Fuzzy Controllers in the Adaptive Control System of a CNC Lathe

Proskuryakov, N. A.; Nekrasov, R.Yu.; Starikov, Alexander; Solov’ev, I. V.; Barbyshev, Boris V.; Tempel, Yu.A.

doi:10.3103/s1068798x18030188

Cited by 11 publications

(2 citation statements)

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“…Thus, we can conclude that the spectrogram does not allow us to fully assess the changes that occur in the technological system when the tool is worn out. In [11][12][13][14], intelligent systems are used for recognizing acoustic signal parameters. However, on the one hand, the apparatus of Markov processes and neural networks based on Kohonen maps requires significant and long calculations, which is not applicable in practice to solve the problem of providing output parameters of the processing process.…”

Section: Figure 1 Two-peak Signal Spectermentioning

confidence: 99%

On the issue of automatic form accuracy during processing on CNC machines

Ovsyannikov

Nekrasov

Putilova

et al. 2020

redin

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This work aims to develop technical solutions that allow providing the specified parameters of the accuracy of the shape of parts in the cross-section during processing on a CNC machine. Experimental studies were performed on a screw-cutting lathe. An acoustic signal in the range from 6 to 12 kHz was used as a diagnostic sign to assess the wear of the cutting tool, since during preliminary studies, it was found that this range is most sensitive to changes in processing modes. Studies were performed at different values of wear of the cutting tool (estimated by the width of the wear chamfer). For estimating the life of a cutting tool, a neuro-fuzzy model has been developed. Using models of this class allows adjusting to specific conditions (machine, tool), and correctly evaluating the tool life. The model error for the test sample does not exceed 10%. The test results showed that using the proposed solutions makes it possible to increase the accuracy of the manufacturing of shut-off valve parts by 20-30%.

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Section: Figure 1 Two-peak Signal Spectermentioning

confidence: 99%

On the issue of automatic form accuracy during processing on CNC machines

Ovsyannikov

Nekrasov

Putilova

et al. 2020

redin

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“…When profile milling of peripheral segments per one working pass of the cutting tool the allowance with thickness measured in tens of millimeters is removed, which causes a decrease in static and centrifugal moments of the cross section inertia of the original piece, the moment of resistance, and, consequently, rigidity and geometric accuracy of the machined surface. An important resource for improving the quality of products is the use of high-tech complex systems [51][52][53][54][55], as well as high-performance automated machines and computer systems [56][57][58][59][60][61]. Nowadays, there are no mathematical models of elastic displacements and flexural rigidity of extended workpieces with unstable dimensional, physical and mechanical characteristics [62][63][64][65], which makes it impossible to carry out design calculations and to obtain reliable results, on the basis of which it would be possible to develop effective milling processes for profile surfaces.…”

Section: Introductionmentioning

confidence: 99%

The Processing of the Profile Surface of the Work-Pieces, Characterized by Low Rigidity

Фомин

Гусев

Тимербаев

2020

SSP

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This work indicates that the prediction of the geometric indicators of the quality of the machined surface in the design of technological operations for milling a profile surface of work-pieces with low rigidity is possible, on the basis of an analysis of the elastic displacements of the technological system elements, the flexural rigidity of the work-piece as a function of its initial dimensions, the locating chart and the physical and mechanical characteristics of the material being processed. The article describes the characteristics of the elements of the technological system for the profile milling of work-pieces of low rigidity; The analytical dependencies linking the elastic displacements of the work-piece during the processing of various wood species with elements of the milling mode and the design parameters of the mill are given. Extreme total elastic displacements of the technological system during the cutting process are determined. Mathematical models of the maximum geometric error of the machined surface, as a function of the work-piece's flexural rigidity and the spindle unit, are established. Based on the results of the analysis, recommendations for improving the accuracy of the product were developed.

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