Perencanaan Strategi Preventive Maintenance Pada Mesin Shot Blasting di PT. ABC dengan Klasifikasi ISMO

Jurnal Teknologi dan Rekayasa Manufaktur (JTRM)

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Title Perencanaan Strategi Preventive Maintenance Pada Mesin Shot Blasting di PT. ABC dengan Klasifikasi ISMO
Perencanaan Strategi Preventive Maintenance Pada Mesin Shot Blasting di PT. ABC dengan Klasifikasi ISMO
 
Creator Budi Harja, Herman
Riyanto Putra, Aditya
Kresnandi, Wibawa
 
Subject Reliability; Maintenance strategy; Downtime; Complexity mark; Availability;
Reliability
Maintenance strategy
Downtime
Complexity mark
Availability
 
Description A shot blasting machine is a cleaning machine for casting products with a steel ball shooting mechanism from the impeller/blast wheel rotation's centrifugal force. As the main machine in the final process of casting production activities, the decrease in machine reliability has a negative impact on the production system. Currently, the production equipment maintenance strategy at PT ABC is still implementing corrective maintenance, which is unplanned and reactive when a machine malfunction occurs. It resulted in high production loss and increased maintenance costs. Therefore, the shot blasting machine's maintenance strategy should be changed to a type of preventive maintenance. This study aims to plan preventive maintenance (PM) system for the shot blasting machines of PT. ABC, such as creating PM schedule, calculating machine downtime, and technician needs for each PM activity. PM system planning is achieved using the ISMO (Inspection, Small repair, Medium repair, and Overhaul) method. Its method was conducted in several stages, which start with identifying machine objects, making PM work specifications, determining the value of mark complexity and maintenance cycle, calculating machine downtime and technician needs. Then making schedules annual and monthly, and several other maintenance documents. The mechanism for determining the complexity value is determined based on the similarity of the HP Garg methodology's machine specifications. Finally, The planning of the shot blasting machine PM system has been successfully done, some of the PM information obtained are (i) the machine maintenance cycle is C - I1 - I2 - S1 - I3 - I4 - M1 - I5 - I6 - S2 - I7 - I8 - M2 - I9 - I10 - S3 - I11 - I12 - C, (ii) the time interval between maintenance activities is one month, (iii) machine downtime for each shot blasting machine, (iV) the number and level of maintenance technicians required in every ISMO activity for drum shot, batch shot and hanger shot machines. The calculating verification of the shot blasting machine's availability value on the proposed PM schedule shows that machine availability increased to more than 80%.
Mesin shot blasting merupakan mesin pembersih produk hasil pengecoran  dengan mekanisme shoting bola baja dari gaya sentrifugal yang dihasilkan putaran impeller/blast wheel. Sebagai mesin utama dalam proses akhir kegiatan produksi pengecoran, penurunan kehandalan mesin sangat berdampak negatif pada sistem produksi. Saat ini strategi perawatan peralatan produksi di PT ABC masih menerapkan corrective maintenance yang pelaksanaan perawatnnya tidak terencana dan bersifat reaktif saat kegagalan fungsi mesin terjadi. Hal ini mengakibatkan tingginya production loss dan biaya perawatan meningkat. Oleh karena itu strategi perawatan pada mesin shot blasting diubah menjadi jenis perawatan pencegahan (preventive maintenance). Kajian ini bertujuan untuk merencanakan sistem preventive maintenance (PM) mesin-mesin shot blasting PT. ABC berupa pembuatan jadwal PM, perhitungan waktu downtime dan kebutuhan teknisi pada setiap kegiatan PM_nya. Perencanaan sistem PM dicapai menggunakan metode ISMO (Inspection, Small repair, Medium repair dan Overhaul) dan dilakukan dalam beberapa tahapan yaitu identifikasi obyek mesin, membuat spesifikasi kerja PM, menentukan nilai kerumitan dan siklus pemeliharaan, perhitungan tenaga kerja dan waktu downtime mesin, membuat jadwal tahunan dan bulanan, serta beberapa dokumen perawatan lainnya. Mekanisme penentuan nilai kerumitan, ditentukan berdasarkan kemiripan spesifikasi mesin yang terdapat pada metodologi HP Garg. Perencanaan sistem PM mesin shot blasting  telah berhasil dilakukan, beberapa informasi PM yang diperoleh yaitu (i)siklus perawatan mesin adalah C - I1 - I2 - S1 - I3 - I4 - M1 - I5 - I6 - S2 - I7 - I8 - M2 - I9 - I10 - S3 - I11 - I12 – C,  (ii) interval waktu antar kegiatan perawatan sebesar 1 bulan, (iii) waktu downtime kegiatan ISMO untuk mesin drum shot, batch shot dan hanger shot, (iv) jumlah dan level teknisi perawatan yang dibutuhkan pada setiap kegiatan ISMO untuk mesin drum shot, batch shot dan hanger shot. Verifikasi perhitungan nilai availability mesin shot blasting pada usulan jadwal PM diperoleh bahwa availability mesin meningkat menjadi lebih dari 80%.
 
Publisher Politeknik Manufaktur Bandung (Polman Bandung)
 
Date 2021-04-30
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Identifier https://jtrm.polman-bandung.ac.id/index.php/JTRM/article/view/76
10.48182/jtrm.v3i1.76
 
Source Jurnal Teknologi dan Rekayasa Manufaktur ; Vol 3 No 1 (2021): Vol 3 No 1 (2021): Volume: 3 | Nomor: 1 | April 2021
2715-016X
2715-3908
10.48182/jtrm.v3i1
 
Language id
 
Rights Copyright (c) 2021 Politeknik Manufaktur Bandung
https://creativecommons.org/licenses/by-nc-sa/4.0
 

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