Electrodynamic displacement sensor for machine tool safety protection

In the modern mechanical manufacturing field, machine tools, as the core equipment for precision processing, have the stability of performance and the reliability of processing accuracy as crucial factors. The oil film thickness between the machine tool spindle and the bearing is one of the key factors affecting the operating state of the machine tool. The change in oil film thickness not only concerns the maintenance of processing accuracy but also directly relates to the safe operation of the machine tool. Therefore, real-time and accurate online measurement of the oil film thickness of machine tools and the safety protection measures based on this are particularly important. Yuanben eddy current displacement sensors, with their unique advantages, have demonstrated significant value in this application. -Machine tool electric eddy current displacement sensor

The Importance of Measuring Oil Film Thickness in Machine Tools

During the high-speed rotation of the machine tool spindle, the oil film formed between the spindle and the bearing by lubricating oil enables non-contact lubrication and support. A reasonable range of oil film thickness is the foundation for the normal operation of the machine tool spindle system. If the oil film is too thick, it may lead to poor dynamic response of the spindle and a decrease in processing accuracy; if the oil film is too thin, it may cause direct contact between the spindle and the bearing, resulting in severe wear or even damage, thereby affecting the service life and processing quality of the machine tool. Traditional methods for measuring oil film thickness are mostly carried out when the machine tool is shut down. By disassembling the spindle system and using physical measurement tools, this method is not only time-consuming and labor-intensive but also cannot reflect the changes in oil film thickness during the operation of the machine tool in real time, and thus cannot effectively prevent machine tool failures caused by abnormal oil film.

The application advantages of eddy current displacement sensors in oil film thickness measurement

As a non-contact, high-precision measurement tool, eddy current displacement sensors have many significant advantages in the online measurement of oil film thickness in machine tools.

Firstly, the non-contact measurement feature of the sensor means it does not need to directly contact the machine tool's spindle or bearings, thus not interfering with the normal operation of the machine tool and not affecting the measurement accuracy and service life due to contact wear. Secondly, the sensor has extremely high sensitivity, capable of precisely sensing minute displacement changes. Even when the oil film thickness changes by only a few microns, it can quickly and accurately detect it, providing reliable technical support for real-time monitoring of oil film thickness. Additionally, it has strong anti-interference capabilities, enabling stable operation in the complex electromagnetic and mechanical vibration environment around the machine tool, ensuring the accurate transmission and processing of measurement signals. Moreover, the fast response speed allows the sensor to track rapid changes in oil film thickness in real time and promptly capture any potential anomalies. Furthermore, the sensor is not affected by oil, water, or other media and can maintain stable measurement performance in the machine tool's lubricating oil environment without the need for additional protective measures, significantly simplifying the structure of the measurement system and reducing maintenance costs.

The Role of Eddy Current Displacement Sensors in Machine Tool Safety Protection

The online measurement system for oil film thickness based on eddy current displacement sensors not only provides real-time monitoring data for the normal operation of machine tools but also offers strong technical support for their safety protection. By continuously monitoring the oil film thickness, it can detect the trend of abnormal thickening or thinning of the oil film in advance and predict potential machine tool failures. Through the real-time monitoring and alarm functions of eddy current displacement sensors, operators can take timely measures such as adjusting the lubricating oil supply system, replacing the lubricating oil, and cleaning impurities to prevent the further development of faults, thereby effectively reducing the failure rate of machine tools, extending their service life, and improving their operational efficiency and processing quality.

Eddy current displacement sensors play a crucial role in the online measurement of oil film thickness and safety protection of machine tools due to their advantages of high precision, non-contact measurement, strong anti-interference ability, fast response speed, and immunity to oil and water media. They provide a strong guarantee for the safe operation of machine tools.