What is Resistance Welding In ancient times, metal welding was done in the form of forge resistance welding (metals heated up to melting point are pressed together) and brazing (weld using alloy of low melting point). FUNDAMENTALS OF RESISTANCE WELDING Resistance welding processes are pressure welding processes in which heavy current is passed for short
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Types of Welding Fundamental principles, types of welding, Air Acetylene welding, Oxyacetylene welding, carbon arc welding, shielded metal arc welding, submerged arc welding, TIG & MIG welding. 1.Gas welding: (a) Air-acetylene welding (b) Oxy-acetylene welding (c) Oxy-hydrogen welding. 2. Arc welding: (a) Carbon arc welding (b) Plasma arc welding (c) Shield metal arc welding (d)
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Single-Mode Fiber Connectors Because of the wide use of single mode fiber connectors optic links and because of the greater alignment precision required for these systems, this section addresses single-mode connector coupling losses. Based on the gaussian-beam model of single-mode fiber fields the following equation gives the coupling loss (in decibels) between single-mode fibers that
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Basics of serial communication The serial communication port is full duplex, meaning that it can transmit and receive simultaneously. It is also a receive buffered, meaning that it can commence reception of the second byte before a previously received byte has been read from the receive register. The serial communication port receive and transmit registers
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One of the most important components in any optical fiber communication system is the optical fiber itself, since its transmission characteristics play a major role in determining the performance of the entire system. Some of the questions that arise concerning optical fiber communication are What is the structure of an optical fiber? How does light
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INTRODUCTION TO WELDING PROCESS The process of joining similar metals by the application of heat is called ‘welding’. It is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. It is often done by melting the workpieces and adding a filler material to form a pool of molten material that cools
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Introduction Mechanical Energy – Machining Process In mechanical energy methods, the material is removed by mechanical erosion of the workpiece material. Examples : Abrasive Jet Machining (AJM) Water Jet Machining (WJM) Ultrasonic Machining (USM) ABRASIVE JET MACHINING (AJM) – Mechanical Energy In abrasive jet machining process, a high speed stream of abrasive particles mixed with
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Interfacing Microcontroller 8225 The INTEL 8255 is a general purpose programmable peripheral interface. It is used to perform a variety of input/output functions in a microcomputer system. It is a 40 pin DIP IC. It requires +5V DC power supply for its operations. The 8255 Interfacing the microprocessor/ microcontroller on one side with peripherals on
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Bit addresses for I/O – Microcontroller 8051 Microcontroller 8051 contains four I/O ports. They are Port 0, Port 1, Port 2 and Port 3. All ports are 8 bit ports. So totally it contains 32 I/O pins that connects the 8051 to the outside world. Port 0 pins may be served as inputs, outputs or
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CONVENTIONAL MACHINING PROCESS In conventional machining process, metal is removed by using some sort of tool which is harder than the work piece and it is subjected to wear. In this process, tool and work piece are in direct contact with each other. In other words, the conventional machining process involve removal of metal by
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