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All Journal Rotasi Jurnal Rekayasa Mesin Manutech : Jurnal Teknologi Manufaktur JURNAL CRANKSHAFT Piston: Journal of Technical Engineering Jurnal Engine: Energi, Manufaktur, dan Material SIGMA TEKNIKA Jurnal Ekologi, Masyarakat dan Sains Sylva: Jurnal Ilmu-ilmu Kehutanan International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS)
Deni Mulyana
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Investigasi Efisiensi Propeler Kapal Ikan Tradisional Mulyana, Deni; Jamari, Jamari; Ismail, Rifky
ROTASI Vol 16, No 4 (2014): VOLUME 16, NOMOR 4, OKTOBER 2014
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (748.226 KB) | DOI: 10.14710/rotasi.16.4.28-34

Abstract

Kapal ikan tradisional biasanya dibuat dari kayu dan dengan pola kapal yang diperoleh secara empiris sebagai warisan turun-temurun tanpa diketahui nilai hambatan kapalnya. Adapun sistem propulsi kapal ikan tradisional saat ini biasanya menggunakan propeler sebagai pendorong kapal. Pemilihan propeler biasanya hanya berdasarkan kesediaan di pasaran dan kecocokan dengan shaft kapal yang dipakai, tanpa memperhatikan faktor hambatan kapal sebagai pertimbangan pemilihan propeler. Penelitian ini bertujuan untuk menginvestigasi nilai hambatan kapal ikan tradisional serta mengetahui kinerja propeler yang terpasang sehingga dapat diketahui apakah pemilihan propeler kapal yang terpasang di kapal sudah baik atau tidak. Jenis kapal ikan yang diteliti adalah kapal ikan jenis purse seine di perairan Tegal. Pengambilan data mencakup ukuran utama kapal serta ukuran utama propeler yang terpasang. Kemudian dilakukan pemodelan kapal, estimasi hambatan kapal, dan estimasi efisiensi propeler yang terpasang pada kapal dengan mengasumsikan bahwa propeler kapal merupakan tipe B-series. Efisiensi open water propeler terpasang akan dibandingkan dengan efisiensi open water propeler yang dirancang dengan menggunakan perangkat lunak. Dari pengolahan data didapatkan bahwa nilai hambatan kapal diprediksi sebesar 3.08 kN pada kecepatan kapal 7 knot. Efisiensi open water propeler terpasang sebesar 0.478 sedangkan propeler hasil perhitungan perangkat lunak mempunyai efisiensi open water sebesar 0.546. Ini menunjukkan bahwa pemilihan propeler yang terpasang pada kapal ikan tradisional yang diteliti masih kurang baik
WATERBIRD POPULATION ANALYSIS ON THE BANYUASIN PENINSULA SPTN REGION II REGION BERBAK AND SEMBILANG NATIONAL PARKS, BANYUASIN REGENCY Mulyana, Deni; Aluyah, Cik; Heptiana, Erta
Sylva : Jurnal Penelitian Ilmu-Ilmu Kehutanan Vol 10, No 2 (2021)
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/sylva.v10i2.3946

Abstract

Waterbirds are migratory birds with the largest number in the world who always migrate to a place/region.. This study aims to determine the types and population of migratory and residents waterbirds(waders)  on the Semenanjung Banyuasin SPTN region II Berbak and Sembilang National Parks, Kabupaten Banyuasin This study uses the Point Transect method, the number of bird populations is recorded directly and through estimates using the Block method. Based on observations, it was found that there were 3.743 water birds consisting of 3.240 migrant species and 503 resident species. From this number, after being identified, it is known that there are 20 species of migratory waterbirds and 11 species of resident waterbirds.
Optimization of Cutting Parameter CNC Wet Milling Process of Austenitic Stainless Steel on Surface Roughness Hata, Achmad; Widiatmoko, Rudy Yuni; Mulyana, Deni; Azmy, Ilham
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 7 No. 2 (2023)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v7i2.1591

Abstract

Austenitic stainless steel (SS) is widely used in various industries owing to its good mechanical properties and corrosion resistance. However, the machineability of this material remains a challenge to measure for better application. In this research, the optimization of the machining parameter CNC wet milling process for austenitic stainless steels (AISI 304 and AISI 316) was successfully finished by utilizing the Taguchi method (S/N ratio and ANOVA) to determine its machineability specifically on surface roughness. The optimum surface roughness of AISI 304 stainless steel is about 0,21 µm within a spindle speed of 3184 rpm, a feed rate of 1528,4 mm/min in the depth of 0,3 mm. The depth of cut parameter during CNC milling was considered as the most influential parameter to optimize surface roughness in AISI 304 stainless steel. Meanwhile, during the cutting process of AISI 316 stainless steel, the optimum surface roughness was obtained at a spindle speed of 3184 rpm, feed rate of 541,4 mm/min in the depth of 0,3 mm with a surface roughness value of 0,24 µm. The results depicted that feed rate held a pivotal factor in determining surface roughness in the AISI 316 stainless steel milling process. Therefore, this research gives impactful insight into developing a good milling process that can increase the machineability, quality, and productivity of AISI 304 and AISI 316 stainless steels.
Optimization of Machining Parameters CNC Milling Process of Austenitic and Martensitic Stainless Steels on Surface Roughness Mulyana, Deni; Yahya, Thoriq Zulham; Hata, Achmad; Widiatmoko, Rudy Yuni; Azmy, Ilham
International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Vol. 2 No. 2 (2024): IJMEAS - May
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijmeas.v2i2.244

Abstract

Stainless steel (SS), specifically AISI 304 and 420, was classified as austenitic and martensitic stainless steels which garnered excellent corrosion resistance (up to 650 oC) and easily to enhance mechanical properties by heat treatment. However, the machinability of these materials has not been widely studied. CNC milling process was defined as cutting process of workpiece using a rotating cutting tool which considered to improve productivity in manufacture industries. Machining parameters during CNC milling process such as cutting speed, feed rate, and depth of cut play an important role to achieve desired product with high quality. In addition, surface roughness was evaluated as pivotal factor to analyze resulted machining products of workpiece which subsequently used for direct application in vary industries. In order to study machinability of AISI 304 and 420 stainless steels, the optimization of machining parameters during CNC milling process was performed to determine their surface roughness values. The research data were analyzed by using Taguchi statistical method of S/N ratio and ANOVA. Furthermore, the results show that significant influence of machining parameters on AISI 304 austenitic stainless steel was feed rate of 82,29 %, then spindle speed of 3,75 % and depth of cut 0,63 %. Besides, for AISI 420 martensitic stainless steel, the feed rate still remains important in machining parameters of 72,93 %, then depth of cut 14.98% and spindle speed of 8.09 %. Thus, the result of this research endows more insights to know the machineability of AISI 304 and AISI 420 stainless steels.
Uji Perbandingan Aktivitas Ekstrak Kering Buah Asam Jawa (Tamarindus Indica L) dengan dan tanpa Kombinasi dengan Ekstrak Cair Daun Stevia  (Stevia Rebaudiana B) terhadap Kadar Glukosa Darah Mencit Jantan (Mus Musculus) yang Diinduksi Aloksan Mercya, Yovita; Mulyana, Deni
Jurnal Ekologi, Masyarakat dan Sains Vol 6 No 1 (2025): Jan-Jun 2025
Publisher : ECOTAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55448/1953kj79

Abstract

Diabetes mellitus is a disorder that causes hyperglycemia due to insulin deficiency. Tamarind fruit is known to treat diabetes but the sour of tamarind fruit is often covered with sweeteners to improve the taste. This experimental study was conducted to compare the activity of  tamarind fruit with and without combination with stevia leaf liquid extract on blood glucose levels in male mice that had been induced by alloxan. After confirming that the mice's glucose levels were >200 mg/dl, 3 groups were tested, namely the test group 1 was given a solution of dry tamarind fruit extract, the test group 2 was given a combination of tamarind fruit extract solution and stevia leaf liquid extract, and the control group was given aqua distillate. The results of the paired t test against the test group 1 resulted in a decrease in blood glucose of 66.37% with p=0.00013 while the test group 2 was 35.35% with p=0.00035,  which means there is difference before and after treatment. Meanwhile, to see the difference in the decrease in blood glucose levels between groups, an independent t test was performed and obtained p=0.000002 which means that there is a significant difference in each test group.
Pembuatan dan Pengujian Mekanik hasil Sambungan Las Pipa ASS 316L Menggunakan Proses GTAW Riswanda, Riswanda; Wahyudin, Faris Khoiri; Sugianto, Sugianto; Mulyana, Deni; Saragih, Albert Daniel
Manutech : Jurnal Teknologi Manufaktur Vol. 17 No. 01 (2025): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v17i01.475

Abstract

Gas tungsten arc welding (GTAW) is a welding process that is widely used for stainless steel materials, especially material thicknesses below 3 mm. In this study, ASS 316L pipes with a diameter of 89 mm, a thickness of 2.6 mm, and a length of 100 mm using a current of 50A was successful prepared. The type of welding wire used is ER316L with a diameter of 1.6 mm and argon as a shielding gas with using a backing gas. The results of macrograph observations showed that the face tended to be concave and the root experienced over penetration. This was correlated with the results of visual observations, including the face in the weld metal area being lower than the base metal and the root being too deep. The highest average tensile test result is 659 MPa, with a yield strength of 484 MPa, while the elongation is 39.3%, then the fracture form occurs minimal necking or brittle fracture occurs. The highest average hardness test result in the WM area is 188 HV, followed by the HAZ area with an average hardness of 154 HV and in the WM area an average hardness of 148 HV.
Pengaruh Jenis Oli Pelumas terhadap Laju Keausan pada Kontak Dua Jenis Material Londa, Petrus; Mulyana, Deni; Widiatmoko, Rudy Y.; Bintoro, Waluyo M.; Hore, Duran
Jurnal Rekayasa Mesin Vol. 18 No. 3 (2023): Volume 18, Nomor 3, Desember 2023
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v18i3.4438

Abstract

Penelitian ini dirancang untuk mengevaluasi kualitas oli pelumas sepeda motor dalam mengatasi gesekan dan keausan yang terjadi. Banyak merek dagang oli pelumas yang ada di pasaran dengan berbagai standard seperti SAE, JASO dan API yang bertujuan untuk melumasi bagian dalam mesin sepeda motor. Oleh sebab itu mengetahui kualitas oli pelumas yang digunakan adalah hal yang sangat penting. Penelitian ini menggunakan metode pin-on ring tribo tester. Efek dari pelumasan dan jumlah beban yang diberikan menjadi fokus dalam penelitian ini. Material yang digunakan dalam pengujian adalah aluminium sebagai bahan pin dan besi cor digunakan sebagai bahan ring. Sedangkan oli pelumas dari SAE10W40, SAE20W50 untuk gesekan tinggi dan SAE10W30, SAE20W40 untuk gesekan rendah. Prosedur pengujian dikondisikan pada constant load dan increment load dalam durasi waktu 120 menit. Hasil dari tribological test ini dibandingkan dengan stribeck curve dan keausan pin serta koefisien gesek ditampilkan dalam bentuk grafik.  Kata kunci: keausan; pelumas; sepeda motor; standard oli; tribo tester.
The Analysis of Current Variations on Mechanical Properties and Microstructure of ASS 316L Welded Joints by TIG Welding Riswanda; Wahyudin, Faris Khoiri; Azmy, Ilham; Mulyana, Deni; Saragih, Albert Daniel
Piston: Journal of Technical Engineering Vol. 8 No. 2 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i2.48941

Abstract

Stainless steel 316L pipe welding joints are widely used in industry, especially in the Bio-Medical field. In order to develop research on this field, the Gas Tungsten Arc Welding (GTAW) process was carried out on the butt joint of ASS 316L. In this study, the ASS 316L pipe of 89 mm (3.5 inches), a thickness of 2.6 mm, and a length of 100 mm was investigated. The effect of current variations of 30, 40, and 50A with shielding gas and Argon backing gas were analyzed. ER316L have been selected as filler metal for GTAW process. The results of microstructural observations for all currents showed the formation of dendritic and widmanstanten structures in the weld metal and austenitic phases in the base metal. The mechanical tests has been conducted to find out the ultimate tensile strength and and hardness as well as observations of the macro structure in the weld metal (WM), heat affected zone (HAZ), and base metal (BM) areas. Visual observation of the 40A current showed more stable surface and penetration results compared to the 30 and 50A currents. Observations of the macro structure were correlated with the results of visual observations of the 40A current, indicating good fusion and no defects exceeding the standard. The highest tensile strength test results were obtained in specimens with a current of 50A of 659 MPa, followed by a current of 40A of 651 MPa, and a current of 30A of 649.3 MPa. However, the highest elongation was found in specimens with a current of 40A, which was 45.3%, while specimens with currents of 30A and 50A had the same elongation value of 39.3%. The general distribution of hardness in the weld metal area was greater than in the heat affected zone and base metal areas.
REKAYASA ULANG MESIN MILLING CNC EMCO TU-3A UNTUK MENDUKUNG TEKNOLOGI CAM Zainuddin, Zainuddin; Widiantoro, Heri; Mulyana, Deni; Triyono, Budi; Ardiansyah, Muhammad Rizal
JURNAL CRANKSHAFT Vol 7, No 1 (2024): Jurnal Crankshaft Vol.7 No.1 (2024)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/crankshaft.v7i1.11846

Abstract

Mesin perkakas CNC (Computer Numerically Controlled) merupakan alat yang sangat penting dan banyak digunakan dalam proses manufaktur produk. Mesin perkakas CNC adalah suatu mesin perkakas yang dikendalikan oleh komputer menggunakan kode angka dan huruf sehingga secara otomatis menjalankan operasi pemesinan sesuai dengan perintah yang tersusun dalam kode-kode tersebut. Jika dibandingkan dengan mesin perkakas konvensional yang setaraf dan sejenis, mesin perkakas CNC lebih unggul baik dari segi ketelitian, ketepatan, fleksibilitas, dan kapasitas produksi. Salah satu mesin CNC yang banyak digunakan di Indonesia adalah Mesin Milling CNC EMCO TU-3A buatan EMCO Austria. Mesin ini biasanya digunakan oleh institusi pendidikan untuk mendukung praktikum. Namun, karena teknologi yang sudah tidak kompatibel (tidak mendukung teknologi CAM - Computer Aided Manufacturing) dan tidak sesuai dengan standar industri, mesin ini sudah jarang digunakan lagi. Bahkan pada beberapa institusi, mesin ini hanya tersimpan di gudang atau dibuang begitu saja. Hal ini tentu menyebabkan kerugian bagi institusi tersebut. Oleh karena itu, diperlukan solusi untuk menyelesaikan permasalahan tersebut. Salah satunya adalah dengan merekayasa ulang mesin tersebut dengan spesifikasi yang lebih baik serta kompatibel dengan teknologi saat ini, yaitu teknologi CAM. CAM merupakan teknologi komputer yang mengubah desain tiga dimensi pada komputer menjadi gerak operasi sebuah mesin sehingga dapat menghasilkan benda yang sesuai dengan desain. Proses ini melibatkan dua tahapan, yakni: mengubah desain tiga dimensi menjadi kode yang dipahami oleh mesin, kemudian mengontrol mesin berdasarkan kode tersebut. Penelitian ini menghasilkan mesin Milling CNC yang memiliki kemampuan ketelitian operasi 0.005 mm dengan mengintegrasikan prototipe kontrol dengan teknologi CAM ke dalam mesin.
Pengaruh Proses Milling Muka Pada Kondisi Basah Dan Kering Untuk Baja Amutit Terhadap Kekasaran Permukaan Widiatmoko, Rudy Yuni; Bintoro, Waluyo Musiono; Hata, Achmad; Mulyana, Deni; Azmy, Ilham
SIGMA TEKNIKA Vol 8, No 2 (2025): SIGMATEKNIKA, VOL. 8, N0. 2, NOVEMBER 2025
Publisher : Fakultas Teknik, Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/sigmateknika.v8i2.8365

Abstract

Proses milling muka pada pemotongan logam merupakan aktivitas penting dalam industri manufaktur untuk dapat menghasilkan suatu produk. Salah satu parameter dari hasil proses tersebut adalah kekasaran permukaan yang berperan penting pada umur pakai komponen mekanik. Di sisi lain, baja amutit dengan standar AISI O1 banyak dimanfaatkan sebagai komponen mekanik untuk punch dan dies karena sifat mampu mesinnya yang sangat baik. Maka, pada penelitian ini dilakukan penerapan variasi parameter selama proses milling muka dalam kondisi basah dan kering pada mesin Computer Numerical Control (CNC) untuk menghasilkan komponen mekanik baja amutit dengan kekasaran yang lebih baik. Parameter yang dipilih pada prosesnya meliputi putaran spindel, kecepatan pemakanan, dan kedalaman pemakanan. Proses milling muka dilakukan pada beberapa spesimen baja amutit menggunakan insert carbide cutter pada kondisi yang berbeda. Selanjutnya, data kekasaran permukaan (Ra) dievaluasi menggunakan metode signal-to-noise ratio (SNR) dan analysis of variance (ANOVA). Hasil pemotongan proses milling muka baja amutit dalam kondisi basah dan kering memiliki perbedaan nilai kekasaran permukaan. Adapun parameter pemotongan yang berperan besar dalam menghasilkan nilai kekasaran permukaan optimum antara lain spindle speed pada 2250 rpm, feed rate 180 mm/menit dan kondisi basah. Dengan demikian, proses milling muka basah pada baja amutit dengan penerapan parameter tersebut dapat menciptakan kualitas produk yang tinggi dan ekonomis.
Co-Authors Aluyah, Cik Bintoro, Waluyo M. Bintoro, Waluyo Musiono Budi Triyono Hata, Achmad Heptiana, Erta Heri Widiantoro Hore, Duran Ilham Azmy J. Jamari Muhammad Rizal Ardiansyah, Muhammad Rizal Petrus Londa Rifky Ismail Riswanda Saragih, Albert Daniel Sugianto Sugianto Wahyudin, Faris Khoiri Widiatmoko, Rudy Y. Widiatmoko, Rudy Yuni Yahya, Thoriq Zulham Yovita Mercya Zainuddin, Zainuddin