Forming method of cylinder workpiece with transverse inner rib

A technology for solid workpieces and workpieces, which is applied in the field of forming cylindrical workpieces, and can solve problems such as large wall thickness of extrusion cylinders, difficulty in meeting high mechanical properties of large pressure vessels, and difficulty in meeting high mechanical performance requirements.
CN113182474AActive Publication Date: 2021-07-30ZHONGBEI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHONGBEI UNIV
Publication Date
2021-07-30

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Abstract

The invention relates to a forming method of a cylinder workpiece with a transverse inner rib. According to the forming method, the procedures of blanking, upsetting and backward extrusion are adopted, and the forming method is characterized in that the procedures of grooving and overturning, overturning a blank inner rib die and the like are adopted; a male die of the overturning blank inner rib die comprises a male die correcting ring, a male die pressing plate, a connecting rod mechanism, a spring, a pressing rod, a limiting pipe and a pressing ring; and a female die comprises an inner overturning female die body, an inner overturning female die body supporting ring and a lower die plate. The problems that a cylindrical part with a large body and a small opening is extruded, and demolding is difficult are solved, a female die opening is designed to be a large-arc-shaped fillet, the shearing stress generated when a thick-wall annular rib at the upper end of a backward extrusion cylinder workpiece is overturned is reduced, material breakage during overturning is prevented, and the quality of the outer surface of an extrusion cylinder is improved; and materials are saved, efficiency is high, and the forming method is suitable for batch production.
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Description

technical field

[0001] The invention belongs to an extrusion method for forming a metal material workpiece, in particular to a forming method for a cylindrical workpiece with transverse internal ribs. Background technique

[0002] At present, for cylindrical workpieces with transverse internal ribs at the ends, such as certain types of large pressure vessels (see figure 1 ) manufacturing, the structural characteristics of the workpiece: ①The cylinder is thin-walled (10mm), and the end is thick-walled (width 100, thick 100), the overall thickness is different, and it cannot be stretched and formed by sheet metal; ②Extrusion method can only Forming a thick-walled cylinder with the same inner diameter (110) as the end portion results in a large waste of material.

[0003] Such as figure 1 As shown, for the cylindrical workpiece 1 with transverse internal ribs, the traditional forming process mostly adopts the machining method after extrusion, casting method, and welding metho...

Claims

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