Prof. Vladimir A. Grechishnikov Profile

Prof. Vladimir A. Grechishnikov

at Moscow State Univ of Technology "STANKIN"

SPIE Involvement:

Author

Publications (22)

Proceedings Article | 23 November 2024 Paper

A high-precision system for processing images of the physical model of the impeller obtained by the optical system in transmitted and reflected light

Petr Pivkin, Artem Ershov, Vladimir Grechishnikov, Mikhail Yu. Prus, Anton Yazev, Xiaohui Jiang, Luidmila Uvarova, Alexey Nadykto

Proceedings Volume 13239, 132391T (2024) https://doi.org/10.1117/12.3037620

KEYWORDS: Image processing, Cameras, Reflection, Optical surfaces, Image sharpness, Matrices, Photography, Control systems, Algorithm development, Interpolation

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Proceedings Article | 20 November 2024 Poster + Paper

A computer vision system for measuring the geometric parameters of helical surfaces obtained by multicoordinate grinding on CNC machines

Petr Pivkin, Anton Yazev, Vladimir Grechishnikov, Ekaterina Nazarenko, Elena Yu. Malysheva, Lyudmila Uvarova, Alexey Nadykto

Proceedings Volume 13241, 1324124 (2024) https://doi.org/10.1117/12.3037374

KEYWORDS: Image processing, Surface finishing, Image segmentation, Computing systems, Computer vision technology, Matrices, Abrasives, Control systems, Cameras

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Helical surfaces are important elements of solid end mills. Their production is carried out using multi-coordinate grinding. Shape errors and reduction in the quality of the screw surface appear due to abrasion, high pressure, and wear of the grinding wheel. Therefore, it is extremely important to measure geometric accuracy, to perform linear and angular measurements, and to study the properties of rake helical surfaces. The paper proposes improvements to monitoring of helical surfaces via the use of a new computer vision system for assessing microtexture on helical surfaces after multiaxis grinding on CNC machines. A computer vision system was developed to evaluate defects on helical surfaces after multi-coordinate grinding on CNC machines, and a comprehensive analysis of existing indicators for recognizing the defect was carried out in a guaranteed range of probability of finding a solution of 99.7% for the distribution density of grinds. To verify the developed method, the accuracy of surfaces obtained by using the one was compared with the measurements carried out using specialized equipment for the control of the accuracy of helical surfaces. A new system for monitoring the accuracy and defects of cutting edges, helical front and rear surfaces allows establishing the main geometric parameters of the cutting edges and cutting wedge such as flute angle and rake angle at the apex using key indicators of the difference in color intensity in the focal zone of the image. When developing this approach, it was found that areas with smaller curvature of the rake surface are more susceptible to the accumulation of helical flute pitch errors after grinding. Experimental studies of the system operation were conducted to provide empirical evidence on helical surfaces after multiaxis grinding on CNC machines, demonstrating excellent convergence and defect recognition accuracy. The accuracy of determining the results of the inclination angles of the microtexture surface after grinding at the control point is 2-2.5 degrees, which allows you to form a comprehensive solution for scanning the surface, which will allow you to apply a simple method of control using a camera in reflected light.

Proceedings Article | 18 June 2024 Poster + Paper

A new algorithm for recreating the technological process of high-speed multicoordinate processing based on improving key indicators of image recognition

Petr Pivkin, Artem Ershov, Vladimir Grechishnikov, Lyudmila Uvarova, Vladimir Kuznetsov, Anton Yazev, Michail Prus, Dazhong Wang, Xiaohui Jiang, Rao Yao, Alexey Nadykto

Proceedings Volume 12998, 129981Q (2024) https://doi.org/10.1117/12.3022523

KEYWORDS: Image processing, Profiling, Detection and tracking algorithms, Image filtering, Design, Control systems, Point clouds, Tunable filters, Resistance, Reflection

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Proceedings Article | 27 November 2023 Poster + Paper

Computer-aided design system for the end mill made by laser ablation and grinding

Petr Pivkin, Anton Yazev, Vladimir Grechishnikov, Artem Ershov, Ilya Minin, Alexander Zelensky, Elena Alenina, Xiaohui Jiang, Alexey Nadykto

Proceedings Volume 12762, 1276210 (2023) https://doi.org/10.1117/12.2690322

KEYWORDS: Design and modelling, Computer aided design, Kinematics, Laser cutting, Computing systems, Teeth, Thermal deformation, Materials processing, Manufacturing

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Proceedings Article | 27 November 2023 Poster + Paper

Computer-aided design system for a drill with an improved shape of the flunk surface

Petr Pivkin, Artem Ershov, Vladimir Grechishnikov, Inna Botryakova, Alexey Nadykto

Proceedings Volume 12762, 1276211 (2023) https://doi.org/10.1117/12.2691036

KEYWORDS: Laser drilling, Laser ablation, Computer aided design, Computing systems, Teeth, Kinematics, Design and modelling, Control systems

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Proceedings Article | 27 November 2023 Poster + Paper

An approach for recognizing surface defects in products with a complex helical shape

Petr Pivkin, Anton Yazev, Vladimir Grechishnikov, Artem Ershov, Ilya Minin, Alexander Zelensky, Elena Alenina, Xiaohui Jiang, Alexey Nadykto

Proceedings Volume 12767, 127671T (2023) https://doi.org/10.1117/12.2690093

KEYWORDS: Quality control, Manufacturing, Image analysis, Detection and tracking algorithms, Reflection, Inspection, Industry, Histograms, Diamond

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Proceedings Article | 27 November 2023 Poster + Paper

New indicators and standards for measuring of the end mill's helical groove by image processing

Petr Pivkin, Artem Ershov, Vladimir Grechishnikov, Vladimir Kuznetsov, Ekaterina Nazarenko, Elena Yu. Malysheva, Alexey Nadykto

Proceedings Volume 12769, 127691P (2023) https://doi.org/10.1117/12.2690091

KEYWORDS: Image processing, Standards development, Reflection, Optical surfaces, Optical metrology, Inspection

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