Fastener, riveting assembly, welding and riveting assembly and welding and riveting die

Abstract

The utility model discloses a fastener, a riveting assembly, a welding and riveting assembly and a welding and riveting die. A fastener comprises a body and a leakage-proof ring. The body comprises a main body, a boss and a convex ring; the main body is provided with a supporting surface which is suitable for supporting a metal plate; the boss protrudes out of the supporting face and is provided with a riveting groove, a riveting head stretches into the riveting groove and then applies force to the groove wall of the riveting groove, so that the boss deforms, and the riveting effect is achieved. The protruding ring is annular, protrudes out of the supporting face and surrounds the boss, and the section size of the protruding ring is gradually reduced in the direction away from the supporting face so that the protruding ring can be welded to a metal plate or penetrate into the metal plate to achieve sealing. A plurality of anti-rotation grooves are formed in the protruding ring, and gaps exist between the anti-rotation grooves and the outer surface of the protruding ring. The anti-rotation groove is filled with a metal plate during riveting, and the anti-rotation effect is achieved. The boss is sleeved with the leakage-proof ring, under the action of deformation of the boss, the leakage-proof ring also deforms, so that sealing between the leakage-proof ring and the metal plate is achieved, the double leakage-proof effect between the leakage-proof ring and the convex ring is achieved, and the leakage-proof effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of connecting piece, concretely relates to a fastener, riveting assembly, welding riveting assembly and welding riveting mould. BACKGROUND

[0002] At present, the fastener is hard connection after being screwed and fixed, and there is a certain gap between the fastener support surface and the contact surface of the sheet metal, which cannot prevent gas, liquid, dust and other substances from leaking. With the development of new energy automobile industry and technology, the market puts forward higher requirements for the leakproof performance of the fastener. In the prior art, a glue injection groove and a glue injection hole are reserved on the nut, and welding legs are uniformly distributed in the circumference. After welding, the glue injection hole is used to inject leakproof sealant into the glue injection groove to prevent leakage. However, the product structure is complex, the glue injection hole and the glue injection groove need to be pre-set on the nut. The product production process is complex, the mold life is low, and the manufacturing cost is high. The glue injection hole and the glue injection groove need to be realized by a complex molding process. The narrow hole makes the mold difficult to process, and the stress concentration is easy to crack, which increases the manufacturing cost. The leakproof process is complex and low in efficiency. The glue injection hole is used to inject leakproof sealant into the glue injection groove to prevent leakage after welding. The glue injection process makes the process complex and the cost increases. The glue injection leakproof effect is poor, and the leakproof performance is difficult to guarantee. In the closed and narrow closed hole, the flow ability of the glue is limited and it is difficult to guarantee complete filling of the hole, and air holes and air bubbles are easy to produce. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming the above-mentioned defects or problems in the background art, and provides a fastener, riveting assembly, welding riveting assembly and welding riveting mould.

[0004] To achieve the above-mentioned purpose, the utility model and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Solution one, a fastener, comprising

[0006] A body comprising a main body, a boss and a ring; the main body is provided with a support surface; the boss protrudes from the support surface and is provided with a riveting groove; the ring is annular, protrudes from the support surface and surrounds the boss, the cross-sectional size of the ring gradually decreases away from the support surface, and a plurality of anti-rotation grooves are arranged on the ring and spaced from the outer surface of the ring;

[0007] A leakproof ring is sleeved on the boss.

[0008] Solution two, based on solution one, the cross section of the ring is triangular, and the inclination angle of the ring away from the boss is smaller than the inclination angle of the ring close to the boss.

[0009] Scheme three, based on scheme one, the main body is provided with a material containing groove, the material containing groove is opened to the support surface and is arranged around the convex ring.

[0010] Scheme four, based on scheme one, the convex ring is located in the middle of the support surface, and the convex ring is located at the outer edge of the support surface.

[0011] Scheme five, based on scheme one, the main body is further provided with a threaded hole, and the threaded hole is in communication with the riveting groove.

[0012] Scheme six, based on scheme one, the main body is further provided with a threaded rod, and the threaded rod protrudes from one side of the main body away from the support surface or protrudes from the bottom of the riveting groove.

[0013] Scheme seven, based on scheme one, the outer wall of the convex ring is provided with a limiting tooth, and the leakage prevention ring is suitable for being embedded in the limiting tooth.

[0014] Scheme eight, a riveting assembly, comprising sheet metal and a fastener according to any one of schemes one to seven, the sheet metal is provided with a through hole, the convex ring is suitable for being pierced into the sheet metal to make the sheet metal fit the support surface and fill the anti-rotation groove, the convex ring is suitable for being inserted into the through hole and deformed to tighten the sheet metal, so that the leakage prevention ring is deformed, and the gap between the convex ring and the through hole is eliminated.

[0015] Scheme nine, a welding riveting assembly, comprising sheet metal and a fastener according to any one of schemes one to seven, the sheet metal is provided with a through hole, the convex ring is suitable for being welded with the sheet metal to make the sheet metal fit the support surface, the convex ring is suitable for being inserted into the through hole and deformed to tighten the sheet metal, so that the leakage prevention ring is deformed, and the gap between the convex ring and the through hole is eliminated.

[0016] Scheme ten, a welding riveting mold, suitable for fixing the sheet metal and a fastener according to any one of schemes one to seven, the sheet metal is provided with a through hole suitable for the convex ring to be inserted into, the welding riveting mold comprises

[0017] an electrode provided with a containing groove, suitable for forming an electric current path when contacting the sheet metal, so that the convex ring is welded with the sheet metal;

[0018] an insulating sleeve placed in the containing groove, provided with a mounting groove;

[0019] a riveting head seated on the bottom of the mounting groove and provided with a riveting part protruding out of the mounting groove, the outer wall of the riveting part gradually increases in size along the bottom of the mounting groove, and the riveting head is suitable for being inserted into the riveting groove and abutting against the wall of the riveting groove to deform the convex ring.

[0020] From the above description of the utility model and its preferred embodiments, relative to the prior art, the technical scheme of the utility model and its preferred embodiments have the following beneficial effects due to the following technical means:

[0021] 1. In scheme one and its preferred embodiments, a fastener comprises a body and a leak-proof ring.

[0022] The body comprises a main body, a boss and a protruding ring. The main body is provided with a support surface suitable for supporting sheet metal. The boss protrudes from the support surface and is provided with a riveting groove. By exerting force on the groove wall of the riveting groove after the rivet head is inserted into the riveting groove, the boss is deformed to achieve the effect of riveting. The protruding ring is annular, protrudes from the support surface and surrounds the boss. The cross-sectional dimension of the protruding ring gradually decreases in the direction away from the support surface, facilitating welding with the sheet metal or piercing into the sheet metal and achieving sealing. A plurality of anti-rotation grooves are provided on the protruding ring, and there is a gap between the anti-rotation grooves and the outer surface of the protruding ring. At the position of the anti-rotation grooves, the protruding ring is thinner and easier to weld. Moreover, due to the gap between the anti-rotation grooves and the outer surface of the protruding ring, the protruding ring still fully contacts the sheet metal during welding, ensuring sealing. The anti-rotation grooves are filled with sheet metal during riveting, achieving the effect of anti-rotation. The leak-proof ring is sleeved on the boss. Under the action of the deformation of the boss, the leak-proof ring also deforms, thereby achieving sealing with the sheet metal and forming a double leak-proof effect with the protruding ring. The fastener has reliable performance, simple structure and process, low comprehensive cost and good leak-proof effect.

[0023] 2. In scheme two and its preferred embodiments, the cross section of the protruding ring is triangular. The inclination angle of the protruding ring away from the boss is smaller than the inclination angle of the protruding ring close to the boss, so that the geometric center of the weld leg is relatively far away from the leak-proof ring, and less heat is conducted to the leak-proof ring.

[0024] 3. In scheme three and its preferred embodiments, the main body is provided with a material containing groove. The material containing groove is open to the support surface and is arranged in close contact and around the boss, so that during riveting, the sheet metal material flows into the material containing groove, ensuring that the boss does not exceed the plane of the sheet metal after riveting and does not affect the connection with other parts.

[0025] 4. In scheme four and its preferred embodiments, the boss is located at the middle of the support surface, and the protruding ring is located at the outer edge of the support surface, so that the leak-proof ring on the boss is far away from the center of the welding heat source, thereby preventing overheating from causing the leak-proof ring to fail to the greatest extent.

[0026] 5. In scheme five and its preferred embodiments, the body is further provided with a threaded hole. The threaded hole is in communication with the riveting groove, and the threaded hole has threads to achieve fastening with another object.

[0027] 6. In scheme six and its preferred embodiments, the body is further provided with a threaded rod. The threaded rod protrudes from one side of the main body away from the support surface or protrudes from the groove bottom of the riveting groove. The threaded rod has threads to achieve fastening with another object.

[0028] 7、Solution seven and its preferred embodiments, the outer wall of the boss is provided with a limit tooth, the anti-leakage ring is suitable for embedding the limit tooth to prevent the anti-leakage ring from rotating or separating relative to the boss.

[0029] 8、Solution eight and its preferred embodiments, a riveting assembly, comprising sheet metal and the above fastener, the sheet metal is provided with a through hole, the convex ring is suitable for being pierced into the sheet metal to make the sheet metal adhere to the supporting surface, realize sealing at the convex ring, and make the sheet metal fill the anti-rotation groove to realize the anti-rotation effect; the boss is suitable for extending into the through hole and being deformed to tighten the sheet metal, so that the anti-leakage ring is deformed, and the gap between the boss and the through hole is eliminated, realizing double sealing.

[0030] 9、Solution nine and its preferred embodiments, a welding riveting assembly, comprising sheet metal and the above fastener, the sheet metal is provided with a through hole, the convex ring is suitable for being welded with the sheet metal to make the sheet metal adhere to the supporting surface, realizing sealing; the boss is suitable for extending into the through hole and being deformed to tighten the sheet metal, so that the anti-leakage ring is deformed, and the gap between the boss and the through hole is eliminated, realizing double sealing.

[0031] 10、Solution ten and its preferred embodiments, a welding riveting die, which is suitable for fixing the sheet metal and the above fastener into one body, the sheet metal is provided with a through hole suitable for the boss to extend into, the welding riveting die comprises an electrode, an insulating sleeve and a riveting head. The electrode is provided with a containing groove, which is suitable for making the sheet metal, the electrode and the convex ring form a current path when contacting the sheet metal, so that the convex ring is welded with the sheet metal; the insulating sleeve is placed in the containing groove and is provided with a mounting groove; the insulating sleeve isolates the electrode and the riveting head to prevent shunt when welding. The riveting head is seated on the groove bottom of the mounting groove and is provided with a riveting part extending out of the mounting groove, the outer wall size of the riveting part gradually increases along the groove bottom close to the mounting groove, and the riveting head is suitable for extending into the riveting groove and abutting against the groove wall of the riveting groove to deform the boss, realizing riveting. The machining of one-time downstroke stroke simultaneously realizes riveting and welding, and the production efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following briefly introduces the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor on the basis of these drawings.

[0033] Figure 1 It is a perspective view of the body in embodiment one;

[0034] Figure 2 It is a perspective view of the fastener in embodiment one;

[0035] Figure 3 It is a structural schematic view of the fastener in embodiment one;

[0036] Figure 4 A perspective view of the second fastener of Example 1;

[0037] Figure 5 A structural schematic view of the second fastener of Example 1;

[0038] Figure 6 A perspective view of the third fastener of Example 1;

[0039] Figure 7 A structural schematic view of the third fastener of Example 1;

[0040] Figure 8 A structural schematic view of the riveting assembly of Example 3 when welding;

[0041] Figure 9 A structural schematic view of the riveting assembly of Example 3;

[0042] Figure 10 A perspective view of the riveting die of Example 3;

[0043] Figure 11 A structural schematic view of the riveting die of Example 3;

[0044] Explanation of main reference signs:

[0045] Body 10; main body 1; support surface 11; material containing groove 12; boss 2; riveting groove 21; limiting tooth 22; convex ring 3; anti-rotation groove 31; screw hole 4; screw rod 5; leakage prevention ring 20; sheet metal 30; via hole 301;

[0046] Riveting die 40; electrode 6; containing groove 61; insulating sleeve 7; mounting groove 71; riveting head 8; DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as exclusion of other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0048] In the claims, specification and above drawings of the present application, unless otherwise explicitly defined, the terms such as "first", "second" or "third" are used only to distinguish different objects, and are not used to describe a specific order.

[0049] In the claims, the specification, and the drawings of the present application, terms such as "top", "bottom", "front", "back", "leading", "trailing", etc., if any, are used for convenience only. Terms such as "center", "horizontal", "vertical", "left", "right", "up", and "down", if any, are used herein for convenience and are inconsistent with the actual orientation of the application attached to the drawings only. They do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the specific protection scope of the present application.

[0050] In the claims, the specification, and the above drawings of the present application, unless otherwise explicitly defined, the term "fixedly connected" or "fixedly connected" should be understood broadly, that is, any connection mode without displacement relationship and relative rotation relationship between the two, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0051] In the claims, the specification, and the above drawings of the present application, the terms "include", "have" and their variants are intended to mean "include but not limited to".

[0052] A fastener comprises a body 10 and a leak-proof ring 20.

[0053] Reference Figures 1-3 , the body 10 comprises a main body 1, a boss 2, a convex ring 3;

[0054] The outer contour of the main body 1 can be circular or polygonal. In this embodiment, the outer contour of the main body 1 is circular. The main body 1 is provided with a supporting surface 11 and a material containing groove 12, the supporting surface 11 is suitable for abutting with the sheet metal 30; the material containing groove 12 is opened on the supporting surface 11.

[0055] The boss 2 is annular, the boss 2 protrudes from the supporting surface 11, and in this embodiment, the boss 2 is located in the middle of the supporting surface 11 and is coaxially arranged with the main body 1, the boss 2 is provided with a riveting groove 21, the riveting groove 21 has an opening on the side away from the supporting surface 11, so that the rivet head 8 can be inserted, and the riveting groove 21 can be provided with a lead-in section at the opening, so as to facilitate the insertion of the rivet head 8. The material containing groove 12 is opened on the supporting surface 11 and is arranged around the boss 2, that is, the material containing groove 12 is arranged at the intersection of the boss 2 and the supporting surface 11. The outer wall of the boss 2 is provided with a limiting tooth 22.

[0056] The convex ring 3 is annular, and is used for welding or piercing the sheet metal 30. The convex ring 3 protrudes from the support surface 11 and surrounds the convex platform 2. In this embodiment, the convex ring 3 is located at the outer edge of the support surface 11, and is far away from the convex platform 2. The cross-sectional size of the convex ring 3 gradually decreases in the direction away from the support surface 11. In this embodiment, the cross section of the convex ring 3 is triangular. The inclination angle of the convex ring 3 far away from the convex platform 2 is smaller than the inclination angle of the convex ring 3 close to the convex platform 2. The convex ring 3 is provided with a plurality of anti-rotation grooves 31. The anti-rotation grooves 31 are spaced apart from the outer surface of the convex ring 3, that is, the anti-rotation grooves 31 are located in the inner circle of the convex ring 3. At the position of the anti-rotation grooves 31, the convex ring 3 is thinner and easier to weld, or is filled by the sheet metal 30 when riveting, thereby playing a role of anti-rotation.

[0057] The leakage prevention ring 20 is sleeved on the convex platform 2, and is suitable for being embedded and limited by the limiting teeth 22, so as to prevent the leakage prevention ring 20 from rotating or separating relative to the convex platform 2 (for example, the leakage prevention ring 20 wraps the upper and lower surfaces of the anti-rotation teeth). The leakage prevention ring 20 is annular and is suitable for being deformed. Since the convex platform 2 is far away from the convex ring 3, the leakage prevention ring 20 can be far away from the welding heat, thereby preventing overheating from causing failure.

[0058] The fastener can be a nut. Specifically, the body 10 is provided with a threaded hole 4, and the threaded hole 4 is communicated with the riveting groove 21, so as to be connected with an external object.

[0059] Reference Figures 4-7 The fastener can also be a bolt. Specifically, the body 10 is further provided with a threaded rod 5, and the threaded rod 5 protrudes from one side of the body 1 away from the support surface 11 or protrudes from the groove bottom of the riveting groove 21.

[0060] Embodiment two

[0061] A riveting assembly, comprising a sheet metal 30 and the above fastener,

[0062] The sheet metal 30 is provided with a through hole 301. The convex ring 3 is suitable for piercing the sheet metal 30, so that the sheet metal 30 is attached to the support surface 11, and the sheet metal 30 fills the anti-rotation groove 31. The convex platform 2 is suitable for extending into the through hole 301 and deforming to tighten the sheet metal 30, so that the leakage prevention ring 20 is deformed, the gap between the convex platform 2 and the through hole 301 is eliminated, and the sheet metal 30 is tightened to the convex platform 2 as the convex platform 2 is outwardly flanged.

[0063] In use, the rivet head 8 abuts against the convex platform 2. With the downward pressing of the stroke of the equipment, the convex platform 2 yields and deforms until the sheet metal 30 is tightened. At the same time, under the action of the extrusion force, the leakage prevention ring 20 deforms to eliminate the gap and close the gas-liquid passage. At the same time, the convex ring 3 pierces the sheet metal 30, and the outer circle of the convex ring 3 can keep a ring-shaped close structure with the sheet metal 30, so it also plays a role of closing the gas-liquid passage.

[0064] Embodiment three

[0065] A kind of riveting assembly, including sheet metal 30 and above-mentioned fastener, sheet metal 30 is equipped with via hole 301, convex ring 3 is suitable for being welded with sheet metal 30 to make sheet metal 30 adhere to support surface 11, boss 2 is suitable for being inserted into via hole 301 and suitable for being deformed to tighten sheet metal 30, so that the clearance between boss 2 and via hole 301 is eliminated.

[0066] Specifically, there can be two ways to achieve:

[0067] ① first welding, then riveting

[0068] Reference Figure 8 , Figure 9 , convex ring 3 is used as a welding leg, and its main role is to melt with sheet metal 30 after power on, before welding, the fastener is placed on the sheet metal 30, the convex ring 3 is adhered to the sheet metal 30; the general electrode 6 is in contact with the sheet metal 30 plane, the convex ring 3, the sheet metal 30 and the electrode 6 form a current path, under the action of resistance heat and pressure, the convex ring 3 and the sheet metal 30 are fused together, the gap is eliminated and the gas-liquid passage is closed.

[0069] After welding, riveting process is used, the rivet head 8 acts on the boss 2, with the depression of the device stroke, the boss 2 yields and deforms until the sheet metal 30 is tightened, and at the same time, the deformation of the leak-proof ring 20 is generated under the action of extrusion force, the gap is eliminated and the gas-liquid passage is closed.

[0070] ② welding and riveting are completed at the same time:

[0071] Reference Figure 9 , convex ring 3 is used as a welding leg, and its main role is to melt with sheet metal 30 after power on, before welding, the fastener is placed on the sheet metal 30, the convex ring 3 is adhered to the sheet metal 30.

[0072] The riveting process is realized by a riveting die 40 to fix the sheet metal 30 and the fastener together, referring to Figure 10 , Figure 11 , the riveting die 40 includes an electrode 6, an insulating sleeve 7 and a rivet head 8.

[0073] The electrode 6 is provided with a receiving groove 61, and the electrode 6 is suitable for forming a current path between the sheet metal 30, the electrode 6 and the convex ring 3 when contacting the sheet metal 30, so that the convex ring 3 is welded with the sheet metal 30; the electrode 6 is preferably made of copper material with good conductivity,

[0074] The insulating sleeve 7 is placed in the receiving groove 61, and the insulating sleeve 7 is provided with a mounting groove 71; the insulating sleeve 7 is preferably an insulator with certain toughness and hardness, and the insulating sleeve 7 is arranged between the electrode 6 and the rivet head 8 to prevent shunt during welding.

[0075] The rivet head 8 is seated on the bottom of the installation groove 71 and is provided with a riveting portion extending out of the installation groove 71, and the outer wall size of the riveting portion gradually increases along the bottom of the installation groove 71, and is roughly in the shape of a volcano. The boss 2 is adapted to extend into the riveting groove 21 and abut against the groove wall of the riveting groove 21 to deform the boss 2. The rivet head 8 is preferably made of die steel with good hardness and wear resistance.

[0076] In use, the rivet head 8 abuts against the boss 2, and as the equipment is pressed down, the boss 2 is deformed until the sheet metal 30 is buckled; at the same time, the anti-leakage ring 20 is deformed under the extrusion force to eliminate the gap and close the gas-liquid passage.

[0077] At the same time, the electrode 6 is in plane contact with the sheet metal 30, the convex ring 3, the sheet metal 30 and the electrode 6 form a current path, and under the action of resistance heat and pressure, the convex ring 3 and the sheet metal 30 are fused together to eliminate the gap and close the gas-liquid passage.

[0078] The above description and embodiment are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application. Through the inspiration of the present application or the above embodiment, those skilled in the art can obtain the modification, equivalent replacement or other improvement of the present application embodiment or one part of the technical features by combining the common knowledge, the ordinary technical knowledge in the art and / or the prior art through logical analysis, reasoning or limited test, which should be included in the protection scope of the present application.

Claims

1. A fastener, characterized by: The body (10) comprises a main body (1), a boss (2) and a ring (3); the main body (1) is provided with a support surface (11); the boss (2) protrudes from the support surface (11) and is provided with a riveting groove (21); the ring (3) is annular, protrudes from the support surface (11) and is arranged around the boss (2), the cross-sectional dimension of the ring (3) gradually decreases in the direction away from the support surface (11), and the ring (3) is provided with a plurality of anti-rotation grooves (31) spaced from the outer surface of the ring (3); The leak-proof ring (20) is sleeved on the boss (2). The cross section of the ring (3) is triangular, and the inclination angle of the ring (3) away from the boss (2) is smaller than the inclination angle of the ring (3) close to the boss (2).

2. A fastener as claimed in claim 1 wherein: The main body (1) is provided with a material containing groove (12) which is open to the support surface (11) and is arranged around the boss (2).

3. A fastener as defined in claim 1, wherein: The boss (2) is located in the middle of the support surface (11), and the ring (3) is located at the outer edge of the support surface (11).

4. The fastener of claim 1 wherein: The body (10) is also provided with a threaded hole (4) which communicates with the riveting groove (21).

5. The fastener of claim 1 wherein: The body (10) is also provided with a threaded rod (5) which protrudes from one side of the main body (1) away from the support surface (11), or protrudes from the bottom of the riveting groove (21).

6. A fastener as defined in claim 1, wherein: The outer wall of the boss (2) is provided with a limiting tooth (22), and the leak-proof ring (20) is adapted to fit the limiting tooth (22).

7. A fastener as defined in claim 1 wherein: The sheet metal (30) is provided with a through hole (301), the ring (3) is adapted to penetrate into the sheet metal (30) to make the sheet metal (30) fit the support surface (11), and the sheet metal (30) fills the anti-rotation groove (31); the boss (2) is adapted to penetrate into the through hole (301) and is adapted to be deformed to tighten the sheet metal (30), so that the leak-proof ring (20) is deformed, and the gap between the boss (2) and the through hole (301) is eliminated.

8. A riveted assembly characterized by: The sheet metal (30) is provided with a through hole (301), the ring (3) is adapted to be welded with the sheet metal (30) to make the sheet metal (30) fit the support surface (11), the boss (2) is adapted to penetrate into the through hole (301) and is adapted to be deformed to tighten the sheet metal (30), so that the leak-proof ring (20) is deformed, and the gap between the boss (2) and the through hole (301) is eliminated.

9. A rivet assembly, characterized by: The sheet metal (30) is provided with a through hole (301) adapted for the boss (2) to penetrate into, and the riveting die (40) comprises 10. A rivet die characterized by: ​ An electrode (6) is provided with a receiving groove (61) adapted to form a current path with the sheet metal (30), the electrode (6) and the convex ring (3) when contacting the sheet metal (30) to weld the convex ring (3) to the sheet metal (30); An insulating sleeve (7) is placed in the receiving groove (61) and provided with a mounting groove (71); A rivet head (8) is seated on the bottom of the mounting groove (71) and provided with a riveting portion extending out of the mounting groove (71), the outer wall of the riveting portion gradually increases in size along the bottom of the mounting groove (71), and the rivet head (8) is adapted to extend into the riveting groove (21) and abut against the groove wall of the riveting groove (21) to deform the convex ring (2).

Images