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2.3.3
The Actuator
The
DCX S Power Supply
does not provide actuator control functions, and does not interface
with actuator signals.
2.3.4
Converter/Booster/Horn Assembly
The Converter
The ultrasonic electrical energy from the power supply is applied to the converter
(sometimes called the transducer). This transforms the high frequency electrical
oscillations into mechanical vibrations at the same frequency as the electrical oscillations.
The heart of the converter is piezoelectric ceramic elements. When subjected to an
alternating voltage, these elements alternately expand and contract, resulting in better
than 90% conversion of electrical to mechanical energy.
The Booster
Success in ultrasonic assembly depends on the right amplitude of movement at the horn
face. Amplitude is a function of horn shape, which is largely determined by the size and
form of the parts to be assembled. The booster can be used as a mechanical transformer
to increase or decrease the amplitude of vibrations applied to the parts through the horn.
The booster is a resonant half-wave section of aluminum or titanium. It is mounted
between the converter and the horn, as part of the ultrasonic stack. It also provides a
clamping point for rigid stack mounting.
Boosters are designed to resonate at the same frequency as the converter with which they
are used. Boosters are usually mounted at a nodal (minimum vibration) point of axial
motion. This minimizes the loss of energy and prevents vibration from being transmitted
to the stack supporting structure.
The Horn
The horn is selected or designed for a specific application. Each horn is tuned typically as
a half-wave section that applies the necessary force and vibration uniformly to the parts to
be assembled. It transfers ultrasonic vibrations from the converter to the workpiece. The
horn is mounted to the booster as part of the ultrasonic stack.
Depending on their profile, horns are referred to as stepped, conical, exponential, bar, or
catenoidal. The shape of the horn determines the amplitude at the face of the horn.
Depending on the application, horns can be made from titanium alloys, aluminum, or
steel. Titanium alloys are the best materials for horn fabrication due to their high level of
strength and low loss. Aluminum horns are usually chrome- or nickel-plated or hard-
coated to reduce wear. Steel horns are for low amplitude requiring hardness, such as
ultrasonic insertion applications.
Содержание DCX S
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Страница 47: ...100 412 183 REV 13 37 4 3 Declaration of Conformity Figure 4 1 Declaration of Conformity ...
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Страница 54: ...44 100 412 183 REV 13 Figure 5 1 DCX S Power Supply Benchtop Dimensional Drawing ...
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Страница 87: ...100 412 183 REV 13 77 Chapter 6 Converters and Boosters 6 1 Converters and Boosters 78 ...
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Страница 145: ...100 412 183 REV 13 135 Appendix A Timing Diagrams A 1 Timing Diagrams 136 ...
Страница 146: ...136 100 412 183 REV 13 A 1 Timing Diagrams Figure A 1 Weld Cycle Figure A 2 Weld Cycle Figure A 3 Weld Cycle ...
Страница 147: ...100 412 183 REV 13 137 Appendix B Signal Diagrams B 1 Signal Diagrams 138 ...
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