Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Machining performance"”.
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Workpiece -Fixture Frictional Contact and Its Influence on Machining Performance
… dynamic model, it is possible to predict machining process stability by taking the workpiece-fixture interaction into account. Results from machining process stability showed that the machining stability is strongly influenced by the frictional contact and the incorporation of its …
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On the Modeling and Analysis of Machining Performance in Microendmilling
The surface generation process in the micro-endmilling of both single phase and multi-phase workpiece materials was also examined. 508 micron diameter endmills with edge radii of 2 and 5 microns were used to machine slots in ferrite, pearlite and two ductile iron materials at feedrates ranging from …
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Investigating the influence of film formation on the machining performance in an atomization-based cutting fluid spray system
… temperatures and production of thin chips during machining. Heat generated in the tool-chip contact region is not readily dissipated, leading to a shortened tool life. Various cooling methods have been studied for titanium machining including high pressure coolant application, minimum quantity …
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The impact of multilayer periodicity on texture, morphology, chemical stability and machining performance of titanium aluminum nitride/chromium nitride thin films
… in ISO standard wear vs. cutting time format. Machining results were connected back to the previously identified changes in structure.</p><p>All films exhibited a rocksalt B1-type structure with a columnar morphology and lateral coarsening during film growth; which was more pronounced in the …
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Investigation of cutting temperature and cutting force from mist flow pattern in MQL technique
… the formation of mist. MQL has proven to reduce machining cost and increase machining performance. Previous research have stated that machining performance is affected by the lubricant type, flow rate, the distance between nozzle and tool tip, and the workpiece material. These important …
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Dynamic Modeling and Dynamic Analysis of the Boring Machining System
… it susceptible to self-excited chatter during machining. The main focus of this thesis is directed at developing a system model which correctly describes the boring operation, applying modern control theory to perform dynamic cutting analysis, and exploring a systematic approach to evaluate the …
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Investigating the effects of AC voltage signals on micro-channels machined with the Spark Assisted Chemical Engraving process
… The process relies on multiple parameters for machining, but its stochastic nature often reduces the predictability of machining outcomes. While prior work has studied various individual parameters, the influence of voltage waveforms has been largely neglected. This study filled that gap by …
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A hybrid type small 5-axis CNC milling machine
… ranging from aerospace to consumer-die-mold machining because they can deliver high machining accuracy with a spindle tilting capacity. Most of these machines have serial mechanisms so that low static and dynamic stiffness become very critical design issues especially for high speed …
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Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process
… concentrations (i.e. 0.01 to 0.05 wt.%). The performance of MJOs was analysed based on the physicochemical properties, tribological behavior and orthogonal cutting. According to the current findings, thermal-oxidation stability of MJOg3 (MJO+0.05wt.% graphene nanoparticles), MJOh3 …
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A Study on the Micro Electro-Discharge Machining of Aerospace Materials
<p>Electrical Discharge Machining (EDM) is a non-traditional machining process that uses hundreds of thousands of minute electrical sparks per second to machine any electrically conductive material, no matter the hardness or how delicate it is. EDM allows a much greater range of design …
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Experimental study of biomedical stainless steel 316l vibration assisted milling using retrofittable 1D UVAM worktable
… been increasing. Thus, it is important to ensure machining for these parts are done in a high precision manner. Ultrasonic vibration assisted milling (UVAM) is a well-known precision machining equipment. It improves the machining performance and could perform machining on extremely delicate …
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A Comparative Study on Micro Electro-Discharge Machining of Titanium Alloy (TI-6AL-4V) and Shape Memory Alloy (NI-TI)
… surface modifications that take place during the machining of NiTi SMA and Ti-6Al-4V with micro-EDM. This was done by creating an array of blind holes and micro-patterns on both work-pieces. To analyze the machined surface and investigate the results, scanning electron microscope (SEM), energy …
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An integrated framework for developing generic modular reconfigurable platforms for micro manufacturing and its implementation
… cutting parameters can be studied and the machining performance can be subsequently evaluated using this module. The mathematical models for a non-traditional micro manufacturing process, micro EDM, have been developed with the simulation performed using FEA. Various design theories and …
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Development of a Closed Loop Control System for Vibratory Milling
… makes ever-increasing demands for higher machining speeds. This is particularly true in car and aircraft production, but also for cutting tools. Vibration is used in various technological processes to improve the performance of the machines by intelligently exploiting the synergy of the …
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Evaluation of the atomization-based cutting fluid spray system in milling of titanium alloy
… cooling and lubrication effects are vital during machining of these alloys. Recently, it has been shown that an atomization-based cutting fluid (ACF) spray system can effectively cool and lubricate the cutting zone during turning of Ti-6Al-4V, leading to significant improvement in machinability of …
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Design and analysis of the internally cooled smart cutting tools with the applications to adaptive machining
Adaptive machining with internally cooled smart cutting tools is a smart solution for industrial applications, which have stringent manufacturing requirements such as contamination free machining (CFM), high material removal rate, low tool wear and better surface integrity. The absence of cutting …
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Atomized dielectric spray-based electric discharge machining (spray-EDM) for sustainable manufacturing
Electrical Discharge Machining is a non-traditional machining process that is widely used in the tool and die-making industry, automotive, and aerospace industries due to its ability to produce complex three-dimensional geometries with good accuracy and surface finish. Despite the aforementioned …