Interactive measurement system for drilling heads and other tools
To randomly check drill heads on their correct dimensions we developed an interactive measurement system for a customer from metal processing. The main problem was the almost infinite number of different drills. At the same time, a high measurement accuracy was desired, but also an easy to handle manual solution with an automated measurement assistant quickly and flexibly adaptable to the drills.
The drills are verified regarding a number of different measures. With a precise optical system, consisting of a high-resolution camera, telecentric optics as well as incident and transmitted lighting, the images for two different application steps are created. With this system measurement accuracies of about 50 µm are achieved.
The process is started by the customer’s control via TCP/IP communication. It initially transfers the target values of the respective drill head to be measured. In the first step, a backlight image of the drill, which is clamped in a mechanical holder, is acquired An automated measurement of length and diameter is conducted here, starting immediately after calling the program. The results of the measuring are compared against the stored target values and the calculated deviation in µm is immediately displayed on the surface. After this step has been carried out sufficiently, the view and the lighting are changed by confirmation of the operator.
In the second step, windows can be positioned at the cutting edges of the drill with a mouse click. This way, the width of the grinding edges can be measured and checked at various points. The measured distances are again compared against the target, the results displayed once more.
If the operator is satisfied with this step as well, all previous measurement values are output to the controller with another confirmation. In the following, the image processing waits for new input data to start the next measurement process.
The system is designed completely modular. Every single function is executable on its own and can be extended by additional features. The company phil-vision offers fast and uncomplicated adaptions in a daily range to different tool types. This way the system costs can be kept low, the system easy to operate and at the same time a µm accurate measurement and an automated process control can be ensured.