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Producing of aluminum shell
Šindelka, Karel ; Peterková, Eva (referee) ; Lidmila, Zdeněk (advisor)
The bachelor's thesis is focused on the design of a large-caliber signal cartridge. As a semi-finished product, a dome is chosen, which will be cut from aluminum sheet, according to the ČSN 42 4005 standard. Thanks to good cold formability and a large production series, it is suitable to use back-extrusion technology. The semi-finished product for this operation is a calibrated roller, from which a thin-walled cup is subsequently formed. Another operation is the shaping of the bottom of the cartridge case, in which it is necessary to create a flange and a cavity for the match. Since the semi-finished product is cut from a sheet metal sheet, it is advisable to choose multi-row cutting, in which the material utilization is about 70%. Thanks to the combined set of tools, it is possible to perform several operations per machine stroke. In this way, hundreds to thousands of pieces can be produced per hour. The extruder and extruders are made of tool steel 19 423 according to the drawing documentation.
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Producing of aluminum shell
Šindelka, Karel ; Peterková, Eva (referee) ; Lidmila, Zdeněk (advisor)
The bachelor's thesis is focused on the design of a large-caliber signal cartridge. As a semi-finished product, a dome is chosen, which will be cut from aluminum sheet, according to the ČSN 42 4005 standard. Thanks to good cold formability and a large production series, it is suitable to use back-extrusion technology. The semi-finished product for this operation is a calibrated roller, from which a thin-walled cup is subsequently formed. Another operation is the shaping of the bottom of the cartridge case, in which it is necessary to create a flange and a cavity for the match. Since the semi-finished product is cut from a sheet metal sheet, it is advisable to choose multi-row cutting, in which the material utilization is about 70%. Thanks to the combined set of tools, it is possible to perform several operations per machine stroke. In this way, hundreds to thousands of pieces can be produced per hour. The extruder and extruders are made of tool steel 19 423 according to the drawing documentation.
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