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Hole machining method of reinforced resin matrix composite prepreg of fiber fabric

A fiber-reinforced resin and composite material technology, which is applied in the field of hole processing of fiber-reinforced resin-based composite material prepregs, can solve the problems of strong equipment dependence, low dimensional accuracy, and low production efficiency, and improve the drilling process , Reduce the thickness of the hole wall, the effect of high production efficiency

Active Publication Date: 2012-03-21
BEIJING HANGTIAN XINFENG MECHANICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a new hole processing method for fiber-reinforced resin-based composite material prepreg, which solves the problems of low production efficiency and poor hole wall quality existing in the drilling of fiber-reinforced resin-based composite material prepreg by using the freezing process , low dimensional accuracy, strong dependence on equipment, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] Example 1: Carbon fiber / Shuangma resin——T700 / QY8911 prepreg drilling φ50 hole.

[0014] In the first step, after cutting the fiber-reinforced resin-based composite material prepreg, laying and flattening, the lay-up thickness is 18mm;

[0015] The second step is to wrap it with polyethylene film and seal it with tape;

[0016] The third step is to put the wrapped prepreg blank into a low-temperature storage box and freeze it to between -22°C and -24°C for 16 hours;

[0017] The fourth step is to take out the frozen blank from the low-temperature storage box, mark the drilling position with a needle, and cut off and peel off the plastic film in the φ60 area around the mark;

[0018] The fifth step is to drill holes with a φ50 hole opener. The hole opener must be cleaned with acetone and dried before cutting;

[0019] The sixth step, after drilling, seal the hole on the plastic film with adhesive tape.

[0020] The seventh step is to place the prepreg blank at room tem...

example 2

[0022] Example 2: Glass fiber / phenolic resin——SW180D / B30 prepreg drilling φ3 hole.

[0023] In the first step, after cutting the fiber-reinforced resin-based composite material prepreg, laying and flattening, the laying thickness is 20mm;

[0024] The second step is to wrap it with polyethylene film and seal it with tape;

[0025] The third step is to put the wrapped prepreg blank into the low temperature storage box and freeze it to -16℃~-18℃ for 10 hours;

[0026] The fourth step is to take out the frozen blank from the cryogenic storage box, mark the drilling position with a needle, and cut off and peel off the plastic film in the φ6 area around the mark;

[0027] The fifth step is to drill with a φ3 ordinary straight shank high-speed steel twist drill. The drill must be cleaned and dried with acetone before cutting;

[0028] The sixth step, after drilling, seal the hole on the plastic film with adhesive tape.

[0029] The seventh step is to place the prepreg blank at ro...

example 3

[0031] Example 3: High silica fiber / phenolic resin——BWT260 / B30 prepreg drilling φ10 hole.

[0032] In the first step, after cutting the fiber-reinforced resin-based composite material prepreg, laying and flattening, the laying thickness is 15mm;

[0033] The second step is to wrap it with polyethylene film and seal it with tape;

[0034] The third step is to put the wrapped prepreg blank into the low temperature storage box and freeze it to -20℃~-23℃ for 10 hours;

[0035] The fourth step is to take out the frozen blank from the cryogenic storage box, mark the drilling position with a needle, and cut off and peel off the plastic film in the φ14 area around the mark;

[0036] The fifth step is to drill with a φ10 three-pointed and seven-edged thin plate group drill bit. The drill bit must be cleaned and dried with acetone before cutting;

[0037] The sixth step, after drilling, seal the hole on the plastic film with adhesive tape.

[0038] The seventh step is to place the pr...

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Abstract

The invention provides a hole machining method of a reinforced resin matrix composite prepreg of fiber fabric, specifically comprising the steps of: after cutting the reinforced resin composite prepreg of fiber fabric, laminating and flattening the reinforced resin composite prepreg of fiber fabric; after packaging a plastic thin film, freezing wrapped prepreg blank at temperature between -14 DEG C to -24 DEG C; and drilling holes on the prepreg blank laminated by a thin plate drill or a hole opener. The invention improves the hole drilling manufacturability of the prepreg, reduces the roughness of hole wall, enhances the precision of machining size (to IT9) without deficiencies such as overlaps and burrs on the hole wall and the like, improves the production efficiency and lowers the rejection rate without special devices.

Description

technical field [0001] The invention belongs to the field of preparation of fiber fabric-reinforced resin-based composite materials, and in particular relates to a hole processing method for fiber-reinforced resin-based composite material prepregs. Background technique [0002] At present, there are three main hole processing methods for fiber-reinforced resin-based composite material prepregs: 1. Manual hole cutting. Use other tools to cut out the shape of the hole according to the line. 2. The cutting machine cuts holes, using a mechanical prepreg cutting machine to cut holes on the prepreg with a pointed cutter. 3. Laser cutting holes, using a special laser cutting machine or a laser blanking machine to cut holes on the prepreg. The main disadvantages of the above methods are: the processing thickness is relatively thin, manual cutting and cutting machine cutting can only be processed in a single layer, the processing thickness is less than 0.3mm, and the thickness of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26F1/16
Inventor 刘漪涛王和峰
Owner BEIJING HANGTIAN XINFENG MECHANICAL EQUIP
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