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The Research on the Forming Technology of Large-sized Diameter Welded Pipe

Author: SunDeYang
Tutor: YeJinZuo
School: Tianjin University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Welded pipe Molding process Pass Virtual roller type Numerical Simulation
CLC: TG457.6
Type: Master's thesis
Year: 2010
Downloads: 66
Quote: 0
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Abstract


Straight seam welded pipe forming process is complex , theoretically belongs to plastic large deformation and contact nonlinear coupled problem , the theoretical and experimental research is far behind in engineering practice . In engineering practice , longitudinally welded pipes pass , roll , and the design of the molding process still experience design , experience design approach main disadvantage is that the design process and roll reasonableness must be tested by the production practice , the high cost , long cycle , is no longer suitable for the needs of the development of the market economy . Currently longitudinally welded pipes to the development of large-caliber and high-strength direction , the continuous roll- forming process and the row roll forming process is no longer suited to the production of large-diameter high-strength steel . Complete the molding process research welded pipe , welded pipe forming process and die design from the experience design approach to the transformation and development of the numerical simulation method of continuous roll molding , Roll Forming advantages mixed molding process has very important significance . According pass map, preliminary design virtual roller type . And application of large-scale multi-physics finite element software ANSYS / LS -DYNA simulation ( ? ) 30 × 3mm ( ? ) 219 × 7mm ( ? ) 610 × 16mm welded pipe forming process , calculation and analysis of the tube from the initial band the steel state to the final molding process, the tube is formed to obtain the billets in the complexity of the molding process , the stress and strain distribution . The proposed the roller design method based on the results of the numerical simulation , roll forming for the rational design of welded pipe mill roller type basis .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding process > Welding of a variety of metal materials and components > Pipe welding
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