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Milling of Thin-Walled Parts for Aircraft Industry
Chuvashev, Anton ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
This diploma thesis deals with issues in machining of thin-walled components. Its first part describes materials used in the aircraft industry. Then it focuses on issues associated with the prediction of deflections of a rib wall during machining. Later on it focuses on different methods and strategies of thin-walled part milling. The diploma thesis also describes an experiment of manufacturing thin-walled components in the form of ribs and evaluation parameters such as roughness, perpendicularity and straightness deviations, width of the rib and force loading of a cutting tool as measured by various gages. The final part is devoted to a calculation of the specific cutting force and its comparison with its theoretical value.
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Milling of Thin-Walled Parts for Aircraft Industry
Lekeš, Jonáš ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
Bachelor thesis deals with materials used in the aircraft industry, then theoretical analysis and prediction of deflection of plate and tool when machining a thin-walled piece. Then it describes an NC error compensation method, which define and minimizes a part deflection with use of three dimensional cutting force model and modeling of part and tool. Final part is about practical experiment where different computational and measuring techniques where applied to determine a part deflection.
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Milling of Thin-Walled Parts for Aircraft Industry
Chuvashev, Anton ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
This diploma thesis deals with issues in machining of thin-walled components. Its first part describes materials used in the aircraft industry. Then it focuses on issues associated with the prediction of deflections of a rib wall during machining. Later on it focuses on different methods and strategies of thin-walled part milling. The diploma thesis also describes an experiment of manufacturing thin-walled components in the form of ribs and evaluation parameters such as roughness, perpendicularity and straightness deviations, width of the rib and force loading of a cutting tool as measured by various gages. The final part is devoted to a calculation of the specific cutting force and its comparison with its theoretical value.
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Production improvement of an aeronautical part
Laforce, Francois ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
Since aircrafts manufacturers intend to produce low consumption and efficient aircrafts, parts become more and more difficult to machine. Some processes like „air machining“ enables a one-step production for complex aluminium alloy shaped parts. Although the assembly offers a large access to cutting tool, the lack of stiffness for large parts, and especially for thin-walled aeronautics parts implies strong vibrations during machining. The aim of the study is to solve these difficulties in order to keep productivity and improve surface quality. Further innovative solutions are considered like modal analysis, in-phase machining, spindle speed variation, 3 flutes end mill and variable helix angle mill. All propositions are tested on DMG 65 machine tool with Siemens 840D controller. Although vibrations are intrinsic to flexible parts, surface quality has been improved with higher cutting continuity and variable helix angle cutting tool.
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Milling of Thin-Walled Parts for Aircraft Industry
Lekeš, Jonáš ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
Bachelor thesis deals with materials used in the aircraft industry, then theoretical analysis and prediction of deflection of plate and tool when machining a thin-walled piece. Then it describes an NC error compensation method, which define and minimizes a part deflection with use of three dimensional cutting force model and modeling of part and tool. Final part is about practical experiment where different computational and measuring techniques where applied to determine a part deflection.
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