38MM Diameter 28Khz Ultrasonic Welding Transducer for Portable Spot
Welding
Description:
Ultrasound, as its name implies, exceeds the sound waves of
conventional sound waves. Sound waves are longitudinal waves that
can be felt by the human ear and have a frequency range of 16 Hz to
20 kHz. When the frequency of sound waves is lower than 16 Hz, it
is called infrasound wave, and when it is higher than 20 kHz, it is
called ultrasonic sound wave.
Specifications:
| Model | QR-3828-4BZ |
| Frequency | 28khz |
| Output power | 800 watt |
| Joint bolt | 1/2-20UNF |
| Ceramic disc Diameter | 38mm |
| Qty of ceramic discs | 4pcs |
| Capacitance | 7.5-12nf |
| Amplitude | 8 um |
| Application | Plastic welding machine |
Ultrasonic application characteristics:
1. Beam characteristics
Because the wavelength of the ultrasonic wave is short, the
ultrasonic ray can be reflected, refracted, and focused as well as
the light. Obey the laws of geometric optics. That is, when the
ultrasonic ray is reflected from the appearance of a substance, the
incident angle is equal to the angle of reflection. When the ray
passes through one substance and enters another substance of
different density, refraction occurs, that is, the direction of the
insertion is changed. The greater the difference in density of
matter, the greater the refraction of the hot riveting machine.
2. Absorption characteristics
As sound waves propagate through various materials, the intensity
gradually weakens as the propagation interval increases, because
the material absorbs its energy. Regarding the same substance, the
higher the frequency of sound waves, the stronger the absorption.
Regarding a sound wave with a certain frequency, it absorbs the
most harmful when it propagates in a gas, and absorbs weakly when
it propagates in a liquid, and absorbs minimally when it propagates
in a solid.
3. Ultrasonic energy transfer characteristics
Ultrasound has been used in various industrial sectors in the past,
and the main point is that it has much stronger power than sound
waves. Why is there a powerful power? Because when the sound wave
reaches a certain material, the molecules in the material also
follow the vibration due to the action of sound waves, the
frequency of the vibration and the frequency of the sound wave, and
the frequency of the molecular vibration determines the speed of
the molecular vibration. The higher the frequency, the greater the
speed.
The energy obtained by the material molecules due to vibration is
determined by the square of the vibrational velocity of the
molecules, in addition to the mass of the molecules. Therefore, if
the frequency of the sound waves is higher, the higher the energy
of the material molecules, the higher the frequency of the
ultrasonic waves. It can be much higher than sound waves, so it can
make the material molecules get a lot of energy; in other words,
the ultrasound itself can supply enough power for the material.
4. Sound pressure characteristics of ultrasonic waves
When sound waves enter an object, the vibration of the material
causes the material molecules to contract and dense, which will
change the pressure on the material. Due to the vibration of the
sound waves, the additional pressure phenomenon is called sound
pressure.
38MM Diameter 28Khz Ultrasonic Welding Transducer for Portable Spot
Welding
