National Repository of Grey Literature 2 records found  Search took 0.02 seconds. 
Optimisation of punch tool for produce holes of bearing cage
Matail, Petr ; Jopek, Miroslav (referee) ; Peterková, Eva (advisor)
The thesis is focused on analysis of causes of blanking punch cracking, which is used for piercing holes of barrel bearing cages and designing of new construction solution by changing shape of blanking punch. Multiple variants of rounding shearing edge and chamfering shearing edge was designed. The current state and designed variants were analysed by simulation in Simufact Forming program. The variants were compared by shear force progress, equivalent stress, contact pressure in blanking punch and effective plastic strain in blank cage. According to mentioned criteria the best solutin with rounding shearing edge by 0,7 mm and chamfering face of blanking punch by 10° was chosen.
Machining of titanium alloys and difficult-to-machine alloys with milling
Matail, Petr ; Dvořák, Jaromír (referee) ; Píška, Miroslav (advisor)
This thesis deals with issue of machining difficult-to-machine alloys with milling. The theoretical part is devoted to the analysis of application, composition and mechanical properties of these alloys and difficulties and recommendations during machining. In the practical part the milling of Ti6Al4V–ELI alloy was realized by profile cutter. Machining forces were evaluated in relation with angle of cutter tilt.

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