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All Journal Rekayasa Mesin Dharma: Jurnal Pengabdian Masyarakat
Achmad Wibolo
Jurusan Teknik Mesin Fakultas Teknik Universitas Brawijaya
Mechanical Engineering Social Sciences

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Optimasi Parameter Pemotongan Mesin Bubut CNC Terhadap Kekasaran Permukaan dengan Geometri Pahat yang Dilengkapi Chip Breaker Wibolo, Achmad; Wahyudi, Slamet; Sugiarto, Sugiarto
Rekayasa Mesin Vol 2, No 1 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (573.689 KB)

Abstract

In machining operation, the quality of surface finish is an important requirement for many turned workpieces. Thus, the choice of optimized cutting parameters is very important for controlling the requied surface quality The focus of present experimental study is to optimize for cutting speed, feed rate, and radius chip breaker using two performance measures, metal removal rate and surface roughness. Response Surface Methodology (RSM). has been applied for developing models in the form of multiple regression equations correlating dependent parameters with cutting parameters and radius chip breaker, in a turning process. The central composite rotatable design was used to plan the experiment, and analysis of variance were employed to study the performance characteristics for three variable independent in turning operation. A second-order model which can describe the relation then to find combination between cutting parameters and radius chip breaker which resulting the maximum metal removal rate and minimum surface roughness. The experimental results reveal that the most significant cutting parameters for surface roughness is cutting speed, followed by feed rate and radius chip breaker. Based on the optimization results, recommended cutting speed, feed rate, and radius chip breaker is 35 m/mt, 0,2819 mm/rev, and 0,85 mm. By implementing this parameters, the surface roughness and metal removal rate is 2,18 μm and 6230,80 mm3/mt.Keywords : Surface Roughness, Metal removal rate, response surface methodology, turning
IMPLEMENTASI PLTMH UNTUK MENDUKUNG GREEN TECHNOLOGY DI DUSUN PETAPAN KLUNGKUNG Adiaksa, I Made Anom; Suherman, I Ketut; Wibolo, Achmad
Dharma: Jurnal Pengabdian Masyarakat Vol. 1 No. 2 (2020): November
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/dlppm.v1i2.4055

Abstract

The area of Petapan Hamlet is an upstream area where there are still many water sources as the main flow for downstream irrigation. There is one secondary stream with a fairly large channel size (2 m wide and 1 m deep). The flow velocity of this channel averages 1.6 m / sec with an average water depth in the dry season of 40 cm. The relatively large size of the channel results in a water flow of 1.26 liters / second. There is one place where the dimension of the channel shrinks for the distribution of irrigation to a width of 1 meter so that the correlation with a steady flow rate will increase. The people of Petapan Hamlet have built a tourism area based on green tourism with educational tourism as the main point. This tourism area is traversed by the subak water channel which will later be used as a place to play and educational tours about the subak irrigation system for tourists visiting this place. There is no supporting infrastructure in developing this tourism, both facilities and supporting facilities for the convenience of tourists in carrying out their activities The energy source that will be used to support the development of educational tourism is obtained from PLN sources. Lack of knowledge of the tourism community based on green tourism green technology (environment-based energy) which can be used as educational tourism              In 2019, a micro hydro generator in the form of a waterwheel has been built with an output power of 7000 kg / cm2. This power is obtained from the encouragement of water flow when it touches the blade of the wheel. This power is relatively large if it can be transmitted to generators. Problems that arise related to large power are small rotations. From the mill, the maximum rotation produced is 15 rpm. Making the rotation conversion by means of pulley reduction and gearbox resulting in a rotation of 1500 rpm. This obstacle is overcome by utilizing a DC type generator to lighten rotation and losses due to friction with 500 watts of power.
Co-Authors I Made Anom Adiaksa Slamet Wahyudi Sugiarto S Suherman, I Ketut