Micro-geometry Surface Modelling in the Process of Low-Rigidity Elastic-Deformable Shafts Turning

Świć, Antoni; Gola, Arkadiusz; Wołos, Dariusz; Opielak, Marek

doi:10.1007/s40997-016-0050-4

Cited by 21 publications

(18 citation statements)

References 23 publications

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“…artificial neural networks when the process is highly complicated and it is considerably difficult to apply suitable mathematical formulas [5,13]. Nevertheless, correct formulation of models requires detailed input data, which will provide an accurate description of an analysed process.…”

Section: Introductionmentioning

confidence: 99%

Effect of Technological Parameters on the Surface Roughness of Aluminium Alloys After Turning

Zagórski¹,

Warda²

2018

Adv. Sci. Technol. Res. J.

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The paper analyses the effect of technological parameters of turning (v c and f) on the 2D surface roughness parameters of aluminium alloys. Turning was carried out with SVJBL 2525 M11 shank tool, with VCGT 110302FN-25P insert, dedicated for machining light alloys. Three aluminium alloy types were examined in the study: 7075, 2024, 6082. The present study is focused on selected 2D surface texture parameters, and concludes that feed exerts considerable impact on the surface quality. Simultaneously, the findings of the study indicate that from the technological perspective the change of cutting speed v c does not impact the quality of the machined surface.

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Section: Introductionmentioning

confidence: 99%

Effect of Technological Parameters on the Surface Roughness of Aluminium Alloys After Turning

Zagórski¹,

Warda²

2018

Adv. Sci. Technol. Res. J.

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“…It is known that the transitional characteristic of such a link in time T 1E attains the value of 0,63g 0ust , where g 0ust -value of the input coordinate -elastic deformation of the machined part. At specific conditions of machining in the dynamic system, the time constant T 1 was calculated in accordance with the relations presented in [19]. The error can be calculated from the relation:…”

Section: Metodology Of Experimental Study and Experimental Worktationmentioning

confidence: 99%

“…The block of vibration recording, with the use of the PC, operates according to the following schematic. Deformations and vibrations of the dynamic system are recorded by the eddy current sensor 10, signal from which is supplied to the measuring generator 19 where it undergoes modulation and amplification. Amplified signal from the output of measuring generator 19 is supplied via special separator 20 to the input of the analogue-digital converter (PA/C) 17 PC and it is logged in digital form in the fixed memory of the computer.…”

Section: Metodology Of Experimental Study and Experimental Worktationmentioning

confidence: 99%

“…The problem of machining low-rigidity shafts was widely discussed in the literature. There are many publications concerning the problem of stability lobes [2÷23], definition of cutting conditions [4,18], machining forces and error prediction [16,17], surface quality modelling [1,7,11,19] or chatter suppression [15]. Moreover, the problem of simulation of low-rigidity part machining was in the special interests of researchers [5,9,15].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Typical Structures of Dynamic Systems of Machining of Elastic-Deformable Shafts With Low Rigidity

Świć¹,

Gola²,

Wołos³

2018

Adv. Sci. Technol. Res. J.

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In the process of machining of shafts with low rigidity it is difficult to achieve the required parameters of accuracy of form and dimensions and of surface quality. Under specific conditions, low inherent rigidity and the relatively low shaft rigidity, compared to the rigid assemblies of the machine tool, cause vibrations. The paper presents a 7-level hierarchical mathematical model of the system of longitudinal turning and a mathematical model of the dynamic system of machining of shafts with low rigidity in the elastic-deformable state, taking factors interfering with and destabilising the process of shaft machining into account. For the purpose of validation of the models, a study was conducted on the conformance of the dynamic characteristics of the mathematical model with the actual object. The study was realized on specially designed experimental workstation for the study of characteristics of the dynamic system of turning of elastic-deformable shafts with low rigidity. The experiment demonstrated a high conformance of the dynamic characteristics of the mathematical model with the actual object.

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“…Nowadays much of mechanical engineering industries apply critical non-rigid pieces (NRP) production increase of which is caused by blank and construction shape optimization, constant reduction of the produce steel intensity and constant increase of precise machines production. The problems of the NRP operating reliability increase is supposed to have significance verily at the moment [1][2][3][4][5][6][7][8][9]. The NRP processing has a few sides of fixes, such as significant resilient and residual deformation during all the stages, the technology system units low vibration resistance and admittance, irregular residual stress having place at all the stages.…”

Section: Introductionmentioning

confidence: 99%

Improving the accuracy of machining of non-rigid shaft

2018

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So far, due to much more strict events of operating parameters requirements, the reduction of pieces steel intensity allows to produce multiplying quantity of the highly precise Non-Rigid Pieces (NRP); most of them are supposed to be the shafts in amount. The creation of Automatic Control Systems (ACS) by mechanical operating also involves highly precise NRP production. In present paper there is Self-Centering Rest (SCR) operating hydrocylinder piston rod control system presented; it causes influence directly to the rest centering accuracy. The plant processing does not require hydrostation and pipeline; it possesses highly precise centering and it is able to function either in shaft support mode, or in active dampening one. There is the original scheme of double acting sealed hydrocylinder presented. There is the functional control scheme of hydraulic power cylinder presented. There are results of the non-rigid shaft axle research while turning presented. Thus, the beat reduction of the rigid shaft while turning in SCR system reaches 3...16 times in comparison.

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Micro-geometry Surface Modelling in the Process of Low-Rigidity Elastic-Deformable Shafts Turning

Cited by 21 publications

References 23 publications

Effect of Technological Parameters on the Surface Roughness of Aluminium Alloys After Turning

Effect of Technological Parameters on the Surface Roughness of Aluminium Alloys After Turning

Analysis of Typical Structures of Dynamic Systems of Machining of Elastic-Deformable Shafts With Low Rigidity

Improving the accuracy of machining of non-rigid shaft

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