Helicopter blade covered edge forming method

A helicopter and hemming technology, which is applied in the direction of metal processing equipment, etc., can solve problems such as easy deformation, affecting performance, and inapplicability to hemming and forming of complex-shaped parts.

Active Publication Date: 2021-06-08
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology described in this patented describes an improved way to make small turbine engine components with curved edges that are easier to manufacture than traditional methods like cutting them out manually. It also allows for more precise edge formation without requiring expensive tools such as lasers or grinders. Overall, it provides technical benefits over existing techniques while reducing their complexity and cost compared to current processes.

Problems solved by technology

This patented describes different ways to make helmet blinds that have better protection against rainwater damage compared to traditional metal materials like iron plating. One way involves create separate pieces called lead edges wrapped around each section of the blender's rotors before they are joined into complete wraps on their own support frame. Another approach uses thermal processing techniques to achieve desired results without causing distortion during manufacturing processes.

Method used

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  • Helicopter blade covered edge forming method
  • Helicopter blade covered edge forming method
  • Helicopter blade covered edge forming method

Examples

Experimental program
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Effect test

Embodiment 1

[0050] It is estimated that the wall thickness of the hemming part obtained by forming processing is 0.5mm, and the length is 5m. image 3 A schematic diagram of the outline of the hemming parts is shown. A TC4 titanium alloy tube with an outer diameter of 190mm and a wall thickness of 0.6mm is used as the raw material. The TC4 titanium alloy tube is processed into a flat special-shaped tube by hot rolling, and the cross-sectional shape of the flat special-shaped tube is as follows Figure 4 shown. The flat special-shaped pipe is processed into a length of 5.5m by wire cutting method; the two end faces of the flat special-shaped pipe are welded with the same TC4 titanium alloy plate with the same cross-sectional shape as the flat special-shaped pipe respectively, and the TC4 titanium alloy plate is The thickness of the plate is 1mm, and a hole with a diameter of 8mm is processed in the middle of one of the TC4 titanium alloy plates, and a titanium alloy air expansion pipeline w

Embodiment 2

[0052] It is estimated that the wall thickness of the hemming part obtained by the forming process is 0.8mm, and the length is 10m. image 3 A schematic diagram of the outline of the hemming parts is shown. A TC4 titanium alloy tube with an outer diameter of 240mm and a wall thickness of 1.0mm is used as the raw material. The TC4 titanium alloy tube is processed into a flat special-shaped tube by hot rolling, and the cross-sectional shape of the flat special-shaped tube is as follows Figure 4 shown. The flat special-shaped pipe is processed by wire cutting to a length of 10.5m; the two ends of the flat special-shaped pipe are welded with argon arc welding, and TC4 titanium alloy plates with the same cross-sectional shape as the flat special-shaped pipe are respectively welded, and the thickness of the TC4 titanium alloy plate is 1mm. , and process a hole with a diameter of 8mm in the middle of one of the TC4 titanium alloy plates, and weld a titanium alloy air expansion pipeli

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Abstract

The invention belongs to the field of titanium alloy sheet forming, and particularly relates to a helicopter blade covered edge forming method. The covered edge forming method comprises the steps that a thin-wall titanium alloy pipe is subjected to pre-forming treatment to obtain a flat special-shaped pipe; the flat special-shaped pipe is subjected to air pressure thermal expansion forming treatment through an air expansion mold, and a double-covered-edge composite part is generated; and the double-covered-edge composite part is cut to obtain covered edge parts. The covered edge forming method is suitable for large-size covered edge forming treatment of a helicopter blade, and the problems that in the prior art, the requirement for helicopter blade covered edge forming machining equipment is high, or deformation and low precision are prone to occurring by adopting segmented welding are solved.

Description

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Claims

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Application Information

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Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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