Semi tubular rivet press11/8/2023 ![]() Therefore, for these joining tasks, mechanical joining methods are increasingly being used. However, conventional thermal joining technologies are reaching their limits due to the use of combining different materials and metallurgical incompatibilities with a focus on process robustness. In particular, the use of multi-material design allows weight to be saved by adapting the structure to the application of load. Here, the strategy is to pursue both the development of new drive concepts and the use of lightweight designs in car body. The limitation of natural resources and far-reaching changes in climate policy to reduce CO 2 lead to the application of different strategies in order to achieve the climate targets. However, a negative influence on the joint load-bearing capacity could be excluded. In addition, the use of die-sided sheets requires a large deformation of the rivet head protrusion, which leads to an increase in stress and, as a result, to damage if the rivet head. Especially in the case of high-strength materials arranged on the die side, the interlock formation is low. However, the maximum forces achieved are higher than those of conventional joints. In some cases the joint fails prematurely, which is why lower energy absorptions are obtained. ![]() The load-bearing capacities of the joints are comparable to those of conventionally joined joints. It turned out that all the joints examined could be manufactured according to the defined standards. The joints are investigated both experimentally on the basis of joint formation and load-bearing capacity tests as well as by means of numerical simulation. The multi-range capability of the rivets is achieved by forming the rivet head onto the respective thickness of the joining part combination without creating a tooling set-up effort. In this process, a modified tool actuator technology is combined with multi-range capable auxiliary joining parts. Using a versatile self-piercing riveting process, multi-material structures are joined in this paper. For this reason, a large number of specialised joining processes have been developed to expand the range of applications. However, the currently rigid tooling systems cannot react to changing boundary conditions, such as changed sheet thicknesses or strength. The reasons for this are the variety of joining possibilities as well as high load-bearing capacities. Due to the increasing use of multi-material constructions and the resulting material incompatibilities, mechanical joining technologies are gaining in importance.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |