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Vibrations at machining of metals
Fiala, Zdeněk ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
The diploma work deals with a mathematical description of vibration and its generation when machining. Moreover, some techniques of modal parameters measurement in the theoretical part are included. The practical part is designed and based on the measured natural frequencies of the machine with specific tool and materials. In conclusion, a lobe diagram stability for semiautomatic lathe SPN 12 CNC and selected machining operation is specified by means of apparatus.
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Vibration at milling of metal
Dvořák, Jan ; Štetina, Jakub (referee) ; Fiala, Zdeněk (advisor)
This thesis contains theoretical description of milling, mathematical description of oscillation and causes of self-excited vibrations during the milling process. It further contains dynamic measurement of machine-tools and stability lobe diagram. At last it states different ways of prevention, removal or maximum reduction of self-excited vibrations during the milling process.
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Regenerative chatter in turning
Sucháček, Roman ; Jaroš, Aleš (referee) ; Fiala, Zdeněk (advisor)
This bachelor´s thesis deals with the vibrations produced during turning. Several principles of these vibrations formation are. This includes regenerative principle and the principle of position feedback. Vibrations are caused by the mutual vibration of workpiece and the tool, with the result that occurs corrugated surface of the workpiece, during the first revolution of workpiece, which also regenerates the vibrations. Vibrations are the most affected by the width of the chip and the workpiece speed. Based on measurements and calculations is drawn stability lobe diagram. The diagram determines the maximum width of the chip, or the maximum speed, for which it is possible to cutting ithout any vibrations.
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Regenerative chatter in turning
David, Václav ; Jaroš, Aleš (referee) ; Fiala, Zdeněk (advisor)
Regenerative chatter in turning negatively affects the cutting process, the tool live and the machined surface. In this work is a vibration discriebed by using mathematical formulas or terms. There are listed some causes of creation vibration in turning and some basic methods of complete removal or partial reduction. The second part of this work contains examples of measure and analysis in connection with using of modern software.
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Vibration at milling of metal
Dvořák, Jan ; Štetina, Jakub (referee) ; Fiala, Zdeněk (advisor)
This thesis contains theoretical description of milling, mathematical description of oscillation and causes of self-excited vibrations during the milling process. It further contains dynamic measurement of machine-tools and stability lobe diagram. At last it states different ways of prevention, removal or maximum reduction of self-excited vibrations during the milling process.
|
|
|
Vibrations at machining of metals
Fiala, Zdeněk ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
The diploma work deals with a mathematical description of vibration and its generation when machining. Moreover, some techniques of modal parameters measurement in the theoretical part are included. The practical part is designed and based on the measured natural frequencies of the machine with specific tool and materials. In conclusion, a lobe diagram stability for semiautomatic lathe SPN 12 CNC and selected machining operation is specified by means of apparatus.
|
|
|
Regenerative chatter in turning
Sucháček, Roman ; Jaroš, Aleš (referee) ; Fiala, Zdeněk (advisor)
This bachelor´s thesis deals with the vibrations produced during turning. Several principles of these vibrations formation are. This includes regenerative principle and the principle of position feedback. Vibrations are caused by the mutual vibration of workpiece and the tool, with the result that occurs corrugated surface of the workpiece, during the first revolution of workpiece, which also regenerates the vibrations. Vibrations are the most affected by the width of the chip and the workpiece speed. Based on measurements and calculations is drawn stability lobe diagram. The diagram determines the maximum width of the chip, or the maximum speed, for which it is possible to cutting ithout any vibrations.
|
|
|
Regenerative chatter in turning
David, Václav ; Jaroš, Aleš (referee) ; Fiala, Zdeněk (advisor)
Regenerative chatter in turning negatively affects the cutting process, the tool live and the machined surface. In this work is a vibration discriebed by using mathematical formulas or terms. There are listed some causes of creation vibration in turning and some basic methods of complete removal or partial reduction. The second part of this work contains examples of measure and analysis in connection with using of modern software.
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