Vibration and ultrasonic welding

Vibration welding is one of the friction welding processes. A distinction is made between linear and orbital vibration welding. Depending on the process, the parts to be joined oscillate differently. In both processes, the parts to be joined are pressed together and rubbed together by vibration. These oscillating movements heat up the parts to be joined and they plasticize. After a short cooling down period, a permanent bond develops. The linear process can be combined with infrared preheating, which in many cases means that the friction phase is suspended. By vibration welding almost all polymers can be joined together, with very short process times.

  • High strength of the weld seam even under high pressure loads

  • Especially suitable for media-carrying components

  • Different materials can be joined together

  • Short welding cycles

  • Very well suited for large-area welds

  • High degree of automation / reproducible process


Ultrasonic welding belongs to the category of pressure welding processes and can be used both in plastics processing and for metallic materials. In this case the connection is made mechanically by generating alternating current. In the process, ultrasonic vibrations and heat are generated, which are transferred in parallel to the respective workpieces under pressure. Short process times can be maintained by ultrasonic welding.

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