This thesis is focused on design of a new production process for production of the selected component. The theoretical part is focused on the theoretical description of the used machining technologies. The practical part is focused on the analysis of the current method of production selected component and design of a new method of production, the selection of a suitable machine and tools. Last part of this thesis is economic evaluation.

The thesis describesthedesign of a controlsystemfor CNC applicationswhich do not requiresynchronizedmotionofseveral axis atonce. Thegoaliscompatibilitywith G-codethatallowsyou to controlthedevicewith a Cartesiancoordinatesystem. Withthe use ofthenormal PC to run thesystem and communicate via serial line.

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In this study, the material utilization efficiency in terms of cutting yield for two furniture frame models from a local upholstery company was evaluated using computer simulation software with optimization capacity. Effects of full panel size of wood-based composites, furniture frame number, and frame part shape and size on cutting yield were investigated. Simulation results indicate that the cutting yield is affected by full panel sizes and number of frames cut. Curve-shaped parts and small size parts can lower the material cutting yield. The overall material cutting yield obtained with simulation software can reach the range from 80 to 84%, which was higher than the current yield of 79.80% from the company. Optimum cutting yield of 84% can be achieved when 40 frames were produced with 4.5 by 8 feet panel.

Malongen consists of two volumes containing housing, a gallery, and a restaurant. The design language of the base comes from a 3D scan of the rock 30 meters north of the plot. The buildings are a design interaction to explore the tension between the historical mountain cut and a design interaction. With a digital imitation of the rock the buildings intend to mimic the surrounding area. The rock, that is the historical imprint of the place, is now translated into buildingelements, as a result of my manipulation of the file. This project has investigated how we can create a contemporary buidling that refer to a historical site and keep telling a story about time.

This is the Master’s Thesis work of Benjamin R Caras, MFA University of Massachusetts, May 2008. The work focused on an exhibition of artwork and supporting paper. The artwork is a visual discussion of digital production fused with the concept of artist self sufficiently. It asks the viewer to consider the free exchange of ideas within an organic knowledge base, while questioning the closed loop system of capitalism. It reminds us that working together to solve problems is integral to our survival

Randek is a company that develops machines. The machines are used to build prefabricated houses. They have developed a CNC machine called Nailing Bridge that creates house walls. One of their issues is that they must predict the time it takes to build a wall because their customers need to know how long it takes to deliver their house. Our project solves this problem by making a program that calculates the time it takes to build a wall on the Nailing Bridge with help from NC files (Numerical Control files) consisting of G-code. One NC file contains the machine's operations, such as sawing, nailing, and routing. The goal was to develop a program with a maximum margin of error of 3% from reality. The machine was tested to measure the time of different operations to develop the program, and the NC files were analysed. Calculations for the jerk, acceleration, deceleration, and velocity of the CNC machine were considered to predict the time of the movements with high enough precision. The calculations and implementation are written in C#. A GUI is created for the user to use the program easily. The end product is a program that can take in one NC file and gives output on the time it should take for the Nailing Bridge to go through the file. The margin of error was between 5% to 31% for one operation of sawing or nailing, which is significantly higher than the goal of 3%. The program was therefore debugged with unit testing and new tests of the Nailing Bridge to find the sources for this margin of error. The conclusion is that the program works but not exactly to the company's standards.

<p> The purpose of this project was to develop an Adaptive Control Algorithm for a CNC milling machine. The milling machine is controlled by a 2100A Hewlett Packard mini-computer. The Adaptive Control Software has to operate in unison with an already available Numerical Control Software. Both these programmes are stored in the computer and the computer operates on them with the aid of the interrupt pulses received from the Time Base Generator located in the Controller.</p> <p> The Adaptive Control Software should be capable of optimising the milling process, that is enabling the milling machine to operate at the highest feed-rate without violating or overriding the maximum permissible values of the horizontal force and torque acting on the cutter. These maximum values of the force and torque are determined from the tool strength and capacities of the servo drives and spindle motor. Further, the machine should be able to arrive at the above feed-rate in the shortest possible time interval without causing cyclic variations in the feed-rate which could lead to an unstable system. The programme should be able to obtain ten samples of the parameters per revolution of the spindle. The feed-rate thus obtained (after comparing with the maximum and minimum feed-rates of the machine and making any corrections, if necessary) should be stored in a memory location accessible to the Numerical Control Programme. The instantaneous values of the force and torque are transmitted to the computer via the transducers attached on the spindle of the machine and the Analog-to-Digital Processor, therefore, the Adaptive Control Software will have to communicate with the Analog-to-Digital Processor in order to receive the values of the forces and torque. Thus the above mentioned requirements will have to be met by this piece of software. With this end in view, the following algorithm was developed.</p> <p> The algorithm consists of two portions, namely, the Data Reading Routine and the Policy Routine. The former accepts the two horizontal forces (which are phase shifted by 90°) and the torque acting on the cutter by communicating with the Analog-to-Digital Processor. However, all these three parameters are received through the same channel from the Analog-to-Digital Processor as such a method of identifying the variables was necessary. For this purpose, the Data Reading Routine consists of software capable of communicating with the Analog-to-Digital Processor at time intervals of 10 m.sec. and receiving the data in a digital form, decoding the input and ascertaining which input parameter was received. The Policy Routine has two modes of operation viz., the constraint and optimizing modes. This routine ascertains the critical error and arrives at the new feed-rate depending on the Policy used. After checking the value of this feed-rate with the maximum and minimum feed-rates available on the machine (and corrections made if necessary), the suitable value of this feed-rate is stored in a memory location accessible to the Numerical Control programme. This gives the general structure of the Adaptive Control Algorithm developed in this project.</p> / Thesis / Master of Engineering (MEngr)

This thesis describes a sequence of experiments which have been performed with the intention to produce synthetic nacre. Synthetic nacre is a biomimetic material based on nacre, a material which can be found in mollusc shells. Nacre is a nanocomposite which has improved mechanical properties compared to the principal component aragonite (95% wt%). The improved properties of nacre are derived from the polymeric components in the composite which allows from redistribution of forces under load. Carbonates sequester CO2 in the geological CO2-cycle. If precursor are sourced correctly, the CaCO3 in synthetic nacre can temporarily sequester CO2. Crystals with the intended pseudohexagonal morphology have been synthesised. However, subsequent quantitative analysis could not support these findings in a follow-up experiment. This discrepancy might have been caused by differences in the method. Moist nanopaper was found to be mineralisable while maintaining a layered structure.

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