Design and Topology Optimization of 3D-Printed Wax Patterns for Rapid Investment Casting

Wang, Jiayi; Sama, Santosh Reddy; Lynch, Paul C.; Manogharan, Guha

doi:10.1016/j.promfg.2019.06.224

Cited by 53 publications

(30 citation statements)

References 24 publications

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“…Gambar 2. Tahap pengecoran dengan Investment Casting [8] Temperatur tuang ketika proses pengecoran dan sistem saluran dan cetakan inti dapat mempengaruhi hasil dari produk ini, hal ini dinyatakan juga dalam studi sebelumnya [8], diamana masteratau model awaldirancang sedemikian rupa guna memperlengkapi kelebihan dari pengecoran investment casting. Adapun rancangan yang dibuat dalam penelitian tersebut meliputi dari salurun turun (sprue) dan saluran masuk (gate) kemudian dilakukan perencanaan berdasarkan ketebalan rata-rata dari master yang ditentukan.…”

Section: Gambar 1 Representasi Towing Beam Kapal Tundaunclassified

Analisa Investment Casting Perannya untuk Reparasi Towing Beam Kapal Tunda dengan Metode Elemen Hingga

2020

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Negara kepulauan dapat memanfaatkan laut sebagai media transportasi dan termasuk dalam sarana transportasi dengan kriteria ekonomis dan terjangkau. Sehingga armada pelabuhan di kota-kota pesisir sangat membantu dalam proses loading dan shifting kapal-kapal dengan ukuran besar untuk berlabuh ke sebuah dermaga. Bagian dari kapal tunda yang memiliki peran untuk mengatur dan menarik tali tambang adalah bagian konstruksi towing beam .Konstruksi ini berbahan plat dapat mengalami deformasi akibat beban statis ketika menerima tegangan dari tali tambat yang di hubungkan kepada kapal tongkang. Salah satu upaya untuk memberikan pembaharuan adalah dengan bahan cor, dengan modern investment casting. Sebelum dilakukan pembuatan model castingnya maka perlu dilakukan analisa pada bagian towing beam yang menjadi bagian kekuatan agar menciptakan desain yang optimal dengan metode elemen hingga. Tujuan penelitian ini untuk membandingkan penerapan investment casting pada reparasi towing beam kapal tunda dapat menjadi peluang usaha baru bagi industri manufaktur serta faktor-faktor yang perlu diperhatikan pada saat proses investment casting. Adapun hal-hal yang perlu diperhatikan dalam produksi dengan sistem Investment Casting :konsep desain dari model lilin, penggunaan material, akurasi dimensi, jenis densitas materialnya, lapisan ketebalan dari cetakan, serta model support untuk menahan selama proses pengecoran. Dari hasil analisa tegangan maksimum untuk membuat desain yang optimal dari casting pada daerah pengamatan luar adalah 180.12 N/mm2 dan pada daerah pengamatan dalam adalah 143.34 N/mm2 .Sedangkan untuk penerapan investment casting pada produksi towing beam kapal tunda dapat menjadi peluang usaha baru bagi industri manufaktur karena dapat mempersingkat waktu dengan man power yang sama sebesar 52% atau selisih estimasi waktu 15 jam setara dengan 2,5 hari kerja. dan memperingan biaya fabrikasi bagi industri galangan kapal sehingga mereduksi biaya reparasi 41 % yaitu mengurangi biaya fabrikasi dan quality repair cost

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Section: Gambar 1 Representasi Towing Beam Kapal Tundaunclassified

Analisa Investment Casting Perannya untuk Reparasi Towing Beam Kapal Tunda dengan Metode Elemen Hingga

2020

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“…The designer’s concept becomes a reality due to creating a model using computer numerical control (CNC) techniques [ 7 , 8 , 9 ]. However, to minimize costs and increase the efficiency of the prototyping process and testing of new solutions, additive manufacturing (AM) [ 10 , 11 , 12 , 13 , 14 ] and hybrid methods, e.g., rapid tooling (RT), are used [ 15 , 16 , 17 , 18 ]. In the process of manufacturing final models, metallic materials are still the most often used.…”

Section: Introductionmentioning

confidence: 99%

Estimating the Accuracy of Mandible Anatomical Models Manufactured Using Material Extrusion Methods

Turek

Budzik

2021

Polymers

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The development of new solutions in craniofacial surgery brings the need to increase the accuracy of 3D printing models. The accuracy of the manufactured models is most often verified using optical coordinate measuring systems. However, so far, no decision has been taken regarding which type of system would allow for a reliable estimation of the geometrical accuracy of the anatomical models. Three types of optical measurement systems (Atos III Triple Scan, articulated arm (MCA-II) with a laser head (MMD × 100), and Benchtop CT160Xi) were used to verify the accuracy of 12 polymer anatomical models of the left side of the mandible. The models were manufactured using fused deposition modeling (FDM), melted and extruded modeling (MEM), and fused filament fabrication (FFF) techniques. The obtained results indicate that the Atos III Triple Scan allows for the most accurate estimation of errors in model manufacturing. Using the FDM technique obtained the best accuracy in models manufactured (0.008 ± 0.118 mm for ABS0-M30 and 0.016 ± 0.178 mm for PC-10 material). A very similar value of the standard deviation of PLA and PET material was observed (about 0.180 mm). The worst results were observed in the MEM technique (0.012 mm ± 0.308 mm). The knowledge regarding the precisely evaluated errors in manufactured models within the mandibular area will help in the controlled preparation of templates regarding the expected accuracy of surgical operations.

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“…Together with the rapid development pace of generative design technologies, additive manufacturing allows one to provide significant reduction in the weight of a vehicle, products made of expensive materials, etc. [ 8 , 9 , 10 , 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Indirect Temperature Measurement in High Frequency Heating Systems

Oskolkov

Bezukladnikov

Трушников

2021

Sensors

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One of the biggest challenges of fused deposition modeling (FDM)/fused filament fabrication (FFF) 3D-printing is maintaining consistent quality of layer-to-layer adhesion, and on the larger scale, homogeneity of material inside the whole printed object. An approach for mitigating and/or resolving those problems, based on the rapid and reliable control of the extruded material temperature during the printing process, was proposed. High frequency induction heating of the nozzle with a minimum mass (<1 g) was used. To ensure the required dynamic characteristics of heating and cooling processes in a high power (peak power > 300 W) heating system, an indirect (eddy current) temperature measurement method was proposed. It is based on dynamic analysis over various temperature-dependent parameters directly in the process of heating. To ensure better temperature measurement accuracy, a series-parallel resonant circuit containing an induction heating coil, an approach of desired signal detection, algorithms for digital signal processing and a regression model that determines the dependence of the desired signal on temperature and magnetic field strength were proposed. The testbed system designed to confirm the results of the conducted research showed the effectiveness of the proposed indirect measurement method. With an accuracy of ±3 °C, the measurement time is 20 ms in the operating temperature range from 50 to 350 °C. The designed temperature control system based on an indirect measurement method will provide high mechanical properties and consistent quality of printed objects.

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Design and Topology Optimization of 3D-Printed Wax Patterns for Rapid Investment Casting

Cited by 53 publications

References 24 publications

Analisa Investment Casting Perannya untuk Reparasi Towing Beam Kapal Tunda dengan Metode Elemen Hingga

Analisa Investment Casting Perannya untuk Reparasi Towing Beam Kapal Tunda dengan Metode Elemen Hingga

Estimating the Accuracy of Mandible Anatomical Models Manufactured Using Material Extrusion Methods

Indirect Temperature Measurement in High Frequency Heating Systems

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