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Politeknik Negeri Lhokseumawe Jl. Banda Aceh-Medan Km. 280,3, Buketrata, Mesjid Punteut, Blang Mangat, Kota Lhokseumawe, 24301 Aceh, Indonesia
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INDONESIA
Jurnal Polimesin
Published by Politeknik Negeri Lhokseumawe
ISSN : 16935462     EISSN : 25491199     DOI : http://dx.doi.org/10.30811/jpl
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering
Mechanical Engineering - Energy Conversion Engineering - Material Engineering - Manufacturing Technology - Mechatronics - Machine and Mechanism Design - Biomechanics
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 503 Documents
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Aanalisa partikel kontaminasi minyak hidrolik excavator hitachi pengusaha galian C di Aceh Utara A Jannifar; Yuniati Yuniati; Muslem Muslem
Jurnal POLIMESIN Vol 14, No 1 (2016): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v14i1.295

Abstract

Minyak hidrolik merupakan bagian yang sangat penting untuk diperhatikan pada penggerak hidrolik seperti pada Excavator. Disamping itu juga berfungsi sebagai pelumas yang dibutuhkan mesin untuk melindungi komponen-komponen mesin dari keausan. Dalam penelitian ini dilakukan pengujian terhadap minyak hidrolik Excavator Hitachi yaitu untuk melihat tingkat kebersihan minyak hidrolik pada Excavatoryang berada di Aceh Utara. Pengujian karakteristik fisika/kimia minyak hidrolik dilakukan dengan menggunakan alat uji Contamination Control System (CCS2) dengan mengacu pada spesifikasi ISO 4406. Hasilnya adalah bahwa dari beberapa sampel minyak hidrolik yang diuji terdapat kandungan pertikel yang terkontaminasi berukuran 4μm, 6μmdan 14μm dengan jumlah yang melebihi batas kelas maksimum yaitu 20/18/15. Minyak hidrolik yang di uji yaitu jenis Turalik 48 dan meditran S 10W yang diambil dari Excavator Hitachiyang ada di Aceh Utara. Hasil penelitian tersebut menunjukkan bahwa minyak hidrolik jenis Turalik 48 kelas 23/21/18 diambil pada Excavator Hitachi Ex200.14M 83629 jam kerja 1720/jam mengandung pertikel yang terkontaminasi yaitu 8.000.000 4μm, 2.000.000 6μmdan 250.000 14μm. Meditran S 10W kelas 23/21/18 diambil pada Excavator Hitachi Ex200.40805 jam kerja1420/jam mengandung pertikel yang terkontaminasi sama dengan Turalik 48 yang telah disebutkan yaitu 8.000.000 4μm, 2.000.000 6μm dan 250.000 14μm. Meditran S 10W kelas 22/20/17 diambil pada Excavator Hitachi Ex200.33041 jam kerja 1520/jam mengandung pertikel yang terkontaminasi yaitu 4.000.000 4μm, 1.000.000 6μm dan 130.000 14μm.Turalik 48 kelas 21/19/16 diambil pada Excavator Hitachi Zx200.HOM1G600H0011919 jam kerja 1252/jam mengandung partikel yang terkontaminasi yaitu 2.000.000 4μm, 500.000 6μm dan 64.000 14μm. Meditran S 10W kelas 19/17/14 diambil pada Excavator Hitachi Ex200.26037 jam kerja 1000/jam mengandung pertikel yang terkontaminasi yaitu 500.000 4μm, 130.000 6μm dan 16.000 14μm.Turalik 48 kelas 18/16/13 diambil pada Excavator Hitachi Ex200.52011 jam kerja 850/jam mengandung pertikel yang terkontaminasi yaitu 250.000 4μm, 64.000 6μm dan 8000 14μm. Meditran S 10W baru kelas 16/14/11 mengandung partikel yang terkontaminasi yaitu 640.000 4μm, 160.000 6μm dan 2000 14μm dan Turalik 48 baru kelas 14/12/09 mengandung partikel yang terkontaminasi yaitu 16.000 4μm, 4.000 6μm dan 500 14μm.Kata kunci : Minyak hidrolik, partikel, kontaminasi, kebersihan.
Experimental investigation on strain behavior of jute/polyester composite with an open hole under axial loading Anggit Murdani; Utsman Syah Amrullah; R.N. Akhsanu Takwim
Jurnal POLIMESIN Vol 21, No 3 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i3.3931

Abstract

Mechanical assembly requires joint mechanism involving fasteners and holes. Deformation of the holes will greatly affect the integrity of the mechanical joins. This research objective is to reveal the strain behavior of jute/polyester composite containing open hole under axial loading. It is very important to know the behavior of the strain surrounding the hole under loading. Experiments were carried out by preparing jute/polyester composites. The composites were manufactured by using a vacuum infusion method. There are two configurations of the number of laminations, i.e., 3 and 5 sheets and of hole sizes, i.e., 5 and 10mm holes. An axial load is applied to the specimen through a tensile test. Strain gauges are attached near the holes, axially and laterally. Strain in axial and lateral directions in the vicinity of a hole is recorded and presented. The research result shows that the strain gauges located parallel to the loading axis indicate a positivestrain value. On the other hand, the strain gauges located lateral to the loading axis indicate a negative value. Furthermore, the strain gauges located beside the hole in the direction parallel to the loading axis indicate the highest strain value in all types of specimens.
Design of Onion Epidermis Peeling and Onion Smoothing Machine with Rubber Friction Method Application Fadwah Maghfurah; Riki Effendi; Mochammad Nurul Aini
Jurnal POLIMESIN Vol 18, No 1 (2020): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i1.1459

Abstract

Onions are the main ingredients for all types of cuisine so the level of demand is quite high. In the industrial world, a great number of processes of onion epidermis peeling are still using either manual and simple low capacity methods or high capacity machines with expensive components. Therefore, it is necessary to make a high capacity machine to peel the onion epidermis in a short time by using inexpensive and durable components that are designed with the help of Solidworks software. The onion epidermis peeling and smoothing machine uses a  0.5 HP electric motor power as a bond drive and  a rubber friction method for the process of peeling the onion epidermis. Besides, this machine is also designed to be compatible with peeling by connecting the rotation of the motor that is directly connected to the electric motor so that its design is simpler and does not require a long cycle of time. This peeling process is able to peel 2 kg of onion in 3 minutes and 0.5 kg for the refinement process in 5 minutes.
Perancangan mesin perajang bawang serbaguna berpenggerak motor listrik dengan kapasitas 55 kg/jam Riki Effendi; Muhammad Khumaidi
Jurnal POLIMESIN Vol 16, No 2 (2018): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v16i2.584

Abstract

Abstract This study aims to create a versatile multipurpose machine design to support increasing production of Usaha Masyarakat Kecil Menengah (UMKM), especially in the business of onion slices that are ready to be fried. The design of this machine has several concepts with steps such as: requirement, problem analysis and specification, design of machine concept, technical analysis, modeling up to work drawing, tool making, assembling and testing. This machine uses electric motors with low power and the price is relatively cheap, so this machine is affordable for the community of UMKM. After doing research on slicing machine of onion by using onion slicer got maximum capacity of 55 kg per hour with 400 rpm slicing knife rotation and 1 mm slice thickness. Keywords: Designing, Chopping Machine, Red Onion, Slicer
The effect of friction spot stir welding in installing rivet double cover lap joints on 7075–T6 aluminum plate on shear strength Sehono Sehono; Aseng Franslee Sitopu
Jurnal Polimesin Vol 21, No 5 (2023): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i5.4080

Abstract

FSSW is a variation of FSW developed in metal processes. The principle of FSSW is rotating an object that is wear-resistant and then rubbed with a plate joint. The use of FSSW can be utilized in the installation of rivets such as in the drilling process, so this process needs to be investigated. This is because the heat caused by rotation will change the mechanical properties of the material so further research is needed. In this study, a connection performance comparison was made between the FSSW method and the drill. The plate used is aluminum 7075-T6 with a lap joint connection type. To find out each performance, a shear test, hardness test, and metallographic test were carried out. From the results of the shear strength test, it can be concluded that the FSSW variation is the best with an average shear strength value of 755,190 MPa, while the drill variation has an average shear strength value of 470,227 MPa. The average value for drill variations in the HAZ area was 185.06 while for the FSSW variation, it only reached 147.75. The macro test results proved that the cause of the shear strength in the FSSW was greater than that of the drill, this was caused by the difference in the size of the rivet diameter due to the use of a bad rivet gun. Meanwhile, based on the results of micro photos, the size of the structure in the HAZ area will be relatively longer than the RAW section, this is caused by friction between the tool and the workpiece
PRODUCT DESIGN SIMPLIFICATION TO INCREASE COMPETITIVENESS WITH A VALUE ENGINEERING APPROACH TO THE WASTAFEL FLEAN INDUSTRY Ruspendi Ruspendi; Anthon Rudy W; Riki Effendi
Jurnal POLIMESIN Vol 19, No 2 (2021): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v19i2.2050

Abstract

The strength of international competitiveness encourages companies to do optimization. Therefore, the increase in productivity which improves competitiveness must be done. The purpose of this study is to look for the best solution to optimize designs with the best value and cheapest engineering approach that can be executed on the sink faucet production. After a value engineering, obtained high-cost items such as components with brass/metal, local and imported material. Then look for alternative designs with cost criteria, namely Life Circle Cost (LCC) and the Initial Cost as well as with zero one non-cost criteria matrix and pairs matrix. The result obtained a design that qualifies for the product by replacing the faucet's construction and dimensions but still meets the requirements of comfort, functionality, and safety in use. With this alternative earned savings of 19.6% of the total cost.
Characterization of FDM 3D Printed Parts Using TPU + PETG Filaments For Shin Guard Products Mahros Darsin; Agit Yoga Yulio; Ahmad Syuhri; Mochamad Edoward Ramadhan; I Made Ivan W.C.S; Sumarji Sumarji
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4122

Abstract

3D printing machines are used to print products that support sports activities, such as shin guards. During sports, shin guards are protective equipment to prevent injury to the lower legs. Filaments that are suitable for making shin guards are thermoplastic polyurethane (TPU) and polyethylene terephthalate (PETG) because they have impact resistance properties needed to protect the feet during sports. The variation is the level parameter layer height, nozzle temperature, printing speed, and bed temperature. Next, an impact test will be carried out to determine the optimal parameter variation on the 3D printing machine, which is expected to be a reference for printing quality products. This study uses a 3D printer, Ender v3, to print specimens and shin guard products. The material used is TPU+PETG filament. The Taguchi method with the orthogonal matrix L9(3)4 was repeated thrice for each experiment. After that, an analysis of variance was carried out. Parameter variations used in the study were layer height (0.1 mm, 0.2 mm, 0.3 mm), nozzle temperature (220℃, 225℃, 230℃), printing speed (45mm/s, 45mm/s, 50mm/s) and bed temperature. (70℃, 75℃, 80℃). In this study, Charpy impact testing will be carried out. The combination of factors that can produce an optimal impact test is layer height level 2 (0.2 mm), nozzle temperature level 1 (220℃), printing speed level 3 (50 mm/s) and bed temperature level 2 (75℃) with an impact strength value the highest was 27.20 and the lowest was 11.07. The combination of factors that have the most significant effect on the impact test strength values is layer height 63.97%, nozzle temperature 6.19%, printing speed 2.07% and bed temperature 4.74%.
Identification of Mothballed and Retired Units of Reliability-Based Steam Power Generation Systems M Sabri
Jurnal POLIMESIN Vol 20, No 2 (2022): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i2.2598

Abstract

A steam power generation system is a power generation system that uses steam power. The generating system itself has two types of unit statuses, namely active and inactive, which in this case are subdivided into Mothballed and Retired Unit statuses. The status of the unit provides a statement or decides whether the generating system is still suitable for use or has to be replaced (inactive). Determination of the status of the unit in the steam power generation system is carried out by calculating the work reliability of the generating unit. This is done to get the maximum decision. If you set the unit status incorrectly, the production costs incurred will be greater and not proportional to the number of products produced. This study focuses on two power generation units that have been used for a long time and experienced a decrease in performance. Therefore, identification of the status of the Mothballed and Retired Units of the steam power generation system was carried out by using a reliability test so as to produce a decision in determining the status of a more reliable unit. The method used to determine the status of the unit is to use the Reliability Block Diagram (RBD) and the Generating Availability Data System (GADS), the results of which state that unit one is in Mothballed status, which means the unit is no longer active but can still be used or reactivated within a period of several months. with a reliability level of 4.92% if it operates for 800 hours or a month. Meanwhile, unit two is declared to have the status of Retired Unit or can no longer be used again.
The Effect of Varying Torrefaction Temperature on the Physical and Mechanical Properties of Briquettes Made from King Grass Rifanida Rifanida; Adi Setiawan; Shafira Riskina; Abubakar Dabet; Alchalil Alchalil
Jurnal POLIMESIN Vol 21, No 1 (2023): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i1.3274

Abstract

Indonesia is a country which has rich biological diversity. King grass (Pennisetum Purpupoides) is one of biological species which easily grow but has not yet been optimally used. This study examined the physical, mechanical, and thermal properties of bio-briquettes produced from king grass which has been torrefied at temperatures of 150˚C, 175˚C and 200˚C. Prior to torrefaction process, fresh king grass was chopped to a size 3 cm, dried under the sun for five days, and then put into the torrefaction reactor with a residence time of 45 minutes. The resulting solid product, i.e. bio-char was then pulverized and sieved to a particle size of 40 mesh, then mixed with 20% wt binder and stirred manually to reach homogeneous. Subsequently, a purposely made press machine was used to produce briquette at a pressure of 150 kg/cm2 followed by drying the product under the sun for three days. The briquette characterization employed several techniques including thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), bomb calorimeter, and mechanical testing. The results showed that the calorific value of king grass increased from 3747 cal/g to 4346 cal/g after the torrefaction process at a temperature of 175˚C. The results of the proximate test showed that the fixed carbon content increased from 4.76% to 25.75% after the torrefaction process at a temperature of 175˚C. In terms of mechanical properties, it is known that the torrefaction process of king grass has significantly improved the friability, density and size stability. Overall, this study has succeeded in revealing the potential use of briquette products made from king grass as alternative fuel for co-firing at steam power plant
Disain kopling flens kaku berbasis cad Samsul Bahri
Jurnal POLIMESIN Vol 6, No 2 (2008): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jop.v7i2.1378

Abstract

Kopling flens kaku berfungsi meneruskan daya dan putaran. Dimensinya sangat ditentukan oleh daya dan putaran yang bekerja. bahan dan faktor keamanan yang digunakan. Perhitungan dan penggambaran secara manual disamping memberikan hasil yang kurang teliti juga sangat tidak efektif dalam penggunaan waktu. Disain kopling flens kaku berbasis computer aided design memberikan hasil yang lebih teliti dengan waktu yang singkat. Parameter rancangan didasarkan pada diagram alir rancangan kopling flens kaku. Struktur program terdiri dari bagian input data rancangan, data kopling flens kaku dan bahan standar, perhitungan dan analisa tegangan tarik pemenuhan fungsi tujuan, dan bagian output yang merupakan decision variable dan gambar CAD.Kata kunci : Disain, kopling flens kaku, file script, CAD.

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