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INDONESIA
Mekanika : Jurnal Teknik Mesin
Published by Universitas 17 Agustus 1945 Surabaya
ISSN : 24603384     EISSN : 26863693     DOI : https://doi.org/10.12345/jm.v8i2
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Focus and Scope Mekanika: Jurnal Teknik Mesin accepts conceptual articles or research results including: Aerodynamics and Fluid Mechanics Biomechanics Combustion and Energy Systems Design and Manufacturing Dynamics and Control Materials Science and Engineering Vibrations Acoustics and Fluid-Structure Interaction
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 117 Documents
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PENGARUH SALINITAS AIR LAUT TERHADAP LAJU KOROSI BETON BERTULANG DENGAN METODE ICCP Kusminah, Imah Luluk; Adziimaa, Ahmad Fauzan
MEKANIKA: Jurnal Teknik Mesin Vol 3 No 02 (2017): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Beton bertulang adalah material komposit yang terdiri dari beton dan baja tulangan yang diaplikasikan pada bangunan dan struktur jembatan. Berdasarkan kegunaannya, beton bertulang terletak pada media yang sangat korosif yaitu di air laut, karena pH, suhu, dan salinitas. Salinitas air laut berkisar antara 32 - 37 0/00. Penelitian ini dilakukan untuk mengetahui pengaruh salinitas air laut terhadap laju korosi beton bertulang dengan metode ICCP. Penelitian ini dibagi menjadi tiga kondisi lingkungan dengan 3,2%, 3,4%, dan 3,6% NaCl, menggunakan elektroda referensi Cu / CuSO4 dengan standar potensial proteksi -350 mV (ASTM C 876-91) dan stainless steel 304 sebagai anoda. Laju korosi pada 3,2% NaCl adalah 5,2 mpy, laju korosi 3,4% NaCl adalah 6,8 mpy, dan laju korosi pada 3,4% NaCl adalah 17,9 mpy. Berdasarkan uji weight loss dan tabel perbandingan mpy dengan tingkat korosi metrik setara (NACE International, 2002) tingkat korosi pada tiga kondisi salinitas termasuk tingkat yang baik dengan kisaran antara 5-20 mpy.Kata kunci: Laju Korosi, Beton Bertulang, ICCP, Salinitas, Stainless Steel 304.
ANALISA BRIKET BERBAHAN DASAR LIMBAH PRODUKSI SANDAL DAN TEMPURUNG KELAPA DENGAN VARIABEL KOMPOSISI DAN TEKANAN SEBAGAI ENERGI ALTERNATIF Agung, Pramoda; Firmanto, Deta
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 01 (2015): July
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

oblems. The worst happen is at the end of December 2014 within the rainy season, the area was flooded dueto the amount of waste that was caught in the river and gutters. To reduce the negative impact of huge amount ofwaste of production slippers. The author wants to attempt to recycle the waste into alternative energy ie briquettes.Briquettes made not only to reduce the negative impact arising from the accumulated waste sandals production, butalso can be used as an alternative energy fuel. In this case study, first, slipper's waste and a mixture of coconut shellthrough the pyrolysis process beforehand separately about 350-400ºC. Each of the process takes two hoursdepending on the amount of waste in the pyrolysis. Using adhesive from starch glue with a ratio of 10: 1, ie, 1000grams of a mixture of waste and 100 grams of glue. Variation of the components used are piled waste 20%,shell80% and piled waste 60%, shell 40% . Pressed using a manual hydraulic press machine with variations of pressureof 60 kg / cm², 80kg / cm², and 100 kg / cm². Based on the analysis results obtained that the briquettes with acomposition of 60% waste and 40% shell with a pressure of 100 kg / cm² has a calorvalue, long boil, the old ignitionand efficiency most good, with a total moisture content of 10.61%, volatile matter 6:52%, 3.77% ash content, fixedcarbon 79.10% . So when being compared with the existing standard can be quite feasible to used as alternativeenergy.Keywords : piled waste, pyrolisis, briquette
PENGARUH VARIASI DEBIT ALIRAN DAN PIPA ISAP (SECTION) TERHADAP KARAKTERISTIK POMPA SENTRIFUGAL YANG DIOPERASIKAN SECARA PARALEL ., Supardi; Renwarin, Max Millian
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 01 (2015): July
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

The pump is a machine used to raise the liquid from the surface of the low to the higher, or move the fluidfrom the high pressure. Plan and create a means of centrifugal pumps for water flow to the arrangement / circuitParallel to the needs of fluid mechanics lab in August 17, 1945 the University of Surabaya. Step experiment with agate valve openings 900, 700, 500, 350, with a maximum rotation 2580 RPM pump, get the planning andcharacteristics (Head, Capacity) of the two pumps are arranged in parallel. The influence of the suction pipediameter variations on these tests affect the capacity (Q). The larger the diameter of the suction pipe is used, thegreater the capacity of the water produced. The influence of variations in flow through the valve opening effect onHead (H). the smaller the aperture setting, the valve resulting Head Small increasingly.Keywords: Centrifugal Pumps, Suction Pipe, Valves, Head and capacity.
PERENCANAAN ULANG SISTEM INSTALASIAIR BERSIH KANTOR OTORITAS BANDAR UDARA WILAYAH III Martini, Ninik; ., Sudarmono
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 01 (2015): July
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Redesign Water System Intallation Office of Airport Authority Region III. Old building and new buildingAirport Authority Region III has a working installation of water and pumps of different systems. Old buildingconsists of three floors using press tank system (hydrosphere). Being new building consists of 7 floors using rooftank systems. With consideration of cost efficiency of electricity consumption and maintenance costs burden, thepress tank system is considered less efficient because of the fluctuation of the working pressure greater than the tankroof system. This resulted in the pumps often operate ON - OFF quickly also resulting in large power consumptionand potentially cause damage to pumps and installation. The purpose of this study was to plan the installation of thesystem on integrated water on both the building using roof tank system. From the analysis of the water requirementcalculations required water availability of 120 m3 / day. For office buildings with average working hours of eighthours are taken into account during peak usage hours by 27 m3 / h. Of the allowable flow rate, then the dimensionsof the transfer pipes and main pipes  3 inch, collection pipes and branch pipes varies the  ½, ¾, 1, 1¼ and 1½ inch. For ground water tank volume of 90 m3, roof tank was needed capacity of 67.5 m3 (3 units @ 22,500 litertank). Take into account head losses that occur in the transfer pipe, acquired 34 m total head pumps, hydraulicpower with 78% efficiency of 3.21 kW. Of reference brands Grundfos pump then pumps Grundfos selected types ofvertical multistage centrifugal pump with specifications: Type CR (E) 32-2, capacity 32 m3 / h, head 34 m, 4 kWmotor power, supply voltage 3 x 380-480 Volt, 2900 rpm rotation and frequency of 50 Hz. Pumps installed two unitsin parallel.Keywords: the water demand, roof tank, pump, flow rate, reservoir.
ANALISA PENGARUH PUTARAN DAN JARAK (PITCH) PISAU TERHADAP KAPASITAS PRODUKSI LIMBAH SAWI PADA MESIN PERAJANG SAWI Sulistyono, Djoko; Triyono, Achmad
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 02 (2015): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Mustard is a group of plants of the genus Brassica leaves or flowers are used as food (vegetables), both fresh and processed. Mustard Brassica species include some that are sometimes similar to each other. Onecommodity farmers in village Parengan, Krian, Sidoarjo every day requires a mixture of vegetable waste mustard asanimal feed ingredients. Livestock alone is the main food forage. Green feed cattle, namely waste mustard. Forageplays a very important because it contains all the substances necessary livestock. One of them is from the green feedlivestock waste that much mustard in the traditional market. In East Java, many home a chicken farmer, in thehamlet Parengan Kraton Sidoarjo district is very famous for animal breeding chicken. Productivity breeders requirewaste mustard chicken with the chopped in the hamlet Parengan Kraton Krian Sidoarjo can not meet the needs ofthe market, the acquisition of waste results from the traditional markets of 50-80 kg / day, were able to be processed5-15 kg / day using traditional tools ie by perajangan mustard waste manually. Some efforts to increase productionhave been made to spur the development of the farmer, from the conventional to modern process (machine).Therefore conducted research with the title : analysis of effect of round and distance (pitch) pisau to wasteproduction capacity in the machine chooper mustard mustard in the area. In this study the authors calculate thechopper machine design capacity mustard waste by means of varying the distance a knife (0.03 m; 0.04 m; 0.05 m)and the rotation axis (200Rpm, 300Rpm, 400rpm), while the fixed blade diameter, so that obtain optimal results andto determine the engine power is needed, with reference to 250 kg / h, and the conveniences expected chopperengine testing conducted to determine the waste mustard in actual production capacity, and compared with theproduction capacity of the calculation results. The achievement of a production capacity of 247.67 kg / hour is themost excellent results of chopped cabbage waste, using waste mesinperajang mustard dimensions: Diameter 0.28mknife, round knife 300Rpm with a distance of 0.04m. The results showed that the production capacity of wastemustard be 244.28 kg / h (± 250kg / h) using mustard waste chopper machine. Thus the research conducted by thepublic is expected to be implemented in order to further increase production and able to serve the market demand.Keywords : Waste chopper mustard, Distance knife, Round the machine.
ANALISA PENGARUH VARIASI (% BERAT) MAGNESIUM DAN VARIASI TEMPERATUR OKSIDASI PADA PROSES ELECTROLESS PLATING ABU DASAR BATUBARA TERHADAP DENSITAS DAN POROSITAS BAHAN PROPELLER DARI KOMPOSIT ALUMINIUM – ABU DASAR BATUBARA Seputro, Harjo; Prasetio, Budi
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 02 (2015): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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The composite is a combination of two or more different materials on condition the bonding surfacebetween the two materials. One type of composites that much attention is metal matrix composites (KML). In thisstudy investigated how the influence of variations of Mg and temperature variations of oxidation on the density andporosity of the composite amplifier undergo a process of electroless plating with variation (% by weight) ofmagnesium 0,005, 0,010, and 0,015% and variations in temperature oxidation of 100, 200 and 300 C and at holdfor 3 hours, then made composite by Stir Casting casting method. Based on the average chart shows that increasingthe value of (% by weight) of magnesium and oxidation temperature 0C the density values further down, This iscaused by the imbalance between the weight magnesium particles moistened (coal bottom ash) during theelectroless plating process. Based on the results of testing the value of the highest density achieved at a temperatureof 3000C to oxidation (wt%) 0.005 Mg is equal to 2.609 gr/cm3. And the value of the lowest density is achieved at atemperature of 200 0C to oxidation (wt%) Mg 0,010 is equal to 2.406 g / cmKeywords: composite, electroless plating, stir casting, density-porosity.
STUDI EKSPERIMENTAL PROSES HARDENABILITY BAJA AISI 4340 PADA TEMPERATUR 900 O C, 1100 O C, 1400 O C DITINJAU TERHADAP HASIL UJI JOMINY TEST JURUSAN TEKNIK MESIN UNIVERSITAS TUJUH BELAS AGUSTUS 1945 SURABAYA ., Ismail; Imanda, Herman
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 02 (2015): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Experimental Study Process hardenability Steel Aisi 4340 At temperatures of 900 Oc, 1100 c SeenOn Test Results Jominy Test, this research aims to data requirements thesis Department of Mechanical EngineeringUniversity August 17, 1945 Surabaya, Hardenability is the ability of the steel to be hardened to form martensite.Hardenability describe it hardening (depth of hardening) obtained by hardening, usually expressed by a distance ofa point below the surface where the structure consists of 50% martensite (presumed that occurs when a martensitichardening as much as 50%). A steel is said to have a high hardenabiliti if it shows thick steel hardening (depth ofhardening) were large or may harden the entire cross-section of an object large enough. To measure hardenabilition AISI 4340 steel by Jominy way. Testing hardenabiliti manner called Jominy end quench hardenability testbecause the test specimen is used berbentu cylindrical trunk diameter of 1 "(25 mm) long 4" (100 mm) which iscooled at one end. For this test use tool with a hole where the specimen is at its peak. Just below the specimencontained a nozzle diameter of 1 "(12.5 mm) for spraying cooling water to the height emission-free 2.5" (65 mm).Among the specimens with a nozzle mounted plate barrier that can be opened quickly shortly after the specimen isplaced in the holder hole. From the results of this test to obtain violence on AISI 4340 steel is higher than thestrength before doing the testing process.The test rod is heated at tempratur austenisasi for 30-35 minutes. Furnace atmosphere should be kept neutral inorder to avoid the formation of slag and carburizing. After the testing process Jominy This test is continuedkesebuah Rockwell testing process and testing of microstructure (Metallography), to obtain a data for theobservation process.Keywords: Process hardenability Steel Aisi 4340 Against Jominy Test Results Test
PENGARUH PEMANASAN SINTERING-QUENCHING-AGING TERHADAP STRUKTUR MIKRO DAN KEKERASAN PADA PADUAN Al 6061 Mastuki, Mastuki
MEKANIKA: Jurnal Teknik Mesin Vol 2 No 02 (2016): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Percobaan ini mempelajari pengaruh perlakuan panas sintering-quenching-aging dengan waktu tahan selama 1, 2, dan 3 jam terhadap struktur mikro dan kekerasan pada paduan alumunium. Terdapat 4 sampel paduan alumunium sejenis yang digunakan, 1 sampel diamati struktur mikro dan diuji kekerasannya terlebih dahulu, dan sampel yang lainnya mendapat perlakuan dengan variasi watu tahan pada proses aging, yaitu selama 1 jam, 2 jam, dan 3 jam sebelum dilakukan pengamatan struktur mikro dan sifat kekerasannya. Sampel disintering hingga 5000C dan diaging pada 3000C. Sifat kekerasan pada bahan paduan alumunium mengalami penurunan setelah perlakuan panas sintering-quenching-aging yang ditahan selama 1, 2, dan 3 jam. Terjadi penurunan sebesar 29,7 HV atau 39,92% untuk waktu tahan selama 1 jam, 49,19% untuk waktu tahan selama 2 jam, dan 57,93% untuk waktu tahan selama 3 jam. Perubahan struktur mikro setelah pelakuan panas disebabkan oleh pengkasaran butir yang terjadi pada tiap quenching dimana atom-atom penyusunnya belum sempat menata posisinya dan secara langsung mengakibatkan butirnya menjadi lebih kasar.Kata kunci: sintering, aging, quenching, mikrostruktur, kekerasan.
ANALISA HASIL PRODUK VACUUM FRYING DENGAN SISTEM TORAK Kastiawan, I Made; Ikhwal Gustiar, Franky
MEKANIKA: Jurnal Teknik Mesin Vol 2 No 02 (2016): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Mesin penggoreng (Vacuum Frying) adalah mesin produksi untuk menggoreng berbagai macam buah dan sayuran. Teknik penggorengan nya yaitu menggoreng bahan baku buah-buahan dengan menurunkan tekanan udara pada ruang penggorengan sehingga menurunkan titik didih minyak sayur sampai 80°-90° C. Dengan turunnya titik didih minyak sawit  maka bahan baku yang biasanya mengalami kerusakan pada titik didih normal 160-180 °C bisa di hindari. Yang mana penulis menggambil lingkup permasalahan untuk di bahas yaitu “Analisa hasil produk Vacuum Frying Dengan Sistem Torak”. Semakin tinggi temperatur penggorengan maka semakin rendah pula kadar air keripik apel dan keripik salak dari hasil pengujian alat oven, kadar air tertinggi apel yaitu temperatur 800C dengan nilai 1.57% dan kadar air terendah apel adalah temperatur 880C dengan nilai 0.96% sedangkan kadar air tertinggi salak yaitu temperatur 800C dengan nilai 2.84% dan kadar air terendah apel adalah temperatur 880C dengan nilai 1.26%. Semakin tinggi temperatur penggorengan maka semakin keras tekstur keripik apel dan keripik salak dari hasil pengujian alat penetrometer, kekerasan tekstur tertinggi apel yaitu temperatur 880C dengan nilai 1.8mm dan kekerasan tekstur terendah apel adalah temperatur 800C dengan nilai 2.7mm sedangkan kekerasan tekstur tertinggi salak yaitu temperatur 880C dengan nilai 3.2mm dan kekerasan tekstur terendah salak adalah temperatur 800C dengan nilai 3.8mm. Hasil Perbandingan dari kedua mesin vacuum frying tersebut kekerasan tekstur dan kadar air dengan menggunakan mesin vacuum frying system torak keripik apel tidak renyah di bandingkan dengan keripik apel di pasaran sangat renyah dengan menggunakan mesin vacuum frying jet pump.Kata kunci: Kadar Air, Kekerasan Tekstur, Sistem Torak
ANALISA PENGARUH KEDALAMAN POTONG DAN KECEPATAN POTONG TERHADAP KERATAAN PERMUKAAN BAJA AISI 1045 PADA MESIN BUBUT CNC Sulistyono, Djoko; Anif, Muhammad Nur
MEKANIKA: Jurnal Teknik Mesin Vol 3 No 02 (2017): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

One of the components or parts that are required to have a low surface roughness, namely the shaft. Thus in line with these developments are also components (shaft) or parts produced in CNC lathe machining processes must have a good level of surface roughness. This study aims to determine the effect of depth of cut and cutting speed in the process of material AISI perautan in 1045. The experimental design used is variasi speed cutting with a depth of cut of each tested three times objects. From the analysis of the cutting speed and depth of cut affects the surface flatness surface cutting results where (Ra) is the lowest. In the AISI 1045 material obtained to cutting with cutting speed 93 m/min with a cutting depth of cut 0.1 mm average price obtained for the surface flatness is 1.16 µm. For the depth of cut 0.2 mm average price obtained for the surface flatness is 1.21 µm. For the depth of cut 0.3 mm average price obtained for the surface flatness is 1.31 µm. To cutting with cutting speed 79 m/min with a cutting depth of cut 0.1 mm average price obtained for the surface flatness is 1.23 µm. For the depth of cut 0.2 mm average price obtained for the surface flatness is 1.27 µm. For the depth of cut 0.3 mm average price obtained for the surface flatness is 1.32 µm. To cutting with cutting speed 79 m/min with a cutting depth of cut 0.1 mm average price obtained for the surface flatness is 1.25 µm. For the depth of cut 0.2 mm average price obtained for the surface flatness is 1.28 µm. For the depth of cut 0.3 mm average price obtained for the surface flatness is 1.35 µmKeywords: AISI 1045, Cut Speed, Ingestion thickness, surface flatness

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