An induction heating stretch bending forming device for aircraft profiles

Abstract

The invention discloses an induction heating stretch-bending forming device for aircraft sectional materials. The device comprises a stretch-bending mold, an induction heating system, a coil feeding mechanism and an insulation cushion layer, wherein the insulation cushion layer is used for the insulation treatment between the stretch-bending mold and a working table; the stretch-bending mold is mounted on the insulation cushion layer; the induction heating system is positioned at the outer side of the stretch-bending forming device; induction coils are positioned at the outer sides of the sectional materials; a magnetic field is generated around the induction coils after the electrification; the sectional materials are positioned in the magnetic field; the temperature rises through cutting magnetic lines of force; the coil feeding mechanism is mounted on a chuck of a stretch bender for finishing the feeding movement of the induction coils; a temperature sensor adopts a non-contact temperature sensor for measuring the temperature of the sectional materials in real time; and the output power of a power supply is adjusted according to temperature feedback signals so as to stabilize the heating temperature of the sectional materials. The forming device realizes thermal stretch-bending formation of the aircraft sectional parts, improves the forming precision and the structure stability, and guarantees the surface quality of the formed parts.

Description

technical field [0001] The invention belongs to the technical field of stretch bending forming of metal profiles, and in particular relates to an induction heating stretch bending forming device for aircraft profiles. Background technique [0002] When profile parts are used in various fields of construction, machinery manufacturing, transportation and daily necessities manufacturing, considering the requirements of structural mechanics, aerodynamics and product aesthetics, profiles usually need to be bent into a certain arc. The principle of stretch bending is to apply a tangential tension to the profile and change the position of the internal neutral layer to bend the profile. Stretch bending process has a good forming effect for bending parts with relatively large yield strength, and has high bending quality and small springback. Stretch bending forming of profiles has been widely used in aircraft manufacturing. It is mainly used to form the connecting parts of fuselage,...

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Problems solved by technology

[0004] In order to avoid the deficiencies in the prior art, overcome the problems that resistance heating is difficult to concentrate the heat and obtain a large current density locally, and the heating and cooling rates of the profiles are slow during the heating process; the invention proposes an induction heating system for aircraft profiles. Heated stretch bending forming device, through the forming device, realizes the hot stretch bending of aircraft profile parts, improves the forming performance of the material, reduces the springback and wrinkling of the profile during the forming process, improves its forming accuracy and tissue stability, and ensures the forming Surface quality of machined parts

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