Manufacturing process for aircraft skin

Abstract

The invention relates to the field of manufacturing of aircrafts, and specifically relates to a manufacturing process for an aircraft skin. The manufacturing process comprises the steps of 1) reserving technical bosses at two locating ends of the skin during forming the skin; 2) milling a left locating hole, a right locating hole and a marking hole in the technical bosses at two locating ends of the skin; 3) determining a processing area; 4) locating and flexibly clamping a skin component; 5) determining a processing sequence of the processing area; 6) sequentially processing each processing area by milling the surface, milling a sink, cutting to form a through window, drilling holes and trimming according to the processing area processing sequence as determined in step 5) until the skin processing is performed for all processing areas. With the adoption of the manufacturing process for the aircraft skin, the technical problems of environmental pollution caused by milling and processing the skin and accurate manufacturing of single-curved and double-curved skin components can be solved, the costs of designing, manufacturing, storing and transporting hard components can be saved, and the deformation of the skin component in processing can be reduced.

Description

technical field [0001] The invention relates to the field of aircraft manufacturing, in particular to an aircraft skin manufacturing process. Background technique [0002] Aircraft skin parts are important force-bearing components that constitute the shape of the aircraft. They have single curvature and double curvature shapes. They have the characteristics of large and complex structures, thin walls, and easy deformation. Structural features such as through windows and holes, plus the characteristics of variable cross-section and unequal thickness, make it difficult to manufacture. The processing methods generally used for aircraft skin parts are as follows: ① After the skin is unfolded, it is vacuum-adsorbed and then counted and milled, and then shot peened; A manufacturing process combining milling and digital milling. Using the first manufacturing process, it is impossible to complete the processing of through holes and through windows on skin parts, and it requires di...

AI Technical Summary

Problems solved by technology

Using the first manufacturing process, it is impossible to complete the processing of through holes and through windows on skin parts, and it requires digital milling equipment and shot blasting equipment. The process flow is complicated, and shot peening is a special process, which requires special process qualifications; Two kinds of manufacturing processes, each skin part needs to order special tooling, because the skin part is a super large aircraft structure, so the high cost of tooling is not suitable for the production needs of small batches and multiple varieties of aircraft skin; comprehensive consideration of processing Efficiency, processing quality and processing cost factors, the third manufacturing process is usually widely used to complete the precise machining of aircraft skins, the manufacturing process combining chemical milling and digital milling, skin processing requires at least two clamping, chemical milling solves complex For processing problems such as through windows and sinking, the vacuum adsorption skin gantry milling system solves the skin trimming and drilling processes, involving chemical milling, forming, CNC machining and other process links

Due to the complex manufacturing process of chemical milling and digital milling, poor process coordination, and the waste chemical milling fluid will pollute the environment, which does not meet the requirements of green manufacturing. Therefore, the aviation industry has been looking for green and accurate alternatives to chemical milling. Skin Manufacturing Technology

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