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Positioning and punching method for composite material honeycomb sandwich part packing area

A technology of honeycomb interlayer and composite material, which is applied in the field of positioning and punching in the filling area of ​​composite honeycomb interlayer parts, can solve problems such as positioning deviation, and achieve the effect of improving position accuracy, reducing rework and repair rate, and reducing positioning difficulty.

Inactive Publication Date: 2018-05-25
JIANGXI CHANGHE AVIATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the process method is positioning by drawing lines, it is easy to cause positioning deviation, resulting in the need to rework and fill the parts after drilling

Method used

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  • Positioning and punching method for composite material honeycomb sandwich part packing area
  • Positioning and punching method for composite material honeycomb sandwich part packing area

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Embodiment Construction

[0009] A positioning drilling method for the filling area of ​​a composite honeycomb sandwich part, which is used to process a through hole with a diameter less than Φ50mm in the filling area. The method is provided with a tapered pin 2 at the theoretical drilling position of the tooling 1 and only the tapered pin is exposed. part, pave the mold surface prepreg 3 on the surface of the tooling 1, and then cut the raised mold surface prepreg 3 according to the tapered part; place the honeycomb interlayer 4, and use the tapered The part is filled with filler in the center, and its range is larger than the diameter of the through hole; laying the prepreg 5 on the non-mold surface, transferring it as a whole and curing it under heat and pressure; after the part is demoulded, drill according to the tapered hole formed at the bottom hole. The included angle at the top of the tapered pin 2 is 90 degrees.

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Abstract

The invention belongs to the field of aviation composite material part manufacturing, and particularly relates to a positioning and punching method for a composite material honeycomb sandwich part packing area. The size of small-diameter through holes, part of a composite honeycomb sandwich part, is 50 mm or less, a line drawing positioning is easy to be caused positioning deviation, so that a filling padding needs to be reworked after the part is drilled. According to the positioning and punching method for the composite material honeycomb sandwich part packing area, a conical pin is arrangedat the theoretical punching position of a tool, and only the conical part is exposed, and a veneering surface prepreg is laid on a molded surface of the tool, and then the convex veneering surface prepreg is cut off according to the conical part; a honeycomb sandwich layer is placed, and a packing is filled with the conical part as a center; a non-veneering surface prepreg is laid, the whole transfer is carried out, heating and pressurization solidification are carried out; and drilling is carried out according to conical holes formed in the bottom. The positioning difficulty of the packing area in the part manufacturing process is reduced, the position precision of the packing area is improved, the reworking repair rate is reduced, and the product quality is improved.

Description

technical field [0001] The invention belongs to the field of aviation composite material parts manufacturing, and in particular relates to a method for positioning and punching a filling area of ​​a composite material honeycomb sandwich part. Background technique [0002] For some composite honeycomb sandwich parts, the small-diameter through-hole size is less than Φ50mm, and such filling areas need to be filled during the part lay-up process. Since the process method is positioning by drawing lines, it is easy to cause positioning deviation, resulting in the need to rework and fill the parts after drilling. Contents of the invention [0003] In the invention, the tapered positioning pins protruding from the surface of the tooling are added to the part forming tooling, so that the filling area can be accurately positioned when the layering process is completed. [0004] The positioning and punching method of the filling area of ​​the composite material honeycomb sandwich ...

Claims

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Application Information

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IPC IPC(8): B29C70/30B29C70/54B29L31/60
CPCB29C70/30B29C70/541B29C70/545B29L2031/608
Inventor 陈晨管海新徐大鹏丁奇锋李锦李伟钟景兴谈健刘望子
Owner JIANGXI CHANGHE AVIATION IND
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