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JTTM: Jurnal Terapan Teknik Mesin
Published by Sekolah Tinggi Teknologi Muhammadiyah Cileungsi
ISSN : 27215377     EISSN : 27217825     DOI : https://doi.org/10.37373/msn.v1i2.49
Core Subject : Engineering,
Aerospace Engineering Control & Systems Engineering Engineering Mechanical Engineering
Tujuan dari publikasi jurnal ini adalah untuk menyebarluaskan pemikiran konseptual atau ide dan hasil penelitian bidang teknik mesin yang telah dicapai. Jurnal Terapan Teknik Mesin, terutama berfokus pada masalah utama dalam hal hasil penelitian dan karya ilmiah Layanan Komunitas: Analisa Struktur, Material Teknik, Metalurgi, Kinematika, Dinamika, Termodinamika, Perpindahan Kalor, Teknik Material, Desain dan Manufaktur, Mesin Konversi Energi, Teknik Pendingin/Refrigrasi, Mekanisa Fluida, Mesin Fluida, Aerodinamika, Hidrodinamika, Metrologi, Getaran Mekanik, Otomasi Industri, Mekatronika.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 136 Documents
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Effect of valve opening optimization on fuel delivery and combustion efficiency in a multi-burner waste-oil heating system Burhan Hafid; Erwen Martianis; Murdani; Siti Umira; Abdul Gafur
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.2094

Abstract

The utilization of waste oil as an alternative fuel has considerable potential for small-scale heating and distillation systems; however, its combustion performance is strongly influenced by fuel flow regulation and burner configuration. Most previous studies have primarily investigated single-burner waste-oil systems, resulting in limited understanding of valve opening effects in multi-burner configurations commonly used in practical applications. This study experimentally evaluates the effect of valve opening angle on fuel delivery and combustion performance in a three-burner waste-oil stove using SAE 10W-40 waste oil. Valve openings of 30°, 35°, and 40° were tested, with all burners operating simultaneously under the same airflow conditions. Combustion performance was evaluated based on fuel consumption, combustion temperature, heat release, and thermal efficiency. Experiments were conducted under steady-state conditions with a fixed combustion duration; fuel consumption was measured volumetrically and flame temperature was recorded using K-type thermocouples, with each test repeated three times to improve data reliability. At a 40° valve opening, the fuel flow rate of 448–488 mL/min represents variations among individual burners operating concurrently, while the combustion temperature range of 633–679°C reflects the experimental spread measured across the three burners. The results show that increasing valve opening increases fuel flow and heat release; however, excessive valve opening leads to an imbalance between fuel supply and available air. At a 35° opening, the fuel flow rate is sufficiently high while still allowing adequate air entrainment, producing a more favorable air–fuel mixing condition compared to lower and higher openings. In contrast, the 40° opening causes over-fueling, resulting in unstable flames, soot formation, and incomplete combustion despite higher energy input. These conditions are directly associated with reduced operational safety due to flame instability and increased soot deposition.The main contribution of this study is providing experimental evidence on valve opening optimization in a multi-burner waste-oil combustion system, offering practical guidance for improving efficiency, combustion stability, and safe operation in waste-oil-based heating applications.
Crankshaft’s machining process accuracy improvement by integrating DMAIC framework, Shainin Red X, and Taguchi Method Agus Setyo Anto Wibowo; Yunita Umniyati; Aditya Tirta Pratama
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.2103

Abstract

This study investigates the problem of oversized hole diameter defects in crankshaft machining. The problem occurred in fine boring process which accounted for 42.3% of total rejections in the machining process. To systematically overcome this issue, a hybrid methodology was adopted by integrating 3 methods: Six Sigma’s DMAIC framework, Shainin Red X root cause analysis, and Taguchi Design of Experiments (DOE). By using multi-vari analysis and Red X techniques, the dominant cause of variation was identified as inconsistent tool offset input by operators, with secondary factors including clamper piston wear and part positioning misalignment. Taguchi DOE confirmed that depth of cut significantly influenced hole diameter accuracy, while spindle speed had minimal effect. The optimized machining parameters improved process capability, reducing rejection rates and cutting failure costs. The results show the synergy between diagnostic and optimization methods, providing a structured, data-driven framework for sustainable machining improvements. The novelty of this study lies in the integrated application of DMAIC, Shainin Red X, and Taguchi DOE to focus on oversized hole defects in crankshaft fine boring, an approach that has rarely been applied to turning-based off-center boring processes, with implications for both academic research and industrial precision machining practice.
Design and development of an IoT-based coolant top-up automation system to enhance productivity and cost efficiency in machining prosses Al Faruq, Muhammad Sholih Faiz; Kristianto, Stevanus Brian; Kesawa, I Gusti Nyoman; Purwoko, Yohanes P Agung; Novita Anggraini W; Beny Hermawan; Danang Wahyudi; Yudistara, Selamat
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.2158

Abstract

PT XYZ experiences inefficiencies in the coolant top-up process during machining operations, which is currently performed manually. This method is time-consuming and icreases the risk of damage to cutting tools and machines, therby contributing to higher maintenance costs. To address this issue, a system capable of assisting the coolant top-up process as well as to enable rapid and real-time monitoring the coolant quality and quantity is required in order to prevent tool damage and reduce maintenance cost. Using an 8 Step Methodology, an automatic coolant top-up system for machining processes was developed based on Internet of Things(IoT) technology with real time data acquisition and transmission. Experimental results show that the system improvestime efficiency by 80 %, reduce coolant consumption by 8 %, and increases cutting tool eficiency by for type D (driiling) , 6 % for type IN (tapping) and 20 % for type C (milling). These results demonstrate that the system effectively enhances operational efficiency and reduces costs in machining process. The innovative contribution of this study lies in the integration of low-cost IoT components with a cloud-based spreadsheet platform for real-time monitoring and control, making the system easy to implement, scalable and cost-effective for coolant management in machining operations.
Design and performance test of kiln dry machine with intermitent drying method Purwanto, Agung Ari; Widiyanto, Wahyu; Nurmadina; Wijayanto, Arip; Saputra, Deni
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.2167

Abstract

The quality of furniture products is largely determined by the quality of the wood raw materials, particularly the degree of dryness and moisture content of the wood. Wood drying can be done naturally with sunlight or using a drying machine. Most research on drying machine design is still conventional with a continuous drying method, namely controlling the external temperature and the wood surface to keep it stable. The research aims to produce a Kiln Dry machine that can support intermittent drying by setting and monitoring temperature and humidity controls. Drying with the intermittent method has been proven to reduce defects that occur in wood. The process flow in this research includes system design, system simulation, system creation, and testing the results. The designed drying machine is capable of operating intermittently or continuously, with an outer size of 90 cm × 100 cm × 100 cm and a drying room of 70 cm × 80 cm × 80 cm, the walls are designed using rock wool insulation to maintain the temperature of the machine room. The results of the function test show that the machine is capable of reaching a temperature of 196 °C in 60 minutes, with an operating temperature limited to 115 °C. The five-stage intermittent drying test with a ramp time of 10 minutes and a soak time of 10 minutes showed that the temperature control system was able to follow the set value at each stage, although there was a temperature overshoot of 2-5ºC at each stage in the Intermittent test
Design and fabrication of an automatic tofu factory liquid waste treatment system for hydroponic nutrients Jaenudin, Jajang; Sihite, John David; Nurkhamdi
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.2169

Abstract

Tofu, a popular traditional food in Indonesia, produces liquid waste from its production process. This waste, after reducing Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD), can be used as a hydroponic nutrient solution. However, the waste has a relatively high acidity level (low pH), whereas the optimal pH range for hydroponic nutrients is 5.5–6.8. Manual pH control is prone to delays and inaccuracies, which can disrupt plant growth. Therefore, this study designed and built an automated microcontroller-based system to condition the pH of tofu wastewater. The system integrates a pH sensor, solenoid valve, stirrer motor, distribution pump, and an Arduino UNO controller. Testing results show that the system can automatically control pH with a stable neutralization rate, reaching the target pH range within 8–15 minutes depending on the initial waste volume. The pH sensor exhibited an average accuracy of ±0.1 pH units. The solenoid valve activates only when pH ≤ 5.5, while the distribution pump operates within the pH range of 5.5–6.8 and temperature below 30°C. This system has the potential to be applied on a small industrial scale as an appropriate technology for converting tofu wastewater into hydroponic nutrients. This approach enhances process efficiency, reduces manual intervention, and supports circular economy principles by valorizing organic waste.
Implementation of Lean-Based QCC Method for Reducing Rework and Enhancing Process Reliability in Supply Pump Testing Alfaruq, Muhammad Amiruddin; Abikusna, Setia; Hanif, Muhammad Kaysan
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.2161

Abstract

Rework in component testing processes represents a significant source of waste and process instability in heavy-equipment remanufacturing. In supply pump testing, unstandardized procedures and equipment variability often lead to repeated testing and extended lead time. This study examines the effectiveness of a Lean-based Quality Control Circle (QCC) approach in stabilizing the supply pump testing process and reducing rework. An industrial case study with an action-research approach was conducted in a heavy-equipment remanufacturing environment from March to July 2025. The QCC 8-Step methodology, integrated with Lean principles, was applied to identify root causes, implement corrective actions, and establish standardized testing procedures. Performance was evaluated using a before–after comparison based on testing records, operational logs, and operator feedback. The findings indicate that no rework cases were recorded after implementation compared to a baseline rework rate of 35%. Average testing time per unit decreased by approximately 50%, while operator satisfaction increased from 30% to 89%. These results demonstrate that integrating Lean and QCC effectively reduces defect-related waste and improves process reliability through standardization. The study contributes to applied industrial research by positioning Lean-based QCC as a practical framework for enhancing process reliability and supporting sustainable and digitally ready manufacturing systems.

Page 14 of 14 | Total Record : 136

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