Automatic assembly of plastic chairs0 pages

Number 113
September 2015

Tightening automation
FURNITURE INDUSTRY: chair frames manufacturing
Customer’s need:
Automatic assembly of 4 components of plastic chairs.
Each component has a number of tightening points
located at different heights also deep into holes.
The solutions has to provide:
• manual load by the operator
• reliability of each rundown
• the possibility of future retrofit

Solution:
Fiam has manufactured 4 semi-automatic tightening
units.
Each workstation, managed by an operator, includes:
t Component customized jig, for its manual load/unload, including sensor detecting component presence
t Control panel to set and check in real time machine
working parameters, displaying error messages for
operator’s rapid intervention
tSelf-feeding tightening module made of a double
stroke fastening slide housing a DC electric (current control) brushless nutrunner motor
t Tightening module moves along 3 linear axis X, Y and
Z equipped with servo motors:
t this solution allows reaching all needed tightening
points with the nosepiece
t All parameters of the tightening process are managed by TCS-B controller that, in addition to integrated
motor electric feeding, programming and control of
the tightening cycle, displays torque and angle values
discriminating the ok/ng rundowns. You can set
among 5 different control strategies of the tightening
process for each of 4 programs available which can
be set using the software supplied with
tSpecial screw heads, featuring friction jaws that
hold the screw from the head rather than the shank:
they allow the head to insert inside deep and tight
tightening spots
tScrew feeding and escapement system. Thanks to
the continuous screw feeding and to the high bowl
feeder capacity, allow faster and more efficient
assembly operations