Self-resistance electric heating incremental free bending forming fixture and forming method for aircraft profiles
A technology for bending and forming of aircraft profiles, applied in the field of bending and forming of aircraft profiles, can solve the problems of high energy consumption, limited incremental step length, long cycle, etc., and achieve low energy consumption, short cycle and good versatility
Active Publication Date: 2021-11-30
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
[0004] In order to overcome the deficiencies in the prior art that require rigid molds, long cycle times, high energy consumption, and limited incremental step lengths, this invention proposes a self-resistance electric heating incremental free-bending forming fixture and forming method for aircraft profiles
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[0072] This embodiment is a fixture for self-resistance electric heating incremental free bending forming of T-shaped aircraft profiles.
[0073] The jig includes a bending jig 2 and a fixing jig 3, and the bending jig and the fixing jig are used in cooperation.
[0074] The cross-section of the aircraft profile 1 is T-shaped, the horizontal plate at its upper end is a chord, the vertical plate under the chord is a web, and the web is located at half of the width of the chord.
[0075] The bending fixture 2 includes a support plate 13 , a side pressure support plate 9 , a side pressure baffle plate 10 , two sets of hydraulic devices, a U-shaped frame 11 and a cover plate 12 . The cover plate is fixed on the upper end surface of the U-shaped frame to form a frame together. The mechanisms of the two groups of hydraulic devices are the same, and are composed of a hydraulic cylinder 6, a hydraulic rod 7 and a flange 8 respectively. The side pressure baffle 10 is fixed on the upp...
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Abstract
A self-resistance electric heating incremental free-bending forming fixture and forming method for an aircraft profile, which clamps the two ends of the aircraft profile with the clamps that are respectively adapted to the section of the profile. The electrode connection device is connected to the copper electrode sheet embedded in the contact part of the fixture and the profile, so that the profile is self-resistance and electrically heated after being energized, and the bending fixture and the fixing fixture are driven by the industrial mechanical arm to perform segmental torsional bending on the aircraft profile until the plane The guiding line of the profile space shape meets the design requirements. The present invention has short bending deformation cycle and high efficiency; in each incremental step, only the profile in the incremental step needs to be heated, no anti-oxidation protection is required, and the energy consumption is low; the temperature field of the profile in each incremental step The distribution is uniform, the deformation resistance is low, and the tonnage of the required equipment is small; no need to design and manufacture rigid molds, it can meet the bending and forming of aircraft profiles with complex space shape guide lines; the bending and torsion of aircraft profiles can be realized by industrial robots, and the versatility is good.
Description
technical field [0001] The invention relates to the field of bending forming of aircraft profiles, in particular to a self-resistance electric heating incremental free bending forming method of aircraft profiles. Background technique [0002] In order to meet the requirements of lightweight design, aircraft profiles have three-dimensional space guide lines. The traditional bending of aircraft profiles requires rigid molds, which can only meet the production design requirements after repeated mold repairs, and the production cycle is long. With the wide application of difficult-to-form materials in aircraft profile bending parts, the general room temperature bending forming method is difficult to meet the forming requirements of this type of profile bending parts, so the hot bending method is often used in production to realize the bending forming of this type of profile. In this hot bending forming process, the method of integrally heating the profile and the mold is widely ...
Claims
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IPC IPC(8): B21D7/00B21D7/16
CPCB21D7/00B21D7/162
Inventor 仝朋艳王永军孙兴顾锐闾家阳陈轲
Owner NORTHWESTERN POLYTECHNICAL UNIV