Oxygen sensor is the use of ceramic sensitive components to measure the various types of heating furnace or exhaust pipe in the oxygen potential, by the principle of chemical equilibrium to calculate the corresponding oxygen concentration, to achieve the monitoring and control of the furnace combustion air-fuel ratio, to ensure that the quality of the product and exhaust emissions up to the standards of the measurement components, widely used in various types of coal combustion, oil combustion, gas combustion and other furnaces, such as the atmosphere of the control. Sensors need to be metal package welding, which welding quality of good and bad on the application of the sensor has a great impact, the following to see the laser welding equipment in the welding oxygen sensor technology applications.
Oxygen sensor base is generally 20-40mm diameter stainless steel cylinder, catalytic converter body consists of stainless steel shell, white carrier, vibration damping layer, catalyst, etc., catalytic converter assembly production, the need for oxygen sensor base welded to the catalytic converter shell. Wuhan Ruifeng photoelectric laser seventeen years focus on research and development and production of laser equipment, with many years of experience in laser equipment research and development, product technology is mature, product performance safety and stability. The company follows the business philosophy of "technological innovation, product innovation, service innovation" to provide customers with the best quality products and services.
Oxygen sensor base wall thickness of 5-12mm, catalytic converter body shell thickness of 1mm-2mm, the two thickness difference is large, the existing welding process using arc welding welding molding, the production process, the current is too large easy to cause the catalytic converter shell weld leakage, the current is too small oxygen sensor connection strength is insufficient, so you can choose the laser welding technology, the laser welding machine selection of fiber lasers, lasers with The laser welding machine adopts fiber laser, the laser adopts integrated structure, with the role of safety protection and environmental protection, with the fully enclosed welding cabinet, compact structure and high integration. Gantry welding module equipped with multi-dimensional adjustment of the laser welding head, two-dimensional horizontal CNC high-precision worktable, with special fixtures and fittings to complete the precision welding needs.
Laser welding equipment in the welding oxygen sensor technology applications:
Welding spatter as small as possible.
Oxygen sensor base and catalytic converter body welding, the weld is very sensitive to welding spatter, on the one hand, welding slag produced by welding attached to the oxygen sensor seat and the surrounding area, may affect the sensor signal transmission accuracy, on the other hand, the catalytic converter body is a closed cylinder structure, if there is a weld slag splash to the catalytic converter shell inside, the weld slag can not be automatically discharged, manual cleanup is also very difficult to operate, residual weld slag on the Catalytic converter service life and nvh performance to reach a hidden danger.
The weld should ensure the connection strength and high gas tightness.
The catalytic converter assembly becomes a gas processing device, the overall connection strength and gas tightness requirements of the assembly is high, the oxygen sensor base and the catalytic converter body of the weld also has the same connection strength and gas tightness requirements. Oxygen sensor base general thickness of 6-12mm, catalytic converter body shell general thickness of 1.5mm-2mm, the two thickness difference is large, so the welding process window is very narrow, the fluctuation of the current, the difference in the state of the weld surface, welding gap fluctuations will lead to the catalytic converter shell to produce weld leakage and other defects.
The above is the technical application of laser welding equipment in welding oxygen sensors, automatic laser welding equipment is suitable for welding and processing automotive sensors, not only to ensure the quality of the sensor welding, but also to improve the efficiency of processing. Oxygen sensor catalytic converter body is the catalytic converter assembly performance to reach the most important parts, parts of high quality requirements, high cost of a single piece, the enterprise for the quality of the parts and the qualification rate of concern is extremely high.
