Technology method of overall forming of large curved surface composite material tool steel plate

Abstract

The invention discloses a technology method of overall forming of a large curved surface composite material tool steel plate. By means of preforming, heat treating, hot coal laying, steel ball filling, vibrating, heating and other steps, overall forming of the large curved surface composite material tool steel plate is finished. The method is suitable for curved surface forming of the large steel plate and especially can solve the problem of double-curved-surface forming of the large steel plate. The method can improve the forming precision of the large overall steel plate, guarantee the surface quality of the steel plate, lower the working intensity of operators and reduce potential safety hazards. Dependence on mechanical equipment strokes and skill of the operators is avoided. Standard forming technology procedures are established. The thickness of the tool forming steel plate is even, heat conduction is stable, the yield of finished products of composite materials is greatly increased, and the effective service life of a tool is greatly prolonged.

Description

technical field [0001] The invention relates to a process method for integral forming of a steel plate, in particular to a process method for integral forming of a large-scale curved surface composite material tooling steel plate. Background technique [0002] In the field of composite material tooling manufacturing, especially in the aviation field, it is required that the formed steel plate used for the tooling must be a whole metal plate, the metal plate cannot be spliced, and there must be no welding seams. The metal plate used in the tooling is required to be integrally formed. The metal forming process with large changes in section curvature and large thickness is very difficult, and there are great equipment and personnel risks in the forming process, and the springback, forming accuracy and construction period of the steel plate cannot be effectively controlled. [0003] In the prior art, the following problems are usually encountered in the forming process of manufa...

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Problems solved by technology

[0004] 1. When the steel plate is formed after deep drawing and heating by large-scale mechanical equipment, when the curvature of the steel plate changes greatly, it exceeds the stroke of the equipment or interferes with the mechanical components of the equipment, and the forming process cannot be completed

[0005] 2. When the equipment cannot complete the forming process, the steel plate is usually heated by gas welding and external force is applied to complete the forming process of the steel plate. Only partial sheet metal forming can be performed, and the control of the curvature of the overall surface is lacking, and the streamlinedness of the steel plate cannot be guaranteed.

[0006] 3. Whether it is large-scale mechanical equipment, labor or the method of combining equipment and labor, there are some shortcomings. The forming of the overall steel plate of large-scale curved surface composite material tooling will cause inaccurate forming accuracy, uncontrollable force, and streamlined steel plate surface. problems such as poor precision, high processing labor intensity, high risk of equipment and personnel, and inability to standardize

[0007] The curved steel plate formed by the existing technology, due to the inaccurate forming precision of the steel plate, the thickness of the steel plate will be uneven in the CNC machining, and the thickness difference is generally 3-7mm

The thickness of the steel plate is inconsistent. During the forming process of the composite material, when the tooling heats up and cools down, there are phenomena such as uneven conduction temperature difference, asynchronous expansion and contraction, and sudden stress release, which cause stress during the forming and curing process of the composite material. and deformation, seriously affecting the quality of composite finished products

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