"Ultrasonic welding" is an important link in the automotive industry
In the production of the automobile industry, welding is an important link in the production and manufacture of auto parts and car bodies. The comprehensive regulations on quality, high efficiency, cost and other aspects of automobile production and manufacturing have determined that automobile welding production and processing is a multi-disciplinary, cross-industry and technology-integrated production process:
1. The specifications and accuracy of the welded parts are high: in order to better ensure the installation accuracy and dimensional stability of the product, it is stipulated to minimize the accuracy error of the metal sheet parts before welding and the thermal stress and deformation after welding;
2. High requirements for the performance specifications of welded joints: not only to achieve static data and dynamic structural mechanical performance index values, but also to have strict low-cycle fatigue performance requirements;
3. Requirements for high quality and good consistency in mass welding production;
4. High-tempo and high-efficiency requirements for the welding production process;
5. For the quality management and guarantee of "zero defect", the inspection and information management of the automatic technology welding process are clearly proposed.
Regarding the development plan of “lighter, safer, stronger performance and lower cost” for automotive products, today’s automotive welding technology has broadened and expanded rapidly based on the traditional definition and method of raw material connection, and has become excellent. The development of "precision welding production", in which the key welding methods include resistance welding machine, gas shielded welding, plasma welding, laser welding technology (the key is car body tailor welding, welding and parts welding), plastic welding technology, etc. .
Plastic welding technology: Ultrasonic plastic welding transfers high-frequency mechanical vibrations through the workpiece to the interface part to accelerate the movement of molecules. The molecular friction is converted into heat to melt the plastic at the interface, so that the two weldments are truly combined in a molecular connection. Because this molecular motion is completed in an instant, most of the ultrasonic plastic welding can be completed within 0.25 to 0.5 seconds.
Ultrasonic plastic welding is suitable for welding small area, regular structure and thermoplastic plastic parts, such as window motors, built-in audio, foot pads, door panels, clutch forks, spare tire boxes, bumpers, filters, front baffles, etc. .