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This study introduces a novel extrusion technology for creating hollow curved pipes. By adjusting the die

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Area of Science:

  • Materials Science and Engineering
  • Manufacturing Processes

Background:

  • Traditional methods for producing curved pipes are often complex and costly.
  • There is a need for more efficient and controllable manufacturing techniques for hollow curved components.

Purpose of the Study:

  • To present an original technology for the direct extrusion of hollow curved pipes.
  • To develop theoretical models for predicting the curvature radius based on extrusion die parameters.
  • To validate the developed technology through experimental testing and numerical simulations.

Main Methods:

  • Developed a novel extrusion die with an eccentric annular calibration gap.
  • Formulated theoretical relationships linking die eccentricity to pipe curvature radius.
  • Fabricated and tested the die using lead pipes (20 mm outer diameter, 18 mm inner diameter).
  • Employed finite element method (FEM) simulations using QForm 3D software for numerical analysis.

Main Results:

  • Experimental measurements of pipe curvature radii closely matched theoretical predictions.
  • Numerical simulations confirmed the correlation between eccentric gap adjustment and curvature control.
  • Demonstrated the feasibility of controlling the curvature radius by altering the die's eccentric gap.

Conclusions:

  • The proposed extrusion technology enables direct manufacturing of hollow curved pipes with controlled curvature.
  • The developed theoretical models accurately predict the curvature radius.
  • The technology offers a viable and controllable method for producing curved pipe extrusions.