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 20 of 51 for “"cutting process"”.
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ANALYSIS AND OPTIMIZATION OF LASER CUTTING PROCESS FOR STRUCTURAL STEELS
Laser cutting is a widely used technology for precision cutting of various materials, in-cluding mild structural steel. It involves the use of a high-powered laser beam to melt, burn, or vaporize the material, resulting in a clean and accurate cut. This doctoral thesis presents a comprehensive …
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Acoustic analysis of rock cutting process for impregnated diamond drilling
The rock cutting industry has experienced important changes with the introduction of diamond-based drilling tools in the last few decades. Impregnated diamond (ID) bits are part of that introduction and their main use is to drill hard and abrasive rock formations. ID core drilling has emerged as …
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Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process
… at molar ratio 3.5:1 through transesterification process. Subsequently, the MJOs were mixed with hexagonal boron nitride (hBN), graphene and copper oxide (CuO) nanoparticles at various concentrations (i.e. 0.01 to 0.05 wt.%). The performance of MJOs was analysed based on the physicochemical …
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Development of a high-speed high-precision micro-groove cutting process
… high-precision chip formation-based micro-groove cutting process has been developed for cutting grooves in metals with nearly arbitrarily shaped cross-sections, which have widths and depths of a few hundred nanometers to a few microns, and lengths of tens of millimeters. A flexible tool, …
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Productivity enhancement through a proposed methodology in the cutting process of SMES
La industria textil es un sector importante en la economía global, y en Perú desempeña un papel significativo en la creación de empleo. Sin embargo, a menudo enfrenta desafíos como la falta de innovación, una alta competencia de productos importados y baja productividad. Para abordar eficazmente …
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A general cutting process model for high-speed machining: Dynamic and thermal considerations
… objective of this work is to develop a general cutting process model for high-speed machining (HSM) that can predict the optimum cutting conditions which result in high productivity rates, small workpiece surface error, and reasonable machine-tool life.
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Modeling of Steel Laser Cutting Process Using Finite Element, Machine Learning, and Kinetic Monte Carlo Methods
Laser cutting is a manufacturing technology that uses a focused laser beam to melt, burn and vaporize materials, resulting in a high-quality cut edge. Although previous efforts are primarily based on a trial-and-error approach, there is insufficient understanding of the laser cutting process, thus …
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Optimization of parameters of laser non-linear inclined cutting on stainless steel metal
The aim of this research is to develop a laser cutting process model that can predict the relationship between the process input parameters and resultant surface roughness; kerf width characteristics. The research conduct is based on the Design of Experiment (DOE) analysis. Response Surface …
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Digital Tracking Control for Machine Tool Feed Drives
… interaction between the servo control and cutting process. A simplified end milling cutting process model is used in a structured singular value based uncertainty analysis to predict the cutting conditions for which the machining process will remain stable. Experimental results from …
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Effects of bit geometry in multiple bit-rock interaction
… impact of bit-coal/rock interaction during the cutting process in underground mines is great concern to the mining community of the world. Rock/coal cutting bears directly on rock/coal dust generation that causes "black lung/silicosis" in miners. On the other hand, rock cutting generates …
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Finite element modeling of cutting and burnishing processes at micro- and nanoscales
Micro/nano cutting and micro/nano burnishing processes are widely used in the field of manufacturing. Compared to their counterparts in the conventional scale, micro/nano cutting and burnishing processes have unique characteristics. First, there are various size effects, such as the edge radius, …
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The use of variable spindle speed for vibration control in face milling process
… is one of the most important issues in the metal cutting process. It has been recognized for several decades that many machining process performance measures are influenced by vibrations: e.g., surface finish, tool wear, and cutting force characteristics. Vibrations result in a poor surface finish …
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Dynamic Modeling and Dynamic Analysis of the Boring Machining System
The boring operation is a metal cutting process widely used in industry. The inherent properties of the long, slender boring bar make 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 …
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Determination of Wall Thickness and Height when Cutting Various Materials with Wire Electric Discharge Machining Processes
<p>This thesis looks at the capabilities of cutting thin webs on Wire EDM machines that are difficult or impossible to machine using conventional methods. Covered is an investigation of how different material and web thickness affect the capability of machining thin-walled parts.</p> <p>Five …
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Examination of Lubrication Effects on Fracture Measurements of Hydrogels via Cutting
Despite cutting being a common process in the fracture of soft materials, there is no well-defined method that can be considered equivalent to some of the more traditional methods of fracture based in tension. A recently developed method by the name of razorblade-initiated fracture testing (RIFT) …
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Study of contaminants in plasmas during decommissioning processes
… are subjected to plasma-based decommissioning processes are developed. Two parallel plasma systems are developed and investigated. A better-understood argon plasma based system has temperature measurement methods developed, along with an exploration of the resultant behavior when …
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Wireless Sensor Integrated Tool for Characterization of Machining Dynamics in Milling
… sensors. Historically, the ability to record in-process data at an end mill tool tip has been limited by the sensor location. Often, these sensors are mounted on the material workpiece or the machine spindle at significant physical distance from the cutting process. Of specific interest are the …
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Relationship between cutting parameters and bit geometry in rotary cutting
… was to investigate the relationship between cutting parameters (cutting force, penetration force, specific energy, specific respirable dust) and the bit geometry parameters (angle of the bit tip, bit tip size and shape of the bit) in order to reduce the amount of specific respirable dust …
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Dedução do incremento das forças de corte dinâmico ortogonal e sua aplicação para previsão da carta de estabilidade, num modelo simplificado de máquina operatriz
… deduction of increment in the thrust and main cutting forces during dynamic orthogonal cutting process for continuous chip, taking iinto account that these forces are functions of two variables, namely the chip thickness and the shear angle. The dynsmic variation of the shear angle is …
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Modeling of the cylinder boring process for prediction of cutting force, temperature and surface error
… for characterization of the cylinder boring process, a process used for machining cylinder bores in cast engine blocks. The models are used for predicting the lack of cylindricity of machined cylinder bores, also called surface error, which results in poor engine performance and excessive …
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