Estimation of Cross Sectional Distortion in Bending of Rectangular Steel Tubes
Moradi Chargari, Amirali (2019)
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Lataukset:
Moradi Chargari, Amirali
2019
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201905088293
https://urn.fi/URN:NBN:fi:amk-201905088293
Tiivistelmä
The current study was commissioned by steel manufacturing company SSAB. Tubes with a rectangular section have the advantages of light weight, high strength, save of material and ease of installation, and they are the key components in frame structures, so they have a wide range of applications.
Wherever tubes are used, an accurate bend angle and an uniform cross section are often desired. As a result, a number of bending processes have been developed for various bending purposes. Rotary draw bending and roll bending are among the most common processes in tube bending. Tubes with a rectangular cross section can easily produce cross-sectional distortion in the bending process, which affects the forming accuracy and appearance of the final product. Factors such as material properties, bending technique and set up as well as geometrical parameters can affect the final quality of the tube.
Many scientists have studied the sectional distortion of tubes with a rectangular cross section in the bending process. They have investigated the effect of different parameters through experimental and mathematical models and tried to eliminate or reduce undesired deformation to optimize the bending result.
In this project the effect of steel grade was examined. Moreover a comparison were made between the distortion on cross section using different mandrel in rotary draw bending (RDB) and roll bending process in two bend angle by utilizing optical measuring devices. Finally finite element analysis was implemented to estimate the distortion and to be compared to the experimental results.
Wherever tubes are used, an accurate bend angle and an uniform cross section are often desired. As a result, a number of bending processes have been developed for various bending purposes. Rotary draw bending and roll bending are among the most common processes in tube bending. Tubes with a rectangular cross section can easily produce cross-sectional distortion in the bending process, which affects the forming accuracy and appearance of the final product. Factors such as material properties, bending technique and set up as well as geometrical parameters can affect the final quality of the tube.
Many scientists have studied the sectional distortion of tubes with a rectangular cross section in the bending process. They have investigated the effect of different parameters through experimental and mathematical models and tried to eliminate or reduce undesired deformation to optimize the bending result.
In this project the effect of steel grade was examined. Moreover a comparison were made between the distortion on cross section using different mandrel in rotary draw bending (RDB) and roll bending process in two bend angle by utilizing optical measuring devices. Finally finite element analysis was implemented to estimate the distortion and to be compared to the experimental results.