Abstrak. Telah dilakukan rancang bangun bending dies untuk pembuatan chassis kendaraan angkutan pedesaan. Chassis yang dihasilkan dengan metoda bending kinerjanya dibandingkan dengan Chassis yang dibuat dengan metoda welding. Hasil analisis statis menggunakan software ANSYS menunjukkan bahwa chassis yang dihasilkan dengan metoda bending dan welding, memiliki kinerja yang hampir sama bila diberi pembebanan bending dan torsi sebesar 2.5 kN. Hasil analisis statis dengan beban bending 2.5 kN menunjukkan bahwa chassis bending mengalami deformasi sebesar 0.36 mm dengan tegangan ekivalen 66.68 MPa dan chassis welding sebesar 0.24 mm dengan tegangan ekivalen 110.97 MPa. Pada analisis statis dengan beban puntir, menunjukkan bahwa chassis bending mengalami deformasi sebesar 10.09 mm dengan tegangan ekivalen 250 MPa dan chassis welding 9.58 mm. Dari hasil analisis statis dengan beban 2.5 kN, menunjukkan bahwa desain chassis bending masih aman terhadap beban yang diberikan (dibawah tegangan yang diijinkan 400 -510 MPa).
Kata Kunci: Rancang bangun, bending dies, Chassis bending, Chassis welding, Analisis statis
PendahuluanIndustri otomotif merupakan salah satu bagian tulang punggung pengembangan ekonomi nasional. Industri komponen otomotif yang kuat diharapkan mendorong potensi enterpreneur otomotif dalam negeri untuk mendesain dan memproduksi jenis mobil dalam rangka mengisi segmen pasar otomotif yang masih terbuka.Untuk dapat memproduksi kendaraan bermotor dengan kriteria desain yang kompetitif, yaitu handal, hemat bahan bakar, dan ramah lingkungan serta sesuai dengan wilayah target pasar, harus dilakukan pengkajian, analisa perhitungan dan desain yang baik sebelum dibuat prototipenya. Setelah dihasilkan desain dibuat prototipe untuk melakukan verifikasi desain dan proses manufacturing,
Identification has been made related to the readiness of the ecosystem development of the batterybased electric vehicle industry in Indonesia. The identification results show that the readiness of providing electricity is still quite safe, there is still a power reserve of more than 30% during peak load. To prepare the charging station still needs to be developed, the number of public electric charging station (SPLU), is still around 7000 units spread throughout Indonesia with a power of 5.5 kVA to 22 kVA, while the number of public electric vehicle charging station (SPKLU) is still around 13 units with a power of 22 kW to 150 kW, spread over 4 cities namely Jakarta, Tangerang, Bandung and Bali. Administrative, technical provisions & roadworthy test readiness, the regulation is now in the finalization stage, one of which is related to sound intensity and classification of electric motors. For two-wheeled electric vehicles and electric buses, currently there is a domestic industry that is developing, but for four-wheeled electric vehicles, there is still not formed, althaugh the drivetrain industry is ready. As for the battery and the handling of the industrial battery waste, it has not yet been formed, it is still in the development of research scale.
This research studies the shaft strength of a BLDC electric motor. A Shaft is one of the components in a rotary engine and functions to transmit power. The design calculation is needed to determine the effect of the strength of the material being treated. The strength analysis of the shaft used FEM (Finite Element Method). The shaft is modeled on the manufacturing design and tested by numerical simulation with Ansys Mechanical 14.5-BRIN commercial license software. The static simulation used a structural statics module with static and dynamic load input. The research method comparing the results of FEM simulations with two different types of materials is determined. Based on the simulation parameters, the selected material types are JIS S45C tempered and AISI 1045 cold-drawn. The simulation results represent the maximum stress (von Mises) and total deformation. The deformation value of S45C tempered material is slightly higher than that of AISI 1045 cold drawn. However, both materials have the same maximum von Mises stress.
Keyword: AISI 1045, Cold drawn, Finite Element Method, Shaft, Static Structure, S45C, Tempered.
Design optimization casting emergency stop valve steam turbine, has been done with casting simulation using Magmasoft v5 software. By simulation, some casting design parameters are changed to get more optimal results. Optimization of the design of castings in this study, obtained by improving the design through changes in pouring system using bottom pouring and optimization of riser design. The result of four design casting simulation ESV housing versus filling velocity, solidification, and porosity have the same trend of location defect that is in the flange and middle body valve connection area. However quality of the simulation results, in design # 4 has a better quality of casting results based on the color gradation seen in the range of 80-90%. Although, there is still a potential defect in critical areas that have low castability. This results can be used as input for the further casting improvement and NDT inspector guidance.
The development of computer aided design (CAE) technology, especially casting simulation software (Magmasoft v5), can be utilized maximally as a tool to verify the design of castings that have been made to be able to meet the elements of QCD (quality, cost, delivery) and compete in the market. This study aims to obtain an optimal ESV housing casting design by reviewing and modifying the casting design in terms of both quality and economics. The process of design optimization with casting simulation is an important step in the design and development of casting products to improve casting yield and casting quality. The optimal design of castings is obtained by improving the design through pouring system using bottom pouring and optimizing the riser design. The results of this study obtained Design # 2 as a design choice of pouring system because it can improve the quality of casting products. Design # 2 optimized again into Design # 4 as the optimum design and able to increase the yield casting by 5.11% from the previous design (Design # 2). The result of techno economic analysis shows that by allocating 4% budget for design cost can contribute to decrease of production cost of foundry ESV housing up to 54,95%.
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