Vibrationsförderer sind Stetigförderer, welche Fördergüter durch periodische Schwingbewegungen in gerichtete Bewegungen versetzen. Vibrationsförderer sind in der Handhabungstechnik, der Zuführung von Mikrobauteilen und feinen Pulvern, sowie in der Schüttgut verarbeitenden Schwerindustrie weit verbreitet. In dieser Arbeit erfolgt nach der Betrachtung des Stands der Technik von Vibrationsförderern und den Interpretationsmöglichkeiten der Förderorganbewegung, die Vorstellung und Diskussion weiterer analytischer Berechnungsansätze. Anschließend werden Störprozesse, die während des Guttransportes auf Vibrationsförderern immer wieder beobachtet werden, erstmals klassifiziert und mathematisch beschrieben. Um die DEM-Simulation von Vibrationswendelförderern und linearen Vibrationsförderern unter Verwendung des Gleit-, Wurf- und Haft-Gleitförderprinzips in der Software LIGGGHTS zu ermöglichen, wurde eine Softwareerweiterung entwickelt. Diese Erweiterung umfasst zwei Module, welche die Bewegungen von importierten CAD-Geometrien auf Basis von als Fourierreihen definierten harmonischen Schwingungen höherer Ordnung ermöglichen. Das Befehlsmodul viblin ermöglicht die Definition von translatorischen Schwingungen. Das Modul vibrot ermöglicht die Definition von Rotationsschwingungen um eine raumfeste Achse. Beide Bewegungsmodule ermöglichen die Definition von komplexen Schwingungszuständen der CAD-Geometrien. Untersuchungen der Mikroprozesse innerhalb einer Arbeitsperiode zeigen, für die Förderarten Wurf und Gleiten, alle notwendigen Abschnitte der Kraft- und Geschwindigkeitsverläufe am Fördergut. Die durchgeführten Validierungen stellen die Verwendung der DEM als Simulationswerkzeug in der Vibrationsfördertechnik sicher. Auf der Basis der abschließend durchgeführten Parameterstudien können in Zukunft Kalibrierungsmethoden bezüglich des Verhaltens von Partikeln auf vibrierenden Unterlagen entwickelt werden. / Vibratory conveyors are continuous conveyors which move the materials to be conveyed by periodic vibrations of the conveyor chute. Vibrating conveyors are used in handling technology, the supply of micro components and fine powders, as well as in bulk material processing heavy industry. Within this work the state of the art of vibratory conveyors and alternative interpretations of the conveyor movement are introduced. Afterwards further analytical approaches are discussed. Subsequently, interfering processes, which occur during the transport of the materials on vibratory conveyors are classified and mathematically described. To simulate vibrating spiral conveyors and linear vibration conveyors using the sliding, throwing or sticking-glide conveyor principle in the software LIGGGHTS, a software extension was developed. This extension includes two software modules, to define the movements of imported CAD geometries on the basis of as Fourier series defined harmonic oscillations. The viblin command module allows the definition of translatory vibrations. The module vibrot allows the definition of rotational vibrations around a fixed axis. Both motion modules allow the definition of complex vibrational states of the CAD geometries. Investigations of the micro processes within a working period showed all necessary sections of the force and speed progression on the conveyed particles for the conveyor principles of micro throw and slide. The validations constitute the basic function of the DEM as a simulation tool in the vibratory conveyor technology. The final parameter studies can be used to develop calibration methods to describe the motion of particles on vibrating plates

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At Swisslog there is no up to date model for selecting the electric motors for their conveyor elements. The current model and measurements are about 20 years old and the motors and conveyors have changed in that time. To get a better picture and basis for the selection of the electric motors a calculation model for the torque requirement for different pallet weights was produced in this work. The model was further expanded to involve the calculated overhung load, the root mean square power and the permitted switching frequency for the motors which would also aid in the decision of which motor would fit for each application. To verify the model a number of different tests were completed to measure the actual torque from the motor when the conveyors were in use. The model and the testing results had a reasonable resemblance. From the calculations an excel document was also developed which used the calcualtions as a basis to give a selection of motors that can function at a number of different pallet weights and conveyors. The excel document implements all of the calculations from the models to enable a simple choice of motor for the specific conveyor element for the designer at Swisslog.

Belt conveyor accidents are mainly attributed to negligence of safety procedures during maintenance work. Entanglement, falling from heights, & collapse of structure or loose materials are the main cause of accidents. While performing maintenance tasks such as cleaning, installation and repair, belt alignment and so on (Lucas et. al. 2007). Current industry safety programs provide general guidelines for safety training, but do not require any specific training program structure (Shultz, 2002 and Shultz, 2003). For example MSHA (Mine Safety and Health Administration) only requires 24 hours of training. Typically this training is broken down into four hours of training before the employee starts work, the remaining 20 hours has to be performed within the first sixty days of work (Goldbeck, 2003). The information collected through site visits showed that in addition to completing MSHA safety training requirements companies try to reinforce safety issues through daily and weekly safety meetings on job sites. Due to lack of a required safety training structure, every company is independent in terms of their training format that they follow to train their new and experienced work force. As a result, safety engineers depend heavily on in-house safety programs (e.g. audio-video presentations) to deliver the required training hours specified by MSHA for miners. Based on a review of current training methods this research identifies four problems; existing training methods to educate miners about dangers involved in conveyor belt environments are mainly passive, safety related information in scattered in various media such as images, videos, paper manuals, etc., access to information in current format is difficult, and updating information is difficult. This research addressed these identified problems by devising a new approach of learning to augment existing methods of training and evaluate the potential of this concept as a safety-training tool. Research has shown that individuals have their own learning style in which they can increase their retention and stimulate their cognitive learning. The proposed work addresses issues relative to passive vs. active learning and classroom-based vs. self-paced training by developing and implementing an interactive multimedia-based safety-training tool called the Digital Safety Manual (DSM). After the DSM was developed it was put through a series of usability evaluation and subjective analysis to measure the potential of the concept. The evaluation and subjective analysis involved both the novice and expert users. The results that were yield after the evaluations and subjective analysis shows that the DSM has more learning advantages than the typical training methods and it can be used as a supplementary training method to complement the current approaches of training. / Master of Science

This master thesis deals with the construction design of two different pipeline drag chain conveyors for transport of wheat and sewage sludge. The first part describes the operation principle and the main parts of this conveyor. The examples of designs from several manufacturers follow. Next part is devoted to determining the resistance to movement in individual sections of the transport route. Thesis continues with design proposals of both variants of conveyors, including suitable technological and strength calculations. The outputs of this work are also assembly drawings of these two conveyors.

This diploma thesis is focused on the construction proposal of pallet hoist connected with powered section roller conveyor for transportation of europallets with loads 1200 kg. The proposed hoist is designed for vertical handling between two working positions with the distance 5 meters. The thesis contains all structural units of machine, design of all standars parts and control calculation of some parts using the finite element method (FEM). The thesis contains complete drawing documentation for designed machine.

The diploma thesis is focused on the construction design of elevator for pallets with car seats weighing 200 kg. This device is proposed for vertical transport of the load between two working positions which are separated by 6m. Part of the pallet hoist is a roller conveyor attached on a lifting frame. The roller conveyor allows loading and unloading pallets from the fixed roller conveyors in the lower and upper station. There are the functional calculations of important parts, strength control of traction belt and shaft of driving pulley drum. By FEM (Finite Element Method) is detected stress distribution of the lifting frame. Parts of the annex are the manufacturing drawings of the lifting frame, shaft of driving drum, the driving station and drawing of the whole assembly vertical conveyor. Furthermore, the timing diagram function for one cycle, risk analysis and FMEA.

Master’s thesis deals with design of rail-to-rail second generation current conveyor in CMOS technology. Describes principles of function of different generations of current conveyors, as well as the basic principle of design of second generation current conveyor based on operational amplifier. Addresses circuit topology of input rail-to-rail stage and class AB output stage. The objective of this thesis is to design, characterize performance and create layout of second generation current conveyor with input common mode voltage rail-to-rail capability in ONSemi I3T25 technology.