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  2. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    Engineering drawing abbreviations and symbols are used to communicate and detail the characteristics of an engineering drawing. This list includes abbreviations common to the vocabulary of people who work with engineering drawings in the manufacture and inspection of parts and assemblies. Technical standards exist to provide glossaries of ...

  3. Symbols and conventions used in welding documentation

    en.wikipedia.org/wiki/Symbols_and_conventions...

    The basic welding symbol which goes on the reference line to indicate the shape of the weld such as a fillet or plug. The symbol is placed on the arrow side or other side of the line to indicate which side of the joint the weld goes. The dimensions and other numbers such as the length of the weld or number of spot welds go above and below the ...

  4. Modular arithmetic - Wikipedia

    en.wikipedia.org/wiki/Modular_arithmetic

    Adding 4 hours to 9 o'clock gives 1 o'clock, since 13 is congruent to 1 modulo 12. In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" when reaching a certain value, called the modulus. The modern approach to modular arithmetic was developed by Carl Friedrich Gauss in his book Disquisitiones ...

  5. List of welding processes - Wikipedia

    en.wikipedia.org/wiki/List_of_welding_processes

    Combustion of acetylene with oxygen produces high-temperature flame, inexpensive equipment. Maintenance, repair. Oxygen/Propane welding. 312. Gas welding with oxygen/ propane flame. Oxyhydrogen welding. 313. OHW. Combustion of hydrogen with oxygen produces flame.

  6. Friction welding - Wikipedia

    en.wikipedia.org/wiki/Friction_welding

    Friction welding is a solid-state welding technique similar to forge welding. Instead of a fusion welding process, Friction welding is used with metals and thermoplastics in a wide variety of aviation and automotive applications. The ISO norm of friction welding is EN ISO 15620:2019, [2] which contains information about the basic terms ...

  7. Friction stir welding - Wikipedia

    en.wikipedia.org/wiki/Friction_stir_welding

    FSW tool by TRA-C industrie. Friction stir welding ( FSW) is a solid-state joining process that uses a non-consumable tool to join two facing workpieces without melting the workpiece material. [1] [2] Heat is generated by friction between the rotating tool and the workpiece material, which leads to a softened region near the FSW tool.

  8. Welding - Wikipedia

    en.wikipedia.org/wiki/Welding

    Welding. Overhead stick welding. Welding is a fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperature to melt the parts together and allow them to cool, causing fusion. Common alternative methods include solvent welding (of thermoplastics) using chemicals to melt materials being bonded ...

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