Rivet and hot rivet welding connection equipment

Abstract

The utility model discloses a rivet and a hot rivet welding connection device. The rivet comprises a rivet shoulder, a rivet sleeve and a rivet sleeve, the riveting leg comprises a riveting leg body and riveting leg teeth, the riveting leg body is connected to one axial end of the riveting shoulder and extends in the axial direction of the riveting shoulder, the riveting leg teeth are arranged on the peripheral wall of the riveting leg body and extend in the axial direction of the riveting shoulder, and the multiple riveting leg teeth are distributed in the circumferential direction of the riveting leg body. According to the rivet, on the basis that riveting of the rivet and the first connecting piece is guaranteed, the riveting area of the riveting leg pressed into the first connecting piece can be reduced through the arrangement of the riveting leg teeth, the riveting force is reduced, the difficulty that the riveting leg stretches into the prefabricated hole is lowered, riveting of the rivet and the first connecting piece is facilitated, and welding of the rivet and the second connecting piece is facilitated; and the contact area of the rivet and the first connecting piece can be increased, the rivet and the first connecting piece can be well interlocked after hot rivet welding is completed, the reliability of connection between the rivet and the first connecting piece is guaranteed, and the first connecting piece is prevented from rotating.

Description

TECHNICAL FIELD

[0001] The utility model relates to the connecting technical field especially a rivet and hot rivet welding connection equipment. BACKGROUND

[0002] In the related art, for the dissimilar metal connection problem of aluminum plate and steel plate, it is usually transformed into the same metal welding problem, rivets are arranged on the aluminum plate, the rivets are welded with the steel plate, and the connection of the aluminum plate and the steel plate is realized. However, the existing aluminum plate and steel plate connection scheme mostly has the problem of poor reliability. Therefore, how to better realize the connection of the rivet and the aluminum plate and the steel plate has become an urgent problem to be solved. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, the utility model provides a rivet, which can reduce the difficulty of the rivet leg extending into the prefabricated hole, facilitate the connection of the rivet with the first connecting piece and the second connecting piece, and increase the contact area of the rivet with the first connecting piece to ensure the reliability of the connection of the rivet with the first connecting piece.

[0004] The utility model further provides a hot rivet welding connection equipment, which is used for connecting the first connecting piece and the second connecting piece through the above-mentioned rivet.

[0005] The rivet according to the utility model embodiment comprises a rivet shoulder, a rivet leg, the rivet leg comprises a rivet leg body and a rivet leg tooth, the rivet leg body is connected to one end of the rivet shoulder in the axial direction and extends in the axial direction of the rivet shoulder, the rivet leg tooth is arranged on the outer peripheral wall of the rivet leg body and extends in the axial direction of the rivet shoulder, the rivet leg tooth is a plurality of, and the plurality of rivet leg teeth are arranged in the circumferential direction of the rivet leg body.

[0006] The rivet according to the utility model embodiment, by the rivet leg comprising the rivet leg body and the rivet leg tooth, the rivet leg tooth being arranged on the outer peripheral wall of the rivet leg body and extending in the axial direction of the rivet shoulder, the rivet leg tooth being a plurality of, and the plurality of rivet leg teeth being arranged in the circumferential direction of the rivet leg body and all being located in the prefabricated hole, on the one hand, in the process of driving the rivet to move towards the second connecting piece, on the basis of ensuring the connection of the rivet with the first connecting piece, the setting of the rivet leg tooth can reduce the riveting area of the rivet leg pressing into the first connecting piece, reduce the riveting force, reduce the difficulty of the rivet leg extending into the prefabricated hole, facilitate the riveting of the rivet with the first connecting piece, and facilitate the welding of the rivet with the second connecting piece; on the other hand, after the rivet leg has extended into the prefabricated hole, there is a gap between the adjacent two rivet leg teeth, and part of the softened first connecting piece can flow into the gap between the adjacent two rivet leg teeth, so that the contact area of the rivet with the first connecting piece can be increased, a good interlocking with the first connecting piece can be formed after the hot rivet welding is completed, the reliability of the connection of the rivet with the first connecting piece can be ensured, and the first connecting piece is prevented from rotating.

[0007] In addition, the rivet according to the utility model can also have the following additional technical features:

[0008] In some embodiments, the height of the rivet leg tooth is a in the radial direction of the rivet leg body, and 0mm < a ≤ 3mm is satisfied.

[0009] In some embodiments, the end of the rivet leg body away from the rivet shoulder is a spherical surface protruding towards the side away from the rivet shoulder.

[0010] In some embodiments, the end of the rivet leg tooth away from the rivet shoulder has a first guide slope, which is inclined towards the direction away from the axis of the rivet leg body in the direction of the rivet shoulder to the rivet leg body.

[0011] In some embodiments, the rivet leg body comprises a first body section and a second body section, which are arranged in sequence and connected in the direction of the rivet shoulder to the rivet leg body, the diameter of the second body section is smaller than that of the first body section, the rivet leg tooth is connected with the second body section, and the outer peripheral wall of the first body section and the outer peripheral wall of the second body section are connected by a second guide slope, which is inclined towards the direction away from the axis of the rivet leg body in the direction of the rivet shoulder to the rivet leg body.

[0012] In some embodiments, the side of the rivet shoulder towards the rivet leg body has a groove, which extends in the circumferential direction of the rivet leg body, and is located outside the rivet leg tooth in the radial direction of the rivet leg body.

[0013] In some embodiments, the rivet is a steel piece.

[0014] The hot riveting and welding connecting equipment according to the utility model embodiment is used for connecting a first connecting piece and a second connecting piece through the above-mentioned rivet, the first connecting piece is provided with a prefabricated hole, and the hot riveting and welding connecting equipment comprises a hot riveting and welding gun body, and an electrode assembly is arranged on the hot riveting and welding gun body and comprises a first electrode assembly and a second electrode assembly, the first electrode assembly and the second electrode assembly are oppositely arranged in a first direction and the distance therebetween is adjustable, the first connecting piece and the second connecting piece are stacked between the first electrode assembly and the second electrode assembly in the first direction, the first connecting piece is located on the side, away from the second electrode assembly, of the second connecting piece, and the prefabricated hole is oppositely arranged with the first electrode assembly.

[0015] According to the hot riveting and welding connecting equipment, the functions of riveting and welding are integrated on the hot riveting and welding connecting equipment, a single-process production process of riveting and welding integration is realized, in the connection of different materials of the first connecting piece and the second connecting piece, the positioning frequency can be reduced, the operation complexity can be reduced, the processing efficiency can be improved, the production and processing cost can be reduced, the quality problem of the riveting loose connection point area can be avoided, and the steel-aluminum multi-material white vehicle body can be produced on the traditional steel vehicle body production line, and the compatibility of the production line is improved.

[0016] In addition, the hot riveting and welding connecting equipment according to the utility model also has the following additional technical features.

[0017] In some embodiments, the first electrode assembly comprises: a guide rail pipe movably arranged on the hot riveting and welding gun body along a first direction, the guide rail pipe and the second electrode assembly are adapted to abut against the sides of the first connecting piece and the second connecting piece respectively, which are away from each other; an electrode rod movably arranged in the guide rail pipe along the first direction, the electrode rod is arranged opposite to the preformed hole, and the rivet is adapted to be arranged in the guide rail pipe and located on the side of the electrode rod facing the second electrode assembly.

[0018] In some embodiments, the side wall of the guide rail pipe has a rivet passing hole, and the hot riveting and welding connecting equipment further comprises: a rivet feeding system, the rivet feeding system comprises a rivet feeding pipe arranged on the guide rail pipe, the rivet feeding pipe is opposite to and communicates with the rivet passing hole, and is used for conveying the rivet into the guide rail pipe.

[0019] In some embodiments, the hot riveting and welding connecting equipment further comprises: a positioning system electrically connected with the hot riveting and welding gun body, used for detecting the position of the first connecting piece.

[0020] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0022] Figure 1 is the front view of the rivet according to the utility model embodiment;

[0023] Figure 2 is the bottom view of the rivet according to the utility model embodiment;

[0024] Figure 3is a perspective view of a hot rivet welding connection equipment according to an embodiment of the present utility model;

[0025] Figure 4 is a structure schematic view of a part of the hot rivet welding connection equipment according to an embodiment of the present utility model, wherein the guide rail pipe and the second electrode assembly clamp the first connecting piece and the second connecting piece;

[0026] Figure 5 is a structure schematic view of a part of the hot rivet welding connection equipment according to an embodiment of the present utility model, wherein the end of the rivet away from the rivet shoulder extends into the prefabricated hole;

[0027] Figure 6 is a structure schematic view of a part of the hot rivet welding connection equipment according to an embodiment of the present utility model, wherein the electrode rod moves to the second electrode assembly at the first speed to abut against the rivet;

[0028] Figure 7 is a structure schematic view of a part of the hot rivet welding connection equipment according to an embodiment of the present utility model, wherein the end of the rivet leg away from the rivet shoulder abuts against the second connecting piece;

[0029] Figure 8 is a structure schematic view of a part of the hot rivet welding connection equipment according to an embodiment of the present utility model, wherein the rivet shoulder abuts against the side surface of the first connecting piece away from the second connecting piece;

[0030] Figure 9 is a structure schematic view of a part of the hot rivet welding connection equipment according to an embodiment of the present utility model, wherein the depth of the welding core formed by the rivet and the second connecting piece reaches the preset depth;

[0031] Figure 10 is a structure schematic view of a part of the hot rivet welding connection equipment according to the first embodiment of the present utility model, wherein the current supplied to the electrode rod and the second electrode assembly is stopped, and the pressure applied by the electrode rod to the rivet is maintained;

[0032] Figure 11 is a structure schematic view of a part of the hot rivet welding connection equipment according to the second embodiment of the present utility model, wherein the second connecting piece is a multilayer steel plate;

[0033] Figure 12 is a structure schematic view of a part of the hot rivet welding connection equipment according to the third embodiment of the present utility model, wherein the second connecting piece is a pipe beam;

[0034] Figure 13 is a structure schematic view of a part of the hot rivet welding connection equipment according to the fourth embodiment of the present utility model, wherein the second connecting piece is a pipe beam.

[0035] Reference signs:

[0036] 100, hot rivet welding connecting device; 101, clamp pad;

[0037] 10, rivet;

[0038] 1, rivet shoulder; 11, groove;

[0039] 2, rivet leg; 21, rivet leg body; 211, first body segment; 212, second body segment; 213, second guide slope; 22, rivet leg tooth; 221, first guide slope;

[0040] 20, first connecting piece; 201, preformed hole;

[0041] 30, second connecting piece;

[0042] 40, hot rivet welding gun body; 41, body part; 42, connecting part;

[0043] 50, electrode assembly; 51, first electrode assembly; 511, guide rail pipe; 512, electrode rod; 513, rivet passing hole; 52, second electrode assembly;

[0044] 60, rivet feeding system; 61, rivet feeding pipe;

[0045] 70, positioning system. DETAILED DESCRIPTION

[0046] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0047] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0048] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0049] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] The rivet 10 according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0051] As shown in Figure 10 The rivet 10 according to the embodiments of the present application is used to connect the first connecting piece 20 and the second connecting piece 30, the first connecting piece 20 and the second connecting piece 30 are arranged in layers, the first connecting piece 20 is provided with a preformed hole 201, and the rivet 10 comprises a rivet shoulder 1 and a rivet leg 2.

[0052] Specifically, referring to the accompanying Figure 1 and the accompanying Figure 2 The rivet shoulder 1 is adapted to abut against one side of the first connecting piece 20 away from the second connecting piece 30 along the axial direction (referring to the first direction shown in the accompanying Figure 1 The rivet leg 2 comprises a rivet leg body 21 and a rivet leg tooth 22, the rivet leg body 21 is connected to one axial end of the rivet shoulder 1 and extends along the axial direction of the rivet shoulder 1, the rivet leg body 21 is arranged in the preformed hole 201, and one end of the rivet leg body 21 away from the rivet shoulder 1 is adapted to be connected to the second connecting piece 30, the rivet leg tooth 22 is arranged on the outer peripheral wall of the rivet leg body 21 and extends along the axial direction of the rivet shoulder 1, the rivet leg tooth 22 is a plurality of, the plurality of rivet leg teeth 22 are arranged in the circumferential direction of the rivet leg body 21 and are all located in the preformed hole 201.

[0053] It can be understood that, in the process of connecting the first connecting piece 20 and the second connecting piece 30 through the rivet 10, first, the rivet 10 is placed on the side of the first connecting piece 20 away from the second connecting piece 30, and the end of the rivet leg body 21 away from the rivet shoulder 1 is opposite to the preformed hole 201 of the first connecting piece 20, then pressure is applied to the rivet 10 and the rivet 10 is heated by electricity, the rivet 10 moves towards the second connecting piece 30 under the action of resistance heat and pressure, so that the rivet leg 2 extends into the preformed hole 201 until the side of the rivet shoulder 1 towards the rivet leg 2 is connected with the side of the first connecting piece 20 away from the second connecting piece 30, and the end of the rivet leg body 21 away from the rivet shoulder 1 is connected with the second connecting piece 30.

[0054] It can be understood that, on the one hand, in the process of driving the rivet 10 to move towards the second connecting piece 30, on the basis of ensuring the connection of the rivet 10 and the first connecting piece 20, the arrangement of the rivet leg teeth 22 can reduce the riveting area of the rivet leg 2 pressed into the first connecting piece 20, reduce the riveting force, reduce the difficulty of the rivet leg 2 extending into the preformed hole 201, facilitate the riveting of the rivet 10 and the first connecting piece 20, and facilitate the welding of the rivet 10 and the second connecting piece 30; on the other hand, after the rivet leg 2 extends into the preformed hole 201, there is a gap between the adjacent two rivet leg teeth 22, and the partially softened first connecting piece 20 can flow into the gap between the adjacent two rivet leg teeth 22, thereby increasing the contact area of the rivet 10 and the first connecting piece 20, forming good interlocking with the first connecting piece 20 after hot riveting and welding, ensuring the reliability of the connection of the rivet 10 and the first connecting piece 20, and preventing the first connecting piece 20 from rotating.

[0055] According to the rivet 10 of the embodiment of the utility model, the rivet leg 2 includes the rivet leg body 21 and the rivet leg teeth 22, the rivet leg teeth 22 are arranged on the outer peripheral wall of the rivet leg body 21 and extend along the axial direction of the rivet shoulder 1, the rivet leg teeth 22 are multiple, and the multiple rivet leg teeth 22 are arranged in the circumferential direction of the rivet leg body 21 and are all located in the preformed hole 201, on the one hand, in the process of driving the rivet 10 to move towards the second connecting piece 30, on the basis of ensuring the connection of the rivet 10 and the first connecting piece 20, the arrangement of the rivet leg teeth 22 can reduce the riveting area of the rivet leg 2 pressed into the first connecting piece 20, reduce the riveting force, reduce the difficulty of the rivet leg 2 extending into the preformed hole 201, facilitate the riveting of the rivet 10 and the first connecting piece 20, and facilitate the welding of the rivet 10 and the second connecting piece 30; on the other hand, after the rivet leg 2 extends into the preformed hole 201, there is a gap between the adjacent two rivet leg teeth 22, and the partially softened first connecting piece 20 can flow into the gap between the adjacent two rivet leg teeth 22, thereby increasing the contact area of the rivet 10 and the first connecting piece 20, forming good interlocking with the first connecting piece 20 after hot riveting and welding, ensuring the reliability of the connection of the rivet 10 and the first connecting piece 20, and preventing the first connecting piece 20 from rotating.

[0056] In some embodiments of this utility model, reference is made to the appendix. Figure 2 As shown, in the radially outward direction of the rivet body 21, the size of the rivet teeth 22 gradually decreases in the circumferential direction of the rivet body 21. This can further reduce the contact area between the rivet 2 and the inner wall of the pre-drilled hole 201 during the process of driving the rivet 10 to move toward the second connector 30. While ensuring the connection between the rivet 10 and the first connector 20, this reduces the riveting force, lowers the difficulty of the rivet 2 extending into the pre-drilled hole 201, facilitates the riveting of the rivet 10 and the first connector 20, and facilitates the welding of the rivet 10 and the second connector 30.

[0057] In some embodiments of this utility model, reference is made to the appendix. Figure 1 and attached Figure 2 As shown, along the radial direction of the rivet leg body 21 (see attached diagram) Figure 1 (As shown in the second direction), the height of the rivet tooth 22 is 'a', and satisfies: 0mm < a ≤ 3mm. This ensures the fit between the rivet 2 and the pre-drilled hole 201 when the rivet 10 cannot be precisely positioned due to special reasons, further ensuring the riveting interlock between the rivet 10 and the first connecting member 20, and ensuring the reliability of the connection between the rivet 10 and the first connecting member 20. For example, along the radial direction of the rivet body 21, the height 'a' of the rivet tooth 22 can be 0.2mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 2mm, 2.5mm, or 3mm.

[0058] In some embodiments of this utility model, reference is made to the appendix. Figure 1 As shown, along the axial direction of the rivet leg body 21 (see attached diagram). Figure 1 As shown in the first direction), the end of the rivet tooth 22 away from the rivet shoulder 1 is located on the side of the rivet body 21 away from the rivet shoulder 1, close to the rivet shoulder 1. It can be understood that, along the axial direction of the rivet body 21, the end of the rivet tooth 22 away from the rivet shoulder 1 is spaced apart from the end of the rivet body 21 away from the rivet shoulder 1, and the distance between the end of the rivet tooth 22 away from the rivet shoulder 1 and the rivet shoulder 1 is less than the distance between the end of the rivet body 21 away from the rivet shoulder 1 and the rivet shoulder 1. Thus, the part of the rivet body 21 that extends beyond the rivet tooth 22 in the axial direction can play a positioning role. Under the action of air pressure, the end of the rivet body 21 away from the rivet shoulder 1 first enters the pre-drilled hole 201 of the first connecting plate. Thus, the cooperation between the rivet body 21 and the pre-drilled hole 201 can provide precise positioning for the entire rivet 10, which is convenient for the subsequent connection of the rivet 10 with the first connecting member 20 and the second connecting member 30.

[0059] In some embodiments of this utility model, reference is made to the appendix. Figure 1As shown, the end of the rivet leg body 21 away from the rivet shoulder 1 is a convex spherical surface toward the side away from the rivet shoulder 1, and during the movement of the rivet 10 toward the second connecting piece 30, the convex point area in the center of the spherical surface can first contact the second connecting piece 30, and the structural glue commonly used in the welding between the first connecting piece 20 and the second connecting piece 30 can be extruded out, so that the structural glue can be prevented from remaining in the welding core during the subsequent welding of the rivet 10 and the second connecting piece 30, the welding core quality of the rivet 10 and the second connecting piece 30 can be effectively improved, and the reliability of the connection between the rivet 10 and the second connecting piece 30 can be improved.

[0060] It should be noted that the spherical radius of the spherical surface of the end of the rivet leg body 21 away from the rivet shoulder 1 is 50mm-1000mm, which can ensure the effective extrusion of the structural glue, further improve the welding core quality of the rivet 10 and the second connecting piece 30, improve the reliability of the connection between the rivet 10 and the second connecting piece 30, and ensure that the height of the rivet leg body 21 protruding from the surface of the first connecting piece 20 toward the second connecting piece 30 is within a certain range, so that the end surface of the rivet leg body 21 away from the rivet shoulder 1 forms a welding core, and better welding performance is obtained.

[0061] In some embodiments of the present application, reference is made to the accompanying drawings Figure 1 As shown, the end of the rivet leg tooth 22 away from the rivet shoulder 1 has a first guide slope 221, which is inclined toward the direction away from the axis of the rivet leg body 21 in the direction of the rivet leg body 21 to the rivet shoulder 1. The first guide slope 221 can provide a guide function for the softened first connecting piece 20 during hot rivet welding, so that the softened first connecting piece 20 can flow toward the rivet shoulder 1, the interlocking between the rivet 10 and the first connecting piece 20 can be strengthened after the cooling of the hot rivet welding is completed, the rivet point can obtain greater riveting force, the reliability of the connection between the rivet 10 and the first connecting piece 20 can be improved, and the rivet 10 and the first connecting piece 20 can be connected.

[0062] In some embodiments of the present application, reference is made to the accompanying drawings Figure 1As shown, the rivet leg body 21 comprises a first body segment 211 and a second body segment 212, the first body segment 211 and the second body segment 212 are arranged and connected in sequence in the direction from the rivet shoulder 1 to the rivet leg body 21, the diameter of the second body segment 212 is smaller than that of the first body segment 211, the rivet leg tooth 22 is connected with the second body segment 212, the outer peripheral wall of the first body segment 211 is connected with the outer peripheral wall of the second body segment 212 through the second guide slope 213, the second guide slope 213 is inclined in the direction away from the axis of the rivet leg body 21 in the direction from the rivet leg body 21 to the rivet shoulder 1, the setting of the second guide slope 213 can provide a guide effect for the softened first connecting piece 20 in the process of hot riveting, facilitate the softened first connecting piece 20 to flow in the direction close to the rivet shoulder 1, can strengthen the interlocking of the rivet 10 and the first connecting piece 20 after the cooling of the hot riveting is completed, so that the rivet point obtains greater riveting force, and the reliability of the connection between the rivet 10 and the first connecting piece 20 is improved.

[0063] In some embodiments of the utility model, reference is made to the accompanying drawings Figure 1 As shown, the side of the rivet shoulder 1 facing the rivet leg body 21 has a groove 11, the groove 11 extends along the circumferential direction of the rivet leg body 21, and along the radial direction of the rivet leg body 21, the groove 11 is located on the outer side of the rivet leg tooth 22, the setting of the groove 11 can provide space for the softened first connecting piece 20 in the process of driving the rivet 10 to move towards the second connecting piece 30, so as to increase the contact area between the rivet 10 and the first connecting piece 20, strengthen the interlocking of the rivet 10 and the first connecting piece 20 after the cooling of the hot riveting is completed, so that the rivet point obtains greater riveting force, and the reliability of the connection between the rivet 10 and the first connecting piece 20 is improved.

[0064] In some embodiments of the utility model, the rivet 10 is a steel piece, which has high strength, good durability and corrosion resistance, prolongs the service life of the rivet 10, ensures the reliability of the connection between the rivet 10 and the first connecting piece 20 and the second connecting piece 30, and the steel rivet 10 is easy to process, which can reduce the production cost of the rivet 10.

[0065] In one specific example, the first connecting piece 20 is an aluminum piece, and the second connecting piece 30 is a steel piece, it can be understood that the melting point of aluminum is lower than that of steel, when the steel rivet 10 is subjected to pressure and electric heating, the aluminum first connecting piece 20 will soften first, which facilitates the rivet 10 to enter the prefabricated hole 201 and realize the riveting of the rivet 10 and the first connecting piece 20, ensures the reliability and stability of the connection between the rivet 10 and the first connecting piece 20, and the rivet 10 and the second connecting piece 30 are both steel pieces, which can better realize the welding of the rivet 10 and the second connecting piece 30, and ensure the reliability and stability of the connection between the rivet 10 and the second connecting piece 30.

[0066] It should be noted that, compared with the semi-hollow rivets in the prior art, the rivet 10 of this utility model is a solid rivet 10, which makes the rivet 10 have higher structural strength and better durability, and can provide greater resistance and shear strength, ensuring the reliability of the connection between the rivet 10 and the first connecting member 20 and the second connecting member 30.

[0067] This utility model also proposes a hot riveting and welding connection device 100 for connecting a first connector 20 and a second connector 30 through the rivet 10 of the above embodiment. The first connector 20 is provided with a pre-drilled hole 201.

[0068] like Figure 3 As shown, the hot riveting welding connection device 100 according to an embodiment of the present invention includes a hot riveting welding gun body 40 and an electrode assembly 50. Specifically, refer to the attached drawing. Figure 3 As shown, the hot riveting gun body 40 includes a body portion 41 and a connecting portion 42, the body portion 41 being along a first direction (e.g., Figure 3 (As shown) The extension includes two connecting portions 42, which are respectively connected to both ends of the main body 41 along the first direction. The extension directions of the two connecting portions 42 are shown in the attached figure. Figure 3 The direction shown is the same as the direction of extension of the main body 41 (see attached diagram). Figure 3 The first direction shown is perpendicular to all directions.

[0069] Further, see attached document. Figure 4 As shown, the electrode assembly 50 is disposed on the hot riveting gun body 40 and includes a first electrode assembly 51 and a second electrode assembly 52. ​​The first electrode assembly 51 and the second electrode assembly 52 are arranged opposite to each other in a first direction and the distance between them is adjustable. The first electrode assembly 51 and the second electrode assembly 52 are respectively disposed at the ends of the two connecting portions 42 that are away from the body portion 41. Further, refer to the attached diagram... Figure 5 As shown, the first connector 20 and the second connector 30 are stacked between the first electrode assembly 51 and the second electrode assembly 52 along the first direction. The first connector 20 is located on the side of the second connector 30 that is away from the second electrode assembly 52. ​​The pre-made hole 201 is disposed opposite to the first electrode assembly 51.

[0070] It can be understood that when the hot riveting and welding gun body 40 is moved, the distance between the first electrode assembly 51 and the second electrode assembly 52 is sufficient to ensure that the first connecting piece 20 and the second connecting piece 30 can be located between the first electrode assembly 51 and the second electrode assembly 52. After the first electrode assembly 51 is opposite to the preformed hole 201, the first electrode assembly 51 and the second electrode assembly 52 can be clamped by reducing the distance between the first electrode assembly 51 and the second electrode assembly 52. The first electrode assembly 51 and the second electrode assembly 52 can jointly limit the first connecting piece 20 and the second connecting piece 30 from the side of the first connecting piece 20 and the second connecting piece 30 away from each other, respectively, to ensure the fixation of the hot riveting and welding connecting device 100 to the first connecting piece 20 and the second connecting piece 30, and to ensure the reliability of the subsequent connection of the rivet 10, the first connecting piece 20 and the second connecting piece 30.

[0071] It can be understood that since the preformed hole 201 is formed on the first connecting piece 20, the first electrode assembly 51 is arranged opposite to the preformed hole 201 when the hot riveting and welding gun body 40 is controlled to move, so as to accurately position the first connecting piece 20 and ensure the quality of subsequent hot riveting and welding, thereby improving the connection effect of the hot riveting and welding connecting device 100 to the first connecting piece 20 and the second connecting piece 30.

[0072] In related technologies, two processes are usually required to solve the problem of connecting dissimilar materials. The rivet is first riveted with the first connecting piece, and then the rivet is welded with the second connecting piece. Two devices are often required to complete the connection of dissimilar materials, resulting in a doubling of production costs. After riveting is completed, the rivet must protrude from the welding surface of the first connecting piece to better contact the welding surface of the second connecting piece. When the second connecting piece is welded with the rivet, the first connecting piece and the second connecting piece are usually clamped, which will cause the part of the rivet protruding from the first connecting piece to deform the second connecting piece, and will also cause the rivet to loosen from the first connecting piece, affecting the connection quality of the first connecting piece and the second connecting piece.

[0073] The utility model integrates the functions of riveting and welding on the hot riveting and welding connecting device 100, realizes a single-process production process integrating riveting and welding, and solves the problem of connecting dissimilar materials of the first connecting piece 20 and the second connecting piece 30. On the basis of ensuring the reliable connection of the first connecting piece 20 and the second connecting piece 30, the number of positioning is reduced, the operation complexity is reduced, the processing efficiency is improved, the production and processing cost is reduced, the quality problem of the riveting loosening and other connection points is avoided, and the co-linear production of steel-aluminum multi-material white car body on the traditional steel car body production line is realized, improving the compatibility of the production line.

[0074] According to the hot riveting and welding connecting equipment 100, the functions of riveting and welding are integrated on the hot riveting and welding connecting equipment 100, a single-process production process of riveting and welding integration is realized, in the problem of connecting different materials of the first connecting piece 20 and the second connecting piece 30, the positioning frequency can be reduced, the operation complexity can be reduced, the processing efficiency can be improved, the production and processing cost can be reduced, the quality problem of the riveting loose connection point area can be avoided, and the steel-aluminum multi-material white vehicle body can be produced on the traditional steel vehicle body production line, and the compatibility of the production line is improved.

[0075] In some embodiments of the utility model, reference is made to the accompanying drawings Figure 10 As shown in the drawings, the first electrode assembly 51 comprises a guide rail pipe 511 and an electrode rod 512, the guide rail pipe 511 is movably arranged on the hot riveting and welding gun body 40 along the first direction, the guide rail pipe 511 and the second electrode assembly 52 are adapted to abut against the sides of the first connecting piece 20 and the second connecting piece 30 away from each other respectively, the electrode rod 512 is movably arranged in the guide rail pipe 511 along the first direction, the electrode rod 512 is arranged opposite to the prefabricated hole 201, and the rivet 10 is adapted to be arranged in the guide rail pipe 511 and located on the side of the electrode rod 512 facing the second electrode assembly 52.

[0076] It can be understood that the guide rail pipe 511 and the second electrode assembly 52 can jointly act to clamp the first connecting piece 20 and the second connecting piece 30, the electrode rod 512 is used for applying pressure to the rivet 10 to drive the rivet 10 to move towards the direction close to the second connecting piece 30, and by passing current to the electrode rod 512 and the second electrode assembly 52, the rivet 10, the first connecting piece 20 and the second connecting piece 30 can be heated, so that the first connecting piece 20 is softened, the riveting of the rivet 10 and the first connecting piece 20, the welding of the rivet 10 and the first connecting piece 20, and the welding of the rivet 10 and the second connecting piece 30 are realized, thereby the reliability and stability of the rivet 10 connecting the first connecting piece 20 and the second connecting piece 30 can be improved.

[0077] Further, the first electrode assembly 51 further comprises a housing, a first driving member and a second driving member, the housing is arranged at the end of the connecting part 42 away from the body part 41 and extends along the first direction, the guide rail pipe 511 is arranged in the housing and is movable along the first direction, the electrode rod 512 is arranged in the guide rail pipe 511, the first driving member and the second driving member are both arranged in the housing, the first driving member is connected with the guide rail pipe 511 and the electrode rod 512, and is used for driving the guide rail pipe 511 and the electrode rod 512 to move relative to the housing at the same time, the second driving member is connected with the electrode rod 512, and is used for driving the electrode rod 512 to move relative to the guide rail pipe 511.

[0078] Preferably, the electrode rod 512 and the second electrode assembly 52 adopt a heat-resistant high-strength copper alloy, which has high strength, good heat resistance, good fatigue resistance and impact resistance, can withstand large pressure and wear, can guarantee the mechanical properties and purity of the electrode rod 512 and the second electrode assembly 52 in a high-temperature environment, reduce the possibility of plastic deformation and oxidation corrosion of the electrode rod 512 and the second electrode assembly 52, guarantee the reliability and stability of the electrode rod 512 and the second electrode assembly 52, and prolong the service life of the electrode rod 512 and the second electrode assembly 52, thereby guaranteeing the riveting and welding between the rivet 10, the first connecting piece 20 and the second connecting piece 30.

[0079] It should be noted that the electrode rod 512 is in clearance fit with the guide pipe 511 to guarantee that the electrode rod 512 is movable relative to the guide pipe 511 in the first direction, so as to realize that the electrode rod 512 applies pressure to the rivet 10 and passes current, and realizes that the hot rivet welding connection equipment 100 connects the first connecting piece 20 and the second connecting piece 30 through the rivet 10.

[0080] Preferably, the inner wall of the guide pipe 511 has an insulating wear-resistant layer, which has good insulation performance on the one hand, can effectively isolate the current, prevent the current in the electrode rod 512 from leaking and short circuit and other dangerous conditions, improve the safety performance of the hot rivet welding connection equipment 100, and on the other hand can withstand a certain friction and wear, guarantee the flatness and smoothness of the inner wall surface of the guide pipe 511, reduce friction loss, prolong the service life of the guide pipe 511, guarantee the cooperation of the guide pipe 511 and the electrode rod 512, improve the operation efficiency and stability of the hot rivet welding connection equipment 100, in addition, the guide pipe 511 needs to withstand a certain degree of pressure to cooperate with the second electrode assembly 52 to press the first connecting piece 20 and the second connecting piece 30 tightly, guarantee the stability of the hot rivet welding connection equipment 100 to connect the rivet 10, the first connecting piece 20 and the second connecting piece 30 subsequently.

[0081] In further embodiments of the present application, reference is made to the accompanying drawings Figure 3 and the accompanying drawings Figure 4 As shown in the accompanying drawings, the side wall of the guide pipe 511 has a rivet passing hole 513, and the hot rivet welding connection equipment 100 further comprises a rivet feeding system 60, the rivet feeding system 60 comprises a rivet feeding pipe 61, the rivet feeding pipe 61 is arranged on the guide pipe 511, the rivet feeding pipe 61 is opposite to and communicates with the rivet passing hole 513, and is used to convey the rivet 10 into the guide pipe 511. The rivet 10 is sent into the guide pipe 511 by the pipeline gas pressure of the rivet feeding pipe 61, and the rivet 10 is located on the side of the electrode rod 512 facing the first connecting piece 20. Under the action of the gas pressure, the part of the rivet leg body 21 in the axial direction beyond the rivet leg tooth 22 can enter the prefabricated hole 201, so as to realize accurate positioning of the rivet 10.

[0082] In some embodiments of the present application, reference is made to the accompanying drawingsFigure 3 As shown in the figure, the hot riveting and welding connecting device 100 further comprises a positioning system 70 electrically connected with the hot riveting and welding gun body 40, used for detecting the position of the first connecting piece 20, the positioning system 70 is a laser scanning positioning system 70, the position of the first connecting piece 20 is obtained through a laser sensor, and the profile boundary information of the first connecting piece 20 is collected to establish a coordinate system, so as to obtain the position of the preformed hole 201 on the first connecting piece 20, the positioning system 70 can transmit the collected information to the hot riveting and welding gun body 40, so that the hot riveting and welding gun body 40 moves towards the first connecting piece 20 and the second connecting piece 30, and the electrode rod 512 is opposite to the preformed hole 201.

[0083] For example, the positioning system 70 and the hot riveting and welding gun body 40 can be integrated on a robot, the first connecting piece 20 is accurately positioned by the positioning system 70, so that the center of the electrode rod 512 is aligned with the center of the preformed hole 201. It should be noted that when the first connecting piece 20 is manufactured, the consistency of the profile boundary information collected by the positioning system 70 and the relative position of the preformed hole 201 needs to be ensured.

[0084] In some embodiments of the present application, the first connecting piece 20 is an aluminum piece, and the second connecting piece 30 is a steel piece. It can be understood that since the rivet 10 is a steel piece, the melting point of aluminum is lower than that of steel. When the steel rivet 10 is subjected to pressure and electric heating, the aluminum first connecting piece 20 will soften first, so that the rivet 10 can enter the preformed hole 201, realizing riveting and welding of the rivet 10 and the first connecting piece 20, and guaranteeing the reliability and stability of the connection between the rivet 10 and the first connecting piece 20. The rivet 10 and the second connecting piece 30 are both steel pieces. During welding, the steel rivet 10 and the steel second connecting piece 30 are partially melted to form a steel welding core. The welding core does not contain aluminum, which can better guarantee the quality of the welding core and better realize the welding of the rivet 10 and the second connecting piece 30, and guarantee the reliability and stability of the connection between the rivet 10 and the second connecting piece 30.

[0085] For example, as shown in the figures, Figure 11 , Figure 12 and Figure 13 The first connecting piece 20 can be an aluminum alloy plate, and the second connecting piece 30 can be a single-layer steel plate, a multi-layer steel plate or a pipe beam. It should be noted that when the second connecting piece 30 is Figure 13The special-shaped steel pipe beam has certain rigidity and structural strength, can guarantee the reliability and stability of the second connecting piece 30, can guarantee that the second connecting piece 30 can withstand the pressure of hot riveting welding without deformation, and because the pipe beam is a special-shaped pipe beam, the jig pad 101 needs to be integrated on the jig, so that the jig pad 101 is located between the second electrode assembly 52 and the special-shaped pipe beam, and the jig pad 101 matches the shape of the special-shaped pipe beam, can avoid the movement of the pipe beam, and guarantee the fit of the first connecting piece 20 and the second connecting piece 30. In addition, the jig pad 101 is made of a material with good electrical conductivity, which can enable the current of the second electrode assembly 52 to pass through the jig pad 101 to the second connecting piece 30, and then to the first connecting piece 20 and the rivet 10, to form resistance heat and realize hot riveting and resistance spot welding.

[0086] Specifically, as Figures 4 to 13 indicated, the control method of the hot riveting and welding connection equipment 100 includes:

[0087] The position of the first connecting piece 20 is acquired, and the information collected by the positioning system 70 is transmitted to the hot riveting and welding gun body 40;

[0088] The hot riveting and welding gun body 40 is controlled to move, so that the first connecting piece 20 and the second connecting piece 30 are stacked between the first electrode assembly 51 and the second electrode assembly 52 along the first direction, and the electrode rod 512 is arranged opposite to the preformed hole 201;

[0089] As Figure 4 indicated, the guide rail pipe 511 is controlled to move towards the direction close to the second electrode assembly 52, so that the guide rail pipe 511 and the second electrode assembly 52 clamp the first connecting piece 20 and the second connecting piece 30, guarantee the fixation of the hot riveting and welding connection equipment 100 to the first connecting piece 20 and the second connecting piece 30, and guarantee the reliability of the subsequent connection of the hot riveting and welding connection equipment 100 to the rivet 10, the first connecting piece 20 and the second connecting piece 30;

[0090] As Figure 4 indicated, the rivet 10 is controlled to be delivered into the guide rail pipe 511 by the rivet delivery pipe 61, and under the action of air pressure, the end of the rivet leg 2 away from the rivet shoulder 1 enters the preformed hole 201, to realize the accurate positioning of the rivet 10;

[0091] As Figure 6 indicated, the electrode rod 512 is controlled to move towards the second electrode assembly 52 at a first speed until the electrode rod 512 abuts against the end of the rivet 10 away from the second electrode assembly 52, the electrode rod 512 is quickly moved to press the rivet 10, so that the electrode rod 512 and the second electrode assembly 52 jointly clamp the rivet 10 and the second connecting piece 30, and reach a certain riveting force, to realize the preliminary riveting of the rivet 10 to the first connecting piece 20;

[0092] like Figure 7 As shown, the control electrode rod 512 applies pressure P1 to the rivet 10, and current I1 is passed through the electrode rod 512 and the second electrode assembly 52 until the end of the rivet leg 2 away from the rivet shoulder 1 abuts against the second connector 30. Since the outer diameter of the rivet leg 2 is slightly larger than the diameter of the pre-drilled hole 201, a small current needs to be applied to the electrode rod 512 and the second electrode assembly 52 to generate resistance heat in the area near the pre-drilled hole 201 of the rivet 10 and the first connector 20, which softens the first connector 20 and helps to reduce the riveting force. The electrode rod 512 drives the rivet 10 to move toward the second electrode assembly 52 at a second speed. Under the combined action of resistance heat and pressure, the rivet leg 2 is pressed into the pre-drilled hole 201 until the pressure applied by the electrode rod 512 increases to a certain extent and the end of the rivet leg 2 away from the rivet shoulder 1 abuts against the second connector 30.

[0093] like Figure 8 As shown, the control electrode rod 512 applies pressure P2 to the rivet 10, and current I2 is passed through the electrode rod 512 and the second electrode assembly 52 until the rivet shoulder 1 abuts against the side surface of the first connector 20 opposite to the second connector 30, where P2 > P1 and I2 > I1. Increasing the pressure applied by the electrode rod 512 to the rivet 10 and increasing the current passed through the electrode rod 512 and the second electrode assembly 52, adjusting to the current / pressure parameters for resistance spot welding, generates resistance heat between the end of the rivet leg 2 opposite to the rivet shoulder 1 and the second connector 30, forming a resistance spot weld nugget. The end of the rivet leg 2 opposite to the rivet shoulder 1 gradually forms a weld nugget, and the rivet 10 continues to move towards the direction closer to the second electrode assembly 52 until the side surface of the rivet shoulder 1 facing the rivet leg 2 is pressed tightly against the side surface of the first connector 20 opposite to the second connector 30.

[0094] like Figure 9 As shown, the control electrode rod 512 applies pressure P3 to the rivet 10, and a current I3 is passed through the electrode rod 512 and the second electrode assembly 52 until the depth of the weld nugget formed between the rivet 10 and the second connecting member 30 reaches a preset depth, wherein P3≥P2, I3≥I2. In order to ensure the strength of the weld nugget formed between the rivet 10 and the second connecting member 30, the pressure applied by the electrode rod 512 to the rivet 10 is increased, the current passed through the electrode rod 512 and the second electrode assembly 52 is increased, and a certain welding time is maintained, thereby increasing the depth of the weld nugget formed between the rivet 10 and the second connecting member 30, so that the depth of the weld nugget formed between the rivet 10 and the second connecting member 30 reaches the preset depth.

[0095] like Figure 10As shown, the current supply to the electrode rod 512 and the second electrode assembly 52 is stopped, and the pressure applied by the electrode rod 512 to the rivet 10 is maintained, and after the depth of the weld nugget formed by the rivet 10 and the second connecting piece 30 reaches the preset depth, the current supply to the electrode rod 512 and the second electrode assembly 52 is stopped, and the pressure applied by the electrode rod 512 to the rivet 10 is maintained, so as to provide a certain cooling time for the weld nugget, so as to ensure good internal quality of the weld nugget, and meanwhile, the rivet 10 and the first connecting piece 20 can be cooled to form a stable interlocking riveting point.

[0096] Other configurations and operations of the rivet 10 and the hot riveting and welding connecting equipment 100 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail herein.

[0097] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0098] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A rivet, characterized in that, include: Riveted shoulders; The rivet includes a rivet body and rivet teeth. The rivet body is connected to one axial end of the rivet shoulder and extends along the axial direction of the rivet shoulder. The rivet teeth are disposed on the outer peripheral wall of the rivet body and extend along the axial direction of the rivet shoulder. There are multiple rivet teeth, and the multiple rivet teeth are arranged in the circumferential direction of the rivet body.

2. The rivet according to claim 1, characterized in that, Along the radial direction of the rivet body, the height of the rivet tooth is a, and satisfies: 0mm < a ≤ 3mm.

3. The rivet according to claim 1, characterized in that, The end of the rivet body opposite to the rivet shoulder is a spherical surface that protrudes toward the side opposite to the rivet shoulder.

4. The rivet according to claim 1, characterized in that, The end of the rivet tooth facing away from the rivet shoulder has a first guide slope, which is inclined in the direction from the rivet body to the rivet shoulder in a direction away from the axis of the rivet body.

5. The rivet according to claim 1, characterized in that, The rivet body includes a first body segment and a second body segment. In the direction from the rivet shoulder to the rivet body, the first body segment and the second body segment are arranged sequentially and connected. The diameter of the second body segment is smaller than the diameter of the first body segment. The rivet teeth are connected to the second body segment. The outer peripheral wall of the first body segment is connected to the outer peripheral wall of the second body segment through a second guide slope. In the direction from the rivet body to the rivet shoulder, the second guide slope is inclined in a direction away from the axis of the rivet body.

6. The rivet according to any one of claims 1-5, characterized in that, The rivet shoulder has a groove on the side facing the rivet leg body. The groove extends along the circumferential direction of the rivet leg body and along the radial direction of the rivet leg body. The groove is located outside the rivet leg tooth.

7. The rivet according to claim 1, characterized in that, The rivets are made of steel.

8. A hot riveting and welding connection device, characterized in that, For connecting a first connector and a second connector by a rivet according to any one of claims 1-7, wherein the first connector has a pre-drilled hole, the hot riveting and welding equipment comprises: The body of the hot riveting gun; An electrode assembly is disposed on the body of the hot riveting gun and includes a first electrode assembly and a second electrode assembly. The first electrode assembly and the second electrode assembly are arranged opposite to each other in a first direction and the distance between them is adjustable. A first connector and a second connector are stacked between the first electrode assembly and the second electrode assembly along the first direction. The first connector is located on the side of the second connector opposite to the second electrode assembly. The pre-drilled hole is arranged opposite to the first electrode assembly.

9. The hot riveting and welding connection equipment according to claim 8, characterized in that, The first electrode assembly includes: A guide tube is movably disposed on the body of the hot riveting gun along a first direction, and the guide tube and the second electrode assembly are respectively adapted to abut against the opposite sides of the first connector and the second connector. An electrode rod is movably disposed within the guide tube along a first direction. The electrode rod is disposed opposite to the pre-drilled hole. The rivet is adapted to be disposed within the guide tube and located on the side of the electrode rod facing the second electrode assembly.

10. The hot riveting and welding connection equipment according to claim 9, characterized in that, The guide rail tube has through-holes on its side wall, and the hot riveting connection equipment further includes: A rivet feeding system, comprising a rivet feeding tube disposed on the guide tube, the rivet feeding tube being opposite to and communicating with the rivet hole, for conveying the rivet into the guide tube.

11. The hot riveting and welding connection equipment according to claim 8, characterized in that, Also includes: A positioning system, electrically connected to the hot riveting gun body, is used to detect the position of the first connector.

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