Page 110 - BlueFastening-Systems_Brochure_07192017

Flowform® – the innovative sheet metal

Joining point analysis

Several validation steps are required to ensure a reliable series
process. This includes a laboratory joinability investigation as well
as further screw validations using original components. Then the
applications characteristics achieved using Flowform® need to be
checked for functionality by the user. The investigations illustrated
here merely show the preliminary trials under laboratory conditions.

1 Customer inquiry 2 Investigating availability

Customer using checklist Axial Joining Contol variables The control variables are
to collect information Force determined on an experimental
Rotation speed basis for the specified joining
General Information Rotation Speed Axial joining force point.
Description of project Force of hold-down plate
Contact details Joining
Scheduling Target variables With the target variables
Contact Path determined it is possible to
Torque find the switch points in the
Application Angle joining process and define the
Clamping part fastening’s characteristics, such
Drawing Monitoring variables as tightening torque.
Part for joining Time / path These variables are used to
Corrosion protection Torque monitor the joining process so as
Pre-drilling Angle to maintain optimum fastening
Initial application characteristics.
Material thickness
Leak requirement Strip-out
Material Tso
Safety criticality
Torque [Nm] Tt
Fastener Process range Ttf
Dimensions
Undercut feature Tight torque
Shape of drive
Quantity required Zeit [s]
Initial sample
Tensile strength
Corrosion protection
requirements

Torque curve

As joining points are validated the torques produced, such as thread forming
teonrcqeudeb(yTtthf)earnodtasttiroipn-sopuetetdoarnqdueax(iTasol)joairneindgetfeorrmceinveadri.aTbolreqsuaensdacreaninvfalury- for
every combination of sheet metals. The tightening torque (Tt) can be derived
from the characteristic torque curve..

12 110