Investigation and Experimental of ALFORM steel pipe Using Roller bending Forming process

There are different methods for producing pipes and cylindrical sections, each of which has its own advantages and disadvantages. In this research, a new method for press bending of high strength steel sheets has been investigated. The amount of spring return is one of the main parameters that has been investigated in this research by an experimental method. For this purpose, a cylinder with a diameter of ۱۰۰ mm made of ALFORM material has been formed in three steps using a steel mold specially made for this process. In another step of this article, ST۳۷ structural steel was used and examined, and the research process was repeated and its results were compared and examined. As expected, spring rebound in high strength steel was much higher than structural steel. From the examination of the practical results, it was concluded that the spring return rate of ALFORM in this method is about ۵% of the diameter and this number is equal to ۱% in ST۳۷ steel. In addition, it was found that the parameter of the place of placing the sheet on the mold and the distance from the edge of the sheet to the center of the matrix is one of the issues that in the results extracted in the research, including the distance between the two edges of the part from each other after the end of the first and second steps, they reached the shape Uniform circular geometry is very effective at the end of the third stage.

Keywords:

Press Bending , Spring Return , Bending Mold , Experimental , ALFORM