Core of composite rib box molding mold of helicopter rudder and manufacturing method of core

A technology for composite materials and forming molds, which is applied to the improvement of cores and the field of core manufacturing. It can solve the problems of partial layup displacement, small gaps, composite material rib boxes, etc., and achieve large thermal expansion coefficients, large thermal expansion coefficients, Guarantee the effect of product quality

Inactive Publication Date: 2012-07-25
哈尔滨哈飞航空工业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the existing core is an all-metal core, and there is a gap between the metal core and the inner cavity side wall of the helicopter rudder composite rib box located in the forming mold, and the gap is relatively small, only 0.2mm ~0.4mm
Due to the large thickness error of the uncured helicopter rudder composite rib box blank laid with prepreg, it is easy to appear gaps or interference between the metal core and the helicopter rudder composite rib box blank when installing the metal core The problems caused by partial layup displacement or wrinkles, forming defects in the rib box of the helicopter rudder composite material after curing, and even lead to waste products, reducing the qualified rate of the product

Method used

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  • Core of composite rib box molding mold of helicopter rudder and manufacturing method of core
  • Core of composite rib box molding mold of helicopter rudder and manufacturing method of core
  • Core of composite rib box molding mold of helicopter rudder and manufacturing method of core

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1, the length of the rib box to be formed is 200mm, the width is 150mm, the height is 30mm, and the wall thickness is 0.8mm.

[0028] 1. Manufacture the metal inner core: the distance t=5mm between the lower surface of the metal inner core 4 and the upper surface of the rib box of the helicopter rudder composite material on the bottom plate 1 of the forming mold, the side surface of the metal inner core 4 and the helicopter rudder composite material The distance between the side walls of the inner cavity of the rib box is 5mm;

[0029] 2. Install the metal inner core;

[0030] 3. Paving and affixing helicopter rudder composite material rib box craft parts: the wall thickness of helicopter rudder composite material rib box craft parts is 1.3mm, and other dimensions are the same as those of the finished helicopter rudder composite material rib box;

[0031] 4. Pouring silicone rubber; the grade of pouring silicone rubber is RTV1556A;

[0032] 5. Curing: The s...

Embodiment 2

[0033]Embodiment 2, the rib box to be formed has a length of 320mm, a width of 170mm, a height of 50mm and a wall thickness of 1.8mm.

[0034] 1. Manufacture the metal inner core: the distance t=6.5mm between the lower surface of the metal inner core 4 and the upper surface of the rib box of the helicopter rudder composite material on the base plate 1 of the forming mold, and the side of the metal inner core 4 is composited with the helicopter rudder The distance between the side walls of the cavity of the material rib box is 6.5mm;

[0035] 2. Install the metal inner core;

[0036] 3. Paving and affixing helicopter rudder composite material rib box craft parts: the wall thickness of the helicopter rudder composite material rib box craft parts is 2.5mm, and other dimensions are the same as those of the finished helicopter rudder composite material rib box;

[0037] 4. Pouring silicone rubber; the grade of pouring silicone rubber is RTV1502A;

[0038] 5. Curing: Carry out sil...

Embodiment 3

[0039] Embodiment 3, the length of the rib box to be formed is 400mm, the width is 180mm, the height is 80mm, and the wall thickness is 2.8mm.

[0040] 1. Manufacture the metal inner core: the distance between the lower surface of the metal inner core 4 and the upper surface of the rib box of the helicopter rudder composite material on the bottom plate 1 of the forming mold is t=7.5mm, and the side of the metal inner core 4 is composited with the helicopter rudder The distance between the side walls of the cavity of the material rib box is 7.5mm;

[0041] 2. Install the metal inner core;

[0042] 3. Paving and affixing helicopter rudder composite material rib box craft parts: the wall thickness of helicopter rudder composite material rib box craft parts is 3.8mm, and other dimensions are the same as those of the finished helicopter rudder composite material rib box;

[0043] 4. Pouring silicone rubber; the grade of pouring silicone rubber is R10301;

[0044] 5. Curing: Carry...

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Abstract

The invention belongs to the technical field of composite molding, and relates to the improvement for a core of a composite rib box molding mold of a helicopter rudder and a manufacturing method of the core. The core provided by the invention consists of a metal core (4) and a silicon rubber layer (11) wrapped on the side surfaces and the lower surface of the metal core (4). The manufacturing method of the core comprises the following steps: manufacturing the metal core; installing the metal core; laying a composite rib box process part of the helicopter rudder; pouring silicon rubber; and solidifying. According to the invention, the problem of the mutual interference between the core and a composite rib box blank of the helicopter rubber during the process of closing the mold is solved; a gap between the core and the composite rib box blank of the helicopter rubber can be well offset; therefore, displacement and wrinkle of a local laying layer are avoided, and the quality of the product is ensured.

Description

technical field [0001] The invention belongs to composite material forming technology, and relates to the improvement of the core in the rib box forming mold of the composite material of the helicopter rudder and the manufacturing method of the core. Background technique [0002] The structure of the composite material rib box on the upper part of the helicopter rudder trim see figure 1 , it is connected by rib frame 13 and box bottom 14, and the side wall height of rib frame 13 is identical, and the wall thickness of rib frame 13 and box bottom 14 is equal, and there is profile on the outer surface of rib frame 13. At present, the molding dies for forming the composite material rib box of the helicopter rudder refer to figure 2 , it consists of base plate 1, right half mold 2, left half mold 3, core and upper cover plate 5. The core and the upper cover plate 5 are connected as a whole by bolts 8 and two positioning pins 9. The right half mold 2 and the left half mold 3 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/76B29C33/38
Inventor 董克华
Owner 哈尔滨哈飞航空工业有限责任公司
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