Technological Methods for Controlling the Elastic-Deformable State in Turning and Grinding Shafts of Low Stiffness

Świć, Antoni; Gola, Arkadiusz; Orynycz, Olga; Tucki, Karol; Matijošius, Jonas

doi:10.3390/ma15155265

Cited by 2 publications

(4 citation statements)

References 39 publications

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“…Based on the direct measurement of vibration acceleration, it is possible to indirectly determine, for instance, the mechanical energy transferred to the human body. Similar acceleration calculations allowing the determination of mechanical and energy parameters are carried out in many fields of science [40][41][42][43].…”

Section: Wamentioning

confidence: 99%

Investigating the Impact of Carbon Fiber as a Wheelchair Frame Material on Its Ability to Dissipate Kinetic Energy and Reduce Vibrations

Wieczorek,

Warguła,

Adamiec

et al. 2024

Materials

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Using a wheelchair over uneven terrain generates vibrations of the human body. These vibrations result from mechanical energy impulses transferred from the ground through the wheelchair components to the user’s body, which may negatively affect the quality of the wheelchair use and the user’s health. This energy can be dissipated through the structure of the wheelchair frame, such as polymer and carbon fiber composites. This article aims to compare a wheelchair with an aluminum alloy frame and a carbon fiber frame in terms of reducing kinematic excitation acting on the user’s body. Three wheelchairs were used in the study, one with an aluminum alloy frame (reference) and two innovative ones with composite frames. The user was sitting in the tested wheelchairs and had an accelerometer attached to their forehead. The vibrations were generated by applying impulses to the rear wheels of the wheelchair. The obtained results were analyzed and compared, especially regarding differences in the damping decrement. The research shows that using modern materials in the wheelchair frame has a beneficial effect on vibration damping. Although the frame structure and material did not significantly impact the reduction in the acceleration vector, the material and geometry had a beneficial effect on the short dissipation time of the mechanical energy generated by the kinematic excitation. Research has shown that modern construction materials, especially carbon fiber-reinforced composites, may be an alternative to traditional wheelchair suspension modules, effectively damping vibrations.

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Section: Wamentioning

confidence: 99%

Investigating the Impact of Carbon Fiber as a Wheelchair Frame Material on Its Ability to Dissipate Kinetic Energy and Reduce Vibrations

Wieczorek,

Warguła,

Adamiec

et al. 2024

Materials

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“… Relative compliance of elastic technological systems depending on the length of machining ϖ ε = f(ε) [ 10 ]. …”

Section: Figurementioning

confidence: 99%

“… Block diagram of the measurement and compensation system of bending vibrations during grinding [ 10 ]. …”

Section: Figurementioning

confidence: 99%

“…Rotationally symmetrical parts (shafts, turbine rotors, pumps, lead screws, etc.) account for about 34% of all parts used in the engineering industry, of which 12% are classified as low-stiffness parts [ 7 , 8 , 9 , 10 ]. Such parts are characterized by disproportionate overall dimensions and low stiffness in specific directions and sections [ 5 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

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Influence of the Compliance of a Technological System on the Machining Accuracy of Low-Stiffness Shafts in the Grinding Process

Świć

Gola

2023

Materials

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This paper reports the results of research on the influence of the compliance of the technological system used in grinding low-stiffness shafts on the shape accuracy of the workpieces. The level of accuracy achieved using passive compliance compensation was assessed, and technological assumptions were formulated to further increase the shape accuracy of the low-stiffness shafts obtained in the grinding process. Taking into account the limitations of passive compliance compensation, a method for the active compensation of the compliance of the elastic technological system during the machining process was developed. The experiments showed that the accuracy of grinding was most effectively increased by adjusting the compliance and controlling the bending moments, depending on the position of the cutting force (grinding wheel) along the part. The experimental results were largely consistent with the results of the theoretical study and confirmed the assumptions made. Adjusting the compliance in the proposed way allows for the significant improvement in the accuracy and productivity of machining of low-stiffness shafts.

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Technological Methods for Controlling the Elastic-Deformable State in Turning and Grinding Shafts of Low Stiffness

Cited by 2 publications

References 39 publications

Investigating the Impact of Carbon Fiber as a Wheelchair Frame Material on Its Ability to Dissipate Kinetic Energy and Reduce Vibrations

Investigating the Impact of Carbon Fiber as a Wheelchair Frame Material on Its Ability to Dissipate Kinetic Energy and Reduce Vibrations

Influence of the Compliance of a Technological System on the Machining Accuracy of Low-Stiffness Shafts in the Grinding Process

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