Showing papers in "CIRP Annals in 1995"

TL;DR: In this article, a new method for the analytical prediction of stability lobes in milling is presented, which requires transfer functions of the structure at the cutter -workpiece contact zone, static cutting force coefficients, radial immersion and the number of teeth on the cutter.

TL;DR: The use of sensor systems for tool condition monitoring in machining and grinding is becoming more commonplace to enhance productivity as mentioned in this paper, and the motivation and basis for the utilization of these systems in industry, the sensors used in such systems including industrial application, new developments in signal and information processing, sensor based process optimization and control and directions for future developments.

TL;DR: In this paper, the main reasons for dimensional and geometric errors in workpieces produced on machine tools include low static stiffness of the machine structure, low dynamic performance of feed drives, tool wear and thermal deformations of the tool, machine and workpiece.

TL;DR: In this article, a vectorial equation for geometric error description is presented, which is independent from the machine structure and evaluation of measurement effectiveness is discussed and error compensation methods and strategies are examined.

TL;DR: In this article, the state-of-the-art in life cycle engineering/design is discussed, with special emphasis on design for low energy consumption in the use phase and design for disassembly.

TL;DR: In this article, a new cutting method named ultrasonic elliptical vibration cutting is proposed and applied to cutting of metals by utilizing a new vibrator to vibrate the cutting tool elliptically at ultrasonic frequency.

TL;DR: In this article, the influence of workpiece material, electrode material and type of dielectric on the composition and metallographic phases of the white layer is discussed, and it is shown that the use of an oil dielectrics increases the carbon content in the white surface of a workpiece.

TL;DR: In this article, mirror surface grinding operations were conducted by using ultrafine grain metallic bond wheels with electrolytic in-process dressing (ELID) for hard and brittle materials, such as monocrystalline silicon, glass, and ceramic.

TL;DR: In this article, a new technique of checking the machine quality of a Rapid Prototyping (RP) workpiece according to the ANSI-ISO standards is presented, and the surface of RP model were observed by SEM microscope.

TL;DR: In this paper, a synthetic consideration of electrode wear phenomena in electrical discharge machining is presented, where the authors deal with a synthetic approach to evaluate the wear rate of an electrode in the stationary state of machining, taking account of turbostratic carbon on the electrode.

TL;DR: In this paper, the critical temperature for the onset of temper colours for ferrous materials lies within the range 450 to 500 deg.C. and the effective contact length for vitrified CBN and alumina wheels was confirmed to be greater than the geometric value.

TL;DR: In this article, a generalized hypothesis for the brittle to ductile transition in micromachining and microindentation of brittle materials is proposed, which explains complicated transition phenomena observed in practical machining processes.

TL;DR: This paper describes a method of modelling and simulation for distributed simulation of virtual manufacturing systems and describes a system architecture which defines functional components required for modelling and Simulation, interfaces between components, virtual-real interactions, and system infrastructure.

TL;DR: In this article, the authors analyzed the limitations of current application systems and used fluid mechanics to develop flow conditioners to compensate for bends in pipes, and presented new nozzle designs that give long coherent jets, up to 45 m/s, maximizing the application of fluid into the grinding zone.

TL;DR: In this article, a geometrical model to describe the cutting process by using ball end milling with a tilt angle is presented, based on which the wear process and optimized cutting conditions for high speed milling of free formed surfaces can be determined.

TL;DR: In this paper, an interelectrode gap model for estimating machining parameters for the minimum gap size under the limit of electrolyte boiling was presented, and an on-line monitoring system based on this correlation was proposed for the PECM process.

TL;DR: In this article, a flat tool drawing apparatus consisting of a transparent die of quartz, a microscope with a CCD camera and a video system is developed to observe in situ the contact behavior at the interface directly.

TL;DR: In this paper, the authors analyzed the environmental impact of dissimilar waste streams through a scoring system which evaluates factors such as toxicity, carcenogenesis, irritation, flammability, and reactivity.

TL;DR: In this paper, a real-time tool breakage detection in NC milling process by monitoring cutting force is presented, where cutting force was indirectly measured by the feed drive AC motor current.

TL;DR: In this paper, a simulated model for ultra precision grinding is presented, and a simulation model for semi-conductor materials that are hard and brittle (Si) has been presented.

TL;DR: In this article, the workpiece area is heated directly before the grinding wheel is engaged, thus reducing the temperature gradient as well as surface layer damage, and the method permits high stock removal rates.

TL;DR: In this article, a new interpolator architecture for surface machining on five-axis CNC machines was developed and tested, which can handle quick and precise production of both convex and ruled surfaces by using flank-mills.

TL;DR: In this paper, a neural network model is used to compensate for errors due to changes in temperature and axis motion in five-axis machining, and a method based on the analysis of the neural network weights is used for selecting the most relevant thermocouple inputs.

TL;DR: In this paper, the authors investigated the possible sources of heat contributing toward the temperature rise in the shear band of cyclic chips, and extended Recht's original catastrophic shear instability model by predicting analytically the conditions for the onset of shear localization.

TL;DR: In this paper, a combination of scanning electron microscopy and damage inspection techniques on silicon nitride, alumina, and silicon carbide ground by diamond wheels with various grit sizes was used to evaluate the penetration depth of subsurface damage.

TL;DR: In this article, various measures including feed-forward, accelerometric feedback and tuned damper are discussed, and the improvements obtainable by various measures, including feedforward, acceleration feedback and tuning the damper.

TL;DR: In this paper, a tool-life relationship, including the effects of chip-groove parameters and tool coatings, has been developed and validated for a range of machining conditions on steel 1037M work material.

TL;DR: In this paper, the influence of abrasive processes on the integrity of machined surfaces is investigated by means of molecular dynamics simulations, and the surface integrity is described in terms of dislocation building, surface roughness, residual stresses, and crack initiation.

TL;DR: In this article, the authors explore possibilities to cut manufacturing leadtimes and to improve delivery performance in a small batch part manufacturing shop by integrating process planning and shop floor scheduling, using a set of initial process plans (one for each order in the shop), exploiting a resource decomposition procedure to determine schedules to determine schedule which minimize the maximum lateness, given these process plans.

TL;DR: In this article, an investigation of the energy partition to the workpiece for grinding of silicon nitride with diamond wheels was reported. The workpiece was obtained by measuring the temperature response in the subsurface using a two-color infrared detector and matching the results to analytically computed values.