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Machining processes in furniture industry
Černý, Marek ; Kalivoda, Milan (referee) ; Chladil, Josef (advisor)
This master thesis deals with machining processes in the furniture industry. Various group of materials, which are used in furniture industry are described there. Then there are described assembly and machining processes, such as manual and machine. In practical part, the production process for the selected sample product was proposed. The production was performed in a specific company, which has suitable machinery and tools. Sample product was made from double-sided laminated medium density fibreboard, which belongs to the group of wood-based materials. As a part of the debugging produciton process, the dependence tool life at cutting speed was experimentaly found. The experiment was performed on CNC milling machine with cutting speeds in the range 453 to 905 m.min-1, width draft of cutting edge 9,5 mm and feed per tooth 0,05 mm. Analog passametr Somet with an accuracy 0,001 mm was used to measure tool wear. The measured data were recorded and evaluated in program Excel. The resulting dependency tool life at cutting speed can be used in other machining operations. After performing the experiment, each parts of the product were produced and mountig was performed. The conclusion of the thesis contains an evaluation of the proposed production process.
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Wear of cutting tools at CNC production of the disc-shaped parts
Malý, Michal ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
This diploma thesis evaluates two competitive cutting inserts for machining of disk-shaped blanks. The first part summarizes theoretical knowledge of turning, wear of cutting inserts and cost analysis of the cutting process. In the second part, the wear of two inserts from a different manufacturer is observed in two different cutting speeds. Wear is evaluated by electron microscope images. In the end, there is an economic evaluation of both VBD in different cutting speeds for serial production.
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Evaluation of machinability of a 3D printed material
Krestová, Alžběta ; Chladil, Josef (referee) ; Kolomý, Štěpán (advisor)
The aim of the bachelor thesis was to evaluate the machinability of 3D printed material by Bound Metal Deposition method under different conditions during milling. The forces during machining were measured and the surface roughness and the resulting wear on the tool were also investigated. The values were recorded and further evaluated, where the results were compared and recommendations were made as to the conditions under which low values of wear are produced. The result was that lower wear values are achieved when machining without cooling and at low cutting speed and feed rate.
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Machining processes in furniture industry
Černý, Marek ; Kalivoda, Milan (referee) ; Chladil, Josef (advisor)
This master thesis deals with machining processes in the furniture industry. Various group of materials, which are used in furniture industry are described there. Then there are described assembly and machining processes, such as manual and machine. In practical part, the production process for the selected sample product was proposed. The production was performed in a specific company, which has suitable machinery and tools. Sample product was made from double-sided laminated medium density fibreboard, which belongs to the group of wood-based materials. As a part of the debugging produciton process, the dependence tool life at cutting speed was experimentaly found. The experiment was performed on CNC milling machine with cutting speeds in the range 453 to 905 m.min-1, width draft of cutting edge 9,5 mm and feed per tooth 0,05 mm. Analog passametr Somet with an accuracy 0,001 mm was used to measure tool wear. The measured data were recorded and evaluated in program Excel. The resulting dependency tool life at cutting speed can be used in other machining operations. After performing the experiment, each parts of the product were produced and mountig was performed. The conclusion of the thesis contains an evaluation of the proposed production process.
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Optimization of the production process of a precision machined part
Kolomý, Štěpán ; Sedlák, Josef (referee) ; Píška, Miroslav (advisor)
This master‘s thesis deals with optimization of cutting conditions when machining of precise parts in mass production. In experimental part of this thesis is a comparison of the roughing tool with indexable cutting inserts with the new implemented milling cutter. Tool wear of both roughing tools has been analysed. The surface roughness analysis after machining with the face milling cutter was performed. The output of this work is to obtain optimal cutting conditions to gain a minimum surface roughness.
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Testing and Analysis of a Broaching Machine
Dvořák, David ; Chladil, Josef (referee) ; Sedlák, Josef (advisor)
This master's thesis deals with the broaching technology. Theoretical part includes the essay about the technology, tools and machines used for broaching. Theoretical part also describes the analysis of the broaching machine testing. Practical part is focused on the collecting, comparing and analysis of the data. These data have been collected during and after the broaching process. The supplier of the new analysed broaching machine is Stenhoj Hydraulik and the older machine has been made by Arpini. The measurements show that the increased number of broached pieces influence the cutting force and the quality of the surface due to wear of the tool which has been also monitored. The measuring dimension through the ball is almost constant. In the conclusion we evaluated the economical aspect of the results.
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Tool wear testing method of cutting tools with cermet cutting edges in turning
Koppová, Aneta ; Kouřil, Karel (referee) ; Sedlák, Josef (advisor)
The diploma thesis deals with the analysis of the wear of tools fitted with cermet cutting edge. The first part is focused on the theoretical aspects of the problem, which are applied in the practical part. The aim was to perform cutting tests in which carbon steel was turned under selected cutting conditions. Tool wear during turning and the quality of the machined surface were monitored. Machining continued until the selected wear criterion reached the limit value. Two different cermets were tested and the measured data were the basis for the analysis of the wear of the tool edges and the determination of the tool life.
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Efficiency improvement proposal of machining specific components of pneumatic cylinders
Židlický, Ondřej ; Chladil, Josef (referee) ; Sedlák, Josef (advisor)
This Master thesis aims to increase the effectivity of the machining of pneumatic cylinders specific components. In the first chapter, the concurrent approach to the manufacture of corrosion resistant austenitic piston rod. This approach consists of the technological procedure, the analysis of the cutting tools used in the process and the cutting conditions. The machining process deals with low durability of cutting tools and the necessity of continual supervision by the operator. Therefore, an alternate design of cutting tools and cutting conditions is suggested in the next chapter. The new design has been tested in manufacture process. In the last chapter, the concurrent and the innovative approach are compared. By choosing the proper cutting tools and cutting conditions it was managed to increase the durability of cutting tools and to increase the effectivity of the whole manufacture process.
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Wear of cutting tools at CNC production of the disc-shaped parts
Malý, Michal ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
This diploma thesis evaluates two competitive cutting inserts for machining of disk-shaped blanks. The first part summarizes theoretical knowledge of turning, wear of cutting inserts and cost analysis of the cutting process. In the second part, the wear of two inserts from a different manufacturer is observed in two different cutting speeds. Wear is evaluated by electron microscope images. In the end, there is an economic evaluation of both VBD in different cutting speeds for serial production.
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On the evaluation of cutting performance when machining
Kolomý, Štěpán ; Fiala, Zdeněk (referee) ; Píška, Miroslav (advisor)
This bachelor thesis focuses on cutting performace during intterupted cutting conditions and on the problems of intermittent turning. There is tested cutting performace of indexable inserts from cubic boron nitride and ceramic during interrupted face turning in experimental part. Tools wear and shape of chips are analyzed. The output of this work is data processing and their comparison.
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