Contribution on modelling the remote ablation cutting

Musiol, Jan; Zaeh, Michael F.; Guertler, Matthias R.

doi:10.2351/1.5062260

Cited by 6 publications

(6 citation statements)

References 8 publications

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“…Besides the minor ejection in cutting direction (forward), a major amount of the material ascends along the side wall to the edge of the kerf and leaves the part as spatters in sideward and reverse direction. Flow striations on the cut surface, caused by erosion of the hot melt, as well as high speed images of the leaving spatters confirm these ejection paths [12].…”

Section: Process Modellingmentioning

confidence: 92%

“…With the idea of the front wall shape, it is now possible to model the process zone. Assuming the front wall as a shape with cubic function, the intensity distribution of the beam as Gaussian and calculating the focus position as shown in [12], the result is illustrated on the left hand side of Figure 4. The drawing shows a longitudinal cross-section along the kerf with the front wall and the applied laser beam.…”

Section: Process Modellingmentioning

confidence: 99%

“…3D-isometric view of the cutting kerf with one and two scans and the intermediate step (v s = 8 m/s; P L = 3 kW) (left)[12] and high speed camera image of the processing zone in top view during cutting with front wall and burr forming (v s = 1 m/s; P L = 3 kW; n = 1; d f = 0.05 mm) (right)…”

mentioning

confidence: 99%

“…Model of the kerf front wall, irradiated with a Gaussian beam (left) and model of the kerf with ejection paths (right)[12] …”

mentioning

confidence: 99%

See 3 more Smart Citations

Combining remote ablation cutting and remote welding: opportunities and application areas

Musiol¹,

Luetke²,

Schweier³

et al. 2012

High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications

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Remote Ablation Cutting (RAC) is a most promising process for cutting thin metal sheets in the automotive, medical and consumer industry. Characteristically for the RAC are high cutting velocities for metal foils as well as material processing of box structures without spatter contamination at the inner surface. Furthermore, the system technology for RAC can also be used for other processes, like welding and marking. Thereby, the flexibility of a production unit is increased, compared to a conventional cutting system. Despite several advantages, the RAC is not yet state of the art in industrial production. Reasons for that are lacking knowledge in the area of process itself and in possible application areas.In this paper a conceptual model of the ablation and the ejection mechanism is presented. It consists of the laser beam absorption within the processing zone, the melt ejection from the kerf and the resulting spatter formation above the part surface. Besides the model, the process boundaries and limitations are identified using empirical data.Addressing possible applications, the following samples of different industrial areas are introduced to show the potential of the process: Cutting of heat exchanger plates, cylinder head seals, and cathode/anode material for Li-Ion-Batteries. Furthermore, a concept and first results of the combined processing of remote cutting and welding with one laser and one scanner optics are presented.

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Section: Process Modellingmentioning

confidence: 92%

Section: Process Modellingmentioning

confidence: 99%

mentioning

confidence: 99%

“…Model of the kerf front wall, irradiated with a Gaussian beam (left) and model of the kerf with ejection paths (right)[12] …”

mentioning

confidence: 99%

See 2 more Smart Citations

Combining remote ablation cutting and remote welding: opportunities and application areas

Musiol¹,

Luetke²,

Schweier³

et al. 2012

High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications

Self Cite

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“…This effect can be explained by the pressure that is exerted on the melt by the vaporized material of the keyhole front wall [4,7]. Therefore, it is a common approach to scale up the processing speed if a certain loss of mass [8] or a resulting cut kerf is to be achieved [9] by means of spatter formation.…”

Section: Introductionmentioning

confidence: 99%

Investigations of the Absorption Front in High-Speed Laser Processing Up to 600 m/min

2021

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High processing speeds enormously enlarge the number of possible fields of application for laser processes. For example, material removal for sheet cutting using multiple passes or precise mass corrections can be achieved by means of spatter formation. For a better understanding of spatter formation at processing speeds of several hundred meters per minute, characterizations of the processing zone are required. For this purpose, a 400 W single-mode fiber laser was used in this study to process stainless steel AISI 304 (1.4301/X5CrNi18‑10) with speeds of up to 600 m/min. A setup was developed that enabled a lateral high-speed observation of the processing zone by means of a glass plate flanking. This approach allowed for the measurement of several dimensions, such as the penetration depth, spatter formation, and especially, the inclination angle of the absorption front. It was shown that the loss of mass started to significantly increase when the absorption front was inclined at about 60°. In combination with precise weighings, metallographic examinations, and further external process observations, these findings provided an illustration of four empirical process models for different processing speeds.

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