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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Study of the deformation of the circular holes in relation to their spacing from the bend in the two-point bending of the sheet on the bend press
 Piterka, Miloslav ; Řiháček, Jan (referee) ; Mrňa, Libor (advisor)
The thesis is focused on studying deformation of the circular holes in the limit bending space, depending on the material type, distance from bend, the thickness of material and diameter of hole. After analyzing all necessary technological parameters was bending technology on press brake selected. An experiment for which the tools and press brake Trumpf TruBend 5170 were selected was designed and performed. Samples for the study were designed, bent and measured. The charts have been prepared for practical use in the company from measuring. In addition, simulations were processed in Ansys program and graphs were compiled to compare the main effect of the hole deformations. Two methods were chosen to prevent deformation in limit bending space. Under-cutting method by laser and method of using special Rollbend tool. In the end, economic studies for the Rollbend tool were developed instead of under-cutting hole with grinding.
Detailed record
Study of the deformation of the circular holes in relation to their spacing from the bend in the two-point bending of the sheet on the bend press
 Piterka, Miloslav ; Řiháček, Jan (referee) ; Mrňa, Libor (advisor)
The thesis is focused on studying deformation of the circular holes in the limit bending space, depending on the material type, distance from bend, the thickness of material and diameter of hole. After analyzing all necessary technological parameters was bending technology on press brake selected. An experiment for which the tools and press brake Trumpf TruBend 5170 were selected was designed and performed. Samples for the study were designed, bent and measured. The charts have been prepared for practical use in the company from measuring. In addition, simulations were processed in Ansys program and graphs were compiled to compare the main effect of the hole deformations. Two methods were chosen to prevent deformation in limit bending space. Under-cutting method by laser and method of using special Rollbend tool. In the end, economic studies for the Rollbend tool were developed instead of under-cutting hole with grinding.
Detailed record

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