Engineering Engineering Drawing Mechanical Engineering 

Analytical and Experimental Determination of Cutting Forces | Mechanics of Machining

Development of equations for estimation of cutting forces The two basic methods of determination of cutting forces and their characteristics are : (a) Analytical method : enables estimation of cutting forces characteristics : – • easy, quick and inexpensive • very approximate and average • effect of several factors like cutting velocity, cutting fluid action etc. are not revealed • unable to depict the dynamic characteristics of the forces. (b) Experimental methods : direct measurement characteristics : – • quite accurate and provides true picture • can reveal effect of variation…

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Engineering Engineering Drawing Lathe Machine Mechanical Engineering 

Machining Forces and Merchant’s Circle Diagram (MCD) | Mechanics of Machining

Benefit of knowing and purpose of determining cutting forces The aspects of the cutting forces concerned : • Magnitude of the cutting forces and their components • Directions and locations of action of those forces • Pattern of the forces : static and / or dynamic. Knowing or determination of the cutting forces facilitate or are required for : • Estimation of cutting power consumption, which also enables selection of the power source(s) during design of the machine tools • Structural design of the machine – fixture – tool system…

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Engineering Engineering Drawing Lathe Machine Mechanical Engineering Modern Machine Shop 

Use of Chip Breaker in Machining | Mechanics of Machining

Need and purpose of chip-breaking Continuous machining like turning of ductile metals, unlike brittle metals like grey cast iron, produce continuous chips, which leads to their handling and disposal problems. The problems become acute when ductile but strong metals like steels are machined at high cutting velocity for high MRR by flat rake face type carbide or ceramic inserts. The sharp edged hot continuous chip that comes out at very high speed • becomes dangerous to the operator and the other people working in the vicinity • may impair the…

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Engineering Engineering Drawing Mechanical Engineering 

Mechanism of Chip Formation | Mechanics of Machining

Mechanism of chip formation in machining Machining is a semi-finishing or finishing process essentially done to impart required or stipulated dimensional and form accuracy and surface finish to enable the product to • fulfill its basic functional requirements • provide better or improved performance • render long service life. Machining is a process of gradual removal of excess material from the preformed blanks in the form of chips. The form of the chips is an important index of machining because it directly or indirectly indicates : • Nature and behaviour…

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Engineering Engineering Drawing General Knowledge Lathe Machine Mechanical Engineering 

How to make a curve?

Turning requires manual dexterity, visual judgement and the co-ordination of hand and eye. In this respect it is similar to games like tennis. Such activities require the development of what psychologists term ‘motor skills’. The learning and development of these skills require relatively long periods of practice. It has been said that it can take seven years, working full-time, for a turner with aptitude to reach the peak of his abilities and become fully skilled. But again this should not deter the beginner. What does ‘fully skilled’ mean? It means…

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Engineering Engineering Drawing 

Objective, Significance & Utility of Engineering Drawing

A drawing is a graphic representation of a real thing. To draw something as a figure by means of lines expressing some ideas on the paper is known as a drawing. The purpose of the drawing is to define and specify the shape and size of a particular object by means of lines and other information about the object. A good drawing gives full information about the object in the shortest and simplest way. A drawing worked out by an engineer, having engineering ideas, for engineering purpose, is known as…

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Engineering Engineering Drawing 

Lettering Styles Used in Engineering Drawing

Writing of titles, dimensions, notes, and other important particulars on a drawing is called lettering. Lettering is an important part of a drawing. However accurate and neat a drawing may be drawn, its appearance is spoiled and sometimes, its usefulness is impaired by poor lettering.  Lettering should, therefore, be done properly in clear, legible and uniform style. It should be in plain and simple style so that it could be done free hand and speedily. Style of Lettering   – There are various forms of alphabets used in the art of lettering…

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Engineering Engineering Drawing 

Use of Geometry in Engineering Drawing

Engineering drawing is the application of the principles and methods of geometry.  Without the knowledge of geometry it is difficult to prepare a drawing. All drawings have points, lines and angles. Geometrical drawing is the foundation of all engineering drawing. Accuracy, neatness and legibility are of great importance in engineering drawing. Geometrical drawing is the art of representation of geometrical objects such as square, rectangle, cube, cylinder, cone, sphere, etc. Geometrical drawing consists of: Plane Geometrical Drawing – It is the representation of objects on a drawing sheet, having two dimensions, i.e.…

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