Skin part longitudinal stretching woolen size determination method

Abstract

The invention relates to the field of aerospace manufacturing, in particular to a skin part longitudinal stretching woolen size determination method. The method comprises the steps that 1, the composition of stretching woolen is analyzed, in the skin longitudinal stretching process, the situation that the woolen wraps a mold is analyzed, the woolen is divided into a part zone, a mold allowance, a suspending section, a clamping section and a clamping guiding section according to the contact between the woolen and the mold and a clamp, and the size of the woolen should be obtained by overlaying the sections; 2, the part size range is obtained through the method for calculating the longitudinal and transverse part length; 3, the woolen size is calculated and is composed of the part unfolding length, the allowance, the suspending section and the length of the clamp. According to the skin part longitudinal stretching woolen size determination method, material waste can be reduced, the woolen size design better adapts to the stretching technological process, and the phenomenon that the longitudinal stretching difficulty is increased due to the poor woolen size is avoided.

Description

technical field [0001] The invention relates to the field of aviation manufacturing, in particular to a method for determining the size of longitudinally stretched wool for skin parts. Background technique [0002] Skin parts are exterior parts that form and maintain the aerodynamic shape of an aircraft. Stretch forming (referred to as stretch forming) is a process method of overmolding with a mold, and it is one of the main forming methods for forming aircraft skin parts. The two sides of the wool are clamped by the clamp of the equipment, and the movement of the mold and the clamp is used to make the wool produce uneven stretching deformation, and the mold is covered to make the wool and the mold fit. [0003] Stretching is the main process method of skin forming, and skin stretching technology is an important symbol to measure the ability and level of aircraft manufacturing. The manufacturing level of skin parts directly reflects the level achieved by the aviation manuf...

AI Technical Summary

Problems solved by technology

In production, the design of drawing dies and the determination of drawing process parameters basically still rely on the experience of technicians and production workers. The mold design process and parts trial production process are very blind. This traditional "experience-based "The trial pull method makes the waste of materials in the production and trial production of skin parts still serious

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