Dynamic Characterization of Ball Bearing in Turbine Propeller Using Bump Test Method

Pratiwi, Monika Audiya; Ikhsan, Muhammad; Octavianto, Rio Duzan; Hamid, Abdul; Subekti, Subekti

doi:10.22441/sinergi.2021.2.004

Cited by 9 publications

(7 citation statements)

References 21 publications

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“…When testing scrap machines for vibration, FRF measurements are employed [11]. The excitation force is provided by hammer blows and variations in cutting speed for variations in material given at three measurement positions (the X, Y, and Z axes) [12]. The measurement locations for tests carried out with and without oil are shown in Figure 3.…”

Section: Figure 2 Scrap Machinementioning

confidence: 99%

Material analysis of tool feed on scrap machines using the vibration method

Kharis Surnadi,

Subekti Subekti

2024

jttm

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Flexibility comes from the cutting force generated when the workpiece and tool react and are moved to different areas of the scrap machine. The chisel will get damaged as a result. The material and cutting speed that are used can cause damage. Given this, further studies employing the vibration method are required to determine the ways in which material affects the speed at which scrap is chopped. PVC, iron, and aluminum 5052 were the materials used in this investigation. The cutting rotational speeds varied from 32 to 80 m/min. To measure vibration, the accelerometer is positioned along the x, y, and z axes. The measurement outputs of the accelerometer are connected to the FFT Analyzer, which performs analysis using Matlab. When comparing cutting speeds above or below 50 m/min, the research results indicate that the x-axis has the largest amplitude and the most form variants. The most widely used material is PVC, which is followed by iron and aluminum. This is because, unlike aluminum and iron, which have microstructures in the form of crystal grains, PVC is a thermoplastic polymer with a microstructure made of chain molecules. Because all of the cutting energy is used in the frictional action between the chip and the workpiece when the tool is being used, the high frequency is the result. As a result, the friction on the sliding plane is breaking up atomic or molecular bonds. Additionally, the cutting force exerts a significant amount of pressure on the tool's wearing active surface

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Section: Figure 2 Scrap Machinementioning

confidence: 99%

Material analysis of tool feed on scrap machines using the vibration method

Kharis Surnadi,

Subekti Subekti

2024

jttm

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“…Selain itu, metoda FRF dapat mengetahui adanya keausan pada disc brake daihatsu sigra [7]. Menganalisis kerusakan tapper bearing dengan menggunakan metoda FRF [8] dan karakteristik getaran yang dimiliki oleh tappered roller bearing [9] serta ball bearing [10] sebelum dan sesudah pelumasan (oli & grease). Metoda FRF dilakukan untuk mengetahui adanya kerusakan pada sebuah stuktur [11].…”

Section: Pendahuluanunclassified

Karakteristik Dinamik Computer Numerical Control Milling Router 4 Axis

Saidiman¹,

Nugroho²,

Subekti³

et al. 2021

Sistemik

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Penelitian ini dilakukan untuk mengetahui karakteristik dinamik Computer Numerical Control Router 4 Axis dengan menggunakan metode Bump Test. Pengujian dilakukan dengan cara menempatkan sensor Accelerometer Khoctek 107b pada Mesin CNC Router 4 Axis pada sumbu x, y, z dikerangka atas, kerangka bawah, dan spindle. Hasil eksperimen pengujian getaran Mesin CNC dibagi kedalam dua proses pengujian yaitu kondisi normal dan kondisi rusak pada masing-masing sumbu. Diperoleh bahwa pengujian ini menghasilkan frekuensi global dimana frekuensi 8 Hz, 24 Hz, dan 40 Hz muncul disetiap sumbu x, y, dan z pada kerangka atas, kerangka bawah dan spindle. Pada mesin dengan kondisi rusak muncul frekuensi lokal pada sumbu y kerangka atas sebesar 5 Hz. Kemudian pada sumbu y spindle muncul frekuensi lokal sebesar 10 Hz, 56 Hz, dan 88 Hz. Munculnya frekuensi lokal menandakan adanya kerusakan pada CNC oleh sumbu tertentu selain frekuensi global.

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“…One of the best methods for tracking and determining engine conditions is the vibration method [5]. Vibration generally has a significant impact on machine performance and lowers maintenance costs [6].…”

Section: Introductionmentioning

confidence: 99%

Identification of ignition system coil damage on MPV 1000 CC vehicle using fast fourier transform

Andryas Saputra,

Subekti Subekti,

Erlangga Yorda Agustin

2023

jttm

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The coil is the main component of the vehicle in the ignition system. Therefore it is necessary to anticipate to maintain the performance of the coil so that it continues to function properly. One method that can be done is the vibration method. Vibration testing was carried out on a 1000 cc MPV vehicle with rotational variations of 800 rpm, 1500 rpm, 2500 rpm and 3500 rpm. Vibration testing is carried out using an accelerometer sensor connected to the FFT Analyzer to measure the vibration response, then an analysis is carried out using Matlab. From the research results obtained at the Y-axis point with a rotating speed of 1500 rpm the first shape mode appears at a frequency of 45 Hz with an amplitude of 1.357 mm/s2 under normal conditions. Whereas in abnormal conditions the first shape mode appears at a frequency of 41 Hz with an amplitude of 1,944 mm/s2. In abnormal conditions, damage due to bearing defects is obtained, this is due to the discovery of a frequency of 4x rpm at 1500 rpm rotation. Furthermore, at a rotational speed of 2500 rpm the measurement results on the engine show that the first shape mode appears at a frequency of 48 Hz with an amplitude of 2256 mm/s2 in normal coil conditions. Whereas in abnormal conditions the first shape mode appears with a frequency of 41 Hz with an amplitude of 4.176 mm/s2. The frequency at 82 Hz under abnormal conditions shown under normal conditions does not appear. This shows the occurrence of losses, because it occurs at 2x rpm at 2500 rpm rotation

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Dynamic Characterization of Ball Bearing in Turbine Propeller Using Bump Test Method

Cited by 9 publications

References 21 publications

Material analysis of tool feed on scrap machines using the vibration method

Material analysis of tool feed on scrap machines using the vibration method

Karakteristik Dinamik Computer Numerical Control Milling Router 4 Axis

Identification of ignition system coil damage on MPV 1000 CC vehicle using fast fourier transform

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