This study described how the ironing process to manufacture 20 mm caliber bullet case. For this purpose, the first step is analyzing the process parameters, and then calculates the forces needed to make the formation of bullet case. Through the analysis of the process it is known, that the ironing process parameters most influential to the magnitude of forming force are the die angle α and the reduction of the wall thickness. In this study a simulation is conducted to determine a minimum required of forming force until the process successful. That means the required bullet case accordance with the determined specifications and geometry. The material used for bullet case caliber 20 mm is brass Cu30% Zn 70% early-shaped cup with 33.5 mm outer diameter, 3 mm thick and 37 mm high. Based on material strength calculation, the ironing force is determined with value of 50.01 kN. By using this value the maximum allowable wall reduction thickness in the ironing process is 26.7%. The simulation is carried out using finite element method on a variety of die angle such as α = 5°, 10°, 15°, 20° and 25° respectively. The simulation results show that the shell cannot through the die on each angle die. Similarly, in variation of reduction by 5%, 10%, 15%, 20% and 25%, the ironing process is also unsuccessful. However, by load of 138 kN, in the 26.7% reduction and at die angle α=5°, the ironing process to produce cylinder is successfully. Similarly by the same of wall thickness reduction, with force of 148 kN and the die angle of 10°, the ironing process is also successfully to fulfill the bullet case with a specified geometry.
Proses ironing merupakan salah satu proses metal forming. Aplikasi dari proses ini diantaranya pada proses pembuatan selongsong peluru, dimana ketinggian dari dinding tergantung pada reduksi ketebalan yang digunakan. Pada penelitian ini dilakukan simulasi untuk mengetahui berapakan ketinggian dinding berdasarkan variasi reduksi ketebalan dinding sehingga didapatkan ketinggian yang sesuai dengan kebutuhan dalam pembuatan selonsong peluru. Material yang digunakan untuk selongsong peluru kaliber 20 mm adalah kuningan Cu30% Zn 70% berbentuk cup diameter luar awal 33,5 mm, tebal 3 mm dan tinggi 37 mm. Berdasarkan perhitungan kekuatan material, maka didapat reduksi ketebalan dinding maksimum yang diijinkan pada proses ironing adalah 26,7%. Selanjutnya dengan reduksi tersebut dilakukan simulasi menggunakan metode elemen hingga pada variasi sudut die α = 5ᵒ, 10ᵒ, 15ᵒ, 20ᵒ dan 25ᵒ. Hasil simulasi proses ironing pada masing-masing sudut die α dan prosentase reduksi ketebalan dinding 26,7%, menunjukkan, bahwa selongsong peluru belum dapat melawati die. Setelah dilakukan penambahan gaya pada proses simulasi dan dengan variasi reduksi 5%,10%,15%, 20% dan 25%, menghasilkan untuk reduksi 5% :39mm ,10% : 42mm ,15% : 45mm, 20% :51mm dan 25% : 55mm.
In line with the times, the need for product development ideas has a high selling value. Economic value and product efficiency are highly considered in the design, one of which is the design of a stall or café chair. In general, the most used seats are permanent. In other words, it can't adjust when used for a few people or for a lot of people. Therefore it is necessary to design stalls and café chairs that can be stretched or shortened automatically. The purpose of designing this elongated chair is, it can be arranged so that it can be shortened, with this advantage we can save space and expand the space and of course it will be designed according to consumer needs. The elongated chair is made using the Quality Function Deployment (QFD) method. Some methods that must be done, namely the Voice of Customer collection phase, which is done by distributing questionnaires to 25 respondents. The next step is House of Quality based on the results of the questionnaire. After the HOQ is completed, then the analysis and implementation phase of the results obtained at HOQ will be applied to the product design.
The many types of production of goods in a company spearhead the progress of this company in industrial competition in Indonesia, the variety of types of products and large production capacity makes this company need a large number of employees to balance the variety and production capacity. This large number of employees creates its own problems, one of the problems is employee performance appraisal, employee performance appraisal in this company is only centered on the highest supervisor's consideration in one section. From that problem, the researcher wants to solve the problem using the Balanced Score Card (BSC) method by using the determination and weighting of Key Performance Indicators (KPI). The final result of the research conducted at PT Alam Jaya Primanusa in May 2018 the results of the following employee achievement grades and categories: Average material value: 76.65 Fair category, Operator's average value: 85.51 Good category, Average value - Selector section average: 89.79 Good category, Packer section average value: 94.98 Good category, Values in each of these sections become the basis for calculations for all injection division production, so conclusions are drawn for the final value and achievement category of all injection division production the value of 83.37 in the Fair category.
Warehouse as a place that is burdenedwith the task of and items to be used inproduction, until the goods are requestedaccording to the operating schedule. Thepurpose of this study is to find out how toplace, group, and compile items to be orderly.The average results in preparing the PO afterimplementation are proven to be faster thanbefore implementation, so Ho is rejected.Statistical test results with an average ratiothat shows the average time beforeimplementation is 16.37 and the results afterimplementation are 2.04 and it is obviouslythat after implementation there has been asignificant decrease in the service of purchaseorders (PO) more fast.
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