Introduction
In industrial maintenance and repair, accurate measurements are crucial to address equipment failures and improve operational efficiency. Metrology 3D scanners like the FreeScan UE 11 are ideal tools in these cases – they can capture accurate, precise 3D data in minimal time. The results can be used for reverse engineering, iterative design, and other CAD-related applications.
This article explores how SHINING 3D partner ATEGROUP aided a customer in repairing a SAG (semi-autonomous grinding) mill through 3D scanning and CAD simulation.
Problem: Damaged Trunnions
ATEGROUP’s customer uses a SAG mill in its value chain, to grind down materials. While few details are disclosed to maintain the client’s anonymity, it’s clear that material preparation is always a crucial part of production. Material quality sets the basis for product quality.
However, the customer identified that their SAG mill was damaged; the materials were leaking out of the machine during the grinding process. They quickly found that the machine’s inlet and outlet trunnions, vital components responsible for material transfer, were cracked.
With materials leaking out of the mill, the team was facing a serious issue. It not only concerned operational efficiency but employee safety as well.
Solutions: 3D Scanning and Reverse Engineering
To repair the trunnions, the client chose ATEGROUP, a Colombian company providing 3D scanning and reverse engineering services. They utilize a range of SHINING 3D scanners to provide these services.
ATEGROUP set two goals for this project:
● Determine the most suitable technique for reinforcing the trunnions
● Obtain accurate 2D drawings of the trunnions and drive units for production machining
The team went through several steps to achieve these objectives.
3D Scanning
ATEGROUP’s first step in this project involved 3D scanning parts of the SAG mill. For large parts around 2.5m to 3m, the 3D scanner’s portability and speed were critical. The team was able to easily 3D scan all around the mill with the lightweight FreeScan UE 11.
After placing markers on the mill’s metallic surfaces, Data can be quickly captured. FreeScan UE 11 projects 11 crossed laser lines to quickly acquire (1.35M points per second) object geometry.
Reverse Engineering
With the 3D point cloud obtained from the previous step, the team proceeded to the reverse engineering phase. They processed the scan data and extracted the necessary measurements and geometries with Geomagic Design X.
ATEGROUP meticulously recreated the components in a digital, 3D environment:
Simulation Analysis
Last but not least, ATEGROUP’s engineers performed a simulation analysis using the scan-based CAD models to identify the optimal repair solution. Via their simulation software, they replicated the operating conditions and applied stress factors to the digital trunnions.
This allowed them to analyze each component’s behavior under different scenarios, assess potential failure points, and determine the most effective repair method.
Results
With the FreeScan UE 11, ATEGROUP was able to reach its two goals after reverse engineering and simulation analysis:
● Suggest the most efficient and robust repair solution for the trunnion
● Provide accurate 2D drawings of the parts for later production
Regarding the first point, the team suggested using an A36 steel liner. This provided the right structural support to address the leakage problem.
The detailed and accurate 2D drawings enabled the customer to ensure the proper fabrication of the parts. It saved them significant time and resources compared to manual measurements and drawings. With a 3D scan and the right software, engineers can generate 2D drawings in a few clicks.
Conclusion
Digital simulation is an effective method to provide long-lasting, robust repairs for industrial parts and machines. And to obtain accurate simulations, accurate 3D data is crucial.
By using the FreeScan UE 3D scanner to capture the SAG mill, ATEGROUP was able to rely on metrology-grade data. They quickly found the most suitable fix for their customer, who needed to address this critical issue to pick up production again and ensure their employees’ safety.
Click on the following link Metrologically Speaking to read more such blogs about the Metrology Industry.
