SITEPU, DAVID CHRISTIAN (2020) ANALISIS REJECT DOMINAN PADA MESIN LAS RESISTANCE SPOT WELDING ROTARY PT. SSF TBK. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
PT. Selamat Sempurna Tbk is a company engaged in manufacturing filter production. PT. Selamat Sempurna Tbk has several departments, one of which is the production department 1 press shop spin on which is oriented towards quality and production targets according to schedule. The average amount of production per month is 2,880,705 pcs with an average number of rejects of 269 ppm based on data quality in 2018. To reduce reject production according to standard quality, improvements are made with the fish bone method by applying improvement based on kaizen values. Daichen rotary DC 25 KV resistance spot welding machine at PT. Selamat Sempurna Tbk. There are often reject components that hamper the production process because they have to reproduce the previous supporting components and supply the initial material that is outside the schedule. To find out the cause of the dominant reject and to get information about how to avoid frequent rejection, it is necessary to analyze the production process. In the analysis process, there was a dominant reject, namely Elco Dent reject in December 2018 with a total production of 3,153,442 pcs and a total reject of 197 ppm. To find out the cause of the dent elco, an observation is made. Then from the results of observations for 2 hours based on the fish bone method and December 2018 reject data, it was found that the cause of elco was dented because the position of the elco was often tilted against the ring, so to prevent it from happening a positioning guide was made in the loading elco, so that the elco position could sit perfectly in ring elco. So that it can maintain product quality and increase production results according to schedule and provide benefits to the company. Based on the data after repairs, the reject elco dent decreased to 117 ppm with a total production of 2,941,431 pcs in January 2019. So the decline in reject elco dent was 41%. Keywords: Fish bone, improve, positioning, production , quality, reject, resistence Spot welding, seat assy PT. Selamat Sempurna Tbk merupakan perusahaan yang bergerak dibidang manufaktur produksi filter. PT. Selamat Sempurna Tbk memiliki beberapa departement, salah satunya adalah departement produksi 1 press shop spin on yang berorientasi pada quality dan target produksi sesuai schedule. Jumlah rata-rata produksi perbulan sebesar 2.880.705 pcs dengan jumlah reject rata-rata sebanyak 269 ppm berdasarkan data quality pada tahun 2018. Untuk menurunkan reject produksi sesuai standard quality maka dilakukan perbaikan dengan metode fish bone dengan penerapan improvement berdasarkan nilai kaizen. Mesin las Resistence Spot Welding Daichen rotary DC 25 KV di PT. Selamat Sempurna Tbk. sering terdapat komponen reject yang membuat proses produksi terhambat karena harus memproduksi ulang pada komponen pendukung sebelumnya dan penyediaan material awal yang diluar dari schedule. Untuk mengetahui penyebab reject dominan dan mendapatkan informasi tentang bagaimana agar tidak sering mengalami reject, maka perlu dianalisis proses produksi nya. Dalam proses analisis, terdapat reject dominan yaitu reject elco penyok pada bulan desember 2018 dengan total produksi 3.153.442 pcs dan total reject 197 ppm. Untuk mengetahui penyebab elco penyok, maka dilakukan pengamatan. Kemudian dari hasil pengamatan selama 2 jam berdasarkan metode fish bone dan data reject desember 2018, didapatkan penyebab elco penyok karena posisi elco sering miring terhadap ring, maka untuk mencegah agar tidak terjadi dibuatkan alat pengarah positioning di loading elco, agar posisi elco dapat duduk sempurna di ring elco. Sehingga dapat menjaga quality produk serta meningkatkan hasil produksi sesuai schedule dan memberikan keuntungan terhadap perusahaan. Berdasarkan data setelah dilakukan perbaikan, reject elco penyok turun menjadi 117 ppm dengan total produksi 2.941.431 pcs pada bulan januari 2019. Jadi penurunan reject elco penyok sebesar 41 %. Kata kunci : Fish bone, improve, positioning, produksi , quality, reject, resistence Spot welding, seat assy.
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