Rotating extrusion molding method of multi-inner ring ribs of cylindrical part

Abstract

The invention discloses a rotating extrusion molding method of multi-inner ring ribs of a cylindrical part, and relates to a rotating extrusion molding die of the multi-inner ring ribs of the cylindrical part. The rotating extrusion molding die comprises a fission convex die, an inner-imitation forming molding sleeve, a rotating device, a floating device, an upper die assembly and a concave die; the fission convex die comprises a left convex die and a right convex die, and the upper die assembly comprises a double-acting press machine perforated cylinder joint, a wedge block and a push-and-pull device; after blanking, preparation of a cylinder body or a tube blank and molding preparation are carried out, the concave die drives the blank to rotate, the fission convex die moves down into thecylinder body, the wedge block moves down to separate the left convex die and the right convex die, the left convex die and the right convex die are moved by the push-and-pull device, and the inner-imitation forming molding sleeve extrudes the side wall of the cylinder body, after the extrusion molding is carried out, the wedge block moves up, the fission convex die moves up, and demolding of a workpiece is carried out. According to the rotating extrusion molding method of the multi-inner ring ribs of the cylindrical part, the inner-imitation forming molding sleeve can be quickly replaced according to the shapes and the number of the molded inner ring ribs, and cylindrical workpieces with a large height-diameter ratio, various cross-section shapes and high-strength requirements of the inner ring ribs and the cylinder body can be once-molded.

Description

technical field [0001] The invention discloses metal rotary extrusion forming technology, and specifically belongs to the technical field of forming hollow parts with multiple inner ring ribs in light alloy strips. Background technique [0002] Lightweight has become an important symbol to measure the country's comprehensive scientific and technological level, and it is the most urgent need to further improve performance and reduce energy consumption in industries such as transportation, weaponry and aerospace. Lightweight is not only reflected in the material (such as titanium, magnesium, aluminum), but also in the structure. In order to improve the bearing capacity, the light alloy thin-walled cylinder generally has multiple inner ring rib structures. At present, the existing technology is difficult to break through the integral forming of lightweight and complex components coupled with the structural complexity of multiple inner ring ribs and the difficult deformation of ...

AI Technical Summary

Problems solved by technology

However, the use of warm forming also has problems such as the inability to rotate and extrude the cold metal, and the stress is relatively large. The punch is in a state of vertical cantilever beam stress, and the punch may bend when the stress is large, resulting in deflection and other problems.

In traditional plastic forming, the inner ring rib of the cylindrical part is in the blind area of ​​the extrusion direction, and the transverse inner ring rib cannot be formed by forward extrusion and reverse extrusion. The traditional method is: first extrude the thick-walled cylindrical part, and then turn the groove. The last remaining shape is the inner ring rib. The characteristics of the traditional inner ring rib forming method: 1) The wall thickness of the cylinder must be greater than the height of the inner ring rib, which wastes materials; 2) All streamlines are cut off to reduce the distance between the inner ring rib and the body wall Connection strength; 3) Long production process

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