Ultrasonic welding process control and quality monitoring device and method

Abstract

The invention relates to a process control and quality monitoring device and method for ultrasonic welding. The process control and quality monitoring device comprises a sampling module, a calculationmodule, a data module, a signal module, a man-machine module, a communication module and corresponding connection circuits, wherein the sampling module is connected with the calculation module, the calculation module is connected with the sampling module, the data module, the signal module and the communication module, the data module is connected with the calculation module and the communicationmodule, the man-machine module is connected with the signal module, and the communication module is connected with the calculation module, the data module, the signal module and the man-machine module. According to the process control and quality monitoring device and method, by collecting signals such as the working current and voltage of an ultrasonic transducer, fine control and quality feedback are carried out on the whole process of ultrasonic welding so that a plurality of existing analog ultrasonic power supply welding machines can also realize accurate energy control and quality monitoring.

Description

technical field [0001] The invention relates to a device and method for process control and quality monitoring during ultrasonic welding. Background technique [0002] Ultrasonic welding refers to the method of applying a certain pressure between the objects to be welded under a certain load condition, and concentrating the ultrasonic energy on the joint part to achieve welding; it is widely used in the welding of steel, aluminum, copper and other metals and plastics . The working frequency of ultrasonic welding is usually between 15kHz and 80kHz. The high-frequency current emitted by the ultrasonic generator is converted into high-frequency mechanical vibration after passing through the piezoelectric ceramic transducer, and the ultrasonic energy may be transmitted through the horn, welding head and other components. transferred to the weldment. Therefore, the ultrasonic welding quality is affected by factors such as the size, shape, material, pressure, vibration time, and...

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Problems solved by technology

[0010] On the other hand, there are a large number of analog ultrasonic plastic welding machines in China. Although such equipment is cheap, it is difficult to accurately control the energy output on the one hand, and it is difficult to adapt to higher-precision ultrasonic welding. On the other hand, there is no lack of online quality monitoring system. , which cannot meet the needs of automated production lines

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