CN112810169A - Friction riveting device and riveting method for thermoplastic carbon fiber composite material and aluminum alloy - Google Patents
Friction riveting device and riveting method for thermoplastic carbon fiber composite material and aluminum alloy Download PDFInfo
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- CN112810169A CN112810169A CN202011634514.4A CN202011634514A CN112810169A CN 112810169 A CN112810169 A CN 112810169A CN 202011634514 A CN202011634514 A CN 202011634514A CN 112810169 A CN112810169 A CN 112810169A
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- rivet
- carbon fiber
- fiber composite
- aluminum alloy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/60—Riveting or staking
- B29C65/601—Riveting or staking using extra riveting elements, i.e. the rivets being non-integral with the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
Abstract
The invention discloses a friction riveting device of thermoplastic carbon fiber composite material and aluminum alloy, which comprises: the lower part of the female die is of a solid cylindrical structure, the center of the upper part of the female die is provided with a circular groove, and the bottom surface of the circular groove protrudes upwards to form a conical shape; the blank holder is of a cylindrical structure, a cylindrical central hole is formed in the center of the blank holder, and the blank holder is arranged above the female die and is coaxial with the female die; and the driving rod is coaxially arranged in the central hole and can perform rotary motion and axial feed motion along the central hole. The invention also discloses a riveting method of the friction riveting device of the thermoplastic carbon fiber composite material and the aluminum alloy, heat is generated through rotary friction, and the rotating speed and the axial feeding speed of the rivet are adjusted simultaneously, so that the optimal rivet welding state value between the thermoplastic carbon fiber composite material plate and the aluminum alloy plate is achieved, and the joint strength and the joint forming effect are improved.
Description
Technical Field
The invention relates to the technical field of riveting of a thermoplastic carbon fiber composite material plate and an aluminum alloy plate, in particular to a friction riveting device and a riveting method for a thermoplastic carbon fiber composite material and an aluminum alloy.
Background
Under the requirement of light weight of automobiles, composite materials and light alloy materials are applied to light structural products as main materials for light weight. The thermoplastic carbon fiber composite material has the remarkable characteristics of high toughness, high impact resistance, high damage tolerance, unlimited prepreg storage period, short molding period, recyclability, easiness in repair and the like, has the advantages of environmental protection, high efficiency and high performance, and is more and more widely applied to vehicle bodies.
With the increasing application of thermoplastic carbon fiber composite materials to vehicle bodies, the difficulty is that when the thermoplastic carbon fiber composite materials are connected with traditional metal materials, common connection modes such as gluing, riveting and welding can generate various technical and economic defects when the lightweight required materials are connected, so that connection failure or extremely high cost is caused. The carbon fiber composite material is used as a brittle material, has small plastic deformation in the deformation process, has more difference in ductility compared with a metal material, and can generate cracks and even break under severe conditions during riveting to influence the performance of a joint. Therefore, new techniques are needed to address these problems at the joint and further improve the performance of the joint.
Disclosure of Invention
The invention aims to design and develop a friction riveting device of a thermoplastic carbon fiber composite material and an aluminum alloy, which obtains a solid-phase welding effect by utilizing the rotational friction of a rivet, simultaneously retains the deformation self-locking characteristic of the traditional riveting and improves the connection strength of a joint.
The invention also aims to design and develop a riveting method of the friction riveting device of the thermoplastic carbon fiber composite material and the aluminum alloy, the temperature of a riveting area is determined according to the characteristics of the composite material, and the temperature is adjusted by adjusting the rotating speed and the axial feeding speed of the driving rod, so that the riveting effect is improved.
The technical scheme provided by the invention is as follows:
a friction riveting device of thermoplastic carbon fiber composite and aluminum alloy comprises:
the lower part of the female die is of a solid cylindrical structure, the center of the upper part of the female die is provided with a circular groove, and the bottom surface of the circular groove protrudes upwards to form a conical shape;
the blank holder is of a cylindrical structure, a cylindrical central hole is formed in the center of the blank holder, and the blank holder is arranged above the female die and is coaxial with the female die;
the driving rod is coaxially arranged in the central hole and can perform rotary motion and axial feed motion along the central hole;
the rivet comprises a rivet cap, a rivet neck and a rivet foot which are sequentially connected, and the rivet cap is mutually clamped with the driving rod;
the connecting piece is arranged between the female die and the blank holder;
a vacuum insulation tube disposed within the central bore in an interference fit;
the through hole is arranged at the lower part of the blank holder and is connected with the central hole;
the rivet sleeve is sleeved on the outer sides of the rivet cap, the rivet neck and the driving rod and is in clearance fit with the vacuum heat insulation pipe.
Preferably, the diameter of the top surface of the circular groove is 20mm, and the depth of the circular groove is 0-10 mm.
Preferably, the bottom of the driving rod is provided with an apex, the apex is in the shape of a polygon prism, a polygon frustum or a cross, and the apex and the nail cap are mutually clamped.
Preferably, the nail foot is provided with a split opening, and the edge of the split opening is arc-shaped.
Preferably, the height of the blank holder is 20mm, the diameter of the central hole is 20mm, the diameter of the driving rod is 12mm, the diameter of the rivet is the same as that of the driving rod, the height of the rivet is 0-40mm, the height of the rivet foot is 0-20mm, the height of the rivet sleeve is 40mm, and the aperture of the via hole is 1 mm.
Preferably, the method further comprises the following steps:
the temperature sensor is arranged at the joint of the via hole and the central hole;
a speed sensor provided on the drive lever for detecting a rotation speed and a descent speed;
and the controller is connected with the temperature sensor and the speed sensor and is used for maintaining the riveting temperature.
A riveting method of a friction riveting device of a thermoplastic carbon fiber composite material and an aluminum alloy uses the friction riveting device of the thermoplastic carbon fiber composite material and the aluminum alloy, and comprises the following steps:
placing a thermoplastic carbon fiber composite material plate to be riveted and an aluminum alloy plate between a female die and a blank holder and pressing the thermoplastic carbon fiber composite material plate and the aluminum alloy plate tightly, wherein the thermoplastic carbon fiber composite material plate is arranged on the female die;
assembling a rivet sleeve, a rivet and a driving rod, and driving the rivet to rotate and axially feed by the driving rod;
and step three, after the rivet is contacted with the thermoplastic carbon fiber composite plate and generates friction, adjusting the rotating speed and the axial feeding speed of the driving rod according to the riveting temperature until the optimal rivet welding state value is achieved between the thermoplastic carbon fiber composite plate and the aluminum alloy plate, stopping the driving rod from moving, and cooling until the riveting joint state is stable, so that the riveting joint is completed.
Preferably, the rotation speed in the third step satisfies:
in the formula, VfIs the speed of rotation, ξ is the rotation factor,t is the riveting temperature, FVFor initial application of pressure, m is the rivet mass, VbFor the initial rotational speed of the drive rod, DVIs the thickness of a thermoplastic carbon fiber composite plate DbIs the thickness of the aluminum alloy plate;
the axial feeding speed satisfies the following conditions:
in the formula, VhFor axial feed speed,. psi.kIs the initial feed rate.
Preferably, the optimal rivet welding state is as follows: the thermoplastic carbon fiber composite board and the aluminum alloy board are combined with each other, and an annular anchor hook shape is formed between the rivet and the board and a mechanical self-locking effect is formed.
The invention has the following beneficial effects:
1. the friction riveting device for the thermoplastic carbon fiber composite material and the aluminum alloy overcomes the defect that the joint of the carbon fiber composite material is damaged due to the brittleness of the carbon fiber composite material at room temperature, and the rivet rotates and rubs relative to the thermoplastic carbon fiber composite material plate to enable the connecting area of the thermoplastic carbon fiber composite material plate to generate certain temperature distribution, so that the plastic flowing effect of the thermoplastic carbon fiber plate is improved, and the joint forming effect is improved.
2. According to the riveting method of the friction riveting device for the thermoplastic carbon fiber composite material and the aluminum alloy, the rotating friction speed and the feeding speed of the rivet are controlled through the speed-temperature friction riveting monitoring system, the heat input of the riveting area is controlled, the riveting temperature can be kept in a proper range, the phenomena of plate cracking and breakage caused by temperature discomfort are avoided, and the joint strength is improved.
3. The joint prepared by the riveting method of the friction riveting device for the thermoplastic carbon fiber composite material and the aluminum alloy has the advantages of riveting and welding modes, and overcomes some corresponding defects; compared with the traditional riveting technology, the friction riveting does not damage the integrity of the thermoplastic carbon fiber composite material plate, does not have excess materials caused by punching, and is low in noise, green and environment-friendly; compared with the bonding technology, the friction riveting does not need an adhesive, the potential safety hazard of the gluing and bonding process in the aspects of high temperature resistance, impact resistance and ageing resistance is overcome, and after the joint is formed, the rivet is fixed on the joint, so that the bearing capacity of the joint is ensured; compared with special welding, the method has the advantages of relatively low cost, simple process, high production efficiency, realization of flow and convenience in production line integration.
Drawings
FIG. 1 is a schematic cross-sectional view of a friction riveting device of a thermoplastic carbon fiber composite material and an aluminum alloy.
FIG. 2 is a schematic structural view of the rivet driving system of the present invention.
FIG. 3 is a schematic view of the construction of the binder of the present invention.
FIG. 4 is a process flow diagram of a first step of the friction riveting process of the present invention.
FIG. 5 is a second process flow diagram of the friction riveting of the present invention.
FIG. 6 is a flow chart of a third step of the friction riveting process of the present invention.
FIG. 7 is a fourth process flow diagram of the friction riveting of the present invention.
FIG. 8 is a diagram showing the effect of forming the frictional rivet joint of the present invention.
Fig. 9 is a configuration diagram of the "speed-temperature" monitoring system of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
The thermoplastic composite material can generate plastic flow effect after being heated to a certain temperature, and the initial performance of the thermoplastic composite material is recovered after being cooled, so that the thermoplastic composite material can be connected with different materials by utilizing the softening flow performance generated by the thermoplastic composite material at a high temperature.
As shown in fig. 1, the friction riveting device of thermoplastic carbon fiber composite material and aluminum alloy of the invention specifically comprises: the die comprises a female die 111, a blank holder 121, a vacuum heat insulation pipe 122, a via hole 123, a driving rod 131, a rivet 140, a rivet sleeve 150 and a connecting piece, wherein the lower part of the female die 111 is of a solid cylindrical structure, the center of the upper part of the female die is provided with a circular groove 112, and the bottom surface of the circular groove 112 protrudes upwards to form a cone shape; as shown in fig. 3, the blank holder 121 is a cylindrical structure and has a cylindrical central hole 124 at the center, and the blank holder 121 is disposed above and coaxially with the female die 111; the connecting piece comprises a thermoplastic carbon fiber composite plate 161 and an aluminum alloy plate 162, wherein the thermoplastic carbon fiber composite plate 161 and the aluminum alloy plate 162 are arranged between the female die 111 and the blank holder 121, and the thermoplastic carbon fiber composite plate 161 is arranged above the blank holder; a vacuum insulation tube 122 is disposed within the central bore 124 by interference; the via hole 123 is arranged at the lower part of the blank holder 121 and is connected with the central hole 124; the driving rod 131 is a cylindrical structure, is coaxially disposed inside the central hole 124, and can perform a rotational movement and an axial feed movement along the central hole 124.
As shown in fig. 2, the bottom of the driving rod 131 is provided with a tip 132, the tip 132 is a key part cooperating with the rivet 140, and the tip 132 is in the shape of a polygon prism, a polygon frustum or a cross; the rivet 140 comprises a rivet cap 141, a rivet neck 142 and a rivet foot 143 which are connected in sequence, the rivet cap 141, the rivet neck 142 and the rivet foot 143 are of an integral structure, the rivet cap 141 and the tip 132 are clamped with each other, and the rivet is driven to move through the matching of the tip 132 and the rivet cap 141; the rivet 140 is a solid rivet, the overall diameter of the rivet 140 is 12mm consistent with that of the driving rod 131, a groove is arranged above the rivet cap 141, and the shape of the groove is consistent with that of the tip 132 and can be matched with that of the driving rod 131; the nail foot 143 is provided with the jag opening, the edge of the jag opening is excessive with the circular arc section, the design of the jag opening can improve the heat that the rivet 140 produced when rotating and rubbing, can lighten the quality of the rivet 140 at the same time, the jag opening thickness of the nail foot 143 is 2mm, the height can be set to 0-20mm (the specific height should slightly be smaller than the overall thickness of the panel as being appropriate, if the thickness of two panels is 10mm respectively, then the jag opening height of the nail foot 143 can be set to 16 mm), the height of the nail foot 143 is consistent with the overall thickness of the panel, the height of the nut 141 and the nut 142 can be set to 20mm, the overall height of the rivet 143 can be set to 0-40mm (the specific height takes the height of the nail foot 143 as the standard, the height of the nail foot 143 plus the height of the nut 141 and.
Due to the rotary feed motion of the rivet, the rivet has certain requirements on the material of the rivet, and preferably, the rivet can be made of carbon steel, titanium alloy, nickel-based high-temperature alloy, hard alloy and the like.
The outside of rivet 140 is provided with rivet cover 150, and rivet cover 150 is hollow cylindrical structure, and the internal diameter of rivet cover 150 is 12mm, and is unanimous with rivet 140 and actuating lever 131 size, and the external diameter is 20 mm. The height of the rivet sleeve 150 is 40mm, the lower part of the rivet sleeve 150 wraps the positions of the rivet cap 141 and the rivet neck 142, and the upper part of the rivet sleeve can wrap the driving rod 131. The rivet sleeve 150 is internally provided with threads, so that the rivet 140 and the driving rod 131 can be conveniently fastened, and the driving rod 131 and the rivet 140 can be prevented from falling off in the friction riveting process.
The diameter of the top surface of the circular groove 112 is 20mm, the depth of the circular groove 112 is 0-10mm (the depth 112 of the circular groove 112 is based on the thickness of the plate, if the thickness of the plate is 10mm, the depth of the circular groove 112 is preferably 4 mm), the volume of the circular groove 112 is approximately equal to the volume of the nail foot 143, the height of the blank holder 121 is 20mm, the diameter of the central hole 124 is 20mm, the diameter of the driving rod 131 is 12mm, the diameter of the rivet 140 is the same as that of the driving rod 131, the height of the rivet 140 is 0-40mm, the height of the nail foot 143 is 0-20mm, the height of the rivet sleeve 150 is 40mm, and the aperture of the via hole 123 is 1 mm.
As shown in fig. 9, the friction riveting apparatus of thermoplastic carbon fiber composite material and aluminum alloy according to the present invention further includes: a temperature sensor 171, a speed sensor 172 and a controller 173, wherein the temperature sensor 171 is arranged at the connection position of the through hole 123 and the central hole 124; a speed sensor 172 is provided on the drive lever 131 for detecting a rotation speed and a descent speed; the controller 173 is connected to the temperature sensor 171 and the speed sensor 172 for maintaining the caulking temperature.
As shown in fig. 4-7, the working process of the invention is as follows: the driving rod 131 drives the rivet 140 to rotate and axially feed, the rivet 140 is contacted with the thermoplastic carbon fiber composite plate 161 along with the axial movement of the rivet 140, the friction starts, the rivet 140 rotates and the axial servo feeding is continuously carried out, the rivet enters the thermoplastic carbon fiber composite plate 161, the rotating speed of the rivet 140 is reduced compared with the initial speed at the moment, the axial force is continuously reduced, the plate is locally heated and softened under the action of pressure and friction heat, the thermoplastic carbon fiber composite plate 161 generates a plastic softening flow phenomenon under the action of high temperature, the ductility of the plate is improved, the rivet 140 is simultaneously softened, the rivet 140 deforms to generate self locking along with the continuous movement of the rivet 140 rotating and the axial feeding, the plastic flow phenomenon between the plates forms a rivet welding state in a connecting area, and when the connecting area reaches an optimal rivet welding state value, the driving rod 131 stops moving, the rivet 140 is suddenly stopped relative to the thermoplastic carbon fiber composite material plate 161, cooled and observed for a period of time, and after the joint state is stable, the joint is slowly taken out, and the joint is riveted, as shown in fig. 8.
According to the friction riveting device for the thermoplastic carbon fiber composite material and the aluminum alloy, the rivet 140 performs rotary friction relative to the thermoplastic carbon fiber composite material plate 161, so that a certain temperature distribution is generated in the connecting area of the thermoplastic carbon fiber composite material plate 161, and the thermoplastic carbon fiber composite material plate 161 is plasticized and flows through axial feeding and relative rotation of the rivet 140, so that a dynamic rivet welding state is generated, a solid-phase welding effect can be generated, the connecting strength of a connecting joint is obviously improved, the integrity of the thermoplastic carbon fiber composite material plate 161 is not damaged, and the bearing capacity of the structure is ensured.
The invention provides a riveting method of a friction riveting device of a thermoplastic carbon fiber composite material and an aluminum alloy, which uses the friction riveting device of the thermoplastic carbon fiber composite material and the aluminum alloy and comprises the following steps:
placing a thermoplastic carbon fiber composite material plate to be riveted and an aluminum alloy plate between a female die and a blank holder and pressing the thermoplastic carbon fiber composite material plate and the aluminum alloy plate tightly, wherein the thermoplastic carbon fiber composite material plate is arranged on the female die;
assembling and centering the rivet sleeve, the rivet and the driving rod, driving the rivet to rotate by the driving rod, and simultaneously feeding in an axial servo manner;
step three, when the rivet is contacted with the thermoplastic carbon fiber composite material plate and generates friction, and enters the thermoplastic carbon fiber composite material plate, the rotating speed of the rivet is reduced compared with the initial speed, the axial force is continuously reduced, the temperature of the part of the thermoplastic carbon fiber composite material plate is locally increased and softened under the action of pressure and friction heat, the thermoplastic carbon fiber composite material plate generates a plastic softening and flowing phenomenon under the action of high temperature, the ductility of the plate is improved, the rivet is simultaneously softened, as shown in figure 9, a speed-temperature monitoring system detects the temperature of a riveting area, judges whether the temperature is proper or not, regulates and controls the speed of a driving rod in real time, so that the riveting temperature can be kept in a proper range, the performance of the plate is ensured, and the joint strength is improved; the rivet is deformed to generate self locking along with the continuous proceeding of the rotation and the axial feeding of the rivet, a rivet welding state is formed in a connecting area, the rotation speed and the axial feeding speed of the driving rod are adjusted according to the riveting temperature until the connecting area between the thermoplastic carbon fiber composite plate and the aluminum alloy plate reaches the optimal rivet welding state value, the driving rod is stopped, the rivet is suddenly stopped relative to the base metal, the cooling observation is carried out for a period of time, after the joint state is stable, the joint is slowly taken out, and the riveting joint is completed.
Wherein the rotating speed in the third step satisfies:
in the formula, VfIs the rotation speed, xi is the rotation factor, T is the riveting temperature, FVFor initial application of pressure, m is the rivet mass, VbFor the initial rotational speed of the drive rod, DVIs the thickness of a thermoplastic carbon fiber composite plate DbIs the thickness of the aluminum alloy plate;
the axial feeding speed satisfies the following conditions:
in the formula, VhFor axial feed speed,. psi.kIs the initial feed rate.
Preferably, the initial rotation speed of the rivet is 300-10000r/min, the initial applied pressure is 0-5000N, different temperature intervals are selected according to different types of carbon fibers, the reference temperature interval of the riveting temperature can be set to be 100-120 ℃, and the axial feeding speed of the rivet is in the range: 500mm/s to 800mm/s, the range of the rotating speed of the rivet is as follows: 300 r/min-10000 r/min.
The optimal rivet welding state is as follows: the thermoplastic carbon fiber composite board and the aluminum alloy board are combined with each other, and an annular anchor hook shape is formed between the rivet and the board and a mechanical self-locking effect is formed.
The invention also aims to design and develop a riveting method of the friction riveting device of the thermoplastic carbon fiber composite material and the aluminum alloy, the temperature of a riveting area is determined according to the characteristics of the composite material, and the temperature is adjusted by adjusting the rotating speed and the axial feeding speed of the driving rod, so that the riveting effect is improved.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (9)
1. The utility model provides a friction riveting set of thermoplasticity carbon-fibre composite and aluminum alloy which characterized in that includes:
the lower part of the female die is of a solid cylindrical structure, the center of the upper part of the female die is provided with a circular groove, and the bottom surface of the circular groove protrudes upwards to form a conical shape;
the blank holder is of a cylindrical structure, a cylindrical central hole is formed in the center of the blank holder, and the blank holder is arranged above the female die and is coaxial with the female die;
the driving rod is coaxially arranged in the central hole and can perform rotary motion and axial feed motion along the central hole;
the rivet comprises a rivet cap, a rivet neck and a rivet foot which are sequentially connected, and the rivet cap is mutually clamped with the driving rod;
the connecting piece is arranged between the female die and the blank holder;
a vacuum insulation tube disposed within the central bore in an interference fit;
the through hole is arranged at the lower part of the blank holder and is connected with the central hole;
the rivet sleeve is sleeved on the outer sides of the rivet cap, the rivet neck and the driving rod and is in clearance fit with the vacuum heat insulation pipe.
2. The friction riveting apparatus of thermoplastic carbon fiber composite and aluminum alloy according to claim 1, wherein the diameter of the top surface of the circular groove is 20mm, and the depth of the circular groove is 0-10 mm.
3. The friction riveting device of thermoplastic carbon fiber composite and aluminum alloy as claimed in claim 2, wherein the bottom of the driving rod is provided with a tip, the tip is in the shape of a polygon prism, a polygon frustum or a cross, and the tip and the nail cap are mutually clamped.
4. The friction riveting apparatus for thermoplastic carbon fiber composite and aluminum alloy according to claim 3, wherein the nail foot is provided with a split opening, and the edge of the split opening is arc-shaped.
5. The friction riveting device for the thermoplastic carbon fiber composite material and the aluminum alloy as claimed in claim 4, wherein the height of the blank holder is 20mm, the diameter of the central hole is 20mm, the diameter of the driving rod is 12mm, the diameter of the rivet is the same as that of the driving rod, the height of the rivet is 0-40mm, the height of the nail foot is 0-20mm, the height of the rivet sleeve is 40mm, and the aperture of the through hole is 1 mm.
6. The apparatus for friction riveting a thermoplastic carbon fiber composite material with an aluminum alloy according to claim 5, further comprising:
the temperature sensor is arranged at the joint of the via hole and the central hole;
a speed sensor provided on the drive lever for detecting a rotation speed and a descent speed;
and the controller is connected with the temperature sensor and the speed sensor and is used for maintaining the riveting temperature.
7. A riveting method of a friction riveting device of a thermoplastic carbon fiber composite material and an aluminum alloy is characterized in that the friction riveting device of the thermoplastic carbon fiber composite material and the aluminum alloy according to the claims 1-6 is used, and comprises the following steps:
placing a thermoplastic carbon fiber composite material plate to be riveted and an aluminum alloy plate between a female die and a blank holder and pressing the thermoplastic carbon fiber composite material plate and the aluminum alloy plate tightly, wherein the thermoplastic carbon fiber composite material plate is arranged on the female die;
assembling a rivet sleeve, a rivet and a driving rod, and driving the rivet to rotate and axially feed by the driving rod;
and step three, after the rivet is contacted with the thermoplastic carbon fiber composite plate and generates friction, adjusting the rotating speed and the axial feeding speed of the driving rod according to the riveting temperature until the optimal rivet welding state value is achieved between the thermoplastic carbon fiber composite plate and the aluminum alloy plate, stopping the driving rod from moving, and cooling until the riveting joint state is stable, so that the riveting joint is completed.
8. The method for riveting a thermoplastic carbon fiber composite material and an aluminum alloy by using a friction riveting device according to claim 7, wherein the rotating speed in the third step satisfies the following conditions:
in the formula, VfIs the rotation speed, xi is the rotation factor, T is the riveting temperature, FVFor initial application of pressure, m is the rivet mass, VbFor the initial rotational speed of the drive rod, DVIs the thickness of a thermoplastic carbon fiber composite plate DbIs the thickness of the aluminum alloy plate;
the axial feeding speed satisfies the following conditions:
in the formula, VhFor axial feed speed,. psi.kIs the initial feed rate.
9. The method of claim 8, wherein the optimal rivet welding state is as follows: the thermoplastic carbon fiber composite board and the aluminum alloy board are combined with each other, and an annular anchor hook shape is formed between the rivet and the board and a mechanical self-locking effect is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011634514.4A CN112810169A (en) | 2020-12-31 | 2020-12-31 | Friction riveting device and riveting method for thermoplastic carbon fiber composite material and aluminum alloy |
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| CN202011634514.4A CN112810169A (en) | 2020-12-31 | 2020-12-31 | Friction riveting device and riveting method for thermoplastic carbon fiber composite material and aluminum alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114851591A (en) * | 2022-04-12 | 2022-08-05 | 国营芜湖机械厂 | Method for repairing metal structure crack by using thermoplastic carbon fiber composite material |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114851591A (en) * | 2022-04-12 | 2022-08-05 | 国营芜湖机械厂 | Method for repairing metal structure crack by using thermoplastic carbon fiber composite material |
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