Transfluid DB 2090 ST - Possible Faults and Their Removal; Poor Tube Quality

Trouble shooting
98
9.1 Possible faults and their removal
9.1.1 Poor tube quality
Trouble
Cause
Solution
1.0 Measurement of
angle’s side differs
within the radius
1.1 Tube slips
The pressure at the clamping
cylinder is too low; increase the
pressure by the pressure valve
1.2 Clamping die and and
the pressure die are greased
Clean the tools
1.3 Tube is not positioned
truly to measurement
Use a different tube size resp.
quality
1.4 Tube is not propperly
clamped
Tube must be moved clamped
using entire clamp die
2.0 Tube bend has
strong dimples outside
2.1 Mandrel is too far
forward
Adjust the mandrel to propper
position
3.0 Tube bend has
wrinkles inside
3.1 Mandrel is too far back
Adjust the mandrel to propper
position
3.2 Wrong mandrel rod in
the tube
Exchange the mandrel rod
4.0 During bending
process there is loud
noise
4.1 No lubricant at the wiper
die
Grease the wiper die