Process of Push Bending Elbows and Its Parameters CAD System

Abstract

The traditional processes of elbows have some shortcomings such as the thickness of the convex side of elbows is less than that of the concave side of elbows. In order to overcome these shortcomings, the process of hot push bending elbows is introduced in this paper. By this process, the even thickness and strength elbows can be produced for modern industrial demands. Four fundamental hypotheses describing the forming characteristic of the elbows are put forward based on the experiment results in elbows forming process. Then, the relation among instantaneous curvature, diameter and thickness of the elbow is investigated, which is the key problem for manufacturing die. Finally, the process parameters CAD system of heated pushing elbows is developed. This CAD system has brought great economic and social benefit in industrial applications.