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 35 for “"NUMERICAL CONTROL"”.
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Multi-variable optimal numerical control using adaptive model for identification of thermally induced deformation in high-speed machine tools
… The demand of the manufacturing sector to control the residual thermal errors below ±10 om in the whole working range of the machine tool has not yet been achieved. Since it is impossible to design machine tools that are thermally stable within this range, a feedback control system emerges …
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Modification of a vertical machining centre to include turning operations : an investigation
There has been an accelerated use of Computer Numerical Control machine tools by developed countries over the past decade resulting in manufacturing companies becoming more competitive on the world market. However, the initial cost of these machines is prohibitive to many companies in the third …
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21st century manufacturing machines: Design, fabrication and controls
… will influence the design, manufacture, and control of manufacturing machines in the future. For instance, miniaturization will change manufacturing processes; additive and rapid prototyping will change the production of machine components; and open electronics offer a platform for new …
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Vision-based localization for robot-CNC hybrid manufacturing
… process can be realized by retrofitting Computer Numerical Control (CNC) machines with deposition heads, adding spindles and deposition heads to robots, or developing part localization methods to transfer parts from an additive cell to a CNC machine. Here, a novel, robot-CNC hybrid configuration …
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Implementation of Machine Connectivity in Low-Volume High Variety Manufacturing Line
… The software’s scope involved DNC (direct numerical control), allowing for line-by-line feeding of CNC code to machine controllers, as well as machine data collection for real-time shop floor monitoring. The research emphasizes the development and implementation of an advanced network …
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Time-optimal CNC tool paths : a mathematical model of machining
… time that it takes for a 5-axis CNC (Computer Numerical Control) milling machine to sweep an entire free-form surface in its finishing stage. We formulate a non-classical variational time-optimization problem defined on a 2-dimensional manifold subject to both equality and inequality …
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Evaluation, design, and construction of the Wallace Astrophysical Observatory Camera for astronomical observations
… WAOcam involved using the following: Computer Numerical Control (CNC) lathe, CNC mill, drill press, and a Waterjet (cutting machine). The manufacturing process also required learning of Omax (software for the Waterjet) and MasterCam 9.1 (software for the CNC lathe and CNC mill). The resulting …
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Improving inventory management to increase profitability
… a leading designer and manufacturer of computer numerical control (CNC) routers and plasma tables, is experiencing robust growth, with revenues growing an average of 40% each year since 2015. Due to this growth, ShopSabre maintains an average backlog of 130-140 machines and an average lead time …
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Design and development of a small-scale 12S-14P outer rotor HEFSM
… structure is fabricated using a computer numerical control (CNC) machine. The prototype has been tested experimentally using a measurement tool such as Fluke Analyser and oscilloscope. The back EMF showed a good agreement between simulation and preliminary experimental results with …
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Real time water pipes leak detection using electromagnetic waves for the water industry
… the PCB board was fabricated by using a computer numerical control (CNC) routing machine. Finally the graphical interface package LabVIEW was used to control the frequency sweep for the sensor and to capture the data from the sensor. Based on the findings of this project, the EM wave sensor could …
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New technique for the development of open CNC cell controller based on ISO 14649 and ISO 6983
The aim of modern Computer Numerical Control (CNC) is to be more flexible, interoperable, adoptable, open and intelligent. In the projection towards the development of the next generation of CNC systems, the problem of current International Standards Organization (ISO) data interface model (ISO …
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Process Capability in a Computer Integrated Manufacturing Cell
… probe used in conjunction with a computer numerical control (CNC) milling machine. Western Kentucky University (WKU) utilizes a CIM cell in the Senator Mitch McConnell Advanced Manufacturing and Robotics laboratory. The laboratory is located in the Architectural and Manufacturing Sciences …
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Design and Development of a Distributed System for Monitoring of Machine Tool Behavior
… of a distributed system for the monitoring of numerical control machine tools. This work discusses all the design steps from the conceptualization of the hardware architecture to the development and implementation of monitoring algorithms. In the first chapter the state of art in machining …
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Prediction of machined parts distortion by the finite element method
… industry in particular, employs computer numerical control machining to produce the aircraft components. However, it has often been found that problems of distortion occur when thin and slender components are manufactured this way. It is believed that the distortion arises due to the …
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Material Properties of Human Rib Cortical Bone from Dynamic Tension Coupon Testing
… shaped tension coupons using a small computer numerical control machine. A high-rate servo-hydraulic Material Testing System equipped with a custom slack adaptor, to provide constant strain rates, was used to apply tension loads to failure at an average rate of 0.5 strains/sec. The elastic …
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Response of composite and steel V-structures to localised air blast loading-numerical and experimental
… 2 mm thick DOMEX-700 MC sheet and then Computer Numerical Control (CNC) bending them to the desired profile. Three panel configurations were experimentally blast tested, namely, a 105° V-angle with a 32 mm V-tip radius, a 105° V-angle with a 62 mm V-tip radius and a 120° V-angle with a 32 mm …
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Leadership in Reaching Global Consensus on Technologicl Standardization
… Standard for the Exchange of Product Model Data—Numerical Control (STEP NC).</p> <p><em>Methodology</em>. Both quantitative and qualitative methods were used in this study. The quantitative aspects utilize a researcher-developed instrument to assess the perceptions of a select group of …
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On Application of Optimal Control to Intelligent Manufacturing
… of aluminum alloys through a three-axes Computer Numerical Control (CNC) machine tool. The developed controller is called Evaluation and Perception Controller (EPC), and it con- sists of three layers: sensor, perception, and cognitive. A set of sensors displayed in the working volume collect the …
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Gap Waveguide Array Element Filters
… higher frequencies such as W-band are required. Control of spectral emissions in integrated mm-wave systems has so far been neglected due to the limited amount of devices operating at the frequency range. Gap waveguides are a type of waveguide implemented in a periodic metamaterial that offer …
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Multiscale modelling of woven and knitted fabric membranes
… composites. Since the inception of computerised numerical control for three-dimensional textile-manufacturing machines, technical textiles paved their way to numerous applications, certainly not limited to; aerospace, biomedical, civil engineering, defence, marine and medical industries. Digital …
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