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+44(0)1822
613555 |
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+49(0)77
24 934 125 |
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info@aci-ecotec.co.uk |
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info@aci-ecotec.de |
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| Technical notes... |
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| Geometrical fundamentals |
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| Fig 7: Solder geometrical fundamentals |
In general, reproducible situations must be
ensured. The tolerances consider all subassemblies like: Indexing,
work piece carrier, work pieces, system of coordinate and used
soldering tools. These sub-tolerances often sum up considerably.
Aci-ecotec soldering systems can process tolerances of +/- 0.3mm,
depending on the soldering point. Reproducible soldering points
are not possible with larger tolerances. The soldering pads
should have a minimum width of 0.3mm. The larger the contact
surface of the soldering tip, the better the heating of the
soldering point and consequently the soldering result.
Sharp edges or corners have an negative influence on the flowing
behavior of the solder.
The best for the soldering process is a so-called 90 degrees
corner, in which the soldering tip can be inserted and pressed
against the soldering point. In general, one can proceed that
the total tolerance must not exceed +/- 0,3. (Fig. 6 and 7)
Do not forget: The total tolerance
is not made up soley by the work piece tolerances, but also
by the tolerances of the work piece fixtures and the transport
system and applies for the three dimensions. A closer investigation
of the tolerance often shows that this requirement would result
in unacceptable single tolerances. What is to do now, what are
the possibilities to bring the positioning of the soldering
point in relation to the soldering tool within the required
tolerance field?
Soldering connection between punched parts and bent parts |
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| Automatic iron soldering |
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