The soldering process is used to connect two (2) pieces of metal that its different types, where additional liquid metal air temperature of about 430 ° C in the pour. Additional metal commonly used is: an alloy of lead and tin, in which its melting point between (180 s / d 370) ° C.
Soldering strength is determined by the "adhesion force" of its alloys. While the alloy compositions are commonly used are: 50% lead + 50% tin that will melt at a temperature of about 220 ° C.
Usually on the tin added elements: cadmium, silver, copper or zinc in order to obtain better physical properties.
Soldering process using an additional metal (filler) of a type of "non-ferrous" in which the melting point more than 430 ° C, but still below the melting point of the parent metal to be continued, the additional metal will then fill the space between the metals will spliced.
A force that pulls liquid metal to fill all the rooms of grafting, called "capillary force. At regular soldering, a filler metal distribution is not controlled by capillary forces, but the filler metal melted and poured on the area to be spliced.
Special flux is needed to remove the metal and metal oxide filler must have fluidity, in order to wet the surface of the metal to be joined.
Not all soft metal used for connecting with solder, but the metal and solder alloys are commonly used are:
a). Copper; cirnya point 1083 ° C
b). Copper alloys (brass + bronze); with a melting point between (870 s / d in 1100) ° C
c). Silver alloy; its melting point (630 s / d 934) °C
d). Aluminum alloy; Among its melting point (570 s / d 640) ° C.
Usually the soldering process may be grouped based on the way of heating the parent metal (usually wear flame oksiasatilen), while the process of which will be used, depending on the filler material, equipment provided, cost and shape of objects to be joined
Below can be seen, drawing some forms solder connections commonly used in berbegai commercial purposes:
a). connection overlap
b). Intersection connection
Which is the most efficient?
c). oblique connection
Note:
a). There needs to be a gap between the metal I and metal II, so the filler metal can fill it by the force of attraction capillary
b). 2 (two) metals to be joined, be clean of dirt, oils or oxides.
c). 2 (two) metal to be joined stained, should have the same dimensions.
The main thing should dipehatikan the soldering process are: the surface to be stained, should be free of dirt, oil or oxides. Sometimes needed cleaning using a chemical liquid (chemically) or mechanically, as well fluxes (borax and mix it with other salts).
- Heating the soldering METAL IN PROCESS
In general, there are four (4) ways that can be done to heat the metal stem in the soldering process, namely:
a). Immersion objects to be joined into a filler metal or liquid flux. The temperature of liquid flux should be lower than the melting point of the parent metal will be interconnected.
Usually all of the parent metal at 2-flops by using the "jig".
b). Brazing with the use of the kitchen.
Benda is clamped with a jig and put in the kitchen at the metal melting temperature solder (filler).
c). With flame brazing, gas welding analogy with oksiasetilen. The heat comes from the flame oksiasetilen or oksihidrogen and liquefied filler metal wire right in the slit-cekah connection. Flux (in the form of "borax"), written by dipping the wire into the water.
d). In electrical solder, heat from prisoners, induction or arc (arc).
Note:
1. In order to easily control the temperature and the speed of it, are commonly used way of a) and b).
2. To accelerate the process of soldering, fillers can be formed in advance like the shape of the connection (for example: rings, rods, etc.)
Advantages desoldering:
a. allows connection of hard metal in welding
b. can connect different types of metal from his as long as the same dimensions
c. can connect flimsy material
d. his process is relatively quick, neat and does not require a "finishing" more.
Substances General DESOLDERING:
- pipe
- Installation on the eye carbide chisel tip
- Connection to the engine radiator
- Connection on the heat exchanger
- Power tools (electrics circuit)
- Improved outcomes for cast-cast late, etc.
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