Piezoelectric components act as the driving source for vibrating level switches and are the key components of the product structure. During the R&D and production process, we found that the surface finish of metal components such as clamp rings, support rings, and bridging blocks in piezoelectric components has very high requirements. Take the piezoelectric component of the vibration tuning fork liquid level switch as an example, the top of the compression bridging block and the compression ring forms an arc-shaped “joint†(as shown in FIG. 1 ), and exerts a certain pressure on the “joint†through the two screws. To achieve a suitable preload force on the piezoelectric ceramic. If the surface smoothness of the parts where the clamp ring and the bridging pieces run in each other does not meet the requirements (the surface finish of the lathe operator must be 0.8 μm, as shown in Fig. 2), the rough surface with burrs (as shown in Fig. 3) will cause compression of the joints. "Activity is not a direct result, directly affecting the drive of piezoelectric ceramics, mainly as the amplitude of tuning fork vibration is weak, and even it will not start vibration, but it will affect the production efficiency, and it will affect the quality of the product.
How to determine whether the compression ring and bridge block are in good condition? Firstly place the pressing ring face down on the desktop, and then the middle of the bridging block is concave and close to the convex surface of the pressing ring. Press and hold the bridging block by hand and slide it back and forth through the wrist force. The finish is good and the arc surface is matched. Good sliding, no resistance; smooth finish or burr, will slide when sliding back and forth, left and right, activities are not smooth.
Counted for the automation of its production of Ring-11 tuning fork level switch piezoelectric components parts developed a strict surface finish processing requirements, and the development of relevant processing technology and inspection documents to ensure that piezoelectric components work freely, fork body vibration is light and efficient, Make the factory product performance indicators reach 100%.
The above is related to the "surface switch requirements for piezoelectric switchgear components of liquid level switch". For more information on level switches and magnetic flip plate level gauges, please pay attention to WeChat public number: Jiweimeter. (The article is taken from:, please indicate the source.)
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