Technology Analysis of Hot Pushing Pipe Bending and Horn Mandrel Design

摘要

The forming principle and technological process of hot pushing pipe bending were introduced in this paper. Design of horn mandrel which affecting the elbow size and shape was studied. The push bending forming depends on the geometrical shape of horn mandrel. Two main design methods of horn mandrel were given and improvements have been made. The improved horn mandrel can push out high quality elbow pipe, which lay a good foundation for more accurate mandrel design and more rational process formulation.