Cutting characteristics of electroplated diamond tools with laser-generated positive clearance

Warhanek, Maximilian; Walter, Christian; Huber, Sebastian; Hänni, F.; Wegener, Konrad

doi:10.1016/j.cirp.2015.04.010

Cited by 17 publications

(5 citation statements)

References 13 publications

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“…The conventionally dressed tools do not present rotation direction dependent processing forces but exhibit similar results to the LTD tools used in negative rotation direction, 5 % higher specific normal force and 10 % lower specific tangential force. The differences in processing forces due to the rotation direction was already described in [11], although the LTD exhibited much lower processing forces than conventionally dressed tools. The measurements of the specific normal and tangential grinding forces over the lifetime of the tools are plotted in Figure 5.…”

Section: Resultsmentioning

confidence: 81%

“…The dressing forces of such wheels were found to be significantly lower compared to conventional tools. Warhanek et al [11] demonstrated that the LTD process itself induces positive clearance on D 426 diamond grains which leads to an important reduction of processing forces compared to conventionally dressed tools when grinding vitrified corundum samples. In this paper the authors investigate the application of the aforementioned LTD process on CBN wheels for grinding hardened steel.…”

Section: State Of Researchmentioning

confidence: 98%

“…The whole circumference of each tool is measured, over a width of 1.4 mm, after each force measurement. An algorithm, as described in [11], is used to detect each abrasive grain. A plane is fitted on the top surface of the grain and the angle between the plane and the unrolled cylinder measured.…”

Section: Measurements and Analysismentioning

confidence: 99%

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Laser Touch Dressing of Electroplated CBN Grinding Tools

et al. 2016

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In this paper, an alternative process for dressing electroplated cBN grinding wheels using an ultrashort pulsed laser is presented. Other than abrasive grains dressed conventionally, laser touch dressed cBN grains exhibit cutting edges that have partially defined geometric elements with a positive clearance angle. Grinding experiments, including long-term tests, are performed on hardened steel, for a comparative study on the performances of laser dressed and conventionally dressed tools. While the processing forces are slightly higher for the laser touch dressed tools, the roughness of the ground surface is improved.

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Section: Resultsmentioning

confidence: 81%

Section: State Of Researchmentioning

confidence: 98%

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Laser Touch Dressing of Electroplated CBN Grinding Tools

et al. 2016

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“…Therefore, it has been an important research topic in the manufacturing field about how to achieve high-efficiency, high-precision and high-quality dressing of super-abrasive grinding wheels [2]. To achieve this goal, the most common methods used by researchers in recent years include mechanical dressing (MD) method [9][10][11], electrical discharge dressing (EDD) method [12][13][14], electrolytic in-process dressing (ELID) method [15] and Pulsed laser dressing (PLD) method [16]. However, the dressing mechanics, specifically the grain fracture evolution mechanism and brittle fracture mechanics, have not been addressed in a detailed fashion, which further restrict people's understanding about the influence of grain fracture on the accuracy, quality and efficiency of dressing [17].…”

Section: Introductionmentioning

confidence: 99%

Peridynamic Simulation to Fracture Mechanism of CBN Grain in the Honing Wheel Dressing Process

et al. 2021

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Regularly dressing of CBN honing wheel is an effective way to keep its sharpness and correct geometry during honing process. This study aims to understand the fracture mechanism of single CBN grain in the dressing process of honing wheel. The honing wheel dressing process was simplified into the dressing process of grinding wheel, and the bond-based Peridynamic method considering bond rotation effect was developed to investigate the progressive fracture evolution, stress characteristics, and fracture modes of CBN grains in this process. It was found that fracture evolution of CBN grains mainly underwent four stages: elastic deformation, damage initiation, crack formation, and macro fracture. In addition, the fracture initiation and propagation were mainly determined by the tensile and shear stress, where the former led to mode I fractures and the latter led to mode II fractures. The propagation of mode I fractures was stable while the propagation of mode II fracture was unstable. The results show that the Peridynamic approach has great potential to predict the fracture mechanism of CBN grain in the dressing process of honing and grinding wheels.

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“…A study by Warhanek et al (2015) pointed out the applicability of ultra-short pulsed laser processing with a laser touch dressing process. Combining fast deflection with a galvo scanner and slow rotation on a high-precision XY-table lead to accurate laser machining and positive clearance angles.…”

Section: Introductionmentioning

confidence: 99%

High-Precision Laser Conditioning of Diamond Grinding Wheels

Ackerl¹,

Warhanek²,

Gysel³

et al. 2019

Preprint

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A novel approach for machining of cylindrical hard materials and arbitrary shapes is presented. Diamond grinding tools with complex geometry are manufactured with picosecond orthogonal and quasi-tangential combined laser ablation. This rapid and flexible approach for small-scale production of master tools for industrial production trumps conventional approaches. Hitherto, the overall process time is faster compared to conventional technologies with the benefit of free standing diamond grains. A laser manufacturing chain achieving an ablation rate of 35mm3/min with a maximal geometric deviation of 3μm is presented. The meta-stable diamond structure persists and is assessed via Raman spectroscopy. The final grinding tools is sharpened by a radial laser process removing preferentially the metal-based binding material. This isolates the statistically distributed diamond grains from the binder. Hence, high-precision diamond grinding wheels with a mean error of smaller 1μm over the complete contour can be manufactured.

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Cutting characteristics of electroplated diamond tools with laser-generated positive clearance

Cited by 17 publications

References 13 publications

Laser Touch Dressing of Electroplated CBN Grinding Tools

Laser Touch Dressing of Electroplated CBN Grinding Tools

Peridynamic Simulation to Fracture Mechanism of CBN Grain in the Honing Wheel Dressing Process

High-Precision Laser Conditioning of Diamond Grinding Wheels

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