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Analysis of tools wearing in of Al-Si coated steel strips perforating process to be used as elements of exhaust systems
Języki publikacji
Abstrakty
Przeprowadzono analizę geometrii stempli nowych oraz analizę składu chemicznego i geometrii stempli zużytych. Przedstawiono wyniki badań mikrogeometrii powierzchni bocznej i czołowej stempli. Zamieszczono analizę geometrii i składu chemicznego powierzchni otworów i krążków po wykrawaniu.
The more tools are worn out, the bigger dimensional deviations and surface roughness are. Also, defects such as scratches and pulls appear. Local material losses on working tool surfaces appear and cutting edges become rounder which leads to changes in tool contour and angles. Rounding increases the real size of the space between tools and cutting force, consequently increasing the danger of a break-down. This makes re-tooling of machines, tool grinding and disassembly and reassembly of punching tools necessary, thus increasing production costs. Also, the properties of punching tools' surface have a crucial influence on their life. Hence, the ways of improving their surface layers in order to increase their wear resistance and life are being sought. The wear of tools in punching processes can be measured with the changes in the cutting edge shape, force and the quality of the product received. The aim of the paper is to analyse the tool wear, evaluation of perforation quality and identification of the coating behaviour during punching steel strips with Al-Si coating which are designed to manufacture pipes for exhaust system parts. Punches, punching plates and strips after perforation process have been tested. New punches contours as well as chemical composition and contours of worn punches have been analysed. The results of side and front surface micro-contour tests have been presented. The analysis of contour and chemical composition of holes and rollers after punching has been included. Rough estimates of tools' life are the base for planning their number necessary to manufacture a specific amount of products.
Słowa kluczowe
Wydawca
Czasopismo
Rocznik
Tom
Strony
71--78
Opis fizyczny
Bibliogr. 2 poz., rys., wykr.
Twórcy
autor
autor
autor
autor
- Akademia Górniczo-Hutnicza, Wydział Metali Nieżelaznych, Kraków
Bibliografia
- 1. Polański Z.: Wykrawanie. Podstawy teoretyczne i metody rozwojowe. Warszawa, WNT 1978.
- 2. Technologie Buczek S.A. Instrukcja czynnościowa: Obsługa i eksploatacja prasy nr I SMV do perforowania taśm stalowych.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-AGH2-0004-0072