Browsing by Author "Kirschner, Vít"
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- ItemStanovení vlivu mechanických hodnot materiálu na velikost odpružení(Technická Univerzita v Liberci, 2009) Kirschner, Vít; Solfronk, PavelThe bachelor thesis deals with the spring-back in the bending of sheet material S235JR EN 10025-2. The task of this work is to establish the effect of material mechanical properties on the size of the spring-back. Furthermore, the aim is to assess the existence of dependence of the deviation size of the dimensions on the mechanical values of formed material on the wings of fork-lift trucks. The experiment should clarify what is the main reason for deviations of the dimension during the part bending on the hydraulic press.
- ItemÚprava geometrie ohýbacího nástroje pro výrobu blatníku manipulačních strojů(Technická Univerzita v Liberci, 2012) Kirschner, Vít; Solfronk, PavelThis thesis deals with the modification of the bending tool geometry for production handling machines fender. The requirement for the bending tool shape change results from unsatisfactory dimensional accuracy of existing products. As the consequence of variations of production tolerances there is necessity to include other technological operations. The measuring of tested material mechanical properties by using a static tensile test is carried out in the thesis experimental part. Moreover, the actual real dimensions of tool and real stamping were determined by using non-contact optical 3D scanner REVscan. The bending tool shape change was carried out by numerical simulation at software PAM-STAMP 2G. To verify the applicability of this solution there was created the comparative numerical simulation of the technological process for production forklift fender under the respecting all process conditions. On the basis of numerical simulation was carried out a proposal for shape change of the bending tool in the CDS holding Company Ltd.