Thermal superplastic forming method of special-shaped curved surface hollow skin

A special-shaped curved surface, superplastic forming technology, applied in the direction of forming tools, transportation and packaging, manufacturing tools, etc., can solve the problems of low product quality, high processing cost, long processing time of special-shaped curved surface hollow skin, etc., to achieve surface quality improvement , Reduce the difficulty of forming, shorten the processing cycle and the effect of cost

Active Publication Date: 2021-12-28
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a thermal superplastic forming method for special-shaped curved surface hollow skin to solve the existing technical problems of long processing time, high processing cost and low product quality of special-shaped curved surface hollow skin

Method used

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  • Thermal superplastic forming method of special-shaped curved surface hollow skin
  • Thermal superplastic forming method of special-shaped curved surface hollow skin
  • Thermal superplastic forming method of special-shaped curved surface hollow skin

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Embodiment 1

[0100] This example 1 provides a special-shaped curved surface hollow skin thermal superplastic forming method; the material of the part is 5A06 aluminum alloy, the thickness is 20mm, the length, width and height are 310mm × 160mm × 100mm, and the part model is as follows Figure 7 shown is a hollow ribbed skin on a double-curvature profiled surface.

[0101] The specific method steps are as follows:

[0102] Step 1. The blank is digitally expanded. This product is a double-curvature special-shaped surface. The conventional method of using UG (software for sheet metal expansion models) to expand the model cannot be expanded; it is necessary to extract the model sheet in UG, export the iges model file, and then use the iges format file. Import into the forming suite to simulate the forming process and unfolding size; get the unfolded material size such as Figure 8 ;

[0103] Step 2, according to the size of the unrolled material obtained in step 1, blanking is performed. In...

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Abstract

The invention relates to a thermal superplastic forming method of a special-shaped curved surface hollow skin, belongs to the field of thermal superplastic forming machining, and solves the technical problems of long machining time, high machining cost and low product quality of an existing special-shaped curved surface hollow skin. The method comprises the following steps that 1, a special-shaped curved surface hollow skin model is digitally unfolded to obtain the size of an unfolded material; 2, blanking is conducted according to the size of the obtained unfolded material, and ribs and cavities of an inner molded surface are milled on a blank through a three-dimensional numerical control machine tool; 3, thermal superplastic forming is conducted, specifically, thermal superplastic forming is conducted on the blank of which the ribs and the cavities of the inner molded surface are milled, so that a working procedure piece of which the molded surface is attached to a machining and manufacturing mold is obtained; 4, three-dimensional numerical control milling is conducted to remove allowance, specifically, a three-dimensional numerical control machine tool is used for removing the allowance of a working procedure part after thermal superplastic forming, and the special-shaped curved surface hollow skin meeting the size requirement is obtained; and 5, effect detection is conducted. According to the method, the machining cost and the production period of the special-shaped curved surface hollow skin are reduced.

Description

technical field [0001] The invention relates to the technical field of thermal superplastic forming processing, in particular to a thermal superplastic forming method of a hollow skin with a special-shaped curved surface. Background technique [0002] With the increasingly complex development of aerospace parts, the requirements for lightweight aerospace parts have attracted more and more attention. [0003] For special-shaped surface skins, in order to reduce weight and increase strength, the structure mostly adopts vertical and horizontal internal rib structure, and the processing and manufacturing of this structure has always been a bottleneck problem. [0004] The conventional method is to first thermoform the hollow skin of the special-shaped surface, and then use the five-axis CNC machine tool to process the ribs and cavities of the inner surface. However, the conventional method has several shortcomings: (1) First hot forming and then machining the inner surface, bec...

Claims

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Application Information

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IPC IPC(8): B21D53/88B21D53/92B21D37/10B21D37/16B23P15/00
CPCB21D53/88B21D53/92B21D37/10B21D37/16B23P15/00B23P2700/01
Inventor 周蕾蕾刘奇张珊珊韩维群姚为李保永李信韩冰秦中环刘吉琛
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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