Comparison of semifinished product influence on surface degradation of forging rolls
2018
Kusmierczak, S., Jan Evangelista Purkyne Univ. in Ústí nad Labem (Czech Republic) | Naprstkova, N., Jan Evangelista Purkyne Univ. in Ústí nad Labem (Czech Republic)
The production of seam tubes is a multi-stage technological process. In the case of exhaust systems, it is mainly a combination of welding and forming technologies. The final quality and state of the pipes generally depend on the chemical composition, microstructure, mechanical and technological properties of the tube blanks. Another factor that is often forgotten in technical and manufacturing practice is the quality, performance and state of tools combined with external factors in the production process. The interplay of all factors, i.e. internal and external, gives rise to a product of the desired quality and characteristics. The technical practice uses a constant set of working conditions for each production technology, often without regard to the state of the sheet metal, the state of the tools does not count with more significant changes and unify the process. While unification is a frequent requirement in the technical sphere, the theoretical assumptions do not always coincide with reality. The article will discuss how choosing the right choice for semi-forging rollers can affect the degradation of the surfaces of these rollers and thus the output quality of the exhaust systems. In this article it is shown that in this analysed case the quality and durability of forging roller degradation clearly affect the internal factors such as different chemical compositions and the microstructure of semi-finished products. As external factors that have affected the roller life and quality, tool grinding and technology can also be included, which depend on a combination of forces, thermal and corrosive effects acting on the work tool surface.
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