In the automotive manufacturing industry, the efficiency and accuracy of automated production lines are directly related to the quality of products and the competitiveness of enterprises.

With the continuous advancement of technology, customers' demand for automated production lines is also increasing, especially in the critical process of screw tightening. The customer expects to achieve real-time detection of screw tightening, ensuring that the screws are not too deep to damage the material and screws, nor will they fall off due to being too shallow.

In this issue, Xiaoming will share with you the classic application case of Akusense sensor MLD25 series sensors in detecting the depth of automotive screw tightening:

Install the sensor directly above the screw, detect the output in real time, and determine whether the screw is in place. Once it is in place, send a signal to drive the equipment to stop to prevent the screw from being too deep and damaging the screw and material

1. The required error is within 0.5mm. Drilling too deep may damage the material and screws, while drilling too shallow may cause detachment

2. The surface of the material is made of highly reflective metal

3. Non contact measurement is required

4. The sensor needs to be installed on a screw tightening shaft, which should be lightweight and easy to use

1. 0.5mm accuracy requirement

The customer expects the sensor to accurately measure the depth of screw tightening, with an error controlled within 0.5mm.

This is because the depth of screw tightening directly affects the quality and safety of the product. If the screws are screwed too deeply, it may damage the material and screws, and even lead to the scrapping of the entire product; If the screw is too shallow, it may not be able to firmly fix the material, resulting in the product falling off or loosening during use.

2. Non contact measurement

Due to the highly reflective metal surface of the material, the customer requests that the sensor be able to use non-contact measurement methods to avoid damage or contamination to the material. Meanwhile, non-contact measurement can also improve the accuracy and stability of the measurement, reducing errors caused by contact.

3. Real time detection and feedback

The customer expects the sensor to detect the status of screw tightening in real time and provide feedback to the control system. In this way, the control system can adjust the working status of the tightening shaft in real time based on sensor data

This can not only improve production efficiency, but also avoid problems of excessive or insufficient tightening.

4. Easy installation and reliability

The customer requires the sensor to be easy to install and debug, with a small size that can be easily installed on a screw tightening shaft