Article Per Year (5 Year)
p-Index From 2020 - 2025
2.439
P-Index
This Author published in this journals
All Journal Jurnal Energi Dan Manufaktur Rotasi Jurnal Simetris ROTOR: JURNAL ILMIAH TEKNIK MESIN Indonesian Journal of Science and Technology Journal of Mechanical Engineering Science and Technology STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal Elemen JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri Jurnal Polimesin
Ahmad Syuhri
Staf Pengajar Jurusan Teknik Mesin Fakultas Teknik Universitas Jember
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 31 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 31 Documents
Search

 1   2   3   4 
Analisis Cacat Casting Akibat Variasi Lama Waktu Pengerasan dan Persentase Binder di PT. Barata Indonesia Ramadhanu, Arya; Syuhri, Ahmad; Djumhariyanto, Dwi
ROTOR Vol 7, No 1 (2014)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (146.233 KB)

Abstract

Sand inclusion and pin hole are surface defects caused by molding sand. Therefore need by varying age sand and percentage of binder in sand molds. The purpose of this research to improve the quality of the product. Each treatment will through tensile strength test, then make a plate pattern for casted . Each plate will checked defects that occur, sand inclusion and pin hole . Data from this research will be analyzed using ANOVA factorial design 2x3. The results of this research with a percentage of 1.5% binder and age sand 24 hour produce sand inclusion of 0% and pin hole, 2 holes. Keywords: Sand inclusion, pin hole, binder, age sand
PENGARUH VARIASI WAKTU DAN SUHU TERHADAP KEKUATAN TARIK BELT CONVEYOR (2-PLY 1-STEP) PADA PENYAMBUNGAN SISTEM PANAS Nurman, Ahmad Amril; Syuhri, Ahmad
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.217 KB)

Abstract

Industry of manufacture continued to increase in line with developments in science and technology. Using belt conveyor to transport materials can’t be separated in the industrial world. One of the problems that often occur in conveyor belt is a belt tear or break in the connection. This study aims to determine the best tensile strength in the process of joining belt with hot splicing method, by varying the times (20, 30, 40 minutes) and heating temperature (100, 150, 170 oC) in the process of these connections. The results showed that the best tensile strength is obtained at a temperature of 130 oC and a time of 40 minutes, that is equal to 0.638 MPa.
Analisis Kekuatan Tarik dan Tekan Cetakan Pasir akibat Variasi Ukuran Butir dan Kadar Pengikat Pasir Cetak Devianty, Sella; Syuhri, Ahmad; Arbiantara, Hari
ROTOR Vol 7, No 2 (2014)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (124.328 KB)

Abstract

Molding sand is one the most important thing in sand casting. The weak tensile strength and compressive strength of molding sand causes some defects, such as sand drop and sand inclusion. Therefore this research is done by varying grain size and percentage of binder in molding sand. The purpose of this research was to analyze the tensile strength and the compressive strength of sand mold due to variation of grain size and binder presentation. Each treatment will through tensile strength test and compressive strength test, then the data from the test will be analyzed by using ANOVAfor factorial experiments with SPSS 16.0 and a significance level of 5%. From the research and analysis conducted found that the tensile strength of the molding sand is influenced by the grain size and binder presentation, meanwhile the compressive strength is influenced by the binder presentation but is not affected by the grain size. The highest average value of the sand mold tensile strength is 0.912 N/mm2 and the highest average value of the sand mold compressive strength is 2.7567 N/mm2. Those values are achieved by the use of a mixture of GFN 40-50 AFS silica with a percentage binder as much as 1.5%. Keywords: Molding sand, grain size, binder
The Effect of Particle Dispersion due to Mixing Speed on Spent Coffee Ground Composites Sumarji, Sumarji; Ridha, Fabrobi; Dwilaksana, Dedi; Syuhri, Ahmad; Raihaan, Raihaan
Indonesian Journal of Science and Technology Vol 4, No 2 (2019): IJOST: VOLUME 4, ISSUE 2, 2019
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v4i2.18175

Abstract

Composites using bio-materials with unique properties, such as spent coffee ground were developed for composite fillers. This study was conducted to produce samples under various mixing speed conditions. This study also determined effect of mixing speeds on particle homogeneity as well as composite dispersion in the final product. The composite dispersion was determined by an index based on a standard deviation of free-path spacing of filler particles using a digital microscope. Results showed that when using high-speed mixing, particle tends to agglomerate with particle clumps. We also obtained that faster mixing speed results more homogeneous mixture compared to slower speed. In short, slower speed can reach similar result in homogeneity levels, but it would require longer time for the mixing process.
PENGARUH PENAMBAHAN PHASE CHANGE MATERIAL (PCM) PADA PEMANAS AIR KOLEKTOR TABUNG DILENGKAPI DENGAN REFLEKTOR DOUBLE - U Veni Dwi Sulastri; Hary Sutjahjono; Ahmad Syuhri
Jurnal Energi Dan Manufaktur Vol 12 No 2 (2019)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (347.1 KB) | DOI: 10.24843/JEM.2019.v12.i02.p02

Abstract

Pemanas air energi surya merupakan suatu sistem pemanas air dengan cara kerja menyerap energi radiasi matahari yang kemudian diubah menjadi energi panas dan ditransfer menuju fluida kerja melalui pipa air. Pemanas air ini dibagi menjadi dua yaitu pemanas air kolektor tabung dan pemanas air kolektor plat datar. Dilakukan penelitian dengan menambahkan bahan Phase Change Material (PCM) yaitu sebuah material yang dapat menyimpan energi panas pada pemanas air kolektor tabung dilengkapi dengan reflektor double-U. Variabel pada penelitian ini yaitu pemanas air kolektor tabung tanpa menggunakan PCM dan menggunakan PCM, serta variasi laju aliran massa 0,008 kg/s, 0,010 kg/s, dan 0,030 kg/s. Bahan PCM yang digunakan yaitu campuran parafin 70% dan minyak goreng 30%. Tujuan dari penelitian ini yaitu untuk mengetahui pengaruh penambahan PCM terhadap temperatur air dan efisiensi dari pemanas air kolektor tabung. Hasil dari penelitian menunjukkan bahwa efisiensi tertinggi terjadi pada pemanas air kolektor tabung menggunakan PCM dengan laju aliran massa 0,030 kg/s yaitu sebesar 53,11%. Solar water heater is a system that can absorb solar radiation energy and converted it into heat energy and transferred to the fluid of water pipe. Solar water heaters are divided into two types, that are tube collector water heater and flat plate collector water heater. The study was conducted by adding Phase Change Material (PCM), a material that can store heat energy in the tube collector water heater equipped with a double-U reflector. The variables in this study were tube collector water heaters without using PCM and tube collector water heaters using PCM, as well as variations in mass flow rates of 0.008 kg / s, 0.010 kg / s, and 0.030 kg / s. The PCM material used is 70% of paraffin and 30% of cooking oil. The purpose of this study is to determine the effect of adding PCM to water temperature and efficiency of tube collector water heaters. The results of the study showed that the highest efficiency occurred in tube collector water heaters using PCM with a mass flow rate of 0.030 kg / s which was equal to 53.11%.
ANALISIS MESIN FILLING MINYAK GORENG BERBASIS PLC MENGGUNAKAN METODE PENAKAR DAN TIMER UNTUK MENINGKATKAN EFISIENSI M. Angga Saputra; Ahmad Syuhri; Aris Zainul Muttaqin
ROTOR 2017: ROTOR Special Edition
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (375.14 KB) | DOI: 10.19184/rotor.v0i0.7695

Abstract

Since 2006 Indonesia has become the world's largest producer of Crude Palm Oil. Also, palm oil is a strategic commodity both as food (cooking oil). The need for self-cooking oil every day is increasing, causing businessmen who plunge not only to have significant capital but many from SMEs and MSMEs who start a cooking industry in the home industry. In the home industry for cooking oil packaging, the manual method is still used, which is to drain oil from the reservoir to the package through a pipe that is given a tap to open and close. This study studied PLC-based cooking oil filling machines using a timer and timer method to improve efficiency, charging speed, errors as small as possible and to increase production capacity. The test results showed that the cooking oil filling process using the measuring method had an average of 159,478 (g / dt) with an average oil yield of 689.2 grams with an error rate of 0.23%. While the timer method has an average filling speed of 164.336 (g / dt) with an average oil yield of 692.08 grams with an error of 0.336%. The timer method has a faster-charging speed compared to the measuring process, but for the error rate, the purpose is better than the timer method. This is due to the way of using the rotary encoder sensor when charging, so the time required for charging is a little long but with a small error rate. While the timer method uses a timer sensor that is on the PLC to make charging directly into the bottle but has a more significant error compared to using the measuring process. For engine capacity, it is better to use a timer method that produces 5145 liters/day while the gauge method is only 4984 liters/day. whereas for efficiency, it is better the process of measuring is 99.68%, and the timer method is 99.27% Keywords: Timer Method, Measuring Method, Cooking Oil Filling Machine and PLC
PENGARUH VARIASI WAKTU DAN SUHU TERHADAP KEKUATAN TARIK BELT CONVEYOR (2-PLY 1-STEP) PADA PENYAMBUNGAN SISTEM PANAS Ahmad Amril Nurman; Ahmad Syuhri
ROTOR Vol 8 No 1 (2015)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.217 KB)

Abstract

Industry of manufacture continued to increase in line with developments in science and technology. Using belt conveyor to transport materials can’t be separated in the industrial world. One of the problems that often occur in conveyor belt is a belt tear or break in the connection. This study aims to determine the best tensile strength in the process of joining belt with hot splicing method, by varying the times (20, 30, 40 minutes) and heating temperature (100, 150, 170 oC) in the process of these connections. The results showed that the best tensile strength is obtained at a temperature of 130 oC and a time of 40 minutes, that is equal to 0.638 MPa.
Analisis Kekuatan Tarik dan Tekan Cetakan Pasir akibat Variasi Ukuran Butir dan Kadar Pengikat Pasir Cetak Sella Devianty; Ahmad Syuhri; Hari Arbiantara
ROTOR Vol 7 No 2 (2014)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (124.328 KB)

Abstract

Molding sand is one the most important thing in sand casting. The weak tensile strength and compressive strength of molding sand causes some defects, such as sand drop and sand inclusion. Therefore this research is done by varying grain size and percentage of binder in molding sand. The purpose of this research was to analyze the tensile strength and the compressive strength of sand mold due to variation of grain size and binder presentation. Each treatment will through tensile strength test and compressive strength test, then the data from the test will be analyzed by using ANOVAfor factorial experiments with SPSS 16.0 and a significance level of 5%. From the research and analysis conducted found that the tensile strength of the molding sand is influenced by the grain size and binder presentation, meanwhile the compressive strength is influenced by the binder presentation but is not affected by the grain size. The highest average value of the sand mold tensile strength is 0.912 N/mm2 and the highest average value of the sand mold compressive strength is 2.7567 N/mm2. Those values are achieved by the use of a mixture of GFN 40-50 AFS silica with a percentage binder as much as 1.5%. Keywords: Molding sand, grain size, binder
SIFAT MEKANIK DAN STRUKTUR MIKRO SAMBUNGAN LAS ALUMINIUM 6061 HASIL FRICTION WELDING Hendry Wicaksana; Santoso Mulyadi; Ahmad Syuhri
ROTOR Vol 9 No 1 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.235 KB)

Abstract

The study of the interface mechanical strength of metal alloy friction welded is essential for increasing of the quality of bonding between two materials. In the present study the material is 6061 aluminium alloy and the variation are friction time and chamfer angle. The purpose is to increase the mechanical strength of aluminium 6061 friction welded by combining friction time parameter and chamfer angle. The friction time variations were 60 and 120 second. Whereas the chamfer angles were 0o, 30o, 60o. The joined aluminium then tensile tested, hardness tested and also observed under microscope. The result of mechanical test shows that the variation 30o/120 second give the best result wich the Ultimate Tensile Strength as value as 15.86 N/mm2 and the brinell hardness as value as 92 BHN on Zud areas, 99 BHN on Zpd areas and 91 BHN on Zpl areas. Microstructure observation shows that there were porosity and crack on some testing spesimen.
ANALISIS PARAMETER PEMOTONGAN DAN DEBIT PENDINGIN CNC MILLING TERHADAP KEKASARAN PERMUKAAN MENGGUNAKAN BOX BEHNKEN DESIGN M Yuda Pratama; Ahmad Syuhri; Boy Arief Fachri
ROTOR 2017: ROTOR Special Edition
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (333.665 KB) | DOI: 10.19184/rotor.v0i0.7697

Abstract

In the CNC milling machining process, the surface roughness of the workpiece is one of the most important things. By using the box method, the design method is to find parameters that affect the surface roughness of the workpiece. This study aims to determine the effect of feeding speed, feed depth and cooling discharge on the level of surface roughness. And find out which parameters produce the lowest surface roughness value in the CNC milling machining process. From the results of statistical analysis with a significant level in the amount of α = 5% (0.05) obtained feed speed parameters with a value of P> F = 1.79% and depth of infeed with a value P> F = 0.03% proved to have a significant effect on surface roughness, on the parameters cooling discharge proved not to have a substantial impact in surface roughness with a value of P> F = 5.82%. While the optimum combination for the lowest level of surface roughness can be obtained by a combination of 0.18 mm feed depth parameters, 180 mm / minute feeding speed and 10 ml / second cooling discharge with the lowest surface roughness value of 1.027 µm. Keywords: surface roughness, Behnken design box, CNC milling
Co-Authors ., Sumarji Achmad Fitoyo Agit Yoga Yulio Agus Triono Ahmad Adib Rosyadi Ahmad Amril Nurman Ahmad Amril Nurman, Ahmad Amril Ahmad Ayyub Syaiful Aliyansyah, Berly Andi Sanata Aris Zainul Mutaqien Aris Zainul Mutaqqin Aris Zainul Muttaqin Arya Ramadhanu Arya Ramadhanu, Arya Boy Arief Fachri Cahyono, Hiding Danang Yudistiro Dedi Dwi Laksana Dedi Dwilaksana Deny Setiawan Digdo Listyadi, Digdo Dwi Djumhariyanto Gaguk Jatisukamto Haidzar Nurdiansyah Hari Arbiantara Hari Arbiantara Hari Arbiantara Basuki Hari Arbiantara, Hari Hary Sutjahjono Hendry Wicaksana Indra Surya Iwanata Intan Hardiatama Koekoeh KW, Robertoes Kristianta, FX Lazuardi Rahmadhani Luh Putu Ratna Sundari M Edoward Ramadhan M Yuda Pratama M. Angga Saputra Mahros Darsin Mochamad Edoward Ramadhan Muhammad Abduh Muhammad Ardian Firmansyah Muhammad Dimyati Nashrullah Muhammad Hafri Evan Tofianto Muhammad Trfiananto Muhammad Trifiananto Muhammad Wildan Nashrullah, M Dimyati Nasrul Ilminnafik Noor HS, Skriptyan Prabowo Restu Eranio Prasetio, Dwi Angga Tary Pribadi, Dicki Hendri Raihaan, Raihaan Ridha, Fabrobi Rika Dwi Hidayatul Rika Dwi Qoryah Robertus Sidartawan Rudi Sugara, Imam Santoso Mulyadi Sella Devianty Sella Devianty, Sella Skriptyan Noor HS Skriptyan Syuhri Sujana, I Made Ivan Wiyarta Cakra Sumarji Syahriza, Mochamad Rifki Valerian, Joey Veni Dwi Sulastri Wibowo, Robertoes Koekoeh Koentjoro Widyono Hadi Yohan Rizal Kharisma Yuni Hermawan