5 Series E60 520d (N47) SAL
VS-14/Beyser
Register/Index: 5
5 01 07 (351)
Vertrieb D
Datum/Date:
03/2007
Possible uses for resistance spot welding machines (WPS) that are currently
recommended and those that are no longer recommended
BMW/MINI
Situation:
Innovative bodywork:
The bodywork is one of the most innovative areas of the modern motor vehicle. However,
this is not always obvious to the customer. Despite this, advances technologies are
unavoidable. This is the result, on the one hand, of increasing safety requirements in the
event of a crash. On the other hand, there is the demand for reduced weight, with the
objective of reducing fuel consumption and emissions. All manufacturers who want to
adequately meet the above requirements with their new models must therefore be among
the technological leaders when it comes to the different joining methods. Not least among
these is resistance spot welding.
Welding technology in repair work:
Development of resistance spot welding technology for repair work was staggered and in
part independent of the industrial development for bodywork. The demands placed on the
welding process and the welding equipment used vary greatly between industrial use and
repair work. One decisive difference is the complex quality control process that follows the
welding process in industrial applications, which has to be free of destructive factors. This
is not possible for repair work. However, both industry and repair work share the same high
demand for process reliability and quality in spot welding. These are the standards required
for using suitable resistance spot welding machines in service!
Equipment development:
Whenever new resistance spot welding machines had to be recommended in the past (for
the reasons given above), this always went hand in hand with a new technological
generation of resistance spot welding equipment. Examples of important developments
over the last 10 years include water cooling, inverter technology, constant current control,
impedance monitoring, process regulation and the doubling of the maximum possible
welding current. Such developments were primarily reactions to constantly advancing
bodywork technology.
The permanent influence of service factors on bodywork development, with the aim of
avoiding new investments, encounters its limits from time to time. The renewal interval is
determined by advances in vehicle technology.
Possible uses and limitations of both resistance spot welding machines that are currently
recommended and those that are no longer recommended are described in
Enclosure 1
SWS Possible uses for resistance spot welding machines (WPS) that are currently reco
BMW AG - TIS
24.01.2013 09:34
Issue status (12/2007) Valid only until next DVD is issued
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