Titanium alloy sheet electric auxiliary segmentation progressive forming device and method

A kind of incremental forming, electric-assisted technology, applied in metal processing, forming tools, metal processing equipment and other directions, can solve the problems of low material utilization, serious oxidation of parts, long forming cycle, etc., to achieve fast heating speed, high processing efficiency, The effect of improving the formability

Active Publication Date: 2019-04-16
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

A search for the forming method of metal edge wrapping of composite materials found that Xie Lansheng of Nanjing University of Aeronautics and Astronautics et al. carried out edge forming on TB8 titanium alloy at 625°C, and kept it warm for 10 minutes, which has a small amount of springback. This method requires overall heating of the mold. High energy consumption, long forming cycle, and severe oxid

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  • Titanium alloy sheet electric auxiliary segmentation progressive forming device and method
  • Titanium alloy sheet electric auxiliary segmentation progressive forming device and method
  • Titanium alloy sheet electric auxiliary segmentation progressive forming device and method

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[0031] Example

[0032] like figure 1 , 2 As shown in the figure, it is an electric-assisted segmental incremental forming device for titanium alloy sheets. In this embodiment, experiments are carried out using the machined die and the corresponding titanium alloy sheets to verify the electric-assisted segmental incremental forming of large and medium-sized titanium alloy sheets in actual production. In the forming process, the forming device includes: upper die base 1, lower die base 2, upper insulating pad 3, lower insulating pad 4, punch 5, concave die 6, titanium alloy sheet 7, sheet positioning pin 8, copper Electrode 9 , large current-carrying wire 10 , high-energy DC pulse power supply 11 , guide sleeve 12 and guide post 13 .

[0033] Among them, the upper die module and the lower die module are connected by the guide post 13, the titanium alloy sheet 7 is formed when the die is closed, and the temperature measuring device measures the temperature of the sheet and the...

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Abstract

The invention relates to a titanium alloy sheet electric auxiliary segmentation progressive forming device and method. The device comprises a concave mold, a convex mold and a pulse power source. Theconcave mold and the convex mold are connected with the pulse power source, and the concave mold is wider than the convex mold; in the working process, the device is installed on a press, the length of a sheet is larger than the width of the concave mold, the sheet is placed between the concave mold and the convex mold, output current of the high-energy direct current pulse power source flows through the convex mold, the sheet and the concave mold to form a loop, and the sheet is subjected to segmentation progressive heating forming. Compared with the prior art, the high-energy direct currentpulse power source is adopted to directly heat a forming blank, heating of the whole set of mold is not needed, the heating speed is high, influences of heating on performance deterioration and surface oxidation on the titanium alloy sheet are reduced, the forming property of the titanium alloy sheet is improved, and springback after forming of the titanium alloy sheet is reduced; and combined with a segmentation progressive forming process, a large-scale titanium alloy thin-walled member can be formed, and the requirements of helicopter paddles to the titanium alloy overall edging can be met.

Description

technical field [0001] The invention relates to a titanium alloy thin plate forming device and method, in particular to a titanium alloy thin plate electrically assisted segmental progressive forming device and method. Background technique [0002] Titanium alloy has become a commonly used material in aerospace because of its high specific strength, high temperature resistance, corrosion resistance and other excellent properties. Helicopter rotor blades are increasingly made of composite materials, but composite material blades are prone to delamination and damage when impacted, so it is necessary to wrap the leading edge of the blade. The weight and corrosion resistance of the leading edge wrapping of the blade have a great influence on the service life of the blade. It has become a development trend to use titanium alloy instead of stainless steel as the leading edge wrapping material of the helicopter blade. Titanium alloys have poor room temperature plasticity, and room...

Claims

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Application Information

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IPC IPC(8): B21D37/12B21D37/16B21C51/00
CPCB21C51/00B21D37/12B21D37/16
Inventor 李细锋陈鑫朱富慧陈军
Owner SHANGHAI JIAO TONG UNIV
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