An electrothermal stretch-bending device for aircraft titanium alloy profiles

Abstract

The invention discloses an electric heating stretching-bending forming device for airplane titanium alloy sectional materials. The electric heating stretching-bending forming device comprises a stretching-bending machine rotating table, a stretching-bending die, a heat preservation cover and a sectional material heating system. An insulation heat isolation base is fixed on the stretching-bending machine rotating table. The stretching-bending die is arranged on the insulation heat isolation base. The heat preservation cover is arranged above the insulation heat isolation base. When the heat preservation cover is placed down, the heat preservation cover covers the stretching-bending die. Heat preservation is carried out on the stretching-bending die. The sectional material heating system is arranged on the outer periphery of a stretching-bending machine and is connected through a lead wire, and the sectional materials are heated. The heating lead wire is guided out from a lead wire outlet of the insulation heat isolation base. One end of the sectional materials is placed at a die clamping head of the stretching-bending die to be clamped, and the other end of the sectional materials is fixedly connected with an insulation end. The insulation end is clamped through a stretching-bending machine clamp. The sectional materials are heated to a set temperature after electrifying, then stretching-bending forming is carried out, so that titanium alloy plasticity is improved, deformation resistance is lowered, and the forming performance of titanium alloy is effectively improved. The forming device has the advantages of being high in heating speed, and temperature control is easy.

Description

Technical field [0001] The invention belongs to the technical field of metal profile stretch-bending forming, and specifically relates to an electric heating stretch-bending forming device for aircraft titanium alloy profiles. Background technique [0002] The stretch-bending forming of profiles has been widely used in aircraft manufacturing. It is mainly used to form the connecting parts of the fuselage, bulkheads, ribs and engine mounts. The use of it can make the parts obtain a reasonable calibration margin and improve the manufacturing of the parts. Precision, reduce the manufacturing cost of parts. However, with the increasing requirements for product processing accuracy, the defects such as springback, wrinkling and outer layer rupture in the stretch-bending process of existing profiles have become more prominent, limiting the application of traditional stretch-bending forming. Therefore, the hot stretch-bending process of heating the material blank has been more applied. ...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this inventive method is that the auxiliary heating resistance wire is half-embedded in the upper panel insulation layer and the bottom panel insulation layer of the heating box for auxiliary heating, and the mold itself does not use other heating measures, and the profiles on both sides of the heating box There is no thermal insulation treatment for the entry opening, and the temperature of the mold itself will not be heated too high, so that the temperature difference between the mold and the profile is relatively large, which will affect the molding effect

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