CN113309773A - Connecting structure and connecting method for connecting composite material and metal - Google Patents
Connecting structure and connecting method for connecting composite material and metal Download PDFInfo
- Publication number
- CN113309773A CN113309773A CN202110699478.8A CN202110699478A CN113309773A CN 113309773 A CN113309773 A CN 113309773A CN 202110699478 A CN202110699478 A CN 202110699478A CN 113309773 A CN113309773 A CN 113309773A
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- Prior art keywords
- connecting piece
- bulge
- composite material
- mounting hole
- metal
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- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 239000002184 metal Substances 0.000 title claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000003292 glue Substances 0.000 claims description 11
- 150000002739 metals Chemical class 0.000 claims 4
- 238000004026 adhesive bonding Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000010008 shearing Methods 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
- F16B1/02—Means for securing elements of mechanisms after operation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
The invention provides a connecting structure and a connecting method for connecting a composite material and a metal, which belong to the technical field of composite material connection, and the connecting structure for connecting the composite material and the metal comprises the following steps: the first connecting piece is provided with a mounting hole; the second connecting piece is internally provided with a threaded hole; a first bulge and a second bulge are respectively arranged at two ends of the outer circumference of the second connecting piece; according to the connecting structure for connecting the composite material and the metal, the second protrusion with the larger diameter is arranged on the second connecting piece, and the second protrusion is glued with the surface of the first connecting piece, so that the gluing area between the first connecting piece and the second connecting piece is increased, the connecting strength between the first connecting piece and the second connecting piece is enhanced, and the connecting strength between the composite material and the metal is enhanced.
Description
Technical Field
The invention relates to the technical field of composite material connection, in particular to a connection structure and a connection method for connecting a composite material and metal.
Background
The carbon fiber resin matrix composite material takes resin as a matrix, and carbon fibers as a material of a reinforcing phase, and has the characteristics of light weight, high strength and good environmental adaptability, so that the carbon fiber resin matrix composite material is greatly applied to the fields of aerospace, ships, wind power, sports goods and the like.
When the composite material needs to be connected with other parts through the connecting bolt, a metal piece with a threaded hole needs to be fixed on the composite material, the connecting bolt is connected with the metal piece, and finally the composite material is connected with other parts.
The composite material and the metal piece are connected in a gluing mode, but the gluing strength is insufficient due to the fact that the gluing area is only the cross-sectional area and is far lower than the breaking strength of the composite material, and the connecting joint becomes a weak point of a composite material structure.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the composite material and the metal piece are connected in a gluing mode in the prior art, but the gluing strength is insufficient due to the fact that the gluing area is only the cross-sectional area, and the joint is far lower than the breaking strength of the composite material, so that the joint becomes a weak point of the composite material structure, and therefore, the connecting structure for connecting the composite material and the metal is provided.
The invention also provides a connecting method for connecting the composite material and the metal.
In order to solve the technical problem, the invention provides a connecting structure for connecting a composite material and a metal, which comprises:
the first connecting piece is provided with a mounting hole; the first connector is adapted to connect with a composite material;
the second connecting piece is internally provided with a threaded hole; a first bulge and a second bulge are respectively arranged at two ends of the outer circumference of the second connecting piece; the diameter of the first bulge is equal to the inner diameter of the mounting hole; the diameter of the second bulge is larger than that of the first bulge; one end of the second connecting piece, which is provided with the first bulge, is arranged in the mounting hole; the lower surface of the second bulge is attached to the surface of the first connecting piece; the second connecting piece is suitable for being connected with the metal component through a bolt.
As a preferred scheme, the first connecting piece is provided with an installation groove which is concentric with the installation hole; the diameter of the mounting groove is the same as that of the second bulge, and the depth of the mounting groove is larger than the thickness of the second bulge.
Preferably, a second gap is arranged at the end part of the second protrusion.
Preferably, the second gap has a plurality of gaps, and the gaps are uniformly arranged at the end part of the second protrusion at intervals.
Preferably, a first gap is arranged at the end of the first protrusion.
Preferably, the first gap has a plurality of gaps, and the gaps are uniformly arranged at the end part of the first bulge at intervals.
Preferably, the diameter of the first protrusion is 1-4mm larger than the diameter of the second connector.
The invention also provides a connecting method for connecting a composite material and a metal, comprising the following steps:
the first connecting piece is provided with a mounting hole;
a first bulge and a second bulge are arranged on the second connecting piece; the diameter of the first bulge is the same as that of the mounting hole;
mounting one end of the first bulge of the second connecting piece into the mounting hole of the first connecting piece; the outer edge of the first bulge is in contact with the inner wall of the mounting hole; the side surface of the second bulge close to the first bulge is attached to the surface of the first connecting piece;
glue is coated in the mounting hole, the surface of the second protrusion and the surface of the first connecting piece, and the first connecting piece and the second connecting piece are glued.
As a preferred scheme, an installation groove which is concentric with the installation hole is formed in the second connecting piece; the depth of the mounting groove is the sum of the thickness of the second protrusion and the thickness of the glue applying layer.
The technical scheme of the invention has the following advantages:
1. the invention provides a connecting structure for connecting a composite material and metal, which comprises a first connecting piece and a second connecting piece, wherein the first connecting piece is connected with the second connecting piece; the second protrusion with a larger diameter is arranged on the second connecting piece, and the second protrusion is bonded with the surface of the first connecting piece, so that the bonding area between the first connecting piece and the second connecting piece is increased, the connecting strength between the first connecting piece and the second connecting piece is enhanced, and the connecting strength between the composite material and the metal is enhanced;
the second connecting piece is designed to be in an I-shaped structure, and the long edge of the I shape (namely one end of the second protrusion) is attached to the surface of the first connecting piece, so that the deformation is resisted by the shearing performance of the structural adhesive when the first connecting piece is stretched in the vertical direction, the compression resistance of the first connecting piece is increased, and the tolerance strength of the composite material joint can be greatly improved.
2. According to the connecting structure for connecting the composite material and the metal, the first mounting piece is provided with the mounting groove; the protruding cementing of second is in the mounting groove for first connecting piece and second connecting piece surface parallel and level have maintained the good outward appearance of product.
3. According to the connecting structure for connecting the composite material and the metal, provided by the invention, a plurality of first gaps and second gaps are respectively arranged on the edges of the first bulge and the second bulge; the adhesive area is increased, the circumferential shearing strength is improved, and the second connecting piece can be prevented from rotating relative to the first connecting piece.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic perspective view of a connection structure according to the present invention.
Fig. 2 is a schematic perspective view of a second connecting member according to the present invention.
Fig. 3 is a sectional structural view of a second connecting member of the present invention.
Fig. 4 is a schematic perspective view of a first connecting member according to the present invention.
FIG. 5 is a structural schematic view of a gap of the present invention.
Fig. 6 is a data diagram of a connection method of the related art.
FIG. 7 is a test data diagram of the connection structure of the present invention.
Description of reference numerals:
1. a first connecting member; 2. a second connecting member; 3. mounting holes; 4. mounting grooves; 5. a first protrusion; 6. a second protrusion; 7. a first gap; 8. a second gap; 9. a threaded bore.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The structure for connecting a composite material and a metal provided by the embodiment, as shown in fig. 1, includes a first connecting member 1 and a second connecting member 2; the first connecting piece 1 is made of composite materials and can be integrally arranged with the composite materials to be connected, or the composite materials to be connected are the first connecting piece 1; the second connecting member 2 is made of a metal material and is provided with a threaded hole 9 inside, and a bolt can be connected with other metal parts through the threaded hole 9.
As shown in fig. 2 and 3, a first protrusion 5 and a second protrusion 6 are provided on the outer circumference of the second connector 2 in a ring shape, and the first protrusion 5 and the second protrusion 6 are provided at both ends of the second connector 2; the diameter of the second bulge 6 is larger than that of the first bulge 5;
as shown in fig. 4, a mounting hole 3 is formed in the first connecting member 1, and the inner diameter of the mounting hole 3 is equal to the outer diameter of the first protrusion 5; a mounting groove 4 is formed in one side face of the first connecting piece 1, the mounting groove 4 and the mounting hole 3 are concentrically arranged, and the diameter of a notch of the mounting groove 4 is larger than that of the mounting hole 3; the inner diameter of the mounting groove 4 is equal to the outer diameter of the second protrusion 6.
As shown in fig. 5, a first gap 7 is provided on the first protrusion 5, and the first gap 7 has a plurality of gaps, and is uniformly provided in the circumferential direction of the first protrusion 5; the second bulge 6 is provided with a plurality of second gaps 8, and the second gaps 8 are uniformly arranged along the circumferential direction of the second bulge 6.
When the connecting piece is installed and used, one end, provided with the first bulge 5, of the first connecting piece 1 is inserted into the installation hole 3, one side, close to the first bulge 5, of the second bulge 6 is arranged to be attached to the bottom of the installation groove 4, namely the second bulge 6 is embedded in the installation groove 4; when the fixed connection is required to be realized, glue is coated on the contact surface of the first connecting piece 1 and the second connecting piece 2, so that the first connecting piece 1 and the second connecting piece 2 are glued;
the depth of the mounting groove 4 is larger than the thickness of the second bulge 6; specifically, the depth of the mounting groove 4 is H, the thickness of the second protrusion 6 is D, and the thickness of the glue applying glue layer is L, so that H is equal to D + L; this way it is guaranteed that the surface of the first connecting piece 1 is flush, maintaining the good appearance of the product.
The setting of first opening 7 and second opening 8, when coating glue, glue soaks the inside of first opening 7 and second opening 8, has increased articulated area, and increase strength can prevent that first connecting piece 1 and second connecting piece 2 from taking place relative rotation simultaneously.
The second connecting piece 2 is designed to be in an I-shaped structure, and the long side of the I shape (namely one end of the second protrusion 6) is attached to the surface of the first connecting piece 1, so that the deformation is resisted by the shearing performance of the structural adhesive when the second connecting piece is stretched in the vertical direction, the compression resistance of the composite material base material is increased, and the tolerance strength of the composite material joint can be greatly improved, as shown in figure 6, the shearing strength value of the general structural adhesive is between 1 and 30MPa, and the maximum value is not more than 40MPa, and as shown in figure 7, the 90-degree compression strength after the connecting structure is adopted is between 100 and 600MPa, and the strength is more than 2 times of that of the structural adhesive.
Example 2
The connecting method for connecting the composite material and the metal comprises the following steps:
a mounting hole 3 and a mounting groove 4 which is concentric with the mounting hole 3 are arranged on the first connecting piece 1;
a first bulge 5 and a second bulge 6 are arranged on the second connecting piece 2; the diameter of the first protrusion 5 is the same as that of the mounting hole 3; the diameter of the second bulge 6 is the same as that of the notch of the mounting groove 4;
one end of the first projection 5 of the second connecting piece 2 is installed in the installation hole 3 of the first connecting piece 1; the outer edge of the first protrusion 5 is in contact with the inner wall of the mounting hole 3; the side surface of the second protrusion 6 close to the first protrusion 5 is attached to the surface of the first connecting piece 1;
glue is coated in the mounting hole 3, on the surface of the second protrusion 6 and on the surface of the first connecting piece 1, so that the first connecting piece 1 and the second connecting piece 2 are glued; the depth of the mounting groove 4 is the sum of the thickness of the second protrusion 6 and the thickness of the glue applying layer.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. A connecting structure for connecting a composite material to a metal, comprising:
the first connecting piece (1) is provided with a mounting hole (3); the first connecting piece (1) is suitable for being connected with a composite material;
a second connecting piece (2) with a threaded hole (9) inside; a first bulge (5) and a second bulge (6) are respectively arranged at two ends of the outer circumference of the second connecting piece (2); the diameter of the first bulge (5) is equal to the inner diameter of the mounting hole (3); the diameter of the second bulge (6) is larger than that of the first bulge (5); one end of the second connecting piece (2) provided with the first bulge (5) is arranged in the mounting hole (3); the lower surface of the second bulge (6) is attached to the surface of the first connecting piece (1); the second connecting piece (2) is suitable for being connected with the metal component through a bolt.
2. The connecting structure for connecting a composite material and a metal according to claim 1, wherein the first connecting member (1) is provided with a mounting groove (4) concentrically arranged with the mounting hole (3); the diameter of the mounting groove (4) is the same as that of the second bulge (6), and the depth of the mounting groove is larger than the thickness of the second bulge (6).
3. Connection structure for connecting composite materials to metals according to claim 2, characterized in that the end of the second projection (6) is provided with a second notch (8).
4. A connection structure for connecting composite materials to metals according to claim 3, characterized in that said second breach (8) has a plurality of slits, evenly spaced at the end of said second projection (6).
5. A connection arrangement for connecting composite material to metal according to any one of claims 1-4, characterised in that the end of the first projection (5) is provided with a first gap (7).
6. A connection structure for connecting composite materials to metals according to claim 5, characterized in that said first breach (7) has a plurality of openings, evenly spaced at the end of said first projection (5).
7. Connection structure for connecting composite materials to metals according to claim 6, characterized in that the diameter of the first projection (5) is 1-4mm greater than the diameter of the second connection piece (2).
8. A joining method for joining a composite material to a metal, comprising the steps of:
a mounting hole (3) is formed in the first connecting piece (1);
a first bulge (5) and a second bulge (6) are arranged on the second connecting piece (2); the diameter of the first bulge (5) is the same as that of the mounting hole (3);
one end of a first bulge (5) of the second connecting piece (2) is arranged in the mounting hole (3) of the first connecting piece (1); the outer edge of the first bulge (5) is in contact with the inner wall of the mounting hole (3); the side surface of the second protrusion (6) close to the first protrusion (5) is attached to the surface of the first connecting piece (1);
glue is coated in the mounting hole (3), on the surface of the second protrusion (6) and on the surface of the first connecting piece (1), so that the first connecting piece (1) and the second connecting piece (2) are glued.
9. The connection method for connecting a composite material and a metal according to claim 8, wherein a mounting groove (4) concentrically disposed with the mounting hole (3) is formed on the second connection member (2); the depth of the mounting groove (4) is the sum of the thickness of the second protrusion (6) and the thickness of the glue applying layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110699478.8A CN113309773A (en) | 2021-06-23 | 2021-06-23 | Connecting structure and connecting method for connecting composite material and metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110699478.8A CN113309773A (en) | 2021-06-23 | 2021-06-23 | Connecting structure and connecting method for connecting composite material and metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113309773A true CN113309773A (en) | 2021-08-27 |
Family
ID=77380261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110699478.8A Withdrawn CN113309773A (en) | 2021-06-23 | 2021-06-23 | Connecting structure and connecting method for connecting composite material and metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113309773A (en) |
-
2021
- 2021-06-23 CN CN202110699478.8A patent/CN113309773A/en not_active Withdrawn
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Application publication date: 20210827 |
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| WW01 | Invention patent application withdrawn after publication |