Hole making method of thin-walled honeycomb sandwich composite structural member
A technology of composite materials and structural parts, used in household components, other household appliances, household appliances, etc., can solve the problems of softening of the pore wall, affecting the connection strength, splitting of the composite honeycomb sandwich layer, etc. Effect
Active Publication Date: 2013-03-06
CHENGDU AIRCRAFT INDUSTRY GROUP
View PDF3 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to solve the problem that the composite material honeycomb sandwich layer is prone to cracking or hole wall softening in the existing process of drilling through holes and countersinking tapered countersink holes, which affects the connection strength, the invention provides a thin-walled honeycomb sandwich Hole-making method for composite structural parts
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0009] figure 1 A schematic diagram of an embodiment of the hole-making method of the thin-walled honeycomb sandwich composite material structure of the present invention is shown. The upper and lower surfaces of composite structural parts have one or more layers of glass cloth prepreg or carbon cloth prepreg 1, and a honeycomb sandwich layer 2 is arranged in the middle, which is prone to glass cloth prepreg in the process of hole making and spot facing Material or carbon cloth prepreg 1 splitting or composite honeycomb sandwich layer 2 hole wall softening phenomenon, affecting the connection strength. The hole-making method of the thin-walled honeycomb sandwich composite material structure of the present invention is characterized in that it comprises the following steps: making the through-hole 4 according to the diameter of the initial hole and countersinking at one end of the through-hole 4 according to the corresponding head-shaped taper of the countersunk bolt Conical c...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a hole making method of a thin-walled honeycomb sandwich composite structural member, which comprises the following steps that a through hole (4) is made formed according to the size of the diameter of a primary hole, a tapered dimple hole is reamed at one end of the through hole (4) according to the corresponding head type taper of a countersunk bolt, and the diameter of the primary hole is valued according to a formula phi1 = phi (1 + C%); an orifice at the other end of the through hole (4) is plugged, and the through hole and the tapered dimple hole are filled by a fast curing adhesive (3); and after the fast curing glue (3) is cured, adhesive tape paper for plugging is torn away, a through hole (4) is formed made at a position of the original through hole (4) according to the size of diameter of a final hole, and a tapered dimple hole is reamed at one end of the through hole (4) according to the corresponding head type taper of the countersunk bolt. According to the secondary hole making method, the accurate size of the final hole can be obtained, and the strength of a honeycomb sandwich is enhanced by the cured adhesive liquid, so that the problem of splitting or hole wall softening in the hole making process are avoided, and the connecting strength of the thin-walled honeycomb sandwich composite structural member is enhanced.
Description
technical field [0001] The invention relates to a hole-making method for a thin-walled honeycomb sandwich composite material structure, in particular to a method for manufacturing a through hole on a thin-wall honeycomb sandwich composite material structure. Background technique [0002] When composite structural parts are connected to each other, countersunk bolts are often used for smooth surfaces. Since composite structural parts usually adopt a honeycomb sandwich structure, that is, the upper and lower surfaces of the parts have one or more layers of glass cloth prepreg. material or carbon cloth prepreg, with a honeycomb sandwich layer in the middle, so the depth of the conical spot facing hole on this thin-walled honeycomb sandwich composite structure often exceeds that of glass cloth prepreg or carbon cloth prepreg. The thickness of the impregnated material reaches the honeycomb sandwich layer, and at the same time, the drilled bolt connection holes also pass through t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/54B29L31/60
Inventor 薛荣李建川彭建
Owner CHENGDU AIRCRAFT INDUSTRY GROUP