Metal stamping industry has Quick Die Change (QDC) as a form of Single Minutes Exchange of Dies (SMED) as an efficient production technique where the implementation depends on operator’s activities, clamping system, accessories type and position, etc. This QDC could apply to improve the process efficiency, control of inventory and reducing the cost. This research compared the traditional metal stamping process and QDC System (QDCS) of metal stamping. This research was using Focused Group Discussion (FGD), direct observation and experiments, conducted in a private metal stamping company in wider Jakarta region of Indonesia. It was observed that the QDCS significantly reduces setup time, storage space and the cost. The setup time and cost reduced to one third of the conventional and the requirement of storage decreased by 70%. In addition, QDCS reduces the waste significantly.
The rapid developing of technology today has forced manufacturing companies to widely expands their business and production abilities. Efficiencies in all aspects must be taken to maximized production capacity and reduce waste to survive. Lean’s SMED technique is one of waste reduction method that usually used in manufacturing companies and specifically called the Quick Die Change (QDC) for metal stamping companies. But some research related to QDC only discuss the setup tools and operator movement during setup and process. This research observed the setup process of the die construction that has been modified to be able to reduce the setup time and other time wasted activities. This QDC die construction could save setup time by 60% compared to conventional die and could do more if carefully planned. Research conducted in an automotive spare parts maker in Jakarta wider region that already use this QDC die in their production line.
Spark plugs have various types and specifications that can improve motorcycle performance. The purpose of this study was to determine the ratio of torque, power, and fuel consumption in a two-stroke gasoline engine produced from standard, platinum, and iridium spark plugs. The method used in this research is to use the one-way variance test method or One-way ANOVA. This test was carried out using a Yamaha F1ZR motorcycle which was carried out using a dyno test tool. The test results for this platinum spark plug have the highest torque reaching 14.78 ft-lbs at 7,500 rpm engine speed, while for standard spark plugs obtained 10.14 ft-lbs. at 7500 rpm engine speed and iridium spark plugs get 9.53 ft-lbs at 7500 rpm engine speed. The highest power is obtained on platinum spark plugs reaching 14.78 hp at 7500 rpm engine speed, while for standard spark plugs 14.47 hp at 7500 rpm engine speed and for iridium spark plug 13.62 hp at 7500 rpm engine speed. The lowest fuel consumption is produced on iridium spark plugs which reaches 0.545 kg/hour at 5000 rpm engine speed, while the highest fuel consumption on platinum spark plugs reaches 0.700 kg/hour at 9000 rpm engine speed.
Kehandalan unit kendaraan bermotor ditentukan 4 hal, diantaranya: sistem pendingin, sistem bahan bakar, sistem pelumasan, sistem pemasukan udara dan gas buang. Dari ketiga sistem tersebut yang mempunyai potensi besar terhadap keandalan kendaraan bermotor adalah sistem pendingin. Proses pembakaran diruang bakar akan menimbulkan panas, dan panas tersebut diserap oleh coolant radiator dan jika air radiator panas akan merusak komponen engine. Tujuan dari penelitian ini melakukan analisis laju aliran fluida terhadap perubahan temperatur untuk menentukan akar penyebab. Adapun metode berbentuk eksperimen yaitu mengetahui pengaruh laju aliran massa fluida, perubahan temperatur fluida masuk dan kapasitas radiator Honda CBR 150 CC. Hasil dari pengumpulan data diperoleh putaran mesin dari 8000, 8500, 9000, 9500 dan 10000 rpm dalam waktu yang divariasikan dari 1 menit sampai 3 menit dengan temperatur masuk (Tin) 90°C, 100°C, dan 110°C. Hasil dari analisa dalam waktu 3 menit pada putaran 8000 rpm didapatkan laju aliran perpindahan panas (Qin) 9185400 watt terjadinya kenaikan temperatur dalam putaran 10000 rpm dengan (Qin) 22680000 watt sedangkan waktu 3 menit pada putaran 8000 rpm didapatkan laju aliran perpindahan panas (Qout) 185887133,8 watt terjadinya kenaikan temperatur dalam putaran 10000 rpm dengan (Qout) 230977553,5 watt.
Sistem injeksi merupakan teknologi yang dapat meningkatkan performa mesin dan efisiensi bahan bakar. Teknologi injeksi bahan bakar (Fuel Injection System) adalah teknologi yang mencampur bahan bakar dengan udara sebelum masuk ke ruang bakar, kemudian disemprotkan dengan tekanan tertentu. Nozzle injektor berperan penting dalam penyemprotan bahan bakar. Terdapat lubang pada ujung nozzle, lubang ini merupakan sarana untuk menginjeksi bahan bakar dengan cara pengabutan. Penelitian ini dimaksudkan untuk mengetahui perubahan torsi dan daya pada sepeda motor honda Beat FI tahun 2014 dengan pembesaran piston 0,75 mm pada jumlah lubang nozzle injektor dengan variasi lubang 4. 6 dan 8 dengan bahan bakar pertamax. Alat yang dilakukan untuk pengujian ini adalah dynotest. Pada penelitian ini didapatkan data berupa kurva dari nilai torsi dan daya pada masing-masing lubang nozzle injektor. Hasil dari penelitian ini mendapatkan torsi dan daya tertinggi pada nozzle injektor lubang 4 dengan torsi maksimum sebesar 6,95 ft-lbs dan daya maksimum sebesar 8,75 HP pada putaran mesin 6.610 rpm. Pada nozzle injektor lubang 6 didapatkan torsi maksimum sebesar 6,82 ft-lbs dan daya maksimum sebesar 8,31 HP pada putaran mesin 6.400 rpm, sedangkan pada injektor lubang 8 didapatkan torsi maksimum sebesar 5,94 ft-lbs dan daya maksimum sebesar 7,14 HP pada putaran mesin 6.310 rpm
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