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All Journal MAKARA Journal of Technology Series Makara Journal of Technology Rekayasa Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Makara Journal of Technology
Aida Mahmudah
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Aplikasi Teknologi Single Point Incremental Forming (SPIF) pada Pembentukan Half Spherical-Shaped Product Mahmudah, Aida; Permana, Sidik; Setiawan, Haris; Arif, M. Fauzan
Jurnal Rekayasa Mesin Vol 11, No 2 (2020)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2020.011.02.9

Abstract

In this study, the single point incremental forming (SPIF) method was applied to the half spherical-shaped vent cap products with 1mm thickness of aluminium. The dimensions of the blank before forming is 1x Ø225mm, and the final dimensions of the product are 69.50 x Ø225mm. Blank material is gripped to the fixture explicitly made according to the final product shape. The SPIF process uses a punch tool with a diameter of 12mm, so the process condition parameters that will be used are 0.5 mm step down, 35 rpm spindle speed, and 1000 mm/min feed. The lubrication used is VG 32 isocut cutting oil. The SPIF process for air cap products is carried out using two forming strategies, namely single-stage and multi-stage. In the single-stage formation strategy, the product experienced a tear at a depth of 18.5mm. Whereas in a multi-stage forming strategy, a product with three forming stages was successfully formed without tears, but experienced changes in dimensions and shape at the end of the final stage. Therefore the testing of SPIF process in a half-spherical shaped still requires development to get the planned shape and dimensions.
Analysis of Kancils Car Knuckle Prototype Soemardi, Tresna; Mahmudah, Aida
Makara Journal of Technology Vol 8, No 1 (2004)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (258.059 KB) | DOI: 10.7454/mst.v8i1.80

Abstract

The objective of this work is to execute strength analysis of knuckle, which is made from FCD 50, by using static analysis on maximum loading. This maximum loading is obtained from front axle loading calculation on particular operating condition. That is, vehicle is braking while cornering in down hill. From previous vehicle loading calculation, we get a number of loading values on different speed and deceleration. At the end, we get a value of speed and deceleration that guarantee the vehicle safety if it is braking while cornering in down hill. As comparison, loading calculation is executed too for same operating condition on level ground. This is because of different deceleration for each operating condition, 0,5g for operating condition on downhill and 0,2g on level ground. The result shows that maximum loading occurred when vehicle is operated on down hill is larger than on level ground. Study of static focused on quantitative description of loads that act on technical structure in equilibrium.
Development and Measurement of 5 kN µ-Forming Machine Mahmudah, Aida
Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 1, No 1 (2016)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (633.793 KB) | DOI: 10.22219/jemmme.v1i1.4474

Abstract

The need of micro part become increasingly popular which make increase of the need of prodution technology with high accuracy, productivity, efficiency, and reliability.Metal forming technology offers the solution to answer the challenge. High produtivity, zero material losses, good mechanical properties of product, and tight tolerance is able to achieve by micro forming technology. This thing make metal-forming fit for mass production based on near net shape technology concept it offered.Miniaturized effect phenomena which was not simple on micro-scale manufacturing process, demand high accuracy level from all aspect of micro-manufacturing process, which are material, tool, machinery and process. Therefore, characteristic of micro-forming machine become important in defining reliability of micro-forming system.  Micro-forming machine under investigation was 5 kN m-Forming Machine developed in Manufacturing Laboratory, Department of Mechanical Engineering, Universitas Indonesia. Modification to the machine made changes on machine characteristic. Therefore, it need characterization of the machine by measuring its geometric measurement and linear movement. The research revealed that deviation caused by imperfection of geometry of assembled machine component shown good results. Testing of linear movement of machine in one cycle show the range of deviation was 0.024 mm with smallest deviation was -0.0135 mm while the biggest one was 0.0105 mm.  The value of deviation was below etimated value which estimated from mathematical analisys of backlash. The results of machine linear movement also gave reccomendation of effective path of 5 kN m-Forming Machine, which is on path along 30 mm to 40 mm, from point A which had been decided before.
PENGEMBANGAN ANALISIS STATIK PROTOTYPE KNUCKLE MOBIL KANCIL Tresna Soemardi; Aida Mahmudah
MAKARA Journal of Technology Vol 8, No 1 (2004): April
Publisher : Directorate of Research and Community Engagement, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Analysis of Kancil's Knuckle Prototype. The objective of this work is to execute strength analysis of knuckle, whichis made from FCD 50, by using static analysis on maximum loading. This maximum loading is obtained from front axleloading calculation on particular operating condition. That is, vehicle is braking while cornering in down hill. Fromprevious vehicle loading calculation, we get a number of loading values on different speed and deceleration. At the end,we get a value of speed and deceleration that guarantee the vehicle safety if it is braking while cornering in down hill.As comparison, loading calculation is executed too for same operating condition on level ground. This is because ofdifferent deceleration for each operating condition, 0,5g for operating condition on downhill and 0,2g on level ground.The result shows that maximum loading occurred when vehicle is operated on down hill is larger than on level ground.Study of static focused on quantitative description of loads that act on technical structure in equilibrium.Keywords: vehicle operating condition, maximum loading, working plane, free body diagram, moment and loadequilibrium principle.
Development and Measurement of 5 kN µ-Forming Machine Aida Mahmudah
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 1 No. 1 (2016)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v1i1.4474

Abstract

The need of micro part become increasingly popular which make increase of the need of prodution technology with high accuracy, productivity, efficiency, and reliability.Metal forming technology offers the solution to answer the challenge. High produtivity, zero material losses, good mechanical properties of product, and tight tolerance is able to achieve by micro forming technology. This thing make metal-forming fit for mass production based on near net shape technology concept it offered.Miniaturized effect phenomena which was not simple on micro-scale manufacturing process, demand high accuracy level from all aspect of micro-manufacturing process, which are material, tool, machinery and process. Therefore, characteristic of micro-forming machine become important in defining reliability of micro-forming system.  Micro-forming machine under investigation was 5 kN m-Forming Machine developed in Manufacturing Laboratory, Department of Mechanical Engineering, Universitas Indonesia. Modification to the machine made changes on machine characteristic. Therefore, it need characterization of the machine by measuring its geometric measurement and linear movement. The research revealed that deviation caused by imperfection of geometry of assembled machine component shown good results. Testing of linear movement of machine in one cycle show the range of deviation was 0.024 mm with smallest deviation was -0.0135 mm while the biggest one was 0.0105 mm.  The value of deviation was below etimated value which estimated from mathematical analisys of backlash. The results of machine linear movement also gave reccomendation of effective path of 5 kN m-Forming Machine, which is on path along 30 mm to 40 mm, from point A which had been decided before.
Analysis of Kancil's Car Knuckle Prototype Soemardi, Tresna P.; Mahmudah, Aida
Makara Journal of Technology Vol. 8, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Analysis of Kancil’s Knuckle Prototype. The objective of this work is to execute strength analysis of knuckle, which is made from FCD 50, by using static analysis on maximum loading. This maximum loading is obtained from front axle loading calculation on particular operating condition. That is, vehicle is braking while cornering in down hill. From previous vehicle loading calculation, we get a number of loading values on different speed and deceleration. At the end, we get a value of speed and deceleration that guarantee the vehicle safety if it is braking while cornering in down hill. As comparison, loading calculation is executed too for same operating condition on level ground. This is because of different deceleration for each operating condition, 0,5g for operating condition on downhill and 0,2g on level ground. The result shows that maximum loading occurred when vehicle is operated on down hill is larger than on level ground. Study of static focused on quantitative description of loads that act on technical structure in equilibrium.
Co-Authors Arif, M. Fauzan ARIS BAGUS SETIAWAN Sidik, Adi Permana Tresna P. Soemardi Tresna Soemardi Tresna Soemardi, Tresna