In the 3C precision electronics industry, the welding quality of tiny components directly determines the function and lifespan of the product; on the automotive manufacturing assembly line, the precise welding of every body part is crucial to the safety and performance of the entire vehicle; in the aerospace field, laser welding of precision parts cannot tolerate even the slightest deviation.

Behind these scenarios with almost苛刻 requirements for welding accuracy, the AKUSENSE MLD35 laser displacement sensor is silently playing a crucial role, especially in the workpiece measurement stage before laser welding, where it is a true "behind-the-scenes hero" for precise positioning.

Before the widespread application of laser welding technology, traditional workpiece positioning methods mainly included mechanical limit and visual positioning.

Mechanical limit uses physical devices to fix and position the workpiece. Although it can guarantee positioning accuracy to a certain extent, mechanical parts are prone to wear after long-term use, leading to a decrease in positioning accuracy. Moreover, for workpieces with complex shapes or special materials, mechanical limit is often difficult to achieve precise positioning.

Visual positioning uses a camera to capture workpiece images and determines the workpiece position through image processing algorithms. However, this method is greatly affected by lighting conditions. In strong light or dim environments, image quality will be greatly reduced, thus affecting the accuracy of positioning. In addition, visual positioning systems are usually more complex, more expensive, and require more computing resources, which limits their application range to a certain extent.

We recommended the AKUSENSE MLD35 series to our client engineers. This is a high-precision laser displacement sensor based on the triangulation principle, which has a series of remarkable features, making it an ideal choice for precise positioning.

♦ High-Precision Measurement: Precise Control Down to the Millimeter

The MLD35 has a linear accuracy of up to 0.07% F.S, which means it can measure the position information of the workpiece with extremely high precision. In laser welding, even a small positional deviation can lead to a decrease in welding quality, and the high-precision measurement of the MLD35 ensures that the workpiece is precisely positioned, laying the foundation for high-quality welding.

♦ Ultra-Fast Response: Agile Real-Time Tracking

Its response time can be as fast as 100μs, enabling real-time tracking of workpiece position changes. During the workpiece positioning process, various unexpected situations may occur, leading to slight changes in the workpiece position. The fast response capability of the MLD35 can promptly detect these changes and feed the data back to the control system in real time, ensuring timely and accurate positioning.

♦ Low Temperature Drift: Reliable Guarantee of Stable Performance

In industrial environments, temperature changes are unavoidable. The MLD35 has a temperature drift of only ±0.08%F.S./℃, maintaining stable measurement performance even under significant temperature variations. This characteristic allows it to work reliably in various complex industrial scenarios, providing a stable guarantee for workpiece positioning.

♦ Non-Contact Measurement: Gentle Care for Non-Destructive Positioning

The MLD35 uses a non-contact measurement method, avoiding damage to the workpiece caused by mechanical contact. For workpieces with high surface precision requirements or special materials, non-contact measurement ensures the integrity and quality of the workpiece, and is suitable for workpieces of various materials and shapes, greatly expanding the application range of laser welding technology.

When the workpiece is placed on the positioning device, the MLD35 laser displacement sensor immediately starts working. It emits a laser beam and receives reflected light, calculating the displacement by measuring the change in the position of the reflected light spot on the object's surface. It has the advantages of high precision, non-contact, and fast measurement.

The sensor transmits the measurement data to the control system in real time. The control system compares the data with the preset positioning parameters and quickly calculates the deviation between the current position and the target position of the workpiece.