35kHz Ultrasonic Riveting Plastic Assembly for Welding Automotive Parts

Description:

In the automotive industry, ultrasonic puncture welding is often used to weld automotive interior and exterior trim parts, such as automotive wheel eyebrow welding, automotive door panel welding, automotive radar bracket welding, automotive spoiler welding, and the like. Ultrasonic puncture welding is a clean and fast connection method without bolts, welding materials, nails or adhesives. It is a method of using plastic ultrasonic vibration energy to produce plastic deformation on the surface of the workpiece and failure under the pressure surface.

Specification:

Principle:

The basic principle of ultrasonic riveting is to convert high-frequency electrical energy into high-frequency mechanical energy acting on thermoplastics in a reciprocating longitudinal movement, generating frictional heat at the plastic/plastic or plastic/metal interface, forming local melting, through controlled melting and shaping plastics. A boss or pin to lock another part.
During ultrasonic riveting, the control flow of molten plastic is used to lock another part (usually another plastic or metal). The preformed plastic pin passes through the hole in the part to be locked, and the high-frequency ultrasonic vibration from the welding head is transmitted to the upper part of the pin. The pin is melted due to the frictional heat and fills the cavity volume of the welding head, resulting in the locking of the spear head. Components. The plastic pin is gradually melted under continuous light pressure to form a rivet. The slight pressure of the horn causes the pin head to form a specific shape (as determined by the end structure of the horn). After the vibration stops, the plastic solidifies and a material is consolidated.

Advantage:

Application:

1. Annular airbag cover riveting:

The airbag walnut wood veneer cover is made by arranging a plastic hollow rivet on the back of the decorative board and then riveting it together with the stamped thin metal plate skeleton. The airbag walnut wood veneer plate combines the surface handleability of the plastic component with the rigid metal structure of the stamped metal, and has the characteristics of good elasticity, no sharp edges, uniform stress distribution, simple and light structure, etc. In the event of an accidental collision, the product can maintain structural integrity without sharp fragments, not only can prevent collision and energy absorption, but also effectively reduce material consumption and reduce the weight of the body. Provides better security.

2. The back of the speaker assembly:

The black part is the inner support/snap structure, the material is ABS+PC plastic alloy, the speaker decorative panel grille is metal mesh, and the frame trim is made of metal silver-gray ABS plastic. The assembly combines the good visual effect of electroplatable ABS plastic with the high strength and high impact resistance of ABS+PC plastic alloy. The red arrow in the figure points to the riveting point. The pre-molded riveting of the ABS decorative cover passes through the corresponding hole in the ABS+PC alloy structural member, and is connected by a flat head riveted joint for better performance. Can reduce weight and processing costs.