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All Journal Bulletin of Electrical Engineering and Informatics JURNAL TEKNIK MESIN Bulletin of Electrical Engineering and Informatics Bulletin of Electrical Engineering and Informatics Nusantara: Jurnal Pendidikan Indonesia
Riza, Muhammad
Universitas Bandar Lampung
Computer Science & IT Education Electrical & Electronics Engineering Engineering

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Content Comparative Investigation on Tool Wear During End Milling of AISI H13 Steel with Different Tool Path Strategies Erry Yulian T. Adesta; Muhammad Riza; Avicenna Avicenna
Bulletin of Electrical Engineering and Informatics Vol 6, No 4: December 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.396 KB) | DOI: 10.11591/eei.v6i4.852

Abstract

Tool wear prediction plays a significant role in machining industry for proper planning and control machining parameters and optimization of cutting conditions. This paper aims to investigate the effect of tool path strategies that are contour-in and zigzag tool path strategies applied on tool wear during pocket milling process. The experiments were carried out on CNC vertical machining centre by involving PVD coated carbide inserts. Cutting speed, feed rate and depth of cut were set to vary. In an experiment with three factors at three levels, Response Surface Method (RSM) design of experiment with a standard called Central Composite Design (CCD) was employed. Results obtained indicate that tool wear increases significantly at higher range of feed per tooth compared to cutting speed and depth of cut. This result of this experimental work is then proven statistically by developing empirical model. The prediction model for the response variable of tool wear for contour-in strategy developed in this research shows a good agreement with experimental work.
RANCANG BANGUN MESIN PENGECAT OTOMATIS BERBASIS ARDUINO Muhammad Ilham Miranto; Riza Muhida; Muhammad Riza
JURNAL TEKNIK MESIN Vol 9, No 1 (2021): Oktober
Publisher : Universitas Bandar Lampung

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Abstract

Cat adalah cairan yang berfungsi untuk melindungi, memperkuat, dan memperindah. Pada proses pengecatan menggunakan metode penyemprotan (spray) adalah yang paling cepat, tetapi harus mengetahui jarak dan tekanan angin yang sesuai agar tidak terbuang ke udara bebas. Memodifikasi diameter lubang nozzle spray gun dapat dilakukan sehingga dapat menambah efisiensi saat proses pengecatan menjadi lebih cepat, dan tebal. Tetapi saat memodifikasi lubang nozzle spray gun memiliki batas disetiap masing masing type spray gun dalam penelitian ini jenis spray gun yang digunakan adalah type F75 dengan diameter aslinya 1,5mm kemudian dimodifikasi menjadi 1,8mm dan 2mm. Pada type ini saat perluas lubang nozzle lebih dari 2mm Jarum spray gun tidak dapat menutup rapat lubang nozzle sehingga terjadi kebocoran angin pada nozzle dan spray gun tidak efektif. Jarak spray gun ke objek juga sangat mempengaruhi dari pengujian. Maka dapat disimpulkan semakin dekat jarak sprayer ke objek maka ketebalan cat meningkat,  semakin besar diameter nozzle maka hasil pengecatan juga semakin tebal dan setiap type nozzle memiliki batas perluasan diameter lubang nozzlenya.
Content Comparative Investigation on Tool Wear During End Milling of AISI H13 Steel with Different Tool Path Strategies Erry Yulian T. Adesta; Muhammad Riza; Avicenna Avicenna
Bulletin of Electrical Engineering and Informatics Vol 6, No 4: December 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.396 KB) | DOI: 10.11591/eei.v6i4.852

Abstract

Tool wear prediction plays a significant role in machining industry for proper planning and control machining parameters and optimization of cutting conditions. This paper aims to investigate the effect of tool path strategies that are contour-in and zigzag tool path strategies applied on tool wear during pocket milling process. The experiments were carried out on CNC vertical machining centre by involving PVD coated carbide inserts. Cutting speed, feed rate and depth of cut were set to vary. In an experiment with three factors at three levels, Response Surface Method (RSM) design of experiment with a standard called Central Composite Design (CCD) was employed. Results obtained indicate that tool wear increases significantly at higher range of feed per tooth compared to cutting speed and depth of cut. This result of this experimental work is then proven statistically by developing empirical model. The prediction model for the response variable of tool wear for contour-in strategy developed in this research shows a good agreement with experimental work.
Content Comparative Investigation on Tool Wear During End Milling of AISI H13 Steel with Different Tool Path Strategies Erry Yulian T. Adesta; Muhammad Riza; Avicenna Avicenna
Bulletin of Electrical Engineering and Informatics Vol 6, No 4: December 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v6i4.852

Abstract

Tool wear prediction plays a significant role in machining industry for proper planning and control machining parameters and optimization of cutting conditions. This paper aims to investigate the effect of tool path strategies that are contour-in and zigzag tool path strategies applied on tool wear during pocket milling process. The experiments were carried out on CNC vertical machining centre by involving PVD coated carbide inserts. Cutting speed, feed rate and depth of cut were set to vary. In an experiment with three factors at three levels, Response Surface Method (RSM) design of experiment with a standard called Central Composite Design (CCD) was employed. Results obtained indicate that tool wear increases significantly at higher range of feed per tooth compared to cutting speed and depth of cut. This result of this experimental work is then proven statistically by developing empirical model. The prediction model for the response variable of tool wear for contour-in strategy developed in this research shows a good agreement with experimental work.
Enhancing Hard Skill and Soft Skill Learning by Implementing the MBKM Program Zainab Ompu Jainah; Muhammad Riza; Riza Muhida; Yanuar Dwi Prastyo; Intan Nurina Seftiniara
Nusantara: Jurnal Pendidikan Indonesia Vol. 2 No. 1 (2022)
Publisher : Lembaga Sosial Rumah Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/njpi.2022.v2i1-10

Abstract

Education has developed very rapidly marked by the increase in the quality of education and world knowledge. The Indonesian government is trying to improve the quality of education by issuing a policy of Merdeka Belajar Kampus Merdeka (MBKM). This study aims to describe the model for strengthening the role of lecturers and students to improve hard skills and soft skills through MBKM at Bandar Lampung University. This research is descriptive qualitative research. Data collection using observation and documentation techniques. The results showed that the presence of the MBKM activity was a grant of freedom to educational institutions to choose the system of authority needed to create independence from the bureaucracy. With this, it can improve students' hard skills and soft skills: 1) improving soft skills that are more able to appear to interact with communication both verbally and visually effectively based on context, 2) improve soft skills through the competence of the best graduates with integrity and work ethic good and able to adapt to the environment, 3) can analyze the turmoil that occurs in the world of work so that soft skills and hard skills can be further improved, 4) can create innovative and creative works, 5) improve skills in the fields occupied to produce a work competent.
ANALISIS KEKUATAN MEKANIK DARI LIMBAH KULIT KOPI DAN SERAT KULIT JAGUNG SEBAGAI PENGGANTI AGREGAT PADA BETON JENIS POLIMER Riza Muhida; Muhammad Riza; Aqshal Roihan Muhammad Irham
JURNAL TEKNIK MESIN Vol 10, No 1 (2022): Oktober
Publisher : Universitas Bandar Lampung

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Abstract

Provinsi Lampung merupakan daerah dengan penghasil kopi dan jagung tertinggi di Indonesia. Kopi menghasilkan 50 – 60% limbah dan jagung menghasilkan limbah sebanyak 95% dari hasil panen. Beton merupakan jenis material yang banyak digunakan dikehidupan manusia, karena banyaknya penggunaan beton, terdapat aspek yang perlu diperhatikan seperti keawetan dan dampak terhadap lingkungan. Tujuan dari penelitian ini adalah untuk mengetahui kekuatan mekanik dari limbah kulit kopi dan serat kulit jagung sebagai pengganti agregat atau filler pada beton jenis polimer. Pengujian mekanik yang dilakukan meliputi uji kuat tarik dengan standar ASTM D-3039, uji kuat bending dengan standar ASTM D-7264 dan uji kekerasan dengan standar ASTM D-2240. Hasil tertinggi pada uji tarik yaitu pada spesimen S1 sebesar 587 N dengan perbandingan komposisi 5% pasir : 10% batu apung : 8% kulit kopi : 2% serat kulit jagung : 75% resin polyester. Sedangkan hasil tertinggi uji bending yaitu pada spesimen S3 sebesar 53,61 N dengan perbandingan komposisi 5% pasir : 10% batu apung : 5% kulit kopi : 5% serat kulit jagung :75% resin polyester dan nilai kekerasan tertinggi pada spesimen S1 sebesar 75,5 HD
Co-Authors Aqshal Roihan Muhammad Irham Avicenna Avicenna Erry Yulian T. Adesta Intan Nurina Seftiniara Muhammad Ilham Miranto Riza Muhida Yanuar Dwi Prastyo Zainab Ompu Jainah