Variable Frequency Ultrasonic Transducer 15Khz for Auto Parts
Welding for sale
Description:
Ultrasonic transducer is an energy conversion device. Its function
is to convert the input electric power into mechanical power
(ultrasound) and then transmit it out, and it consumes only a small
amount of power.
The ultrasonic transducer is mainly composed of a central
piezoelectric ceramic element, front and rear metal cover plates,
pre-stressed screws, electrode sheets and insulating tubes. The
specific composition is shown in the figure below.
1. Rear driver: the cylindrical element on the back of the
piezoelectric transducer, the rear driver is close to the last
piece of piezoelectric ceramic, and the pre-tightening pressure is
usually applied by stacking bolts.
2. Electrode sheet: a thin conductive disc between the
piezoelectric ceramics adjacent to the transducer. The transducer
drive voltage is applied between these electrodes.
3. Front-end driver: Transmit the ultrasonic energy of the
transducer to the horn or tool head. The front-end driver usually
includes a mounting flange for connecting the housing.
4. Prestressed screw: A single stacked bolt passes through the
center hole of the ceramic. After tightening the bolt, the ceramic
will be compressed between the rear driver and the front driver to
apply the required prestress to the ceramic.
5. Piezoelectric ceramics: Piezoelectric ceramics is the heart of
the transducer, a component that converts the electrical signal of
the ultrasonic generator into linear mechanical vibration.
Specifications:
| Model | QR-6015-4BZ |
| Frequency | 15 khz |
| Output power | 2600 watt |
| Joint bolt | M20*1.5 |
| Ceramic disc Diameter | 60mm |
| Qty of ceramic discs | 4pcs |
| Capacitance | 9-13.5nf |
| Amplitude | 10 um |
| Application | Plastic welding machine |
Is the prestress of the transducer larger the better?
Excessive prestress will reduce the performance of the transducer,
which is mainly reflected in the following aspects:
The performance of piezoelectric ceramics changes under the action
of compression bias. In particular, the maximum safe temperature at
which the material can work effectively may be greatly reduced, and
high compressive stress may lower the Curie temperature.
Excessive pretension will cause significant depolarization, and
will also produce unstable impedance and aging.
Excessive prestress will reduce the service life of the transducer,
and in severe cases will cause the ceramic chip of the transducer
to crystallize.
Excessive prestress of the transducer will show a smaller impedance
in the early stage, but the performance of the transducer will
decrease with the passage of time, and it will be accompanied by
high-impedance products.
Variable Frequency Ultrasonic Transducer 15Khz for Auto Parts
Welding for sale
