Showing papers in "CIRP Annals in 2014"

TL;DR: Hybrid manufacturing processes are based on the simultaneous and controlled interaction of process mechanisms and/or energy sources/tools having a significant effect on the process performance as discussed by the authors, which can have a large influence on the processing/manufacturing characteristics resulting in higher machinability, reductions of process forces and tool wear.

TL;DR: A review of cutting edge preparation technologies and methods for cutting edge characterization can be found in this article, where the authors discuss the influence of cutting-edge geometry on chip formation, material flow, as well as mechanical and thermal loads on the tool.

TL;DR: In this paper, the authors present an overview of recent developments in simulating machining and grinding processes along the NC tool path in virtual environments, and present the present and future challenges to achieving a more accurate and efficient virtual machining process simulation and optimization system.

TL;DR: A time-indexed integer programming formulation is developed and used to identify manufacturing schedules that minimize electricity cost and the carbon footprint under time-of-use tariffs without compromising production throughput, and results suggest that shifting electricity usage from on-peak hours to mid- Peak hours or off- peak hours, while reducing electricity cost may increase CO2 emissions in regions where the grid base load is met with electricity from coal-fired power plants.

TL;DR: In this paper, a customized FE model for describing the microstructural changes during dry and cryogenic cutting of Ti6Al4V is presented, which addresses the importance to modify the material behavior taking into account the microstructure changes and the cooling/lubrication effects during the cutting process.

TL;DR: In this paper, the authors present the recent developments of HEFJet-Mach from various perspectives: machine/system designs; modelling of both jet plumes and their interactions with the target surfaces; part quality including material integrity; supervision and control of the process; key aspects of machine maintenance and health and safety.

TL;DR: A task oriented programming procedure is described for the intuitive programming of dual arm robots, including the proposed dual arm robotics library and the human language, developed in ROS.

TL;DR: In this article, side milling tests of CFRP (Carbon Fiber Reinforced Plastics) without coolant are carried out by DLC (Diamond-Like Carbon)-coated carbide end mills.

TL;DR: In this article, the limits of micro-injection molding in replicating high aspect ratio micro-structured surfaces are experimentally investigated, using the molding of a bio-MEMS for erythrocytes depletion as a case study.

TL;DR: The concepts of Skin Model Shapes, which provide a finite describability and the digital representation of the Skin Model concept, and their unified discrete geometry representation are investigated and new contributions to tolerance representation and analysis are presented.

TL;DR: In this article, the authors present a holistic sustainability assessment tool for manufacturing SMEs, which is applicable on a factory level with reasonable effort, provides decision support for improvements and enables a cross-industry comparison.

TL;DR: This article analyzes a series of different cost-optimized scenarios for several points of time in the future with distinct parameter settings and compares its network structures to identify a path in the trade-off between the costs for migrating a network structure into another one and the total landed costs of the regarded series of future network scenarios.

TL;DR: In this article, the surface integrity of nickel-based superalloys after machining operations has become a topic of major interest in the aerospace sector, and the results indicated the presence of nano-sized grains typical of severe plastic deformation in the machined surface.

TL;DR: In this paper, the heat source diameter of single pulse discharge in electrical discharge machining was investigated and the diameter of the discharge crater was obtained by solving the inverse problem of heat conduction analysis, and it was found that the heat sources diameter is smaller than the plasma diameter but larger than the crater diameter.

TL;DR: In this paper, an in-process sensing technique for online product quality assessment, using injection molding as an example, is presented, which measures four parameters within the injection mold cavity, which are directly correlated with the part quality: melt pressure, temperature, velocity, and viscosity.

TL;DR: In this paper, a polycrystalline diamond (PCD) drill was used in tests since this type of drill is commonly used in practice, and validation tests on multi-directional CFRP laminates were performed and good results were obtained.

TL;DR: In this article, a noncontact magnetic actuator with fiber optic displacement sensors is presented, which can be delivered in two radial directions for active damping of lateral modes of the boring bar.

TL;DR: In this article, an integrated simulation in terms of a co-simulation allows coupling of simulation environments at runtime in order to link different model descriptions (e.g. differential equations, data-based models) and computational algorithms (i.e. explicit/implicit ODE solvers with independent step sizes).

TL;DR: In this article, an innovative shape adaptive grinding (SAG) tool is introduced that allows finishing of CVD silicon carbide with roughness below 0.4nm Ra and high removal rates up to 100mm 3 /min.

TL;DR: In this paper, laser beam machining with ultra-violet (UV) nanosecond pulse laser was utilized for fabrication of the surface textured metal mold, and the replica of thermoplastic polymer was fabricated using compression molding for mass production.

TL;DR: In this paper, the authors present the vibration suppression of a boring bar using piezoelectric actuators installed in the boring bar, and an inductor-resister (LR) circuit, which acts as a mechanical dynamic absorber.

TL;DR: In this paper, the effect of minimum quantity lubrication (MQL) parameters (oil flow rate OFR, air flow rate AFR, nozzle orientation and distance from the cutting zone) on flow characteristics was examined in CFRP milling.

TL;DR: In this paper, the effect of melt pool diameter (laser spot diameter) on surface topography during pulsed laser micro polishing is discussed, and the manipulation of the pool diameter during three-pass laser polishing can reduce surface roughness.

TL;DR: Cupronickel was used as the electrode material to fabricate microstructures on polycrystalline diamond by electrical discharge machining (EDM) The electrodes were shaped into tiny rotary wheels driven by the flow of EDM fluid Results showed that material removal rate was improved by a factor of five compared to conventional electrode materials as mentioned in this paper.

TL;DR: In this paper, the effect of brittleness and fatigue of mono-and multi-layer PVD films on coated tools cutting performance is introduced, and nano-indentations are conducted to evaluate the hardness of diverse coating structures.

TL;DR: In this paper, an in-process tribometer is examined to measure friction during orthogonal turning process at cutting speeds up to 300m/min at fresh and oxidized surfaces and decreasing friction coefficient with increasing cutting speed.

TL;DR: In this article, a comparative LCA study is presented for flax fibre reinforced composites based on PP on the one hand, and functionally equivalent glass fibre reinforced PP composites on the other.

TL;DR: In this article, the formability of hot stamping of an ultra-high strength steel part was improved by preventing a temperature drop of the flange increasing resistance to drawing, which was reduced by high speed forming using a servo press and by less contact with a die and blankholder using spacers thicker than the sheet.

TL;DR: In this paper, a compensation approach was proposed to reduce up to 85% of the thermally induced location errors of rotary/swivelling axis units based on internal NC signals, like power supplied to drives.

TL;DR: In this article, a flier workpiece impacts a stationary workpiece to create a solid state weld, and a wavy pattern is observed at the interface between the two workpieces.