Post by ferojarahman123 on Feb 14, 2024 6:16:01 GMT -5
Before getting into the subject, let's try to locate ourselves a little: we understand by outer space that which is outside the limit of the atmosphere, at more than 100 km in altitude. It is occupied by such a small amount of particles that it is considered practically empty, although it is not a perfect vacuum since there are very small amounts of gas, cosmic dust, atomic particles, etc. Obviously, the environmental conditions are incompatible with life: Firstly, the lack of oxygen would cause death from anoxia in a few seconds. On the other hand, the absence of atmospheric pressure would cause the blood to boil simply due to body temperature. (Let us remember, as an anecdote, that in Tibet, tea is prepared with boiling water at less than 100ºC, because the atmospheric pressure is lower there due to the higher altitude at which it is located). Finally, we must not forget the environmental temperature, which can quickly oscillate between about 200ºC below zero, if the astronaut is protected by planet Earth from solar radiation, to about 100ºC otherwise, which would cause frostbite or severe burns respectively.
For all this, it is essential to protect yourself with a space suit , inside which the conditions that make survival possible are maintained. However, these France Phone Number List suits also have their drawbacks , since they are made up of several layers of special fabrics, which make movement difficult and limited. The existence of this almost perfect vacuum means that processes that use an electric arc as a heat source, such as coated electrode, MIG-MAG or TIG, are not applicable. Since there is no gaseous atmosphere to ionize to generate the plasma, through which the electrons must jump, the arc is not maintained. If an auxiliary gas were provided to ionize, it disperses so quickly that ignition of the arc would be impossible. However, this is also an advantage, since not being in the presence of the gases that make up the air, no oxidation would appear (oxygen), no pores (nitrogen) or cracks (hydrogen) would occur.
Banner_seas_welding_728x90_campus_seas So, what welding process can be used in that “empty” outer space? Scientists from the main aerospace powers (USA and Russia) have been asking themselves that same question for several years and, even today, it seems that it does not have a definitive answer. It seems that the first welding tests carried out in space were carried out in 1969, called the “Vulkan experiment” . They took place on the Soviet Soyuz VI ship, as stated in the ABC newspaper of October 17 of that year, where it is stated verbatim that “ the cosmonauts have carried out experiments on the automatic welding of metals (…), in deep conditions.” vacuum and in extraterrestrial gravity .” It seems that the techniques tested were coated electrode welding (misnamed “shielded metal arc welding” in certain documents of the time), plasma welding and electron beam welding .
For all this, it is essential to protect yourself with a space suit , inside which the conditions that make survival possible are maintained. However, these France Phone Number List suits also have their drawbacks , since they are made up of several layers of special fabrics, which make movement difficult and limited. The existence of this almost perfect vacuum means that processes that use an electric arc as a heat source, such as coated electrode, MIG-MAG or TIG, are not applicable. Since there is no gaseous atmosphere to ionize to generate the plasma, through which the electrons must jump, the arc is not maintained. If an auxiliary gas were provided to ionize, it disperses so quickly that ignition of the arc would be impossible. However, this is also an advantage, since not being in the presence of the gases that make up the air, no oxidation would appear (oxygen), no pores (nitrogen) or cracks (hydrogen) would occur.
Banner_seas_welding_728x90_campus_seas So, what welding process can be used in that “empty” outer space? Scientists from the main aerospace powers (USA and Russia) have been asking themselves that same question for several years and, even today, it seems that it does not have a definitive answer. It seems that the first welding tests carried out in space were carried out in 1969, called the “Vulkan experiment” . They took place on the Soviet Soyuz VI ship, as stated in the ABC newspaper of October 17 of that year, where it is stated verbatim that “ the cosmonauts have carried out experiments on the automatic welding of metals (…), in deep conditions.” vacuum and in extraterrestrial gravity .” It seems that the techniques tested were coated electrode welding (misnamed “shielded metal arc welding” in certain documents of the time), plasma welding and electron beam welding .