Method for making high-precision qualified holes in composite sandwich by hand
A composite material, high-precision technology, applied in the field of drilling, can solve the problems of composite material hole splitting, exit delamination, centering instability, etc., to achieve the effect of improving accuracy and quality, reducing demand, and reducing localization
Inactive Publication Date: 2018-11-27
AVIC SAC COMML AIRCRAFT
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Problems solved by technology
[0002] In the production and assembly of civil aircraft companies, more and more composite material assembly technologies are used. When the assembly site often encounters the need to manually make composite interlayer holes, twist drills and four straight groove drills are generally used for drilling. , but both have certain limitations. When the four straight flute drills are used to make holes, there is no splitting at the entrance and exit of the hole, and the quality is excellent. Unstable centering leads to low hole making accuracy, and it is easy to make large holes or oval holes, and it can only be used for making holes between composite materials and composite materials. When making composite materials and metal interlayer holes, four straight groove drills The problem of the main cutting edge is that metal materials cannot be drilled. The stability of the holes made by twist drills is good. Due to the characteristics of fast wear of the drill points, it is easy to cause splits around the composite holes, and even delamination at the exit, which cannot meet the manufacturing accuracy of qualified holes.
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[0013] Such as figure 1 with figure 2 Shown, a kind of method of hand-made composite material interlayer high-precision qualified hole, the steps are as follows: 1, make the initial hole: use ordinary high-speed steel twist drill to make the initial hole 3.2mm; 2 reaming: band diamond-coated hard alloy Four straight groove drills for reaming; 3 reaming: the drilling accuracy of the reamer is 0-0.02mm.
[0014] The structure of the four straight groove drill in step 2 is as follows: one end of the handle 1 is connected with a cutting edge 2, the other end of the cutting edge 2 is provided with a guide post I3, and the connecting end between the handle 1 and the cutting edge 2 is a plane.
[0015] The front end of the reamer described in step 3 is provided with a guide post II4.
[0016] The diameter of the guide post I3 is 3.2 mm, and the length of the guide post I3 is 8 mm.
[0017] The diameter of the guide post II4 is 4.1mm-6.25mm, and the length of the guide post II4 is...
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Abstract
The invention relates to a method for manually manufacturing a composite sandwich high-precision qualified hole, which improves the manufacturing accuracy of the hole and reduces the cost by making aninitial hole, reaming and reaming, respectively using a twist drill, a four-straight groove drill and a reamer, and cooperating with the four-straight groove drill and the reamer.
Description
technical field [0001] The invention relates to a drilling method, in particular to a method for manually manufacturing high-precision qualified holes in composite material interlayers. Background technique [0002] In the production and assembly of civil aircraft companies, more and more composite material assembly technologies are used. When the assembly site often encounters the need to manually make composite interlayer holes, twist drills and four straight groove drills are generally used for drilling. , but both have certain limitations. When the four straight flute drills are used to make holes, there is no splitting at the entrance and exit of the hole, and the quality is excellent. Unstable centering leads to low hole making accuracy, and it is easy to make large holes or oval holes, and it can only be used for making holes between composite materials and composite materials. When making composite materials and metal interlayer holes, four straight groove drills Th...
Claims
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IPC IPC(8): B23P13/02
CPCB23P13/02
Inventor 马瑞麟孟凡波贾景超李灵子刘岩隆
Owner AVIC SAC COMML AIRCRAFT