Superplastic forming/diffusion bonding forming method for heat-resistant titanium alloy envelope

A technology of superplastic forming and diffusion bonding, which is applied in the field of metal plastic processing to achieve high overall performance, improved welding rate, and good overall performance

Active Publication Date: 2017-01-04
北京普惠三航科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most common application of titanium alloy superplastic forming / diffusion bonding technology is to form some basins and ball parts with simple shapes, and the use of superplastic forming / diffusion bonding to form complex two-layer structure parts is rarely reported.

Method used

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  • Superplastic forming/diffusion bonding forming method for heat-resistant titanium alloy envelope
  • Superplastic forming/diffusion bonding forming method for heat-resistant titanium alloy envelope
  • Superplastic forming/diffusion bonding forming method for heat-resistant titanium alloy envelope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A superplastic forming / diffusion bonding forming method of a titanium alloy heat-resistant skin, comprising the following steps:

[0051] (1) Mold making

[0052] In the process of superplastic forming / diffusion connection of heat-resistant skin, molds are needed to control the shape and size of the workpiece. The mold includes an upper mold and a lower mold. The cavities of the upper mold and the lower mold are designed according to the outline of the workpiece. Make the cavity surface of the upper mold and the lower mold consistent with the appearance of the heat-resistant skin, and process the positioning holes, temperature measuring holes, hoisting holes, ventilation grooves, upper mold and lower mold upper mold respectively on the upper mold and the lower mold Corresponding to the position of the upper mold, and set a number of vent holes on the cavity surface of the upper mold;

[0053] (2) Blank processing

[0054] Both the inner and outer skins are made of 0.8...

Embodiment 2

[0070] A superplastic forming / diffusion bonding forming method of a titanium alloy heat-resistant skin, comprising the following steps:

[0071] (1) Mold making

[0072] In the process of superplastic forming / diffusion connection of heat-resistant skin, molds are needed to control the shape and size of the workpiece. The mold includes an upper mold and a lower mold. The cavities of the upper mold and the lower mold are designed according to the outline of the workpiece. Make the cavity surface of the upper mold and the lower mold consistent with the appearance of the heat-resistant skin, and process the positioning holes, temperature measuring holes, hoisting holes, ventilation grooves, upper mold and lower mold upper mold respectively on the upper mold and the lower mold Corresponding to the position of the upper mold, and set a number of vent holes on the cavity surface of the upper mold;

[0073] (2) Blank processing

[0074] Both the inner and outer skins are made of 0.8...

Embodiment 3

[0089] A superplastic forming / diffusion bonding forming method of a titanium alloy heat-resistant skin, comprising the following steps:

[0090] (1) Mold making

[0091] In the process of superplastic forming / diffusion connection of heat-resistant skin, molds are needed to control the shape and size of the workpiece. The mold includes an upper mold and a lower mold. The cavities of the upper mold and the lower mold are designed according to the outline of the workpiece. Make the cavity surface of the upper mold and the lower mold consistent with the appearance of the heat-resistant skin, and process the positioning holes, temperature measuring holes, hoisting holes, ventilation grooves, upper mold and lower mold upper mold respectively on the upper mold and the lower mold Corresponding to the position of the upper mold, and set a number of vent holes on the cavity surface of the upper mold;

[0092] (2) Blank processing

[0093] Both the inner and outer skins are made of 0.8...

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Abstract

The invention belongs to the technical field of metal plastic processing, and aims at providing a superplastic forming/diffusion bonding forming method for a heat-resistant titanium alloy envelope with high material utilization ratio, high dimension control precision and high product performance. As a mould is adopted to control the appearance and dimension of a workpiece, the forming of a titanium alloy workpiece provided with a complex profile is completed, the production process of the heat-resistant envelope workpiece is shortened, and production cost is lowered; as the process of diffusion bonding followed by superplastic forming is adopted, the diffusion bonding is realized at the contact part of an inner envelope and an outer envelope, and the superplastic forming is realized at a separated part, the once-formed heat-resistant envelope with the complex profile and a hollow structure has the advantages of greatly improved structural integrity of a component, enhanced specific strength and specific stiffness of the component and increased welding rate of the diffusion bonding; the processed workpiece has the advantages of high dimension accuracy, high integral performance, light weight and the like; and the method disclosed by the invention has the advantages of shortened processing period, high material utilization ratio and lowered production cost.

Description

technical field [0001] The invention belongs to the technical field of metal plastic processing, in particular to a superplastic forming / diffusion bonding forming method of a titanium alloy heat-resistant skin. Background technique [0002] Superplastic forming / diffusion bonding (SPF / DB) technology has developed rapidly since the 1970s. It utilizes the excellent elongation and good diffusion properties of metal materials with specific microstructures in the high temperature range. , by applying appropriate pressure to make the bonded part of the material undergo diffusion connection, and the separated part undergoes superplastic forming, thereby forming an overall hollow structure. This technology can be used to form complex overall structures at one time. Compared with traditional riveting and welding processes, it can effectively improve material utilization, shorten processing cycles, and reduce manufacturing costs. Therefore, titanium alloy SPF / DB technology has become ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23K31/02B21D39/03
CPCB21D39/031B23K31/02B23P15/00
Inventor 雷鹍刘新芹商烁
Owner 北京普惠三航科技有限公司
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