Deformation during Continuous Forming of Longitudinal Welded Pipes.

Autor: Samusev, S. V., Kondrushin, A. V., Fadeev, V. A.
Zdroj: Steel in Translation; Jan2022, Vol. 52 Issue 1, p39-44, 6p
Abstrakt: One of the most effective research techniques for studying any process is its physical modeling, during which it is possible to verify the data obtained earlier. The Metal Forming Laboratory of MISIS has an electric pipe-welded rig TESA 30–50 for studying continuous forming of longitudinal welded pipes of small and medium diameters. The zone of continuous pipe billet deformation is considered on the example of the first two stands of the pipe forming mill with the pass design of 50 × 1.5 mm. Based on the parameter calculations of real roll pass design, a scheme of contact interaction of the pipe billet with the first and second roll pass design is developed and sections of the deformation zone are determined along with their sizes. By analyzing the conditions of contact interaction of the pipe billet with roll pass designs, the parameters of the pipe billet in contact with the rolls of the first design are determined in seven sections with allowance for the continuous deformation in the mill forming line. Considering the data obtained, the calculation of longitudinal deformations for the edge and bottom of the pipe billet is carried out. The analysis of the results shows that the maximum longitudinal deformation occurred in the edge of the pipe billet in section B–B and is equal to 1.04%, and along the bottom of the pipe billet—0.92%. There is a coordinate grid applied to the pipe billet using a laser engraver. During the forming, the deviation of the trajectory of the pipe billet bottom from the horizontal axis is recorded, and the dimensions of the forming sections are determined. Comparison of theoretical and experimental values shows that the discrepancy between them does not exceed 7%. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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