Rotary extrusion forming die for multiple inner annular ribs of cylindrical workpiece

Abstract

The invention discloses a rotary extrusion forming die for multiple inner annular ribs of a cylindrical workpiece. The rotary extrusion forming die comprises a split convex die, an inner shape imitating forming sleeve, a rotating device, a floating device, an upper die assembly connected with the upper die holder and a concave die connected with a lower die holder; the split convex die comprises aleft convex die body and a right convex die body, the opposite side walls of the left convex die body and the right convex die body are slopes, and the inner shape imitating forming sleeve is fixed to the side walls outside the slopes of the left convex die body and the right convex die body; the upper die assembly comprises a double action press perforated cylinder connector, a wedge block and apush-pull device, the wedge block is embedded between the slopes of the left convex die body and the right convex die body, the double action press perforated cylinder connector is connected to the wedge block, and the push-pull device is used for controlling the left convex die body and the right convex die body to slide on the upper die holder left and right; and the rotating device and the floating device are used for driving the concave die to rotate and vertically float on the lower die holder separately. According to the rotary extrusion forming die for the multiple inner annular ribs of the cylindrical workpiece, the inner shape imitating forming sleeve can be quickly replaced according to the shape and the quantity of the formed inner annular ribs, and the cylindrical workpiece with the large height-diameter ratio, the multiple cross section shape varieties and the high inner annular rib and body strength requirement can be formed at a time.

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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