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Production of LKG castings and cost comparison depending on the melting furnace
Exner, Zbyněk ; Šenberger, Jaroslav (referee) ; Záděra, Antonín (advisor)
This thesis is focused on technology of manufacturing ductile cast iron by using metal melted in cold blast cupola. The temperatue of cast iron melted in cupola furnace is often insufficient for subsequent metalurgicall processing of the cast iron, i.e. modification. Chemical heating could be used as an alternative for the needed increasement in temperatue of the melted metal before a modification. For the purposes of the experiment, a ladle for chemical heating was designed and manufactured within the diploma thesis. Furthermore, the work presents the results of two test melts, in which cast iron corresponding to EN-GJS-500-7 was produced after heat treatment. The thesis includes images of the structure of cast samples and samples even after heat treatment. Furthermore, the work presents an optimization solution for the charge comosition to the cupola furnace in order to reduce the phosphorus content. For the overall economic evaluation, the composition the charge comosition for the production of sferoidical graphite (SG) iron on the electric induction furnace was proposed and its costs were compared with the possibilities of SG iron production at the cupola furnace. Based on the determined costs of individual variants, the return on the transition from a cupola furnace to an electric induction furnace was calculated.
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Manufacturing of aluminium alloy castings in sand mould
Exner, Zbyněk ; Roučka, Jaromír (referee) ; Záděra, Antonín (advisor)
The thesis theoretically deals with research activities in the field of molding mixtures, description and division of aluminum alloys for castings. Furthermore, the thesis presents the process of production of the cylinder head of the internal combustion engine Jawa 50, from the design of a 3D model and its production by 3D printing to its casting from aluminum alloy EN AC-46000. Molds from bentonite, self-hardening and oil-bentonite molding mixtures were used to cast the test casting. To complement the experiment, the casting was also made using the lost-wax casting method. For the production of wax models, it was necessary to make a mother mold. Subsequently, two different ceramic shells were made. The first one was designed to cast only one casting, the second one, with a different orientation of the models to the inlet, allowing to cast two pieces of castings at once.
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Production of LKG castings and cost comparison depending on the melting furnace
Exner, Zbyněk ; Šenberger, Jaroslav (referee) ; Záděra, Antonín (advisor)
This thesis is focused on technology of manufacturing ductile cast iron by using metal melted in cold blast cupola. The temperatue of cast iron melted in cupola furnace is often insufficient for subsequent metalurgicall processing of the cast iron, i.e. modification. Chemical heating could be used as an alternative for the needed increasement in temperatue of the melted metal before a modification. For the purposes of the experiment, a ladle for chemical heating was designed and manufactured within the diploma thesis. Furthermore, the work presents the results of two test melts, in which cast iron corresponding to EN-GJS-500-7 was produced after heat treatment. The thesis includes images of the structure of cast samples and samples even after heat treatment. Furthermore, the work presents an optimization solution for the charge comosition to the cupola furnace in order to reduce the phosphorus content. For the overall economic evaluation, the composition the charge comosition for the production of sferoidical graphite (SG) iron on the electric induction furnace was proposed and its costs were compared with the possibilities of SG iron production at the cupola furnace. Based on the determined costs of individual variants, the return on the transition from a cupola furnace to an electric induction furnace was calculated.
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Manufacturing of aluminium alloy castings in sand mould
Exner, Zbyněk ; Roučka, Jaromír (referee) ; Záděra, Antonín (advisor)
The thesis theoretically deals with research activities in the field of molding mixtures, description and division of aluminum alloys for castings. Furthermore, the thesis presents the process of production of the cylinder head of the internal combustion engine Jawa 50, from the design of a 3D model and its production by 3D printing to its casting from aluminum alloy EN AC-46000. Molds from bentonite, self-hardening and oil-bentonite molding mixtures were used to cast the test casting. To complement the experiment, the casting was also made using the lost-wax casting method. For the production of wax models, it was necessary to make a mother mold. Subsequently, two different ceramic shells were made. The first one was designed to cast only one casting, the second one, with a different orientation of the models to the inlet, allowing to cast two pieces of castings at once.
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