CN114370333B - Ceramic matrix composite material component with metal connecting piece and preparation method thereof - Google Patents
Ceramic matrix composite material component with metal connecting piece and preparation method thereof Download PDFInfo
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- CN114370333B CN114370333B CN202111642777.4A CN202111642777A CN114370333B CN 114370333 B CN114370333 B CN 114370333B CN 202111642777 A CN202111642777 A CN 202111642777A CN 114370333 B CN114370333 B CN 114370333B
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- 239000011153 ceramic matrix composite Substances 0.000 title claims abstract description 91
- 239000002184 metal Substances 0.000 title claims abstract description 87
- 239000000463 material Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000007769 metal material Substances 0.000 claims abstract description 11
- 239000002131 composite material Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 5
- 239000003292 glue Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
Abstract
The invention relates to a ceramic matrix composite component with a metal connecting piece and a preparation method thereof, and aims to solve the technical problems that the connecting position of the existing ceramic matrix composite component and the metal material component such as an aircraft engine can deform, crack and even break away in a high-temperature and vibration environment. In the ceramic matrix composite component, the ceramic matrix composite body comprises a first connecting end provided with K connecting holes, K is more than or equal to 2 and is an integer, the metal connecting piece comprises a second connecting end matched and tightly attached to the first connecting end, the second connecting end is provided with K positioning holes, the positioning holes are fixedly connected with the connecting holes, M gaps are uniformly arranged among the positioning holes, and M is less than or equal to K. The preparation method comprises the steps of 1, determining each processing parameter of the ceramic matrix composite material member; 2. processing the ceramic matrix composite body and the metal connecting piece according to the processing parameters; 3. and assembling the processed ceramic matrix composite material body and the metal connecting piece.
Description
Technical Field
The invention relates to a method for connecting a ceramic matrix composite material member and a metal part, in particular to a ceramic matrix composite material member with a metal connecting piece and a preparation method thereof.
Background
In order to improve the high temperature resistance of an aircraft engine, a ceramic matrix composite is adopted to prepare an engine hot end part of a full composite, a ceramic matrix composite component is inevitably required to be connected, lapped and the like with a metal material part in an engine system, because the thermal expansion coefficient of the metal material is larger than that of the ceramic matrix composite, engine parts can be damaged at high temperature, and in addition, in a periodic vibration environment, the ceramic matrix composite formed by multiple layers of carbon felts is easy to separate from a paving layer at a bent part.
Chinese patent publication No. CN105948825A discloses a ceramic composite layer for brazing and a method for manufacturing the same, in which a metalized layer is provided on a surface of a ceramic substrate, and a solder layer formed by printing and sintering is provided on the metalized layer for brazing, but the ceramic composite material formed by the soldered layer and a carbon felt may be detached due to the vibration environment of the components.
The Chinese patent with publication number CN110293491A discloses a static bonding tool and a static bonding method for a ceramic-based composite cover body and a metal embedded ring, and the method adopts the static bonding tool method, so that the process stress can be reduced to the maximum extent, but the deformation and the cracks generated by bonding the ceramic-based composite cover body and the metal embedded ring under the severe vibration environment cannot be avoided.
In view of the above, there is a need for a way to securely connect a component made of a ceramic matrix composite material to a component made of a metal material.
Disclosure of Invention
The invention aims to solve the technical problems that the connecting position of the existing connecting mode of the ceramic matrix composite material member and metal material members such as aircraft engines and the like can generate deformation, cracks and even separation under high temperature and vibration environments, and provides a ceramic matrix composite material member with a metal connecting piece and a preparation method thereof.
The technical scheme of the invention is as follows:
the ceramic matrix composite material component with the metal connecting piece is characterized in that:
comprises a ceramic matrix composite material body and a metal connecting piece;
the ceramic matrix composite body comprises a first connecting end which is a curved surface connecting end,
the first connecting end is provided with K connecting holes, and K is an integer greater than or equal to 2;
the metal connecting piece comprises a second connecting end which is matched and tightly attached with the first connecting end;
the second connecting end is provided with K positioning holes corresponding to the connecting holes, the positioning holes are connected with the connecting holes through rivets, M notches are uniformly arranged between the positioning holes, M is not more than K and is a positive integer, and each notch consists of a rectangular notch and a circular notch communicated with the rectangular notch.
Furthermore, the positioning holes comprise circular positioning holes and oval positioning holes, the oval positioning holes are formed in the two sides of the notch, and the circular positioning holes are formed in the middle of the oval positioning holes.
Furthermore, the major diameter of the oval positioning hole is arranged along the extension direction of the curved surface of the first connecting end, and the minor diameter is perpendicular to the major diameter direction.
Further, the ceramic matrix composite body is cylindrical, and the metal connecting piece is in a ring shape matched with the ceramic matrix composite body.
Furthermore, the outer side surface of the metal connecting piece is arranged to be of an annular step structure, the second connecting end is matched with the spigot of the first connecting end, and the second connecting end is located on the inner side of the first connecting end;
evenly be provided with M sealed boss on the terminal surface of the first link of ceramic matrix composite structure, the second link of metal connecting piece be provided with the recess of sealed boss looks adaptation, circular breach sets up the internal face of recess, sealed boss covers circular breach completely.
Further, the width of the rectangular notch is calculated according to the following formula:
b＝(α 1 -α 2 )×L 1 ×T×1.5×10 -6
the diameter of the circular notch is calculated according to the following formula:
d 1 ≥b×2
wherein b is the width of the rectangular notch, d 1 Is the diameter of the circular gap, L 1 Is twoArc length between rectangular notches, alpha 1 Is the coefficient of thermal expansion, alpha, of a metallic material 2 T is the thermal expansion coefficient of the ceramic matrix composite material and the temperature in the use state.
Further, the major diameter of the oval positioning hole is calculated according to the following formula:
wherein, C 2 Is the major diameter, L, of the oval positioning hole 2 Is the arc length between two oval positioning holes, d 2 Is the rivet diameter;
the minor diameter of the oval positioning hole and the diameter d of the rivet 2 The same;
the diameter of the circular positioning hole is calculated according to the following formula:
d 3 ≥b×2.5
wherein d is 3 The diameter of the circular positioning hole.
Further, the number of the connection holes needs to satisfy the following formula at the same time,
Wherein K is the number of the connecting holes, L is the total arc length of the first connecting end of the ceramic matrix composite body, D is the arc length between adjacent rivets, the range of the arc length D between the adjacent rivets is 15-50mm, F is the required total connecting strength 1 The joint strength of a single rivet.
Furthermore, the rivet is a metal rivet or a composite material rivet, the diameter range of the metal rivet is 2-6 mm, and the diameter of the composite material rivet is 3-12 mm.
The invention relates to a preparation method of a ceramic matrix composite component with a metal connecting piece, which is characterized by comprising the following steps:
s1, determining various processing parameters of the ceramic matrix composite body and the metal connecting piece
S1.1, determining the number of connecting holes:
and simultaneously calculating the number of the connecting holes according to the following formula:
Wherein K is the number of the connecting holes, L is the total arc length of the first connecting end of the ceramic matrix composite body, D is the arc length between adjacent rivets, the range of the arc length D between the adjacent rivets is 15-50mm, F is the required total connecting strength 1 The connection strength of a single rivet;
the rivet is a metal rivet or a composite material rivet, the diameter range of the metal rivet is 2-6 mm, and the diameter of the composite material rivet is 3-12 mm;
s1.2, determining the sizes of a rectangular notch and a circular notch on the metal connecting piece:
the width of the rectangular notch is calculated according to the following formula:
b＝(α 1 -α 2 )×L 1 ×T×1.5×10 -6
calculating the diameter of the circular notch according to the formula d1 which is not less than bx 2;
wherein b is the width of the rectangular notch, d 1 Is the diameter of the circular gap, L 1 Is the arc length between two rectangular notches, alpha 1 Is the coefficient of thermal expansion, alpha, of a metallic material 2 The coefficient of thermal expansion of the ceramic matrix composite material, T is the temperature in the use state;
s1.3, determining the major diameter and the minor diameter of the oval positioning hole: according to the formula
Calculating the major diameter of the elliptical positioning hole, wherein C 2 Is the major diameter, L, of the oval positioning hole 2 Is the arc length between two oval positioning holes, d 2 Is the rivet diameter;
minor diameter C of oval positioning hole 1 Diameter d of rivet 2 The same;
s1.4, determining the diameter of the circular positioning hole, and calculating the diameter of the circular positioning hole according to the following formula:
d 3 ≥b×2.5
wherein d is 3 The diameter of the circular positioning hole;
s2, machining the ceramic matrix composite body and the metal connecting piece according to the machining parameters determined in the step S1;
and S3, assembling the processed ceramic matrix composite body and the metal connecting piece to obtain the ceramic matrix composite member with the metal connecting piece.
The invention has the beneficial effects that:
1. according to the invention, the metal connecting piece is fixedly connected to one end of the ceramic matrix composite body, and then the ceramic matrix composite body is connected with the metal components such as the aircraft engine and the like through the metal connecting piece, so that the ceramic matrix composite body and the metal components are prevented from being directly connected to each other and deforming, cracking and falling off in a strong vibration use scene, and the connection quality is ensured.
2. By arranging the rectangular notch and the circular notch on the metal connecting piece, the problems of damage between parts and separation between paving layers in a vibration environment caused by different thermal expansion coefficients are solved, and the weight of the whole device is reduced.
3. The preparation method provided by the invention is simple in process and convenient to operate, reduces the deformation and cracks of the connecting parts caused by other factors, and reduces the separation of the ceramic matrix composite material pavements caused by vibration, ensures the connecting quality, and also reduces the weight of the whole device.
Drawings
FIG. 1 is a schematic view of a ceramic matrix composite component with a metal connection according to an embodiment of the present invention;
FIG. 2 is a schematic view of a ceramic matrix composite body according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a metal connecting member according to an embodiment of the present invention.
The reference numbers are as follows:
1-ceramic matrix composite body, 11-connecting hole, 12-sealing boss, 2-metal connecting piece, 21-round positioning hole, 22-oval positioning hole, 23-rectangular notch, 24-round notch, 25-groove and 3-rivet.
Detailed Description
Referring to FIG. 1, the present embodiment provides a ceramic matrix composite structure with a metal connecting member, where the ceramic matrix composite structure includes a ceramic matrix composite body 1 and a metal connecting member 2, and after a turning point of a low temperature end of the ceramic matrix composite body 1 is connected to the metal connecting member 2, the metal connecting member 2 is connected to a metal structure requiring the ceramic matrix composite body 1, so as to connect the ceramic matrix composite body 1 to the metal structure.
Referring to fig. 2, the ceramic matrix composite body 1 includes a first connection end, the first connection end is a curved connection end, in this embodiment, the ceramic matrix composite body 1 is cylindrical, the first connection end is a torus connection end, the first connection end is provided with K connection holes 11, K is an integer greater than or equal to 2.
Referring to fig. 3, the metal connector 2 includes a second connection end corresponding to the ceramic matrix composite body 1, in this embodiment, the second connection end of the metal connector 2 is annular, the second connection end is provided with K positioning holes corresponding to the connection holes 11, the positioning holes are connected to the connection holes 11 through rivets 3, the positioning holes include circular positioning holes 21 and oval positioning holes 22, a major diameter of each oval positioning hole 22 is arranged along an extending direction of a curved surface of the first connection end, and a minor diameter is perpendicular to the major diameter; in this embodiment, two oval positioning holes 22 and one round positioning hole 21 disposed between the two oval positioning holes 22 are in a group, a gap is disposed between two adjacent groups, the gap is a rectangular gap 25 and a round gap 24 communicated with the rectangular gap 25, the two oval positioning holes 22 are disposed on two sides of the gap, in this arrangement, the rectangular gap 25 and the round gap 24 can compensate deformation of the metal connector 2 in a high temperature environment, and the two oval positioning holes 22 are used for compensating metal thermal deformation in the group, so as to eliminate thermal stress caused by the inconsistency of thermal expansion coefficients of the two materials.
The rivet 3 can be a metal rivet or a composite material rivet, the diameter range of the metal rivet is 2-6 mm, and the diameter of the composite material rivet is 3-12 mm. Specifically, when the metal rivet is used, the metal rivet directly penetrates through the connecting hole 11 and the positioning hole to be riveted; when the composite rivet is used, the high-temperature glue is required to be firstly used for coating the outer side face of the composite rivet, the composite rivet coated with the high-temperature glue penetrates through the connecting hole 11 and the positioning hole to be riveted, the riveted ceramic matrix composite member is placed at the room temperature until the high-temperature glue is solidified, and the stability of the ceramic matrix composite member is further improved.
The outer side surface of the metal connecting piece 2 is arranged to be of an annular step structure, the second connecting end is matched with the spigot of the first connecting end, and the second connecting end is positioned on the inner side of the first connecting end; the end face of the first connecting end is evenly provided with K/3 sealing bosses 12, the second connecting end is further provided with grooves 25 corresponding to the sealing bosses 12, the sealing bosses 12 are matched with the grooves 25 in shape and size, circular notches 24 are formed in the inner side faces of the grooves 25, the second connecting end of the metal connecting piece 2 is located on the inner side of the first connecting end of the ceramic matrix composite body 1 and is tightly attached to the first connecting end, and the sealing bosses 12 completely cover the circular notches 24. It can be understood that, the metal connecting member 2 is disposed at the position of the ceramic matrix composite body 1 in actual use, and the connecting position of the ceramic matrix composite body 1 and the metal member is related, taking the cylindrical ceramic matrix composite body 1 as an example in this embodiment, in actual use, if the outer side surface of the connecting end of the cylindrical ceramic matrix composite body 1 is connected with the metal member, the metal connecting member 2 is disposed at the outer side of the ceramic matrix composite body 1; if the inner surface of the connection end of the cylindrical ceramic matrix composite body 1 is in contact with a metal member, the metal joint 2 is disposed inside the ceramic matrix composite body 1.
The number of the coupling holes 11 should satisfy the following formula at the same time,
Wherein K is the number of the connecting holes 11, L is the total arc length of the first connecting end of the ceramic matrix composite body 1, D is the arc length between adjacent rivets 3, the range of the arc length D between the adjacent rivets 3 is 15-50mm, F is the required total connecting strength 1 The connection strength of the single rivet 3; the K value can be adjusted to satisfy both of the above equations by adjusting the arc length between adjacent rivets 3 and selecting a rivet 3 of an appropriate diameter.
A plurality of gaps are uniformly arranged among the positioning holes, and each gap consists of a rectangular gap 25 and a round gap 24 communicated with the rectangular gap 25; the width of the rectangular notch 25 is calculated according to the following formula:
b＝(α 1 -α 2 )×L 1 ×T×1.5×10 -6
the diameter of the circular indentation 24 is calculated according to the following formula:
d 1 ≥b×2
wherein b is the width of the rectangular notch 25 and d 1 Is the diameter, L, of the circular gap 24 1 Is the arc length between two rectangular notches 25, alpha 1 Is the coefficient of thermal expansion, alpha, of a metallic material 2 T is the thermal expansion coefficient of the ceramic matrix composite material and the temperature in the use state.
The positioning holes include an elliptical positioning hole 22 and a circular positioning hole 21, and the major diameter of the elliptical positioning hole 22 is calculated according to the following formula:
wherein, C 2 Is the major diameter, L, of the oval positioning hole 22 2 Is the arc length between two oval positioning holes 22, d 2 The diameter of the rivet 3;
the minor diameter of the oval positioning hole 22 and the diameter d of the rivet 3 2 The same;
the diameter of the circular positioning hole 21 is calculated according to the following formula:
d 3 ≥b×2.5
wherein d is 3 The diameter of the circular positioning hole 21.
The present application provides a method for preparing the ceramic matrix composite component with the metal connector, comprising the following steps:
s1, determining various processing parameters of a ceramic matrix composite material body 1 and a metal connecting piece 2; because the service environment of the whole ceramic matrix composite body 1 and the metal connecting piece 2 is more than 900 ℃, the high-temperature alloy material with mature technology is generally selected, and the thermal expansion coefficient of the high-temperature alloy material within the range of 0-900 ℃ is generally as follows: 11.8X 10 -6 ～18.7×10 -6 /℃。
S1.1 determines the number of connection holes 11: according to the formula
Calculating the number of the connecting holes 11, wherein K is the number of the connecting holes 11, L is the total arc length of the first connecting end of the ceramic matrix composite body 1, D is the arc length between adjacent rivets 3, the range of the arc length D between the adjacent rivets 3 is 15-50mm, F is the required total connecting strength, and F is 1 The connection strength of the single rivet 3;
the rivet 3 is a metal rivet or a composite material rivet, the diameter range of the metal rivet is 2-6 mm, and the diameter of the composite material rivet is 3-12 mm;
s1.2 determine the size of the rectangular notch 25 and the circular notch 24 on the metal connector 2: according to the formula
b＝(α 1 -α 2 )×L 1 ×T×1.5×10 -6
The width of the rectangular notch 25 is calculated according to the formula d 1 ≥b×2 the diameter of the circular indentation 24 is calculated,
where b is the width of the rectangular opening 25 and d 1 Is the diameter, L, of the circular gap 24 1 Is the arc length between two rectangular notches 25, alpha 1 Is the coefficient of thermal expansion, alpha, of a metallic material 2 The coefficient of thermal expansion of the ceramic matrix composite material is shown, and T is the temperature in the use state;
s1.3 determining the major and minor diameters of the oval positioning hole 22: according to the formula
Calculate the major diameter of the oval positioning hole 22, where C 2 The major diameter, L, of the oval positioning hole 22 2 Is the arc length between two oval positioning holes 22, d 2 Is the diameter of the rivet 3;
minor diameter C of the oval positioning hole 22 1 With diameter d of rivet 3 2 The same;
s1.4 determining the diameter of the circular locating hole 21: according to the formula
d 3 ＝b×2.5
Calculating the diameter of the circular positioning hole 21, wherein d 3 The diameter of the circular positioning hole 21;
s2, machining the ceramic matrix composite body 1 and the metal connecting piece 2 according to the machining parameters determined in the step S1;
and S3, assembling the processed ceramic matrix composite body 1 and the metal connecting piece 2 to obtain the ceramic matrix composite member with the metal connecting piece.
Claims (8)
1. A ceramic matrix composite component with a metal connector, characterized in that:
comprises a ceramic matrix composite material body (1) and a metal connecting piece (2);
the ceramic matrix composite body (1) comprises a first connecting end which is a curved surface connecting end;
the first connecting end is provided with K connecting holes (11), and K is an integer greater than or equal to 2;
the metal connecting piece (2) comprises a second connecting end which is matched and tightly attached with the first connecting end;
the second connecting end is provided with K positioning holes corresponding to the connecting holes (11), the positioning holes are connected with the connecting holes (11) through rivets (3), M notches are uniformly arranged among the positioning holes, M is less than or equal to K and is a positive integer, and each notch consists of a rectangular notch (23) and a circular notch (24) communicated with the rectangular notch (23);
the ceramic matrix composite body (1) is cylindrical, and the metal connecting piece (2) is in a ring shape matched with the ceramic matrix composite body (1);
the outer side surface of the metal connecting piece (2) is arranged to be of an annular step structure, the second connecting end is matched with the spigot of the first connecting end, and the second connecting end is positioned on the inner side of the first connecting end;
the end face of the first connecting end is uniformly provided with M sealing bosses (12), the second connecting end is provided with grooves (25) matched with the sealing bosses (12), the circular notches (24) are formed in the inner wall face of each groove (25), and the sealing bosses (12) completely cover the circular notches (24).
2. The ceramic matrix composite component with metal connection according to claim 1, wherein:
the positioning holes comprise circular positioning holes (21) and oval positioning holes (22), and the oval positioning holes (22) are arranged on two sides of the notch.
3. The ceramic matrix composite structure with a metal connection according to claim 2, wherein:
the major diameter of the oval positioning hole (22) is arranged along the extension direction of the curved surface of the first connecting end.
4. The ceramic matrix composite structure with a metal connection according to any one of claims 1-3, wherein:
the width of the rectangular notch (23) is calculated according to the following formula:
b＝(α 1 -α 2 )×L 1 ×T×1.5×10 -6
the diameter of the circular notch (24) is calculated according to the following formula:
d 1 ≥b×2
wherein b is the width of the rectangular notch (23) and d 1 Is the diameter, L, of the circular gap (24) 1 Is the arc length between two rectangular gaps (23), alpha 1 Is the coefficient of thermal expansion, alpha, of a metallic material 2 T is the thermal expansion coefficient of the ceramic matrix composite material and the temperature in the use state.
5. The ceramic matrix composite structure with a metal connection according to claim 4, wherein:
the major diameter of the oval positioning hole (22) is calculated according to the following formula:
wherein, C 2 Is the major diameter, L, of the oval positioning hole (22) 2 Is the arc length between two oval positioning holes (22), d 2 The diameter of the rivet (3);
the minor diameter of the oval positioning hole (22) and the diameter d of the rivet (3) 2 The same;
the diameter of the circular positioning hole (21) is calculated according to the following formula:
d 3 ≥b×2.5
wherein, d 3 Is the diameter of the circular positioning hole (21).
6. The ceramic matrix composite structure with a metal connection according to claim 5, wherein:
the number of the connecting holes (11) is required to satisfy the following formula at the same time,
Wherein K is the number of the connecting holes (11), L is the total arc length of the first connecting end of the ceramic matrix composite body (1), D is the arc length between adjacent rivets (3), the range of the arc length D between the adjacent rivets (3) is 15-50mm, F is the required total connecting strength, and F is the total connecting strength of the ceramic matrix composite body 1 The connection strength of the single rivet (3).
7. The ceramic matrix composite component with metal connection according to claim 6, wherein:
the rivet (3) is a metal rivet or a composite material rivet, the diameter range of the metal rivet is 2-6 mm, and the diameter of the composite material rivet is 3-12 mm.
8. A method of making a ceramic matrix composite component with a metal connection according to claim 7, comprising the steps of:
s1, determining various processing parameters of the ceramic matrix composite material body (1) and the metal connecting piece (2);
s1.1 determining the number of connecting holes (11): simultaneously, the number of the connecting holes (11) is calculated according to the following formula:
Wherein K is the number of the connecting holes (11), L is the total arc length of the first connecting end of the ceramic matrix composite body (1), D is the arc length between adjacent rivets (3), the range of the arc length D between the adjacent rivets (3) is 15-50mm, F is the required total connecting strength, F is the total connecting strength of the ceramic matrix composite body, and 1 the connection strength of a single rivet (3);
the rivet (3) is a metal rivet or a composite material rivet, the diameter range of the metal rivet is 2-6 mm, and the diameter of the composite material rivet is 3-12 mm;
s1.2, determining the sizes of a rectangular notch (23) and a circular notch (24) on the metal connecting piece (2): the width of the rectangular notch (23) is calculated according to the following formula:
b＝(α 1 -α 2 )×L 1 ×T×1.5×10 -6
according to formula d 1 The diameter of the circular gap (24) is calculated to be more than or equal to bx 2;
wherein b is the width of the rectangular notch (23) and d 1 Is the diameter of the circular gap (24), L 1 Is the arc length between two rectangular notches (23), alpha 1 Is the coefficient of thermal expansion, alpha, of a metallic material 2 The coefficient of thermal expansion of the ceramic matrix composite material, and T is the temperature in the use state;
s1.3, determining the major diameter and the minor diameter of the oval positioning hole (22): the major diameter of the oval positioning hole (22) is calculated according to the following formula:
wherein, C 2 Is the major diameter, L, of the oval positioning hole (22) 2 Is the arc length between two oval positioning holes (22), d 2 The diameter of the rivet (3);
minor diameter C of the oval positioning hole (22) 1 Diameter d of the rivet (3) 2 The same;
s1.4, determining the diameter of a circular positioning hole (21): the diameter of the circular positioning hole (21) is calculated according to the following formula:
d 3 ≥b×2.5
wherein d3 is the diameter of the circular positioning hole (21);
s2, machining the ceramic matrix composite body (1) and the metal connecting piece (2) according to the machining parameters determined in the step S1;
and S3, assembling the processed ceramic matrix composite material body (1) and the metal connecting piece (2) to obtain the ceramic matrix composite material member with the metal connecting piece.
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| CN1948732A (en) * | 2005-10-12 | 2007-04-18 | 通用电气公司 | Bolting configuration for joining ceramic combustor liner to metal mouting attachments |
| CN201582269U (en) * | 2009-12-14 | 2010-09-15 | 苏州创新陶瓷有限公司 | Coupling mechanism of ceramic roller and shaft sleeve |
| CN103975166A (en) * | 2011-11-24 | 2014-08-06 | 轻型结构中心萨克森有限公司 | Device for introducing force into a component of fibre composite material |
| DE102012007571A1 (en) * | 2012-04-14 | 2013-10-17 | Daimler Ag | Securing element for positionally accurate positioning of two mutual joining components, useful e.g. as adhesive, comprises base body with first- and second connecting portion, where one of the connecting portions is present in elastic form |
| DE102012112867A1 (en) * | 2012-12-21 | 2014-06-26 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Mounting arrangement for connecting e.g. radomes of missiles with different coefficients of thermal expansion, has connecting portion including openings into which fastening elements engage, so that elements prevents movement of components |
| CN111622810A (en) * | 2019-02-27 | 2020-09-04 | 中国航发商用航空发动机有限责任公司 | Connection device, gas turbine engine, connection piece and turbine outer ring |
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| CN114370333A (en) | 2022-04-19 |
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Address after: 710117 West Section 912 of Biyuan Road, Xi'an High-tech Zone, Shaanxi Province Patentee after: Xi'an Xinyao Ceramic Composite Co.,Ltd. Guo jiahuodiqu after: Zhong Guo Address before: 710117 West Section 912 of Biyuan Road, Xi'an High-tech Zone, Shaanxi Province Patentee before: XI'AN GOLDEN MOUNTAIN CERAMIC COMPOSITES CO.,LTD. Guo jiahuodiqu before: Zhong Guo |