Measurement of a tool wear profile using confocal fluorescence microscopy of the cutting fluid layer

Takaya, Yasuhiro; Maruno, Kenji; Michihata, Masaki; Mizutani, Yasuhiro

doi:10.1016/j.cirp.2016.04.014

Cited by 24 publications

(12 citation statements)

References 18 publications

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“…As shown in Fig. 24, Takaya et al have demonstrated the possibility of using a fluorescent confocal microscope to measure the surface of a tool covered with a cutting fluid layer based on sensing fluorescent emission from the cutting fluid excitation by focused laser light [221]. The method has been applied to measure submerged metallic micro-workpieces [167].…”

Section: Noncontact-type Probesmentioning

confidence: 99%

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On-machine and in-process surface metrology for precision manufacturing

et al. 2019

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On-machine and in-process surface metrology are important for quality control in manufacturing of precision surfaces. The classifications, requirements and tasks of on-machine and in-process surface metrology are addressed. The state-of-the-art on-machine and in-process measurement systems and sensor technologies are presented. Error separation algorithms for removing machine tool errors, which is specially required in on-machine and in-process surface metrology, are overviewed, followed by a discussion on calibration and traceability. Advanced techniques on sampling strategies, measurement systems-machine tools interface, data flow and analysis as well as feedbacks for compensation manufacturing are then demonstrated. Future challenges and developing trends are also discussed.

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Section: Noncontact-type Probesmentioning

confidence: 99%

“…confocal probe for measurement of a tool's surface covered with a cutting fluid layer based on sensing fluorescent emission[221].…”

mentioning

confidence: 99%

On-machine and in-process surface metrology for precision manufacturing

et al. 2019

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“…In contrast, an indirect measurement of the removal geometry using confocal fluorescence microscopy is not subject to these impairments. The method has already been successfully applied close to the process in manufacturing environments with fluid layers as thin as 120 μm [6] and in-situ in fluid layers several millimeters thick [7]. However, to date, no near-process application of the indirect measurement approach has been performed in the LCM process environment.…”

Section: Introductionmentioning

confidence: 99%

Near-process indirect surface characterization of laser-chemically produced removal contours

2022

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The manufacturing rate of laser chemical machining (LCM) is currently restricted to avoid disruptive boiling bubbles in the process fluid. An increase necessitates adjustments to the laser beam or fluid properties. However, the current understanding of the surface removal mechanisms is insufficient to achieve a consistent removal quality under these conditions. For an improved process modeling, in-process measurements of the surface geometry, the surface temperature and the boiling bubbles are required. Due to the complex process environment, no suitable in-process measurement technique for the geometry or surface temperature exists. This contribution presents an indirect geometry measurement approach based on confocal fluorescence microscopy that offers the potential for near-process application in the LCM process environment. As a result, the micro-geometry of different surfaces is shown to be indirectly measurable under LCM-equivalent process conditions such as thick fluid layers or gas bubbles in the beam path. Furthermore, a combined fluorescence-based measurement of geometry and temperature is proposed.

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“…Method is validated by destructive cut of the mill and successive measurement on a scanning electron microscope. Takaya et al [30,31], noting that tools are usually cover with cutting fluid during machining, proposed the use of fluorescence confocal microscopy for scanning profiles of tools directly on-machine. Although the measuring system should be capable of performing 3D measurement, it is applied only for the measurement of 2D profiles.…”

Section: Introductionmentioning

confidence: 99%

3D Identification of Face and Flank in Micro-mills for Automatic Measurement of Rake Angle

Petrò

Moroni

2020

Nanomanuf Metrol

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In an Industry 4.0 context, to each object a "digital twin" is associated, which is a virtual counterpart of the object itself. In the case of a tool this includes, together with its material and manufacturing information, its solid geometry. Tool geometry knowledge is fundamental to enable effective tool management, manufacturing verification, and tooling simulation. If for tool management, the conventional 2D presetting is sufficient, tooling simulation and tool manufacturing verification require a complete 3D characterization. This is particularly true in the case of the microtools: the process of micro-chip formation is still a research subject.Although the 3D geometry of tool is well established in the ISO 3002 series of standard, only recently 3D measurement of tools has been made possible by new measuring systems. Still, tool geometry verification requires a lot of human intervention.This paper aims at setting the base for the automatic analysis point mesh scanned on the whole surface of tools, and in particular microtools.The first step for doing this is the identification of the active surfaces of the tool, that is the face and the flank plus the cutting edge. The identification of these geometric features is in general possible thanks to their specific characteristics: in particular, the cutting edge is characterized by a high curvature, and it separates the face from the flank. This paper considers cylindrical micro end-mills as a first example of an approach that can be extended to in principle any kind of tool. The cylindrical helix characterizing the cutting edge is the key geometry to be considered in the development of the specific method. Once the tool features (face, flank, and cutting edge) have been separated, of the tool angles, for instance, can be estimated. As first angle to study, the rake angle has been selected. The approach will be validated on simulated data and on real scans of micro-tools.

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Measurement of a tool wear profile using confocal fluorescence microscopy of the cutting fluid layer

Cited by 24 publications

References 18 publications

On-machine and in-process surface metrology for precision manufacturing

On-machine and in-process surface metrology for precision manufacturing

Near-process indirect surface characterization of laser-chemically produced removal contours

3D Identification of Face and Flank in Micro-mills for Automatic Measurement of Rake Angle

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