DefinePK

Abstract

In most industries, a pipe is an essential mechanical component to transport fluids. In order to control the fluid flow, a branched pipe is necessary. The following pipe branching methods are typically used: a method using a specially designed pin, butt-welding after cutting a U-shape, and Tee branching. In this paper, we studied effects of the drilling length on the branch pipes, with a drawing method using a conical jig that complements the conventional Tee branching. We used two standard forming jigs (65A and 80A). Pipe forming simulation was conducted in each of the five different drilling lengths. We found that longer punching lengths decrease the load on the forming jig. Areduction in the residual stress distribution was also observed in the branch section at a height of 1.5 mm. However, the height of the branch section was reduced while reducing the drawing material. Therefore, in the selection of the processing parameters, we simultaneously considered the height of the branch section and the residual stress.