Vibration Welding Design Guidelines
Discover the vibration welding process
Weld Joint Design
|T||Weld Rib Thickness||> 1.5 mm||> 1.5 mm|
|none||Weld Rib Height||< 3 × T||< 3 × T|
|W||Weld Surface Width||T + Amplitude||T + Amplitude|
|A||Weld Angle||< 10°, ideally 0°||< 15°, ideally 0°|
|D||Weld Depth||0.8 − 1.0 mm||0.8 − 1.0 mm|
|H||Return Flange Height||> 2 mm||> 2 mm|
|R||Return Flange Thickness||> 1.5 mm||> 1.5 mm|
|F||Weld Support Width||3 − 5 mm||3 − 5 mm|
|C||Internal Component Clearance||N/A||> 0.5 mm|
|B||Flash Retaining Rib Height||1.5 mm||1.5 mm|
Amplitude: High-frequency (240 Hz) amplitude is typically 0.4 – 1.8 mm. Low-frequency (120 Hz) amplitude is typically 1.8 – 4.0 mm.
Vibration Welding Angles
It is important to have a good vibration axis. In order for one component to be able to vibrate against the other, one axis must be as flat as possible to allow for the motion. The maximum angle should be less than 10°. Hybrid vibration welding may allow for angles up to 15°, but the parts should still be kept as flat as possible in the direction of vibration welding.
The assembly may be angled in the axis opposite of the direction of vibration as shown below.
Weld Surface Contour
To illustrate this concept further, the blue line in the next image shows the contour of the weld surface in the taillamp example. The green surface illustrates the basic curvature of the taillamp’s weld surface. It is only possible to vibrate in the direction perpendicular to the curvature.
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