Laser welding is a new and high technology welding method. Its unique characteristics are especially suitable for sensor seal welding. Many sensor factories and manufacturers use laser welding in sensor processing.
Widely used in military, aviation, aerospace industry etc., Sensor is a kind of high precision instrument, which needs to be strict test, requirements and processing. Sensor’s hi-tech value-added depends on high technology and technical processing.
Pressure sensors, hall sensors, photoelectric sensors, temperature sensors, and other needs metal encapsulation sensors generally adopt sealing welding due to environmental conditions. Those kinds of sensors are made of sensitive components and integrated circuits, filled inert gas or vacuum to Isolated outside air, and have strict requirements on pressure, air tightness, weld strength and leak rate. In processing, it required high welding quality, small deformation, and cannot damage their internal components and circuit.
Compare to resistance welding, tungsten argon arc welding, plasma arc welding, electron beam welding, ultrasonic welding, vibration welding, hot plate welding and other sealing sensor welding, laser welding has follows advantages:
• High depth-to-width ratio, deep and narrow Laser welding line.
• Minimum heat input, Small thermal deformation and heat-affected zone.
• High density, Solid welding line.
• Precise control. Laser welding machine has very small focus spot, make it able to precise positioning and improve production efficiency.
• Non-contact welding. Magnetic and air have no negative effect on the laser.
• Due to low average heat input and high accuracy, laser welding can reduce processing costs. At the same time, the cost of laser welding is low, which can reduce the cost of artifacts.
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