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Rahmat Azis Nabawi
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raazna@ft.unp.ac.id
Phone
+6281277328670
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Syahril@ft.unp.ac.id
Editorial Address
Jl. Prof. Dr. Hamka Kampus UNP Air Tawar
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INDONESIA
Teknomekanik
ISSN : 26219980     EISSN : 26218720     DOI : 10.24036/tm.
Core Subject : Engineering,
Aims The Teknomekanik journal aims to present the latest development and achievements in scientific research in Indonesia and overseas to the world’s community especially to simulate and promote academic exchange between Indonesia and foreign scientists, engineers, and researchers everywhere. Original, innovative and novel contributions providing insight into the use of analytical, computational modelling as well as experimental research results are encouraged. The Teknomekanik are edited by the international board of distinguished local and foreign scientists, researchers. The objective of publishing this journal in English is to strengthen international exchange in academic research. Scope The Teknomekanik provides the forum for high-quality research communications and addresses all aspects of original experimental information based on theory and their applications. This journal welcomes all contributions from those who wish to report on new developments in mechanical engineering fields within the following scopes. Traditional and renewable energy Railway technologies and machines Oil and gas technologies and processing Mining and mineral processing Marine structures and machines Construction, building and infrastructure services Biomedical devices and assistive technologies Agriculture technologies and machines Aerospace and aeronautical Automotive, freight and transport Industrial engineering, quality management, power and process engineering Machine design, manufacturing, and industrial processes Materials science and technology Acoustics and vibration Dynamics and mechanics Thermos-fluids and heat transfer Mechanical failures, fracture, fatigue, manual and bulk handling Mechanical and machine design, control, applied robotics and mechatronic Biomechanical design and technology Piper, pumps, and hydraulics, Nano, smart and biomaterials Refrigeration and air-conditioning Condition and performance monitoring and other related sciences.
Articles 27 Documents
Effect of Strong Welding Flow on the Violence of Low Carbon Steel Results of SMAW Welding with Electrodes 7018 Jasman, Jasman; Irzal, Irzal; Adri, Junil; Pebrian, Pebrian
Teknomekanik Vol 1 No 1 (2018): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v1i1.972

Abstract

Welding can be interpreted by the process of joining two metals to the molten metal point. Metal low carbon steel which is easily processed by welding techniques. Strong setting of the welding current will affect the weld. If the current used is too low it will cause the difficulty of igniting the electric arc. Conversely, if the welding current is too high, the electrode will melt too fast. The welding current strength 130A corresponds to the diameter of the 3.2 mm electrode. The purpose of the research was to determine whether or not the influence of welding current on the low carbon steel hardness of SMAW welding results with E7018 electrode. This type of research was carried out by the type of experimental research, the research process was carried out by hardness testing, and the data obtained through the results of hardness testing was followed by observation and analysis of specimens of low carbon steel ST 37 welded by SMAW with different current strength using E-7018 electrode. Low carbon steel specimens from SMAW welding with 130 A welding current using E-7018 electrode have a higher hardness value compared to low carbon steel specimens produced by SMAW with welding current strengths of 100A and 160A using E-7018 electrodes.
Numerical Analysis of Fluid Flow on Cross Flow and Kaplan Turbine Prototype Purwantono, Purwantono; Sidiq, Ahmad Halim; Irzal, Irzal; Refdinal, Refdinal
Teknomekanik Vol 1 No 2 (2018): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v2i1.1972

Abstract

Based on previous research conducted by Purwantono about the utilization of exhaust flow from a conventional cross-flow turbine prototype that was used as an inlet of tubin Kaplan [1]. This research was carried out to see how the exhaust flow velocity of each tubin before and after was combined into one combination turbine. This numerical based study uses the Ansys 18.0 application by inputting a 3D design from a conventional turbine prototype which was used as the material for this study. The results obtained in this study show the average of outlet velocity in the Kaplan turbine that uses a velocity outlet from a cross flow turbine of 0.3 m / s greater when it is combined, which is 8.33 m / s and after being combined to 0.38 m / s. The results of this study are expected to contribute to the development of conventional turbines later
Welding defects, Causes and their Remedies: A Review Rizvi, Saadat Ali; Alib, Wajahat
Teknomekanik Vol 2 No 2 (2019): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v2i2.3272

Abstract

This review paper looks at the causes of welding defects and their remedies which occur during the welding process. Welding industries in developing countries bearing poor quality and productivity due to the involvement of a number of the process parameter. Even in a completely controlled process, defects in the welding are observed and hence welding process is also known as the process of uncertainty which challenges explanation about the cause of welding defects. In order to identify the welding defect and problem-related to welding, the study is aimed at the research work. This will be beneficial in enhancing the yield of welding. Beside this, standardization (optimization) of process parameter for the entire cycle of manufacturing of the critical part is intended in the proposed work .This review paper also provides the accurate guideline to the quality control department to find welding defects and will help them to analyze defects which are not desired. In this review paper, an attempt has been made to categorise the various welding defects and their root causes of happening.
Comparative Study of Performance Test of Refrigerators and Its Relationship with Electric Power Consumptions Karudin, Arwizet -
Teknomekanik Vol 2 No 2 (2019): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v2i1.3772

Abstract

Refrigerator has a significant role as a tool for food storage. Stored foods in refrigerator can be maintain the food quality and delay the stale. Currently, the refrigerator not only used at home but also in offices or shops that sell foods. It could imagine if without refrigerator, the foods will fast stale and lost their quality. This Research aim to know the performance parameters of refrigerator among others consumption total refrigerator power compared to with the resulting performance or Energy Efficiency Ratio (EER), and characteristics decline temperature in cabin at range time certain with two of brands refrigerator on the market. Research about of the refrigerator performances follows ISO-7371-1985 standards, European Standard EN 153, British Standards Institution 1990. Results obtained to refrigerator tested that average input power for refrigerator A is 83.3 Watts and input power inside condition stable of 66 Watts, EER 1.84 and the minimum temperature can be achieved in cabin refrigerator in time for 5 hours; -11.8 ℃ in the above of cabin, -6.2 ℃ in the center of cabin and 5.1 ℃ in the bottom of cabin, temperature product is -14.4 ℃. For refrigerator B average input power is 85.8 Watts and input power inside condition stable is 74 Watts, EER 1.64 and the minimum temperature can be achieved in cabin refrigerator; -5.5 ℃ in the above of cabin, 0.9 ℃ in the middle of cabin and 1.7 ℃, temperature product is -9.8 ℃.
Study of Ship Design Maninjau Lake Tourism by Using Catamaran Hull Type and Fiberglass Material Trisyaldi, Ar; Purwantono, Purwantono; Waskito, Waskito; Primawati, Primawati; syahril, syahril
Teknomekanik Vol 2 No 1 (2019): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v2i2.3072

Abstract

Maninjau lake uses ships designed in a simple way without significant innovation from time to time. This case is caused by design methods that are based on hereditary knowledge from generations to generations, so that the ships that are made tend to have the same shape and size. Innovation is needed to get a higher level of efficiency and effectiveness on a ship. The innovation that needs to be done is the design of ships with a multi-hull shape or catamaran. The pre-design of the catamaran hull is based on using the comparation method as the dimension ratio of the ship, so that the dimensions of the ship are LWL = 4 m; LPP = 3.96 m; B = 1.7 m; B1 = 0.36 m; D = 0.7 m; d = 0.307 m. After that, testing the resistance (resistance) while determining the amount of Power needed. The next step is to analyze Stability and Seakeeping to determine the efficiency and effectiveness of the hull type. Analysis carried out on this type of hull was applied to several models, then the best hull design was found. Each design is distinguished by hull shape, but has the same displacement which is equal to 0.448 tons. The first model of the catamaran hull with the type of Flat Inside Symmetry; second with the type of symmetry Flat Outside; and the third type with gastric Asymmetry.
Simulation of Multi Blade Rotor Performance at Horizontal Axis by Ansys Version 18.0 Using For Planning Dual Rotor Wind Turbine Models Mulyadi, Mulyadi; Hasanuddin, Hasanuddin; Waskito, Waskito; Syahrul, Syahrul
Teknomekanik Vol 1 No 2 (2018): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v2i1.2172

Abstract

The dual rotor wind turbine is a wind turbine which has horizontal and vertical sides. The data obtained in the form of average wind speed, the speed of rotation of the horizontal and vertical vanes. Researchers want to create simulations of multi rotor blade performance on the horizontal side using Ansys application version 18.0. The purpose of this research is looking at changes in wind speed on the outlet area with wind speed sign at the inlet area is 4 m/s. Researchers want to see maximum wind pressure at the inlet area, pressure on the area of the blade, the pressure at the outlet area. The results obtained show that the wind speed in the area of the inlet is of 4 m/s changed to 3.99237 m/s at area outlets. Maximum pressure in the inlet area is of 0.133612 Pa. turn into 457,528 Pa. area blade windmills, to the outlet pressure area turn into 0 Pa.
Design and Testing of Belt Grinding Development Setiawan, Sepdirama; K, Arwizet; Syahri, Budi; Ambiyar, Ambiyar; Darmawi, Darmawi; A, Yufrizal
Teknomekanik Vol 1 No 2 (2018): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v2i1.1772

Abstract

The author observes that the use of belt grinding is still rare in the writer's own environment, both in the fields of education and small industries, because there are still many people who are fixated on ordinary grinders, and think that ordinary grinders are better in all work. The development of belt grinders has changed people's perspectives through the development that the authors have done, with increasing belt grinding functions through development which will certainly make belt grinders even more useful. This belt burrs are made and developed through pre-existing belt grinding shapes. The result of this development is a belt grinder which has a function more than the belt grinder which is already before. This belt burrs has three types of work functions, namely vertical, horizontal, and cutter, and also features speed control. With the development that the author does, of course, it will change people's perspectives because belt grinding has a function that is better than before and can better help the work of a grinding process.
Comparison of Accuracy in Cutting Dental Profiles Between Differential Methods Approach Upward with a Lower Approach to Making Straight Gear Wheels Agustian, Ganda; A, Yufrizal; Irzal, Irzal
Teknomekanik Vol 1 No 2 (2018): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v2i2.1672

Abstract

In the world of industrial gear use, it cannot be denied, every machine in the industrial world uses a component, namely gears to move rotating power. For this reason, in making gears the precision of the gear profile must be considered. The purpose of this study is to compare the accuracy of cutting the dental profile between the approach differential method and the approach to the bottom. This research is an experimental research. Based on the results of data analysis on the comparison of the precision of cutting dental profiles between the approach differential methods and the approach to the bottom, the upward approach is more appropriate in terms of thickness and number of teeth. The number of samples used in the study of 12 gears consisting of 6 gears was carried out with the approach differential approach method, and 6 gears were carried out by the differential approach approach method. Each sample is measured in thickness and the number of teeth in a straight gear. After measurement, the data is processed using the t-test formula to see the significant difference in the accuracy of the dental profile. Based on the results of the t-test analysis that has been carried out there are differences in the gears produced. The approach to differential approach to getting better gear results.
Design Build Dryer Machine Frying Results Nuts Eggs Purwantono, Purwantono; Waskito, Waskito; Rinaldo, Putu Satria; primawati, primawati
Teknomekanik Vol 1 No 1 (2018): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v1i1.572

Abstract

The purpose of this research is to design oil drying machine in nurts eggs to get the result of working drawing and to determine the peanut dryer component. The concept of planning oil drying machine in nurts eggss is by conducting a direct survey of the egg industry, the problems arise still high levels of oil in manually dried peanuts, then carry out the design concept. Based on the concept, then designed a design drawing. The result of this final task is in the form of design or design of oil oven dryers that utilize centrifugal force for drying oil, oil stainless steel rotary tube components, stainless steel container tube with stainless steel , axle components to support tubes of 22mm diameter and 520mm length, pulleys with a 3/6 ratio as a rotary reducer of an electric motor of 0.5 HP 1400 rpm to 500 rpm. Frame profile machine L 40 x 40 x 4 mm 42 st material and engine components made by Fernando Ferry from material st 37.
Effect of Cooling Media on Steel Hardness ST 37 On Conventional Lathe Process Erizon, Nelvi; Ardiyansyah, M Iksan; Jasman, Jasman; A, Yufrizal
Teknomekanik Vol 1 No 1 (2018): Teknomekanik
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tm.v1i1.372

Abstract

This study aims to determine the type of air cooling media, soluble oil, and air to the result on lathe ST 37 steel. The cooling medium is very important to maintain boring tool deformation and can add product quality. In the process lathe of friction between the workpiece and chisel cut that can produce overheating and influence on the result of the slice boring tool on the workpiece. The research that will be carried out is experimental research with variables that are controlled that is feeding, deep of a cut, and spindle rotation and examination of the hardness of the specimen on the object before done lathe. The sample in this study which is ST 37 steel with diameter 25 mm and length 60 mm as many as 9 specimens which will be done lathe with different type media kind inprocess working. To know influence the type of cooling medium against steel ST 37 is done brinnel hardeness test using test equipment hardness tester. Of the 9 specimens lathe will be determined 3 points to do hardeness tests. From the result of hardness test and analysis obtained from hardness test on steel ST 37 average data that is use of soluble refrigerant media that produce a very good cooling at the time of the lathe process. The results of research is obtained that the use of soluble refrigerant media is the best with an average hardness of 224.10 kg / mm². On the lathe process, the cooling media has oil content will be able to maintain the scores hardness and time-worn on boring tool. Thus to maintain the hardness values can be used soluble oil cooling media and to increase the hardness values of workpieces can be used air cooling media.

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