CHENGDU HUAYUAN ELECTRIC EQUIPMENT CO.,LTD
LGK-100.160.200
17
suitable, some prink maybe left on the cutting surface.
Slag is coagulated on the lower side of the cutting slide when cutting the metal
or oxide. This is because the melted metal is heavier than its oxide and blow.
When cutting the alloy steel, the melted metal is uneasy to blow away because
of its bad fluidity, in addition, the alloy steel have bad thermal conductivity, the
cutting surface bottom is easy over-heated, the left melted metal melting with the
cutting bottom shaped the strong prink.
On the contract, the cutting bottom is not easy to shape melted metal when
cutting copper, aluminium and its alloy. The prink is easy to mop.
the factors affecting the forming of prink
The fluidity of the melted metal is not good, when the power is too small or the
plasma arc compact not good, the temperature of melted metal during the cutting
process is low, lucidity is not good, at this time, even the air current blows strong,
it is not easy to blow away the metal, so the prink formed.
When cutting the thick material , the large cutting seam formed the drag. During the
cutting process, different parts of the metal felt different heat, the heat on the upside
is larger than the downside, so the distance on the upside is longer than the
downside, this is called the cutting drag, which is related with the shape of plasma
and cutting speed. When the flame is short while the cutting speed is quick, the
distance difference increase, so the vertical and horizontal blow power of the arc
formed, the vertical one help to blow away the melted metal, while the horizontal
one make the melted metal flow away, the over-heated metal will melt parts of the
material bottom, then formed prink when they are cooling.
The over-heated of the bottom. When the cutting speed is too slow, the downside of
the cutting surface is over-heated, even melted, the connect of the liquid metal and
the bottom increase, so the melted metal is uneasy to be blow away.
The air current blow force is not enough. When cutting with plasma, the arc blow
force including the air current blow and the arc electromagnetic force, of this, the air
current blow act the main function, if the air current blow force is not strong enough,
it cannot ensure all the prink will be flow away, then the prink formed.
the measurement to diminish the prink,
Ensure the center between electrode and nozzle precise joint so that the compact
of the plasma arc will not be damaged and the flame not concentrate to weaken the
cutting capacity.
Enough power source to ensure the fluidity of the melted metal, as well as increase
the stability of the cutting speed and process. This made it possible to adopt large
air current to enlarge the air blow force, then diminish the prink.
Adjust suitable air current and cutting speed. If the air current is too low, the blow
force is not enough, while if too high, the plasma arc will be shorten, the cutting
surface will be “V” shape, the drag enlarge. The two condition will form prink.
When cutting speed is slow, the cutting surface is large and rough, the bottom is
easy to be over-heated, while the cutting speed is fast, the drag is enlarge, this is
not good for the prink diminish.
So under certain circumstance, the air current and cutting speed has a match range.
diminish the cutting surface slanting and rounding problem
