Method for manufacturing cylindrical titanium alloy parts with two ends flanged inwards through forced supplementing

Abstract

The invention discloses a method for manufacturing cylindrical titanium alloy parts with two ends flanged inwards through forced supplementing. The method includes determining structure and size of an initial blank and feeding; rolling edges, welding longitudinal seams and correcting; sealing tubing and welding a vent pipe; placing the blank and a superplastic forming die into a superplastic forming machine, heating and assembling the die; injecting inertia high-pressure gas of certain pressure into a closed space of the tubing and keeping pressure; axially and forcefully supplementing the tubing; forming superplastically after supplementing; cooling to discharge the parts and removing allowance. By the method, the cylindrical parts with two ends flanged inwards are realized by equal-thickness plates, the parts are uniform in integral thickness distribution, the blank can be fed and the parts can be taken at the high temperature, continuous production is realized, production efficiency can be greatly improved and production cost is reduced.

Description

technical field [0001] The invention belongs to the field of precision sheet metal processing, and relates to a method for manufacturing a titanium alloy tubular part with both ends flanging inwards with forced feeding, which is suitable for forming flanging tubular parts of various structural types. Background technique [0002] Titanium alloy has excellent performance such as high strength, strong corrosion resistance and good chemical stability, so it is widely used in aerospace, rail transportation, weaponry and other fields. [0003] In the field of aerospace, the requirements for the integration, light weight and manufacturing precision of large-sized parts are also getting higher and higher. However, at room temperature, titanium alloy has a large yield ratio, narrow plastic deformation range, low elastic modulus, and high yield strength. Therefore, during cold forming, the forming force is large and the springback is serious, so it can only be used for forming with a...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for manufacturing titanium alloy tubular parts with inward flanging at both ends with forced feeding, which overcomes the shortcomings of the existing cold forming process, such as difficulty in controlling the shape accuracy and high cost, and effectively solves the problem of superplastic Forming technology has solved the problems of uneven thickness distribution and serious thickness reduction of formed parts. It has realized the use of equal-thickness plates to form cylindrical parts with inner flanging at both ends, and the overall thickness distribution of the parts is relatively uniform. parts, to achieve continuous production, which can greatly improve production efficiency and reduce production costs

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