Showing papers in "CIRP Annals in 2013"

TL;DR: Freeform optics is the next generation of modern optics, bringing advantages of excellent optical performance and system integration as mentioned in this paper, and finds wide applications in various fields, such as new energy, illumination, aerospace and biomedical engineering.

TL;DR: In this article, the state-of-the-art in predictive performance models for machining operations is presented, and a critical assessment of the relevant modelling techniques and their applicability and/or limitations for the prediction of the complex machining operation performed in industry.

TL;DR: In this article, the authors provide an overview of the state of the art in such joining processes, including cold welding, friction stir welding, self-pierce riveting, mechanical clinching and joining by forming.

TL;DR: In this article, the design, engineering principles and applications of machine tools specially developed for large parts are reviewed, where the impact of the general engineering principles differs substantially from those applied to conventional size machines.

TL;DR: In this article, the authors identify major current drivers for implementing product life cycle oriented environmental strategies but also barriers and obstacles that need to be addressed in order for environmental strategies to come into effect in industry practice.

TL;DR: An introduction to scalability, state-of-the art in manufacturing and computer science, and related applications including manufacturing and education and a roadmap for future research and developments are presented.

TL;DR: In this article, a tribometer is used to simulate a wide range of contact pressures and sliding velocities, similar to those occurring along the tool-work material interface in cutting.

TL;DR: Methods for CAD model generation from digital data acquisition, motion capture, assembly modeling, human–computer interface, and data exchange between a CAD system and a VR/AR system are described.

TL;DR: In this article, an innovative two-step free-form finishing method is presented, that combines fluid jet and precessed bonnet polishing on a common 7-axis CNC platform.

TL;DR: Open-architecture products (OAPs) as discussed by the authors are a new class of products comprising a fixed platform and modules that can be added and swapped, and customers can adapt OAPs to their needs by integrating modules into the platform.

TL;DR: In this paper, the authors determined dynamic mechanical behaviors of Nitinol in cutting and found that the very high strength and specific heat are responsible for large flank wear and fast tribo-chemical crater wear, respectively.

TL;DR: In this paper, the fundamental concept of skin model has been developed as an alternative to the nominal model and covers geometric deviations that are expected, predicted or already observed in real manufacturing processes.

TL;DR: The study presented, comprises an assembly sequence generation algorithm, for the creation of assembly sequences and steps, carried out by engineers with the use of CAD data and any additional input concerning the product.

TL;DR: In this article, a novel surface damping solution composed of a thin flexible layer mounted with distributed discrete masses attached with viscoelastic layer is presented, which enables damping over a wide bandwidth.

TL;DR: In this article, a two-pass polishing process was proposed, in which the first pass takes advantage of thermocapillary flows in significantly reducing the surface roughness, and the second pass removes the residual process features.

TL;DR: In this paper, an innovative method for the electrical discharge drilling of ultra-high aspect ratio (AR>30) micro holes is presented. But this method makes use of tools insulated on the sidewall by means of a coating.

TL;DR: In this paper, an extended multi-frequency-solution is introduced to present the effects of imperfect FRFs of diagonal, symmetric, non-symmetric or filtered types on the computed stability charts that provide instant information to avoid harmful vibrations.

TL;DR: In this paper, a biaxial active actuator has been developed to suppress chatter vibrations in heavy duty milling processes, where damping is added to the structure using vibration absorbers.

TL;DR: In this paper, the shape and structure of the tool tubes are optimized numerically and experimentally for distributing the electrolyte flow more uniformly, and a special experimental system with synchronous motion of three tool tubes has been developed.

TL;DR: In this paper, a cognitive robotics based system is proposed to address the uncertainty associated with the quality and quantity of the returned EOL products, which is a critical step to increase the value of end-of-life (EOL) products and to reduce the environmental footprint.

TL;DR: In this paper, a multi-objective decision-making and simulation approach is proposed to support the design and operation of manufacturing networks based on a multiobjective Decision-Making and Simulation approach.

TL;DR: The paper shows how a shared ontology-based framework can be used to generate consistent 3D virtual environments and discrete event simulation models, demonstrating this way how the proposed solution can provide an interoperable backbone for heterogeneous software tools.

TL;DR: An edge detection method for the surface extraction based on a 3D Canny algorithm with sub-voxel resolution with advantages in comparison with the most commonly used technique nowadays, i.e. the local threshold definition is presented.

TL;DR: In this paper, Kolsky bar experiments with controlled, electrical DC current applied were conducted and the results for current densities up to 180 A/mm2 showed that at these high deformation rates, an electroplastic effect is not observed.

TL;DR: In this paper, a new characterization approach based on optical strain measurement is presented to comprehensively identify the failure stages, critical strains and bending angles in a user-independent manner, which gives a prerequisite for improved and material specific industrial process design in future.

TL;DR: In this article, a new and comprehensive strategy for planning minimum cycle time tool trajectories subject to both machining process related constraints, and also limitations of the feed drive control system is presented.

TL;DR: In this article, the influence of the feed increasing on the material quality was analyzed in order to investigate if the development of high speed machines could be a suitable solution to implement more extensively the single point incremental forming technique in practice.

TL;DR: In this paper, a real-time on-site facility layout planning (FLP) system is presented where users can construct existing facilities as virtual primitive models, and a criterion and constraint definition mechanism is provided to define and customize the planning criteria and constraints to suit specific requirements of different FLP tasks.

TL;DR: In this paper, the authors define a new method for the experimental determination of the Forming Limit Curves (FLCs), which is based on the hydraulic bulging of two specimens, and the most important advantages of the method are the capability of investigating the whole strain range specific to the sheet metal forming processes, simplicity of the equipment, and reduction of the parasitic effects induced by the friction.

TL;DR: In this paper, the effect of the process parameters (speed, feed, frequency, and amplitude) in the low frequency-high amplitude regime (LHAM) was investigated.