Practica de soldeo a tope TIG

 Realizacion de la practica
detalles de la practica 

La practica consiste en ajustar la maquina de 

soldadura TIG, para realizar 

una union a tope en dos chapas 

de 100X50X3. Sin aporte de material

Una vez preparadas las piezas que 
vamos a soldar, ajustamos la maquina 
que utilizaremos, regularemos intensidad,
tipo de corriente, y tiempo de soldado  


conectamos la maquina antes de nada 
a la corriente y le metemos a la
bombona que nos protegera la soldadura  

a continuacion preparamos la 

pistola que vamos a utilizar para soldar

lo mas importate es tener la punta 

de tungsteno bien afilada para conseguir 

un paso de las cargas mas eficaz

 a continuacion procedemos a soldar 

dejando un espacio entre las dos piezas 

de la mitad de sus espesores .

Se trata de fundir ambos bordes y consequir una 

gota que se mueva por todo el borde.

 es importante la separacion que
dejemos para que se funda completamente 
el borde como en la imagen

  

dificultades:  podemos encontrar una 
complicacion a la hora de comenzar el soldeo
ya que no vemos bien la distancia de la 
punta a la pieza y puede darse el caso de que 
se nos funda la punta si lo aproximamos demasiado,
se complica la soldadura tambien 
cuando la gota llega al borde de la pieza,        

risgos:  los riegos son los mismos que en 
la soldadura anterior, quemaduras,
desprendimiento de material 
muy caliente, inalacion de humos...   

prevencion:  remarcar una vez mas la 
importancia de la careta unos buenos 
guantes y ropa de trabajo 
muy importante tener en cuenta que 
la pieza en la soldadura TIG alcanza 
una alta temperatura que tarda bastante 
en disiparse.      
     

Conformado de metal en frio

Metal Shaping

When a metal is veered round, extruded or stretched to a temperature under the recrystallization the metal is worn out in cold. They work the majority of the metals in cold to temperature set though the reaction of formed in them causes an elevation of the temperature
The work in warm realized on the metal in plastic print, it refines the structure of grain whereas the work in cold distorts the grain and reduces a bit his size. The work in cold improves the resistance, the maquinabilidad,Accuracy dimensional and finished of surface of the metal.
 
Owed to that the oxidation is menar in it works in it fried sheets mas thin and tin-plates can be laminated better than couple it works in warmly.


Effects of the work in cold

 -The principal difference of the work in warms and I cool it is the temperature to which the process is realized. In the work in cold one works the material to temperature set, but the process as such causes warming for friction between the equipment and the piece, for what it is common that the work in cold reaches temperatures up to of 200 °C.

All the metals are crystalline for the nature and are done of grains of irregular form of several sizes. When one is employed at cold the resultant changes at the form of the material it brings with you it mark in the structure of grain. The structural changes produce fragmentations of the grain, movements of atoms and distortion of the mesh.

For the work in cold there are needed very much major pressures that in the work in it warms. Since the metal remains in a condition mas rigidly is not permanently deformed until the applied stresses have exceeded the elastic limit.

The quantity of work in cold that a metal supports depends especially on his ductility, while mas ductile it is the best metal one will be able to be employed at cold; The pure metals can support a major deformation that those who have given elements, due to the fact that the metals of alloy increase the trend and rapidity of the hardening.



..................................to be continue