The welding processes

Welding Welding is a process of joining similar metals by application of heat, with or without application of pressure, with or without adding the filler material, with or without using flux. The welding processes generally used are classified into two main groups: (a) Pressure Welding (b) Fusion Welding or Welding without Pressure In pressure welding, the surfaces to be joined are heated to a plastic state. Then forced together by external pressure to make the joint. This process is used in Forge Welding, Resistance Welding and Pressure Thermit Welding. Fusion…

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Elements of Soldering

Essential elements required for soft soldering are (a) Soldering iron (b) Solder (c) Flux (d) Source of heat Soldering Irons A soldering iron consists of a copper bit, secured to a iron holder, which is fitted with a wooden handle. The soldering irons are made in various sizes. The type of soldering iron selected must be large enough to heat the job adequately. The following soldering irons are used in service: (a) Common Soldering Iron. It is used for general purpose. These are available in various sizes and shapes. The…

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Soldering, Welding and Brazing Carried Out in Workshop

In engineering, while manufacturing or assembling different parts or jobs, two or more metal pieces are joined together to form a complete job or assembly. There are several methods by which two or more metal parts can be joined. Joints can be made by riveting, welding, soldering, brazing, grooving and making some other type of seams. Soldering – Soldering is the method of joining two or more pieces of metal by means of a low melting fusible alloy (solder), which is applied in the molten state. Types of Soldering –…

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Engineering 

Role of Casting and Forging in Workshop

Casting has been used for shaping metal since the earliest days of civilization. A wide variety of sizes and shapes of simple and intricate nature can be produced in different metals. Casting is a process of producing metal or alloy components of desired shape, by pouring the molten metal/alloy into a prepared mould. After that it is allowed to cool and solidify. The solidified alloy or metal is known as casting. Smithy is understood to handle relatively small jobs that can be heated in an open fire or hearth. The…

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Science 

Law Applicable For Study of Electricity

Ohm’s Law The most important law applicable for study of electricity is Ohm’s Law. This law outlines the relationship between voltage, current and resistance in an electrical circuit. Ohm’s experiments show that whenever electric current is flowing through a conductor the following three factors are present: (a) The pressure or potential difference (V) across the conductor (measured in volts) causing the current to flow. (b) The resistance (R) of the conductor (measured in Ohm) which must be overcome. (c) The current strength (I), which is maintained in the conductor (measured…

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Basic Electrical Engineering – Introduction to Electrical

Basics of Electricity Electricity is a form of energy in which electron flows in a conductor from higher to lower potential in the same manner as water flows from higher to lower level. The flow of electricity can be detected by one or more of the following effects:- (a) Heating Effect. A flow of electricity will generate heat in the conductor through which it flows. This property is madeuse in lamps, Electric heaters etc. (b) Chemical Effect. A flow of electricity through certain solution will split the solution into its various constituents. This property…

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Arc Welding Engineering Soldering Welding 

Fundamentals of Soldering, Brazing & Soldering Techniques

Patching is a procedure of joining two metals together with iron by the utilization of a patch composite to structure a dependable electrical way. It is not a straightforward undertaking since it obliges experience and information. It is exceptionally essential to make a legitimate fastening joint since flawed joints are one of the real reason for circuit sheets disappointment. Binding is one of the most established strategies for joining two metals. There are a few methods of uniting two metals together like joining with screws and nuts, bolts, and so…

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Science 

How the Earth was Created?

The production of the Earth is nearly attached to the arrangement of the earth’s planetary group about five billion years prior. The earth’s planetary group consolidated from a tremendous billow of gas and dust, with the Sun shaping as a major aspect of the cloud crumpled in on itself affected by gravity to the point where atomic combination could start. The Sun’s gravitational field pulled in a lot of material, which shaped a circle molded structure around it, known as a gradual addition plate. The Earth, in the same way…

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