Showing papers in "CIRP Annals in 1993"

TL;DR: In the 1990 CIRP General Assembly in Berlin, a working group on chip control was formed within the STC -Cutting, with a view to evaluating and sharing the present knowledge on chip formation and chip control and promoting new research in this area as discussed by the authors.

TL;DR: In this article, the effects of hard machining on surface integrity aspects and attainable accuracies are not well understood and compared to those which are ground, and the development in the area of high precision machining of hardened steels is presented.

TL;DR: An overview of the major development thrust in CAPP is presented along with some of the evolving trends and challenges such as rapid, generic, dynamic and/or distributed process planning as discussed by the authors.

TL;DR: In this article, the authors present an overview of disassembly research at universities, research centers and industrial companies, pointing out ongoing topics and trends for future activities, including technological development, product design, process design, and system design.

TL;DR: In this paper, a two-layer model for laser bending is proposed, which is capable of describing the process in spite of many restrictions which have to be made, such as the coefficient of thermal expansion.

TL;DR: In this paper, the authors use peak-to-peak (PTP) diagrams for the evaluation of the results of multiple runs of a time-domain simulation of a ding process, which summarize the amplitudes of the forces, deflections, or surface finishes resulting from a large number of simulations through a range of axial depths of cut and spindle speed.

TL;DR: In this paper, the feasibility of micro-cutting of free machining work materials under perfect motion of a machine tool is analyzed using molecular dynamics computer simulation. But the results suggest that the quality of work-surface of aluminum is worse than that of copper.

TL;DR: In this article, high speed machining for Inconel 718 was carried out with SiC whisker reinforced alumina, silicon nitride and TiC added alumina ceramic tools.

TL;DR: In this paper, the real of contact during the chip formation is not well known and therefore a clear determination of the type of wear is only possible after a well-founded investigation on the wear appearances.

TL;DR: Virtual manufacturing is a concept of executing manufacturing processes in computers as well as in the real world and the relations with other concepts in manufacturing are discussed.

TL;DR: In this article, different approaches are described for applying artificial neural network techniques for modelling and monitoring of machining processes (turning, milling) by sensor integration, and special emphasis is placed on the incorporation of varying cutting conditions into the learning phase and solutions, which are based upon normal operation, i.e. cutting with sharp tools.

TL;DR: In this paper, a new method of surface modification by electrical discharge machining using composite structured electrode surface modifications on work pieces of carbon steel or aluminum were carried out in hydrocarbon oil using composite electrodes Composite electrode consists of green compact products or sintered products Copper, aluminum, tungsten carbide and titanium were used for the material of the electrode, it was revealed that there existed the electrode material in the work surface layer and the characteristics of the surface of raw material remarkably changed

TL;DR: In this paper, the authors describe an heuristic approach for design and balancing of a robotic assembly line, which uses heuristics to limit and guide a Branch and Bound frontier starch, thus leading to solution of very large or difficult problems.

TL;DR: A review of the latest advances and practical applications in the field of die and mold manufacturing can be found in this article, with input from various CIRP colleagues, who attempt to review the most recent advances and applications in this field.

TL;DR: In this paper, a mathematical model for the PECM process is presented, which takes the non-steady physical phenomena in the gap into consideration, including pulse current, metal removal rate, effective volumetric electrochemical equivalent and electrolyte conductivity variations.

TL;DR: In this paper, a case of High Speed Grinding of gears is also introduced, where the problem of loss of process damping is dealt with as well as the use of spindle speed regulation for improving stability.

TL;DR: In this paper, a new relationship for the contact between the grinding wheel and the surface of the workpiece is introduced based on contact mechanics, including the effect of the surface roughness of the contact faces.

TL;DR: In this article, the most recent developments in abrasive machining are reviewed pointing out problems to be solved for their practical applications in the near future, and they concluded that promising abrasive technologies of the future should include: grinding wheels with ultrafine grits, molecular dynamics surface integrity assessment techniques, high-speed abrasives machining with CBN, autonomous machining system implementing intelligent control and advanced monitoring systems, and coolant-free grinding.

TL;DR: The metrology relevant capabilities of both systems are described and compared and it is shown that the performance of these systems are partially very similar, partially very different.

TL;DR: In this paper, a method is proposed by applying the rigid-plastic FEM to analyze the mechanics of steady state orthogonal micromachining process of copper taking into consideration of the roundness of the tool edge.

TL;DR: In this paper, a new method of roundness and spindle error motion measurement is presented by using four probes mounted with a certain angle arrangement, which gives high accuracy for all harmonics which is difficult for three point method.

TL;DR: In this article, the typical 11 kinds of optical glasses have been ground by the ultra-precision surface grinder having a glass-ceramic spindle of extremely low thermal expansion with various cup-typed resinoid-bonded diamond wheels of #200-#3000 in grain size.

TL;DR: In this article, the authors evaluated energy dissipation and stress/strain distribution in nanoscale cutting and applied it to the results of atomic model-based simulation of cutting.

TL;DR: In this paper, a computerized simulation for cylindrical plunge grinding operations is described, which predicts both the grinding behavior during the cycle and the final part quality, including grinding forces, power, actual material removal, temperature, thermal damage, thermal expansion, wheel wear, surface roughness and roundness.

TL;DR: In this article, the nature of these twisted ruled surfaces is analyzed and conditions for their collision free milling by a cylindrical cutter are established, and efficient milling strategies are found.

TL;DR: In this paper, the effections of percentage and direction of the Sic whisker and the cutting parameters on cutting surface integrity of the SiCw/Al composites were studied with SEM and TEM analysis.

TL;DR: In this paper, the impact of chip thickness and its influence on the grinding process of CBN-grinding wheels has been investigated in terms of cutting speed, depth of cut and work speed.

TL;DR: In this article, the authors demonstrate that substantial errors may be incurred and describe simple tests to evaluate the scale of those errors, and then discuss the error sources and presents a method for compensating for those errors.

TL;DR: In this paper, a model tailored after a typical wire-EDM discharge has been developed and experimentally verified, which describes the impact of a discharge on the anode as a heat source on a semi-infinite solid whose size and intensity are time-dependent.

TL;DR: In this paper, an automatic chip breaking detection in turning has been developed for use in the laboratory using a detection technique based on frequency analysis of the dynamic feed force component, which is demonstrated using different lathes, cutting tools, workpiece materials and data.