Method for riveting sheet metal

Abstract

The application relates to the field of plate connecting methods, in particular to a metal plate riveting method, which is characterized in that the upper surfaces of metal plates are made flush and butted to form a corner, a rivet is pressed into the two ends of the corner perpendicularly to the upper surface, and a first contact part and a second contact part are used to respectively apply mutual approaching binding force to the two ends of the corner, compared with the existing plate connecting method, the rivet and the connecting area and the connecting stability of the two ends of the corner can be ensured without overlapping of the two metal thin plates, compared with welding, the rivet is not prone to cracking caused by stress, the influence on subsequent assembly and other parts is reduced, and the appearance is ensured.

Description

Technical Field

[0001] This invention relates to the field of sheet metal joining methods, and more specifically to a method for riveting metal sheets. Background Technology

[0002] Metal sheets often need to be joined during production, and welding is a common method used in current technology to connect two metal sheets. However, welding can cause stress on the metal sheets, leading to cracking. Furthermore, to ensure sufficient contact area and thus the stability of the connection, current technology often overlaps the two metal sheets before joining them. However, this results in the joint being thicker than the rest of the sheet, affecting subsequent assembly with other parts and aesthetics. Summary of the Invention

[0003] The technical solution adopted by the present invention to solve its technical problem is: to provide a method for riveting metal plates, wherein the method uses a self-piercing riveting die to rivet thin metal plates, the self-piercing riveting die includes a riveting die one and a riveting die two, the riveting die one is connected with a rivet, the rivet includes a body, the body includes a first contact part, a second contact part and a connecting part, and the riveting die two is provided with a riveting groove corresponding to the riveting die one;

[0004] The metal sheet riveting method includes the following steps:

[0005] Step S1: Join the two metal sheets together to form a joint, and make the upper surfaces of the two metal sheets flush.

[0006] Step S2: Place the two ends of the splicing corner between the first and second riveting molds, and align the first contact part and the second contact part with the two ends of the splicing corner respectively;

[0007] Step S3: Activate the hydraulic tool so that the rivet is pressed into the two ends of the splice perpendicular to the upper surface of the metal sheet. The connecting part is located at the splice joint. The first contact part and the second contact part are riveted to the two ends of the splice respectively, and the first contact part and the second contact part apply a mutual approaching bonding force to the two ends of the splice respectively.

[0008] Furthermore, the cross-sectional dimensions of both the first connecting portion and the second connecting portion are larger than the cross-sectional dimensions of the connecting portion.

[0009] Furthermore, the main body has a butterfly-shaped or gourd-shaped structure.

[0010] Furthermore, the main body has a wave-shaped, W-shaped, L-shaped, V-shaped, or C-shaped structure.

[0011] Furthermore, the rivet also includes a countersunk head, the outer periphery of which is provided with a tapered surface, so that during riveting, the upper surface of the countersunk head is flush with the upper surface of the metal sheet.

[0012] Furthermore, the outer periphery of the main body is provided with multiple grooves.

[0013] Furthermore, multiple grooves are arranged side by side along the axial direction of the main body.

[0014] Furthermore, the riveting groove is provided with extrusion protrusions.

[0015] Furthermore, the riveting die set is provided with an elastic ejector, which is used to make the riveting die and the rivet relatively separate.

[0016] Furthermore, the riveting die is provided with a connecting sleeve, the riveting die is provided with an outer inclined surface, the elastic ejector is provided with an outer inclined surface, the connecting sleeve is provided with an inner limiting groove and an inner limiting groove, the inner limiting groove and the outer inclined surface correspond to each other, and the inner limiting groove and the outer inclined surface correspond to each other.

[0017] The beneficial effects of this invention are as follows: by making the upper surfaces of the metal plates flush and joining them to form a joint, pressing the rivets perpendicularly into both ends of the joint, and applying a mutual bonding force to both ends of the joint through the first contact part and the second contact part respectively, compared with existing plate connection methods, it can ensure the connection area and connection stability of the rivets and the ends of the joint without the two metal plates overlapping. Compared with welding, it is less prone to cracking due to stress, while also reducing the impact on the subsequent assembly of other parts and ensuring aesthetics. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] In the picture: Figure 1 This is an overall structural diagram of the self-piercing riveting mold provided by the present invention;

[0020] Figure 2 for Figure 1 A cross-sectional view of the self-piercing riveting die shown;

[0021] Figure 3 for Figure 1 The exploded view of riveting die one shown;

[0022] Figure 4 for Figure 2 A three-dimensional structural diagram of the rivet shown;

[0023] Figure 5 for Figure 4 A cross-sectional view of the rivet shown;

[0024] Figure 6 for Figure 1 The diagram shows the three-dimensional structure of the self-piercing riveting die when it is assembled onto a hydraulic tool.

[0025] Figure 7 for Figure 1 The diagram shows a top view of the main body being a butterfly-shaped structure connected to a thin metal sheet.

[0026] Figure 8 for Figure 7 Sectional view along axis AA;

[0027] Figure 9 for Figure 1 The image shown is a top view of the main body being an L-shaped structure connected to a thin metal sheet.

[0028] Figure 10 for Figure 1 The image shown is a top view of the main body being a W-shaped structure connected to a thin metal sheet.

[0029] Figure 11 for Figure 1 The image shown is a top view of the main body being a C-shaped structure connected to a thin metal sheet.

[0030] Figure 12 for Figure 1 The image shown is a top view of the main body being a gourd-shaped structure connected to a thin metal plate.

[0031] Explanation of reference numerals in the attached drawings: 10, Riveting die one; 11, Rivet; 111, Countersunk head; 112, Main body; 1121, First contact part; 1122, Second contact part; 1123, Groove; 1124, Connecting part; 12, Elastic ejector; 121, Outer inclined surface two; 122, Butterfly groove; 13, Connecting sleeve; 131, Inner limiting groove one; 132, Inner limiting groove two; 14, Outer inclined surface one; 15, Butterfly block; 20, Riveting die two; 21, Riveting groove; 211, Extrusion protrusion; 200, Thin metal sheet; 300, Hydraulic tool; 301, C-shaped head. Detailed Implementation

[0032] To make the technical problem to be solved, the technical solution, and the beneficial effects of this invention clearer, the invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic aspects of the invention, and therefore only shows the components relevant to the invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0033] Example 1

[0034] Please refer to Figure 1 , Figure 2 and Figure 4The present invention provides a method for riveting metal sheets. The method uses a self-piercing riveting die to rivet a thin metal sheet 200. The self-piercing riveting die includes a first riveting die 10 and a second riveting die 20. The first riveting die 10 is connected to a rivet 11. The rivet 11 includes a body 112. The body 112 includes a first contact portion 1121, a second contact portion 1122 and a connecting portion 1124.

[0035] The method for riveting metal sheets includes the following steps:

[0036] Step S1: Butt the two metal sheets 200 together to form a corner joint, and make the upper surfaces of the two metal sheets 200 flush.

[0037] In this embodiment, the included angle at the joint of the two metal plates 200 is 45°.

[0038] Step S2: Place the two ends of the splicing corner between the first riveting mold 10 and the second riveting mold 20, and align the first contact part 1121 and the second contact part 1122 with the two ends of the splicing corner respectively;

[0039] Step S3: Start the hydraulic tool 300 so that the rivet 11 is pressed into the two ends of the corner perpendicular to the upper surface. The connecting part 1124 is located at the corner joint. The first contact part 1121 and the second contact part 1122 are respectively riveted to the two ends of the corner. The first contact part 1121 and the second contact part 1122 respectively apply a mutual approaching bonding force to the two ends of the corner.

[0040] By making the upper surfaces of the metal sheet 200 flush and joining them to form a corner, the rivet 11 is pressed perpendicularly into both ends of the corner. The first contact part 1121 and the second contact part 1122 apply a mutual bonding force to both ends of the corner. Compared with existing metal sheet connection methods, this method can ensure the connection area and connection stability of the rivet 11 and the corner ends without the two metal sheets 200 overlapping. Compared with welding, it is less prone to cracking due to stress, while also reducing the impact on the subsequent assembly of other parts and ensuring aesthetics.

[0041] Furthermore, the cross-sectional dimensions of both the first connecting portion 1124 and the second connecting portion 1124 are larger than the cross-sectional dimension of the connecting portion 1124. For a specific embodiment, please refer to... Figure 7 and Figure 12 The main body 112 has a butterfly-shaped or gourd-shaped structure.

[0042] Please refer to Figure 4 and Figure 5 The rivet 11 also includes a countersunk head 111, which has a tapered surface on its outer periphery. When riveting, the upper surface of the countersunk head 111 is flush with the upper surface of the metal sheet 200.

[0043] After riveting is completed, the countersunk head 111 of the rivet 11 is flush with the upper surface of the metal sheet 200 by the riveting die 10, and the lower end of the rivet 11 protrudes from the lower surface of the metal sheet 200, so that the upper surface of the spliced ​​metal sheet 200 is kept at a consistent height and a flat surface is formed, which facilitates the subsequent assembly with other parts and ensures aesthetics.

[0044] Please refer to Figure 4 and Figure 5 The main body 112 has multiple grooves 1123 on its outer periphery. Multiple grooves 1123 are arranged side by side along the axial direction of the main body 112. The multiple grooves 1123 distributed on the outer periphery of the main body 112 increase the contact area between the rivet 11 and the metal sheet 200, thereby enhancing the connection strength between the metal sheet 200 and the rivet 11.

[0045] Please refer to Figure 1 and Figure 2 The second riveting die 20 is provided with a riveting groove 21 corresponding to the first riveting die 10. Specifically, the riveting groove 21 is adapted to the rivet 11. During riveting, the body 112 of the rivet 11 is inserted into the metal sheet 200, and the joint of the metal sheet 200 is punched out to form a hole that mates with the rivet 11.

[0046] Please refer to Figure 1 and Figure 2 The upper surface of the riveting groove 21 is provided with extrusion protrusions 211. During riveting, as the riveting die 10 presses down on the upper surface of the metal sheet 200, the extrusion protrusions 211 located at the lower part of the metal sheet 200 will work with the riveting die 10 to apply extrusion force to the joint of the metal sheet 200, causing the material at the joint of the metal sheet 200 to flow into the groove 1123, thereby realizing the riveting between the rivet 11 and the metal sheet 200.

[0047] Please refer to Figure 2 and Figure 3 The riveting die 10 is equipped with an elastic ejector 12, which is used to disengage the riveting die and the rivet. The riveting die 10 is equipped with a connecting sleeve 13. The riveting die 10 has an outer inclined surface 14, the elastic ejector 12 has an outer inclined surface 121, and the connecting sleeve 13 has an inner limiting groove 131 and an inner limiting groove 132. The inner limiting groove 131 corresponds to the outer inclined surface 14, and the inner limiting groove 132 corresponds to the outer inclined surface 121. Specifically, the elastic ejector 12 is an elastic rubber sleeve as used in the prior art, but it can also be replaced with other elastic ejector components.

[0048] The inner limiting groove 131 and inner limiting groove 132 on the connecting sleeve 13 cooperate with the outer inclined surface 14 and outer inclined surface 121 on the elastic ejector 12 to limit the relative positioning of the riveting die 10 and the elastic ejector 12, so that the elastic ejector 12 is not easy to detach from the riveting die 10 during the riveting process, thereby ensuring the stability of the installation of the elastic ejector 12.

[0049] During riveting, riveting die 10 and riveting die 20 move relative to each other. Riveting die 10 drives rivet 11 to penetrate the metal sheet and produces plastic deformation, forming an interlocking structure with the metal sheet. The elastic ejector 12 is deformed by the extrusion of riveting die 10 during riveting. When riveting is completed, it applies a reverse elastic force to riveting die 10, which facilitates the separation of rivet 11 and riveting die 10.

[0050] For further details, please refer to Figure 3 The elastic ejector 12 is provided with a butterfly groove 122 that matches the rivet 11, and the riveting die 10 is provided with a butterfly block 15 corresponding to the rivet 11. The butterfly block 15 is connected to the rivet 11. The connection between the butterfly block 15 and the rivet 11 can be a magnetic connection or an elastic sleeve (not shown in the figure), or other short-term connection methods in the prior art, which are not limited in this embodiment.

[0051] Please refer to Figure 6 The second riveting die 20 is connected to the C-shaped head 301 of the hydraulic tool 300, and the output end of the hydraulic tool 300 is connected to the first riveting die 10. The hydraulic tool 300 is used to drive the first riveting die 10 to move. The specific structure of the hydraulic tool 300 described in the above embodiment is shown in Chinese Invention Patent No. CN213002255U. Figure 6 As shown.

[0052] Example 2

[0053] Please refer to Figure 9 , Figure 10 and Figure 11 The difference between this embodiment and Embodiment 1 lies in that the main body 112 has a wavy, W-shaped, L-shaped, V-shaped, or C-shaped structure. When the main body 112 has an L-shaped or V-shaped structure, the included angle of the opening is different; the included angle for the L-shaped structure is 90°, and the included angle for the V-shaped structure is an acute or obtuse angle. Furthermore, the wavy structure is similar to the W-shaped structure, where the W-shaped structure is a wavy structure with a right-angled waveform. Therefore, this embodiment does not show schematic diagrams of the main body 112 having a V-shaped or wavy structure.

Claims

1. A method for riveting metal sheets, characterized in that: The metal sheet riveting method uses a self-piercing riveting die to rivet thin metal sheets. The self-piercing riveting die includes a riveting die one and a riveting die two. The riveting die one is connected to a rivet. The rivet includes a body, which includes a first contact part, a second contact part, and a connecting part. The riveting die two is provided with a riveting groove corresponding to the riveting die one. The metal sheet riveting method includes the following steps: Step S1: Join the two metal sheets together to form a joint, and make the upper surfaces of the two metal sheets flush. Step S2: Place the two ends of the splicing corner between the first and second riveting molds, and align the first contact part and the second contact part with the two ends of the splicing corner respectively; Step S3: Activate the hydraulic tool so that the rivet is pressed into the two ends of the splice perpendicular to the upper surface of the metal sheet. The connecting part is located at the splice joint. The first contact part and the second contact part are riveted to the two ends of the splice respectively, and the first contact part and the second contact part apply a mutual approaching bonding force to the two ends of the splice respectively.

2. The metal sheet riveting method according to claim 1, characterized in that: The cross-sectional dimensions of both the first connecting part and the second connecting part are larger than the cross-sectional dimensions of the connecting part.

3. The metal sheet riveting method according to claim 2, characterized in that: The main body has a butterfly-shaped or gourd-shaped structure.

4. The metal sheet riveting method according to claim 1, characterized in that: The main body has a wave-shaped, W-shaped, L-shaped, V-shaped, or C-shaped structure.

5. The metal sheet riveting method according to claim 3 or 4, characterized in that: The rivet also includes a countersunk head, the outer periphery of which is provided with a tapered surface. During riveting, the upper surface of the countersunk head is flush with the upper surface of the metal sheet.

6. The metal sheet riveting method according to claim 5, characterized in that: The outer periphery of the main body is provided with multiple grooves.

7. The metal sheet riveting method according to claim 5, characterized in that: Multiple grooves are arranged side by side along the axial direction of the main body.

8. The metal sheet riveting method according to claim 5, characterized in that: The riveting groove is provided with extrusion protrusions.

9. The method for riveting metal sheets according to claim 5, characterized in that: The riveting die set is equipped with an elastic ejector, which is used to make the riveting die and the rivet relatively separate.

10. The method for riveting metal sheets according to claim 5, characterized in that: The riveting die is provided with a connecting sleeve, the riveting die is provided with an outer inclined surface, the elastic ejector is provided with an outer inclined surface, the connecting sleeve is provided with an inner limiting groove and an inner limiting groove, the inner limiting groove and the outer inclined surface correspond to each other, and the inner limiting groove and the outer inclined surface correspond to each other.

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