For welding technology, there are many uncontrollable factors in manual welding operation: manual welding affects welding quality, and automatic welding automation and intelligent operation mode can ensure that the divergence, fluctuation and accuracy of welding quality tend to be consistent as much as possible; Manual welding affects production efficiency and yield, and automatic welding can ensure production capacity and make it a quantifiable standard. Manual welding can not avoid the harm of harmful gases to workers, and automatic welding only needs limited manual assistance, which reduces the labor intensity of workers and improves the safety of welding process. The displacement sensor can be used in the displacement measurement and control system of automatic welding machine, so as to realize its automatic operation and precision control.

Automatic welding machine is a kind of automatic welding equipment based on sensor technology, electromechanical control technology, single chip microcomputer control technology, PLC control technology and numerical control technology. Widely used in plastics, automobile manufacturing, electronics and household appliances manufacturing, metal processing, steel structure, pressure vessels, machining manufacturing, shipbuilding, aerospace and other fields. It can greatly improve the appearance and internal quality of welded parts, ensure the stability of their quality, improve the labor environment, reduce the labor intensity, welding skill requirements and production costs, and improve production efficiency.
Displacement sensor is used in automatic welding machine displacement measurement and control system, which can be used in manipulator loading and unloading control, welding workpiece clamping position control, welding point position control, welding workpiece quality inspection control and other stations to form a complete set of automation system, which can complete the work of workpiece from assembly, welding, detection to output at one time. Due to cost considerations and production scale constraints, many enterprises will choose manual loading and unloading to reduce the design cost of production lines.

The working environment of automatic welding machine is relatively harsh, and the working current is large, which can have a great impact on the accuracy of equipment measurement and control system. The linear displacement sensor has simple structure, good stability and good anti-interference performance, and can adapt to the harsh working environment of welding process. Because of its low price, it is more suitable for large-scale application of industrial intelligent equipment.