Effects Of Mandrel Shank Positions And The Gap Values Between The Mandrel Balls And The Tube On The Thinning And The Ovality İn Rotary Draw Bending

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2022-1-01

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Ozcan, Bahadir
Evis, Zafer
ÖZTÜRK, FAHRETTİN

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Tube and tube systems are very critical components to fulfill the design requirement of applications. Especially the bending radius is most important factor in a tube bending process. Therefore, as the bend ratio (bending radius/outer diameter of tube) and the wall thickness of the tube material decrease, the risk of encountering defects such as wrinkles, ovality, wall thinning, and crack increases. Rotary draw bending process is generally preferred for bending tubes with a small bend ratio and thin wall thickness. In this process, tools such as bend die, clamp die, clamp insert, pressure die, wiper die, and mandrel are used. For the minimum bending radius value can be accomplished considering the processes parameters such as material properties and geometry of tube, die geometries, position and geometry of mandrel, wiper die angle, pressure value of pressure die and bending speed. Bending of different tube materials by trial and error method results manufacturing cost and time increases. In this study, effects of mandrel shank positions and the gap values between the mandrel balls and the tube on the thinning and the ovality are investigated by commercially available PAM-STAMP program for AA6061-W condition material. The results are compared with available results in the literature.

Subject Keywords

Rotary draw bending, tube bending, tube bending radius, tube bending ratio

URI

https://hdl.handle.net/11511/101863

DOI

https://doi.org/10.37904/metal.2022.4395

Conference Name

31st International Conference on Metallurgy and Materials, METAL 2022

Collections

Department of Engineering Sciences, Conference / Seminar

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Citation Formats

B. Ozcan, Z. Evis, and F. ÖZTÜRK, “Effects Of Mandrel Shank Positions And The Gap Values Between The Mandrel Balls And The Tube On The Thinning And The Ovality İn Rotary Draw Bending,” presented at the 31st International Conference on Metallurgy and Materials, METAL 2022, Brno, Çek Cumhuriyeti, 2022, Accessed: 00, 2023. [Online]. Available: https://hdl.handle.net/11511/101863.