Rivet welding connection process method

Abstract

The invention belongs to the technical field of automobile manufacturing, and particularly relates to a rivet welding connection process method. A rivet welding connection process method comprises the steps that a plate is obtained, and mounting holes are formed in the plate; providing a first riveting die, and installing a rivet on the first riveting die; the first riveting die pushes the rivet in the first direction, so that a riveting leg of the rivet is inserted into and extends out of the mounting hole; the first riveting die presses the riveting head of the rivet, so that the riveting shoulder of the rivet presses the plate; a second riveting die is provided, the second riveting die moves towards the plate in the second direction, and the end, away from the riveting head, of a riveting leg of the rivet is compressed so that a lock catch protruding out of the peripheral face of the riveting leg can be formed at the end; wherein the first direction is opposite to the second direction. According to the method, the problem that multi-layer plates made of heterogeneous materials such as ultrahigh-strength steel and aluminum are difficult to connect is solved, connection between ultrahigh-strength steel and multi-layer aluminum plates and steel plates or between ultrahigh-strength steel and carbon fibers and other heterogeneous materials can be achieved, and collinear production of a steel-aluminum multi-material hybrid vehicle body on a traditional steel vehicle body is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile manufacturing, and in particular relates to a riveting and welding connection process method. Background Art

[0002] With the development of lightweight body technology, many traditional steel bodies are also transitioning to mixed bodies of multiple materials such as steel and aluminum. The existing steel and aluminum parts in the automotive industry are mainly connected by self-piercing riveting (SPR) and flow drill screw (FDS) processes. For traditional automobile companies, their connection process system is the resistance spot welding process for steel bodies. If they want to produce steel and aluminum bodies, they need to upgrade the connection equipment and purchase SPR riveting and FDS riveting equipment; or establish a proprietary steel and aluminum mixed production line, which will require huge investment from the company.

[0003] In addition, in the existing riveting process, there is a problem that it is difficult or impossible to connect dissimilar materials such as ultra-high-strength steel and multi-layer aluminum plates, steel plates or ultra-high-strength steel and carbon fibers. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in view of the problem in the prior art that it is difficult or impossible to connect dissimilar materials such as ultra-high-strength steel and multi-layer aluminum plates, steel plates or ultra-high-strength steel and carbon fibers, a riveting and welding connection process method is provided.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a riveting welding connection process method, comprising:

[0006] Obtain a plate and form a mounting hole on the plate;

[0007] Providing a first riveting die, and installing rivets on the first riveting die;

[0008] The first riveting die pushes the rivet along a first direction so that the rivet leg of the rivet is inserted into and extends out of the mounting hole;

[0009] The first riveting die presses the rivet head of the rivet so that the rivet shoulder of the rivet presses the plate;

[0010] Providing a second riveting die, the second riveting die moves toward the plate along a second direction to compress an end of the rivet leg of the rivet away from the rivet head to form a lock buckle protruding from the outer peripheral surface of the rivet leg at the end; wherein the first direction is opposite to the second direction;

[0011] The riveted structure is welded to the welding plate.

[0012] According to the riveting and welding connection process method provided by the present invention, during the riveting process, the interlocking of the rivet and the plate is mainly achieved by the deformation of the rivet, and then the plate with rivets is connected to the steel plate or the ultra-high-strength steel plate through the traditional spot welding process, which solves the problem of difficulty in connecting multi-layer plates of heterogeneous materials such as ultra-high-strength steel and aluminum, and can realize the connection of heterogeneous materials such as ultra-high-strength steel and multi-layer aluminum plates, steel plates or ultra-high-strength steel and carbon fiber, and realize the co-production of steel-aluminum multi-material hybrid car bodies on the same line as traditional steel car bodies.

[0013] Optionally, the plate is a carbon fiber plate, and the method of forming the mounting hole on the plate includes:

[0014] Mounting holes are prefabricated on the carbon fiber plate.

[0015] Optionally, the plate is at least one layer of aluminum alloy plate, and the process of forming the mounting hole includes:

[0016] Providing a punching die, wherein the punching die moves along a second direction toward the at least one layer of aluminum alloy plate;

[0017] The first riveting die presses the rivet and the punching die to form a cutting mechanism on the at least one layer of aluminum alloy plate and then punches out the mounting hole.

[0018] Optionally, the process of forming the mounting hole further includes: providing a second riveting frame, the punching die being slidably assembled on the second riveting frame;

[0019] After punching out the mounting hole, the punching die withdraws from the second riveting frame;

[0020] The second riveting die is slidably assembled in the second riveting frame.

[0021] Optionally, the first riveting die pushes the rivet along the first direction to be inserted into the mounting hole, comprising:

[0022] Providing a first riveting frame and a positioning claw, wherein the positioning claw is installed on the first riveting frame;

[0023] The first riveting die pushes the rivet to move to a predetermined position along a first direction;

[0024] clamping the rivet in the positioning claw;

[0025] After the first riveting die pushes the rivet to abut against the plate, the positioning claw is released. The predetermined position here refers to the position before the rivet moves to contact the plate. The positioning claw clamps the end of the rivet leg away from the first riveting die and limits the position of the rivet leg, so that the rivet leg can move toward the plate under the push of the first riveting die, but does not swing left and right.

[0026] Optionally, clamping the rivet on the positioning claw includes:

[0027] The positioning claw has a plurality of bar-shaped claws, and the rivet clamps the centers of the plurality of bar-shaped claws.

[0028] Optionally, the plate is a carbon fiber plate, and the welding plate is a steel plate or an ultra-high-strength steel plate.

[0029] Optionally, the plate is at least one layer of aluminum alloy plate, and the welding plate is an ultra-high strength steel plate.

[0030] Optionally, before welding the riveted structure to the welding plate, the process further includes:

[0031] Structural adhesive is applied between the welding plate and the riveted structure.

[0032] Optionally, a spherical area for extruding structural adhesive is provided at one end of the rivet head away from the rivet leg.

[0033] Optionally, a heat treatment zone for increasing strength and elongation is provided at one end of the rivet leg away from the rivet head in the rivet.

[0034] According to the riveting and welding connection process provided by the present invention, the problem of difficulty in connecting multi-layer plates of heterogeneous materials such as ultra-high-strength steel and aluminum is solved, and the connection of ultra-high-strength steel and multi-layer aluminum plates, steel plates / ultra-high-strength steel and carbon fiber and other heterogeneous materials can be realized, and the co-production of steel-aluminum multi-material hybrid bodies on traditional steel bodies can be realized. Punching and riveting can be completed on one set of equipment without moving parts, which improves the accuracy and quality of riveting and achieves punching and riveting in one sequence. At the same time, the plate does not need to be deformed during riveting, so the performance requirements such as elongation of the riveted plate are relatively low, and more materials can be applied. At the same time, the present invention has no requirements on the thickness of the riveted plate, and can rivet two or three layers of plates. The rivet legs are longer and the rivet legs are deformed to achieve riveting. For plates within a certain thickness, the rivet leg deformation length of the same rivet can be used to correspond. For situations where the thickness difference is large, rivets with rivet legs of different lengths can be used to achieve riveting, which greatly reduces the types of rivets and the difficulty of production management. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a flow chart of a riveting welding connection process method provided by the present invention according to an embodiment;

[0036] Figure 2 is a flow chart of forming a riveted structure by a riveting welding connection process method provided by an embodiment of the present invention;

[0037] Figure 3 is a flow chart of forming a riveted structure by a riveting welding connection process method provided by another embodiment of the present invention;

[0038] Figure 4is a structural schematic diagram of a riveted structure formed by a riveting welding connection process method provided by an embodiment of the present invention;

[0039] Figure 5 It is a schematic diagram of the structure after the riveted structure and the welding plate are welded together according to the riveting welding connection process method provided by one embodiment of the present invention;

[0040] Figure 6 is a flow chart of welding a riveted structure and a welding plate together according to a riveting welding connection process method provided by an embodiment of the present invention;

[0041] Figure 7 It is a schematic diagram of the structure of a rivet in a riveting and welding connection method provided according to an embodiment of the present invention.

[0042] The reference numerals in the specification are as follows:

[0043] 1. Plate; 2. First riveting die; 3. Second riveting die; 4. Rivet; 5. Riveting structure; 6. First riveting frame; 7. Positioning claw; 8. Punching die; 9. Second riveting frame; 10. Mounting hole; 11. Welding plate; 20. Structural adhesive; 31. Protrusion; 41. Rivet leg; 42. Rivet head; 43. Spherical area; 44. Rivet shoulder; 45. Locking buckle; 46. Rivet hole; 50. Welding core. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a riveting welding connection process method, comprising:

[0046] Obtain a plate 1, and form a mounting hole 10 on the plate 1;

[0047] Providing a first riveting die 2, and installing a rivet 4 on the first riveting die 2;

[0048] The first riveting die 2 pushes the rivet 4 along a first direction so that the rivet leg 41 of the rivet 4 is inserted into and extends out of the mounting hole 10;

[0049] The first riveting die 2 presses the rivet head 42 of the rivet 4 so that the rivet shoulder of the rivet 4 presses the plate 1;

[0050] A second riveting die 3 is provided, and the second riveting die 3 moves toward the plate 1 along a second direction to compress an end of the rivet leg of the rivet 4 away from the rivet head 42 to form a lock protruding from the outer peripheral surface of the rivet leg 41 at the end; wherein the first direction is opposite to the second direction;

[0051] The riveted structure 5 is welded to the welding plate 11 .

[0052] In this embodiment, the rivet 4 includes a rivet head 42 and a rivet leg 41 connected to one end of the rivet head 42. The portion of the rivet head 42 protruding from the rivet leg 41 forms a rivet shoulder 44. The end face of the rivet head 42 facing away from the rivet leg 41 is a spherical area 43 and protrudes away from the rivet leg 41. A rivet hole 46 extending along the axial direction of the rivet 4 is provided in the rivet leg 41. The end of the rivet hole 46 close to the rivet head 42 is closed, and the end of the rivet hole 46 away from the rivet head is open. According to the riveting connection process method provided by the present invention, the rivet 4 and the plate 1 are interlocked mainly by the deformation of the rivet 4 during the riveting process, and then the plate 1 with rivets is connected to the steel plate or ultra-high-strength steel plate by the traditional spot welding process, which solves the problem of difficulty in connecting multi-layer plates of heterogeneous materials such as ultra-high-strength steel and aluminum, and can realize the connection of ultra-high-strength steel with multi-layer aluminum plates, steel plates or ultra-high-strength steel with heterogeneous materials such as carbon fiber, and realize the co-production of steel-aluminum multi-material hybrid car bodies on the traditional steel car bodies. In the attached Figure 2 and 3 In the figure, the direction of arrow X indicates a first direction, and the direction of arrow Y indicates a second direction.

[0053] In one embodiment, the plate 1 is a carbon fiber plate, and the method of forming the mounting hole on the plate includes:

[0054] The mounting holes 10 are prefabricated on the carbon fiber plate. In this embodiment, when the plate 1 is a heterogeneous material with poor plasticity such as carbon fiber, the plate 1 will be prefabricated with holes in advance, and then the rivets are placed in the prefabricated holes for riveting. The riveting method in the present invention mainly relies on the deformation of the rivet to achieve the interlocking of the rivet and the plate 1. The plate 1 does not need to be deformed, so the elongation and other performance requirements of the riveted plate 1 are relatively low, and any material can be applied.

[0055] In one embodiment, the plate 1 is at least one layer of aluminum alloy plate. In this embodiment, the at least one layer of aluminum alloy plate can be a single layer, or a double layer or more layers. The aluminum alloy plate does not need to be pre-punched in advance, and piercing, punching and riveting can be achieved by rivets. In the present invention, the punching and riveting of the aluminum alloy plate can be completed at one time, so that the rivet and the aluminum alloy (one or more layers) are riveted together to form a firm riveted structure.

[0056] In one embodiment, the process of forming the mounting hole 10 includes:

[0057] Providing a punching die 8, the punching die 8 moves along a second direction toward at least one layer of aluminum alloy plate;

[0058] The first riveting die 2 presses the rivet 4 and the punching die 8 to form a cutting mechanism on at least one layer of aluminum alloy plate and then punches out a mounting hole 10.

[0059] In another embodiment, a second riveting frame 9 is provided, and the punching die 8 is slidably mounted on the second riveting frame 9;

[0060] After punching out the mounting hole 10, the punching die 8 withdraws from the second riveting frame 9;

[0061] The second riveting die 3 is slidably assembled in the second riveting frame 9 .

[0062] like Figures 3 to 6 As shown, in another embodiment, the first riveting die 2 pushes the rivet 4 along the first direction to be inserted into the mounting hole 10, including:

[0063] A first riveting frame 6 and a positioning claw 7 are provided, and the positioning claw 7 is installed on the first riveting frame 6;

[0064] The first riveting die 2 pushes the rivet 4 to move to a predetermined position along a first direction;

[0065] Clamp the rivet 4 in the positioning claw 7;

[0066] After the first riveting die 2 pushes the rivet 4 to abut against the plate 1, the positioning claw 7 is released. The predetermined position here refers to the position before the rivet 4 moves to contact the plate 1. The positioning claw 7 clamps the end of the rivet leg 41 away from the first riveting die 2 and limits the position of the rivet leg 41, so that the rivet leg 41 can move toward the plate 1 under the push of the first riveting die 2, but does not swing left and right.

[0067] In another embodiment, clamping the rivet 4 on the positioning claw 7 includes:

[0068] The positioning claw 7 has a plurality of bar-shaped claws, and the rivet 4 clamps the centers of the plurality of bar-shaped claws.

[0069] In one embodiment, the plate 1 is a carbon fiber plate, and the welding plate 11 is a steel plate or an ultra-high-strength steel plate. In this embodiment, after some heterogeneous materials with poor plasticity such as carbon fiber and rivets form a riveted structure, the carbon fiber with rivets and the steel plate or ultra-high-strength steel plate are welded together by resistance spot welding. Finally, the connection between the steel plate or ultra-high-strength steel plate and the heterogeneous materials such as carbon fiber is achieved.

[0070] In another embodiment, the plate 1 is at least one layer of aluminum alloy plate, and the welding plate 11 is an ultra-high strength steel plate. In this embodiment, after the single-layer or multi-layer aluminum alloy plate and the rivet form a riveted structure, the aluminum alloy with rivets and the ultra-high strength steel are welded together by resistance spot welding, and finally the ultra-high strength steel and the aluminum alloy (single layer or two layers) are connected.

[0071] In one embodiment, before welding the riveted structure 5 to the welding plate 11, the method further includes:

[0072] Structural adhesive 20 is applied between the welding plate 11 and the riveted structure 5 .

[0073] In one embodiment, a spherical area 43 for extruding the structural adhesive 20 is provided at one end of the rivet head 42 of the rivet 4 away from the rivet leg 41. When the riveted structure 5 is welded to the welding plate 11, the provision of the spherical area 43 allows the spherical center convex area of ​​the rivet head 42 to contact the steel plate first, so that the structural adhesive can be expelled, and the structural adhesive can be prevented from remaining inside the weld core 50, thereby effectively improving the welding quality.

[0074] In one embodiment, a heat treatment zone for increasing strength and elongation is provided at one end of the rivet leg 41 away from the rivet head 42 of the rivet 4 .

[0075] According to the riveting and welding connection process provided by the present invention, the problem of difficulty in connecting multi-layer plates of heterogeneous materials such as ultra-high-strength steel and aluminum is solved, and the connection of ultra-high-strength steel and multi-layer aluminum plates, steel plates / ultra-high-strength steel and carbon fiber and other heterogeneous materials can be realized, and the co-production of steel-aluminum multi-material hybrid bodies on traditional steel bodies can be realized. Punching and riveting can be completed on one set of equipment without moving parts, which improves the accuracy and quality of riveting, and achieves punching and riveting in one sequence. At the same time, the plate 1 does not need to be deformed during riveting, so the elongation and other performance requirements of the riveted plate 1 are low, and more materials can be applied. At the same time, the present invention has no requirements on the thickness of the riveted plate 1, and two or three layers of plates 1 can be riveted. The rivet leg 41 of the rivet 4 is relatively long, and riveting is achieved by deforming the rivet leg 41. For plates 1 within a certain thickness, the deformation length of the rivet leg 41 of the same rivet 4 can be used to correspond. In the case of large thickness differences, rivets 4 with rivet legs 41 of different lengths can be used to achieve riveting, which greatly reduces the types of rivets 4 and the difficulty of production management.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A riveting welding connection process, characterized in that: include: Obtain a plate and form a mounting hole on the plate; Providing a first riveting die, and installing rivets on the first riveting die; The first riveting die pushes the rivet along a first direction so that the rivet leg of the rivet is inserted into and extends out of the mounting hole; The first riveting die presses the rivet head of the rivet so that the rivet shoulder of the rivet presses the plate; Providing a second riveting die, the second riveting die moves toward the plate along a second direction to compress an end of the rivet leg of the rivet away from the rivet head to form a lock buckle protruding from the outer peripheral surface of the rivet leg at the end; wherein the first direction is opposite to the second direction; The riveted structure is welded to the welding plate.

2. The riveting welding connection method according to claim 1, characterized in that: The plate is a carbon fiber plate, and the method for forming a mounting hole on the plate includes: Mounting holes are prefabricated on the carbon fiber plate.

3. The riveting welding connection method according to claim 1, characterized in that: The plate is at least one layer of aluminum alloy plate, and the process of forming the mounting hole includes: Providing a punching die, wherein the punching die moves along a second direction toward the at least one layer of aluminum alloy plate; The first riveting die presses the rivet and the punching die to form a cutting mechanism on the at least one layer of aluminum alloy plate and then punches out the mounting hole.

4. The riveting welding connection method according to claim 3 is characterized in that: The process of forming the mounting hole further includes: Providing a second riveting frame, on which the punching die is slidably assembled; After punching out the mounting hole, the punching die withdraws from the second riveting frame; The second riveting die is slidably assembled in the second riveting frame.

5. The riveting welding connection method according to claim 1, characterized in that: The first riveting die pushes the rivet along a first direction to be inserted into the mounting hole, comprising: Providing a first riveting frame and a positioning claw, wherein the positioning claw is installed on the first riveting frame; The first riveting die pushes the rivet to move to a predetermined position along a first direction; clamping the rivet in the positioning claw; After the first riveting die pushes the rivet to abut against the plate, the positioning claw is released.

6. The riveting welding connection method according to claim 5, characterized in that: The clamping of the rivet on the positioning claw comprises: The positioning claw has a plurality of bar-shaped claws, and the rivet clamps the centers of the plurality of bar-shaped claws.

7. The riveting welding connection method according to claim 1, characterized in that: The plate is a carbon fiber plate, and the welding plate is a steel plate or an ultra-high-strength steel plate.

8. The riveting welding connection method according to claim 1, characterized in that: The plate is at least one layer of aluminum alloy plate, and the welding plate is an ultra-high-strength steel plate.

9. The riveting welding connection method according to claim 1, characterized in that: Before welding the riveted structure to the welding plate, the method further includes: Structural adhesive is applied between the welding plate and the riveted structure.

10. The riveting welding connection method according to claim 1, characterized in that: A spherical area for extruding structural adhesive is arranged at one end of the rivet head away from the rivet leg.

11. The riveting welding connection method according to claim 1, characterized in that: One end of the rivet leg away from the rivet head in the rivet is provided with a heat treatment zone for increasing strength and elongation.

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