Robot Ultrasonic Welding Widely Used in Automotive Industry
Ultrasonic welding forms joints by mechanical high-frequency vibration. The parts to be assembled are clamped by pressure between the oscillation welding head and the fixed welding head, and are then at right angles to the contact surface and receive ultrasonic vibration at a frequency of 20 to 40KHz. Alternating high-frequency stress generates heat at the seam interface, resulting in good quality welds. The tools used for this process are very expensive and therefore suitable for use when the production volume is large. This welding method is only suitable for small parts with solder length not exceeding a few centimeters. Applications include valve and screening procedures for welding medical equipment on multi-head machines, boxes, automotive parts, vacuum cleaner housings, and more.
Ultrasonic welding machine structure principle:
The vibrator and the transmission sub-device are inside the vibrating cylinder and an external welding head is used. The air pressure system and the control circuit are used to raise and lower under preset conditions to complete the operation procedure. Convert 220V, 50HZ to 15KHZ (or 20KHZ) of high-voltage electric energy, using transducers to convert into mechanical energy. Such ultrasonic mechanical vibration, through the transmission, the welding head to the workpiece, and the use of air pressure, the friction effect of the working junction.
What about the uneven stress of ultrasonic metal welding machine?
Generally When ultrasonic operation, the product and the mold surface as long as the contact accuracy can be obtained by the ultrasonic welding machine welding effect, in fact, this is only the surface view, since the ultrasonic vibration vibration, it will produce the sound wave conduction phenomenon.
On the other hand, the energy output from the upper mold (H er n ) has its own error value at each point, and not all the energy emitted from the entire surface is the same. On the whole, there is bound to be a difference in the degree of welding of the product welding line. Therefore, it is necessary to make corrections. How to correct it is to overcome the problem by relying on the horizontal screws of the ultrasonic welding machine itself, or by sticking thinner tape or aluminum foil.