Industrial Mechanisms - Revision history

Strangelv: Lunar Cement renamed to Lunar Cement

2019-04-10T21:41:21Z

Lunar Cement renamed to Lunar Cement

Farred: addition

2013-09-18T00:07:04Z

addition

Farred: addition

2013-09-17T23:36:47Z

addition

Farred: fix typo

2013-09-17T23:21:46Z

fix typo

Farred: Metal ... are ==> Metal ... is

2013-09-17T23:14:59Z

Metal ... are ==> Metal ... is

Farred: addition

2013-09-17T23:11:16Z

addition

Farred: addition

2013-09-17T23:03:19Z

addition

Farred: fix typo

2013-09-17T22:50:37Z

fix typo

Farred: fix typo

2013-09-17T22:45:23Z

fix typo

Farred: /* Cement */ touch up

2013-08-27T19:17:04Z

Cement: touch up

@@ Line 102: / Line 102: @@
 ===Cement===
-<small>See also [[Structural Engineering]]</small>
+<small>See also [[Lunar Cement]]</small>
 How can we build a settlement without good cement?  Both in the form of concrete and as mortar, it is the universal construction material on Earth.

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 On Earth, most of the minerals used to make cement are associated with water in some way.  Limestone is laid down by living organisms at the bottom of shallow seas. Gypsum forms when an inland sea dries up.  There is no water on the Moon and there never has been.  No minerals of this type can be expected.
-The Moon is cover with ground up rock and we will produce a number of interesting by-products when we harvest [[volatiles]] from it.  We need to find a way to convert some of that particulate mater and some of those chemicals into a solid construction material.  We need to do this with as little mass shipped from Earth as possible.
+The Moon is covered with ground up rock and we will produce a number of interesting by-products when we harvest [[volatiles]] from it.  We need to find a way to convert some of that particulate mater and some of those chemicals into a solid construction material.  We need to do this with as little mass shipped from Earth as possible.
 Steel rebar will be hard to manufacture on the Moon. On Earth it is made by recycling old cars. It should be possible to make rebar from meteoric iron on the moon but [[Glass#Fiberglass|fiberglass]] may be cheaper for many purposes.
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 ===Color in Architecture===
-The Moon is gray, asphalt parking lot gray, monotonous, boring gray.  We need to add color.  We need bright colored [[paint]].  The bulk of the paint must come from lunar materials.  [[Titanium]] is available on Luna.  [[Titanium dioxide]] is used as a white pigment.  Various elements on Luna can be mixed into glass to change its color.
+The Moon is gray, asphalt parking lot gray, monotonous, boring gray.  We need to add color.  We need bright colored [[paint]].  The bulk of the paint must come from lunar materials.  [[Titanium]] is available on Luna.  [[Titanium dioxide]] is used as a white pigment.  Various elements on Luna can be mixed into glass to change its color.  Iron(II) oxide gives glass a blue-green color.  Cobalt can give a blue color.  Cadmium sulfide produces yellow or when used along with selenium can produce red.  Tiny colored glass beads can be used to color paint.

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 We will need a way to efficiently send electrical power over at least a few kilometers.  This must be done safely and with a minimum of mass shipped from Earth.
-−
 ===Cement===
 <small>See also [[Structural Engineering]]</small>

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 ===Caterpillar Tread===
-The Caterpillar or tank tread is used extensively in construction and mining on Earth to allow heavy equipment to move across open grown.  They are massive and contain a very large number of joints and bearings.
+The Caterpillar or tank tread is used extensively in construction and mining on Earth to allow heavy equipment to move across open ground.  They are massive and contain a very large number of joints and bearings.
 Treads can be a difficult maintenance problem in dusty environments.  One of Field Marshal Romel's great innovations in the WWII North Africa campaign was to load his tanks onto trucks for long hauls.  This greatly reduced the break down rate of the treads.

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 EDM technology has been used on Earth to manufacture small metal parts that cannot be mass produced with lathes or other metal cutting technologies.
-Metal, in blocks or sheets, are placed between two electrodes and a current is passed to remove material.
+Metal, in blocks or sheets, is placed between two electrodes and a current is passed to remove material.
 EDM is expensive on Earth, it requires a complex instructions set to be programmed in a [[CNC]] language.

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 ===Lathe===
-The production of parts out of solid blocks of different types of steel would require a lathe. This lathe would work the same way as on Earth and will become the first machining tool. It is possible to build complex machines with a lathe. It is the corner stone of the manufacturing establishment it is the tool to build tools and to build the machines that build machines.
+The production of parts out of solid blocks of different types of steel would require a lathe. This lathe would work the same way as on Earth and will become the first machining tool. It is possible to build complex machines with a lathe. It is the corner stone of the manufacturing establishment it is the tool to build tools and to build the machines that build machines.  The lathe, drill press, milling machine and other machine shop tools will be used in a pressurized machine shop and so require no different design considerations than on Earth.
 ===Electrical Discharge Machining===

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 On the Moon, the primary challenge is wear from the dust.
-A conveyor belt designed for lunar vacuum use can be a train of slats supported at their ends by magnetic suspension in tracks and a belt of fiber-glass riding on the slats.  Electronic controls are needed for the magnetic suspension, a control unit at both ends of each slat.  The tracks can be roughly U shaped channels that are swept clean of dust continuously by fiber-glass brushes.  The belt and brushes would be expendable items.
+A conveyor belt designed for lunar vacuum use can be a train of slats supported at their ends by magnetic suspension in tracks and a belt of fiber-glass riding on the slats.  Electronic controls are needed for the magnetic suspension, a control unit at both ends of each slat.  The tracks can be roughly U shaped channels that are swept clean of dust continuously by fiber-glass brushes.  The belt and brushes would be expendable items. The U shaped tracks will have holes at the bottom so dust can be swept out through the bottom.
 ===Lathe===

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 ===Linear Seal===
-These seals must slide across a polished metal rod as in hydraulic pistons.  Look around an Earth construction site and you will see these pistons everywhere.  These shafts move in and out exposing their surfaces first to the internal hydraulic oil and then to the local environment.  The seals must hold in the significant pressure while withstanding the ware of sliding.
+These seals must slide across a polished metal rod as in hydraulic pistons.  Look around an Earth construction site and you will see these pistons everywhere.  These shafts move in and out exposing their surfaces first to the internal hydraulic oil and then to the local environment.  The seals must hold in the significant pressure while withstanding the wear of sliding.
 On Earth, these seals are made from rubber and plastic compounds and, again, are highly successful in a wide range of environments.  The gas shocks in modern cars are one good example.