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本文针对大、中型飞机生产中出现的严重不协调现象,对厂房地坪相对于室温变化的伸缩情况,进行了试验研究。测出了厂房地坪相对于室温变化的伪热膨胀系数α地伪,找出了在与地坪固定的型架中装配产品时,产生严重不协调现象的原因是厂房地坪的伪热膨胀系数大大小于工装和产品常用材料钢和铝合金的热膨胀系数,而严重地影响着固定于地坪上的型架中各尺寸随室温变化的伸缩量。同时也导出了在不同结构型式、不同材料的工装间,在不同室温下装配产品时,所产生的热膨胀综合误差的通用计算公式。探讨了型架结构发展的方向。
In this paper, large and medium-sized aircraft in the production of serious uncoordinated phenomenon, the plant floor relative to the room temperature changes in the telescopic situation were tested. The pseudo-thermal expansion coefficient α of the factory floor relative to room temperature was measured. The reason for the serious uncoordination phenomenon was found when the products were assembled with the floor-type frame. The reason was that the pseudo-thermal expansion coefficient of the factory floor was greatly Less than the tooling and products commonly used materials, thermal expansion coefficient of steel and aluminum alloy, and seriously affect the type of frame fixed on the floor with the size of the amount of expansion and contraction with room temperature changes. At the same time, a general formula for calculating the total error of thermal expansion caused by assembly of products with different types of structures and different materials at different room temperatures is also derived. Exploring the direction of the development of the frame structure.