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Rancang Bangun Purwa-rupa CMM Tower Fixture Sebagai Dasar Media Pembelajaran GD&T Wilujeng, Auliana Diah
ROTASI Vol 22, No 1 (2020): VOLUME 22, NOMOR 1, JANUARI 2020
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

The CMM (Coordinate Measuring Machine) machine is a high-speed, multi-function measuring device that produces high measurement accuracy and efficiency. CMM machines have the advantage of being a high level of precision, accurate, and requires a short measurement time (more efficient). But the disadvantage is the product to be measured must be stationary / static, so it needs a fixture. This problem then requires a tower-shaped fixture to keep the object static. Tower-fixtures are generally rectangular (4 sides). Generally, objects that have a high degree of complexity will need a tower fixture that has more than 4 sides. The brand that provides a buffer tower with more than 4 sides, namely Renishaw, has a fairly expensive price.Product designs are designed and drawn using the SolidWork Software 2013. Products are made using machining processes including using lathes, milling machines, drilling machines, and bench work tools. The product material used is Aluminum 6061. After the finished product, the product will be validated in dimensions using a CMM machine.The results obtained indicate that 64.3% of the total measurement of the tower fixture product is within the permissible tolerance range. The rest, as much as 35.7% of measurements are not acceptable because they exceed the tolerance limit given. This is caused by several factors, including human error and inaccuracies in the machining process, causing a difference in dimensions between the design drawings and the original dimensions of the product.

RANCANG BANGUN PURWA-RUPA CMM TOWER FIXTURE SEBAGAI DASAR MEDIA PEMBELAJARAN GD&T Wilujeng, Auliana Diah
ROTASI Vol 22, No 1 (2020): VOLUME 22, NOMOR 1, JANUARI 2020
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.22.1.%p

The CMM (Coordinate Measuring Machine) machine is a high-speed, multi-function measuring device that produces high measurement accuracy and efficiency. CMM machines have the advantage of being a high level of precision, accurate, and requires a short measurement time (more efficient). But the disadvantage is the product to be measured must be stationary / static, so it needs a fixture. This problem then requires a tower-shaped fixture to keep the object static. Tower-fixtures are generally rectangular (4 sides). Generally, objects that have a high degree of complexity will need a tower fixture that has more than 4 sides. The brand that provides a buffer tower with more than 4 sides, namely Renishaw, has a fairly expensive price.Product designs are designed and drawn using the SolidWork Software 2013. Products are made using machining processes including using lathes, milling machines, drilling machines, and bench work tools. The product material used is Aluminum 6061. After the finished product, the product will be validated in dimensions using a CMM machine.The results obtained indicate that 64.3% of the total measurement of the tower fixture product is within the permissible tolerance range. The rest, as much as 35.7% of measurements are not acceptable because they exceed the tolerance limit given. This is caused by several factors, including human error and inaccuracies in the machining process, causing a difference in dimensions between the design drawings and the original dimensions of the product.

Pemodelan Dan Analisis Pengaruh Adanya Dead Zone Pada Damper Terhadap Respon Dinamis Dan Kenyamanan Kendaraan Auliana Diah Wilujeng, Laily Ulfiyah, Misbakhul Fatah
Techno Bahari Vol 4 No 1 (2017)
Publisher : Politeknik Negeri Madura

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

Fenomena non-linearity banyak terjadi pada shock absorber. Salah satu fenomena non-linearity terjadi pada Regenerative Shock Absorber (RSA). Pada saat rentang kecepatan tertentu, nilai konstanta redaman sama dengan nol, artinya gaya redamannya juga sama dengan nol. Karakteristik redaman seperti ini biasa disebut daerah mati (dead zone). Berawal dari karakterisik ini, penulis melakukan analisis tentang bagaimana respon dinamis dari peredam dengan karakteristik adanya daerah mati jika diaplikasikan pada kendaraan penumpang dan bagaimana kenyamanan kendaraannya. Pemodelan yang digunakan adalah seperempat kendaraan. Input yang digunakan ada dua, yaitu input step dan bump yang telah dimodifikasi yang mewakili transient respon dan input sinusoidal yang mewakili steady state respon. Adapun variabel yang divariasikan yaitu rentang kecepatan relatif antara sprung mass dan unsprung mass serta besar konstanta peredam, Cs+. Kecepatan relatif bervariasi yaitu 0,002 m/s, 0,004 m/s, dan 0,008 m/s. Sedangkan untuk Cs+ bervariasi mulai dari 350 N.s/m, 2000 N.s/m, dan 4000 N.s/m. Untuk input step dan bump yang telah dimodifikasi, terdapat pula variasi dari ? (severity parameter), yaitu 1 (low impact), 5 (severe high impact), dan 20 (more high impact). Sedangkan untuk input sinusoidal variasi hanya dilakukan pada kecepatan kendaraan 0 hingga 100 km/jam dengan interval 0.5 km/jam.Hasil yang didapat menunjukkan bahwa jika dibandingkan dengan sistem asimetri maupun simetri tanpa dead zone, keberadaan rentang dead zone tidak mempengaruhi respon dinamis kendaraan kecuali settling time-nya lebih lama seiring dengan bertambahnya rentang dead zone. Dengan kata lain, keberadaan dead zone menimbulkan ketidaknyamanan terhadap respon dinamis kendaraan. Dari segi kenyamanan ISO 2631, ketahanan pengendara terhadap sistem dead zone pada semua kombinasi yaitu lebih dari 1 jam pada frekuensi di bawah 3 Hz. Sedangkan pada respon transien, baik itu input bump maupun step, sistem asimetri dan simetri tanpa dead zone lebih nyaman daripada sistem dengan dead zone. Hal ini dapat dinyatakan dengan RDR, SDR, maupun SAR. Pada kombinasi 1, semakin kecil nilai indeks performanya, maka dapat dikatakan semakin nyaman

Preliminary Design of Wellhead Spacer Spool Based On the API Acceptance Criteria Budi Baharudin; Rahman Hakim; Rahmat Hidayat; Mohammad Anas Fikri; Auliana Diah Wilujeng
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 6 No. 1 (2021)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v6i1.11879

In the case of assembly wellhead, a spacer spools was used to provide space and connect between parts of the wellhead. In order to design spacer spool with specified material should comply the standards and procedures of the oil and gas industry. The results of the material calculation were using the ASME BPVC guidelines. These three materials strengths were calculated if used as a body spacer spool. Based on acceptance criteria on API 6A 21st Edition, these three materials were categorized as acceptable to be used as a body spacer spool for this specification. These three materials strengths were also calculated the stress of the flange and flange rigidity criteria. Based on the acceptance criteria on ASME BPVC guidelines, the results showed that these materials can be used for flange because it had stress value under yield strength of material which was flange rigidity criteria for operating condition has 0.59 and 0.66 for testing condition because had value of rigidity that met with minimum acceptance criteria.

Simulasi Rangka Engine Trainer dengan Lengan Adaptor sebagai Penunjang Pembelajaran Assembly dan Disassembly Misbakhul Fatah; Rahman Hakim; Auliana Diah Wilujeng; Sayyid Hasan
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1060

Overhaul is a method of engine maintenance where the engine is dismantled and all components are checked and replaced if there is damage. In carrying out overhaul activities, engine trainer tools are needed, therefore the operator can reach the components in the pinch point. Engine trainers on the market are usually only specific to one engine. However, in this study, a universal engine trainer was designed with various adapter arms that can rotate on one axis. This engine trainer is equipped with a buffer that is useful for reducing vibration when the engine is started. The design of the engine trainer frame was tested for strength using a static load simulation with an engine load of 400 N. The simulation showed that the frame deflection due to the load was 0.7781 mm. This value can be said to be safe from a static load test.

PEMBUATAN MATERIAL KOMPOSIT BERBAHAN DASAR SABUT KELAPA DAN JERAMI PADI SEBAGAI PEREDAM KEBISINGAN Auliana Diah Wilujeng; Laily Ulfiyah; Annafiyah Annafiyah; Muhammad Helmi Taqiuddin
Jurnal Technopreneur (JTech) Vol 10 No 1 (2022): JURNAL TECHNOPRENEUR (Mei)
Publisher : UPPM Politeknik Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30869/jtech.v10i1.889

Noise is an environmental problem that needs to be addressed because it not only disturbs comfort but also causes hearing health problems. One of the ways to deal with noise is by installing sound absorbing materials. Sound absorbers commonly used are rockwool or glasswool. However, these materials are quite expensive. Therefore, various types of sound absorbing materials that are cheap and environmentally friendly, namely coconut coir and rice straw. The material made is a circle with a diameter of 100 mm and a thickness of 10 mm. The variation used is the ratio of the quantity of coconut coir and rice straw with gypsum. The variations of the coconut coir and rice straw materials used are 15 grams, 25 grams, and 35 grams. Meanwhile, 400 mL of gypsum is used. Both materials were tested to obtain the sound attenuation coefficient value. The best results obtained from the test are a mixture of coconut coir and gypsum with a sound attenuation coefficient of 0.45.

IDENTIFIKASI SANDWICH PANEL PADA STRUKTUR GELADAK KAPAL Windra Iswidodo; Auliana Diah Wilujeng; Ahmad Mustofa
Majalah Iptek Politeknik Negeri Medan Polimedia Vol. 23 No. 4 (2020): Edisi November
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (525.917 KB)

Pengembangan bahan sandwich untuk struktur kapal ditujukan terutama untuk mengurangi bobot kapal sehingga muatan kapal dapat meningkat. Makalah ini membahas pengembangan bahan inti sandwich yang sesuai untuk struktur kapal. Bahan inti terbuat dari resin sintetis dan talak; Persentase talak dengan berat total yang diteliti adalah 10 persen, 20 persen, 30 persen, dan 40 persen. Uji laboratorium yang disyaratkan oleh Lloyd's Register (LR) dan Det Norske Veritas (DNV) dilakukan pada bahan inti. Selain itu, sandwich panel terdiri dari kulit (faceplate) baja dan bahan inti yang dikembangkan diuji dengan menggunakan standar ASTM termasuk uji tarik, geser, dan lentur untuk mengetahui karakteristik material. sandwich panel digunakan untuk mendesain geladak kendaraan pada kapal jenis ro-ro. Analisis geladak sandwich panel pada beban desain dengan menggunakan pendekatan elemen hingga dilakukan untuk memilih bahan core terbaik yang dikembangkan dalam penelitian ini. Hasil penelitian menunjukkan bahwa material sandwich panel yang terbuat dari bahan inti dengan kandungan talak 40 persen lebih baik dari komposisi yang lain. Selain itu, penggunaan sandwich panel mampu menghasilkan perubahan berat konstruksi sebesar 10,73 persen

Rancang Bangun Turbin Kaplan Variasi Diameter Baling-Baling Untuk Menghasilkan Daya Listrik Amin Jakfar; Misbakhul Fatah; Auliana Diah Wilujeng
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 3 No 2 (2022): AEEJ : Journal of Automotive Engineering and Vocational Education
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v3i2.127

Water energy can be used as a power plant by utilizing the available potential energy (waterfall potential and flow velocity). Today's energy needs are increasing along with the increase in population growth. Kaplan turbine is a turbine composed of propellers/turbine wheel blades such as ship propellers. The Kaplan turbine blades' length and width determine the Kaplan turbine's outer diameter. The outer diameter of the Kaplan turbine will influence the torque generated by the Kaplan turbine. The greater the torque produced, the greater the power obtained. Data collection was carried out to calculate power with five variations of the propeller's diameter, namely 21 cm, 24 cm, 25.8 cm, 27 cm, and 30 cm. s, 0.0133 m3/s, 0.0139 m3/s, and 0.0152 m3/s. The results of the Kaplan turbine test with variations in the blades' diameter and variations in the discharge obtained tremendous power at a diameter of 30 cm with a flow rate of 0.0152 m3/s. Tenaga air yang dalam bahasa Inggris “hydropower” adalah energi yang diperoleh dari air yang mengalir. Air merupakan sumber energi, karena pada air tersimpan energi potensial (pada air jatuh) dan energi kinetik (pada air mengalir). Energi air merupakan energi yang dapat dimanfaatkan sebagai energi pembangkit listrik. Pemanfaatan energi air banyak dilakukan dengan menggunakan turbin air. Turbin Kaplan adalah jenis turbin yang tersusun dari propeller/sudu-sudu roda turbin seperti Diameter luar turbin baling-baling kapal. Kaplan ditentukan oleh panjang dan lebar baling-baling turbin Kaplan. Torsi yang dihasilkan turbin Kaplan akan dipengaruhi oleh diameter luar turbin Kaplan. Semakin besar torsi yang dihasilkan maka semakin besar pula daya yang didapatkan. Untuk menghitung daya maka dilakukan pengambilan data dengan lima variasi diameter baling-baling yaitu 21 cm, 24 cm, 25.8cm, 27 cm, dan 30 cmdan variasi debit pada setiap diameter ada lima, yaitu 0,01 m3/s, 0,0116 m3/s, 0,0133 m3/s, 0,0139 m3/s, dan 0,0152 m3/s. Hasil pengujian turbin Kaplan variasi diameter baling-baling dan variasi debit didapatkan daya terbesar pada diameter 30 cm dengan debit 0,0152 m3/s.

Pengembangan Pusat Unggulan Teknologi, Center Of Heavy Equipment Untuk Mempersiapkan Sdm Bidang Mekanik Dan Operator Alat Berat Yang Kompeten Mohammad Anas Fikri; Ike Dayi Febriana; Laily Ulfiyah; Misbakhul Fatah; Lukman Hadiwijaya; Amin Jakfar; Auliana Diah Wilujeng; Annafiyah Annafiyah; Faizatur Rohmah; Abdul Hamid; Ratna Ayu Pawestri K. D; Septian Dwi Wijaya; Nadiyah Ulfah; Dimas Aryo Wicaksono; Ghopal Ahmad Fachrudin; Eddy Harsono
Journal of Applied Mechanical Engineering and Renewable Energy Vol 3 No 1: Februari2023
Publisher : Indonesian Society of Applied Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52158/jamere.v3i1.438

The low demand for vocational education graduates has led to high unemployment. The low demand for vocational education graduates has led to high unemployment. Vocational college graduates still need to be commensurate with industrial needs. Many Senior High School, Vocational High School, and Vocational College graduates have not been able to find a job for more than six months. Conditions on Madura island worsened this, and the lack of accelerated industrialization even after the Suramadu Bridge was built. Madura has the lowest Human Development Index (HDI) score in East Java. Data from the Central Bureau of Statistics (BPS) Sampang in Figures 2021) shows that the HDI value in 2020 only increased by 0.76 from 2019 of 62.70. Politeknik Negeri Madura (Poltera) together with PT. United Tractors and LSP ABI want to take an active role in improving Madura's HDI by preparing human resources on heavy equipment mechanics through the development of a centre of excellence for technology (PUT) of Heavy Equipment (CHE). Using the causal-comparative method, the researcher observed the impact of each stage on PUT-CHE development activities and reviewed the data to find causal factors and correlations. Poltera took a strategic step by equipping lecturers with virtual training on heavy equipment mechanics (SOBAT Program), organized by PT United Tractors. The SOBAT program has positively impacted heavy equipment engineering graduates in 2022, which has increased significantly. Academic data showed that 13 out of 34 heavy equipment mechanical engineering graduates were employed in leading heavy equipment industries before three months. Other data stated that three lecturers participating in Virtual Training on heavy equipment mechanics were selected as 50 interns at PT United Tractors.

Studi eksperimental variasi media pendingin dan holding time tempering terhadap kekerasan material pengganti pin track link excavator 305.5E2 Auliana Diah Wilujeng; Misbakhul Fatah; Laily Ulfiyah
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 1 (2023): Jurnal TURBO
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i1.2223

The frequency of using heavy equipment that exceeds capacity often occurs in construction projects. This can cause components to fail or wear out as in track link pin components. Therefore, this study aims to obtain a good quality of heat treatment using quenching and tempering methods, to the hardness values of AISI 1045 and AISI 1037 steels for replace the track link pin components of Excavator 305.5E2. In this study, the method of heat treatment is hardening with a temperature of 800℃. After that it is cooled quickly using water and oil media. After that, the specimens were tempered based on differences in holding times of 30, 35, 40 minutes. Specimens that have been heat treated will be tested using a hardness test using the Vickers method. From the results of this study, it was found that the effect of the cooling medium and holding time on the hardness value of AISI 1045 steel. At a holding time of 30 minutes the hardness value was 41.5 HRC. Meanwhile, in water media at a holding time of 30 minutes, the hardness value is 32.2 HRC.

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