Relevant bibliographies by topics / Conventional CNC machining

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Conventional CNC machining'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Conventional CNC machining"

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Jayakrishna, K., R. Jeya Girubha, and S. Vinodh. "Comparison of sustainability characteristics of conventional and CNC turning processes." Journal of Engineering, Design and Technology 14, no. 3 (2016): 422–45. http://dx.doi.org/10.1108/jedt-12-2012-0054.

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Purpose The purpose of this paper is to present the comparison of sustainability characteristics of conventional and computer numerical control (CNC) turning process. The sustainability performance measures of both the processes were also being evaluated. Design/methodology/approach The study discusses the achievement of sustainability characteristics at the manufacturing process level of widely used industrial process, mechanical machining. Sustainable development includes improvements in material, product design and manufacturing process orientations. The present study narrates the sustainab
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Almeida, Sergio Tadeu, John Mo, Cees Bil, Songlin Ding, and Xiangzhi Wang. "Conceptual Design of a High-Speed Wire EDM Robotic End-Effector Based on a Systematic Review Followed by TRIZ." Machines 9, no. 7 (2021): 132. http://dx.doi.org/10.3390/machines9070132.

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Exotic materials such as titanium offer superior characteristics that, paradoxically, make them hard-to-cut by conventional machining. As a solution, electric discharge machining (EDM) stands out as a non-conventional process able to cut complex profiles from hard-to-cut materials, delivering dimensional accuracy and a superior surface. However, EDM is embodied in CNC machines with a reduced axis and machining envelope, which constrains design freedom in terms of size and shape. To overcome these CNC constraints, traditional machining using six-axis industrial robots have become a prominent re
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Zhang, Chun Liang, and Yuan Yuan Wang. "Realization on Cycloid Tooth Profile for CNC Processing." Applied Mechanics and Materials 197 (September 2012): 60–63. http://dx.doi.org/10.4028/www.scientific.net/amm.197.60.

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The machining difficulty of cycloid disk has limited the extensive application of Cycloidal-pin gear planetary mechanism. The conventional machining methods and devices are a main reason. A new method is provided through a 3D software simulation and CNC numerical machining to assure the machining precision of cycloid disk and reduce the machining difficulty. The detail comparisons with old methods are analysized. The modeling and path stimulation are expressed. The NC programs are output. The method can largely reduce the production difficulty of cycloid disk and make high precise cycloidal tr
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Li, Xia, and Hong Bin Liang. "Development of a STEP-NC Controller for 5-Axis Machining of NURBS Surfaces." Advanced Materials Research 317-319 (August 2011): 1940–48. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.1940.

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In conventional machining of free form surfaces, incomplete information exchange between CNC and CAD/CAM results in many limitations need to be rectified. In the paper, a new structure of CNC based on STEP-NC is proposed. A 5-axis real-time interpolator for NURBS surfaces machining is realized. A STEP-NC controller has been developed, which is a software modular CNC system. The CNC system has been installed on a tilt-rotary type 5-axis machine tool. The milling experiment has been performed.
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Woronko, Andrew, Jin Huang, and Yusuf Altintas. "Piezoelectric tool actuator for precision machining on conventional CNC turning centers." Precision Engineering 27, no. 4 (2003): 335–45. http://dx.doi.org/10.1016/s0141-6359(03)00040-0.

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Guo, Peng, Yijie Wu, Guang Yang, et al. "A Feedrate Planning Method for the NURBS Curve in CNC Machining Based on the Critical Constraint Curve." Applied Sciences 11, no. 11 (2021): 4959. http://dx.doi.org/10.3390/app11114959.

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The curvature of the NURBS curve varies along its trajectory, therefore, the commonly used feedrate-planning method, which based on the acceleration/deceleration (Acc/Dec) model, is difficult to be directly applied in CNC machining of a NURBS curve. To address this problem, a feedrate-planning method based on the critical constraint curve of the feedrate (CCC) is proposed. Firstly, the problems of existing feedrate-planning methods and their causes are analyzed. Secondly, by considering both the curvature constraint and the kinematic constraint during the Acc/Dec process, the concept of CCC wh
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Guo, Peng, Ronghua Wang, Zhebin Shen, et al. "A Feedrate-Constraint Method for Continuous Small Line Segments in CNC Machining Based on Nominal Acceleration." Applied Sciences 11, no. 19 (2021): 8837. http://dx.doi.org/10.3390/app11198837.

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When the CNC machining of continuous small line segments is performed, the direction of the machine tool movement will change abruptly at the corner of adjacent line segments. Therefore, a reasonable constraint on the feedrate at the corner is the prerequisite for achieving high-speed and high-precision machining. To achieve this goal, a feedrate-constraint method based on the nominal acceleration was proposed. The proposed method obtains the predicted value of acceleration during the machining process by the machining trajectory prediction and acceleration filtering. Then, the feedrate at the
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Li, Peng, Tian Liang Hu, and Cheng Rui Zhang. "Development of an Ontology-Based and STEP-Compliant Intelligent CNC System." Applied Mechanics and Materials 141 (November 2011): 251–57. http://dx.doi.org/10.4028/www.scientific.net/amm.141.251.

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STEP-NC (ISO 14649) is a newly developed and feature-based machine tool control language for CNC controller. In contrast with conventional G&M code (ISO 6983), this new data model could almost transmit all the designing and planning information for machining parts through CAD&CAPP&CAM to CNC. However, STEP-NC is feasible but not enough to support some intelligent actions such as self-planning, self-learning, decision-making, etc. A complete and well-structured knowledge base is urgently needed to be established to support CNC intelligence. The main work of this paper is focused on
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Álvarez, Álvaro, Amaia Calleja, Mikel Arizmendi, Haizea González, and Luis Lopez de Lacalle. "Spiral Bevel Gears Face Roughness Prediction Produced by CNC End Milling Centers." Materials 11, no. 8 (2018): 1301. http://dx.doi.org/10.3390/ma11081301.

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The emergence of multitasking machines in the machine tool sector presents new opportunities for the machining of large size gears and short production series in these machines. However, the possibility of using standard tools in conventional machines for gears machining represents a technological challenge from the point of view of workpiece quality. Machining conditions in order to achieve both dimensional and surface quality requirements need to be determined. With these considerations in mind, computer numerical control (CNC) methods to provide useful tools for gear processing are studied.
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Conradie, Pieter Johannes Theron, Dimitri Dimitrov, Gert Adriaan Oosthuizen, Philip Hugo, and Mike Saxer. "Comparative assessment of process combination for Ti6Al4V components." Rapid Prototyping Journal 23, no. 3 (2017): 624–32. http://dx.doi.org/10.1108/rpj-10-2015-0153.

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Purpose The purpose of this paper is to investigate the combination of selective laser melting (SLM) and 5-axis CNC milling to produce parts from titanium powder. The aim is to achieve a more resource-efficient manufacturing process by reducing material wastage and machining time, while adhering to quality requirements. Design/methodology/approach A benchmark titanium aerospace component is manufactured with two different approaches using subtractive and additive manufacturing technologies. The first component is produced from a solid billet using only 5-axis CNC milling. The second component
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Dissertations / Theses on the topic "Conventional CNC machining"

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Booysen, G., M. Truscott, D. Mosimanyane, and Beer D. De. "Combining additive fabrication and conventional machining technologies to develop a hybrid tooling approach." Interim : Interdisciplinary Journal, Vol 8, Issue 2: Central University of Technology Free State Bloemfontein, 2009. http://hdl.handle.net/11462/367.

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Published Article<br>South Africa is constantly loosing contracts for the manufacturing of innovative projects to the East, due to its non-competitive mould-making industry. The paper will report on progress made in a specific focus area in mould-making, namely Hybrid Moulds for injection moulding. Hybrid Moulds refers to a hybrid between Additive Fabrication and conventional methods through the use of amongst others, Direct Metal Laser Sintering techniques, combined with conventional CNC machining (High Speed) techniques. Although the emphasis is on an economically viable process for limited
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Straka, Jiří. "Technologie výroby součásti." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230015.

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This diploma thesis is developed within my Master’s degree studies, branch mechanical engineering (M21 K), and specialization in M STM. The aim of this thesis is to solve the technology of mechanical production (machining, tooling) for the machine component called ‚shape lid‘. I execute the analysis of this technology from the perspective of the conventional machining process, and alternatively, some of the non conventional machining process, too. Conventional machining process is so far used for manufacturing of this sort of machine’s element. It‘s implying laborious work difficulties, even i
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Straka, David. "Návrh výrobní technologie desky upínače pásové pily." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-451204.

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This thesis deals with the proposal of production technologies for a band saw clamp plate. Introduction of thesis is focused on problematics about selected component. In the next section, there are described technologies, which were used in the thesis. Practical part is about proposals of conventional and unconventional production methods. Methods are evaluated in the conclusion of thesis.
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Book chapters on the topic "Conventional CNC machining"

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Ranjan, Chikesh, Hridayjit Kalita, B. Sridhar Babu, and Kaushik Kumar. "Application of Evolutionary Optimization Techniques Towards Non-Traditional Machining for Performance Enhancement." In Machine Learning Applications in Non-Conventional Machining Processes. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3624-7.ch011.

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Electro-chemical machining is a non-conventional machining method that is used for machining of very complicated shape. In this chapter an attempt has been made to carry out multi-objective optimization of the surface roughness (SR) and material removal rate (MRR) for the ECM process of EN 19 on a CNC ECM machine using copper electrode through evolutionary optimization techniques like teaching-learning-based optimization (TLBO) technique and biogeography-based optimization (BBO) technique. The input parameters considered are electrolyte concentration, voltage, feed rate, inter-electrode gap. TLBO and BBO techniques were used to obtain maximum MRR and minimum SR. In addition, obtained optimized values were validated for testing the significance of the TLBO and BBO techniques, and a very small error value of MRR and SR was found. BBO outperformed TLBO in every aspect like less percentage error and better-optimized values; however, TLBO took less computation time than the BBO.
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Roy, Supriyo, Kaushik Kumar, and J. Paulo Davim. "Optimization of Process Parameters Using Soft Computing Techniques." In Handbook of Research on Soft Computing and Nature-Inspired Algorithms. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-2128-0.ch006.

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Machining of hard metals and alloys using Conventional machining involves increased demand of time, energy and cost. It causes tool wear resulting in loss of quality of the product. Non-conventional machining, on the other hand produces product with minimum time and at desired level of accuracy. In the present study, EN19 steel was machined using CNC Wire Electrical discharge machining with pre-defined process parameters. Material Removal Rate and Surface roughness were considered as responses for this study. The present optimization problem is single and as well as multi-response. Considering the complexities of this present problem, experimental data were generated and the results were analyzed by using Taguchi, Grey Relational Analysis and Weighted Principal Component Analysis under soft computing approach. Responses variances with the variation of process parameters were thoroughly studied and analyzed; also ‘best optimal values' were identified. The result shows an improvement in responses from mean to optimal values of process parameters.
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Mondal, Sibabrata, and Dipankar Bose. "Evaluation of Surface Roughness in Wire Electrical Discharge Turning Process." In Machine Learning Applications in Non-Conventional Machining Processes. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3624-7.ch008.

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This investigation presents an experimental investigation in developing small cylindrical pins in electrolytic tough pitch copper (ETP Cu) material using wire electrical discharge turning (WEDT) to evaluate surface roughness of the cylindrical turning faces. The material ETP Cu is soft in nature and has growing range of application in the field of aerospace and electronics industries for advanced applications. In this process, a customized rotary spindle has been developed and added to five-axis CNC wire electrical discharge machine (WEDM) and straight turning of the cylindrical pin has been done up to a length of 15mm with 0.5mm diameter. Under this investigation, 31 experiments along with two confirmation tests have been carried out to study the influence of four design factors—pulse on time, pulse off time, spindle speed, and servo voltage—on the machining performance of surface roughness by means the technique of design of experiment (DOE).
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Ameddah, Hacene. "Integrated Kinematic Machining Error Compensation for Impeller Rough Tool Paths Programming in a Step-Nc Format Using Neural Network Approach Prediction." In Artificial Neural Network Applications in Business and Engineering. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3238-6.ch007.

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The most important components used in aerospace, ships, and automobiles are designed with free form surfaces. An impeller is one of the most important components that are difficult to machine because of its twisted blades. This research book is based on the premise that a STEP-NC program can document “generic” manufacturing information for an impeller. This way, a STEP-NC program can be made machine-independent and has an advantage over the conventional G-code-based NC program that is always generated for a specific CNC machine. Rough machining is recognized as the most crucial procedure influencing machining efficiency and is critical for the finishing process. The research work reported in this chapter focuses on introduces a fully STEP-compliant CNC by putting forward an interpolation algorithm for non uniform rational basic spline (NURBS) curve system for rough milling tool paths with an aim to solve the problems of kinematic errors solutions in five axis machine by neural network implementation.
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Xu, Xun. "Development of an Integrated, Adaptable CNC System." In Integrating Advanced Computer-Aided Design, Manufacturing, and Numerical Control. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-714-0.ch013.

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In order to prepare manufacturing companies to face increasingly frequent and unpredictable market changes with confidence, there is a recognized need for CNC machine tools to be further advanced so that they become more integrated with design models and adaptable to uncertain machining conditions. For a CNC system to be able to access any design information, this design information has to be at the task-level, that is what-to-do. For a CNC system to produce the final part, it has to turn the task-level information into method-level information which effectively is the machine control data. These topics are discussed at the beginning of this chapter. The rest of the chapter discusses a CNC native database used for converting the task-level data to method-level data, the methodology of converting the task-level data to methodlevel data, and implementation of the methodology to a conventional CNC machine that employs G-codes. Again both STEP-NC (ISO 14649-1, 2003) and function blocks (IEC 61499, 2005) are used.
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Conference papers on the topic "Conventional CNC machining"

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Wang, Shu-lin, Xing-hua Chen, Gang Liu, and Zun-dong Li. "Hydraulic Micro-feed Actuator for Precision Machining on Conventional CNC Turning Centers." In 2010 International Conference on Electrical and Control Engineering (ICECE). IEEE, 2010. http://dx.doi.org/10.1109/icece.2010.1274.

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Zarifmansour, Sepehr, and Rudolf Seethaler. "Considering Machining Tolerances in High Speed Corner Tracking." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46047.

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Growing industrial demand for faster machine tools, makes feed-rate and trajectory optimization a challenging problem in machining processes. One of the most challenging machining operations for computer numerically controlled (CNC) machine tools is corner tracking. In this scenario, most of the conventional feed-rate optimization approaches sacrifice speed for accuracy. This paper, proposes a new feed-rate and trajectory optimization algorithm for CNC machines. At each corner of the trajectory, the presented algorithm regenerates the trajectory, using a circular move within a desired toleranc
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Mori, Taichi, Yoshitaka Morimoto, Akio Hayashi, Yoshiyuki Kaneko, Naohiko Suzuki, and Ryo Hirono. "Study on Turning of Non-Axisymmetric Three-Dimensional Curved Surfaces." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87377.

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Conventional machining of complex parts having three-dimensional curved surfaces is performed in two steps using a five-axis machining center and a grinding machine. There is a problem with productivity. Therefore, we developed a CNC lathe to cope with high-speed machining. The newly developed CNC lathe has four axes (X1, X2, Z, C). In this machining, the tool on the X axis follows the curved surface synchronously with the rotation angle of the spindle. This cutting method enables machining of the three-dimensional curved surface. By adopting a linear motor for the X axis, high-speed reciproca
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Lin, Yhu-Tin, Chi-Hung Shen, and Pulak Bandyopadhyay. "Production Validation of Agile Machining Fixture: A Machine-Automated Reconfigurable Tooling." In ASME 2007 International Manufacturing Science and Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/msec2007-31161.

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Agile machining fixture is a machine-automated reconfigurable tooling first introduced in 2003. The fixture is reconfigurable and programmable on a CNC machine. To evaluate its viability in production, the agile machining fixture is reconfigured from one machining operation to another for showing its flexibility to processing needs. The fixture is further tested and validated in a low volume production environment to address various challenges in product designs, machine conditions and process details. The good dimensional quality of the production parts machined in this study confirms that th
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Cheng, Kevin, and Sheng-Der Tang. "NURBS-Based Multi-Axis Toolpath for High Speed Machining." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/cie-9111.

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Abstract The NURBS-based toolpath has been considered as an important step forward in computer-aided manufacturing technology for high speed machining applications. Major CNC vendors have found that the NURBS toolpath provides the following benefits over the traditional line string toolpath: more accurate parts, reduced cycle time, improved surface quality, and drastically smaller part programs. This paper presents the technological advancements in the NURBS based toolpath project that Unigraphics Solutions’ CAM group has done since 1996. The NURBS toolpath generator has been implemented to a
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Mane, Hrishikesh, and S. S. Pande. "Adaptive Tool Path Planning Strategy for 5-Axis CNC Machining of Free Form Surfaces." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2737.

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Abstract This paper presents a curvature based adaptive iso-parametric strategy for the efficient machining of free form surfaces on 5-axis CNC machine using the flat end mill tool. One iso-parametric boundary of the surface is selected as the initial tool path. Set of cutter contact (CC) points are chosen adaptively on the initial tool path considering desired profile tolerance. Adjacent iso-parametric tool paths are computed adaptively based on the scallop height constraint unlike the traditional iso-parametric approach. The path topology is post-processed to generate the part program for 5-
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Ahn, Sung H., Juan Plancarte, and Paul K. Wright. "The Impact of Reference Free Part Encapsulation (RFPE) on Design for Manufacturability With CNC Machining." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/dfm-14001.

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Abstract The Reference Free Part Encapsulation (RFPE) is a workholding system which is designed to “free-up” the design space and greatly expand the possible range of the parts that can be designed and then machined. RFPE allows the machining of parts with thin spars and narrow cross-sections. Such parts are often difficult or impossible to hold with conventional vises or toe-clamps. Despite the increased capability of the RFPE technique, its influence on part warpage and part accuracy has not yet been sufficiently documented, and thus the experiments reported here have made a new contribution
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Nakagawa, Kensuke, Taichi Mori, Yoshitaka Morimoto, et al. "Study on Turning of Non-Axisymmetric Three-Dimensional Curved Surfaces." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11100.

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Abstract Conventional machining of complex parts having three-dimensional curved surfaces is done by two processes using a five-axis machining center and a grinding machine. Although these tools make it possible to machine a product with complicated profiles, the tool path is complex and the process is time consuming. Also, because the amount of movement accompanying the control of the tool position increases, the productivity decreases. Therefore, we developed a CNC lathe for high-speed and high-efficiency machining in a previous study. The NC positioning table on which the tool is mounted is
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Sun, Zhenzhou, Alberto Bosio, Luigi Dilillo, et al. "Micro-Abrasive Blasting—A Novel Approach to Local Silicon and Mold Compound Material Removal." In ISTFA 2013. ASM International, 2013. http://dx.doi.org/10.31399/asm.cp.istfa2013p0490.

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Abstract Post silicon validation techniques on Integrated Circuits (IC) specifically FIB circuit editing require backside sample preparation done by local mold compound and silicon machining. Conventional methods such as Computer Numerically Controlled (CNC) machining and chemical etching preparation platforms are commonly used. This paper will investigate a simple alternative approach to local sample preparation by using micro-abrasive blasting. This approach will display its simple natured set-up along with extremely quick process duration.
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Khan, Haris Ali, and Toyosi Ademujimi. "Development of Novel Hybrid Manufacturing Technique for Manufacturing Support Structures Free Complex Parts." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2928.

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Abstract This study unearths a novel approach utilizing conventional subtractive manufacturing technology (5-axis CNC milling center) to realize additively manufactured complex geometries without employing support structures. The proposed approach was based on benefiting from the precision and accuracy of subtractive manufacturing while leveraging the freedom of design of additive manufacturing (AM) process. The desired objectives were achieved in a three-stepped methodology where initially the CNC machine was modified to adapt the 3D printing protocols while in the second step, additional har
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