Investigation of Processes in High-Speed Equipment Using CNC Capabilities

Aksonov, Yevhen; Kombarov, Volodymyr; Fojtu, O.; Sorokin, V. K.; Kryzhyvets, Ye.

doi:10.17973/mmsj.2019_11_2019081

Cited by 18 publications

(11 citation statements)

References 4 publications

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“…The resolution of the internal encoder of the servomotor is 1 Z = 2500 discrete/rev and the external encoder is 2 Z = 3000 discrete/rev. Servomotor control, registration, and processing of experimental data is carried out using a software and hardware complex (SHC) [15,16].…”

Section: Qualitative Characteristics Of Measuring Encodersmentioning

confidence: 99%

Investigation of the Portal-Type Machine Tool Gear-Belt Gearbox

2022

IJOMAM

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Many modern technological processes are implemented at high speeds of the machine tool operating bodies relative to the workpieces. With significant dimensions of the processed parts, rack-and-gear drives are used. The design features of the rack-and-gear drive require coordination of the servo drive with the machine operating bodies movement speeds using a gearbox. This paper considers the possibility of creating a gear-belt gearbox for drives of highspeed equipment. The applied gearbox should not cause additional errors in the movement process. The work carried out experimental investigations of a servomotor dynamic characteristics and the qualitative characteristics of measuring encoders, the gearbox influence on the displacement error, machine tool axis movement. The dynamic characteristics of a servomotor without load, assembled with a gearbox and as part of a controlled axis of a portal-type machine have been investigated. It is determined that the delay time of the movement start is no more than 0.002 s for a servomotor without load and as part of a gearbox, and the delay time of the movement start of the gearbox output shaft does not exceed 0.003 s. It has been determined that the maximum possible acceleration of the controlled bodies of the machine during using the considered drive is 8 m/s 2 . The dynamic error of the axis movement along a straight trajectory does not exceed 0.023 mm, and along a circular trajectory -0.035 mm. The error of position determining for the operating body is no more than ±1 discrete. This indicates that the gearbox error is less than the error of the position measurement system used in the investigated machine.

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Section: Qualitative Characteristics Of Measuring Encodersmentioning

confidence: 99%

Investigation of the Portal-Type Machine Tool Gear-Belt Gearbox

2022

IJOMAM

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“…In Fig. 11, shown the schedule of giving contour F(t) variation fixed in CNC system is resulted [33] in the process of executing the control program on the upgraded machine FP7SMN2. The contour feed scheduling subsystem performed the formation of the contour feed variation plan, according to which the processing of frames N2, N3, N4, N5 is performed on the feed, which is less than specified in the control program.…”

Section: Figure 10: the Machining Path Of The Stringer Sectionmentioning

confidence: 99%

“…To coordinate the modes of operation of the spindle in the two-level CNC system [33] developed functions G786, G787, which ensure the maintenance of the allowable feed to the tooth while deceleration the contour feed.…”

Section: Figure 12: Variation Of Machining Parameters: (A) -Variation Of Spindle Speed Along a Trajectory; (B) -Variation Of Feed To The mentioning

confidence: 99%

Numerical Control of Machining Parts From Aluminum Alloys With Sticking Minimization

2021

IJOMAM

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To implement a lot of technological processes in the manufacturing of aircraft parts from aluminum alloys, it is necessary to move the tool at a high speed. High requirements for accuracy and manufacturing quality aircraft parts are provided with application of CNC systems with adaptive control algorithms, in which due the mutual influence of the process parameters provided by the parameters of quality and accuracy. Among a number of factors adversely affecting the quality of high speed machining of aluminum alloys in the paper questions influence Lookahead system distortion predetermined (set up) cutting parameters on the formation conditions of the sticking material to the tool. The paper deals with high-speed machining without the use of a cooling lubricant (coolant). The paper provides a qualitative description of the heat generation variation in the cutting zone. It is concluded that it is necessary to cutting speed variation when feed variating. An experimental investigation of the cutting parameters for the appearance of the effect of the processed material sticking on the tool for alloy 1933 has been carried out. Areas of an unfavorable (negative) combination of parameters leading to the sticking of the material to the tool have been identified. The method of cutting modes adaptation to contour feed rate variation on curvilinear areas of a processing trajectory is proposed. The analysis of variation in cutting parameters with the partial deceleration of the spindle simultaneously with the deceleration of feed when moving along the path is carried out. The possibility of excluding the sticking of the processed material to the tool when variation the rotation speed by 20…30% is shown. The proposed method is implemented in the CNC system and used for manufacturing of "Antonov" company airplane parts.

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“…The use of feedforward control methods with speed and higher-order differential characteristics requires a corresponding resolution of control parameter [22][23][24][25]. Resolution should provide the calculating motion characteristics without any distortion.…”

Section: Distortion Of the Controlled Axes Motion Differential Kinematic Characteristics In A Discrete Representation Of The Cnc System Pmentioning

confidence: 99%

“…In number of papers [22][23][24][25] it was shown that the use of feedforward control taking into account the motion differential characteristics significantly increase the accuracy of movement along the tool path.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Required Discreteness of Interpolation Movement Parameters in Cyber-physical Systems

Kombarov

Tsegelnyk

Plankovskyy

et al. 2021

Period. Polytech. Mech. Eng.

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Improving the accuracy, reliability, and performance of cyber-physical systems such as high-speed machining, laser cutting, welding and cladding etc. is one of the most pressing challenges in modern industry. CNC system carries out data processing and significantly affect on accuracy of operation such equipment. The paper considers the problem of controlled axes motion differential characteristics data processing in the internal representation of the discrete space of the CNC system. Equations for determining the required discreteness of the differential characteristics position and resolution, such as the speed, acceleration, and jerk are proposed. For the most widely used CNC equipment specific discreteness and resolution values have been determined.

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Investigation of Processes in High-Speed Equipment Using CNC Capabilities

Cited by 18 publications

References 4 publications

Investigation of the Portal-Type Machine Tool Gear-Belt Gearbox

Investigation of the Portal-Type Machine Tool Gear-Belt Gearbox

Numerical Control of Machining Parts From Aluminum Alloys With Sticking Minimization

Investigation of the Required Discreteness of Interpolation Movement Parameters in Cyber-physical Systems

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