Modelo de causalidad-ilci

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| Técnico Laboral En Mantenimiento Electromecánico De Equipo Minero | Fecha: |
| Operación de Instrumentos de Metrología, Herramientas de Ajuste y Corte Manual |
Código Curso.MA6007 | Types of screws and bolts | Instructor:Oscar Corredor | Nota: |
Nombre:_________________________________________________________ |

OBJETIVOS |

* Fortalecer la comprensión lectora del inglés técnico* Conocer e identificar las características de los distintos tipos de tornillos y pernos.

MATERIAL DE APOYO |

* Modulo_De_Metrologia_Y_Ajuste.Doc

PROCEDIMIENTO |

1. Lea detenidamente el siguiente artículo en ingles que presenta las características de los distintos tipos de tornillos y pernos.
2. Traduzca el articulo al español
3. Presente como trabajo un resumendel artículo, donde usted da respuesta al menos a 10 preguntas que conduzcan a comprender las características de los tipos de tornillos y pernos.
4. Presente como anexo un glosario de al menos 50 términos que le haya costado comprender.
5. La forma de presentación es libre.


TYPES OF SCREWS AND BOLTS

* A hex cap screw has a protruding hexagonal head, designed to be driven by aspanner or wrench.

* A socket cap screw has a hexagonal recessed drive, usually with a cylindrical head, but can also be found with a rounded button head or a countersunk flat head. Socket cap screws can be torqued more tightly than other drives without stripping, and they are usually made from a high strength steel alloy.

* A Wood screw has a tapered shaft, allowing it to penetrateundrilled wood, or a wallplug in brickwork etc.

* Lag screw, lag bolt or coach screw refers to a large wood screw with a hexagonal head, driven by a wrench rather than a screwdriver.

* A Machine screw has a cylindrical shaft, threaded its entire length, and fits into a nut or a tapped hole; a small bolt.

* Self-tapping screws or thread cutting screws have sharp threads that cut into amaterial such as sheet metal or plastic. They are sometimes notched at the tip to aid in chip removal during thread cutting.

* A Self-drilling screw is similar to a self-tapping screw, but has a drill-shaped point to cut through the material without prior drilling.

* Thread rolling screws have a lobed (usually triangular) cross section. They form threads by pushing outward duringinstallation. They may have tapping threads or machine threads.

* A Drywall screw is a specialized self-tapping screw designed to bind drywall to wood or metal studs, but it has proven to be a versatile construction fastener.

* A Set screw, used to prevent loosening due to vibration, is available with thumb screw, square head, Hex head (inset socket) and, most commonly, headless (agrub screw in UK parlance, designed to be inserted flush with or below the surface of the work piece). Alternatively defined to be a screw whose thread reaches the head (if any), as opposed to a bolt.

* Dowel screw is a wood screw with two pointed ends and no head, used for making hidden joints between two pieces of wood.

* A stud is similar to a bolt but without the head. Studs arethreaded on both ends. In some cases the entire length of the stud is threaded, while in other cases there will be an unthreaded section in the middle. It may be anchored in concrete, for example, with only the threads on one end exposed. (See also: screw anchor, wedge anchor)

* A carriage bolt or coach bolt has a domed or countersunk head, and the shaft is topped by a short square sectionunder the head. It is used in wood where the square section is pulled into the wood as the nut is tightened, preventing the bolt from turning. The rib neck carriage bolt has several longitudinal ribs instead of the square section, to grip into a metal part being fixed.

* A stove bolt is similar to a carriage bolt, but usually used in metal. It requires a square hole in the metal being bolted...
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