Showing papers in "CIRP Annals in 1983"

TL;DR: In this paper, a survey of commercially available sensors for unmanned machining is presented, including dimensional and proximity sensors, cutting force, spindle force and feed force sensors, and spindle motor (torque and power) sensors.

TL;DR: In this article, the historical progress of machining accuracy is plotted and its probable further development is shown by extrapolation, both in the micro-technology and nano-technology regions, and the problems to be addressed and solved in achieving true accuracies of 0.1 μm - 0.05 μm for electronic, optical and mechanical workpieces; measuring resolution and random errors in the required ultra-precision processing machines will have to be no worse than 0.01 μm (10 nm).

TL;DR: In this article, an experimental investigation to improve the machining efficiency of titanium alloys has been conducted, where a natural diamond tool characterized by the highest thermal conductivity of all the tool materials available was utilized by applying abundant water-soluble coolant.

TL;DR: In this paper, a time domain simulation approach to the analysis of chatter is applied to improve the knowledge of the effect of cutting speed "lobing" and of special cutters (nonuniform pitch) on stability of milling.

TL;DR: In this article, a test method, the Circular Test, is introduced and the influences of the single machine errors, i.e., control system resp. probe system and geometry of the machine (positioning, straightness, roll, pitch, yaw and non-perpendicularity), are shown in detail.

TL;DR: In this paper, a pulse discriminator (EDM-PD) is used for EDM process analysis and on-line control, which is based on continuous gap voltage tracking.

TL;DR: The paper outlines some recent work in systems synthesis, production control, process planning, monitoring and diagnostics, utilizing AI techniques, and new suggestions - based on situation-recognition, problem-solving and game-theoretic considerations are put forward regarding the semi-automatic perfection of knowledge-bases and meta-Bases in the absence of explicit, deterministic knowledge.

TL;DR: In this paper, an experimental study was conducted to improve the machining characteristics of water, which is used as dielectric for EDM, by adding organic compounds into water to solve the problem of inflammability, but it has net so high productivity as EDM oil.

TL;DR: In this article, an automatic determination of assembly/disassembly sequence of machine units from the assembly drawings is presented. But the work is based on the assumption that the sequence of assembly is the reverse of that of disassembly, and connective relations between parts such as fit, taper contact and clamping contact are classified according to the degree of freedom of motion.

TL;DR: In this article, three versions of KPS were designed and constructed at DTS: two types of Magnetic Ball Bars (MBB) and a special KPS with an air bearing.

TL;DR: In this paper, the authors describe the introduction of an pumping action of the dielectric fluid by means of a special electrode movement, which can decrease the average metal removal rate.

TL;DR: In this paper, the effect of the phase-angle between the voltage and vibration waveforms on metal machining rates is analyzed, and the influence of the electrical discharges in the electrolyte is shown to become the major factor promoting enhanced rates of metal removal, as both phaseangle and amplitude of vibration increase.

TL;DR: A method is described which enables two dimensional surfaces to be built up in a computer in such a way that surfaces can be generated which have prescribed functional characteristics.

TL;DR: In this article, a system for predicting the cutting torque by using a geometric modelling system, and its application to verification of NC data and monitoring of the cutting process is described, based on data obtained from the geometrical simulation and on technological data of the NC program.

TL;DR: In this article, the influence of silicon content, porosity and multiple cut interruption on the tool life was studied and recommendations were made for maintenance of tool life and avoidance of built-up edges or adhesive welded particles.

TL;DR: In this paper, the theory of a new algorithm is described which reconstructs the physical chain of effect in a deterministic manner, based on the wheel topography, taking into account important factors such as temperature dependent work material properties and elastic deflection of the grinding wheel.

TL;DR: In this paper, the critical cutting force at which the material removal occurs due to unstable crack propagation is determined for hot-pressed Al2O3 in terms of the fracture toughness, the tool geometry and the tool/work interface frictional property.

TL;DR: In this article, a semi-mechanistic model for predicting cutting force components of a single tooth cutter is derived from metal cutting theories and geometric relations of face-milling process.

TL;DR: In this article, an Interactive Computer Aided Process Planning (ICAPP) for non-rotational prismatic parts produced on machining centers and conventional milling, drilling and boring machines is presented.

TL;DR: Grinding is the preferred process throughout industry where high production and the highest level of quality and precision are required as mentioned in this paper, however it is one of the least understood of metalworking processes.

TL;DR: In this paper, the results of investigations into metal-flow with application of Visioplasticity and Finite Element Methods are preserved, and it can be shown that the ratio of tool length to workpiece height or thickness, the geometry of workpiece and tools and she forging sequence are the dominating process parameters.

TL;DR: In this article, an analysis of vibration is presented which includes the effects of wheel flexibility (both contact stiffness and flexible hub), regeneration on the wheel and/or the workpiece, and it is confirmed that wheels with a flexible hub give a greatly improved performance and may even eliminate instability.

TL;DR: In this paper, a general principle of equivalent, obliquity is derived which is applicable to rotary tools of any oblivity, and the general trends of the geometric features and the cutting force components observed in oblique rotary cutting can be derived using the principle.

TL;DR: In this paper, a preliminary analysis of the different mechanical and physical aspects of the flowdrilling process is presented, including cycle time and tool life, as well as manufacturing properties.

TL;DR: In this paper, the authors show that the formulas for the temperature computation developed by Jaeger and Des Ruisseaux, supplemented with the heat loss due to chip removal, perfectly match the both case of creep feed grinding and pendulum grinding.

TL;DR: In this article, an interactive mold cavity CAD/CAM system has been developed and applied for the modeling and machining of mold cavities and dies, where a machine operator can easily control and/or change the cutting conditions (cutter path, three-dimensional cutter offset operation, pick-feed and cutting direction) during machining opration.

TL;DR: Spray forming comprises a new generation of metal manufacturing processes for making semi-finished engineering materials as discussed by the authors, which cover such diverse products as strip and sheet having fine grain size and Rapid Solidification potential, large diameter rings and tubes, forgings, billets for extrusion and forging and spray coated steel strip with adherent and ductile coatings.

TL;DR: In this paper, three wheel grades (I, K, M) were used to plunge-grinding 4340 (Rc43) and traverse-grind 52100(Rc60) steels.

TL;DR: In this article, a simple method of calculating an upper bound on machining forces is proposed, assuming that shear stress on the shear plane and on the rake face of the tool are equal over the entire contact area.