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All Journal POROS TEKNIK Jurnal Teknik Mesin
Bukhari S
Politeknik Negeri Padang
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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RANCANG BANGUN MESIN PUNTIR UNTUK PEMBUAT BESI TERALIS MODEL SPIRAL SPESIFIKASI BESI KOTAK 10X10X1000 mm Dicky Kurniawan; Safril Safril; Bukhari Bukhari
Jurnal Teknik Mesin Vol 11 No 1 (2018): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

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Abstract

Today the need for housing (home) is increasing. Touch of beauty and support in terms of security are widely used in the construction of the house, one of the trellis. One of the production processes in processing iron trellis is the process of forming spiral iron trellis models of a certain size, in the process special machines are needed that can alleviate, simplify, and accelerate human work. This process is also called cold work because without the heat treatment process. The specifications of the trellis iron torsion machine are 1500x500x800 mm. This machine has several driving units, namely: Motor as a driver, and reducer to reduce the rotation of the shaft on the swivel chuck, and use belt transmission and chains. From the calculation and design of the engine, the motor power of ½ Hp is obtained, the production capacity is 10x10x1000 mm, the shaft diameter is 25.4 mm. The production time of this machine is 7 times / workpiece or ± 2 minutes / Pcs or 29 to 30 Pcs / hour. This trellis iron torsion machine works well and gets a better and stronger spiral model iron box. The components contained in this machine include: Electric motors, pulleys, belts, frames, sprocket, chains, chucks, bearings and speed reducers.
Pengaruh Komposisi Pasir Cetak Terhadap Mutu Cetakan Pasir Coran Aluminium Bukhari Bukhari; Nofriadi Nofriadi; Yanziwar Yanziwar
Jurnal Teknik Mesin Vol 12 No 2 (2019): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

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Casting is a manufacturing procces that use mold and molten metal to make parts. Geometry of the mold is almost same with the product. Shape of sand mold is negative shape of product that according to desire pattern. Making procces of mold must following right composition of sand mold. After through some test, strength of sand mold is depand on composition of mater. Value of the test on table 1 (89% sand, 9% water glass, and 2% water, has tensile strength 0,66 N/mm2 ) and compared to table 3. (85% sand, 9% water glass dan 2% water, has tensile strength 0,415 N/mm2 ). Based on the test, mold with 100% new sand has better collapse is mold with composition 94% new sand, 4% water glass, 2% water, has tensile strength 0,417 N/mm2, but, muld with 50% new sand 50% recycle sand has better collapse is mold with composition 45% new sand, 45% recycle sand, 6% water glass, and 4% water, has tensile strength 0,474 N/mm2.
Troubleshooting Intake Exhaust System Pada Engine C6.4 Excavator Caterpillar Ilham Saputra; Agustion Jufri; Bukhari Bukhari; Nofriadi Nofriadi; Yuli Yetri
POROS TEKNIK Vol. 13 No. 2 (2021)
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/porosteknik.v13i2.1097

Abstract

Terjadinya masalah engine black smoke pada engine C6.4 Caterpillar, ditandai dengan keluarnya asap keabu-abuan cenderung kehitaman, dan ketika diberi tenaga maksimal engine seakan-akan cenderung mati (low power). Untuk mengetahui penyebab kerusakan dan menentukan upaya pencegahan agar kerusakan tidak terulang kembali, telah dilakukan troubleshooting terhadap masalah yang terjadi. Troubleshooting dilakukan dengan 4 tahap yaitu tahap pendefinisian masalah, tahap evaluasi masalah, tahap perbaikan, dan tahap analisa. Dari hasil troubleshooting yang telah dilakukan, ditemukanlah akar masalah penyebab engine black smoke dari engine  C6.4 Caterpillar yaitu rusaknya aftercooler yang mengalami kebocoran yang mengakibatkan udara panas dari turbocharger tidak bisa didinginkan dan udara tidak menjadi padat, sehingga udara yang masuk ke ruang bakar tidak mencukupi sesuai kebutuhan engine. Adapun penyebab terjadinya kerusakan pada aftercooler karena, adanya tekanan dari sebuah benda seperti kayu atau lain sebagainya, yang mengakibatkan sirip-sirip pada aftercooler bengkok dan bocor. Mengenai masalah ini, upaya penanggulangan yang dilakukan adalah penggantian pada aftercooler. Setelah penggantian, dilakukan pengetesan dan engine beroperasi dengan normal.
Co-Authors Agustion Jufri Dicky Kurniawan Ilham Saputra Nofriadi Nofriadi Safril Safril Yanziwar Yanziwar Yuli Yetri