Thermoforming method of titanium alloy hook surface part

Abstract

The invention discloses a thermoforming method of a titanium alloy hook surface part, which comprises the following steps: placing a forming die into a heating furnace of a press machine; placing the titanium alloy in the die, and heating the work blank and the die; conducting stamping forming on the work blank through the die by the press machine; opening the die after the workpiece and the die are cooled, taking out the workpiece, so as to accomplish titanium alloy surface part forming; the method provided by the invention is characterized in that the cooling is furnace cooling of the workpiece and the die, and the die is in a clamping state during the cooling process, that is the terrace die and the die are not separated. The invention further discloses a workpiece prepared by the method. According to the method provided by the invention, the heat shrinkable size is neglected, hook surface titanium skin, with a molded surface accuracy within 0.2 mm, can be conveniently processed, the quality consistency is good, and the heat formed die can be used as a test die base of the workpiece molded surface.

Description

technical field [0001] The invention relates to the technical field of manufacturing titanium alloy curved surface parts, in particular to a hot forming manufacturing method for titanium alloy curved surface parts. Background technique [0002] Titanium alloy curved surface parts are often used in aerospace products, such as titanium alloy skins, and such parts are generally formed by hot forming. [0003] Metal molds are generally used for hot forming of titanium alloys. Usually, the mold is first heated to a forming temperature above 650°C, and then the billet is put into the mold to preheat, and then the upper and lower molds of the mold are molded to form parts, and the pressure is kept for 5 to 10 minutes by a hydraulic press, and the mold is separated after forming. Remove the parts after they have cooled properly. [0004] When the titanium part and the mold are heated, the size of the two will increase with the increase of temperature. Generally, the size of the me...

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Problems solved by technology

[0006] However, due to the difficulty of accurately specifying the scale factor and the existence of the scale factor error, the shape of the formed part cannot reach the nominal size, that is, the actual size will deviate from the nominal size

Moreover, after the titanium alloy workpiece is formed, the mold is separated, and the workpiece is taken out. The contraction process of the workpiece cannot be supported by the punch and die of the mold. The workpiece has springback and deformation under unconstrained conditions, resulting in surface accuracy at room temperature not meet the requirements

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