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Padang Yanuar
Jurusan Magister Teknik Mesin Fakultas Teknik UNDIP Jl. Prof. Sudharto SH Kampus Undip Tembalang Semarang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation

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RANCANG BANGUN ALAT CETAK PLASTIK VAKUM UNTUK MENURUNKAN PROSENTASE CACAT PRODUK DI LABORATORIUM METROLOGI DAN CETAK PLASTIK Nailul Ulum, Muhammad Showi; Harmanto, Sri; Satito, Aryo; Yanuar, Padang; Hamid, Abdul; Iyadul, Fatih
Journal of Mechanical Engineering and Applied Technology Vol. 2 No. 3 (2024): VOLUME 2 ISSUE 3 YEAR 2024 (NOVEMBER 2024)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v2i3.6074

Abstract

AbstrakVacum Forming is process packaging in industrial, wich one deformation of plastic and formed on mold with difference preassure. In food and drinking industrial show positive progress and make bigger contribution for economic grow in Indonesia. At this moment Vacum Forming industrial in Indonesia is just owned big industrial wich have good purchasing power tools in range hundreds of million to billions of rupiah. Metrologi dan Cetak Plastik laboratory in Teknik Mesin Politeknik Negeri Semarang one of the topics is Vacum Forming. Equipment Used is very simple, manny time try and erors needed for have good product without any defects by way temperature varible, pressure, warm-up time and forging. The most difficult is warm-up process where must tu set the hight temperature waring and gap between the material and the heater. The purpose of the research is to know the influence of warming temperatures, time of warming, thick of plastic and pressure on the quality, The result of this research the best variable is time for warm-up 135 second, time of forging 40 second. Ticknes variable is 0,5 mm, 0,3 mm and 0,25mm, the best ticknes of plastic is 0,25 mm.
SOSIALISASI DAN PEMETAAN POTENSI BIOGAS BERBAHAN DASAR LIMBAH KOTORAN SAPI DI KELOMPOK TANI SUMBER REJEKI KOTA SEMARANG Apriandi, Nanang; Kristiawan, Timotius Anggit; Yanuar, Padang; Satito, Aryo; Setiyawan, Trio; Raharjanti, Rani
Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Vol. 4 No. 2 (2023): Vol. 4 No. 2 Oktober 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/sitechmas.v4i2.4986

Abstract

Kegiatan sosialisasi dan pemetaan potensi pemanfaatan kembali limbah kotoran sapi yang dikonversi menjadi biogas pada Kelompok Tani Sumber Rejeki, Kota Semarang, selaku mitra kegiatan, sudah dilakukan. Metode kegiatan yang digunanakan adalah pendekatan Focus Group Discussion (FGD) dan Participatory Rural Appraisal (PRA) dengan menitikberatkan pada keterlibatan mitra. Hasilnya, potensi limbah dari kegiatan peternakan pada kelompok mitra dengan rata-rata jumlah ternak yang dimiliki sebanyak 14 ekor sapi dewasa, dapat menghasilkan 406 kg kotoran per hari dengan potensi slurry sebagai bahan baku utama pembuatan biogas sebesar 812 kg/hari. Kapasitas digester yang dibutuhkan untuk memaksimalkan potensi slurry tersebut adalah sebesar 15 m3 dengan potensi biogas yang dihasilkan sebesar 12,789 m3/hari. Desain digester yang ditawarkan kepada mitra yaitu sistem pengolahan yang terintegrasi yang mengadopsi dari Program Biogas Rumah (BIRU) dengan beberapa modifikasi yang mengintegrasikan proses pembuatan biogas dengan pembuatan puouk kompos.
PENERAPAN TEKNOLOGI SISTEM INFORMASI UNTUK MENINGKATKAN PRODUKTIVITAS PACKING LIST PADA GUDANG LOGISTIK CV KAROSERI LAKSANA Khoryanton, Ampala; Anggit, Timotius; Alfauzi, Abdul Syukur; Satito, Aryo; Tristidjanto, Hery; Sriharmanto, Sriharmanto; Abidin, Zaenal; Yanuar, Padang; Putri, Farika Tono; Nugroho, Wahyu Isti; Ayu S, Friska; Supandi, Supandi; Andreyanto W, Mirda
Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Vol. 6 No. 1 (2025): Vol. 6 No. 1 April 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/sitechmas.v6i1.5167

Abstract

CV Karoseri Laksana merupakan perusahaan karoseri bus. Konsumennya meliputi Operator lokal bus kota, Operator bus antarkota lokal, Operator bus wisatawan, dan perusahaan asing. Berdasarkan hasil observasi yang dilakukan ditemukan beberapa permasalahan yang dihadapi oleh Mitra CV Karoseri Laksana, yaitu: (1) Proses pengarsipan dan pencarian barang di gudang Logistik masih dilakukan secara manual sehingga terjadinya Down Time yang berakibat tidak tercapainya target produksi Packing List, (2) karyawan belum mengetahui pentingnya penerapan Internet of Thinks (IoT) dan Artificial Intelegent (AI) (3) Mitra masih melakukan pengarsipan pada buku catatan yang berpotensi hilang maupun rusak dan menumpuk karena keterbatasan lembar halaman pada buku. Metode yang digunakan adalah: (1) Membuat alat bantu sistem informasi berbasis IoT sebagai alat bantu pengarsipan dan pencarian barang pada gudang yang memiliki banyak barang, (2) Pelatihan pengoperasian alat bantu sistem informasi kepada operator gudang, (3) Pelatihan dalam bidang manajemen pengarsipan, pencarian dan pendataan.
Penerapan Teknologi Pengaduk Slurry Pada Bak Pengaduk Masuk Digester Tipe Kontinyu Di Kelompok Tani Sumber Rejeki Sebagai Penunjang Produksi Biogas Kristiawan, Timotius Anggit; Setiyawan, Trio; Yanuar, Padang; Janitra, Atikah Ayu; Apriandi, Nanang; Nizami, Avicenna An; Widodo, Ignatius Gunawan
Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Vol. 6 No. 1 (2025): Vol. 6 No. 1 April 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/sitechmas.v6i1.6025

Abstract

Penerapan teknologi pengaduk slurry pada bak masukkan bigester biogas milik Kelompok Tani Sumber Rejeki, Kota Semarang selaku mitra pengabdian masyarakat telah dilakukan. Pentingnya treatment awal kotoran sapi sebelum dimasukkan ke dalam bigester diharapkan dapat meningkatkan produksi biogas. Metode yang digunakan pada penelitian yaitu metode partisipatif dengan melibatkan satu kelompok mitra, dimulai   tahap   perencanaan,   pelaksanaan   program,   pendampingan maupun evaluasi kegiatan mitra. Hasil dari kegiatan pengabdian ini berupa terealisasinya penerapan Teknologi tepat Guna (TTG) yaitu Alat Pengaduk Slurry dengan penggerak motor listrik 0,5 Hp pada bigester biogas milik kelompok tani. Dampak yang dirasakan kelompok tani setelah penggunaan alat pengaduk yaitu kemudahan proses pengadukan kotoran sapi dengan campurannya dimana menyingkat waktu treatment awal dari ± 30 menit menjadi ± 5 menit sekali proses pengadukan serta proses dorong slurry masuk ke bigester terjadi saat proses pengaduk.
Rancang Bangun Autofeeder O-Ring Berbasis Electropneumatic Guna Menurunkan Cycle Time Penyuplaian O-Ring Pada Proses Nut Push Press Line Wiper Assy Tristijanto, Hery; Nugroho, Wahyu Isti; Farhan, Muchamad; Yanuar, Padang
Jurnal Rekayasa Mesin Vol. 19 No. 3 (2024): Volume 19, Nomor 3, Desember 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i3.4967

Abstract

Permasalahan yang ditemukan pada sub line wiper assy yaitu pada proses nut push press terdapat komponen tambahan berupa o-ring, setiap proses nut push press membutuhkan 4 buah o-ring. Kapasitas batang suplai o-ring yang terbatas mengakibatkan perlu adanya pengisian secara berulang pada batang suplai o-ring, pengisian o-ring ini dilakukan oleh operator feeder secara manual. Dampak dari masalah tersebut yaitu waktu penyuplaian o-ring kurang efektif, berdasarkan permasalahan yang ada maka dibutuhkan alat yang digunakan untuk menyuplai o-ring secara cepat. Tujuan penelitian ini yaitu mengurangi waktu proses penyuplaian o-ring dengan membuat rancang bangun autofeeder part o-ring dengan sistem penggerak pneumatik. Metode penelitian meliputi identifikasi masalah, studi pustaka, perancangan, pembuatan dengan pemilihan komponen dan pengerjaan alat, serta pengujian. Hasil dari autofeeder part o-ring yakni mempermudah dan mempercepat proses penyuplaian o-ring. Menurunkan cycle time penyuplaian o-ring dari 83,9 detik menjadi 38,6 detik atau berkurang 53,9% dan waktu proses pengisian o-ring dapat dikurangi dari 31,8 detik menjadi 17,7 detik
PENGARUH PERTAMBAHAN TIB PADA KOMPOSIT AL7SI–SIC TERHADAP STRUKTUR MIKRO Hermawati, Lilin; Mujiarto, Iman; Yanuar, Padang
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol 10, No 1 (2019): JURNAL SIMETRIS VOLUME 10 NO 1 TAHUN 2019
Publisher : Fakultas Teknik Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.358 KB) | DOI: 10.24176/simet.v10i1.2768

Abstract

Metal Matrix Composite Method (MMC) menjadi bahan pertimbangan setiap peneliti dalam melakukan pengecoran. Atau sering disebut dengan pencampuran matrik paduan dan matrik murni untuk menghasilkan bahan campuran yang lebih baik. Sifat aluminium yang ringan, tahan terhadap korosi serta mudah dibentuk, aluminium banyak dipergunakan untuk beberapa penelitian dan produksi, namun dari beberapa proses pengecoran banyak sekali kendala untuk pencampuran matrik Al dan beberapa matrik lainnya. Maka dalam penelitian ini penulis mencoba dengan Proses Stir Casting agar mendapat hasil yang homogen dalam pencampuran SiC dengan komposit Al7Si dengan diberi serbuk SiC dengan penambahan 5%, 7,5% dan 10% sebagai penguat. Serbuk SiC mempunyai sifat yang tidak homogen dengan permukaan SiC yang tidak bisa membasahi oleh matrik cair. Selain SiC sebagai penguat pada penelitian ini juga menambahkan TiB 1% yang berfungsi penghalus butir. Dari penelitian ini penulis melakukan beberapa pengujian untuk mengetahui hasil dari pencampuran matrik yang ada. Pengujian yang dilakukan stru ktur mikro, densitas, kekerasan dan potensial.
Solar radiation monitoring system for electric vehicle charging using solar modules based on the Internet of Things Herlambang, Yusuf Dewantoro; Huda, Muhamad Nurul; Antoro, Daffa Yudha Akbar Putra; Ghozali, Hanif Faizal; Setyawan, Martando Robby; Apriandi, Nanang Apriandi; An-Nizhami, Avicenna; Yanuar, Padang; Riadini, Elfrida Rizky; Marliyati, Marliyati
Journal of Mechanical Engineering and Fabrication Vol. 2 No. 1 (2025): Maret
Publisher : Journal of Mechafa Engineering and Fabrication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64273/jmef.v2i1.17

Abstract

The utilization of solar energy to support electric vehicle charging still faces challenges related to efficiency and real-time solar radiation monitoring. Addressing this issue is critical given the importance of optimizing renewable energy to facilitate the transition toward sustainable transportation. This study offers a solution through the development of an Internet of Things (IoT)--based solar radiation monitoring system capable of measuring solar light intensity in real time. The system employs a BH1750 sensor integrated with an ESP32 microcontroller to process data, transmit it to the Firebase Realtime Database, and display it via an Android application. The methodology encompasses the design, implementation, and testing of the system on an electric vehicle placed in an open area for 10 hours of observation. Results indicate that the highest light intensity, recorded at 98,321 lux, corresponded to solar radiation of 776.74 W/m², while the lowest light intensity, 69 lux, resulted in radiation of 0.55 W/m². The implications of this research include enhanced efficiency in electric vehicle charging, the advancement of IoT-based solar energy systems, and the potential integration with energy storage technologies and predictive algorithms to improve energy sustainability.
Performance Analysis of Tray Dryer to Reduce the Drying Process Time of Cayenne Pepper khoryanton, Ampala; Yanuar, Padang; Saputro, Raynaldi; Supandi, Supandi
Eksergi Vol. 18 No. 3 (2022): SEPTEMBER 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v18i3.3764

Abstract

Chili is a type of vegetable that is easily damaged and difficult to maintain in fresh form. The durability of fresh chilies if stored at low temperatures can last up to 14 days, but if stored at room temperature chilies only last about 2-4 days. Because of this, chili prices are always erratic, when chili prices are low, farmers will overcome losses by drying chilies using natural methods of sunlight. This method is considered less effective because it requires a large drying area and relatively long drying time. Therefore, it is necessary to manufacture and test chili drying ovens to speed up the drying process time and increase the durability of chilies. This research method focuses on the process of testing the performance of the drying oven. The test parameter used is using temperature of 70℃ with 3 variations of drying process time, namely 6 hours, 7 hours, and 8 hours to produce dry chili water content according to the standard, which is a maximum of 11%. The results of the chili drying oven research are the best drying time for 8 hours with a temperature of 70℃ which produces a water content of 9.33% cayenne pepper. In addition, the drying oven testing process resulted in a drying efficiency of 35.4%.
Mass Ratio Influence on Vortex-Induced Vibration of a Flexible Cylinder using Large Eddy Simulation at Re=1000 An-Nizhami, Avicenna; Apriandi, Nanang; Setiawan, Trio; Kristiawan, Timotius Anggit; Riadini, Elfrida Rizky; Janitra, Atikah Ayu; Yanuar, Padang
Journal of Mechanical Engineering and Applied Technology Vol. 2 No. 1 (2024): VOLUME 2 ISSUE 1 YEAR 2024 (MARCH 2024)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v2i1.5498

Abstract

The study investigates the phenomenon of vortex-induced vibration (VIV) using Large Eddy Simulation (LES) at a Reynolds number of 1000, focusing on transitional flow conditions. LES has proven effective in understanding VIV across Reynolds number regimes, aiding in comprehending flow physics and mechanisms behind VIV. The research aims to contribute data for validating numerical models and informing engineering practices. The study employs the Navier-Stokes equation and the continuity equation to analyze fluid flow, treating it as incompressible due to negligible density changes. The three-dimensional incompressible momentum equation is discretized using the finite volume method within the spatial domain. Resolution of the pressure Poisson equation ensures compliance with free divergence conditions, enhancing computational fluid dynamics simulations' reliability. Validation of the fluid flow solver involves comparing computed drag force coefficients with established benchmarks, showing agreement within small discrepancies. The study delves into vibration behavior induced by cross flow at various reduced velocities (), noting distinct patterns ranging from irregularities at low  to quasi-periodic behavior at higher values. Analysis of maximum cylinder displacement () across different reduced velocities and mass ratios underscores the complex relationship between system parameters and displacement dynamics. A consistent occurrence of y_max at a specific reduced velocity highlights its significance, while varying mass ratios affect displacement patterns, indicating the importance of understanding these dynamics for optimizing fluid-structure interaction systems.
Optimization of soldering quality using poka-yoke and camera-based inspection to prevent incomplete production cycle: a case study in automotive stator assembly Khoryanton, Ampala; Yanuar, Padang; Aditya, Dwiky Septian; Mujiarto, Iman; Tristijanto, Hery; Alfauzi, Abdul Syukur; Sunarto, Sunarto; Sriyanto, Nanang Budi
Jurnal Polimesin Vol 23, No 4 (2025): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i4.7203

Abstract

This study was conducted at a manufacturing company located in Indonesia that produces Alternating Current Generator Starters (ACGS). In the ACGS production process, there is a solder inspection stage that was previously performed manually by operators. The main issue encountered is incomplete production cycles, a condition where a production cycle is not fully completed, but the product continues to the next stage, increasing the risk of undetected defective or rejected products. Research aims to design a camera check system that integrates the Poka-Yoke method to enhance accuracy and prevent errors caused by human factors based on continuous improvement through the Plan, Do, Check, Action (PDCA) cycle. This study compares two camera inspection programs: program model 1, with individual position calibration per solder point, and program model 2, with a shared calibration setup, to evaluate inspection effectiveness. The quantitative comparative testing results show a detection accuracy of up to 99.92% and an inspection result classification accuracy reached 99.73%, indicating a significant improvement in the reliability of the visual inspection system and quality assurance for soldering results in industry.
Co-Authors Abdul Hamid Aditya, Dwiky Septian Agus Pramono Ahmad Mamba'udin Alfauzi, Abdul Syukur Alisyafa’at, Ahmad Dhimas Aminuyati Amran Yobioktabera An Nizhami, Avicenna Andreyanto W, Mirda Anggit Kristiawan, Timotius Anggit, Timotius Antoro, Daffa Yudha Akbar Putra Apriandi, Nanang Apriandi Ardjo, Anwar Sukito Aulia, Nur Fatowil Ayu S, Friska Budhi Prasetiyo Dwiana Hendrawati Elfrida Rizky Riadini Farhan, Muchamad Fitrianti Sugiono, Friska Ayu Ghozali, Hanif Faizal Hartono Hartono Hery Tristijanto Huda, Muhamad Nurul iman, Mujiarto Isti Nugroho, Wahyu Iyadul, Fatih Janitra, Atikah Ayu Khoryanton, Ampala Lathief, Muttabik Fathul Lilin Hermawati Mahendra, Tegar Aprilio Mamba'udin, Ahmad Marliyati Marliyati, Marliyati Mulyono Mulyono Nailul Ulum, Muhammad Showi Nanang Apriandi Nanang Budi Sriyanto Nizami, Avicenna An Oktariza, Gio Prasetyo, Anoeng Prihatmini, Eri Purnomo, Adhy Putri, Farika Tono Rani Raharjanti Rizky Riadini, Elfrida Safriana, Eni Saputro, Raynaldi Satito, Aryo Satya, Evan Bagas Setiawan, Trio Setiyawan, Trio Setyawan, Martando Robby Setyawan, Trio Slamet Priyoatmojo, Slamet Sri Harmanto Sriharmanto, Sriharmanto Sugiono, Friska Ayu Fitriani Sunarto Sunarto Supandi Suwarti Suwarti Suyanto Suyanto Syukur Alfauzi, Abdul Tengku Riza Zarzani N Timotius Anggit Kristiawan Tono Putri, Farika Tristidjanto, Hery Wahyono Wahyono Wahyu Isti Nugroho Widodo, Ignatius Gunawan wirawan, yuris Wiwik Purwati Widyaningsih yatimah, Dhurotul Yoeli Janto, Yoeli Yuris Bahadur Wirawan, Yuris Bahadur Yusuf Dewantoro Herlambang Zaenal Abidin