Abstract: For large-tonnage extruder extrusion cylinder structure design, the pre-stressed steel wire winding subdivided-combined extrusion cylinder has the advantages of light weight, good fatigue resistance, simple and low-cost manufacturing, compared with conventional extrusion cylinder. Try to design a bevel end face structure of steel wire winding subdivided-combined extrusion cylinder, in order to further reduce the weight. Under the action of the massive support principle, the structural steel wire winding layer to core tube’s preloaded ability was markedly enhanced. The geometric parameters for bevel end face of core tube were optimized structure design, getting the method to determine the optimal size of the core tube. It is obtained by numerical simulation that the pre-stressing state or working state of the bevel end face structure and the flat end face structure have the same stress distribution, with the same working pressure, but the smaller outside diameter and the lighter weight for core tube of bevel end face structure then the flat end face structure, and the bevel end face structure has smaller pre-stress required, the usage of steel wire in the winding layer also could also decrease. From these two aspects reduce the cost of the cylinder material and the manufacturing difficulty.

Key words: extrusion cylinder, numerical simulation, pre-stress, subdivided-combined, wire winding