20Khz Ultrasonic Metal Welding Equipment For Dissimilar Metal Sheet Welding

Dissimilar Metal Sheet Welding by 20Khz Ultrasonic Metal Welding Equipment

Description: 

Ultrasonic metal welding is a fast, clean and economical technology that is widely used in various automation industries.

The ultrasonic metal welding process is a process between cold press welding and friction welding that utilizes high density energy generated by high frequency mechanical vibration. The mechanical vibration of the welding head of the ultrasonic metal welding is parallel to the surface of the workpiece. During welding, the static pressure acts perpendicularly on the welding surface through the welding head, and at the same time superimposes the shearing force of the high-frequency vibration. When the shearing force exceeds the elastic limit of the material, the part of the contact surface of the workpiece begins to slip. This shearing force During the welding process, the direction is continuously changed at a frequency of tens of thousands of times per second, and the dirt on the surface of the workpiece is broken and removed. The surface of the pure metal begins to contact in multiple points. With the continuation of high-frequency vibration, the area of pure metal is continuously expanded. Until it expands into the entire weld zone, at the same time atom diffusion occurs on the contact surface, and the metal recrystallizes to form a fine grain structure and exhibits cold metal deformation characteristics.

Specifications:

Purchasing essentials for ultrasonic metal spot welding machines:

1. For different weldments and materials, amplitude is the key, and the texture is important detail. Ultrasonic welding is like a double-edged sword for amplitude requirements. It is too small to be welded and damaged. This directly requires the welder to have a continuously adjustable amplitude function.
2. The best control method in ultrasonic welding is the energy control mode, which controls the consumption of each welding.
3. Choice of welding head mode: The welding head is divided into two types: the body welding head and the overall welding head. The advantage of the split weld head is that the replacement cost is low. However, there are many disadvantages, such as the heat generated by the difference in sound speed between the two materials. From a technical point of view, the integrated welding head has an absolute advantage.
4. Rack structure problem: The most important one is the fixed mode of the welding head and the secondary rod. The metal welding generally faces a large pressure and is lateral, which requires the welding head and the secondary rod to be fixed. Must be hard fixed. What is the hard fixing method, that is, the fixing is metal-to-metal tightening, and the corresponding one in the plastic welding ring is a rubber ring or nylon gasket for buffering. This method cannot be used in metal welding: no limit .
5. Pressure control structure: A good welder must have a good pressure control mechanism. The electric proportional valve or the precision pressure regulating valve is a pneumatic control valve with feedback, which can better control the stable air pressure.

Dissimilar Metal Sheet Welding by 20Khz Ultrasonic Metal Welding Equipment