A solution for assembly in household appliance field: boilers production

Introduce into the existing turntable, which includes 12 phases for the production of boilers components, 3 additional workstations for

1.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.Tightening of M6 screw for fixing the boiler resistance on the flange, at 6 Nm

3.Tightening of a magnesium anode on the resistance cup at 10 Nm

Solution

Fiam designed and manufactured 3 independent stations that cope with 3 tightening needs and integrate perfectly into the pre-existing turntable.

STATION 1: Feed unit, "pick and place" and tightening

An assembly station complete with pneumo-electric system and PLC, scope of supply:

• screw feeding system complete with vibrating bowl and linear feeder (A)

• "pick and place" system to pick up and position the screw (B)

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

STATION 2: tightening module with automatic screw feeding MCA

Ideal for the integration into the existing production lines and when it is necessary to tighten medium and large number of screws at high speed. The module includes an DC nutrunner motor (with current control of the torque plus angle) model 15MCB20C1 built-in on a double movement fastening slide

The solution also encompasses, TCS-B15E feed and control unit that in addition to integrated motor electric feeding, programming and control of the tightening cycle, displays torque angle values discriminating the ok/nok cycles. 5 control strategies of the tightening process through 4 available programs

STATION 3: Tightening with air shut-off nutrunner motor

Features air nutrunner motor installed on a fastening slide that provides a perfect approach of the motor, and then of the tightening head to the component. The tightening is performed from the bottom to the top and the extremely compact dimensions of the fastening slide have allowed the complete integration of the solution underneath the turntable