Axial-radial flow dividing extrusion forming method for thin-walled wide-flange vertical bar tubular member

Abstract

The invention discloses an axial-radial flow dividing extrusion forming method for a thin-walled wide-flange vertical bar tubular member. The axial-radial flow dividing extrusion forming method comprises the following steps that 1. blank blanking is carried out; 2, homogenizing heat treatment is carried out to prepare a circular column preforming member; 3, an axial-radial flow dividing extrusionforming die for the thin-walled wide-flange vertical bar tubular member is used for conducting partial radial extrusion on the preforming member, a bottom flange and partial longitudinal ribs are formed, and a first semi-finished product is manufactured; 4, axial-radial flow dividing extrusion is carried out, a thin wall, the wide flange and outer longitudinal ribs thereof are formed at the same time through one-time die loading, and a second semi-finished product is manufactured; and 5, heat treatment and outer surface machining are carried out, and the final tubular member is manufactured. The thin wall, the wide flange and the outer longitudinal ribs thereof can be formed at the same time through one-time die loading by means of the axial-radial flow dividing extrusion forming method, the manufacturing process is shortened, the labor intensity is reduced, and the axial-radial flow dividing extrusion forming method has the advantages that the manufacturing process is short, the precision is high, and the low cost is good.

Description

technical field [0001] The invention relates to the technical field of precise extrusion forming, in particular to an axial-radial split extrusion forming method for a thin-walled wide-flange vertical rib cylindrical part. Background technique [0002] Thin-walled and wide-flange cylindrical members with longitudinal ribs are widely used in aerospace, transportation, equipment manufacturing and other fields. 1. The strength plays a decisive role in the performance of the equipment. The structural characteristics of this type of component are: the wall of the cylinder is thin, it has a wide flange, the wall thickness difference of its section is large, the wall thickness of the flange is greater than the wall thickness of the cylinder, and there are many longitudinal ribs on the outer surface, and its mechanical High performance and dimensional accuracy are required. [0003] At present, the main manufacturing process of such components is welding and forming after steel pl...

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Problems solved by technology

[0003] At present, the main manufacturing process of such components is welding and forming after steel plate machining, and its defects are: low product strength, poor impact resistance, fatigue cracks easily appear in the welded part of the material, poor mechanical properties, and low overall life. And the overall mass is relatively large, which cannot meet the lightweight requirements of equipment

However, the conventional extrusion molding method requires multiple mold loading and demolding to form, and the process of conventional extrusion adopting the process of flaring and then turning over is likely to cause folding defects in the longitudinal ribs on the outer side of the cylinder.

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