Numerická simulace procesu ořezávání hlav šroubů

Numerical simulation of the bolt head trimming process

článek ve sborníku ve WoS nebo Scopus

en

An important phase of the bolt production is a bolt head trimming. It is a very fast, complicated process including material failure. For this reasons explicit solver LS-Dyna was used. In the fist part of this paper the ability of LS-Dyna material models to describe the ductile fracture of metals was investigated both with Lagrange and ALE behaviour of the mesh. The results of this testing phase were used to optimize the model of the bolt head trimming. Three geometrical versions were solved and the results were compared with a help of the cutting work and the contact force.

Jednou z důležitých operací při výrobě šroubů na postupových automatech je ostřižení napěchované hlavy šroubu šestihrannou ořezávací matricí. Kvalitu střižné plochy jakož i celkovou životnost nástroje ovlivňuje především střižná hrana. Od výrobce přišel požadavek zodpovědět, jak ovlivňuje poloměr zaoblení průběh a efektivitu celé operace a zda má vliv na životnost nástroje. Těmto problémům se věnován předkládaný příspěvek.

An important phase of the bolt production is a bolt head trimming. It is a very fast, complicated process including material failure. For this reasons explicit solver LS-Dyna was used. In the fist part of this paper the ability of LS-Dyna material models to describe the ductile fracture of metals was investigated both with Lagrange and ALE behaviour of the mesh. The results of this testing phase were used to optimize the model of the bolt head trimming. Three geometrical versions were solved and the results were compared with a help of the cutting work and the contact force.

MKP, řezání

FEM, cutting

2005

09.05.2005

Ústav termomechaniky AV ČR

Svratka

80-85918-93-5

Engineering Mechanics 2005

9