Force Interaction of Technological Tool and Elastic-Plastic Link at Large Diameter Tubes Preliminary Forming

Abstract:

The sustainability of the manufacturing process and quality improvement of the longitudinal electric-welded large diameter tubes, produced from the U-shaped workpiece, is determined based on a science-based approach to the parameters selection and the preliminary press forming technological tool settings. For this purpose we developed a software system that allows interactively performing multiple calculations of the kinematics and press equipment energy-power characteristics in the interaction of mutually movable links of the supporting rocker mechanism with a punch through the forming workpiece, presented in the form of elastic-plastic link. As a result of the study of forming workpiece stress-strain state and the mechanism force analysis, dependence of the equipment maximum loads in function of the geometry, size and setting instrument parameters, the forming tube size and material is determined. Physical modelling of the press forming process was performed to analyze the influence of these factors on the maximum load value. The forces perceived oscillating rocker stand and videogram of the process were recorded during physical modelling. Experimental data matches with the results of the developed software calculation with a precision of 12%. An original modular tool with variable geometry is proposed. It is shown that the use of the two-radius punch construction allows to reduce the maximum loads magnitude during preliminary forming by 30% and, therefore, to reduce the load of the whole technological tool. In addition, the possibilities to receive U-shaped products with high precision and predetermined shape parameters are expanded.

• Periodical: Solid State Phenomena (Volume 265)
• Pages: 975-980
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.265.975
• Online since: September 2017
• Authors: Yu.B. Chechulin*, Yu.V. Pesin, N.Yu. Boklag
• Keywords: Large Diameter Tubes Forming, Loads during Forming, Mathematical Modelling, Software System

References

[1] V.N. Danchenko, A.P. Kolikov, B.A. Romantcev, S.V. Samusev, The technology of pipe production, M-Intermet Engineering, (2002).

[2] Advertising project SMS MEER Machines and Plants for the Manufacture of Welded Large-Diameter Pipes, Metallurgy Tube Copper Plants, (1998).

[3] A.A. Fedorov, Y.B. Chechulin, N.Y. Boklag, Punch preformation of pipe, RU patent 124600.

[4] Y.B. Chechulin, N.Y. Pesin, V.M. Dushkin, Calculating tool geometry to control the molding of large diameter pipes, Blank production in mechanical engineering. 10 (2011) 34-37.

[5] Y.B. Chechulin, N.Y. Boklag, Y. Pesin, A.M. Zolotov, The kinematics of the press molding mechanism of arch products for mutually movable tools, Steel. 4 (2013) 55-57.

[6] Y.B. Chechulin, N.Y. Boklag, Y. Pesin, A.M. Zolotov, Analysis of stress-strain state and improvement of the molding tool of large diameter pipes, Proceedings of the III International Scientific-Technical Conference Modern metal materials and technologies,. (2013).

[7] Y.V. Pesin, Y.B. Chechulin, N.Y. Boklag, V.M. Ziomkovsky, The equations of the kinematics of the provisions of the instrument with controlled geometry for forming large-diameter pipes, Coll. scientific papers of the International scientific and practical conference Development of mechanical engineering, transport, technological machines and equipment in a market economy., Yekaterinburg. (2014).

[8] M. Lutz, Learning Python, O'Reilly Media, (2009).