CN210525868U - Pulse current-based rivet-free riveting device between carbon fiber composite material plate and aluminum alloy plate - Google Patents
Pulse current-based rivet-free riveting device between carbon fiber composite material plate and aluminum alloy plate Download PDFInfo
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- CN210525868U CN210525868U CN201920494161.9U CN201920494161U CN210525868U CN 210525868 U CN210525868 U CN 210525868U CN 201920494161 U CN201920494161 U CN 201920494161U CN 210525868 U CN210525868 U CN 210525868U
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Abstract
The utility model discloses a no rivet riveting set between carbon-fibre composite board and aluminum alloy plate based on pulse current, include: the top of the base is provided with a cylindrical groove; the split mold is installed on the base in a matching mode and is provided with a central through hole; the central through hole of the split mold is coaxial with the groove of the base; a spring disposed in the groove of the base; one end of the spring cushion block movably penetrates through the central through hole of the split mold and is fixedly connected with one end of the spring, and the other end of the spring cushion block extends to the outer side of the central through hole of the split mold; a blank holder having a central through hole; the punch can reciprocate in the central through hole of the blank holder along the axial direction of the central through hole; and two poles of the power supply device are respectively connected with the punch and the other end of the spring.
Description
Technical Field
The utility model belongs to the technical field of the riveting of carbon-fibre composite board and aluminum alloy plate, in particular to no rivet riveting set between carbon-fibre composite board and the aluminum alloy plate based on pulse current.
Background
Because of the requirements of environmental protection and energy conservation, the automobile light weight has become the main development direction of the automobile industry at present, and the main way for realizing the automobile light weight is to adopt light materials such as aluminum alloy, carbon fiber composite materials and the like. The use of the light material can reduce the preparation quality of the automobile, thereby reducing the fuel consumption, effectively improving the dynamic property of the whole automobile and meeting the requirements of energy conservation and emission reduction.
The pulse current has important influence on the plastic deformation and the tissue structure and performance of the metal material. The high-strength pulse current can reduce the flowing stress of the material and improve the plasticity of the material, and the stress reduction value is linearly increased along with the increase of the deformation amount under the given current density; the processing performance and the mechanical property of the metal material can be obviously improved, the dislocation configuration of the fatigue damage metal material is changed, and the fatigue life of the metal material is prolonged.
In the riveting process of the carbon fiber composite plate and the aluminum alloy plate, the carbon fiber composite plate needs to be pre-perforated. Because the carbon fiber composite material plate has poor plasticity and a complex microstructure, the damage form of the carbon fiber composite material plate also has multiple forms of fiber fracture, matrix cracking and the like, so that the riveted joint is easy to cause joint failure. Therefore, in the existing riveting process, a new process method needs to be added to ensure the connection strength of the aluminum alloy plate and the carbon fiber composite plate at the riveting joint, so as to obtain the riveting joint with good quality.
SUMMERY OF THE UTILITY MODEL
The utility model provides a rivet-free riveting device between a carbon fiber composite material plate and an aluminum alloy plate based on pulse current, which is provided with a spring and a spring cushion block; the purpose is that after the punch is punched, the riveting joint is formed into a self-locking structure, and then the resilience force of the spring is utilized to perform secondary forming on the riveting joint, so that the riveting joint is connected more firmly.
The utility model provides a technical scheme does:
the utility model provides a no rivet riveting set between carbon-fibre composite board and aluminium alloy plate based on pulse current, includes:
the top of the base is provided with a cylindrical groove;
the split mold is installed on the base in a matching mode and is provided with a central through hole;
the central through hole of the split mold is coaxial with the groove of the base;
a spring disposed in the groove of the base;
one end of the spring cushion block movably penetrates through the central through hole of the split mold and is fixedly connected with one end of the spring, and the other end of the spring cushion block extends to the outer side of the central through hole of the split mold;
a blank holder having a central through hole;
the punch can reciprocate in the central through hole of the blank holder along the axial direction of the central through hole;
and two poles of the power supply device are respectively connected with the punch and the other end of the spring.
Preferably, the spring cushion block is cylindrical and is arranged coaxially with the central through hole of the split mold.
Preferably, the top of the base is arranged outside the groove and provided with a circular convex edge, and the convex edge is coaxial with the groove.
Preferably, the punch comprises a needle body and a needle head which are coaxially connected;
the needle body is a cylinder, the needle head is in a round table shape, and the outer diameter of the needle head is smaller than that of the needle body.
Preferably, the positive pole of the power supply device is connected to the pin body of the punch, and the negative pole of the power supply device is connected to the spring.
Preferably, the spring is a helical compression spring having a stiffness coefficient of 2900N/mm.
The utility model has the advantages that:
(1) the utility model provides a no rivet riveted device between carbon-fibre composite board and the aluminium alloy plate is equipped with spring and spring cushion, accomplishes the back at the drift punching press, and on the basis that the riveting joint formed auto-lock structure, the resilience force of utilizing the spring to the riveting joint post forming, made the connection that the riveting connects more firm.
(2) The utility model provides a no rivet riveted device between carbon-fibre composite board and the aluminium alloy plate adopts the spring cushion, and its top surface and aluminium alloy plate contact are embedded in the trompil in advance of carbon-fibre composite board, and blank holder, drift, spring cushion, the equal coaxial placing of base easily carbon-fibre composite board and aluminium alloy plate location.
(3) The utility model provides a no rivet riveted device between carbon-fibre composite board and the aluminium alloy plate adopts the split mould, increased with carbon-fibre composite board's area of contact, when drift punching press panel, reducible carbon-fibre composite board prevents that panel from taking place the damage with the pressurized condition of aluminium alloy plate.
Drawings
FIG. 1 is the general structure schematic diagram of the rivetless riveting device between carbon-fibre composite board and the aluminium alloy plate based on pulse current.
Fig. 2 is a schematic view of the base structure of the present invention.
Fig. 3 is the schematic structural diagram of the split mold of the present invention.
Fig. 4 is the base and the split mold cooperation schematic diagram of the present invention.
Fig. 5 is a schematic view of the carbon fiber composite board and the aluminum alloy board of the present invention.
Fig. 6 is a schematic view of the punch descending to the bottom dead center.
Figure 7 is a schematic view of the present invention showing the completion of the secondary forming.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
As shown in FIG. 1, the utility model provides a no rivet riveting set between carbon-fibre composite material board and aluminum alloy plate based on impulse current, including base 110, split mould 120, spring 130, spring cushion 140, blank holder 150, drift 160 and power supply unit.
As shown in fig. 2, the base 110 is a disc-shaped structure, and a cylindrical groove 111 is formed in the center of the top of the base 110. Preferably, the top of the base 110 is provided with a circular rib 112 outside the groove 111, and the rib 112 is coaxial with the groove 111.
As shown in fig. 3 to 4, the split mold 120 is composed of a plurality of mold halves 121 and has a central through hole 122, and the split mold 120 slides radially outward when receiving an external force in a horizontal direction. The split mold 120 is installed on the base 111 in a matching manner, and a central through hole 122 of the split mold 120 is coaxial with the groove 111 on the base. The outer wall of the split mold 120 is located inside the ledge 122. The ribs 122 act as stops for the split mold 120 as the split mold 120 slides radially outward.
Adopt the split mould, increased with carbon-fibre composite board's area of contact, when drift punching press panel, reducible carbon-fibre composite board and aluminum alloy plate's the pressurized condition prevents that panel from taking place the damage.
The spring 130 is coaxially disposed in the groove 111 of the base 110. The lower end of the spring cushion block 140 movably penetrates through the central through hole 122 of the split mold and is fixedly connected with the upper end of the spring 130, and the upper end of the spring cushion block 140 extends to the position above the central through hole 122 of the split mold. Preferably, the spring spacer 140 is cylindrical and is disposed coaxially with the central through hole 122 of the split mold. Wherein the spring 130 is a helical compression spring with a stiffness coefficient of 2900N/mm.
The clamping ring 150 has a central through hole 151. The punch 160 is connected to the driving device and can reciprocate within the central through hole 151 of the blank holder 150 in the axial direction of the central through hole 151 under the driving of the driving device.
The two poles of the power supply unit (not shown) are connected to the lower ends of the punch 160 and the spring 130 by electric wires, respectively.
In this embodiment, punch 160 includes a needle body 161 and a needle head 162 that are coaxially connected; the needle body 161 is a cylinder, the needle head 162 is a circular truncated cone, and the outer diameter of the needle head 162 is smaller than the outer diameter of the needle body 161. The positive pole of the power supply device is connected with the pin body 162 of the punch, and the negative pole of the power supply device is connected with the lower end of the spring 130.
As shown in FIGS. 5-7, the utility model provides a based on impulse current's no rivet riveting set between carbon-fibre composite board and the aluminium alloy plate, the riveting process is as follows:
(1) the carbon fiber composite material plate 210 is provided with a pre-opening hole 211, and in order to ensure the positioning effect, the diameter of the pre-opening hole 211 is the same as the outer diameter of the spring cushion block 140.
(2) Sequentially placing the carbon fiber composite material plate 210 and the aluminum alloy plate 220 on the split mold 120 to enable the pre-opening hole 211 to be coaxial with the central through hole 122 of the split mold; and the upper end of the spring block 140 is abutted against the aluminum alloy plate 220 through the pre-opened hole 211.
(3) And placing the clamping ring 150 on the aluminum alloy plate 220, enabling the central through hole 151 of the clamping ring 150 to be coaxial with the pre-opening hole 211 on the carbon fiber composite material plate 210, and driving the clamping ring 150 to tightly press the aluminum alloy plate 220.
(4) The positive and negative poles of the power supply are connected to the lower ends of the plunger 160 and the spring 130, respectively, and the power supply is turned on to generate a rectangular pulse of a set current density. Meanwhile, pressure is applied to the punch 160, the punch 160 moves downwards along the central through hole 151 of the blank holder 150, and when the punch 160 contacts the aluminum alloy plate 220, the anode and the cathode of the power supply are communicated through the aluminum alloy plate 220, so that a pulse current loop is formed. When the temperature of the aluminum alloy plate 220 reaches the set temperature, the driving punch 160 continues to move downwards, so that the aluminum alloy plate 220 deforms downwards under the extrusion action of the punch 160 and partially enters the carbon fiber composite plate 210 and the central through hole 122 of the split mold 120, and the split mold 120 starts to receive external force in the horizontal direction and radially and outwards slides on the base 110. Meanwhile, as the punch 160 continues to descend, the spring 130 is gradually compressed, and the current density linearly decreases as the amount of spring deformation increases. The punch 160 is continuously pressurized until the punch 160 reaches the bottom dead center, at which time the aluminum alloy plate 220 is inserted into the pre-opening 211 of the carbon fiber composite material plate 210 at the riveting position and forms a snap-fit rivet joint.
(5) The punch 160 is stopped to be pressurized, the power supply device generating the pulse current is closed, the spring 130 rebounds to generate upward rebounding displacement, the bottom surface of the riveted joint is pushed to move upwards, the connection strength of the riveted joint is increased, and the riveted joint is subjected to secondary forming. And when the spring 130 stops moving upwards, completing the secondary forming of the riveting joint, completing the riveting work without the rivet, and taking down the carbon fiber composite material plate 210 and the aluminum alloy plate 220.
The device for riveting the carbon fiber composite material and the aluminum alloy without the rivet is provided with the spring and the spring cushion block, and the riveting joint is subjected to secondary forming by utilizing the resilience force of the spring on the basis that the riveting joint forms a self-locking structure after the punching of the punch, so that the connection of the riveting joint is firmer. The spring cushion block is adopted, the top surface of the spring cushion block is in contact with the aluminum alloy plate and is embedded in the pre-opening hole of the carbon fiber composite material plate, and the blank holder, the punch, the spring cushion block and the base are all coaxially placed, so that the carbon fiber composite material plate and the aluminum alloy plate are easily positioned.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (5)
1. The utility model provides a no rivet riveting set between carbon-fibre composite board and aluminium alloy plate based on pulse current which characterized in that includes:
the top of the base is provided with a cylindrical groove;
the split mold is installed on the base in a matching mode and is provided with a central through hole;
the central through hole of the split mold is coaxial with the groove of the base;
a spring disposed in the groove of the base;
one end of the spring cushion block movably penetrates through the central through hole of the split mold and is fixedly connected with one end of the spring, and the other end of the spring cushion block extends to the outer side of the central through hole of the split mold;
a blank holder having a central through hole;
the punch can reciprocate in the central through hole of the blank holder along the axial direction of the central through hole;
the two poles of the power supply device are respectively connected with the punch and the other end of the spring;
the top of the base is arranged on the outer side of the groove and provided with an annular convex edge which is coaxial with the groove;
the outer wall of the split mold is positioned on the inner side of the convex rib.
2. The device for rivetless riveting of a carbon fiber composite material plate and an aluminum alloy plate based on a pulse current as recited in claim 1, wherein the spring cushion block is cylindrical and is arranged coaxially with the central through hole of the split mold.
3. The device for rivetless riveting between a carbon fiber composite plate and an aluminum alloy plate based on pulse current according to claim 1 or 2, wherein the punch comprises a needle body and a needle head which are coaxially connected;
the needle body is a cylinder, the needle head is in a round table shape, and the outer diameter of the needle head is smaller than that of the needle body.
4. The device for riveting the carbon fiber composite plate and the aluminum alloy plate without rivet based on the pulse current according to claim 3, wherein a positive pole of the power supply device is connected with the pin body of the punch, and a negative pole of the power supply device is connected with the spring.
5. The device for rivetless riveting of a sheet of carbon fiber composite material and an aluminum alloy sheet based on a pulsed current of claim 4, wherein the spring is a helical compression spring with a stiffness coefficient of 2900N/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920494161.9U CN210525868U (en) | 2019-04-12 | 2019-04-12 | Pulse current-based rivet-free riveting device between carbon fiber composite material plate and aluminum alloy plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920494161.9U CN210525868U (en) | 2019-04-12 | 2019-04-12 | Pulse current-based rivet-free riveting device between carbon fiber composite material plate and aluminum alloy plate |
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| CN210525868U true CN210525868U (en) | 2020-05-15 |
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| CN201920494161.9U Expired - Fee Related CN210525868U (en) | 2019-04-12 | 2019-04-12 | Pulse current-based rivet-free riveting device between carbon fiber composite material plate and aluminum alloy plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109968680A (en) * | 2019-04-12 | 2019-07-05 | 吉林大学 | A kind of carbon fibre composite and aluminium alloy based on pulse current is without rivet riveting device and method |
| CN111659807A (en) * | 2020-06-12 | 2020-09-15 | 中南大学 | Method and device for butt joint of plates formed by internal high pressure |
| CN113459538A (en) * | 2021-05-31 | 2021-10-01 | 上海复合材料科技有限公司 | Composite material shell forming die |
-
2019
- 2019-04-12 CN CN201920494161.9U patent/CN210525868U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109968680A (en) * | 2019-04-12 | 2019-07-05 | 吉林大学 | A kind of carbon fibre composite and aluminium alloy based on pulse current is without rivet riveting device and method |
| CN109968680B (en) * | 2019-04-12 | 2023-09-08 | 吉林大学 | Pulse current-based carbon fiber composite material and aluminum alloy rivet-free riveting device and method |
| CN111659807A (en) * | 2020-06-12 | 2020-09-15 | 中南大学 | Method and device for butt joint of plates formed by internal high pressure |
| CN111659807B (en) * | 2020-06-12 | 2021-05-18 | 中南大学 | Method and device for butt joint of plates formed by internal high pressure |
| CN113459538A (en) * | 2021-05-31 | 2021-10-01 | 上海复合材料科技有限公司 | Composite material shell forming die |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200515 Termination date: 20210412 |
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| CF01 | Termination of patent right due to non-payment of annual fee |