Global shaping mould and method of titanium alloy air inlet part

Abstract

The invention belongs to the field of sheet metal and hot processing and in particular relates to a global shaping mould and method of a titanium alloy air inlet part. The mould comprises an upper mould and a lower mould, wherein two lifting screws are arranged on each of the upper and lower moulds. The method comprises the following steps: fixing the mould in a hot forming press, heating, putting a round blank after the rounding process into a lower mould cavity, and pre-shaping; performing seal welding on the pre-shaped blank, welding an air inlet pipeline on the end surface of the pre-shaped blank, and opening the mould to take out a formed part as a qualified part meeting the size requirement. The method has the advantages that the process position of the part during global shaping is reasonably determined, so that the mould parting surface is selected at an irregular arc surface tangent line and is an irregular curved surface, the mould cavity depth is reduced, the blank can be stably arranged and formed, and the part can be conveniently taken out after the mould is opened.

Description

Technical field [0001] The invention belongs to the field of sheet metal and thermal processing, and in particular relates to an overall superplastic forming die and method for a large-size heterogeneous complex curved surface titanium alloy thin-walled component, and is suitable for aerospace-use titanium alloy and other metal materials with special-shaped curved surface structure parts Precision forming. Background technique [0002] At present, parts of aerospace products are developing in the direction of lighter weight, complexity and integration, and more and more large-size and complex special-shaped curved thin-walled components are used. The structure of such parts has irregular shapes, such as polygons or special-shaped curved surfaces. Metal materials such as titanium alloys have become ideal structural materials in the cutting-edge field of aerospace due to their low density, high strength, and good heat resistance and corrosion resistance. However, due to the perfor...

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Problems solved by technology

However, due to the performance characteristics of titanium alloys, under ordinary forming conditions, the deformation resistance is large, the elastic modulus is small, and the springback after cold forming is serious, and cold forming processing is very difficult; due to the irregular shape and structure of such parts, it is impossible to use conventional rolls Round, spinning and other process methods to solve; while the ordinary hot stamping method needs to use multiple sets of coupling molds, and can only be formed in sections, and each part needs to be thermally adjusted after welding to ensure dimensional accuracy, and the processing cost is relatively high. high, low efficiency

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