Gravity die casting is used to manu

Gravity die casting is used to manufacture complex metal components where there is a need for high structural
integrity. In this process, liquid metal is fed from below into the die used to form the component under a
positive pressure.A new approach is developed in [1] for analyzing liquid metal flow in die casting which,
compared with conventional methods which shortens the time required to calculate a solution. The method
allows for generally curved, branched cavities, venting of the cavity gas, energy dissipation at gates, and a
variable injection speed. Number of problems are considered which illustrate the performance of the analysis
under several geometric and process conditions. The effect of the addition of silicon and grain refiner on the
reduction of the susceptibility to cracking was examined in [2] in order to evaluate the susceptibility to cracking,
by both the “I-beam casting cracking test” and the “TIG spot welding cracking test”. In [3] low-pressure die
casting (LPDC) process has been used to produce sound magnesium alloy AM50 castings by considering the
influence of process parameters: filling time, pressure holding time, die temperature, holding pressure and
casting temperature, on the mechanical properties, microstructure and density of LPDC castings. The casting
defects that are caused by molten metal were cold shut formation, entrapment of air, gas, and inclusion. But the control of casting defects has been based on the experience of the foundry engineers. Computer aid ed simulations have been carried out to analyze the flow of molten metal as explained in [4]. During die casting process, liquid melt injected fills die cavity with high velocity, which commonly results in entrapment of gas
and induces final porosities [5]. As per [5] the tensile specimens were obtained from the casting of different parts, and mechanical properties of the specimens were measured. The fractions and maximum size of porosities induced by gas entrainment were analyzed quantitatively. The effect of the fraction and size on the mechanical properties was analyzed and discussed, and the critical porosity fraction and size were proposed for ADC12 die
castings. Advances in modeling of casting processes using smoothed particle hydrodynamics (SPH) are
described in [6] in which three-dimensional simulations of high pressure die casting are presented for two
realistic dies. Developments for both visualization of these systems and for their simulation are described. This paper is organized as; section1 describe literature survey, problem formulation and objectives are stated section 2. Section 3 explore design and modeling of compressor housing, experimental set up is shown in section 4, results & discussion is explained in section5, concluding remark is given in section 6

Hasil (Bahasa Indonesia) 1:

Gravitasi die casting digunakan untuk memproduksi komponen logam yang kompleks dimana ada kebutuhan untuk tinggi struktural integritas. Dalam proses ini, logam cair diberi makan dari bawah ke mati digunakan untuk membentuk komponen di bawah Tekanan positif.Pendekatan baru dikembangkan pada [1] untuk menganalisa aliran logam cair di die casting yang, dibandingkan dengan metode konvensional yang memperpendek waktu yang dibutuhkan untuk menghitung solusi. Metode memungkinkan untuk ventilasi gas rongga, rongga umumnya melengkung, bercabang, disipasi energi di pintu gerbang, dan kecepatan variabel injeksi. Beberapa masalah dianggap yang menggambarkan kinerja analisis dalam beberapa kondisi geometris dan proses. Efek dari penambahan refiner silikon dan gandum pada pengurangan kerentanan terhadap retak diteliti di [2] untuk mengevaluasi kerentanan terhadap retak, oleh "I-beam pengecoran retak ujian" dan "TIG welding tempat retak tes". Di die bertekanan rendah [3] Casting proses (LPDC) telah digunakan untuk menghasilkan suara magnesium alloy AM50 coran dengan mempertimbangkan pengaruh parameter proses: mengisi waktu, tekanan waktu holding, mati suhu, menahan tekanan dan Casting suhu, pada sifat mekanik, mikro dan kepadatan LPDC coran. Casting Cacat yang disebabkan oleh logam cair yang dingin menutup formasi, jebakan udara, gas, dan Inklusi. Tetapi kontrol casting Cacat telah didasarkan pada pengalaman para insinyur pengecoran. Bantuan komputer simulasi ed telah dilaksanakan untuk menganalisa aliran logam cair sebagaimana dijelaskan dalam [4]. Selama die casting proses, cairan yang meleleh disuntikkan mengisi rongga mati dengan kecepatan tinggi, yang sering mengakibatkan jebakan gas dan mendorong akhir sebar [5]. Sesuai [5] spesimen tarik Diperoleh dari casting bagian-bagian yang berbeda, dan sifat mekanik dari spesimen diukur. Pecahan dan ukuran maksimum sebar disebabkan oleh gas entrainment dianalisis secara kuantitatif. Efek sebagian kecil dan ukuran pada sifat mekanik dianalisis dan dibahas, dan fraksi porositas kritis dan ukuran yang diajukan untuk ADC12 mati coran. Kemajuan dalam pemodelan proses casting menggunakan merapikan partikel yang hidrodinamika (SPH) dijelaskan dalam [6] dalam simulasi yang tiga dimensi tinggi tekanan die casting disajikan untuk dua realistis meninggal. Perkembangan untuk visualisasi kedua sistem ini dan untuk simulasi mereka dijelaskan. Tulisan ini disusun sebagai; section1 menggambarkan sastra survei, perumusan masalah dan tujuan yang tercantum Bagian 2. Bagian 3 mengeksplorasi desain dan model perumahan kompresor, eksperimental mengatur ditampilkan di bagian 4, hasil & diskusi dijelaskan dalam section5, menyimpulkan komentar diberikan dalam Bagian 6