TY - JOUR
TI - Investigation of the effect of pre-deformation shape on cold forming properties in the product material in fastener production
AU - Mermer Murat
AU - Ovali Ismail
JN - Thermal Science
PY - 2023
VL - 27
IS - 4
SP - 3261
EP - 3268
PT - Article
AB - Due to product features such as production quality and high surface quality,  cold forging and cold extrusion methods are widely used in the production of  fasteners. Extrudability plays a key role during the process and is  affected by many process parameters. Die shape characteristics directly  affect cold deformation. In particular, deformation hardening is influenced  by the shape characteristics. The cold extrusion process also significantly  affects mechanical properties. In this study, the effect of die shape  characteristics on the extrudability of 20MnB4 (EN 10263-4) low carbon steel  was investigated. Additionally, finite element analysis was conducted to  optimize extrudability. Radiuses, angular, and radius-angular die shapes  were used in the experimental and finite element analysis. The SIMUFACT  FORMING software was used for finite element analysis. Both experimental  and finite element analysis results showed that die shape significantly  affects the extrudability of steels. Extrudability of steels can be  optimized with the die shape. The highest homogeneous metal flow was  obtained in the sample obtained from the radius-angular die shape. Samples  with an angular die shape showed the lowest extrudability feature. Hardness  and finite element analysis results were consistent.