Wardany, Ananda Faizati (2019) Analisis Kapabilitas Proses Pada Produk Velg di PT. Meshindo Alloy Wheel Surabaya. Diploma thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Velg menjadi komponen yang berhubungan dengan keselamatan penumpang sehingga velg harus sesuai dengan spesifikasi yang telah ditetapkan. Perusahaan manufakur yang memproduksi velg mobil yaitu PT. Meshindo Alloy Wheel di mana proses casting, pada tahun 2018 menghasilkan produk cacat paling besar sebesar 65,14%. Proses casting memiliki karakteristik cacat yang menjadi Critical To Quality, yaitu susut spoke, susut rim, susut hub, susut face, bocor dan retak. Pada proses casting apabila ditemukan produk cacat maka velg harus dilelehkan kembali, hal tersebut membuat proses selanjutnya terhambat, sehingga perlu dilakukan analis secara statistik untuk mengetahui kebaikan proses dengan menggunakan analisis kapabilitas proses casting pada Fase I di bulan Februari 2019 dan Fase II di bulan Maret 2019, kemudian dilakukan analisis untuk mengetahui akar permasalahan penyebab produk cacat menggunakan diagram ishikawa. Hasil analisis menunjukkan bahwa pada tahun 2018 penyebab 80% produk cacat pada proses casting dikarenakan jenis cacat susut spoke. Proses casting pada Fase I dan Fase II belum kapabel dan terjadi pergeseran proses di mana produksi Fase II lebih baik pada Fase I yang dapat ditunjukkan dengan nilai sigma pada Fase I lebih kecil dari nilai sigma pada Fase II. Faktor – faktor yang menyebabkan produk cacat yaitu banyak pekerja baru, ditemukan ketebalan coating yang tidak sesuai standar, lama waktu pendinginan yang tidak sesuai, mesin bergerak lambat dan cetakan tidak dapat menyerap panas dengan baik
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Wheel becomes a component that is related to passenger safety so that wheel must conform to the specifications specified. The manufacturing company that produces the car wheels of PT. Meshindo Alloy Wheel where the casting process, in 2018 produces the most defective product of 65.14%. casting process has characteristic defects that become Critical To Quality, namely shrinkage spoke, shrinkage rim, shrinkage hub, shrinkage face, leak and crack. In the process of casting if the product is found defective, the rim should be melted back, it makes the process further obstructed, so the analyst needs to be done statistically to know the goodness of the process by using analysis The capabilities of the casting process in phase I in February 2019 and Phase II in March 2019, then analysis to determine the root cause of the defective product using the Ishikawa diagram. The results of the analysis showed that in 2018 cause 80% of products are defective in casting due to the type of defect in the spoke. The casting process in phase I and phase II is not yet used and is a process shift where phase II production is better in phase I which can be demonstrated with the Sigma value at phase I smaller than the Sigma value in phase II. Factors – factors that cause defective products that are many new workers, found the thickness of the coating that does not conform to the standard, long-time cooling is not suitable, slow moving machines and mold can not absorb the heat well.
| Item Type: | Thesis (Diploma) |
|---|---|
| Additional Information: | RSSB 519.5 War a-1 2019 |
| Uncontrolled Keywords: | Casting, Diagram Ishikawa dan Nilai Sigma |
| Subjects: | H Social Sciences > HA Statistics T Technology > TS Manufactures > TS156 Quality Control. QFD. Taguchi methods (Quality control) |
| Divisions: | Faculty of Vocational > 49501-Business Statistics |
| Depositing User: | Wardany Ananda Faizati |
| Date Deposited: | 25 Jul 2019 08:37 |
| Last Modified: | 23 Dec 2022 02:50 |
| URI: | http://repository.its.ac.id/id/eprint/65854 |
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