What are Smithing and Forging ?

Smithing is the act or art of working or forging metals, as iron, into any desired shape. In this process relatively small sized jobs are heated in an open fire or hearth and subsequently hammered to get the desired shape. The shop in which the work is carried out is known as the smithy or smith's shop, and the various operations are preformed by means of hand hammers or small power hammers.

Forging refers as the process of plastically deforming metals or alloys to a specific shape by a compressive force exerted by some external agency like hammer, press, rolls, or by an upsetting machine of some kind. The portion of work in which forging is done is termed the forge and the work is mainly performed by means of the heavy hammers , forging machines, and presses. Forging processes are among the most important manufacturing techniques since forged are used in the small tools, rail-road equipment, automobile, and aviation industries.

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Advantages And Disadvantages Of Air Refrigeration System :

Advantages Of Air Refrigeration : 1. The refrigerant used namely air is cheap and easily available. 2. There is no danger of fire or toxic effects due to leakages. 3. The weight to ton of refrigeration ratio is less as compared to other systems. Disadvantages Of Air Refrigeration : 1. The quantity of Refrigerant used per ton of refrigeration is high as compared to other systems. 2. The COP of the system is very low. Therefore running cost is high. 3. The danger of frosting at the expander valves is more as the air contains moisture content.

SIMPLE CARBURETOR - CONSTRUCTION AND WORKING

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MELTING FURNACES FOR FERROUS METALS : CUPOLA AND ITS WORKING

Various types of melting furnaces are used in different foundry shops, depending upon the quantity of metal to be melted at a time, and the nature of work that is carried out in the shop. The primary objective in cupola is to produce iron of desired composition, temperature and properties at the required rate in the most economical manner. Besides, this furnace has many distinct advantages over the other types, e.g., simplicity of operation, continuity of production, and increased output coupled with a high degree of efficiency. Description Of a Cupola : The Cupola Furnace consists of a vertical, cylindrical steel sheet, 6 to 12 mm thick, and lined inside with acid refractory bricks or acid tamping clay. The refractory bricks or the tamping clay used consist of silicon oxide acid (SiO2) and alumina (Al2O3). The lining is generally thicker in the lower where the temperatures encountered are higher than in the upper region. The shell is mounted either on a brick work fo...

Mechinopedia For Mechanical Engineers

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