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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Proksima Prosiding SNTTM
Cupu, Dedi Rosa Putra
Universitas Riau
Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Analisis Kerusakan Spherical Bearing Pada Roller Grinding Atox Mill K1m01 Di Area Coal Mill PT. Semen Baturaja I (Persero) Tbk Indonesia Agus, Muhammad Jepri; Syafri, Syafri; Cupu, Dedi Rosa Putra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Roller Grinding at Atox Coal Mill is equipment used to refine coal (raw coal). In the atox mill have three roller grinding. The movement of the roller grinding comes from the table's movement under the grinding roller. The lubrication system on the roller grinding is rated on the outside lubrication system.Roller grinding in atox vertical mill is a device that used a large bearing type of heavy duty. The method on spherical damage analysis used the data that exists in the field and data theoretically calculations so the purpose of this calculation is to find out the age bearing with the type of damage occurring on bearing, and to know the age of bearing SKF 23068 CAC on roller three grinding atox mill with a bearing speed on the bearing age, that the speed of bearing screening affects the thickness of a film layer. The faster of sphere, the thinner layer film is resulting.. Keywords: Roller grinding, caol mill, bearings
Kaji Numerik Pengaruh Beban Awal, Kecepatan Permukaan Dan Radius Bearing Terhadap Ketebalan Lapisan Film Dan Tekanan Elastohydrodynamic Pada Cylindrical Roller Bearing Menggunakan Metode Beda Hingga Zulfikar, Zeta; Cupu, Dedi Rosa Putra; Nazaruddin, Nazaruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Contact between the roller element with the inner or outer ring produces enormous pressure which can cause friction between the surfaces of the two objects. The continuous friction will result in wear and using lubricant between the two contacting surfaces becomes an important role to reduce friction as well as wear. There are several types of lubrication, one of them is elastohydrodinamic lubrication. In this study the numerical method of Finite Difference Method is used to solve Reynolds equation in order to investigate the effect of basic parameters such as initial load, surface speed and radius of the cylindrical roller bearing. A single contact of cylinder roller and inner ring is modeled as a contact between a solid cylinder and flat plate. The influence of temperature, non-newtonian fluids and dynamic loads are ignored in this research. Central-difference scheme in the Finite Element Method is used to solve the Reynolds equation for calculating the elastohydrodynamic pressure that occurs on a contact. The results obtained show that there is an influence of the initial load, velocity and also the radius of the pressure generated at the time of contact between the solid cylindrical bearing element and the thickness of the film layer formed between the two surfaces of the object. The greater load given will increase the maximum pressure, but reduce the minimum film thickness. While when given variations in velocity, increasing the minimum value of film thickness and reduce the maximum pressure. Likewise what happens when variations in radius are given, increasing the minimum value of film thickness and reducing the value of maximum pressure. Keywords: Elastohydrodynamic Lubrication, Film Thickness, Elastohydrodynamic Pressure, Finite Element Method
Kaji Numerik Pengaruh Beban Dinamik Terhadap Tekanan Dan Ketebalan Lapisan Film Pada Cylindrical Roller Bearing Menggunakan Metode Beda Hingga Putra, Afriadham; Cupu, Dedi Rosa Putra; Nazaruddin, Nazaruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Roller bearings are one type of bearing (cylindrical) that uses a roll or cylindrical shape as a friction damper on the bearing. The biggest factor influencing the performance of roller bearings is the dynamic load. One source of dynamic load on a bearing is vibration. This study examines how the influence of dynamic loads on the thickness of the film layer formed and the pressure that occurs in contact between the cylindrical roller and the inner ring. The dynamic load studied in this study is the fluctuation of the load generated by external influence of vibration, which theoretically changes the actual load acting on the sinusoidal fluctuating bearings. The simulation begins with a static load condition, the results of this static simulation are used for dynamic load simulation in solving the Reynolds transient equation where the influence of time cannot be ignored anymore. The finite difference method with a central-difference scheme is used to solve the Reynolds equation. The results showed the thickness of the film layer and the pressure that occurs changes every time. The greater the amplitude of the excitation the greater the pressure applied to the contact, the thinner the film formed. The frequency of excitation affects the number of repetitions of loads that work at one particular time. Keywords: Transient Elastohydrodynamic Lubrication, Roller Bearings, Dynamic Loads, Amplitude, Frecuency
Kaji Numerik Pengaruh Temperatur Terhadap Ketebalan Lapisan Film Dan Tekanan Pada Roller Bearing Menggunakan Metode Beda Hingga Lazardo, Iqbal; Cupu, Dedi Rosa Putra; Nazaruddin, Nazaruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The temperature is one of the factors to affect the performance of bearings. High temperatures will decrease the lubricant properties, which its allow direct contact between bearing components. This study examines influencing of the temperature on the pressure of the cylindrical roller bearing and the thickness of film layer in the lubrication of elastohydrodynamic lubrication (EHL) in the contact area. In this research was conducted simulation method by varying the working temperature at 30oC, 60oC, and 100oC. In this simulation applied the finite difference method in solving the Reynolds equation and the pressure-viscosity equation to analyze the EHL pressure and the thickness of the film layer formed. The simulation results were obtained at temperatures of 30oC and 60oC the thickness of the film layer and the pressure forming that were a safe condition. Howaver, the temperature of 100oC was revealed a quite risk (critical) condition due to the thickness of the film layer almost touches zero, which resulted the direct contact (solid contact). Keywords: elastohydrodynamic lubrication, temperature, mineral oil.
Perancangan Rangka Mesin Press Hidrolik Kapasitas 50 Ton M, Riki Fredrik H; Herisiswanto, Herisiswanto; Cupu, Dedi Rosa Putra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Press machine is a machine design to produce a high pressure, which is applied to facilitate human work such as destroying an object, push or lift it. The power source can come from the hydraulic machines, human power, electric motors and others. The purpose of this study was to obtain the results of design of the framework of press machine in form of technical drawings and analysis of strength of the structure. This research is limited by loading of 50 tons. The research was began with data collection, design, then technical drawing and final design. The material in this research used St 50. Based calculations result was performed the stress that occurs in the cylinder holder of 3.4 N / mm2, on the table is 2.6 N / mm2. The deflection was occurred in the cylinder stand of 0.017 mm, on the table is 0.54 mm. Keywords: Press machine, Frame design, Hydraulic system, Technical drawings
Kaji Numerik Pengaruh Eccentricity Ratio Dan Radius Bearing Terhadap Ketebalan Film Dan Tekanan Hidrodinamik Menggunakan Finite Difference Method Arafi, Gani; Cupu, Dedi Rosa Putra; Syafri, Syafri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Journal bearing operates, the relative motion between journal and bearing as well as lubricant form a lubricant film to prevent the direct contact between both surfaces of the journal and the bearing. The entire surface is separated by the lubricant film so that there is no direct contact between the two surfaces. This research was conducted to calculate the pressure and film thickness distribution using the Finite Difference Method (FDM) in solving partial differential equations of the Reynolds equation. The central difference scheme was used in this simulation because this scheme is more accurate than the other difference schemes. Some factors influencing the generated pressure and film thickness distribution were studied in this research, i.e. eccentricity ratio and radius of bearing. At the eccentricity ratio of 0.632 the dimensionless maximum pressure are 8.0952 which occurred at and the dimensionless minimum film thickness are 0.368 at respectively. This research also found that the greater the value of the eccentricity ratio, the greater the pressure generated between the contacting surfaces. Besides, the eccentricity ratio causing the change of the location of maximum pressure because, at axis rotation the central point of the journal and bearing center point shift with increase eccentricity ratio. Increasing of the radius bearing causes the decrease of the ratio of length and diameter of bearing (L/D ratio) and decreases the maximum pressure.Keywords: Journal bearing, Eccentricity ratio, Radius Bearing, Hydrodynamic Pressure, Film Thickness
Perancangan Dan Pembuatan Komponen Mesin Pembuat Bakso Menggunakan Screw Conveyor Dengan Pemotongan Bakso Secara Mekanik Jon Aristo; Nazaruddin Nazaruddin; Dedi Rosa Putra Cupu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Various efforts have been made to develop the efficiency of time and effort on making meatballs, including this machine a good time efficiency in making meatballs in which the meatball machine forms meatballs of 250 to 280 meatballs / minute. The principle working of this machine is iguite simple where the meatball dough will be input into the dough container and processed by a screw conveyor, when the meatball dough has pressure due to screw conveyor, the meatball dough will be forwarded to the meatball printing dies, and after the dough through the dies meatball printer, meatball will be cut by two plates that move horizontally, the cut meatballs will fall into a tub of boiled meatballs due to the gravitational force. The dimensions of the screw used in this machine a size diameter of 65 mm with a screw shaft diameter of 25.4 mm. With the dies thickness used, which is 25.5 mm, it can accept the load distributed from the screw so that the dimensions of dies used can be declared safe. With the rotational speed of the dies pulley used the same as the cutting speed of the meatballs so that the distance between the pulley dies and the meatball cutting pulleys is 150 mm with the belting size A-24 with a tensioner as far as 26.9 mm. The hand hand cutting angle will affect the distance of the blade where this angle is 43o Keywords: Dies, Screw Conveyors, Tensioners, Blades
Kaji Numerik Pengaruh Bio-Based Lubricant Terhadap Ketebalan Lapisan Film Dan Tekanan Elastohydrodynamic Pada Cylindrical Roller Bearing Menggunakan Metode Beda Hingga Adibyathul Fikri Januar; Dedi Rosa Putra Cupu; Nazaruddin Nazaruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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Abstract

In this research, numerical study are used to examine the effect of bio-based lubricants, i.e. coconut oil, olive oil, and palm oil as lubricants in the application of roller element bearings, or called elastohydrodynamic lubrication (EHL), especially in contact with the inner ring with cylindrical roller elements. This simulation applies the finite difference method to solve the Reynolds equation and the pressure-viscosity equation to analyze the EHL pressure and the thickness of the film layer formed. The results show that olive oil is the right choice in replacing mineral oil in the application of roller bearings. By providing variations in load and speed, olive oil shows the results of low pressure spikes or no pressure spikes during the simulation process. However, in general coconut oil and palm oil can replace mineral oil as a function of lubrication. As a comparison purpose, mineral oil (P150N) is used to see the difference that occurs in the EHL pressure and the thickness of the film layer formed. Keywords: elastohydrodynamic lubrication, film thickness, bio-based lubricant
Perancangan Sistem Transmisi Mesin Pencetak Bakso Kapasitas 250-280 Butir/Menit Yefrizal Yefrizal; Nazaruddin Nazaruddin; Dedi Rosa Putra Cupu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The process of making meatballs is still using a very manual method that is by using the hand. Making manually requires a long time and is still doubtful about its cleanliness. One solution to this problem is to design a meatball molding that can help small businesses to produce more efficient and effective processed meatball production. The results of designing a molding machine for meatballs with a capacity of 250-280 grains/minute, produce specifications using an electric engine drive with a power of 1 HP with a speed of 1440 rpm. The source of the forces acting on the shaft is the pulling force on the belt. The engine transmission system uses pulleys with an outer diameter of 2 inches and 9 inches that connect the motor to the connecting shaft with v-belt type A no 38, from the connecting shaft to the cutter with 2 pulleys with a diameter of 3 inches using a v-belt no 20, then pulleys connecting the connecting shaft with the stirrer shaft with a size of 3 inches and 7 inches using v-belt type A no 42. For the size of the connecting shaft with a diameter of 25.04 mm.Keywords: meatballs, shaft, pulleys, v-belt
Kaji Numerik Pengaruh Bio-Based Lubricant Terhadap Ketebalan Lapisan Film Dan Tekanan Hidrodinamik Pada Journal Bearing Menggunakan Finite Difference Method Rijaluddin Farihd; Dedi Rosa Putra Cupu; Syafri Syafri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In journal bearings, there is a contact between the shaft and the bearing. The impact that occurs on these contacts is friction which causes wear on the bearing material. This research was conducted to see the effect of bio-based lubricants on the distribution of hydrodynamic pressure and the film thickness on the journal bearings. The numerical assessment was carried out for this study using one of the numerical methods, namely the finite difference method. The finite difference method is a method commonly used to solve the Reynolds equation in which this equation is used to calculate the pressure distribution. The FDM discretization scheme use in this simulation was central-difference because it has a more accurate value approach to the actual value than using other schemes. This research was conducted by varying several parameters with different results. The different types of bio-based lubricants affect the pressure distribution, but not the film thickness which can only be measured by the eccentricity ratio. It was obtained from several bio-based lubricants, namely coconut oil, olive oil, and palm oil that the better lubricant to use is coconut oil because it produces less pressure for other types of lubricants. Keywords : Journal Bearing, Bio-Based, FDM.
Co-Authors Adibyathul Fikri Januar Adji, Aryo Kuncoro Afrizal, Efi Agus, Muhammad Jepri Akbar, Musthafa Anita Susilawati Anuar, Kaspul Apriel Fernandus Nainggolan Arafi, Gani Awaludin Martin Evander Simanjuntak Fadila Alfandi Feblil Huda Gilang Syukma Pratama Gun Faisal Herisiswanto Herisiswanto Herisiswanto Herisiswanto Herisiswanto Herisiswanto Herisiswanto, Herisiswanto Jon Aristo Kalduma, Ibnu Lazardo, Iqbal M, Riki Fredrik H N. Nazaruddin N. Nazaruddin Nandha Syamza Nazaruddin Nazaruddin Nazaruddin Oktaviandi Adeka Putra Putra, Afriadham Rijaluddin Farihd Somadona, Sonia Syafri Syafri Syafri Syafri Syafri, Syafri Wardana , Ade Alwi Warman Fatra, Warman Yefrizal Yefrizal Zulfikar, Zeta