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Project-Based Learning for the Design of Progressive Dies Supporting Tools Hakim, Rahman; Widiastuti, Hanifah; Wijayanti, Ita; Muvariz, Mufti Fathonah; Silaban, Andre Kevil
Jurnal Rekayasa Mesin Vol 12, No 1 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/10.21776/ub.jrm.2021.012.01.13

In the oil and gas industry, manufacturing processes covered a variety of fields including pipe fittings production. Generally, this process involves a press machine utilized as a shape forming using punch-dies sets as mold profiles. The common problem found with the dies is the dimension of dies is not ergonomics to be handled manually by operators. Additionally, the support of dies tends to experience buckling upon receiving a pressure load of 15 MPa. Hence, alternative and practical designs are required, which have low deflection values and high fatigue resistance rates. Additionally, the designs are expected to be safe and economical. In this study, two alternative designs of punch-dies support are proposed. Subsequently, the FEA simulation was carried out for pipe fittings of 8 inches with ASME B16.9 standard size for WF Beam A36 Steel to compare the two proposed designs. The results show that alternative design 2 has a lower deflection value of 0.181 mm, a higher Factor of Safety of 3.21, and a higher cycle time of 358569 cycles than alternative design 1. Nevertheless, alternative design 2 has a higher production cost of 220 USD compared to alternative design 2. Therefore, this study shows that alternative design 2 has better performance while alternative design 1 is more economical.

Comparative Study of Nyamplung (Callophylum inophyllum) Kernel Oil Obtained from Mechanical and Chemical Extraction for Biofuel Production Hanifah Widiastuti; Meiti Pratiwi; Godlief F. Neonufa; Tatang Hernas Soerawidjaja; Tirto Prakoso
Jurnal Rekayasa Proses Vol 13, No 2 (2019)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Nyamplung (Callophylum inophyllum) contains oil around 40-73% in its seed. It has recently gained recognition as a potential source for biofuel production. The oil recovery process from renewable sources such as nyamplung is widely carried out by using chemical extraction with solvents. Nevertheless, this method is considered costly and there are safety issues as well as environmental concerns related to the solvents used. Therefore, mechanical extraction has emerged as an alternative method. In this study, the nyamplung oil recovered by mechanical extraction via hydraulic press and chemical extraction utilizing Soxhlet extraction was compared. Soxhlet extraction was carried out by using n-hexane as a solvent with a temperature of 70 oC for 5 hours. Before the extraction process, the kernel was initially pretreated to reduce the particle sizes and the water content. The results show that the oil yield recovered using the hydraulic press is 58%, which is comparable with the value obtained from Soxhlet extraction (65%). The oil characteristics were also compared, and the profiling shows no significant difference in the properties (saponification value, acid value, and iodine value) of oils recovered using both methods. The composition of fatty acids was also analyzed for utilization as a biofuel feedstock. Higher content of oleic acid was observed in oil resulted from chemical extraction while mechanical extraction yielded oil with higher palmitic acid content.A B S T R A KNyamplung (Callophylum inophyllum) mengandung minyak sebesar 40-73% dalam bijinya dan belakangan ini diakui sebagai sumber potensial untuk pembuatan biofuel. Proses perolehan minyak nabati dari biji nyamplung pada umumnya dilakukan menggunakan ekstraksi kimia dengan pelarut. Akan tetapi, metode ini cenderung berbiaya tinggi serta memiliki isu berkaitan dengan keselamatan proses dan dampak lingkungan berkaitan dengan penggunaan pelarut. Oleh karena itu, metode ekstraksi mekanis banyak dikembangkan sebagai alternatif metode ekstraksi minyak. Dalam penelitian ini, hasil perolehan minyak nyamplung melalui penekanan hidrolik dibandingkan dengan hasil dari ekstraksi Soxhlet. Ekstraksi Soxhlet dilakukan dengan pelarut n-heksana pada suhu 70 oC selama 5 jam. Sebelum proses ekstraksi, biji nyamplung mengalami perlakuan awal terlebih dahulu dengan cara digiling untuk mengurangi ukuran biji dan dipanaskan untuk mengurangi kadar air. Hasil yang diperoleh menunjukkan bahwa yield minyak dari ektraksi mekanik sebesar 58% sementara yield dari ekstraksi Soxhlet adalah 65%. Karakteristik minyak yang dihasilkan melalui kedua metode ini tidak menunjukkan perbedaan yang signifikan dalam hal nilai saponifikasi, nilai asam, dan nilai iodine. Analisis komposisi asam lemak dari kedua minyak yang dihasilkan menunjukkan bahwa minyak yang diperoleh dari ekstraksi kimia mengandung asam oleat dengan persentase yang lebih tinggi sementara minyak dari hasil ekstraksi mekanik memiliki persentase asam palmitat yang lebih tinggi.

Analisa Hasil Kekasaran Permukaan Kayu terhadap Jenis Ketam Rahman Hakim; Hanifah Widiastuti
JURNAL INTEGRASI Vol 9 No 2 (2017): Jurnal Integrasi - Oktober 2017
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v9i2.455

A plane is a tool related to woodworking, which is used for smoothening the surface of the wood. Currently, there are many different smoothing planes available in the market. In this study, the evaluation of a self-made hand plane was conducted. One of the variables that can be utilized to investigate smoothing plane’s performance is by analyzing its wood’s surface smoothening capability. In this reserch, the smoothening capability was evaluated by measuring the wood’s surface roughness after the smoothening process. This study was conducted by utilizing three different types of wood namely limestone wood, meranti wood, and kempas wood as well as three different planes that are a mini plane (self-made tool), a commercial plane, and a power planer. The results show that prior to smoothening process, the maximum surface roughness was 16.432 µm for wet limestone wood and the minimum was 7,871 µm for kempas oven wood. After the smoothening process, the surface maximum roughness values are 10,932 µm using hand mini plane, 12,329 µm for kapur basah wood with the commercial plane for kapur basah wood and minimum roughness of 4,982 µm obtained hand mini plane for meranti oven wood and 5,826 µm for meranti oven wood with the commercial plane. It was also observed that the self-made mini plane gave lower values of surface roughness compared to commercial plane. Thus, it could be summarized that the self-made plane (mini hand plane) is capable to be used for the wood surface smoothening and it has better performance compared to the commercial plane.

ALTERNATIF PENGGANTI PASTA ALUMINA SEBAGAI BAHAN POLISHER UNTUK METALOGRAFI Ari Wibowo; Hanifah Widiastuti; Nurman Pamungkas; Cahyo Budi Nugroho
JURNAL INTEGRASI Vol 12 No 2 (2020): Jurnal Integrasi - Oktober 2020
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v12i2.2022

Polishing have played an important role in the preparation of metallography testing. Poor polishing produce in an unflat and rough surface of the material, resulting an unclear metallography image that is difficult to identified. In general, the material commonly used for polishing is alumina paste. Alumina paste is expensive and takes a few minutes to produce a smooth and flat surface. In this research, polishing was done by using several metal polisher other than alumina paste, these were magic***, auto***, bras**, ki*, menze*** and pri** which are sold cheaply at supermarkets or online stores. Analysis was carried out on the surface of the polishing by these materials and the etching surface. The test results showed that the material that is polished with magic *** has the smoothest surface or has the least residual scratches compared to other materials even compared to alumina paste, but has the disadvantage of corrosion forming on some parts of the surface. The best polishing time was obtained on polishing for 3 minutes

Pengaruh Holding Time Annealing terhadap Perubahan Mikrostruktur Baja Struktur S690QL dan S235JR Ari Wibowo; Hanifah Widiastuti; Nurul Laili Arifin; Nugroho Pratomo Aryanto
JURNAL INTEGRASI Vol 13 No 1 (2021): Jurnal Integrasi - April 2021
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v13i1.2881

The S690 and S235JR structural steels are widely used in heavy equipment for the main frame structure. In general, the fabrication processes of heavy equipment involve welding processes that could change the mechanical properties of the materials. Therefore, in the fabrication process involving those steels, a heat treatment process is carried out after welding to modify the mechanical properties. The heat treatment process is conducted mainly to eliminate residual stresses and to reduce brittleness through the annealing process. In this study, annealing was carried out on the two steels to observe the effect of the heat treatment process on the hardness and microstructure of the material. The annealing process was conducted at 760 oC, holding time varied at 2, 4, 6, 8 and 10 hours, and a cooling rate of 20 oC/hour. After the annealing process, observations with a metallurgical microscope were done to see the final microstructure, followed by testing material hardness using the Rockwell B method. The test results showed that the annealing holding time affected the phases and grain size as well as the hardness of the steel S690 and S235JR. The largest grain size is formed with a holding time of 10 hours while the lowest hardness is also obtained at a holding time of 10 hours. Annealing holding time also affects the phase change from fine bainite to ferrite with large grains on S690 and reduces the size of pearlite on S235JR. The test results also show that long holding time has the potential to cause a decarburization effect on steel.

Comparative Study of Nyamplung (Callophylum inophyllum) Kernel Oil Obtained from Mechanical and Chemical Extraction for Biofuel Production Hanifah Widiastuti; Meiti Pratiwi; Godlief F. Neonufa; Tatang Hernas Soerawidjaja; Tirto Prakoso
Jurnal Rekayasa Proses Vol 13, No 2 (2019)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Nyamplung (Callophylum inophyllum) contains oil around 40-73% in its seed. It has recently gained recognition as a potential source for biofuel production. The oil recovery process from renewable sources such as nyamplung is widely carried out by using chemical extraction with solvents. Nevertheless, this method is considered costly and there are safety issues as well as environmental concerns related to the solvents used. Therefore, mechanical extraction has emerged as an alternative method. In this study, the nyamplung oil recovered by mechanical extraction via hydraulic press and chemical extraction utilizing Soxhlet extraction was compared. Soxhlet extraction was carried out by using n-hexane as a solvent with a temperature of 70 oC for 5 hours. Before the extraction process, the kernel was initially pretreated to reduce the particle sizes and the water content. The results show that the oil yield recovered using the hydraulic press is 58%, which is comparable with the value obtained from Soxhlet extraction (65%). The oil characteristics were also compared, and the profiling shows no significant difference in the properties (saponification value, acid value, and iodine value) of oils recovered using both methods. The composition of fatty acids was also analyzed for utilization as a biofuel feedstock. Higher content of oleic acid was observed in oil resulted from chemical extraction while mechanical extraction yielded oil with higher palmitic acid content.A B S T R A KNyamplung (Callophylum inophyllum) mengandung minyak sebesar 40-73% dalam bijinya dan belakangan ini diakui sebagai sumber potensial untuk pembuatan biofuel. Proses perolehan minyak nabati dari biji nyamplung pada umumnya dilakukan menggunakan ekstraksi kimia dengan pelarut. Akan tetapi, metode ini cenderung berbiaya tinggi serta memiliki isu berkaitan dengan keselamatan proses dan dampak lingkungan berkaitan dengan penggunaan pelarut. Oleh karena itu, metode ekstraksi mekanis banyak dikembangkan sebagai alternatif metode ekstraksi minyak. Dalam penelitian ini, hasil perolehan minyak nyamplung melalui penekanan hidrolik dibandingkan dengan hasil dari ekstraksi Soxhlet. Ekstraksi Soxhlet dilakukan dengan pelarut n-heksana pada suhu 70 oC selama 5 jam. Sebelum proses ekstraksi, biji nyamplung mengalami perlakuan awal terlebih dahulu dengan cara digiling untuk mengurangi ukuran biji dan dipanaskan untuk mengurangi kadar air. Hasil yang diperoleh menunjukkan bahwa yield minyak dari ektraksi mekanik sebesar 58% sementara yield dari ekstraksi Soxhlet adalah 65%. Karakteristik minyak yang dihasilkan melalui kedua metode ini tidak menunjukkan perbedaan yang signifikan dalam hal nilai saponifikasi, nilai asam, dan nilai iodine. Analisis komposisi asam lemak dari kedua minyak yang dihasilkan menunjukkan bahwa minyak yang diperoleh dari ekstraksi kimia mengandung asam oleat dengan persentase yang lebih tinggi sementara minyak dari hasil ekstraksi mekanik memiliki persentase asam palmitat yang lebih tinggi.

Penerapan Keselamatan dan Kesehatan Kerja Pada Proses Perbaikan Kapal Kayu di Daerah Pasir Panjang Sapto Wiratno Satoto; Hendra Saputra; Nidia Yuninarsih; Hanifah Widiastuti; James Siregar; Naufal Abdurrahman Prasetyo; Mufti Fathonah M; Nurman Pamungkas; Sriyanto Sriyanto; Meida Perwira Antartika; Yogantara Yogantara
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol 1 No 1 (2019): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Pusat P2M Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimas.v1i1.1161

Perbaikan dan perawatan kapal merupakan proses yang dilakukan pemilik kapal agar kondisi kapal yang diunakan selalu dalam kondisi prima. Masyarakat pesisir melakukan perbaikan kapal berdasar atas pengalaman yang biasanya diperoleh secara turun temurun. Dalam proses tersebut banyak masyarakat yang kurang peduli dengan resiko keselamatan dan kesehatan kerja. Hal ini bisa terjadi karena msyarakat sering berikir bahwa selama ini kegiatan tersebut tidak masalah sebab mereka tidak pernah sakit. Dengan kurang awamnya masyarakat terhadap masalah tersebut maka perlu diberikan sebuah penyuluhan serta langkah aman dalam melakukan perbaikan kapal yang pasti akan mereka lakukan.

Pengendalian Penularan COVID-19 Melalui Penerapan Non Medical Infant Face Shield (Nomifes) Nidia Yuniarsih; Nurul Laili Arifin; Hanifah Widiastuti; Nugroho Pratomo Ariyanto; Nurul Ulfah; Widodo Widodo; Budi Baharudin; Aulia Fajrin; Muhammad Ismail; Nur Fitria Pujo Leksonowati; Domi Kamsyah; James Siregar; Nurman Pamungkas; Sapto Wiratno Satoto; Mufti Fathonah Muvariz
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol 3 No 1 (2021): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Pusat P2M Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimas polibatam.v3i1.2618

Personel Protective Equipment (PPE), as prevention to curb COVID-19 transmission which mainly via droplet, is a mandatory protocol as rising COVID-19 confirmed case. Face shield can protect face from droplet exposure. Besides health care professionals, pregnant women and newborn infants are susceptible population to exposure of SARS-CoV-2. Infant under two years is not recommended to use face mask due to breahing difficulty which can lead to mortality. Therefore, face shield is recommended for infant to give protection from virus transmission. As part of community service, Politeknik Negeri Batam produces Non Medical Infant Face Shield for infant and toddler to curb COVID-19 transmission. The program aims at community health centers (Puskesmas) of Batu Aji, Tanjung Uncang, Sekupang, and Kampong Jabi Nongsa. These partners value highly the community service program in terms of simplicity, clear working instruction, comfortability, recurring sterilization, and product quality. Moreover, high demand of face shield in Puskesmas that use face shield more than three times a day, indicates benefit of the community service in providing PPE for medical treatment at Puskesmas

Pembuatan Coupling 3 ????⁄????” Mod EU Di PT Elnusa Fabrikasi Konstruksi Benny Haddli Irawan; Yudy Pratama; Budi Baharudin; Rahman Hakim; Hanifah Widiastuti; Widodo Widodo; Ihsan Saputra; Fedia Restu
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 4 No 1 (2022): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2022
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v4i1.3743

Coupling 3 1⁄2” Mod EU (Modified External Upset) is an API 5CT (American Petroleum Institute) product specially made at customer's request, this product is a product that is rarely made at PT ELNUSA FABRIKASI KONSTRUKSI. In this API 5CT product, it is a Modified EU Coupling product which is designed to use an additional ring seal for extra protection on the oil-flowing pipe. To make a 3 1⁄2” Mod EU Coupling, use a CNC lathe by going through the Facing, Blanking ID, Threading ID and Grooving ID processes. The purpose of making this final project is to find out the process carried out and the use of the right method in the manufacture of 3 1⁄2” Mod EU Couplings at PT Elnusa Fabrication Construction, as a learning media or data retrieval, especially when making other Coupling products.

Inspeksi Hasil Sambungan Pengelasan SMAW pada Pembuatan Frame Acid Skid dengan Metode Liquid Penetrant Testing Parlin Jhony Haposan Siagian; Nurul Laili Arifin; Nurul Ulfah; Hanifah Widiastuti
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 4 No 1 (2022): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2022
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v4i1.4014

In this era of globalisation, many industrial companies have been built, especially in the chemical field. Chemical industry companies need a tank to store chemicals production result with a framework design that is nice and strong and can be moved easily. The material used is the type of carbon steel (S275JR) using the SMAW welding process at 6G welding position with intermediate currents in 59 A-134A. The type of joint for the frame is butt-joint, fillet joint and lap joint. In order to guarantee the quality of the welding results, the material will be tested in Non-Destructive Testing with the Inspection method using liquid penetrant, the penetrant method is solvent removable with visible sensitivity at a light level intensity of 1000 lux. The welding results are determined based on acceptance criteria in AWS with ASME as a critical reference. If there no defects or discontinuities like liniear and rounded were found in section of pad eye and base frame, then all welding results will be accepted.

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