The objective of this work is to develop a band saw tensioner from the drafting of the specifications to the testing of the prototype while finding the optimal solutions technologically and financially. This development covers the mechanical design and dimensioning of the entire machine. In this repport every step of the project are covered, the benchmark, the specifications, the design and dimensioning, and finally the financial study.

O presente trabalho apresenta uma revisão bibliográfica sobre o processo de serramento por serra de fita, abordando fatores relativos ao desempenho de corte nas diversas operações deste processo. Na seqüência, apresentam-se os seguintes estudos específicos: características da madeira que exercem influência nas operações de serramento por serra de fita: o processo de serramento e; ferramentas de corte. A fim de se verificar os aspectos teóricos especificados na literatura para adequação do processo de serramento, efetuou-se um estudo de caso em uma serraria, usinando-se a espécie de madeira Pinus oocarpa em operação de desdobro com serra de fita vertical. Neste estudo, realizou-se a medição da potência consumida durante o corte com aquisição de dados em tempo real, a qual possibilitou calcular a potência de corte média. / The present work shows a bibliographical review on band sawing, in respect to the factors related to cutting performance during the several operations of such process. Moreover, the following studies are presented: wood characteristics influencing the band sawing; sawing process itself; and cutting tools. In order to check the theorical aspects encountered in the literature to adequate the sawing process, a case study in a sawmill plant has been carried out. Pinus oocarpa wood species has been machied by unfolding using a vertical bandsaw. The consumed power during the cutting process was measured by a data acquisition system in real time, what allowed the calculation of the average cutting power.

O presente trabalho apresenta uma revisão bibliográfica sobre o processo de serramento por serra de fita, abordando fatores relativos ao desempenho de corte nas diversas operações deste processo. Na seqüência, apresentam-se os seguintes estudos específicos: características da madeira que exercem influência nas operações de serramento por serra de fita: o processo de serramento e; ferramentas de corte. A fim de se verificar os aspectos teóricos especificados na literatura para adequação do processo de serramento, efetuou-se um estudo de caso em uma serraria, usinando-se a espécie de madeira Pinus oocarpa em operação de desdobro com serra de fita vertical. Neste estudo, realizou-se a medição da potência consumida durante o corte com aquisição de dados em tempo real, a qual possibilitou calcular a potência de corte média. / The present work shows a bibliographical review on band sawing, in respect to the factors related to cutting performance during the several operations of such process. Moreover, the following studies are presented: wood characteristics influencing the band sawing; sawing process itself; and cutting tools. In order to check the theorical aspects encountered in the literature to adequate the sawing process, a case study in a sawmill plant has been carried out. Pinus oocarpa wood species has been machied by unfolding using a vertical bandsaw. The consumed power during the cutting process was measured by a data acquisition system in real time, what allowed the calculation of the average cutting power.

This thesis deals with the proposal of production technologies for a band saw clamp plate. Introduction of thesis is focused on problematics about selected component. In the next section, there are described technologies, which were used in the thesis. Practical part is about proposals of conventional and unconventional production methods. Methods are evaluated in the conclusion of thesis.

The theme of this thesis is design of horizontal band saw and it deals with problems of existing machines on market. Main goal of work is to create effective design and solution of problematic parts, with emphasis on modernization of band saws, which ones processing raw tree trunks.

The master thesis deals with the design and manufacture of tabbed joint in the profile with a square cross section using laser cutting. They examine their suitability and impact on the following MAG welding operation in terms of efficiency and accuracy. The theoretical part provides basic information about lasers used in industry and laser cutting methods. There is also a section dedicated to laser apparatus for tube cutting along with problematic about the laser cutting profiles. The experimental part describes the procedure of designing tabbed joint, making samples and measuring them. In the end, the individual samples are compared in terms of angular deflection after welding. The thesis also contains a technical-economic evaluation, where the costs of individual operations are quantified.

This Master's thesis summarizes the current legislative requirements resulting from the Directives of the European Parliament and Council and the legislative requirements of the Czech Republic in the field of cutting machines, with a focus on band saws. Furthermore, there is also an analysis of the requirements of the relevant harmonized standards. For information sorting, check lists for the construction of a band saw and a process map of the construction of the saw have been made. In the last part of this work, the selected safety applications were completed for the band saw.

The thesis deals with possibilities of using of mobile band saws. An economic analysis of band saw utilization for woodworking was carried out. Further the work evaluates and analyses the technological string of lumber production in a selected area. In the first part there is a study of current state of technological string of saw timber production. The second chapter deals with the evaluation of state in consideration of woodworking in relation to selected location of production facilities. The third part is focused on evaluation of possibilities of mobile band saw utilization that is carried out on Husqvarna SMB - 70. The fourth section describes technological variations and tries to determine criteria for choosing of the best variant. It details opportunities of a small - grower that tries to find the most suitable variant by selling a wood, so as it brings the maximum profit. The work deals with various possibilities of timber production in which the band saw is included. Technical parameters of particular saws are described here. And by means of economic parameters the most suitable technology for sawn wood production is determined. The goal of this thesis is to choose a suitable technology for timber production based on economic analysis and with regard to conditions of the processing plant.

This master's thesis deals with separation of metallurgical materials focused on cutting and other general methods of material separation. The aim of this thesis is to focus on cutting of rolled material by saw, specification of technological aspects of cutting of rolled materials, techno-economic analysis of the problem

The concept duty of care is defined as heedful, careful guarding, supervision of a minor, and/or overseeing. An obligation rests on teachers to scrupulously see to the safety (and also the well-being) of all learners entrusted to them. Hence teachers are responsible for the physical safety of learners and for creating a safe haven for them. The Civil Technology workshop teacher has an increased caring duty towards his learners due to the potential life-threatening circumstances and conditions that can prevail in his workshop compared to, for instance, the ordinary classroom environment. Furthermore, a specific legal duty rests on a person when he is placed in control of dangerous objects or machinery, seeing that he has to see to it that he ensures the safety of others through positive action. Internationally, the circular saw is statistically speaking seen to be the most dangerous woodwork machine in the Civil Technology workshop. Circular saws are responsible for more accidents than any other machine, and the most claims for damages against teachers and school managements also arise from it. Due to the underlying dangers inherent to circular saws and the presence thereof in Civil Technology workshops, it increases the risks attached to the caring supervision duty of the Civil Technology teacher to a great extent. Civil Technology workshop teachers are therefore confronted by unique challenges in their workshops. Hence it is essential that they be equipped with sufficient knowledge pertaining to educational law so as to make head against these challenges. Civil Technology workshop teachers should therefore not only be aware of all common law principles, relevant legislation and case law as applicable to workshops, but also be able to apply it in practice in the workshop environment. This practical application furthermore requires workshop teachers to be knowledgeable to be able to maintain workshop machinery in a safe working condition through regular upkeep and maintenance. An empirical investigation (n=38) was launched, based on a questionnaire filled in by all Civil Technology teachers and their heads of department North West where Civil Technology is presented as a choice subject at high schools. The aim of the empirical investigation was to determine: * what the level of Civil Technology workshop teachers‘ expertise and knowledge is regarding legal key issues concerning their caring supervising duty, and * to what extent effective safety management of woodwork machinery in Civil Technology workshops is applied. The empirical investigation found, amongst others, that: * The respondents do not have sufficient knowledge of the principles pertaining to educational law to apply it in the Civil Technology workshops of the study population practically. * Civil Technology workshop teachers and heads of department should have a high degree of expertise with a view to execute their duty of care. Poor educational law training can possibly be proffered as reason why their level of expertise cannot be seen to be sufficient in a case where an increased level of duty of car is required in potentially dangerous workshops. Following on above-mentioned findings, specific recommendations were made to all role-players involved that are involved in learner safety in Civil Technology workshops. These recommendations may possibly contribute to increased and more effective caring supervision in promoting learner safety. / Thesis (MEd (Education Law))--North-West University, Potchefstroom Campus, 2012