Negative defocus, the availability of greater penetration, which is related
with the formation of the molten pool. The new working instruction of green
laser pointer has been issued.
The experiments show that the laser heating
50 ~ 200us material begins to melt, the formation of liquid metal and asked the
sub-vaporization, the formation of city-pressure steam, and at very high speed
jet, and a dazzling white. At the same time, high concentrations of vapor liquid
metal movement to the weld pool edge, the formation of depression in the weld
pool center. When negative defocus, the power density of material internal
surface area is also high, easy to form a stronger melting, vaporization, so
that the light pass deeper into the material. Therefore, in practical
applications, when the requirements of the penetration depth larger negative
defocus; welding thin material, it is appropriate defocus. Laser welding
processes. Welding between the plate and on-chip. Including butt welding end,
the center through the fusion welding, center perforated fusion welding and
other four kinds of process methods. The drawing of green laser pointer has the
latest revision.
Wire and wire welding. Including wire and wire welding,
welding cross, parallel lap welding, T-weld, and four kinds of process methods.
Welding wire and massive components. Laser welding can be successfully wire and
massive component connections, massive component size can be arbitrary. Welding
should be noted that the geometry of the filamentous components. Welding of
different metals. Welding different types of metal to solve weldability and
welding parameter range. Laser welding between different materials, only certain
combinations of materials possible. Laser brazing. Some components of the
connection should not use laser welding, but you can use the laser as a heat
source, the purposes of soldering and brazing, and also has the advantages of
laser welding. The truck is full of green laser pointer and leaving the
company.
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