Difference between revisions of "AY Honors/Lapidary/Answer Key/es"

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<!-- 2. Nombrar dos clases de soluciones de cortadoras con hoja de diamante que son lubricantes y refrigerantes, y cuál es su propósito. -->
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<!-- 2. Name two types of diamond saw lubricating and cooling solutions and their purpose. -->
 
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In rock cutting, several fluids have been used as lubricating and cooling solutions, including:
 
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;Water: Water provides almost no lubrication and will cause the blade to rust. It is not recommended.
 
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;Kerosene: Kerosene is flammable and does little to inhibit rust. Further, it is smelly and somewhat toxic (care should be taken to avoid skin contact).
 
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;Diesel: Diesel has much the same properties as kerosene.
 
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;Vegetable oil: Vegetable oils are not as flammable as diesel and kerosene, but they are still flammable. They also oxidize and thicken when cold. However, they do a fair job of lubricating and cooling, are not toxic, and have low odor.
 
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;Mineral oil: These include Texaco's ''Almag'' and Chevron's ''Superla #5''. Mineral oils have low flammability, are not toxic, and have low odor. They are also more stable than vegetable oils.
 
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The purpose of lubricating and cooling solutions is twofold:
 
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* Remove the "sawdust" from the cut (this is essentially lubrication). The lubricant washes the cut material out of the slot.
 
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* Cool the blade so that is does not lose its tempering. If a blade gets too hot, it will undergo a change in its hardness and brittleness. This damages the blade.
 
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<!-- 3. Explicar cómo una cortadora con hoja de diamante corta las rocas, cómo se desafila y cómo puede afilarse. -->
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<!-- 3. Explain how a diamond saw cuts rocks, how it gets dull, and how it can be sharpened. -->
 
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A diamond saw consists of a thin body coated with a ''matrix'' around its edges. Diamond particles are embedded within this matrix. As the saw rotates, the hard diamonds come into contact with the material being cut and grind it off. The lubricant washes away the tiny chunks dislodged by the diamonds. Over time, the diamonds can break off the saw so that only the matrix is left on the cutting surface of the blade (or a significant portion thereof). When this happens, the blade can be sharpened by using it to cut through a brick. This action will wear the matrix down exposing more diamonds embedded deeper within.
 
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The rim of the blade is wider than the disc of the blade. This is by design so that the blade cuts a slot that is wider than the disc, thus preventing the sides of the disc from coming into contact with the material being cut. If it were to come into contact, the blade would bind up, and both blade and rock would heat up. When the rim gets worn down and is no longer wider than the disc, it can be restored by lightly tapping all around the rim of the blade with a ball peen hammer to flare the rim out again. Care should be taken to strike the edges straight on so that the rim remains perpendicular to the plane of the disc.
 
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A template is a flat piece of material with holes cut in it, similar to a stencil. The template is placed on a slab, and the slab is then marked along the inside edge of the selected hole in the template.
 
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A cabochon is a gemstone which has been shaped and polished as opposed to faceted. The resulting form is usually a convex top with a flat bottom. Cutting "en cabochon" is usually applied to opaque gems, while faceting is usually applied to transparent stones. Hardness is also taken into account as softer gemstones with a hardness lower than 7 on the Moh's hardness scale are easily scratched, mainly by silicon dioxide in dust and grit. This would quickly make translucent gems unattractive. Instead they are polished as cabochons, making the scratches less evident.
 
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The one notable exception to this is the case of asteriated stones such as star sapphires and chatoyant stones such as cat's eye chrysoberyl, where a domed cabochon cut is used to show the star or eye, which would not be seen in a faceted cut.
 
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Cabochons are usually cut from slabs ranging from one to three eighths of an inch thick (3 to 10 mm).
 
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<!-- 11. Cortar, dar forma, colocar correctamente y llevar un cabujón por el pulverizado, lijado, pulido y las etapas para un alto brillo o acabado vidrioso. -->
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==Referencias==
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==References==
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*http://www.inlandcraft.com/howto/cabbing/cabbing.htm
 
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*http://www.inlandlapidary.com/user_area/howtocab.asp
 
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*http://home.comcast.net/~eugenemineralclub/rocksaws.pdf
 
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[[Category:Adventist Youth Honors Answer Book|{{SUBPAGENAME}}]]
 
 
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Latest revision as of 23:15, 13 July 2022

Other languages:
English • ‎español
Tallado en piedra

Nivel de destreza

2

Año

1967

Version

23.12.2024

Autoridad de aprobación

Asociación General

Lapidary AY Honor.png
Tallado en piedra
Artes y actividades manuales
Nivel de destreza
123
Autoridad de aprobación
Asociación General
Año de introducción
1967
Vea también
Maestría de Artesanía


1

Decir cuatro precauciones de seguridad que deben tomarse al aserrar rocas.



2

Nombrar dos clases de soluciones de cortadoras con hoja de diamante que son lubricantes y refrigerantes, y cuál es su propósito.




3

Explicar cómo una cortadora con hoja de diamante corta las rocas, cómo se desafila y cómo puede afilarse.




4

Describir los cinco pasos básicos para pulir una losa o una superficie plana.



5

¿Qué importante precaución debe tomarse entre cada fase de pulido y lijado?



6

¿Qué es una plantilla y cómo se utiliza?



7

¿Qué es un cabujón y cuál es el grosor usual de la losa de la que es hecho?





8

¿Cómo se decide el mejor ángulo o posición de un modelo de losa?



9

Explicar dos métodos de lijado húmedo, mientras que se le da forma y pulido a la roca.



10

¿De qué material están hechos los compuestos del pulido? Si aparece una raya mientras se está puliendo, ¿cómo se elimina?



11

Cortar, dar forma, colocar correctamente y llevar un cabujón por el pulverizado, lijado, pulido y las etapas para un alto brillo o acabado vidrioso.



12

Montar el cabujón en alguna clase de respaldo, tales como un pin de estaca, pin para suéteres, llavero, etc., con cemento.




Referencias

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