As an important symbol of modern civilization, the automobile has quickly become the mainstream tool of mass travel since its appearance. The main production processes around the production of automobiles are also constantly being innovated. Among them, welding is undoubtedly one of the process areas that automobile manufacturers are most concerned about, which directly determines the overall quality of the car.
As an important symbol of modern civilization, the automobile has quickly become the mainstream tool of mass travel since its appearance. The main production processes around the production of automobiles are also constantly being innovated. Among them, welding is undoubtedly one of the process areas that automobile manufacturers are most concerned about, which directly determines the overall quality of the car.
The body shell of the car is a complex structural part welded by thin steel plates, and a body is assembled by hundreds of sheet metal stamping parts through positioning welding, gas shielded welding, brazing and bonding processes. On a main line of automobile welding, it is necessary to weld and assemble the side wall assembly line, the bottom plate assembly line, the body sheet metal assembly and the top cover welded by small parts, and carry out welding and assembly after positioning through the transmission device, fixture, assembly table and other equipment, so as to complete the assembly line of body-in-white welding, which is also the core part of the body welding production line.
Today, in highly automated welding lines, inductive proximity switches, especially inductive switches, are indispensable for the positioning and inspection of individual machines and conveyor lines. So compared with other application scenarios, what kind of sensor can easily meet the application requirements of automotive welding?
The puzzle of choice
In general, there are 3,000-5,000 spot welding steps and multiple main lines in the entire welding process of a car, and the number of welding joints is very high – which means a large number of welding robots are in operation, as well as conveying between production lines. With the increasing degree of automation, a large number of high-precision inductive sensors are required to locate the position of the car body in the body welding process. However, due to the use of a large number of welding equipment and complex working conditions in the welding process, the selection of sensors has always been a difficult problem for customers.
The build-up of welding slag and the high temperature environment during the welding process pose challenges to the sensor's sensing ability and reliability. In addition, there are many welding equipment on the welding production line, the use environment is more complex, and a large amount of electromagnetic interference is generated, which often causes the sensor to malfunction, which seriously affects the normal use of the inductive sensor. Therefore, customers need to carefully identify and select sensors that can resist the accumulation of welding slag and have strong resistance to magnetic field interference to prevent failures and damage.
It's easy
With its full understanding of the processes of the automotive industry, BALLUFF offers a "sharp tool" for automotive welding applications - BES inductive proximity switches. As a Teflon-coated anti-welding spark splash and anti-strong magnetic field interference type with Teflon coating, it satisfactorily solves the customer's selection problem
This inductive attenuation factor 1 sensor detects all metals with high precision, has a large switching distance, has no reduction factor, and is resistant to magnetic fields, making it suitable for strong electromagnetic fields such as welding equipment. In the case of BES inductive proximity switches, the Teflon material is uniformly and seamlessly plated firmly on the entire sensor housing, sensing surfaces and mounting accessories. The high-temperature resistance of the Teflon coating allows the sensor to withstand welding sparks at high temperatures; And once the welding slag splashes on the Teflon coating, it will fall immediately, with this feature, the sensor prevents the accumulation of welding slag to the greatest extent, thereby effectively protecting 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, due to its patented flexible ferrite-free core coil and special internal shielding treatment, BES effectively prevents the interference of strong magnetic fields in the welding process and completely avoids the malfunction of the sensor, so as to realize the accurate positioning of the body in the welding process. After the model was selected, the trial operation test was carried out at several installation positions on the site, and the operation effect was very ideal, and the welding slag could not form an accumulation on the surface of the sensor, which met the customer's requirements.
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