FreeScan UE + Photogrammetry – The Essential Assistant for 3D Inspection of Large Parts

March 14, 2022

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INTRODUCTION

Officine Forgiarini - FreeScan UE + Photogrammetry

Officine Forgiarini, founded in 1962 and located in Italy, is a 60-year-old machinery manufacturer, covering industrial automation construction, abrasive making machines, and customized machining of large machines. With its own design, machining, and assembly teams, Officine Forgiarini has gained the trust of many users around the world by focusing on the needs of its customers and giving solutions that truly work


BACKGROUND

Over the years, Officine Forgiarini has encountered many problems, and the team members have continued to find solutions that have made Officine Forgiarini’s business long-lasting. In this article, we present a case study on how Officine Forgiarini solves the challenge of inspection in the production process through the high-precision 3D digitizing solution.


Business development problems:
Lack of good inspection methods for large parts

Many of the parts made by Officine Forgiarini in the mechanical production process are large in size and obtained by milling. After machining, there is a lack of a viable method to check whether the parts produced meet the requirements, especially the diameter of the base of some rings, etc. This directly affects the progress of the next step in the process. If the parts are not qualified, the assembly will not proceed successfully and need to be reworked, consequently extending the work period and preventing delivery within the agreed time frame.


High-precision 3D digitizing solution:
FreeScan + DigiMetric for fast, high-precision 3D inspection of parts

To solve this problem, Officine Forgiarini decided to collaborate with SHINING 3D, by adding the FreeScan laser handheld 3D scanner and the DigiMetric photogrammetry system into their workflow.


OPERATING PROCESS (example of parts on a Kaplan turbine)

1.First, the entire part is photographed by a professional camera to build up the spatial reference marker of the part.

Photogrammetry: In the process of 3D scanning of large objects, cumulative errors can occur during the stitching process of each scan frame. Using photogrammetry to obtain overall marker information can provide a unified coordinate system and eliminate cumulative errors, thus ensuring accuracy control of large object scanning.

FreeScan UE + Photogrammetry  -  The Essential Assistant for 3D Inspection of Large Parts
Data graph for coded markers

2. Next, the reference markers from the photogrammetry are imported into the FreeScan scanning software and the complete 3D data is obtained on this basis.

FreeScan UE + Photogrammetry  -  The Essential Assistant for 3D Inspection of Large Parts
FreeScan UE - The Essential Assistant for 3D Inspection of Large Parts

3. Finally, the complete 3D data from the scan is imported into the inspection software for measurement, including the measurement of the diameter of the arc and the inspection of the assembly interface.


ADVANTAGES

– Rapid 3D inspection of large parts: with the 3D digitizing solution, the conformity of the part can be measured within one day.

– Solving the problem of rework: if a part does not pass, it can be adjusted directly, without having to be returned. To the previous processing phase when the next process is carried out, speeding up the entire work process.


PROSPECTS

Thanks to the high-precision of the FreeScan laser handheld 3D scanner and the DigiMetric photogrammetry system, Officine Forgiarini has been able to obtain the conformity of the machined parts quickly and has successfully delivered numerous machines for professional fields. In the future, Officine Forgiarini will also continue to adhere to the principles of being down-to-earth, striving for excellence, and keeping up with the latest developments to complete more professional machinery production challenges!


PS: Photogrammetry plays an important role in the 3D scanning of large objects, providing a guarantee of high accuracy. Next, SHINING 3D will release a laser handheld scanning device with built-in photogrammetry to provide a more convenient and efficient way to scan and inspect large objects.

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