To apply aluminum extrusion forms as automobile structural parts, it will be necessary to engage in two-dimensional and three-dimensional bending processes. The only two processes enabling complicated three-dimensional flexural bending are stretch bending and push-through bending. In this development project, a push-through bending processing system has been established that features a high level of accuracy and which is fully competitive with other systems, regarding the bent frame structural members which serve as the key parts of aluminum hybrid bodies and which capitalize on the advantages of aluminum to the fullest extent. This contributes immensely to the weight reduction of automobiles. The newly developed system is comprised of three technologies, based on the development of a massive precision bending machine, the development of a high-functional bending CAM system, and characteristics stabilization of the aluminum extruded materials. It became possible to considerably decrease the precision flexural error and the precision disparity. As a result, the flexural accuracy disparity for the side rails of the roof, which are the most difficult to process, has been decreased to less than one-fifth compared with conventional push-through bending techniques. Further, the development of the high-functional three-dimensional bending CAM system considerably decreases the number of NC program preparation processes and the volume of test materials necessary for preparing these NC programs.
Development of precision flexural machining system for aluminum automobile frames
New Technology Japan ; 28 , 12 ; 11-17
2001
7 Seiten, 14 Bilder
Aufsatz (Zeitschrift)
Englisch
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