当前期刊: CIRP Annals Go to current issue    加入关注   
显示样式:        排序: IF: - GO 导出
我的关注
我的收藏
您暂时未登录!
登录
  • Broaching: Cutting tools and machine tools for manufacturing high quality features in components
    CIRP Ann. Pub Date : 2020-06-25
    Pedro J. Arrazola; Joël Rech; Rachid M'Saoubi; Dragos Axinte

    Broaching is a unique machining process with high accuracy and surface quality, which is employed in mass and batch production for the manufacture of components with highly complex geometries. It involves the use of multiple-edged complex tools in which the cutting edges are arranged with an offset also known as “rise per tooth” that determines the depth of cut per tooth. This paper presents the state-of-the-art

    更新日期:2020-06-25
  • Urban production: State of the art and future trends for urban factories
    CIRP Ann. Pub Date : 2020-06-19
    Christoph Herrmann; Max Juraschek; Peter Burggräf; Sami Kara

    Ongoing urbanization and increasing decentralization of production have increased interest in the urban factory concept. Urban factories are production systems located in an urban environment that make use of the unique resources and characteristics of their surroundings to create products locally with a potentially high degree of customer involvement. This paper explores key technologies and methods

    更新日期:2020-06-19
  • Big data analytics for smart factories of the future
    CIRP Ann. Pub Date : 2020-06-18
    Robert X. Gao; Lihui Wang; Moneer Helu; Roberto Teti

    Continued advancement of sensors has led to an ever-increasing amount of data of various physical nature to be acquired from production lines. As rich information relevant to the machines and processes are embedded within these “big data”, how to effectively and efficiently discover patterns in the big data to enhance productivity and economy has become both a challenge and an opportunity. This paper

    更新日期:2020-06-18
  • Deep learning enhanced digital twin for remote laser welding of aluminium structures
    CIRP Ann. Pub Date : 2020-06-17
    Pasquale Franciosa; Mikhail Sokolov; Sumit Sinha; Tianzhu Sun; Dariusz Ceglarek

    A digital twin framework is presented for assembly systems with compliant parts fusing sensors with deep learning and CAE simulations. Its underlying concept, ‘process capability space,’ updates iteratively during evolving tasks of new product introduction with resulting model fidelity able to simulate dimensional, geometric and weld quality of parts and assemblies; isolate root causes of quality defects;

    更新日期:2020-06-17
  • Interactions of grinding tool and supplied fluid
    CIRP Ann. Pub Date : 2020-06-14
    C. Heinzel; B. Kirsch; D. Meyer; J. Webster

    This paper reviews the physical and chemical interactions between the rotating tool and the supplied fluid in grinding. The mechanisms of this tool-fluid interaction are the key for high performance grinding processes due to an efficient fluid supply resulting in a minimal thermomechanical impact on workpiece and tool. Reduced wear, increased surface finish, suitable subsurface properties of the machined

    更新日期:2020-06-14
  • Dimensional artefacts to achieve metrological traceability in advanced manufacturing
    CIRP Ann. Pub Date : 2020-06-14
    S. Carmignato; L. De Chiffre; H. Bosse; R.K. Leach; A. Balsamo; W.T. Estler

    Dimensional measurements play a central role in enabling advanced manufacturing technologies, enhancing the quality of products and increasing productivity. This role becomes even more important in the context of Industry 4.0, where reliable and accurate digital models of products, processes and production systems are needed. To establish the traceability chain that links measurements in production

    更新日期:2020-06-14
  • Manufacturing of multiscale structured surfaces
    CIRP Ann. Pub Date : 2020-06-13
    Ekkard Brinksmeier; Bernhard Karpuschewski; Jiwang Yan; Lars Schönemann

    Multiscale structured surfaces are a way to provide advanced, otherwise not attainable functionality on a technical part. Applications of such parts can be manifold, and numerous works have already covered the transfer of natural examples into bio-inspired surfaces or the geometrical and functional metrology of such surfaces. After briefly presenting typical functionalities of multiscale structured

    更新日期:2020-06-13
  • Adiabatic blanking of advanced high-strength steels
    CIRP Ann. Pub Date : 2020-06-11
    Fabian Schmitz; Sven Winter; Till Clausmeyer; Martin F.-X. Wagner; A.Erman Tekkaya

    Adiabatic blanking of advanced high-strength steels with initial flow stresses above 1300 MPa is investigated. The blanked edge exhibits a unique S-shape. Localisation and properties of shear bands are analysed in shear-compression tests. A shear-compression stress state before separation leads to blanked edges without fracture zone, burr, or roll-over. Numerical modelling predicts the characteristic

    更新日期:2020-06-11
  • Precompensation of machine dynamics for cutting force estimation based on disturbance observer
    CIRP Ann. Pub Date : 2020-06-11
    Shuntaro Yamato; Yasuhiro Kakinuma

    Complex machine-structure dynamics of a movable stage affects observer-based cutting force estimation. A dynamic compensation approach based on the concept of machine-in-the-loop learning is proposed to enhance the accuracy of cutting force estimation based on a disturbance-observer. Machine dynamics induced estimation errors are pre-compensated by modifying a digital filter representing an inverse

    更新日期:2020-06-11
  • Milling characteristics of VN/AlCrN-multilayer PVD coated tools with lubricity and heat resistance
    CIRP Ann. Pub Date : 2020-06-11
    Akira Hosokawa; Ryo Saito; Takashi Ueda

    The mechanical and tribological characteristics of the VN/AlCrN multilayered coating films are investigated for cutting tools by using the arc ion plating (AIP) method with a rectilinear magnetic filtering system. The VN coating film forms vanadium oxide VxO1–x that has low friction coefficient on a surface above 500°C, whereas AlCrN coatings exhibit higher hot hardness and oxidation resistance. Therefore

    更新日期:2020-06-11
  • New cross-rolling process for joining of hybrid components
    CIRP Ann. Pub Date : 2020-06-10
    Alexander Brosius; Christina Guilleaume

    The proposed innovative cross-rolling process can be used to form hybrid components like shaft hub connections and electric drive parts. The advantages as well as the challenges are discussed in detail, especially the resulting notch geometry and possible approaches for mitigating adverse effects. While the shaft ideally should be a high strength steel, generally any other metal, ceramic or composite

    更新日期:2020-06-10
  • Curling of hot-rolled steel sheet caused by surface oxide scale
    CIRP Ann. Pub Date : 2020-05-29
    Hiroshi Utsunomiya; Ryo Aizawa; Tomoya Fujimoto; Ryo Matsumoto

    Rolled sheets may turn up or down after passing the roll gap. The curling occurs under asymmetric conditions, e.g., different roll speeds, diameters, frictions, etc. Even under apparently symmetric conditions, the curling incidentally occurs in hot rolling. In this study, low carbon sheets with controlled upper and lower oxide scale were hot-rolled with 15% reduction in thickness. The rolled sheets

    更新日期:2020-05-29
  • Tool edge honing using shear jamming abrasive media
    CIRP Ann. Pub Date : 2020-05-29
    Jason Chan; Philip Koshy

    Nature is replete with fascinating landscapes sculpted through interactions with moving fluids. Drawing inspiration from such, this research investigated intriguing mechanisms underlying the novel application of abrasive non-Newtonian media for rounding sharp edges of cutting tools. Through appropriate deformation, these media may be forced to correspond to rapid and reversible variations in viscosity

    更新日期:2020-05-29
  • Determination of the dynamic behaviour of micro-milling tools at higher spindle speeds using ball-shooting tests for the application in process simulations
    CIRP Ann. Pub Date : 2020-05-28
    Petra Wiederkehr; Ines Wilck; Tobias Siebrecht

    The dynamic behaviour of milling processes can be analysed using process simulations based on measured frequency response functions. However, the determination of these functions for micro-milling processes is challenging due to small tool diameters of 1 mm or less, the influence of higher spindle speeds on the dynamic behaviour, and runout errors. Therefore, an approach for analysing micro-milling

    更新日期:2020-05-28
  • Size effect and friction in cutting of metals on the small scale
    CIRP Ann. Pub Date : 2020-05-27
    Gan Feng; Dinakar Sagapuram

    An experimental study of the “size effect” in machining – substantial increase in the specific cutting energy with decrease in chip size – is described. An instrumented ultramicrotomy technique employing “ideally” sharp glass and diamond knives is developed to characterize the forces and specific energies in slow-speed orthogonal cutting of pure copper, with depths of cut in the range of 30 nm to a

    更新日期:2020-05-27
  • Compressive behavior of 420 stainless steel after asynchronous laser processing
    CIRP Ann. Pub Date : 2020-05-22
    M.P. Sealy; H. Hadidi; L.D. Sotelo; W.L. Li; J.A. Turner; J.A. McGeough

    Cold working layers during additive manufacturing improves toughness by imparting a complex glocal integrity across pre-designed internally reinforced domains. Understanding mechanical behavior by mapping glocal integrity across these domains is difficult due to highly heterogeneous compositions formed by cyclic printing and peening. Ultrasound is proposed as a rapid, non-destructive tool to measure

    更新日期:2020-05-22
  • Laser keyhole micro welding of aluminum foils to lap joints even with large gap sizes
    CIRP Ann. Pub Date : 2020-05-21
    Peer Woizeschke; Frank Vollertsen

    The increasing miniaturization of components leads to increasing demands on manufacturing processes. High-brilliance lasers allow fast, low-heat deep penetration laser welding to produce narrow seams even in metal foils. In micro-joining, adjusting comparatively small gaps is a major challenge. Here, the welding of 100 µm thick aluminum foils in lap joints is investigated. Gaps of > 80% of the foil

    更新日期:2020-05-21
  • Study of the electrolyte flow at narrow openings during electrochemical machining
    CIRP Ann. Pub Date : 2020-05-21
    A. Klink; L. Heidemanns; B. Rommes

    Modelling of ECM is a powerful tool to improve the cost- and time intensive tool-development process. However, for certain combinations of process and geometric parameters, the simulation results include non-physical negative pressure values inside the electrolyte flow. These phenomena occur near the narrow opening into the machining gap. According to Bernoulli's law, it is plausible that low-pressure

    更新日期:2020-05-21
  • Advanced generation of functional dual-periodic microstructured surface based on optical in-process measurement
    CIRP Ann. Pub Date : 2020-05-21
    Satoru Takahashi; Shuzo Masui; Masaki Michihata; Kiyoshi Takamasu

    In order to realize dual-periodic microstructured surfaces, which are required for next-generation multi-functional surfaces for various fields, multi-exposure laser interference lithography (MELIL) is recognized as one of the potential fabrication methods. However, MELIL has one critical problem that it is difficult to adjust each exposure energy for adequate multiple exposures before the development

    更新日期:2020-05-21
  • Behavior and process zone formation in powder bed fusion of metals
    CIRP Ann. Pub Date : 2020-05-21
    Eric Eschner; Tobias Staudt; Michael Schmidt

    In powder bed fusion of metals by a laser beam (PBF-LB/M) spatters evolve due to evaporation phenomena within the interaction zone of the laser-beam and material. The evaporation is of high importance for the evolution of a melt depression in the process zone. We use high-speed stereoscopic imaging to measure the three-dimensional (3D) time-resolved spatter trajectories. The statistical spatter behavior

    更新日期:2020-05-21
  • Machine learning approach for systematic analysis of energy efficiency potentials in manufacturing processes: A case of battery production
    CIRP Ann. Pub Date : 2020-05-20
    Sebastian Thiede; Artem Turetskyy; Thomas Loellhoeffel; Arno Kwade; Sami Kara; Christoph Herrmann

    Energy efficiency in manufacturing plays a crucial role in decreasing manufacturing costs and reducing environmental footprint. This is particularly important for producing battery cells with novel processes due to their cost-sensitivity and high potential impact on the environment. Therefore, design and operation of these processes are critical and require a high level of process and machine specific

    更新日期:2020-05-20
  • Capability of a grinding wheel reinforced in hoop direction with carbon fiber
    CIRP Ann. Pub Date : 2020-05-20
    Toru Kizaki; Yu Hao; Tomomi Ohashi; Takafumi Kokubo; Takeshi Nishijima

    Efficient and precise grinding is essential as a finishing process in a number of fields. Performance of a grinding wheel made of carbon fiber reinforced plastic (CFRP) whose fiber orientation was aligned along the circumferential direction was investigated. This wheel was observed to have smaller expansion due to the centrifugal force and thermal stress as well as higher stability against chatter

    更新日期:2020-05-20
  • Non-Newtonian fluid based contactless sub-aperture polishing
    CIRP Ann. Pub Date : 2020-05-20
    Wu-Le Zhu; Anthony Beaucamp

    Compliant polishing (e.g. bonnet polishing) is widely used to finish freeform surfaces. However, direct pad/surface contact often causes scratches or embedding of abrasives, especially on metal moulds. Here, the use of non-Newtonian fluid (polymer and starch) to enable contactless polishing without need for a polishing pad is reported. Modelling and analysis are conducted to reveal the influence of

    更新日期:2020-05-20
  • Raising by spinning
    CIRP Ann. Pub Date : 2020-05-20
    Iacopo M. Russo; Christopher J. Cleaver; Evripides G. Loukaides; Julian M. Allwood

    Industrial metal spinning depends on costly trial-and-error when introducing new products. However, a recently developed flexible spinning setup allows a new form of process operation similar to raising by hammering: two rollers on either side of the rotating workpiece apply a couple to deform it locally whilst moving towards its edge. This paper presents this configuration for the first time and develops

    更新日期:2020-05-20
  • An additive manufacturing-based approach for carbon fiber reinforced polymer recycling
    CIRP Ann. Pub Date : 2020-05-20
    Haihong Huang; Weihao Liu; Zhifeng Liu

    The vast Carbon Fiber Reinforced Polymer (CFRP) waste accumulated is pressing for its recycling. A novel recycling approach, which integrated carbon fiber reclamation and composite additive manufacturing, is proposed to process the CFRP waste into three Dimensional (3D) parts. In the experiments, the CFRP waste was recycled by supercritical n-butanol to yield reclaimed Carbon Fibers (rCFs). The rCFs

    更新日期:2020-05-20
  • A system for designing and 3D printing of porous structures
    CIRP Ann. Pub Date : 2020-05-20
    A.M.M. Sharif Ullah; Hiroki Kiuno; Akihiko Kubo; Doriana Marilena D'Addona

    Porous structures exhibit superior properties compared to their non-porous counterparts, though they are challenging to design and fabricate. This paper presents a self-contained and user-friendly system that designs a porous structure by filling the spaces between a randomly generated point cloud and a closed boundary. It produces the STL dataset of the designed structure. The system generated STL

    更新日期:2020-05-20
  • Method for determining edge chipping in milling based on tool holder vibration measurements
    CIRP Ann. Pub Date : 2020-05-20
    Friedrich Bleicher; Christoph Marcus Ramsauer; Ralf Oswald; Norbert Leder; Paul Schoerghofer

    Process monitoring and in-process control in milling requires reliable sensor data from rotating tooling systems. Vibration sensing by an instrumented tool holder close to the cutting zone has been proven useful in mitigating chatter. A model is presented that enables the interpretation of vibration data of the rotating sensor and tool system to identify edge chipping. Thus, data from a single axis

    更新日期:2020-05-20
  • Fast-tool-servo micro-grooving freeform surfaces with embedded metrology
    CIRP Ann. Pub Date : 2020-05-20
    Zhen Tong; Wenbin Zhong; Suet To; Wenhan Zeng

    To improve machining capability of diamond turning of hierarchical structured surfaces, fast-tool-servo (FTS) turning using a sharp point diamond cutting tool (tool tip width <30 µm) is proposed to generate micro grooves on freeform surfaces. An embedded measurement probe is employed to improve the tool alignment accuracy and also to realise on-machine surface measurement (OMSM) of FTS machined surfaces

    更新日期:2020-05-20
  • Self-organizing network modelling of 3D objects
    CIRP Ann. Pub Date : 2020-05-20
    Hui Yang; Runsang Liu; Soundar Kumara

    Advanced manufacturing is moving towards a new paradigm of ‘low-volume-high-mix’ production. There is an urgent need to develop effective representations of real-world 3D objects and further enable the matching and retrieval of engineering designs. This paper presents a new self-organizing network representation of 3D objects. Each voxel of the 3D object is a node in a network, and the edge is dependent

    更新日期:2020-05-20
  • Prototype for dual digital traceability of metrology data using X.509 and IOTA
    CIRP Ann. Pub Date : 2020-05-20
    Martin Peterek; Benjamin Montavon

    Distributed Sensor Services in cyber physical production systems encounter the need for traceability on a dual level: Data validity along digital processing chains must be verifiable and metrological traceability is required to ensure the measurement's physical validity. Basing on digital calibration certificate approaches in literature and standardized IoT protocols, a fully implemented approach using

    更新日期:2020-05-20
  • Understanding biologicalisation of the snake-skin inspired textures through additive manufacturing for mechanical traction
    CIRP Ann. Pub Date : 2020-05-20
    S. Bapat; C. Tiner; K. Rajurkar; S. Nath; S. Atre; A. Malshe

    This biologicalisation aimed research explores the convergence of bio-inspired design and additive manufacturing for mechanical traction. Snake-skin inspired anisotropic textures having different hierarchical designs were manufactured using a laser powder-bed fusion (L-PBF) process. Laser microscopy was performed to characterize the texture while tribological measurements were performed to understand

    更新日期:2020-05-20
  • Design transcription: Deep learning based design feature representation
    CIRP Ann. Pub Date : 2020-05-20
    Haluk Akay; Sang-Gook Kim

    The task of design feature transcription, or encoding the functional requirements and design parameters of a design, requires representing design data such that a machine can comprehend. Natural language processing, powered by deep neural networks trained on massive corpora of textual data, can map language into distributed vector representation space that machines can understand and retrieve. This

    更新日期:2020-05-20
  • A vision-based machine accuracy measurement method
    CIRP Ann. Pub Date : 2020-05-20
    N. Irino; M. Shimoike; K. Mori; I. Yamaji; M. Mori

    Accuracy measurement in working space is crucial in the evaluation of machine tools and 3D-CMMs. Though tracking type laser interferometers are widely used in the measurements, there are some problems: The devices are inevitably expensive due to their continuous tracking mechanism; Requiring several hours to measure the entire working space. To solve these problems, A vision-based accuracy measurement

    更新日期:2020-05-20
  • Recurrent neural network for motion trajectory prediction in human-robot collaborative assembly
    CIRP Ann. Pub Date : 2020-05-20
    Jianjing Zhang; Hongyi Liu; Qing Chang; Lihui Wang; Robert X. Gao

    Effective and safe human-robot collaboration in assembly requires accurate prediction of human motion trajectory, given a sequence of past observations such that a robot can proactively provide assistance to improve operation efficiency while avoiding collision. This paper presents a deep learning-based method to parse visual observations of human actions in an assembly setting, and forecast the human

    更新日期:2020-05-20
  • Experimental investigation for optimizing the fabrication of a sapphire capillary using femtosecond laser machining and diamond tool micromilling
    CIRP Ann. Pub Date : 2020-05-20
    Kazutoshi Katahira; Yoshinori Ogawa; Shinya Morita; Kazuo Yamazaki

    Sapphire capillaries manufactured with high efficiency and precision are needed for use in laser–plasma accelerators. A hybrid manufacturing process combining femtosecond laser machining and diamond tool micromilling was applied. By using a femtosecond laser mounted on a 5-axis machine, a capillary with a groove width of 630 µm and length of 90 mm was fabricated on a sapphire plate within 5 h. The

    更新日期:2020-05-20
  • A design framework for adaptive digital twins
    CIRP Ann. Pub Date : 2020-05-20
    John Ahmet Erkoyuncu; Iñigo Fernández del Amo; Dedy Ariansyah; Dominik Bulka; Rok Vrabič; Rajkumar Roy

    Digital Twin (DT) is a ‘living’ entity that offers potential with monitoring and improving functionality of interconnected complex engineering systems (CESs). However, lack of approaches for adaptively connecting the existing brownfield systems and their data limits the use of DTs. This paper develops a new DT design framework that uses ontologies to enable co-evolution with the CES by capturing data

    更新日期:2020-05-20
  • Product clustering as a strategy for enhanced plastics recycling from WEEE
    CIRP Ann. Pub Date : 2020-05-20
    J.R. Duflou; A. Boudewijn; D. Cattrysse; F. Wagner; A. Accili; G. Dimitrova; J.R. Peeters

    The ambition to extend material recycling from end-of-life electric and electronic products seems to lead to an unavoidable trade-off between circularity maximisation and quality concerns. However, optimized pre-treatment can help to assure that both polymer fraction compatibility and imperfect separation with the available technologies are fully taken into account to assure maximum plastics recycling

    更新日期:2020-05-20
  • 6 DOF calibration of profile sensor locations in an inspection station
    CIRP Ann. Pub Date : 2020-05-20
    Edward Morse; Prashanth Jaganmohan

    Traditional coordinate measuring systems rely on the accurate kinematics of moving a sensor to the workpiece. This paper describes an instrument using a precision rotary stage to rotate a workpiece with respect to a set of three laser line sensors. The accuracy of the point cloud obtained from a single rotation of the workpiece is dependent on the rotational accuracy of the stage and knowledge of the

    更新日期:2020-05-20
  • Modelling of rotational multiple plain water jets for controlled removal of multi-material coatings
    CIRP Ann. Pub Date : 2020-05-20
    Irati Sanchez; Dragos Axinte; Rob Smith

    Plain Waterjet (PW) technology is an ideal process to remove damaged multi-layer coatings efficiently without damaging the substrate material. This paper proposes a mathematical model that calculates the jet footprint to remove multi-material coatings using a rotational multiple plain water jet nozzle accurately, with the new approach of considering the wear resistance properties of each material layer

    更新日期:2020-05-20
  • High-quality plasma-assisted polishing of aluminum nitride ceramic
    CIRP Ann. Pub Date : 2020-05-20
    Rongyan Sun; Xu Yang; Kenta Arima; Kentaro Kawai; Kazuya Yamamura

    Aluminum nitride (AlN) easily reacts with water when polished using an aqueous slurry. Moreover, grains tend to easily shed off of the AlN surface since it is a sintered material. Thus, obtaining a smooth AlN surface by traditional mechanical polishing techniques is challenging. Herein, we demonstrate plasma-assisted polishing (PAP) that relies on surface modification by plasma irradiation and removal

    更新日期:2020-05-20
  • A 3D Measurement Method for Specular Surfaces based on Polarization Image Sequences and Machine Learning
    CIRP Ann. Pub Date : 2020-05-20
    Lingbao Kong; Xiang Sun; Mustafizur Rahman; Min Xu

    Image highlights caused by specular reflections always conceal or attenuate the feature information of the samples in vision measurement. This paper investigates countermeasures to highlighted specular surface measurements. A measurement system is developed to capture a series of images with different polarization angles, the highlighted regions of which are taken as the trained samples for a back-propagation

    更新日期:2020-05-20
  • Fast and precise pick and place stacking of limp fuel cell components supported by artificial neural networks
    CIRP Ann. Pub Date : 2020-05-20
    Paul Bobka; Felix Gabriel; Klaus Dröder

    The fast and precise automated assembly of limp components to large stacks is a technical challenge. For high voltage fuel cell stacks, hundreds of thin, limp and brittle parts must be stacked precisely. To ensure a robust and fast stacking process, a deviation compensation strategy is presented which allows for increased precision and accuracy through modeling of process-specific deviations. Potential

    更新日期:2020-05-20
  • An evolvable model of machine tool behavior applied to energy usage prediction
    CIRP Ann. Pub Date : 2020-05-19
    Hitoshi Komoto; German Herrera; Jonny Herwan

    There is a growing requirement for models representing machine tool behavior to learn from operational data and adapt themselves in the use stage to various views defined by production managers, machining process designers, and operators. This study formulates these models as evolvable mapping from operational data to process definitions in views pertaining to multiple stakeholders at various temporal

    更新日期:2020-05-19
  • Feeling machine for material-specific machining
    CIRP Ann. Pub Date : 2020-05-19
    Benjamin Bergmann; Matthias Witt

    In the machining of material compounds, materials with differing properties must be identified during the process and process parameters must be controlled accordingly. Structure integrated strain gauges in feeling machines are a promising approach for providing signals for monitoring and control tasks. This paper presents the first investigation and implementation of this technology for a turning

    更新日期:2020-05-19
  • Bio-inspired generative design for support structure generation and optimization in Additive Manufacturing (AM)
    CIRP Ann. Pub Date : 2020-05-19
    Yicha Zhang; Zhiping Wang; Yancheng Zhang; Samuel Gomes; Alain Bernard

    Additive Manufacturing (AM) is widely used to manufacture complex and personalized medical components. However, the generation and manually removing of support structures in the pre- and post-processing stages are still time-consuming and costly. To improve the automation of preparation while reducing support structure volume, post-processing time and cost, this paper proposes a bio-inspired generative

    更新日期:2020-05-19
  • Grinding of additively manufactured silicon carbide surfaces for optical applications
    CIRP Ann. Pub Date : 2020-05-19
    Nicholas Horvath; Andrew Honeycutt; Matthew A. Davies

    Many of the properties of Silicon carbide (SiC) are advantageous for optical applications, such as telescope mirrors and industrial laser systems. However, the base shapes of complex components are costly and difficult to manufacture. Leveraging additive manufacturing, near net complex components are readily processed. Here, we investigate the post processing of additively manufactured SiC (AM SiC)

    更新日期:2020-05-19
  • Local magnetic deterioration on work-hardening layer of FeSiB metallic glass by milling
    CIRP Ann. Pub Date : 2020-05-19
    Zhenglong Fang; Masayuki Nakao

    FeSiB metallic glass has good soft magnetic properties as a magnetic core material because of high permeability of amorphous matrix. Plastic-strain induced local magnetic deterioration by milling should be prevented. This work presents the results on local magnetic deterioration in the work-hardening layer. Local magnetic fields and crystallization conditions were characterized by micro magnetic induction

    更新日期:2020-05-19
  • Development of a Process Signature for Electrochemical Machining
    CIRP Ann. Pub Date : 2020-05-18
    Thomas Bergs; Simon Harst

    Electrochemical machining (ECM) principally enables a highly productive and virtually wear-free production of components with simultaneously high surface quality. However, the process generates changes concerning both the geometry as well as the rim zone of manufactured components, so that the entire process design currently runs through several heuristic cycles. As a result, the cost-effectiveness

    更新日期:2020-05-18
  • Forming induced interface structures for manufacturing hybrid metal composites
    CIRP Ann. Pub Date : 2020-05-18
    Welf-Guntram Drossel; Matthias Riemer; Peter Scholz; Tomasz Osiecki; Lothar Kroll; Mariusz Frankiewicz; Waldemar Skomudek

    The performance of hybrid metal composite parts strongly depends on the properties of the mechanical interface between the two components as well as on the deformation behavior. A combination of different joining mechanisms (e.g. adhesive bonding, mechanical form-fit) offers enhanced interface performance. This paper shows a novel interface concept based on form-fit elements induced by forming. Compared

    更新日期:2020-05-18
  • Adaptive network analytics for managing complex shop-floor logistics systems
    CIRP Ann. Pub Date : 2020-05-18
    Dávid Gyulai; Júlia Bergmann; József Váncza

    The paper suggests a novel workflow to solving adaptively the automated guided vehicle (AGV) fleet management problem with the key objective to serve production flawlessly. Departing from a material flow network model it is shown how an analysis using recent notions and methods of network science can detect the hidden structure of the overall problem. Once uncovered, this modularity-based structuring

    更新日期:2020-05-18
  • Modal analysis of machine tools using visual vibrometry and output-only methods
    CIRP Ann. Pub Date : 2020-05-18
    Mohit Law; Pulkit Gupta; Suparno Mukhopadhyay

    This paper presents visual vibrometry as a new video camera-based vibration measuring technique for machine tools. Pixels within images from recordings of the vibrating machine are treated as motion sensors to detect and track vibrating edges. Modal parameters are extracted from the measured pixel-displacement time series data using output-only mass-change methods. Methods are experimentally demonstrated

    更新日期:2020-05-18
  • Cooperative multi-agent system for production control using reinforcement learning
    CIRP Ann. Pub Date : 2020-05-18
    Marc-André Dittrich; Silas Fohlmeister

    Multi-agent systems can limit the control problem in complex production systems and solve them more efficiently. However, they often show local optimization tendencies. This paper presents a novel approach for a cooperative multi-agent system, which uses reinforcement learning and considers global key performance indicators. For this purpose, a central deep q-learning module transfers its knowledge

    更新日期:2020-05-18
  • Tuning of shape memory polymer properties by controlling 3D printing strategy
    CIRP Ann. Pub Date : 2020-05-18
    Alnto Koualiarella; Apostolos Arvanitidis; Apostolos Argyros; Charoula Kousiatza; Anargyros Karakalas; Dimitris Lagoudas; Nikolaos Michailidis

    Unique thermal shape recovery and chemical stability make Shape Memory Polymers (SMPs) attractive for critical applications in biomedical, aerospace and energy sectors. While additive manufacturing (AM) of SMPs allows fabrication of functionally-graded structures with tailored, intricate design features, the effect of AM on shape recovery characteristics has not received much attention. To demonstrate

    更新日期:2020-05-18
  • Development of an innovative, high speed, large-scaled, and affordable metal additive manufacturing process
    CIRP Ann. Pub Date : 2020-05-18
    Hoa Xuan Nguyen; Hawke Suen; Bibek Poudel; Patrick Kwon; Haseung Chung

    This paper introduces a new additive manufacturing (AM) process which significantly improves the productivity of the current metal AM technologies by combining binder jet printing and stereolithography principles. Three dimensional objects can be printed on a powder bed system where photopolymerization takes place by selectively curing the suspensions containing metallic powder and ultraviolet curable

    更新日期:2020-05-18
  • Straightness, flatness and cylindricity characterization using discrete Legendre polynomials
    CIRP Ann. Pub Date : 2020-05-18
    Han Haitjema

    In dimensional metrology the straightness, flatness or cylindricity of surfaces is commonly measured at a limited number of equidistant points on the surface. This paper describes some opportunities and characteristics of discrete Legendre polynomials to describe and analyze such measurements. The reference surface can be adequately described using a few lower order polynomials while the higher order

    更新日期:2020-05-18
  • Opportunistic maintenance for multi-unit series systems based on gated recurrent units prediction model
    CIRP Ann. Pub Date : 2020-05-18
    Luning Bi; Fei Tao; Pengyuan Zhang; A.Y.C. Nee

    Maintenance plays an important role in sustainable manufacturing as systematic and timely MRO processes can significantly reduce downtime and production losses. This paper presents a two-stage approach for an opportunistic maintenance methodology. Firstly, a real-time gated recurrent units (GRU) model is established to predict the reliability of facilities. Secondly, an ensemble evolutionary algorithm

    更新日期:2020-05-18
  • A testing method of cold forging performance of steel wires
    CIRP Ann. Pub Date : 2020-05-18
    Z.G. Wang; T. Hakoyama; Y. Takaya; N. Ibaraki; K. Osakada

    The flow stress of wire material, the friction coefficient and the sticking capability of the lubrication coating on the wire surface are evaluated with a single test. In this test, the specimen cut off from the end of a wire coil is set on a V-groove die and then is compressed into the V-groove by a punch. Friction coefficient is determined by the ratio of the punch load and the die load. The flow

    更新日期:2020-05-18
  • Locally heat-assisted torsion forming of metal tubes for improvement of mechanical properties based on microstructure control
    CIRP Ann. Pub Date : 2020-05-18
    Tsuyoshi Furushima; Naoki Mashiwa; Kanta Sasaki

    A locally heat-assisted torsion forming process for metal tubes is proposed and integrated in the conventional dieless drawing process. The part of the tube heated by a laser is subjected to torsion deformation due to the difference in the rotation speed of chucks. Pure aluminum tubes A1050 are used in the experiments, and excessive torsional deformation causes unstable deformation. The microstructure

    更新日期:2020-05-18
  • Task scheduling method for HRC workplaces based on capabilities and execution time assumptions for robots
    CIRP Ann. Pub Date : 2020-05-18
    Annika Raatz; Sebastian Blankemeyer; Tobias Recker; Dennis Pischke; Peter Nyhuis

    With human-robot collaborations, companies are struggling to decide how to schedule tasks in an effective way. We propose an approach to find an eligible division of tasks that forgoes expert knowledge and simulations. Based on a recreation of the application using predefined basic processes and knowledge of the process constraints, the human and robot capabilities are examined. In addition, a time

    更新日期:2020-05-18
  • The contribution of microstructure and friction in broaching Ferrite–Pearlite steels
    CIRP Ann. Pub Date : 2020-05-18
    C. Courbon; I.M. Arrieta; F. Cabanettes; J. Rech; P.-J. Arrazola

    Ferrite–Pearlite (FP) steels are used in many automotive components. However, their machinability in low cutting speed processes appears to be highly dependent on their metallurgical state. An experimental approach combining broaching and tribological tests under machining-like conditions was developed to determine the key FP features driving machining performance. Fundamental tests were performed

    更新日期:2020-05-18
Contents have been reproduced by permission of the publishers.
导出
全部期刊列表>>
材料学研究精选
胸腔和胸部成像专题
自然科研论文编辑服务
ACS ES&T Engineering
ACS ES&T Water
屿渡论文,编辑服务
杨超勇
周一歌
华东师范大学
南京工业大学
清华大学
中科大
唐勇
跟Nature、Science文章学绘图
隐藏1h前已浏览文章
中洪博元
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
x-mol收录
福州大学
南京大学
王杰
南科大
左智伟
湖南大学
清华大学
王小野
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug