Abstract
dc:descriptionThe focus of the analyses undertaken was in reducing wear during the deep drawing of AISI 304. This material, which belongs in the category of austenitic stainless steels, is of particular interest for sheet-metal forming applications. The challenge in sheet-forming this material primarily lies in its high proneness towards adhesion as well as in an abrasive effect caused by high levels of strain hardening. It was revealed that a number of very different approaches are nowadays being adopted in order to reduce the wear arising during the deep-drawing process and to influence the wear mechanisms in such a way that both the tool life and the part surfaces are viable from an economic point of view. The various approaches in current research work limit themselves to optimizing a process-specific parameter without viewing the system as a whole. This has led to a series of different stand-alone solutions. The interactions of these solutions with each other are virtually unknown. Within the framework of the analyses presented here, some of the previously created stand-alone solutions were taken up and some new approaches were followed for the purposes of achieving wear reduction. Assuming that the workpiece material is viewed as constant, it was revealed that the primary influencing parameters are formed by the active surface of the tool, the lubrication and the tool geometry. These three apparently independent optimization approaches were followed independently of each other. To do this, different friction and wear tests were carried out. For the active surface and the geometry of the drawing radius it was possible to elaborate on ideal parameters in a direct way. This was not particularly easy to achieve when analyzing the effect of the lubrication on the wear behavior of the entire system under consideration. It was only with the combination of and thus the interaction between the active surface of the tool and the chosen lubrication that effective optimization measures could be obtained. The concepts derived from this for reducing wear during the deep drawing of AISI 304 were brought together and verified. By superpositioning the individual approaches, an integrated synthesis was derived. The verification of this synthesis, which paves the way for the sustainable and ecologically sound wear reduction of the entire system under consideration, resulted in a fundamental proof of theory. By putting the theory to the test in industrial series production, an effective improvement in tool life as well as in part quality is expected. Taking the presented framework conditions into account, it will thus be possible in future to achieve efficient sheet-metal forming, both from an economic and ecological point of view.
Degree
thesis:*- Grantor dc:publisher
- Shaker
- Year dc:date
- 2007
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Kuwer, Christian-Jürgen
- Contributors dc:contributor
-
- Klocke, Fritz
Subjects
dc:subject × 14Rights
dc:rights- Statement dc:rights
-
- info:eu-repo/semantics/openAccess
- Language dc:language
- ger
Identifiers
dc:identifier.*- OAI identifier oai:identifier
- oai:publications.rwth-aachen.de:62427