35khz vibration ultrasonic welding transducer for ultrasonic rotary welding

Ultrasonic welding is a process bringing to pieces of material together using high frequency ultrasonic acoustic vibrations turned into heat. When dissimilar materials need to be joined together, this type of weld works well, and it is frequently used for joining plastics. This weld requires no adhesives, soldering materials or fasteners.

There is a basic process and idea behind ultrasonic welding, though it is quite customizable for the materials involved. First, the two thermoplastic parts are laid down together in an overlapping manner in a fixture. A horn of aluminum or titanium is brought down onto the top plastic piece and pressure is applied to the parts to clamp them to the fixture.

Next, a vertical motion of the horn at about 20 kHz or 40 kHz occurs during the weld time. Frictional heat is created between the parts via the mechanical vibrations that are transmitted through the materials to the joint surface. Once the heat reaches a melting temperature, the molten plastic can flow and the vibrations stop for the cooling process to begin.

Naming method:

T - Transducer

50 - The outside diameter for piezoceramic ring (mm)

20 - The frequency of the transducer

4 - The number for piezoceramic ring,

D - The type of transducer D means Chinese type,B-Branson type,Z-NTK type.

PARAMETER

Description:

 
1, an ultrasonic stack composed of a converter or piezoelectric transducer, an optional booster and a sonotrode(US: horn). All three elements of the stack are specifically tuned to resonate at the same exact ultrasonic frequency( typically 15,20,30,35 or 40KHz)
• Converter: converters the electrical signal into a mechanical vibration
• Booster: modifies the amplitude of the vibration. It is also used in standard systems to clamp the stack in the press.
• Sonotrode: applies the mechanical vibration to the parts to be welded.
2, an electronic ultrasonic generator(US: power supply) delivering a high power AC sinal with frequency matching the resonance frequency of the stack.
 
The applications of ultrasonic welding are extensive and are found in many industries including electrical and computer,automotive and aerospace, medical and packaging. Whether two items can be ultrasonically welded is determined by their thickness. If they are too thick ,this process will not join them. This is the main obstacle in the welding of metals. However, wires,microcircuit connections,sheet metal,foils,ribbons and meshes are often joined using ultrasonic welding. Ultrasonic welding is a very popular technique for bonding thermoplastics. It is fast and easily automated with weld times often below one second and there is no ventilation system required to remove heat or exhaust.

The transducer converts high-frequency electrical energy into high-frequency mechanical vibrations. And it contains several piezoelectric ceramic discs sandwiched under pressure between two metal blocks. Between each disc is a thin metal plate, which forms the electrode. When a sinusoidal electrical signal is fed to the transducer via the electrodes, the discs expand and contract, producing axial vibrations.

15Khz transducer widely used in high power welding&sealing system.Piezoelectric transducer is the electric charge that accumulates in certain solid materials in response to applied mechanical stress. It is key point of all ultrasonic equipment.The transducer decide the property of the machine.We can supply transducer, also transducer with house and booster.

Advantage

Titanium, aluminum, steel materials of horn optional.

 
High efficiency: high mechanical quality factors and high efficiency of electroacoustic conversion at resonant frequency points.
 
Large amplitude: the structure of the computer optimized design, the ratio of vibration and speed is high, and the amplitude of the front cover plate is large.
 
Big power: under the action of the pre-stressed screw, the energy of the piezoelectric ceramic is exerted to the maximum extent.
 
Good heat resistance: small resonant impedance, small calorific value, wide range of use temperature. High reliability and long life.
 
 
One by one testing to ensure that each transducer performance are excellent.