Desoutter CVIL II, Руководство оператора, Страница: 61 / 80

01/2018 61 / 80
6159933780
Issue no: 09
CVIL II
11.2 - Torque control and angle monitoring
11.2.1 - Normal mode (continuous)
Torque control strategy coupled with a torque and angle
monitoring is adapted for most assemblies.
It offers:
● The insurance that the tightening operation is
correctly done,
● A regular joint quality.
To reach this performance, we monitor the angle to
detect joint issues, i.e. "cross threads", missing washer,
broken bolt, larger size of bolt; low quality bolt.
In case of batch count, this strategy will detect any
re-tightening of the bolt.
Torque Angle
Time
Target
Peak torque
Final angle
Angle
threshold
Max
Min
Max
Min
The start of the angle threshold counting should be
within the linear area of the torque increase.
The angle measurement takes into account the torsion
/ back torsion of the spindle by measuring the angle
during the torque drop phase, until the threshold value of
the angle counting start is overstepped.
The recorded values are the following: peak torque and
final angle.
Spindle stop
● IF torque ≥ target torque
● OR angle > safety angle
Accept report
● IF min. torque ≤ peak torque ≤ max. torque
● AND min. angle ≤ final angle ≤ max. angle.
11.2.2 - Pulse mode (hybrid)
Torque control strategy coupled with a torque and angle
monitoring is adapted for most assemblies in pulse
mode.
It offers:
● The insurance that the tightening operation is
correctly done.
● A regular joint quality.
To reach this performance, the angle is monitored to
detect joint issues, i.e. "cross threads", missing washer,
broken bolt, larger size of bolt; low quality bolt.
In case of batch count, this strategy will detect any
re-tightening of the bolt.
Final angle
Torque
Time
Peak torque
Angle threshold
Pulse threshold
Run down
torque
Target
Max
Min
Angle
Max
Min
Run down speed Final speed
Continuous Pulse
The start of the angle threshold counting should be
between the run down torque and the first peak torque.
The recorded values are the following: peak torque and
final angle.
Spindle stop
● IF torque ≥ target torque
● OR angle > safety angle
Accept report
● IF min. torque ≤ peak torque ≤ max. torque.
● AND min. angle ≤ final angle ≤ max. angle.