Variable-thickness titanium alloy skin integrated forming method

A titanium alloy and variable thickness technology, which is applied in the field of integrated forming of titanium alloy skin with variable thickness, can solve the problems of material utilization rate less than 10%, low material utilization rate, low processing efficiency, etc., and achieve the improvement of material utilization rate, The effect of improving the product qualification rate and simplifying the process flow

Active Publication Date: 2022-02-01
BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventionally, chemical milling is used for thinning treatment, but chemical milling is a seriously polluting industry, manufacturers are increasingly in short supply, and variable thickness skins are increasingly becoming the bottleneck of aerospace manufacturing
If the skin with variable thickness adopts the overall machining process, it needs to use forgings with the outer contour of the skin for machining, generally from decimeter thickness to millimeter thickness. Not only the processing efficiency is low, but also the material utilization rate is low. The rate is often less than 10%, which also restricts related applications

Method used

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  • Variable-thickness titanium alloy skin integrated forming method
  • Variable-thickness titanium alloy skin integrated forming method
  • Variable-thickness titanium alloy skin integrated forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Design an aircraft transport cabin skin, which is a rectangular arc panel with one corner missing, Figure 4 is a schematic diagram of the skinned plane unfolding, figure 1 It is a schematic diagram of the variable-thickness titanium alloy skin after forming.

[0094]Step 1: The skin material is TA15, and the skin is a curved panel. After unfolding, it becomes a rectangle with one corner missing, with a length of 470mm×width of 400mm. The edge is designed to be 3mm thick for riveting with the skeleton, and the thickness of the skin center is 1mm. In addition, according to design requirements, four pieces of equipment need to be installed on the inner skin, and four bosses are welded or riveted at corresponding positions.

[0095] The installation boss A is a cuboid: 170mm (length) × 80mm (width) × 10mm (height);

[0096] The installation boss B is an isosceles trapezoid: 40mm (waist) × 50mm (long side) × 35mm (short side) × 15mm (height);

[0097] The mounting boss C...

Embodiment 2

[0115] Figure 7 It is a finished drawing of the skin of a certain part of an aircraft shell, and the following is the specific production and implementation process.

[0116] Step 1: The skin material is TA15, the skin is a rectangular arc panel, the length is 380×320mm, the edge is designed to be 3mm thick for riveting with the skeleton, and the thickness of the skin center is 2mm. According to the design requirements, there is a door-shaped convex groove on the skin, and the size is: (70mm+200mm+50mm) (length)×40mm (width)×30mm (depth). In addition, two pieces of equipment need to be installed on the inner skin, and two bosses are welded or riveted at corresponding positions.

[0117] The mounting boss A is a cylinder: 60mm (diameter) × 40mm (height);

[0118] The installation boss B is a short side of a cuboid + two circumscribed half cylinders: 40mm (length) × 20mm (width) × 20mm (height).

[0119] Step 2: Design and manufacture the outer skin 1 with a thickness of 1.0...

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Abstract

The invention relates to a variable-thickness titanium alloy skin integrated forming method, which belongs to the technical field of titanium alloy precision forming, and solves the problems that in the prior art, the material utilization rate is low, the machining efficiency is low, and an existing chemical milling forming process pollutes the environment. Thevariable-thickness titanium alloy skin integrated forming method is characterized in that an outer skin, a gradient reinforcing plate and an inner skin are integrally formed through a high-temperature diffusion bonding technology, and the gradient reinforcing plate is used for adjusting the thickness of the formed skin and is clamped between the outer skin and the inner skin. According to the method, a traditional chemical milling technology is abandoned, environmental pollution is reduced, the requirement for the assembly thickness of the periphery and the framework of the skin part and the requirement for internal thin wall light weight are met, the production efficiency is improved by 30%, the material utilization rate is improved by 60%, and the product percent of pass is improved by 10%.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy precision forming, and in particular relates to an integrated forming method of titanium alloy skin with variable thickness. Background technique [0002] As aerodynamic profile and load-bearing components, titanium alloy skin structure is an essential part in the aerospace field. The skin generally needs to be riveted with the skeleton. Since the skin needs to have a countersunk hole where it is assembled with the skeleton, generally a thicker skin is required for the riveted part, while the skin of the rest of the non-assembly area is thinner, so it needs to be thinned. Conventionally, chemical milling is used for thinning treatment, but chemical milling is a seriously polluting industry, manufacturers are increasingly in short supply, and variable thickness skins are increasingly becoming the bottleneck of aerospace manufacturing. If the skin with variable thickness adopts the overall m...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00B23P2700/01B64C3/20
Inventor 刘太盈王斌鞠伟华周福见郭成龙
Owner BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
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