The production of automotive turbochargers presents technical challenges beyond simple component identification. When one of our clients, a European manufacturer specializing in this field, needed to combine laser marking, pneumatic leak testing, and optical thread verification in a single production process, the standard solutions available on the market were not adequate. Out of this need came FlyPress, an integrated system developed to meet a set of complex and interconnected requirements.
The application context
The company operates in a segment where quality control cannot be delegated to later stages of assembly. The concrete need was to verify pneumatic tightness and thread integrity directly at the marking station, eliminating component transfers between different stations and creating a direct correlation between identification and functional status of the part.
The component had several critical technical issues. The geometry of the turbocharger body, with precision threads and critical mating surfaces, required an accurate handling system. Dimensional variations typical of foundry or machined components required automatic compensations. The demand for full traceability to automotive standards required the marking of DMC codes compliant with AIM-DPM standards and their immediate verification.
Added to this was integration with enterprise information systems. The component had to be uniquely identified, marking data dynamically populated from the enterprise database, and leak test results recorded and correlated with the newly marked code. All within a cycle time compatible with production rhythms.
The integration of three technologies in sequence
The main challenge in designing FlyPress was coordinating different technologies into a smooth sequence of operations. The system simultaneously handles high-speed laser marking, optical analysis for code and thread verification, and pneumatic leak testing, coordinating mechanical actuators, pressure sensors, and real-time vision systems.
The integrated vision system performs multiple functions. It not only verifies the quality of the marked code according to AIM-DPM grading, but governs the entire process. As the component enters the work cell, the camera detects the actual position of the part, compensating for positioning variations of up to several millimeters. This is necessary when working with components from foundries, where dimensional tolerances vary significantly between batches.
Once the position of the component is identified, the system calculates the necessary corrections for laser marking. The laser head, equipped with a 30W or 50W fiber-optic laser according to application specifications, automatically positions itself and marks the DMC code on the metal surface. The choice of laser power depends on the type of surface finish: rough components require higher powers to achieve the necessary contrast, while more conservative parameters are used on machined surfaces.
Immediately after marking, the vision system captures an image of the code and verifies its quality. The verification evaluates contrast, uniformity, and geometric distortion according to AIM-DPM parameters. The system assigns a quality grade (typically required A or B, in some acceptable cases even C) and only if successful does the process continue.
At this point the air-tightness test intervenes. Pneumatic actuators place special seals on the mating surfaces of the turbocharger, and the system pressurizes the component according to defined parameters. Precision sensors monitor the pressure over time, detecting even minute leaks that could indicate defects in the threads or sealing surfaces. In parallel, the vision system performs an optical analysis of the threads, checking for damage, residual chips, or other anomalies that could compromise the final assembly.
This sequence occurs in seconds, but requires precise synchronization. Coordination is handled by an industrial PLC that constantly communicates with all subsystems, ensuring that each step completes correctly before proceeding to the next.
The management software
The software simultaneously manages incoming data streams from the enterprise MES system, coordinates marking and testing operations, and transmits the results to the central database for traceability.
The dynamic population of marking data is a critical issue. The DMC code to be marked contains variable information: unique serial number, production date, lot code, and raw material supplier references. This data is taken in real time from the company database as the component enters the workstation. FlyCAD software handles this integration, ensuring that the generated code complies with industry regulations.
The major complexity lies in the management of abnormal conditions. If the grading of the marked code is insufficient, the software implements a specific procedure: the component is either re-marked in an alternate location, if available, or it is segregated and the database updated with the nonconformance status. Similarly, if the leak test fails, the component is discarded and the system records both the marking parameters and the pneumatic test results, allowing subsequent analysis to identify any correlations between processing defects and leak problems.
Technical solutions to specific problems
Several technical aspects of FlyPress represent concrete answers to real problems that emerged during the development of the system.
Dimensional variability of components was one of the first obstacles. Foundry turbochargers can have dimensional variations of up to several tenths of a millimeter between parts. This variability, if not compensated for, results in out-of-focus markings and illegible codes. The implemented solution integrates a laser distance sensor that measures in real time the exact position of the surface to be marked and automatically drives the Z axis to keep the focal distance constant. This autofocus system ensures consistent quality regardless of component tolerances.
The management of marking dust and fumes is another critical issue. Laser marking on aluminum generates a considerable amount of particulate matter that, if not removed effectively, can settle on the laser head lens, progressively reducing its efficiency. The vacuum system uses a multi-stage configuration: mechanical pre-filters for coarser particles, HEPA filters for fine particulates, and activated carbon filters for volatile compounds. The flow rate of more than 500 cubic meters per hour ensures effective removal even during high-speed markings.
As for the pneumatic leak test system, the main challenge has been to achieve high repeatability in pressure measurements. Even small variations in ambient temperature or stabilization time can affect the results. The system implements pre-pressurization cycles to stabilize the seals and thermal compensation algorithms that take into account the temperature of the component and the surrounding environment. Pressure sensors are calibrated periodically, and the software maintains a measurement history to identify progressive drifts that could indicate seal wear or other problems.
Optical verification of threads requires controlled illumination and specific image processing algorithms. The system uses coaxial illumination to highlight any damage or presence of chips, and image analysis is based on edge detection algorithms optimized to recognize discontinuities of even a few tenths of a millimeter. This capability makes it possible to intercept defects that could cause problems during final assembly, avoiding costly rejects at later stages of production.
Operational results
The implementation of FlyPress has produced measurable results. The direct correlation between marking and functional verification has virtually eliminated the risk of marked but defective components continuing down the assembly line. This has reduced rejects at later stages and improved overall quality indices.
From a production point of view, the reduction in cycle time compared to a configuration with separate stations is on the order of 25-30%. This comes mainly from the elimination of component transfers and the parallelization of some operations: while the pneumatic test is being performed, the vision system is already analyzing the threads, optimizing the use of available time.
Integration with corporate information systems has improved traceability. Each component has a complete record that includes not only the marked code, but also the process parameters used for marking, the quality grade of the verified code, the numerical results of the leak test, and the outcome of the thread verification. These data are useful not only for regulatory tracking, but also for process analysis and continuous improvement.
Maintenance of the system has proven to be manageable. The modular design allows targeted interventions on individual subsystems without requiring complete disassembly of the machine. Availability of critical spare parts and direct technical support helped maintain high levels of operational availability.
Variants and adaptations
The original project led to the development of several variants of the FlyPress to meet specific needs. There are currently 5 machines operating in Hungary and 3 in Serbia, each with customizations related to component sizes, leak test parameters, or software interfaces with local systems.
Some variants integrate robotics for automatic component handling, completely eliminating operator intervention in the work cycle. The robot picks up the component from the mechanical machining outlet, places it in the FlyPress, and after completion of the tests either transfers it to the next station or segregates it in the nonconformity area depending on the outcome of the tests. This configuration is suitable for high-volume production where labor is a significant cost.
Other implementations have required the development of specific equipment for components of particular geometry. Not all turbochargers have the same configuration of threads or mating surfaces, and this has required the design of dedicated gaskets and mounts to ensure proper leak testing. The modularity of the system allows these fixtures to be changed in a short time, while maintaining the flexibility to handle varying production mixes.
Final considerations
The development of FlyPress is an example of how responding to complex production needs requires multidisciplinary skills and the ability to integrate different technologies. It is not a matter of assembling commercially available components, but of designing a coherent system where each element is optimized to work in synergy with the others.
The key was the ability to understand the client’s production process in detail, identify critical points, and develop specific technical solutions for each criticality. Constant dialogue during all phases of design, prototyping, and fine-tuning allowed the system to be progressively refined until the required performance was achieved. For manufacturers operating in sectors where quality and traceability are essential requirements, integrated systems such as FlyPress represent an evolution from traditional configurations. The higher initial investment is offset by superior operational efficiency, more robust quality, and traceability capabilities that meet even the most stringent requirements.
