|
The laser-based measuring system for brake disks
uses up to 6 laser sensors and a camera to inspect
characteristics such as
- axial run-out
- radial run-out
- parallelism
- disk thickness
- waviness
- flatness
- position of locating bores
and many more. All measurements are perfomed
without contact.
Comparative measurements on genuine brake disks
perfomed with a tactile measuring system and
coordinate measuring equipment show excellent
correlation between the results of the different systems.
|
The advantages of non-contact laser measurement are
- speed,
- robustness, and
- flexibility.
To switch from one type of disk to another, only
the measuring plan has to be changed.
There is no wear of surface feelers as in
conventional tactile measuring systems.
The lifetime of the laser diodes used in the laser sensors
usually reaches 100,000 hours of operation.
This leads to almost neglectable cost for wearing parts. This means
that the payback period for the measuring system is quite short.
All NoKra measuring systems use a standardized software library
as their basis. This leads to ease of use for the operator and
provides common interfaces, like Profibus, to the production
line into which the measuring system is integrated.
Measurement results are calculated and displayed immediately.
This enables fast feedback to the production process, which
leads to reduction of flaws in the production process and
reduction of rejects. This feedback and the resulting changes in the
production process may even be fully automated.
All measuring results are stored in the qs-stat data format.
|
Measuring system analysis (MSA) criteria met for:
| Characteristic |
Production tolerance |
| Thickness consistency within a 90° section |
3 μm |
| Thickness consistency within a 180° section |
5 μm |
| Flatness |
10 μm |
| Parallelism |
20 μm |
| Position of locating bores |
200 μm |
| Diameter of locating bores |
50 μm |
| Axial run-out |
20 μm |
| Radial run-out |
50 μm |
| Distances |
20 μm |
|
