Rapid manufacturing method of composite thin shell mold surface for aircraft
A mold surface and composite material technology is applied in the field of rapid manufacturing of composite material thin shell mold surfaces for aircraft, and can solve the problems of workpiece deformation affecting accuracy, high material cost, high processing and manufacturing cost, and large tooling thickness.
Active Publication Date: 2017-01-04
哈尔滨新科锐工艺装备制造有限公司
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is that in the molding process of large-scale and precision composite material parts, the mold material is generally Invar, and the material cost and processing and manufacturing cost are too high. Therefore, the deformation of the workpiece caused by the impact on the precision is the main problem in the actual production. The present invention proposes to use the method of thermoforming to manufacture the thin shell mold surface, that is, to heat the metal plate material used to manufacture the mold surface to reach a certain level. Take it out after temperature, put it on a simple forming mold, fix it and pressurize it, and then carry out CNC finishing after cooling and forming to obtain the mold surface for composite material forming
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[0023] The technical solution can also be realized through the following technical measures and the present invention will be further described below in conjunction with the accompanying drawings:
[0024] figure 1 It is a flow chart of the rapid manufacturing method of the thin shell mold surface of the present invention, and the method comprises the following steps:
[0025] (1) Select the material specifications for manufacturing the mold surface, and select a plate with a suitable plane size according to the size of the required mold surface, and select the thickness specification as 10-12mm;
[0026] (2) Compensation and repair of the simple mold surface. According to the thermal expansion coefficient of the mold material, the composite material mold surface is compensated. The specific method is to scale up the composite material mold surface according to the thermal expansion coefficient of the mold material to obtain a simple mold. The profile, the enlarged ratio is Δ...
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Abstract
The invention relates to a quick profile manufacturing method of a composite material thin-shell mold for an aircraft. Aiming at the defects of higher deformation and the like caused by high material cost and higher thermal capacity due to the fact that a mold is ordinarily manufactured by entirely cutting a metal material such as Q235A and Invar and the thickness of a mold tool is larger in the forming process of large-sized and precise composite materials, the invention provides the quick profile manufacturing method of the thin-shell mold. Thinner sheet metal of which the thickness is 10-12mm is selected as a raw material and is subjected to wrinkling preprocessing, heating die assembly forming, cooling, seam welding and numerical control finishing forming to manufacture the thin-shell mold of which the thickness is at least 4mm by performing profile compensation shape modifying and plastic cloth film coating test on a simple special mold, the profile thickness of the manufactured thin-shell mold is small and uniform, the material cost is reduced, the thermal capacity is lower, thermal deformation generated during the manufacturing of composite material parts is lower, and the manufacturing accuracy of the composite material parts is improved.
Description
technical field [0001] The invention relates to a method for rapid manufacturing of composite material thin shell mold surface for aircraft. Background technique [0002] At present, composite material forming molds for aircraft are mainly manufactured by integral cutting of metal materials. Due to the characteristics of high temperature resistance, wear resistance and long service life of metal materials such as Q235A and Invar, they have become the main materials for composite mold tooling manufacturing. Q235A has the advantages of complete thickness specifications, low cost, and sufficient supply. It is the most commonly used material in actual production, but because its thermal expansion coefficient is quite different from that of the workpiece, it is not suitable for manufacturing large and precise composite material parts; and the thermal expansion coefficient The cost of the mold material Invar, which is close to the workpiece, is too high, and the thickness specific...
Claims
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IPC IPC(8): B23P15/24
CPCB23P15/24
Inventor 徐英杰韩志仁王青刘宝明刘建波吴子斌林明张德生徐褔泉丁志德扈心建张力安周立忠蒋世英王义双杨长兵赵鑫王喜孙龙吴继超张颜龙姜涛
Owner 哈尔滨新科锐工艺装备制造有限公司