Vacuum thermal creep type forming method of titanium alloy skin and titanium alloy skin

A technology of titanium alloy and vacuum heating, which is applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems that cannot meet the brazing requirements of titanium alloy honeycomb wallboard, the performance of the base material is reduced, and the precision of the shape is low. Meet structural brazing requirements, small residual stress, and good surface quality

Active Publication Date: 2019-01-15
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology

[0003] Due to the thin skin of the titanium alloy honeycomb panel structure, generally less than 1.0mm, the temperature of the traditional thermoforming is high, the skin has rebound, the surface accuracy is low, and there are also problems such as high temperature oxidation and hydrogen absorption, which lead to the Performance decline, unable to meet the brazing requirements of titanium alloy honeycomb wall panels

Method used

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  • Vacuum thermal creep type forming method of titanium alloy skin and titanium alloy skin
  • Vacuum thermal creep type forming method of titanium alloy skin and titanium alloy skin
  • Vacuum thermal creep type forming method of titanium alloy skin and titanium alloy skin

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] A vacuum thermal creep forming method of a titanium alloy skin of the present invention comprises the following steps,

[0029] 1) Clamp and position the titanium alloy skin to be formed, such as TC4, TC1, TA18 or TA15, with a thickness of 0.5-2.0mm, between the matching upper and lower molds; figure 1 As shown, at the same time, a solder resist is provided on the surfaces of the upper mold and the lower mold, and the particle size of the solder resist is not greater than 19 μm, such as 13 μm. The solder resist is mainly to prevent the skin from sticking to the mold during the forming process. The solder resist is generally in the form of powder or paste, without volatile gas,...

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Abstract

The invention discloses a vacuum thermal creep type forming method of titanium alloy skin. The vacuum thermal creep type forming method comprises the following steps: 1) a to-be-formed titanium alloymask is positioned between an upper mold and a lower mold which are matched; 2) the skin and the mold are heated in a vacuum environment, the forming temperature is 700 DEG-900 DEG C, and after the temperature is maintained for a preset time, the skin is cooled with a furnace and then discharged into the furnace; and 3) the mold is disassembled, and forming of the titanium alloy skin is completed.Due to the fact that the integral vacuum heating is adopted, the creep deformation of the titanium alloy skin is realized by the gravity of the mold, the furnace discharge temperature is low, the skin is cooled to be below 150 DEG C along with the furnace, the rebound amount of the skin is small after forming, the residual stress is small, and the size precision is high.

Description

technical field [0001] The invention relates to the technical field of aviation manufacturing, in particular to a vacuum thermal creep forming method of a titanium alloy skin and the titanium alloy skin. Background technique [0002] Titanium alloy honeycomb panel structure has excellent characteristics such as light weight, high specific strength and specific stiffness, heat insulation, noise reduction and noise reduction, etc. It has been widely used in the aerospace field, such as AN-70 aircraft fireproof partition wall, F-15 engine cover , F-22 engine hatch, etc. The titanium alloy honeycomb panel structure is generally connected by brazing. To ensure the welding rate of the overall structure, it is necessary to ensure that the bonding gap between the skin and the honeycomb core, and between the skin and the skin is less than 0.1mm, and The entire welding surface must not have macroscopic defects such as oxidation and pits. [0003] Due to the thin skin of the titanium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/00B21D39/00B21D37/16B21D37/10
CPCB21C37/00B21D37/10B21D37/16B21D39/00
Inventor 岳喜山高兴强李辉佀好学潘鹏
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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