, space requirements, manufacturing, tolerances and shaft deflections are better met with a short bearing. It is the minimum distance between the bearing and the journal, madhine complete lubrication condition.
The density at any other temperature t may be obtained from the following relation, i. McKee in an actual test of friction is shown in Fig.
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Short and long bearing. However, the allowance must be made for manu- facturing tolerances in the journal and bushing.
Because of the side leakage of the lubricant from the bearing, the pressure in the film is atmospheric at the ends of the bearing. The diametral clearance c in a bearing should be small enough to produce the necessary velocity gradient, so that the pressure built up will support the load. Also the small clearance has the advantage of decreasing side leakage. When the length of the journal l is equal to the diameter of the journal dthen the bearing is called square bearing.
It is the temperature textook which an oil will cease to flow when cooled.
A commonly used clearance in industrial machines is 0. It has been shown j.k.guptw experiments that the coefficient of friction for a full lubricated journal bearing is a function of three variables, i.
It is mwchine temperature at which an oil gives off sufficient vapour to burn it continuously when ignited. Enviado por igualdi flag Denunciar. Attitude or eccentricity ratio.
A Textbook of Machine Design by R.S.KHURMI AND J.K.GUPTA [tortuka]_1490186411865.pdf
The term viscosity index is used to denote the degree of variation of viscosity with temperature. This will result in high friction, wear and heating.
It the difference between the diameters of the bearing and the journal. It is the difference between the radii of the bearing and the journal. The following terms used in hydrodynamic journal bearing are important from the subject point of view: Minimum oil film thickness. It is the ratio of the eccentricity to the radial clearance. The average pressure will be higher for a long bearing than for a short or square bearing.
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This is the region where the viscosity of the lubricant ceases to be a measure of friction characteristics but the oiliness of the lubricant is effective in preventing complete metal to metal contact and seizure of the parts. It is denoted by h0 and occurs at the line of centres as shown in Fig. It is the lowest temperature at which an oil gives off sufficient vapour to support a momentary flash without actually setting fire to the oil when a flame is brought within 6 mm at the surface of the oil.
The bearing should not be operated at this value of bearing modulus, because a slight decrease in speed or slight increase in pressure will break the oil film and make the journal to operate with metal to metal contact. The thin film or boundary lubrication or imperfect lubrication exists between R and S on the curve.
It is denoted by e. Pour point or freezing point. It is the ratio of the diametral clearance to the diameter of the journal. If the ratio of the length to the diameter of the journal i.
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Here is manufacturing Processes by HN Gupta PDF . Download pdf book for this subject and share to give us credit.
Manufacturing is the backbone of any industrialized nation. Manufacturing and technical staff in industry must know the various manufacturing processes, materials being processed, tools and equipments for manufacturing different components or products with optimal process plan using proper precautions and specified safety rules to avoid accidents.
the basic working knowledge of the different engineering materials, tools, equipments, manufacturing processes, basic concepts of electro-mechanical controls of machine tools, production criteria’s, characteristics and uses of various testing instruments and measuring or inspecting devices for checking components or products manufactured in various manufacturing shops in an industrial environment. It also describes and demonstrates the use of different hand tools (measuring, marking, holding and supporting tools, cutting etc.), equipments, machinery and various methods of manufacturing that facilitate shaping or forming the different existing raw materials into suitable usable forms.
Contents in Manufacturing Processes ebook : –
Unit I BASIC METALS AND ALLOYS : PROPERTIES AND APPLICATIONS
1 PROPERTIES OF MATERIALS
2 FERROUS MATERIALS
3 NON-FERROUS METALS AND ALLOYS
1 PROPERTIES OF MATERIALS
2 FERROUS MATERIALS
3 NON-FERROUS METALS AND ALLOYS
Unit II INTRODUCTION TO METAL FORMING AND CASTING PROCESS
1 BASIC METAL FORMING PROCESSES AND USES
2 FORGING
3 ROLLING
4 EXTRUSION, WIRE DRAWING, TUBE DRAWING AND MAKING
5 PRESS WORK AND DIE-PUNCH ASSEMBLY
6 CASTING PROCESS
1 BASIC METAL FORMING PROCESSES AND USES
2 FORGING
3 ROLLING
4 EXTRUSION, WIRE DRAWING, TUBE DRAWING AND MAKING
5 PRESS WORK AND DIE-PUNCH ASSEMBLY
6 CASTING PROCESS
Unit III INTRODUCTION TO MACHINING AND ITS APPLICATIONS
1 LATHE
2 SHAPERS AND PLANERS
3 DRILLING MACHINES
4 MILLING PROCESS
5 GRINDING PROCESS
6 WELDING PROCESS
1 LATHE
2 SHAPERS AND PLANERS
3 DRILLING MACHINES
4 MILLING PROCESS
5 GRINDING PROCESS
6 WELDING PROCESS
Unit IV MISCELLANEOUS TOPICS
1 IMPORTANCE OF MATERIALS AND MANUFACTURING
2 LOCATION AND LAYOUT OF PLANTS, PRODUCTION AND PRODUCTIVITY
3 NON-METALLIC MATERIALS
4 MISCELLANEOUS PROCESSES
1 IMPORTANCE OF MATERIALS AND MANUFACTURING
2 LOCATION AND LAYOUT OF PLANTS, PRODUCTION AND PRODUCTIVITY
3 NON-METALLIC MATERIALS
4 MISCELLANEOUS PROCESSES
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