Tuning fork level switches are no stranger to instrument people. It is widely used in the industrial field and belongs to the switch measuring instrument for measuring liquid level.In fact, tuning forks were first used for piano tuning and confirmation of hearing impairment characteristics. They were “Y”-shaped steel or aluminum alloy sound generators. Due to the different quality, length and thickness of the fork arm, it can emit pure tones of different frequencies when vibrating. (David Asher, Northern Executive Force.)In the field of industrial control, using the high symmetry and vibration characteristics of the tuning fork, an on-off measuring instrument that can measure the liquid level based on the tuning fork is made.It is precisely because of the symmetry of the fork height that the tuning fork can vibrate regularly at a fixed frequency. Therefore, in the production of fork-level switches, it is very important to resolve the symmetry of the fork body.For this reason, this article introduces the production method of the symmetry of the differential switch fork.Generally speaking, in production, there are two main methods to ensure the symmetry of the fork body of the tuning fork switch:The first type precision casting process is the prerequisite for ensuring the symmetry of the fork heightThe measurement media in the industrial field is complex and diverse. In order to meet the measurement needs of complex working conditions, stainless steel materials with good corrosion properties are the first choice for the production of differential switch fork bodies in the industrial control field.However, in terms of the economy and difficulty of processing, to realize the high symmetry of the tuning fork, it is necessary to have a precision casting process.This is because the material, shape, length, thickness and other parameters of the negative difference determine the natural vibration frequency of the negative difference, and the natural vibration frequency is an important parameter for the negative difference liquid level switch to detect the water level. Therefore, in addition to satisfying the high symmetry of the sound body, precision casting is also indispensable for the high precision of the sound body size.The second type of tuning is an important supplement and guarantee for the high symmetry of the tuning forkAt the technological level, the precision casting level cannot guarantee that the casting parts can meet the production requirements of 100% liquid level switches. In terms of production cost, the higher the symmetry requirement of fork castings, the higher the production cost.Therefore, in the actual production process, it is necessary to add a tuning link and use the necessary equipment to confirm the vibration parameters of each tone car body. Through tuning, modifying and improving the symmetry of the tuning fork body, the tuning fork body meets the production requirements of the liquid level switch.
It can be said that doing the above two points is the key to ensuring the symmetry of the fork body of the tuning fork level switch, and it also determines whether the tuning fork can be successfully applied to the liquid level switch. Manufacturers in the engineering instrument field strictly follow the above two requirements to effectively improve the product quality of tuning fork level switches.
Post time: 21-09-21