Stretch forming method for titanium skin part

A technology for stretch forming of skin parts, which is applied in the field of stretch forming of aircraft skin, which can solve the problems of surface waves, large springback, and distortion of parts, so as to prevent slipping, increase friction, and uniform and stable pulling force Effect

Inactive Publication Date: 2013-09-04
SHENYANG AIRCRAFT CORP
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Problems solved by technology

[0003] In order to solve the problems of hyperbolic titanium alloy skin parts, after stretch forming, the amount of springback is large, and the surface of the parts has waves and distortions, the present invention provides a stretch forming method for titanium alloy skin parts that improves the qualified rate of products. method

Method used

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  • Stretch forming method for titanium skin part
  • Stretch forming method for titanium skin part

Examples

Experimental program
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Embodiment 1

[0011] Embodiment 1 A kind of method of stretch forming of titanium alloy skin parts

[0012] 1) Place the titanium alloy skin part blank (2) in the middle of the workbench of the skin stretching machine to ensure that the stretching force can meet the technical parameter requirements during the stretching forming process;

[0013] 2) Adjust the relatively good jaw (1) to the middle position of the stretching machine, which is beneficial to the uniform clamping force of the stretching machine when processing parts;

[0014] Increase the process allowance of 80mm at the end of the titanium alloy skin part blank (2), and glue the aluminum strips (3) on the upper and lower sides here, and the jaws (1) of the skin stretching machine pass through the aluminum strips Clamp the blank of the titanium alloy skin part; the skin stretching machine drives the blank of the titanium alloy skin part to stretch to the yield strength through the jaws, and at the same time makes the blank of th...

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Abstract

The invention relates to a stretch forming method for a titanium skin part. According to the technical scheme, a titanium skin part blank is placed on a skin stretching machine, aluminum strips are glued at the upper end and the lower end of the titanium skin part blank, and the titanium skin part blank is clamped by jaws of the skin stretching machine through the aluminum strips; and the titanium skin part blank stretched towards two sides is driven by the jaws of the skin stretching machine to achieve a yield strength, and the titanium skin part blank is coated on a stretch die till completely fitting the profile faces of the stretch die. Property of being clamped of the black is improved, slipping when a part is clamped by the jaws of the stretching machine is prevented, pull force on the part is even and stable, qualified parts can be produced successfully, requirements of actual production are guaranteed, and qualified-product rate is high.

Description

technical field [0001] The invention relates to a method for stretching and forming aircraft skins, in particular to a method for stretching and forming titanium alloy skin parts. Background technique [0002] on an aircraft, such as figure 1 As shown, there are six hyperbolic aircraft skin parts made of titanium alloy, and the size is about δ0.8×1200×600. According to the original processing technology, the blank of the part is directly placed in the jaws of the drawing machine, and the tension is applied to the blank through the jaws, so that the blank produces uneven stress and tensile strain, and then the bonding surface between the blank and the drawing die gradually expands , until it fits completely with the pull-shaped model surface. In the actual production process, it was found that the titanium alloy parts had a large amount of springback after forming and could not be trimmed by hand. Therefore, after the six aircraft skin parts were processed and formed, there...

Claims

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Application Information

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IPC IPC(8): B21D22/22
Inventor 王志成
Owner SHENYANG AIRCRAFT CORP
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