In this article we will discuss about the processes used for joining metals. Learn about:- 1. Welding 2. Brazing 3. Soldering 4. Gas Cutting Process and Equipment or (Oxyacetylene Gas Cutting Process). 1. Welding: In olden days, in order to join two pieces of metals, riveting was done. But nowadays for joining two pieces of metals welding is done. So, [...]
List of Machine Tools used for Cutting Metals! 1. Centre Lathe: The lathe is the father of all machine tools. It is a universal machine tool which can be used—with certain attachment—for many processes. For its development to the form in which we now know it, we owe much to Henry Maudlsey, who developed the sliding carriage, and in 1800 [...]
Welding is broadly classified into two types: I. Plastic Welding: In this case the two pieces of metals to be joined are heated to plastic state and welding is completed by forcing them. In this case no filler material is added. II. Fusion Welding: In this case the two pieces of metal are heated and brought to molten state and [...]
Transportation planning is a complex problem. Increased facilities will change the environment and land use patterns and result in increased trips invalidating the original criteria and projections used. Increased use of operations research and systems approach to transportation planning in recent times seeks to optimise the system performance for deriving maximum benefit from the facilities. The use of mathematical models [...]
In this article we will discuss about the sheet metal manufacturing process and its operation types. Introduction to Sheet Metal Work: Most of the sheet metal work is done on presses where a die and punch or other formed tools are required. In press work large force is applied on thin sheet metals to give the required shape or to [...]
Following are the qualities or characteristics or requirements properties of a good building stone: 1. Crushing Strength: For a good structural stone, the crushing strength should be greater than 100 N/mm3. The approximate values of crushing strength of some of the stones are shown in table 2-1. 2. Appearance: The stones which are to be used for face work should [...]
The following tests are conducted for determining the qualities of a good building stone! (1) Acid test (2) Attrition test (3) Crushing test (4) Crystallisation test (5) Freezing and thawing test (6) Hardness test (7) Impact test (8) Microscopic test (9) Smith's test (10) Water absorption test. Each of these test will now be briefly described. 1. Acid Test: In [...]
In this article we will discuss about:- 1. Tools for Blasting 2. Materials for Blasting 3. Process of Blasting 4. Precautions. Tools for Blasting: Following tools are required in the process of blasting: (1) Dipper: This is shown in fig. 2-5 and it is used to drill a hole to the required depth. (2) Jumper: This is shown in fig. [...]
In this article we will discuss about:- 1. Definition of Quarrying 2. Sites for Stone Quarrying 3. Important Considerations 4. Methods. Definition of Quarrying: The process of taking out stones from natural rock beds is known as the quarrying. The term quarry is used to indicate the exposed surface of natural rocks. The stones, thus obtained, are used for various [...]
In this article we will discuss about:- 1. Manufacture of Common Tiles 2. Characteristics of a Good Tile 3. Types. Manufacture of Common Tiles: Following four distinct operations are involved in the general process of manufacturing the common tiles: (i) Preparation of clay (ii) Moulding (iii) Drying (iv) Burning. Each of the above operation will now be briefly treated. (i) [...]