Dukane Understanding Dynamic Trigger force settings on a pneumatic ultrasonic press syste Design Guide

Dukane
Brand
Dukane
Model
Understanding Dynamic Trigger force settings on a pneumatic ultrasonic press syste
Type
Design Guide
Microswitch
Air Cylinder
D
irection of
slide
travel/force
Horn
Die Springs (2)
Bearing
Assembly
Cast Housing
Resistance
from horn
contacting
workpiece
Adjustable Target
Dynamic Triggering
Dynamic Triggering
The dynamic trigger mechanism has
three functions:
1. Enables the user to select the
amount of force applied to the
workpiece before ultrasonic energy
is initiated. (See Trigger Pressure
Setting Graph on back.)
2. Provides switch closure to initiate
the ultrasonic energy.
3. Maintains constant force on the
workpiece via die spring reaction
ensuring consistent energy trans-
mission to the melt zone.
Triggering Sequence
1. The horn contacts the work-piece.
The die springs begin to compress
because they are captured between
the slide and the air cylinder.
2. The microswitch and the adjust-
able target make contact, and the
microswitch closure activates the
ultrasonic energy.
3. The die springs assure that constant
force is applied to the workpiece as
the plastic melts down.
Intelligent Assembly Solutions
Dukane Corporation • Ultrasonics Division • 2900 Dukane Drive • St. Charles, Illinois 60174 USA • TEL
(
630
)
797-4900 • FAX
(
630
)
797-4949
www.dukane.com/us • e-mail: [email protected]
Form No. 10931-F-13
The graph shows the trigger setting and air pressure setting required to have a particular amount of force applied
to the workpiece when the ultrasonic energy is initiated. The graph shows typical values. The actual amount of
force applied depends on the mass and the surface area of the horn.
Trigger Pressure Setting Graph
for 20kHz Heavy-Duty Press/Thruster
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 50 100 150 200 250
0 10 20 30 40 50
DPC Trigger Pressure Dial Setting
iQ Trigger Pressure Dial Setrting
Force (lbs) repeatability 2 lbs
700
600
500
400
300
200
125
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Dukane Understanding Dynamic Trigger force settings on a pneumatic ultrasonic press syste Design Guide

Dukane
Brand
Dukane
Model
Understanding Dynamic Trigger force settings on a pneumatic ultrasonic press syste
Type
Design Guide
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