Super-plastic forming die and method thereof

Abstract

The invention discloses a super-plastic forming die and a method thereof. The super-plastic forming die comprises: an upper die, wherein the upper die is provided with a preforming die cavity having a preforming structure; and a lower die, wherein the lower die is concavely provided with a forming die cavity, the forming die cavity corresponds to the preforming die cavity to make the forming die cavity and the preforming die cavity form a closed space during the closing of the lower die and the upper die, the upper die and the lower die are provided with an upper air inlet and a lower air inlet respectively, and the upper air inlet and the lower air inlet are communicated with the closed space. The super-plastic forming die can realize the completion of a super-plastic forming technology, the completion of preforming and final forming in a same die, and instant forming after preforming, has the advantages of good integral formability, good mechanical performances, uniform product thickness, abundant product kind, simple preparation technology, short production period, low rejection rate, and low production cost, is suitable for the industrialized production, and has a wide application space and a very large market popularization value.

Description

Technical field [0001] The invention relates to the field of manufacturing technology, in particular to a superplastic forming mold and method. Background technique [0002] Superplastic molding technology, especially superplastic inflatable molding technology is a relatively new, advanced and immature technology. It has the advantages of good performance, high precision, simple process, convenient operation, etc. It saves energy while ensuring product quality. And equipment. In the prior art, large rounded box parts are formed by concave-convex die forming, hydroforming and other forming methods. However, when forming small rounded parts, there are easy breakage, inconsistent thickness uniformity of the workpiece, and reduced mechanical properties of the workpiece. Problems such as an increase in the rate of forming rejects. [0003] Therefore, the current superplastic molding technology needs further improvement. Summary of the invention [0004] The present invention aims to s...

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Problems solved by technology

In the prior art, the box body parts with large rounded corners are formed by concave-convex die forming, hydroforming and other forming methods, but for example, when forming parts with small rounded corners, there are problems such as easy breakage, inconsistent thickness uniformity of the workpiece, and reduced mechanical properties of the workpiece, resulting in Problems such as increased molding reject rate

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