Evaluation of Vibration Parameters under Machining

Panda, Anton; Prislupčák, Marek; Jurko, Jozef; Krenický, Tibor; Jančík, Marek

doi:10.4028/www.scientific.net/kem.669.228

Cited by 3 publications

(2 citation statements)

References 27 publications

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“…The proposed alternatives of changes of the experimental actuator differ from the original involvement diagram. The main differences are in elements allowing a continuous pressure change [24][25][26].…”

Section: Evaluation Of the Results Of Experiments And Proposed Modifimentioning

confidence: 99%

Analysis of Step Responses in Nonlinear Dynamic Systems Consisting of Antagonistic Involvement of Pneumatic Artificial Muscles

Rimár

Šmeringai

Fedak

et al. 2017

Advances in Materials Science and Engineering

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The paper describes a set of experimental measurements carried out on the experimental equipment with a drive based on pneumatic artificial muscles. Based on the analysis of the PAMS control systems issue in relation to the issue of a position control, a control algorithm has been designed and verified. The requirements of the control systems do not arise only from the condition of the desired positioning point rapid achievement, but also from the subsequent dynamics and accuracy repeatability. This algorithm enables an efficient way of stabilization of the actuator position in various dynamic conditions during the operation. It allows eliminating undesirable vibrations oscillating around the point of the required position and dampening them appropriately. The article describes a set of performed verification experimental measurements confirming the applicability in relation to the system that controls the position of the actuator utilizing the described algorithm. The algorithm application enables a positive influencing and optimization of the actuator positioning accuracy and a full-valued automation of its operation.

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Section: Evaluation Of the Results Of Experiments And Proposed Modifimentioning

confidence: 99%

Analysis of Step Responses in Nonlinear Dynamic Systems Consisting of Antagonistic Involvement of Pneumatic Artificial Muscles

Rimár

Šmeringai

Fedak

et al. 2017

Advances in Materials Science and Engineering

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“…The productivity requirement means large material removal rates, which induces large bites of material and increased rates of motion [4,5]. In order to increase speed, acceleration has to be increased, which needs lighter design of machine tool structures withstanding less excitation force with no vibrations [6,7]. Geometrical accuracy of metal cutting operations depends on the reflected static stiffness of the entire machine at the tip of the tool.…”

Section: Introductionmentioning

confidence: 99%

Measuring the Size of Vibrations on a Mill Using the Vibration Analysis

Olejárová

Krenický

2017

KEM

Self Cite

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When processing materials using the milling technology, regenerative fluctuations of vibrations are the decisive factors, which limit productivity. In some case the size of the vibrations can cause shortened lifespan of the tool, decrease reliability and operational condition of the device, and subsequently case poor quality of the processed surface. Predicting the size of the vibrations between the milling machine and the work-piece is important as a lead for the users of the tool to select optimum depth of the cut and turning of the spindle, which leads to maximum rate of splinter removal. The extent of the research is focused especially on the process of monitoring, with the goal to analyze the size of the vibration at three places determined in advance - spindle head, work-piece and support, where rotation speed of the spindle change during the processing, as well as rate of splinter removal. By evaluating the results of experimental research, it is possible to determine adequate rotation speed of the spindle and depth of the cut, to achieve longest lifespan of the machine.

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Optimal cutting parameter specification of newly designed milling tools based on the frequency monitoring

Monka

Monková

Majstorovic

et al. 2020

Int J Adv Manuf Technol

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The article deals with the specification of the most suitable machining parameters for three newly designed end mills in the term of stability of the deep groove machining, at which the depth of cut is minimally twice higher the diameter of the cutter. Online vibration analysis was selected as a tool for goal achievement. The partial objective of the first phase of experimental research was to set the boundary conditions of vibrodiagnostics at the specification of the behaviour of three commercially produced milling cutters when the results were compared with the surface roughness achieved at the machining with individual cutting parameters. Vibrodiagnostic conditions were subsequently applied in the second phase of the experiment to determine the most suitable machining parameters of newly designed milling cutters. The Pinnacle VMC 650 CNC machining centre with Fanuc control system was used to perform the experiments. The material of cutters was S-grade sintered carbide, and all the designed cutters were PVD coated with the same AlTiN (aluminium titanium nitride) coating. The machined material was 16MnCr5 (1.7131) steel. The surface roughness analysis after machining by newly designed cutters pointed out that they are better as for the surface quality in comparison with the commercially produced end mills. Finally, it was possible to state that the four-tooth cutter 01-FVT with helix angles (β1= 39° and β2 = 41°) and tooth pitch (τ1 = 83° and τ2 = 97°) seems to be the best tool for milling deepshaped grooves among all the tested milling cutters.

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Evaluation of Vibration Parameters under Machining

Cited by 3 publications

References 27 publications

Analysis of Step Responses in Nonlinear Dynamic Systems Consisting of Antagonistic Involvement of Pneumatic Artificial Muscles

Analysis of Step Responses in Nonlinear Dynamic Systems Consisting of Antagonistic Involvement of Pneumatic Artificial Muscles

Measuring the Size of Vibrations on a Mill Using the Vibration Analysis

Optimal cutting parameter specification of newly designed milling tools based on the frequency monitoring

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