Strained state simulation of cylindrical billet of roofing mounting hardware at internal thread extrusion
A. K. Kralin
Donbas National Academy of Civil Engineering and Architecture
Annotation: The paper deals with the problem of manufacturing of fastening elements used at copper roofing erection. The manufacture of electroplating compatible fastening elements enables to extend the service life of not only fastening elements but the product itself. The basic methods of the manufacturing of fastening elements with thread profile used not only in civil engineering but also in the automotive industry and roadbuilding machines production have been presented in the paper. The advantages and disadvantages of the given methods have been considered and their brief features have been also given. The process of unilateral extrusion of non-ferrous metal billets has been considered and the form process affect of a thread cutting tool on a billet has been shown. The analysis of strained state of a billet of the roofing mounting hardware during extrusion at asymmetric strain has been undergone. The task solution has been performed in the cylindrical coordinate system. During the analysis, the billet has been conventionally divided into the thread and ring regions in which axial and radial metal flow rate, material deformation rate and strain rate intensity have been determined. The equations of the range and tangent rates of deformation have been obtained. The parameters dependences of the state of strain of the billet in the ring and thread regions have been presented. The conclusions enable to determine the basic statements of the engineering approach to the analysis of the state of strain of metal cylindrical billet at manufacturing fastening elements for roofing erection have been presented in the paper.
Keywords: plastic strain, copper, brass, hardening, internal thread, unilateral extrusion.
Pages: 185-192.
Link for citation: Kralin, A. K. Strained state simulation of cylindrical billet of roofing mounting hardware at internal thread extrusion. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2010. – Vol. 6, N4. – Р. 185-192. – URL: https://donnasa.ru/publish_house/journals/spgs/2010-4/01_kralin.pdf (date of access: 16.09.2024). (in Russian)
Vol. 6, N4 (2010)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture