Assembly of boilers components0 pages

Number 112
March 2015

Tightening automation
Household appliance field: boilers production
Customer need:
Introduce into the existing turntable, which
includes 12 phases for the production of
boilers components, 3 additional workstations for:
1.t Tightening of screw with square washer
on flange with tightening height control (later, in the production line, the
ground wire is inserted by the operator
who completes the tightening)
2.tTightening of M6 screw for fixing the boiler resistance on the
flange, at 6 Nm
3.t
Tightening of a magnesium
anode on the resistance cup at
10 Nm
Flange

Solution:

Detail of the screw with square washer

There are three independent stations that cope with three tightening needs and integrate perfectly into the
pre-existing turntable.

STATION 1:
Feed unit, “pick and place”
and tightening
(D)

(C)

Fiam designed and manufactured an assembly station positioned on a plate, complete
with pneumo-electric system and PLC, scope
of supply:
•t screw feeding system complete with vibrating bowl and linear feeder (A)
• t“pick and place” system to pick up and position the screw (B)
• ttightening module made up of a fastening
slide with 3 vertical positions (rest, screws
picking up, tightening) (C) housing an air
shut-off nutrunner motor (D)
The module moves on pneumatic axis X, Y.
The screw is tightened at specified height
achieving a cycle time of about 5 seconds
from START to END of CYCLE.

(B)

(A)

The height control of the screw (depth) is made
through analog sensor positioned on the fastening slide , adjustable through parameters set on
the PLC.