Hole machining method of reinforced resin matrix composite prepreg of fiber fabric
A fiber-reinforced resin and composite material technology is applied in the field of hole processing of fiber-reinforced resin-based composite material prepregs, which can solve the problems of strong equipment dependence, low production efficiency, and poor hole wall quality, and improve the drilling process. The effect of high productivity, high production efficiency and low scrap rate
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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 it at room temperature until ...
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 it at room temperature ...
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 it at ...
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