Page 104 - BlueFastening-Systems_Brochure_07192017
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Flowform® – the innovative sheet metal

The screw-in process and process parameters.

The screw-in process is divided into five separate                 Temperatue curve
steps. Different parameters need to be selected                    The graph shows a typical
for each of these steps. These parameters depend                   temperature curve during the
on the joining combinations. Material thick-                       joining process.
ness and strength, heat conductivity and the
component rigidity all play a significant role in            250   Joining process               Cooling phase
selecting the parameters.                                  T [°C]

The process parameters for each step consist of control,   150
target and monitoring variables. See page 12 for further
information

                                                           100

                                                           50

                                                                   1 2 3 4 5 6 7 t [sec] 9

0 Positioning                           1 Hole forming

      8000                                    8000                 Aluminium  3000
n [U/min]                               n [U/min]                             F [N]
                                                                              2000   Steel
      6000                                    6000                            1500
      5000                                    5000  Steel                     1000                     Aluminium
      4000                                    4000                                               3 4 s [mm]
      3000                                    3000                             500
      2000                                    2000
      1000                                    1000

            Steel  Aluminium

                                                                                     12

        Feed fastener                      Initiate rotation speed
        Find drive engagement              Initiate axial joining force
        Use hold-down plate to clamp       Locally plastify the joining area
        metal plates together              Tip penetrates
        Position the fastener
                                        Rotation speed and axial joining force depend on material and thickness

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