A hot stamping forming process of titanium alloy multilayer plate

A technology of hot stamping and titanium alloy, which is applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc. It can solve the problems of poor dimensional accuracy of parts, large springback, and the temperature of the sheet metal cannot meet the expected value, etc., and achieve the springback angle Reduce, facilitate large-scale and automated production, and achieve the effect of large-scale and automated production

Active Publication Date: 2021-05-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the traditional hot stamping process, after the sheet is heated, the temperature of the titanium alloy sheet drops rapidly during the transfer from the heating furnace to the stamping die, so that the sheet temperature cannot meet the expected value when the sheet is stamped and formed. Parts have poor dimensional accuracy and large springback

Method used

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  • A hot stamping forming process of titanium alloy multilayer plate
  • A hot stamping forming process of titanium alloy multilayer plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In order to illustrate the advantage of slow temperature drop of the titanium alloy plate during the transfer process under the process of the present invention, the temperature of the titanium alloy plate is measured. The specific implementation is as follows:

[0027] The steel plate is 1.4mm thick 22MnB5 high-strength steel plate, and the titanium alloy plate is 1.7mm thick Ti6Al4V. Cut the steel plate and titanium alloy plate into discs with a diameter of 100mm, and drill a hole with a depth of 50mm and a diameter of 1mm on the titanium alloy plate; then insert the K-type thermocouple into the hole that has been punched on the titanium alloy .

[0028] (1) First, measure the temperature change of the single-layer titanium alloy plate, put the titanium alloy plate into the heating furnace, heat it to 850°C, keep it warm for 5 minutes, take it out and cool it in the air, and connect it with a K-type thermocouple The temperature measuring instrument monitors the temp...

Embodiment 2

[0033] The 1.4mm thick 22MnB5 high-strength steel plate is selected, and the titanium alloy plate is 1.7mm thick Ti6Al4V. Cut the steel plate and titanium alloy plate into circular plate-sized specimens with a diameter of 100mm; figure 2 shown), after the sheet is heated to 850°C, it is taken out and placed on a spherical mold for hot stamping at a stamping speed of 35mm / s.

[0034] The stamping depth of the titanium alloy sheet obtained in this embodiment is 35mm, and compared with the single-layer sheet stamping forming process, the part depth is increased by 133.3%. Part formability has been greatly improved.

Embodiment 3

[0036] In this embodiment, a 1.4mm thick 22MnB5 high-strength steel plate is selected, and a 1.7mm thick Ti6Al4V is selected as a titanium alloy plate. Cut the steel plate and titanium alloy plate into 180mm×50mm samples; then clamp the sample in the order of steel plate-titanium alloy plate-steel plate and put it into the heating furnace for heating. After heating to 900°C, keep it warm for 5 minutes and take it out. The steel plate and titanium alloy plate are transferred to the U-shaped part mold for stamping test, and the pressure is maintained after stamping and forming, until the titanium alloy plate is fully cooled, and the formed part is taken out.

[0037] The U-shaped part obtained by this embodiment has a small springback angle of 0.45°, which is 83% less than that of the single-layer plate forming process. The rebound angle is much smaller than that of U-shaped parts formed by conventional hot stamping and cold die quenching process.

[0038] The process of the in...

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Abstract

The invention relates to the technical field of aviation plate processing, and provides a hot stamping forming process for titanium alloy multilayer plates. The forming process makes steel plates and titanium alloy plates into blanks of required shapes; The clamping method of alloy-steel is placed in a heating furnace for heating, without adding any adhesive between the three-layer boards, heated to 700-900°C, and then kept warm for 5-7min after reaching the specified temperature; the heated three-layer The sheets are transferred to the cold mold together for stamping and forming; the stamped and formed parts are subjected to die pressure holding for 30-180s, and finally titanium alloy parts are obtained. The invention reduces the heat loss of the sheet metal during the transfer process, increases the stamping formability of the titanium alloy sheet material, and the deformation force required for the hot stamping forming process is small, and the formed parts have high strength, high hardness, and a springback angle Small size ensures product accuracy and quality; simple process, high efficiency, and broad application prospects.

Description

technical field [0001] The invention relates to the technical field of aviation plate processing, in particular to a hot stamping forming process of a titanium alloy multilayer plate. Background technique [0002] The aerospace industry is an important industrial foundation for national defense security, not only a national strategic pillar industry, but also a manifestation of the country's comprehensive national strength. With the rapid growth of my country's economy, in view of the development of the current international situation and the country's strategic needs, as well as the replacement of active aircraft, my country's various advanced aviation and aerospace products, such as various advanced fighter jets, regional and main line passenger aircraft, large transport aircraft, The demand for space vehicles and the like is increasing. The existing technical level and production capacity can no longer meet the needs of our country, leading to the current situation that a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/02B21D37/16
CPCB21D22/02B21D37/16
Inventor 王宝雨杨晓明李志强
Owner UNIV OF SCI & TECH BEIJING
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