Laser Soldering Technology Applied in Welding Processing of Automotive Engine Sensors

Laser Soldering Technology Applied in Welding Processing of Automotive Engine Sensors

Engine sensors are essential components of modern automobiles. Based on their location, they are primarily categorized into crankshaft position sensors and camshaft position sensors. According to the technology employed, they are mainly classified into electromagnetic induction sensors, Hall effect sensors, and photoelectric effect sensors.                                              

Illustration of Automotive Engine Temperature Sensor

In the modern automotive industry, the engine temperature sensor is a vital component. It can monitor the engine's temperature changes in real-time, ensuring the engine's normal operation and high efficiency. The laser soldering process plays an indispensable role in the manufacturing of engine temperature sensors.

Laser soldering technology uses laser as a heat source to precisely control and rapidly heat low-melting-point solder. The molten solder flows into and fills the tiny gaps between the metal parts to be welded, forming strong welded joints. This non-contact processing method requires no physical contact, reducing the thermal impact on the components themselves and ensuring consistent welding quality and high reliability.

The application of laser soldering in automotive engine temperature sensors is mainly reflected in the precision welding requirements during sensor manufacturing. Automotive engine temperature sensors, such as intake air temperature sensors and coolant temperature sensors, are crucial for the engine's normal operation. They monitor the temperature of different parts of the engine, ensuring it operates within an appropriate temperature range to optimize performance and prevent damage from overheating.

For the manufacturing of automotive engine temperature sensors, the laser soldering process offers several significant advantages.

Firstly, laser soldering enables high-precision control over the sensor's welding points. The welding points on the sensor need to be tightly connected to other components to ensure the sensor's stability and sensitivity. The high precision of laser soldering can guarantee the accurate position and shape of the welding points, thereby improving the reliability and performance of the sensor.

Secondly, laser soldering allows for rapid control of the welding process. The manufacturing of sensors requires a fast and stable welding speed to enhance production efficiency. As an efficient welding method, laser soldering can meet this demand while maintaining the stability of the welding process, ensuring the production of high-quality sensors.

In addition, the laser soldering process can reduce the formation of a heat-affected zone during welding. The welding of sensors needs to be carried out in a small-sized space, and the formation of a heat-affected zone can easily cause damage to surrounding components. However, the laser soldering process generates less heat and results in a small heat-affected zone, reducing damage to surrounding components and improving the service life and reliability of the sensor.

Illustration of Songsheng Optoelectronics Constant Temperature Laser Soldering System

Advantages of Songsheng Optoelectronics Constant Temperature Laser Soldering System in Temperature Sensor Applications:

1. High laser processing precision, with a minimum light spot diameter of 0.1mm, enabling welding of micro-pitch mounted devices.

2. Localized heating for a short time minimizes thermal impact on the substrate and surrounding components. Different heating specifications can be implemented according to the type of component leads to ensure consistent welding quality.

3. No consumption of soldering iron tips, no need to replace heaters, enabling efficient continuous operation.

4. High laser processing precision, with laser spots reaching the micron level. The processing time/power can be program-controlled, allowing welding in spaces smaller than 1mm.

5. CCD positioning with WYSIWYG (What You See Is What You Get) functionality, eliminating the need for repeated visual positioning corrections.

6. Non-contact processing, avoiding stress caused by contact welding and free of static electricity.

7. Laser is a green energy source, representing the cleanest processing method, with no consumables, simple maintenance and easy operation.

8. Proprietary technology: coaxial integration of laser, imaging, temperature measurement and red light.

In summary, the laser soldering process plays a key role in the production of automotive engine temperature sensors. It not only improves welding quality and production efficiency but also ensures long-term stability of the sensors and safe operation of the vehicle.