Digital holography in production: an overview

Fratz, Markus; Seyler, Tobias; Bertz, Alexander; Carl, Daniel

doi:10.37188/lam.2021.015

Cited by 41 publications

(30 citation statements)

References 27 publications

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“…AA5754 is used as the upper sheet for all experiments since this leads to less wear at the coupling surface compared to when the harder metal is used on the tool side. The surface roughness of the joining partners is determined by holography, using a Fraunhofer IPM (Institute for Physical Measurement Techniques, Freiburg i.Br., Germany) HoloTop 65M18 [ 29 , 30 ]. The average roughness value Ra is 0.45 ± 0.03 µm for AA5754 and 0.59 ± 0.04 µm for AMZ4.…”

Section: Methodsmentioning

confidence: 99%

Solid State Joining of a Cold Rolled Zr-Based Bulk Metallic Glass to a Wrought Aluminum Alloy by Power Ultrasonics

Becker

Kuball²,

Ghavimi

et al. 2022

Materials

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Ultrasonic metal welding (UMW) enables joining in the solid state at relative low temperatures with short cycle times. This technique is of particular interest for joining metallic glasses to each other or to other materials, because crystallization of the amorphous structure can be prevented due to the low thermal loading and the rapidity of the process. In this work, UMW is applied to join one 1 mm thick sheet of a commercial wrought aluminum alloy (AA5754) and one 0.4 mm thick strip of a commercial Zr-based bulk metallic glass (AMZ4). The introduced heat of the welding process is detected with thermocouples and thermal imaging. To investigate the strength of the joint and the influence on the microstructure, mechanical tensile tests are carried out in combination with scanning electron microscopy and differential scanning calorimetry. The results show that ultrasonic metal welding is a suitable technique to join amorphous bulk metallic glasses to crystalline aluminum alloys. The metallic glass component retains its amorphous structure in the joint, and the joint strength is higher than the strength of the Al sheet. These findings will help to develop future applications of BMG-based multi-material components, including medical tools.

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Section: Methodsmentioning

confidence: 99%

Solid State Joining of a Cold Rolled Zr-Based Bulk Metallic Glass to a Wrought Aluminum Alloy by Power Ultrasonics

Becker

Kuball²,

Ghavimi

et al. 2022

Materials

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“…A subsequent polarizer (2) ensures a constant polarization of the light inside the sensor. A half-wave plate (3) can be used to adjust the beam ratio of the two beam components (object beam and reference beam) split in the polarizing beam splitter cube (5). A priorly passed lens (4) collimates the light and provides an evenly illuminated measuring field of 12.5 × 12.5 mm² with a pixel sampling of 4.1 µm and a numerical aperture of ~0.06.…”

Section: Optical Designmentioning

confidence: 99%

“…For further information, please see 5,9 where the equivalent unfolded beam path has already been introduced in more detail.…”

Section: Optical Designmentioning

confidence: 99%

“…For objects with small axial dimensions, the HoloTop system has been developed at IPM in recent years, which for example can be used for 100% inline inspection of precision components (Figure 1a). The HoloCut system showed for the first time that holographic measurements can be realized even under very harsh environmental conditions such as in a machine tool [5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

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Digital holographic measurement system for use on multi-axis systems

Stevanovic

Seyler

Aslan

et al. 2021

Optical Measurement Systems for Industrial Inspection XII

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Hybrid manufacturing processes, high level of automation, short product service life and decreasing vertical range of manufacture in production request for increasing flexibility and speed of quality control. With HoloCut we previously introduced the world's first wireless digital-holographic sensor system prototype for fast and precise measurements inside a machine tool. With the experience gained so far, we now present an improved, even more compact sensor system, for the use on various multi-axis systems such as coordinate measuring machines (CMM), robots and machine tools and show first results with different handling systems.Besides improved mechanical stability, a size and weight reduction resulted from a new design approach: The arrangement of components around a central "core" made it possible to create a very compact design with a diameter of 125 mm, a height of ~180 mm and a weight of ~2 kg. The system features a 12.5 × 12.5 mm² measuring field with a lateral sampling of 4 μm. An NVIDIA Xavier embedded system enables pre-evaluations of the recorded measurement data in order to allow re-recording them, even before the complete data transmission (up to 160 MB with 2 Hz measuring rate) and evaluation. This is especially important for the use in vibration-prone environments such as multi-axis systems.Various handling systems such as a HERMLE C32U machine tool, an undamped LEITZ Reference HP 15.9.7 CMM and a UNIVERSAL ROBOT UR16e are examined with regard to vibrations.In future work, the behavior of the system under higher vibration amplitudes will be characterized.

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“…Die erfolgreiche Integration des digital-holographischen HoloTop-Sensors in eine Fertigungslinie für Präzisionsdrehteile zeigt die Eignung für die 100 %-Qualitätskontrolle bei einem Produktionstakt von einem Prüfling pro Sekunde. Jüngste Arbeiten zeigen sogar die Fähigkeit, holographische Sensorsysteme in Werkzeugmaschinen zu integrieren [3,5,6]. Der Prototyp HoloGear überträgt diese Erfahrungen nun auf die Verzahnungsmesstechnik und zeigt damit das enorme Potential für die Qualitätssicherung durch flächigenicht scannende -Messungen.…”

Section: Introductionunclassified

Flächige Zahnflankenprüfung mittels digitaler Holographie – optisch, schnell, präzise

Schiller¹,

Fratz²,

Seyler³

et al. 2021

Verzahnungsmesstechnik 2021

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KurzfassungDie Suche nach neuen Verzahnungsmessverfahren führt unweigerlich zu optischen Methoden: Diese Verfahren liefern hochpräzise Daten in kürzester Zeit und das nicht nur punktweise sondern flächig. Bisher scheitern optische Messungen in der Verzahnungsmessung jedoch an steilen Flanken und Mehrfachreflexionen. Wir zeigen am Beispiel eines prototypischen Systems wie diese Aspekte überwunden werden können, um Präzision und Geschwindigkeit in der Verzahnungsmessung zu kombinieren. Dabei wird die digitale Mehrwellenlängenholographie eingesetzt. Basierend auf dieser Technologie erfasst unser Inspektionssystem eine vollständige Zahnflanke in einer einzigen Aufnahme mit Millionen von 3D-Punkten und einer Genauigkeit von unter einem Mikrometer.

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Digital holography in production: an overview

Cited by 41 publications

References 27 publications

Solid State Joining of a Cold Rolled Zr-Based Bulk Metallic Glass to a Wrought Aluminum Alloy by Power Ultrasonics

Solid State Joining of a Cold Rolled Zr-Based Bulk Metallic Glass to a Wrought Aluminum Alloy by Power Ultrasonics

Digital holographic measurement system for use on multi-axis systems

Flächige Zahnflankenprüfung mittels digitaler Holographie – optisch, schnell, präzise

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