Abstract
Divide the fixed-circle’ anti-extrusion into two parts: the anti-extrusion ring part and the cylindrical part under the punch, derive the extrusion formula of anti-extrusion with principal stress method, and set all the data of fixed-circle into this formula, calculate the unit extrusion pressure and the pressure during extrusion. The process of the extrusion part can be several steps, including the blank preparation, processing methods, technical requirements and so on. During the design, we should base on the structure and size of the part to analyze. Then decide the machining process. Meanwhile, according to the size and the structural features of the extruded part, select the extrusion die material, and design the anti-extrusion die.
Keyword: Fixed circle; Anti-extrusion; Principal stress method
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