Auto Checkin System (ACS)

Amit Pradhan
6th Sem Mech

Welding work and inspection by robots
Today in the field of manufacturing quality plays a very vital role. Now a days every industry dares to go for competition. And when the matter of competition comes, the only thing that companies keep in their mind is quality and a good price for particular asset.
That is what ACS tells to automotive sector.
What is ASC?
ACS is the auto checking system which are mostly used in automotive sector. At the body weld shop used in automotive sector. At the body weld shop in the factory, several small pieces of metal parts are assembled and welded to build the body of a vehicle say car.

How ACS are carried out?
ACS are carried by robots which are programmed to use different tools like welding, drilling, painting. The very important thing the ACS do is checking for accuracy at designated locations that are identified based on the safety critical aspects of the vehicle.
Why ACS ?
There are for instance 1685 welding points in Hyundai’s i10 car and 1590 of them are done by robots and by doing this the completion and risk of rejection is very low.
This means the accuracy can be achieved more using web based system, coupled with effective analysis. These robots check 81 points for accuracy of 0.2 mm tolerance using LASER.
How the checking using ACS is done?
ACS is positioned at the end of the weld line so that it can check every vehicle body before it goes for further value addition, such as painting and assembling. ACS uses special software programs to operate the four robots. As the vehicle say car arrives at the ACS boy, the robots position their arms closer to the robots without touching it. The laser guns fitted at the robots shoot the laser beam and with respect to the corresponding time taken during the process.

Fig: ACS Bay


This is much like the way bats find their way about. They send out signals and if come back quickly, it means there is hindrance and hence they have to change the course. In the case of the ACS, if the laser beam doesn’t come back within a specified time limit, it would mean that the welding has been improperly done.

The retrieved in the digital form is correspondingly related with the digital template of ACS and allows the car shell to go through subsequent processes only confirms to the stipulated dimensional accuracies. If the tolerance is beyond 0.2 mm, the system will alert the quality inspector and the line supervisor immediately through a web enabled communication system. Besides it will immediately stop the weld line from the work station where the defect has emerged. A monitor will show the data captured in the form of a graph. The diagram has a couple of red lines in it. Based on the ACS data if blue line is marked between the two red lines then welding operation has executed well.

So, ultimately, ACS helps to check the critical dimension of a car offers better drivability, safety and fuel economy.