一、无缝圆管挤压模具设计这类模具主要是指借助于穿孔针用空心铸锭或实心铸锭穿孔来挤压管材用的模子和针尖。由于穿孔针必须置于挤压机的中心线上,所以,只能进行单孔挤压,因而模孔的理论重心也应置于挤压机中心线上。 1.管材模尺寸的设计管材模一般采用锥形模(见图1所示)进行挤压。实践证明,锥形模的锥角在25～ First, the seamless pipe extrusion die design This type of mold is mainly refers to the use of perforated needle hollow ingot or solid ingot perforation to squeeze the pipe with the mold and needle. Since the perforated pin must be placed on the centerline of the extruder, only single-hole extrusion is possible, so the theoretical center of gravity of the die hole should also be placed on the centerline of the extruder. 1. The design of pipe die size Pipe die generally use conical die (see Figure 1) for extrusion. Practice has proved that taper cone taper at 25 ~