A new system for tracing camshafts is to be installed at an automobile manufacturer for engine production, as the previous system did not allow 100% traceability.
The traceability solution comprises engineering, hardware and software, and integration into the system and was implemented on the basis of the Hawkeye 1515 HD camera code reader and the PC-based DMx AutoID+ image processing system. All cameras are connected to Ethernet and can be individually configured via a central PC. The camshafts are produced on a total of seven parallel production lines.
At the beginning of a line, the camshafts are first marked by a laser marker with a data matrix code with a consecutive number and immediately read in to check whether the marking is complete and legible. Incorrectly marked parts are automatically ejected. This is followed by the individual processing stations with the various processing steps, whose data is transferred to the control system. After each machining step, the code is read in again by a total of seven code readers per line and forwarded to the control system, which can then track the machining steps via the sequential number of the workpiece. If, for example, the code is not readable from the processing due to adhering chips, the part is automatically ejected and subjected to a manual check. The finished camshafts are finally checked for dimensional accuracy in a measuring station and the IO parts are then laser marked and verified with a further data matrix code.
100 % traceability has been achieved with the new system, each individual production step can be tracked by the control system. The inspection times due to the installed image processing are negligibly short for the cycle time.