Method for sinking formation of composite material wallboard tool

Abstract

The invention relates to a method for sinking formation of a composite material wallboard tool. The method comprises the following steps: (1) causing the blanking thickness to be a according to the overall unfolded dimension of the wallboard tool and setting a basic hole; (2) respectively forming open grooves at the sunk upper edge position and the sunk lower edge position of the wallboard tool; (3) arranging an inclined plane at the end of a forming die; (4) respectively performing alignment on center lines of central V-shaped 45-degree grooves of the upper edge and the lower edge, performing heating to 500-550 DEG C, and under the gravity effect after the heating, enabling the suspended wallboard tool to sink naturally and completely adhere to the forming die; (6) using welding rods to fill a wallboard tool process groove; (7) performing destressing heat treatment; and (8) performing numerical control processing of the wallboard tool, so that the sinking formation is finished. The method can remarkably improve forming accuracy of an overall steel plate of a large curved surface composite material tool and steel plate surface streamline, reduce working strength and avoid the dependence on mechanical equipment and workers' processing capabilities, and a standardized forming process can be established.

Description

technical field [0001] The invention relates to a sinking forming method for composite material wallboard tooling, which is suitable for the manufacture of large aviation composite material tooling and belongs to the field of mechanical processing and sheet metal forming. Background technique [0002] With the continuous development of aviation manufacturing technology, large-scale composite wall panels with good aerodynamic performance and strength are widely used in the field of aircraft design and manufacturing. The yield rate of similar parts is low, and the manufacturing cost is high. Among them, the manufacturing level, stability and service life of the tooling used for forming large composite wallboard parts are the main factors affecting the forming rate and forming quality of parts. In the past processing process, tooling manufacturing defects such as cracking, deformation and welding sand holes in the sag of the tooling surface often occurred, which affected the y...

AI Technical Summary

Problems solved by technology

However, this method of butt seaming and welding brings hidden dangers to the sealing and strength of the composite parts after forming, and the steel plate on the tooling must withstand large changes in pressure and temperature in the autoclave when the composite material is formed. The sag of the tooling welding is prone to stress release, resulting in cracking and deformation of the tooling, resulting in the overall scrapping of large composite parts

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