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"Additive Manufacturing (AM) adalah metode manufaktur yang menciptakan komponen dengan bentuk kompleks melalui penambahan material layer-by-layer. Meskipun memiliki banyak keuntungan, AM juga memiliki keterbatasan seperti ruang kerja terbatas, yang tergantung pada ukuran bed printer, dan orientasi pencetakan yang memerlukan optimasi untuk mencapai dimensi yang akurat dan mechanical properties dari komponen yang dicetak. Salah satu solusi untuk masalah ini adalah dengan membagi komponen menjadi dua atau lebih bagian untuk dicetak. Hal ini memerlukan perancangan sambungan untuk bagian yang dicetak, sehingga dapat dirakit kembali menjadi bentuk aslinya. Tujuan dari penelitian ini adalah untuk mengidentifikasi metode dan desain terbaik untuk sambungan tersebut. Desain sambungan dioptimasi menggunakan finite element analysis (FEA) untuk memastikan integritas struktural. Penelitian ini juga mengeksplorasi penggunaan Inventor API untuk mengotomatisasi pembuatan bentuk sambungan berdasarkan desain yang dioptimisasi. Hasil penelitian menunjukkan bahwa desain sambungan yang dioptimalkan memiliki nilai maksimum stress yang lebih tinggi namun tetap berada dalam area safety factor, yang memiliki arti desain dapat untuk digunakan dalam manufaktur komponen berukuran besar dalamadditive manufacturing (AM).......Additive Manufacturing (AM) is a manufacturing method that creates components with complex shapes by adding material layer by layer. Despite its advantages, AM has limitations such as a restricted working envelope, which is dependent on the printer bed size, and variable printing orientation that requires optimization to achieve accurate dimensions and mechanical properties of the printed components. One solution to these issues is to divide the component into two or more parts for printing, allowing the final printed component to match the original design. This requires designing joints for the printed parts, enabling them to be reassembled into the original shape. The objective of this research is to identify the best methods and designs for these joints. The joint designs are optimized using Finite Element Analysis (FEA) to ensure structural integrity. The study also explores the use of Inventor API for automating the generation of joint shapes based on the optimized designs. Results indicate that the optimized joint designs exhibit higher maximum stress but remain within the safety factor area, confirming their suitability for use in manufacturing large dimensional parts in additive manufacturing (AM)."

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Perkembangan additive manufacturing dan/atau 3D printing yang sangat pesat tidak hanya memengaruhi bidang manufaktur saja tetapi turut serta memberi pengaruh terhadap bidang kesehatan. Hal ini ditunjukkan dengan mulainya 3D printing diperkenalkan secara klinis untuk pengembangan biomaterial dan biofabrikasi. Adapun keberadaan alat fabrikasi 3D printing, terutama Fused Deposition Modelling (FDM), semakin mudah dijumpai. Sehingga, 3D printing ini menjadi teknologi yang semakin bernilai terutama untuk menghadapi era yang serba cepat. 4D printing merupakan konsep dimana fabrikasi struktur dilakukan secara lapis dan kemudian mengalami perubahan bentuk pasca pemberian stimulus eksternal. Konsep tersebut turut memiliki peluang untuk diimplementasikan terutama pada aplikasi biomedik. Sehingga, diharapkan bahwa 4D printing dapat mengoptimalkan fabrikasi dan pengaplikasian alat kesehatan saat perawatan dilakukan. Di samping itu, Polylactic acid (PLA) sebagai salah satu polimer yang populer digunakan dalam struktur 4D printing memiliki karakteristik yang tepat untuk aplikasi tersebut. Dengan demikian, agar dapat mengetahui konsistensi hasil fabrikasi dan fenomena yang terjadi pada struktur 4D printing dengan material PLA, kalibrasi alat fabrikasi FDM serta perancangan dan fabrikasi struktur dilakukan. Kedua hal tersebut mengindikasikan bahwa parameter proses yang lebih rinci dapat menghasilkan struktur yang sesuai dengan desain. Selain itu, struktur yang dihasilkan memiliki kemampuan untuk bertransformasi secara melengkung pada dua dimensi (bending 2D).

 

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The rapid development of additive manufacturing and/or 3D printing not only affects manufacturing sector but also giving influence towards healthcare field. This is indicated by the beginning of 3D printing introduced clinically for the development of biomaterials and bio fabrication. The presence of 3D printing fabrication machine, especially the Fused Deposition Modelling (FDM) printer, even easier to find. This makes the 3D printing becomes increasingly valuable technology while facing this fast-paced era. 4D printing is a fabrication concept by building the structure layer by layer and then undergoes such a shape transformation due to external stimulus. The concept also has a chance to be applied in biomedical application. Therefore, it is expected that 4D printing could optimize the fabrication and application of medical devices when treatment is carried out. In addition, Polylactic acid (PLA), one of the popular polymers used in the 4D printing, has excellent characteristics for the application. Thus, in order to know the consistency of fabrication results and the phenomena that occur in the PLA 4D printed structure, the calibration of FDM fabrication tools, structural design and fabrication is conducted. Both of those indicate that more detailed process parameters can produce structures that are in accordance with the design. In addition, the resulting structure has the ability in order to transform in a curved manner (bending 2D).

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"Metode Wire Arc Additive Manufacturing (WAAM) merupakan metode yang sedang berkembang saat ini. Metode ini adalah proses produksi yang digunakan untuk 3D print atau memperbaiki bagian logam, yang mengakibatkan metode WAAM sangat potensial dan inovatif. Skripsi ini menyajikan studi awal metode WAAM pada pengelasan dissimilar menggunakan Tungsten Inert Gas (TIG) otomatis, yang melibatkan stainless steel 316 dengan filler aluminium ER5356 dan ER1100, yang bertujuan untuk mencari hasil pengelasan yang terbaik dengan permukaaan yang rapih dan cacat las seminimal mungkin, dengan menggunakan polaritas AC dan DC dan arus 60 A – 170 A. Kecepatan pengelasan konstan di 3.125 cm/s dan gas pelindung menggunakan Argon dengan flowrate konstan sebesar 11 L/min. Hasil yang didapat menunjukkan bahwa pengelasan menggunakan filler ER5356 hanya optimal menggunakan polaritas DC pada arus 160A. Sedangkan filler ER1100 optimal pada range arus 125A – 130A dengan menggunakan polaritas DC dan arus 75A dengan menggunakan polaritas AC. Disarankan menggunakan polaritas DC untuk kedua filler karena hasil manik lebih konsisten. Studi WAAM ini masih tahap awal, maka pengembangan yang lebih lanjut dibutuhkan untuk mendapatkan hasil yang sempurna.......Wire Arc Additive Manufacturing (WAAM) is a method that is currently being developed until now. This method is a production process used for 3D print or to repair metal parts, which makes the WAAM method very potential and innovative. This thesis presents a preliminary study of the WAAM method using automatic Tungsten Inert Gas (TIG) welding, involving stainless steel 316 with aluminium fillers ER5356 and ER1100, which aims to find the best welding results with a clean surface and minimal defects, using both AC and DC polarity, weld current at 60 A – 170 A. The welding speed is constant at 3.125 cm/s and Argon is used as a shielding gas with a constant flowrate of 11 L/min. The results obtained show that welding using ER5356 filler is optimal only using DC polarity at 160A. While the ER1100 filler is optimal in the current range of 125A – 130A using DC polarity and 75A using AC polarity. It is recommended to use DC polarity for both fillers because the bead results are more consistent. This WAAM study is still in its early stages, so more development is needed to get perfect results."

"This book provides details on the innovations made to achieve sustainability in manufacturing. It highlights the trends of current progress in research and development being done to achieve overall sustainability in manufacturing technology. Green-EDM, Hybrid machining, MQL assisted machining, sustainable casting, welding, finishing and casting, energy and resource-efficient manufacturing are some of the important topics discussed in this book."

"This book presents selected proceedings of the International Conference on Production and Industrial Engineering (CPIE) 2018. Focusing on recent developments in the field of production and manufacturing engineering, it provides solutions to wide-ranging contemporary problems in manufacturing engineering and other allied areas using analytical models and the latest numerical approaches. The topics covered in this book include conventional and non conventional machining, casting, welding, materials and processing. As such it is useful to academics, researchers and practitioners working in the field of manufacturing and production engineering.;"

"This book provides a solid background for understanding the immediate past, the ongoing present, and the emerging trends of additive manufacturing, with an emphasis on innovations and advances in its use for a wide spectrum of manufacturing applications. It contains contributions from leading authors in the field, who view the research and development progress of additive manufacturing techniques from the unique angle of developing high-performance composites and other complex material parts. It is a valuable reference book for scientists, engineers, and entrepreneurs who are seeking technologically novel and economically viable innovations for high-performance materials and critical applications. It can also benefit graduate students and post-graduate fellows majoring in mechanical, manufacturing, and material sciences, as well as biomedical engineering."

"This book introduces readers to the theory and practice of extrusion bio-printing of scaffolds for tissue engineering applications. The author emphasizes the fundamentals and practical applications of extrusion bio-printing to scaffold fabrication, in a manner particularly suitable for those who wish to master the subject matter and apply it to real tissue engineering applications. Readers will learn to design, fabricate, and characterize tissue scaffolds to be created by means of extrusion bio-printing technology."

"ABSTRAKValves tipe aktuasi pneumatik telah berhasil digunakan dalam banyak aplikasi lab-on-chip karena biaya rendah dan teknik fabrikasi yang sederhana. Untuk membuat modul katup, penelitian ini menggabungkan beberapa teknik seperti additive manufacturing dan teknologi Computer Numerical Control (CNC) milling juga dengan teknik pembuatan polimer seperti Polydimethylsiloxane (PDMS) dan silikon. Di sini, kami memperkenalkan valves dengan aktuasi pneumatik yang tertutup pada keadaan normal dimana valves menggunakan Thermoplastic Polyurethane (TPU) film yang memiliki fungsi sebagai diafragma pada control chamber. Tingkat tekanan di control chamber dikendalikan oleh vacuum pump untuk menciptakan kondisi vakum dan membuka valves sehingga cairan dapat mengalir. Pada akhir penelitian kami, kami melakukan pengujian pada valves sehingga valves dengan aktuasi pneumatik dapat bekerja sesuai dengan yang kami inginkan.

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ABSTRACTPneumatic actuation type valves have been used successfully in many lab-on-chip applications because of their low cost and simple fabrication techniques. To fabricate valves module, it combine techniques like additive manufacturing and Computer Numerical Control (CNC) milling technology also with polymer fabrication such as Polydimethylsiloxane (PDMS) and silicon. Here, we introduce a normally closed pneumatic actuation valves which using Thermoplastic Polyurethane (TPU) film function as a diaphragm in control chamber. Pressure level in control chamber is controlled by vacuum pump to create vacuum condition and open valves so fluid can flow through. At the end of our study, we tested the valves so pneumatic actuation valves can perform as we desired."

"Selective laser melting (SLM) has established itself as the most prominent additive manufacturing (AM) process for metallic structures in aerospace, automotive and medical industries. For a reliable employment of this process, it has to conform to the demanding requirements of these industries in terms of quasistatic and, especially, fatigue performance. Shafaqat Siddique identifies the influence of SLM processing conditions on the microstructural features, and their corresponding influence on the mechanical behavior of the processed AlSi12 alloy structures. The author also gives insight into integrated manufacturing by combining conventional and SLM processes to get the synergic benefits. Requirements for fatigue-resistant designs in additive manufacturing are highlighted, and a novel method is developed for agile fatigue life prediction."

"Additive Manufacturing (AM) adalah kumpulan teknologi untuk fabrikasi komponen 3D dari sebuah model CAD dengan cara layar per layar. AM memiliki kelebihan seperti menghemat biaya material, waktu fabrikasi yang relatif cepat serta kemampuan untuk fabrikasi struktur rumit. Kelebihan – kelebihan tersebut menjadi AM sangat populer diaplikasikan pada area biomedical terutama bone grafting, scaffolding atau area trauma maxillofacial. Oleh karena itu, studi ini dilakukan untuk menelusuri lebih lanjut mengenai perancangan mesin 3d printer keramik dengan basis plunger type extrusion additive manufacturing serta pengaruh – pengaruh dari variasi parameter cetak guna menghasilkan cara untuk memproduksi biomedical implant basis keramik yang affordable dan sesuai spesifikasi yang didesain. Variasi terhadap nilai parameter cetak meliputi diameter nozzle dari ukuran 1.5 mm, 2 mm, 2.5 mm dan 3 mm, kecepatan cetak 5 mm/s, 10 mm/s, 15 mm/s, dan 20 mm/s serta extrusion flow rate 10 mm3/s, 15 mm3/s, 20 mm3/s, 25 mm3/s. Dari hasil penelitian lebih lanjut, penulis menemukan bahwa nilai optimal dari variasi parameter cetak yang menghasilkan spesimen terakurat dan presisi terhadap desain CAD semula adalah diameter nozzle 2.5 mm, kecepatan cetak 20 mm/s dan extrusion flow rate 25 mm3/s. Selain dari itu, melalui uji ANOVA, penulis juga menemukan bahwa extrusion flow rate memiliki pengaruh paling signifikan terhadap kualitas hasil cetak...... AM is a collection of technologies for fabricating 3D components from a screen-by-screen CAD model. AM has advantages such as saving material costs, relatively fast fabrication time, and the ability to fabricate complex structures. These advantages make AM very popular to be applied in biomedical areas, especially bone grafting, scaffolding, or areas of maxillofacial trauma. Therefore, this study was conducted to explore further the design of a ceramic 3d printer machine with a plunger-type extrusion additive manufacturing base and the effects of variations in printing parameters to generate a way to produce affordable ceramic-based biomedical implants according to the designed specifications. Variations in printing parameter values ​​include nozzle diameters of 1.5 mm, 2 mm, 2.5 mm, and 3 mm, print speeds of 5 mm/s, 10 mm/s, 15 mm/s, and 20 mm/s as well as an extrusion flow rate of 10 mm3 /s, 15 mm3/s, 20 mm3/s, 25 mm3/s. From the results of further research, the authors found that the optimal value of the variation of printing parameters that produce accurate and precise specimens against the original CAD design is a nozzle diameter of 2.5 mm, a print speed of 20 mm/s, and an extrusion flow rate of 25 mm3/s. Apart from that, the ANOVA test also found that the extrusion flow rate had the most significant effect on the quality of the printouts."