Journal of Energy, Mechanical, Material and Manufacturing Engineering
Journal of Energy, Mechanical, Material and Manufacturing Engineering Scientific (JEMMME) is a scientific journal in the area of renewable energy, mechanical engineering, advanced material, dan manufacturing engineering. We are committing to invite academicians and scientiests for sharing ideas, knowledges, and experiences in our online publishing for free of charge. It would be our pleasure to accept your manuscripts submission to our journal site.
Articles
35
Articles
Mechanical and Corrosive Nature of Galvanized Steel in Sodium Chloride Solution

Chowdhury, Azrin Akhter

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 2 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

Galvanizing also denoted as zinc coating is a scientifically approved method applied to protect iron and steel against the effects of corrosion. In the galvanization process, aluminum is added with zinc. Zinc has numerous properties under different environmental conditions. These properties are subject to change when it comes to the coating process. The common properties here may include its appearance, hardness, the thickness along with other mechanical and physical properties. Due to these properties, there may also be inconsistency on the coating structure. So the addition of aluminum unto zinc, will ensure that various properties are eliminated for the better improvement of the zinc coating process. Aluminum possesses stronger mechanical properties and therefore valid for the coating process. It ensures that zinc is not arrived at by the corrosion agents. In this study, the focus will largely be based on the impact of aluminum on corrosion behavior as aligned to hot-dip galvanized steel. However, in this study, the galvanization process was performed using the dry process. The percentage variation of zinc resulted in different results in the rate of corrosion. The hardness of zinc thus increased via additional of aluminum percentage.

Optimization Design of Multifunction Machines For Making 2 Kinds of Animal Feed

Effendi, Riki, Maghfurah, Fadwah, Rudiarto, Rudiarto

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 2 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

Optimization design of multifunctional machines for making of animal feed is one of the development efforts of conventional machinery to be a multifunctional machine with electric motor drive which is to help small MSME industries so that their results and capacity are faster and more effective during the process of milling and grinding. This is a new concept designed to increase the time effectiveness of its use. This tool is specifically designed to chop odot grass and grind corn kernels, where the tool works using resources from an electric motor that moves a U-type blade or type I blade for knitting or grinding. The method used to make multifunction machines includes the development of existing models, seeking research on previous tools, refining the design model concept, making 3D models using the Solidworks Computer Aided Design (CAD) with a cycle time of 50 seconds on different test pieces and mills where assembly time is needed to complete the multifunction machine for 20 days or 28800 minutes.

Effect of Pipe Cutting Gap using CNC toward Surface Hardness

Fahruddin, A'rasy

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 2 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

This research concerned the standard value of surface roughness on Computer Numerical Control (CNC) to obtain fine pipe cutting result and is more useful for company to simply recognize the appropriate standard gap in designing. Standard design used is 30 mm with 3 specimen variations and variation gap value of 42 mm, 44 mm, and 46 mm. In recognizing fine refinement, standard on Roughness Average (RA) is used with surface roughness scale tool. Based on the experiment, it shows that gap design for pipe with Computer Numeric Control (CNC) in 30 mm has less optimum result because its cutting result still has crust, the gap is still considered too close. Therefore, re-grinding was conducted to result smoother result in achieving surface roughness value of 32RA. Fine pipe result without crust is 46 mm with roughness value of 4 RA. The smaller value obtained from measuring surface roughness, the more optimum result obtained.

Analysis on Centrifugal Pump Performance in Single, Serial, and Parallel

Ansori, Faisal, Widodo, Edi

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 2 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

The pump is a tool to provide the mechanical energy to the liquid in the pump constant fluid density and large. In terms of mechanism, the pump is divided into three types, namely, rotary pumps, pump the shaft/piston and centrifugal pumps. The use of the pump are the most widely used either in the household or in the environment industry. In the centrifugal pumps, there are losses losses among other head losses. To find the head losses among other data needs head on the pump, the pump and the discharge flow rate of the pump. Head is defined as energy per unit weight of the fluid. The head of the unit (H) meters or feet is fluid. In the pump, the head is measured by calculating the difference between the total pressure of the suction pipe and the pipe press, when measurement is done at the same height. For single full pump openings 0,00246 m \ s, valve openings 0,00210 and aperture of 0,00177 m \ s can be concluded the discharge of water at the pump the larger the opening of the valve the greater the discharge of its water. Moreover, vice versa, if the opening of the valve is getting smaller then the water debit is getting smaller. For full opening valves 3,11 m / s, for openings 2,65 m / s and 2,23 m / s open valve openings. For the flow, velocity can be concluded the greater the opening of the valve the flow velocity is smaller and vice versa the smaller the opening of the valve the greater the flow rate. single centrifugal pump full valve openings 0.409 kg / cm, the opening of the valve 0,209 kg / cm and the opening of the valve 00,069 kg / cm can be concluded the smaller the opening of the opening valve the smaller the head as well, and the greater the open valve opening, the more big head also in the can.

Parkinson Disease Detection Based on Voice and EMG Pattern Classification Method for Indonesian Case Study

Putri, Farika, Caesarendra, Wahyu, Pamanasari, Elta Diah, Ariyanto, Mochammad, Setiawan, Joga D

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 2 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

Parkinson disease (PD) detection using pattern recognition method has been presented in literatures. This paper present multi-class PD detection utilizing voice and electromyography (EMG) features of Indonesian subjects. The multi-class classification consists of healthy control, possible stage, probable stage and definite stage. These stages are based on Hughes scale used in Indonesia for PD. Voice signals were recorded from 15 people with Parkinson (PWP) and 8 healthy control subjects. Voice and EMG data acquistion were conducted in dr Kariadi General Hospital Semarang, Central Java, Indonesia. Twenty two features are used for voice signal feature extraction and twelve features are emploed for EMG signal. Artificial Neural Network is used as classification method. The results of voice classification show that accuracy for testing step of 94.4%. For EMG classification, the accuracy of testing of 71%.

Effects of Origami Pattern Crash Box and Rectangular Pattern Crash Box on The Modelling Of MPV Car Structure on Deformation

Kusyairi, Imam, Choiron, Moch. Agus, Irawan, Yudy Surya, Himawan, Helmy Mukti

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 2 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

Crash box serves as a kinetic energy absorber during collision. It has a tube shape, which is located between bumper and chasis. The crash box design requires development in order to reduce buckling mode and obtain symmetry folding mechanism, so it will achieve greater energy absortion. The researchers find a method to reduce tension due to impact by providing dents in crash box geometry. This research observed origami pattern crash box design having dents functioned as pre-folded so that collapse mode can be predicted and stable. In this research, the crash box was modeled according to the size of bumper and chassis on the MPV car. Testing simulation was performed by modelling Impactor as rigid body and crash box as flexible. Fixed support was housted in the surface of rear side of the crash box. Simulation process was started from the impactor moving to supress crash box. This Impactor collision led to deformation on the crash box. Crash box material was AA7004-T7, it was modelled as bilinier isotropic hardening. Based on the research result, the addition of pre folded pattern is able to reduce impact force at the first impact and has stable characteristic as well as predictable collapse mode.

The Influence of Welding Ampere Range to ST-40 Shear Strength with Butt Joint

Winarno, Rudi, Daryono, Daryono, Jufri, Moh.

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 2 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

This experiment was conducted on the influence of welding process with ampere range variation and weld joints toward ST-40 shear strength. Furthermore, welded specimen is tested with tensile test. Method of this experiment is testing shear strength by using tensile testing machine where each five-specimens were previously welded by ampere range of 80 A, 90 A, and 100 A. Shear results show the highest shear strength is on 128.4916 N/mm2 with 80-ampere range on specimen no. 5, while on 90-ampere range variation the highest shear strength is on 124.7528 N/mm2, the specimen no. 5. Meanwhile, on 100-ampere range variation, the highest shear strength is on 120.1484 N/mm2, the specimen no. 4. The higher ampere (I) used, the higher heat (Q) resulted. When the heat increases, the welding electrode is perfectly fused. It makes good welding result achieved. The more strength on welding result, the higher shear strength (?) achieved. On the other hand, the higher ampere range on welding process results higher shear strength.

Defect Prediction at The Superplastic Forming Process of The Bipolar Plate by Simulation

Choirotin, Ismi, Choiron, Moch. Agus

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 1 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

 Improper parameter setting at the bipolar plate forming by superplastic process will outcome damage to the final workpiece. By employing computer simulation, the defect at the bipolar plate could be predicted close to the maximum thickness reduction and the effective stress data. Simulate the fabrication of bipolar plate by a number of forming temperature (350 ?? 450 °C) and air pressure (0.25 ?? 1 MPa) utilize Ansys, resulting maximum thickness reduction and effective stress occurred at 450 °C and 1 MPa. Make reference to the result, the bipolar plate didn??t expose any deficiency with 36.75% maximum thickness reduction. Have recourse to simulation will abbreviate the trial and error method as of the production process will more effective and efficient in terms of time and cost

Effect of Mould and Melt Temperature on the Properties of Styrene Acrylonitrile Moulded Parts

Budiantoro, Cahyo, Nugroho, Adi

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 1 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

The quality of injection moulded parts can be influenced by processing parameters. The effect of mould temperature and melt temperature on the weight and shrinkage of Styrene Acrylonitrile moulded part was observed in this research. It was found that by increasing mold temperatures at constant melt temperature and injection speed, the weight of the part decreased and the shrinkage value slightly decreased. On the other hand, by increasing melt temperature at constant mold temperature and injection speed, the part weight increased. Both mold temperature and melt temperature gave only a small effect because the temperature difference was not too large.

Thermal Characteristic of Fire Resistance Electrical Cable for Residential Wiring Installation

Sari, Yunita

Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 1 (2018)
Publisher : University of Muhammadiyah Malang

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Abstract

The objective of the research was to investigate thermal characteristic of electrical cable for residential wiring installation in order to acquire the initial data for fire protection study especially connected to short circuit. The research methods were testing the characteristic of cable by differential scanning calorimetry (DSC), fire resistant test, and current injection test according to International Standard IEC 60332-1-1. The results of the test were: differential scanning calorimetry gave the flame temperature of the cable was 3100C, fire resistant test shown the length of charred/melted cable was 65 mm and fire was extinguished in 10 s after the source of flame was cut, the current injection test showed that for current of 60 A, the cable started to melted and produce smoke after 270 s. The result showed that the cable comply with the specification, i.e. flame retardant cable or fire resistance cable as proved by test results and can be concluded that the cable gives adequate protection to the fire. Also, it can concluded that whenever short circuits occur, the cable able to withstand the high current and temperature for prolonged time and may only resulted in charred or melted only and doesnt make the cable came into flame/fire. Even if the fire is occurred in the cable as results of short circuit, the propagation is relatively not existed.