Roll bending forming die and forming method of large-curvature semi-arc-shaped pipe orifice reinforcing part

A molding method and molding die technology, applied in the field of aircraft manufacturing, can solve the problems of difficult reinforcement, complex production process, and high manufacturing cost, and achieve the effects of stable product quality, fewer molds, and low manufacturing cost.

A molding method and molding die technology, applied in the field of aircraft manufacturing, can solve the problems of difficult reinforcement, complex production process, and high manufacturing cost, and achieve the effects of stable product quality, fewer molds, and low manufacturing cost.

CN110639988AInactive Publication Date: 2020-01-03XIAN AIRCRAFT IND GROUP
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  • Roll bending forming die and forming method of large-curvature semi-arc-shaped pipe orifice reinforcing part
  • Roll bending forming die and forming method of large-curvature semi-arc-shaped pipe orifice reinforcing part
  • Roll bending forming die and forming method of large-curvature semi-arc-shaped pipe orifice reinforcing part

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Embodiment Construction

[0023] Referring to the accompanying drawings, the aircraft parts provided by the embodiment are as figure 1 As shown, the part 1 is a large-curvature high-strength alloy sheet metal part with a trapezoidal notch 2 in cross-section, which is used to strengthen the strength and sealing performance of the pipe fittings. The biggest problem of forming with the existing technology is that the stamping forming is unstable and wrinkled Serious, but manual molding is difficult to make the material yield, it is highly dependent on the technical level of the workers, the surface quality of the parts is poor, and it is impossible to shape the structure of the overall arc more than 1 / 2 circle.

[0024] The molding die that this application proposes is as figure 2 ￣ image 3 As shown, the molding die contains a molding cam 3, a molding concave wheel 4 and a driven concave wheel 5. The longitudinal outer contour section of the molding cam 3 matches the internal shape of the trapezoidal n...

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Abstract

The invention discloses a roll bending forming die and a forming method of a large-curvature semi-arc-shaped pipe orifice reinforcing part. The forming die comprises a forming cam, a forming concave wheel and a driven concave wheel; the forming cam, the forming concave wheel and the driven concave wheel are respectively mounted on three different rollers of an asymmetric three-axis roller bendingmachine; during forming, blank positioning is carried out firstly, then the relative position relation between the forming cam, the forming concave wheel and the driven concave wheel is set, then thethree-axis roll bending device is used for forming, and finally, the pipe orifice reinforcing part passes between the three synchronous rotating rollers and continuously generates axial and longitudinal plastic bending deformation, so that the required cross-sectional shape and the radian shape are obtained.

Description

technical field [0001] The invention relates to sheet metal part forming technology in the field of aircraft manufacturing, in particular to a roll-bending forming die and forming method for a large-curvature semi-arc nozzle reinforcement. Background technique [0002] In order to improve the take-off and landing performance of turboprop regional aircraft under complex conditions such as high-temperature plateau airports and full load conditions, a large number of high-temperature-resistant new materials and special structures are used in the design, especially in the design of the exhaust pipe near the engine, iron-based sedimentation is used The hardened superalloy A286 is used to replace the previous titanium alloy structural parts to meet the high temperature use environment of not lower than 600℃~700℃. [0003] A series of semicircular trapezoidal cross-section nozzle reinforcements are installed at the nozzles of turboprop regional aircraft exhaust pipes and sound-abso...

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Application Information

Patent Timeline
03 Jan 2020
Publication
CN110639988A
IPC
B21D5/08; B21D5/14
CPC
B21D5/08; B21D5/14
Inventors
白颖; 钟李欣