In simple terms, the production process of automobiles mainly includes seven processes: casting, forging, cold stamping, welding, metal cutting, heat treatment and assembly. Among them, the welding process is generally completed in the welding shop, which is also an indispensable important link in the automobile production process.

　　 Due to the large number of production lines in the welding shop and the high degree of intelligence, the amount of sensors used for non-contact detection is large, especially inductive sensors, which are mostly used to locate the position of the body in the process of body welding. However, due to the use of a large number of welding equipment and complicated working conditions in the welding process, the choice of sensors has always been a problem that plagues customers.

It turns out that the factory uses sensor shell materials of other manufacturers to resist welding slag accumulation and poor temperature resistance performance. During use, due to the phenomenon of welding slag splashing when the spot welding machine is welded at high temperature, it often occurs on the sensor sensing surface and the casing. There is accumulation of welding slag. Since the welding slag is a metallic substance, once accumulated too much, it will disturb the magnetic field generated by the internal coil of the sensor, resulting in the failure of the detection of the sensor; at the same time, during high temperature welding, the temperature of the welding slag is usually higher, which will cause the sensor shell and the interior The damage of the circuit will seriously shorten the service life of the sensor.

　　 In addition, there are many electric welding equipment on the welding production line, and the use environment is relatively complex. A large amount of electromagnetic interference is generated, which often causes sensor malfunction and seriously affects the normal use of inductive sensors. Therefore, field personnel proposed the need for sensors that are resistant to welding slag accumulation and strong resistance to magnetic field interference to prevent malfunctions and damage.

  solution

In response to the above requirements and working conditions, Turck technicians have recommended UPROX+ with Teflon coating, anti-welding spark splashing, and strong magnetic field interference resistance, after in-depth exchanges on the spot with full understanding of the automotive industry process. Product: NI20U-MT30-AP6X-H1141, satisfactorily solved the customer's problem.

　　The new UPROX+ series sensor with Teflon coating is made of German advanced technology to uniformly, seamlessly and tightly coat Teflon on the entire sensor housing, sensing surface and installation accessories. The high temperature resistance of the Teflon coating allows the sensor to withstand high temperature welding sparks; and once the welding slag splashes on the Teflon coating, it will immediately fall. With this feature, the sensor prevents the accumulation of welding slag to the greatest extent. , Which effectively protects the internal circuit from damage, and also avoids the occurrence of induction failure caused by the accumulation of welding slag on the sensing surface of the sensor.

At the same time, the NI20U-MT30-AP6X-H1141 sensor is also one of the new UPROX+ series sensor series products, which has all the advantages of this series of sensors. Because it uses a patented flexible ferrite-free core coil, plus special internal shielding Processing, thus effectively preventing the interference of the strong magnetic field during the electric welding process, completely avoiding the malfunction of the sensor, thereby achieving the precise positioning of the body during the welding process. After the model is selected, a trial operation test was performed at several installation locations on the site, and the operation effect was very satisfactory. The welding slag could not form accumulation on the sensor surface, which met the customer's use requirements.

　　Add value to customers

　　For the automotive welding process, the new UPROX+ series products with Teflon coating have a wider application space.

First, through repeated dynamic welding spark tests, the copper shell and Teflon coating can effectively resist the adhesion of welding slag to the sensor surface, and also enhance the local temperature resistance of the sensor. The earth extends the service life of the sensor, so that the customer's purchase cost is greatly reduced.

　　Second, this series of products have all the advantages of UPROX+ series products: a rich shell form that is easy to install; high protection grade of IP68; excellent electromagnetic compatibility; extremely high anti-electromagnetic interference characteristics. In this way, in the strong electromagnetic interference environment of the automobile welding process, the sensor is still easy to use. This greatly reduces the customer's selection time and improves work efficiency.

　　 Third, UPROX+ series products can replace multiple traditional sensor models with a new sensor model, which allows customers to use fewer types of sensors to meet the needs of all production applications and reduce the number of spare parts. In particular, the automotive industry has many requirements and complex applications. Using UPROX+ series products can avoid extra costs for special models.

To sum up, the excellent characteristics of the copper-plated Teflon shell against the accumulation of welding slag and the advantages of the new UPROX+ series products against strong magnetic field interference, the new UPROX+ series products with Teflon coating can be said to be a car welding workshop A tailor-made product has solved the problem of using the sensor in the automobile welding workshop. Thanks to this, the efficiency, stability, and reliability of the body welding system of the customers of the Great Wall Automotive Welding Workshop during the design, selection, installation and use process have been further optimized and improved, achieving the effect of improving efficiency and saving money.