cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Bernardus Crisanto Putra Mbulu
Contact Email
chris_bernardo666@widyakarya.ac.id
Phone
+6281238177298
Journal Mail Official
chris_bernardo666@widyakarya.ac.id
Editorial Address
Universitas Katolik Widya Karya Jl. Bondowoso No.2, RW.2, Gading Kasri, Kec. Klojen, Kota Malang, Jawa Timur 65115
Location
Kota malang,
Jawa timur
INDONESIA
METAL
Published by Universitas Katolik Widya Karya Malang
ISSN : 29882206     EISSN : 29882214     DOI : XX.XXXXX
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
METAL (Mechanical, Energy and Material): Menyambut baik kiriman yang memberikan wawasan tentang masalah terkini dan utama yang berhubungan dengan studi Mekanika, Energi dan Material. Jurnal ini menyediakan tempat bagi para peneliti untuk berdiskusi, mengejar dan mempromosikan pengetahuan di bidang-bidang yang muncul dan berkembang dalam studi ilmu Mekanika, Energi dan Material. Artikel bisa ditulis dalam bahasa Inggris atau bahasa Indonesia.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 25 Documents
 1   2   3 
IMPACT OF ANODE-CATHODE DISTANCE VARIATIONS ON NICKEL ELECTROPLATING OF AISI 1020 STEEL: HARDNESS AND CORROSION RATE ANALYSIS Nereus Tugur Redationo; Mannuel, Carlos Yoga; Murdiyanto, Danang
Mechanical, Energy and Material (METAL) Vol. 2 No. 1 (2024): Juni: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i1.90

Abstract

Nickel electroplating on AISI 1020 steel is expected to increase hardness and enhance aesthetic appearance. Nickel plating on AISI 1020 steel is also anticipated to protect the steel surface and reduce the rate of corrosion. In the nickel electroplating process, researchers studied variations in the anode-cathode distance (5 cm, 10 cm, and 15 cm) and the use of an aerator. Data from Vickers hardness tests, corrosion rate tests, and microstructure photos were used as the basis for analyzing corrosion rates. The corrosion rate value without the aerator at an anode-cathode distance of 15 cm is 0.034 mm/year, at 10 cm is 0.019 mm/year, and at 5 cm is 0.015 mm/year. With the use of an aerator, the corrosion rate at an anode-cathode distance of 5 cm is 0.022 mm/year, at 10 cm is 0.011 mm/year, and at 15 cm is 0.008 mm/year. The Vickers hardness values without the aerator for these distances were 337.3 VHN, 190 VHN, and 286 VHN, respectively, while with the aerator, the hardness values were 301.67 VHN, 200.33 VHN, and 339 VHN.
MAINTENANCE ON SUGAR CANE MILL ROLLERS TO PREVENT WEAR AND DAMAGE Harsa Dhani; Jahu, Reinardi Oddilian; Redationo, Nereus Tugur
Mechanical, Energy and Material (METAL) Vol. 1 No. 2 (2023): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v1i2.91

Abstract

One of the reasons the Sugar Factory failed to meet its sugar production target was due to damage to the machine components, particularly at the milling station, where the milling rollers are located. The milling rollers play a crucial role in extracting juice from sugar cane, separating the juice from the bagasse, and measuring the raw juice before it enters the purification process. This unit is designed to maximize raw juice yield while minimizing the amount of bagasse. The milling rollers are arranged in a triangular configuration of three mills, with a milling path between the front and rear rollers that can move forward and backward. Several common issues affect the milling rollers, including surface wear, damage from excessive loads, and wear from repeated friction between the rollers and the sugar cane. Sugar cane itself contributes to roller wear due to its composition, which includes water, sucrose, cellulose, lignin, hemicellulose, ash, and silica. These substances are highly corrosive, even to stainless steel, and act like abrasives against the rollers. The usual remedy at the factory is to weld stainless steel onto cast iron rollers. However, this method has only been moderately effective, as the rollers continue to experience wear after a short period. Based on field observations and literature reviews, some suggested solutions include more frequent cleaning and applying a tungsten coating to the roller surfaces.
ASSESSMENT OF MOBILE ROBOT LOAD-CARRYING POTENTIAL VIA DC GEARBOX MOTOR TORQUE Harsa Dhani; Redationo, Nereus Tugur; Dhancis, William
Mechanical, Energy and Material (METAL) Vol. 2 No. 1 (2024): Juni: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i1.93

Abstract

The primary function of mobile robots is to transport various loads, including their own weight and additional cargo. Ensuring adequate torque in the wheel motors is crucial for effective load-bearing and movement. This study investigates the load-carrying capabilities of the TT DC gearbox motor, a popular and cost-effective choice for small robots. A mobile robot equipped with four TT DC gearbox motors and employing skid steering locomotion was constructed for this purpose. The robot featured a container designed to carry sand, and its load capacity was tested by gradually increasing the weight until the robot could no longer move. Experimental results showed that the maximum load the robot could carry on a flat surface was 4000 grams, which corresponds to 1000 grams per 5 cm diameter wheel, driven by a stall torque of 0.08336 Nm (0.85 kg.cm). This finding is consistent with the motor's specified stall torque of 0.8 kg.cm at 6V. These results suggest that the maximum load of a mobile robot can be predicted using the motor's stall torque specification and the wheel radius through the total tractive effort (TTE) formula. This study offers valuable insights into estimating the performance limits of DC gearbox motors used in driving mobile robots.
KINEMATIC ANALYSIS OF HORIZONTAL SEALER, VERTICAL SEALER, AND DRAWING ROLLER IN A TEMPEH PACKAGING MACHINE PROTOTYPE Harsa Dhani; Redationo, Nereus Tugur; Natanael, Abel
Mechanical, Energy and Material (METAL) Vol. 2 No. 1 (2024): Juni: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i1.94

Abstract

The automatic packaging machine for tempeh improves both hygiene and efficiency in production. This Vertical Form Fill Seal model, equipped with a hole-punching mechanism, is examined in this study with a focus on the kinematics of its three key components: the horizontal sealer, vertical sealer, and drawing roller. The horizontal and vertical sealers are actuated by a single DC gear motor operating at 40 rpm, which manages their intermittent opening and closing. Additionally, a stepper motor running at 30 rpm controls the timing and drawing length of the plastic packaging, ensuring precise start and stop functions. The study's results revealed the following performance metrics for the machine's components: The horizontal sealer achieved a stroke distance of 62.4 mm, with the sealer operating at a maximum speed of 75.71 mm/s, and a total travel time of 1.65 seconds from closed to open position. For the vertical sealer, the stroke distance was 63 mm, with the sealer moving at maximum speed of 89.67 mm/s, and a travel time of 1.4 seconds from fully open to fully closed. The friction roller, driven by a stepper motor at 30 rpm, achieved a plastic withdrawal speed of 59.66 mm/s, allowing it to pull the plastic a maximum length of 167 mm within each 2.8-second cycle of the sealer components. It can be observed that continuous motor movement can be converted into intermittent back-and-forth motion using bar mechanisms, with the velocity at each position varying based on the length of the bars.
THE EFFECT OF COATING TEMPERATURE AND PARTICLE SIZE ON THE BURNING TIME OF KEMPI SHELL BRIQUETTES Vianus Ndopo Role, Narsisius; Murdiyanto, Danang; Crisanto Putra Mbulu, Bernardus
Mechanical, Energy and Material (METAL) Vol. 2 No. 1 (2024): Juni: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i1.96

Abstract

The current fuel is still sourced from fossil fuels, namely oil, coal and The current fuel is still sourced from fossil fuels, namely oil, coal and gas, which have many impacts on the environment. As an agricultural country located in the tropics, Indonesia is rich in biomass energy sources. In this research, the use of candlenut shells will be used or processed into alternative fuel, namely briquettes, with the aim of determining the value of combustion time and temperature produced through variations in composition and mesh size. The results of the research show that the effect of the burning temperature has an impact on the burning time of the briquettes and the resulting temperature, where the best burning time and temperature values ​​of the briquettes are produced by a burning temperature of 400°C with a grain size of 100 mesh, namely 177 minutes with an average burning temperature briquettes 193.9°C.
COMPARISON OF PARTICLES SIZE AND PRESSURE OF COCONUT SHELL CHARCOAL BRICKETS ON COMBUSTION TIME AND TEMPERATURE Mali, Alfin; Crisanto Putra Mbulu, Bernardus; Tugur Redationo, Nereus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.97

Abstract

Briquettes are a type of alternative energy whose raw material source comes from agricultural waste such as coconut shells. Coconut shells are converted into charcoal which has a higher calorific value through the pyrolysis process. The aim of this research is to determine the effect of comparing particle size and printing pressure on the length of burning time and burning temperature, so as to obtain a briquette composition that is durable and produces high temperatures. In this research, the raw material used was shell waste with a drying process of 400°C and the particle size variations used were mesh 30, 150 and 250 mixed with 12 grams of starch adhesive. The briquette molding process uses 3 kg and 5 kg pressure, which are then dried using an oven at a temperature of 750°C for 3 hours. Tests were carried out on burning time, burning temperature, water content and ash content. From the research results, it was found that for the highest temperature, briquettes with a particle size of 250 mesh were produced with a pressure of 5 kg at 312°C, and the flame duration of the briquettes was 240 minutes.
EFFECT OF TEMPERATURE VARIATIONS IN MANUAL TUBING MACHINES FOR PET PLASTIC MATERIAL ON TENSILE STRENGTH Wijaya, Kelvin; Murdiyanto, Danang; Cristanto Putra Mbulu, Bernadus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.98

Abstract

Briquettes are a type of alternative energy whose raw material source Plastic waste is an environmental problem faced by the people of Indonesia and the world. On the other hand, the production of waste generated in various institutions and sectors in Indonesia continues to increase every year, including the industrial sector whose production process is large-scale. Its use as a basic material for packaging bottles reaches 30% of world use. PET is also used as a synthetic fiber or polyester which accounts for 60% of world use. Study the author will do that is to make a tubing made from PET plastic waste that can be used as raw material for tubing. Using temperature variations (190℃, 200℃, 210℃), then 9 samples from each variation will be micro-photographed the effect of temperature on tubing results and tested for maximum tensile. After that, calculations are carried out to obtain the maximum tensile stress and strain values. Then the average maximum load value that can be received by PET tubing is highest at 190ºC temperature tubing has the ability to withstand tensile strength better than all temperature variations so that the average value is 35.94 N/mm2 and 200ºC is able to withstand 35.49 N/mm2 and 210ºC with 18.30 N/mm2. It can be interpreted that the higher the temperature, the effect on holding the tensile strength of the PET tubing and making the plastic structure change so that 210oC is close to the recycling value, while for temperatures below it is still non-recycled.
STUDY OF VARIATIONS IN GROOVED PRESS ROLLER LOADING ON THE TENSILE STRENGTH OF UMBRELLA GRASS FIBERS Anom Palmatira, Dismas; Murdiyanto, Danang; Cristanto Putra Mbulu, Bernadus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.99

Abstract

Composite materials have better material properties than ordinary materials. Based on current developments, the author participates in the development of composite materials by making a fiber from umbrella grass which is used to make composite materials. The author uses a grooved roller press to make umbrella grass fibers, using various loadings of 35kg, 40kg and 45kg, umbrella grass that has been rolled then looks at the structure of the fiber whether there is damage or fracture then every loading 3 fiber samples are taken and tested to obtain the strength value maximum pull. After the test data is obtained, calculations are carried out to obtain the maximum tensile strength value of each sample. The results obtained from each fiber with the highest tensile strength are loading of 35 kg with a tensile strength of 61.13478261MPa with a well-formed fiber structure, defects or fractures occur, then loading of 40 kg with a tensile strength of 55.90645161MPa with a well-formed fiber structure without Defects occurred and the final loading was 45 kg with a tensile strength of 28.02857143 MPa with the fiber structure formed where there were broken or defective parts of the fiber. Based on the research that has been done, umbrella grass fiber which has the highest tensile strength value and also has good fiber without damage is fiber at a loading of 35 kg.
ANALYSIS OF TENSILE STRENGTH OF HDPE 3D PRINTER FILAMENT PRODUCTION PROCESS THROUGH TEMPERATURE AND TIME VARIATIONS Kharis, Abdul; Cristanto Putra Mbulu, Bernadus; Tugur Redationo, Nereus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.100

Abstract

Plastic waste is one of the problems currently being faced by countries in the world and Indonesia is one of them. Indonesia is the second world order of the world as a producer of plastic waste into the sea, which is 187.2 million tons after China which reaches 262.9 million tons. There are many kinds of plastic waste, including one of them HDPE plastic waste. In this study the researcher uses HDPE (High Density Poliyethylene) plastic waste which will be recycled into a filamentt of raw materials from 3D printers using temperature variations (200 ℃, 210 ℃, 220 ℃) with heating the heater band under 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above obtained the highest capacity results at a temperature of 200 ̊C with heating time below 1 hour which produces filamentt production of 48.48 mm3/minute with a weight of 0.0028 kg/hour and motorcycle speed 10 rpm. Then 6 specimens from each variation will be photographed micro and tested to reach the point of breaking up. After that the calculation is done to get the maximum tensile voltage value and strain. Then obtained the highest maximum tensile voltage value with a temperature of 220 ̊C and heating plastic under 1 hour with a tensile strength value of 3,3344 N/mm2 This happens because the internal pore structure of the filament is formed more tightly and the plastic properties are still in good condition, this indicates that the load applied is evenly distributed on the filament
ANALYSIS OF PELTON WATER TURBINE DESIGN RESULTS THROUGH VALVE VARIATIONS AND COMPARISON OF NUMBER OF BLADES Andi Priyanto, Oktavianus; Tugur Redationo , Nereus; Crisanto Putra Mbulu, Bernardus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.101

Abstract

The Pelton turbine is an extension of the impulse turbine, the Pelton turbine operated with high pressure and changes in momentum received by the blades very large. In this research, the researcher wanted to analyze the effect of the number of blades against the momentum force that produces the turbine shaft rotation and generate electrical energy. The research used a mini Pelton type of water turbine, using blades with the number of blades 6, 12, and 18 blades. By using the valve opening ranging from 60o-720o, using an initial load of 150gr, arm length 15cm, then look for the unit conversion of discharge pressure (Pd), turbine head (HT), capacity water (Q), Water Horse Power (WHP), Brake Hourse Power (BHP), and efficiency turbine. The number of blades that are more effective for use in mini-type water turbines Pelton valve opening variations are 18 blades, because of the efficiency and force values greater momentum so that the rotation of the turbine shaft produces a blade 18 with the results of the calculation of the 18 blades obtained a manometer of 215.74 N/m2 turbine head 21.99 m, highest water capacity 0.012 m3/s, highest WHP 26,404 Watts, BHP the highest is 19,765 Watts, and the highest turbine efficiency is 75%.

Page 2 of 3 | Total Record : 25

 1   2   3 

Filter by Year

2023 2025


Reset
Filter By Issues
All Issue Vol. 3 No. 1 (2025): Juni: Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL) Vol. 2 No. 1 (2024): Juni: Mechanical, Energy and Material (METAL) Vol. 1 No. 2 (2023): Desember: Mechanical, Energy and Material (METAL) Vol. 1 No. 1 (2023): Juni: Mechanical, Energy and Material (METAL)