Control method of hot rivet welding connection equipment

Abstract

The invention discloses a control method of hot rivet welding connecting equipment, the hot rivet welding connecting equipment is used for connecting a first connecting piece and a second connecting piece, the first connecting piece is provided with a prefabricated hole, the hot rivet welding connecting equipment comprises a hot rivet welding gun body and electrode assemblies, and the electrode assemblies comprise a first electrode assembly and a second electrode assembly. The distance between the first electrode assembly and the second electrode assembly is adjustable, and the control method comprises the steps that the hot riveting welding gun body is controlled to move, so that the first electrode assembly and the prefabricated hole are oppositely arranged; controlling the first electrode assembly and the second electrode assembly to clamp the first connecting piece and the second connecting piece; placing a rivet in the first electrode assembly; and the first electrode assembly is controlled to drive the rivet to move towards the second electrode assembly, current is introduced into the first electrode assembly and the second electrode assembly, and connection between the rivet and the second connecting piece is achieved. According to the control method of the hot rivet welding connection equipment, the operation complexity can be reduced, the machining efficiency can be improved, the production cost can be reduced, and the quality problem can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of connection, and in particular to a control method for hot riveting connection equipment. Background Art

[0002] In the related art, the problem of dissimilar metal connection is usually converted into the problem of homogeneous metal welding, which can achieve reliable connection between light metal and ultra-high strength steel. However, this method greatly increases the complexity of the process, the process is cumbersome, resulting in increased process costs and reduced production efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a control method for a hot riveting welding connection device, which can reduce the complexity of operation, improve processing efficiency, reduce production and processing costs, and avoid quality problems in the connection point area such as riveting looseness.

[0004] According to a control method of a hot riveting welding connection device in an embodiment of the present invention, the hot riveting welding connection device is used to connect a first connecting member and a second connecting member, a prefabricated hole is provided on the first connecting member, the hot riveting welding connection device includes a hot riveting welding gun body and an electrode assembly, the electrode assembly is arranged on the hot riveting welding gun body and includes a first electrode assembly and a second electrode assembly, the first electrode assembly and the second electrode assembly are relatively arranged in a first direction and the distance is adjustable, the control method includes: controlling the hot riveting welding gun body to move so that the first connecting member and the second connecting member are stacked between the first electrode assembly and the second electrode assembly along the first direction, and the first electrode assembly is relatively arranged with the prefabricated hole; controlling the first electrode assembly and the second electrode assembly to clamp the first connecting member and the second connecting member; placing a rivet in the first electrode assembly; controlling the first electrode assembly to drive the rivet to move toward the second electrode assembly, and passing current into the first electrode assembly and the second electrode assembly to achieve the connection between the rivet and the second connecting member.

[0005] According to the control method of the hot riveting welding connection device of the embodiment of the present invention, by integrating the functions of riveting and welding on the hot riveting welding connection device, a single-step production process of riveting and welding is realized. In terms of the problem of the connection of dissimilar materials between the first connection member and the second connection member, the number of positioning times can be reduced, the complexity of operation can be reduced, the processing efficiency can be improved, the production and processing costs can be reduced, and the quality problems of the connection point area such as riveting looseness can be avoided on the basis of ensuring the connection reliability of the first connection member and the second connection member. In addition, by opening a prefabricated hole on the first connection member, when controlling the movement of the hot riveting welding gun body, the first electrode assembly is arranged relative to the prefabricated hole, the first connection member can be accurately positioned, and the quality of subsequent hot riveting welding can be ensured, thereby improving the connection effect of the hot riveting welding connection device on the first connection member and the second connection member.

[0006] In addition, the control method of the hot riveting connection device according to the present invention may also have the following additional technical features:

[0007] In some embodiments, the first electrode assembly includes a guide rail tube and an electrode rod, the guide rail tube is movably disposed on the hot riveting welding gun body along a first direction, and the electrode rod is movably disposed in the guide rail tube along the first direction, and the controlling the first electrode assembly and the second electrode assembly to clamp the first connecting member and the second connecting member includes: controlling the guide rail tube to move in a direction close to the second electrode assembly, so that the guide rail tube and the second electrode assembly clamp the first connecting member and the second connecting member.

[0008] In some embodiments, controlling the first electrode assembly to drive the rivet to move toward the second electrode assembly, passing current through the first electrode assembly and the second electrode assembly to achieve connection between the rivet and the second connecting member includes: controlling the electrode rod to move toward the second electrode assembly at a first speed until the electrode rod abuts against an end of the rivet facing away from the second electrode assembly; controlling the electrode rod to move toward the second electrode assembly at a second speed, the second speed being less than the first speed, passing current through the electrode rod and the second electrode assembly to achieve connection between the rivet and the second connecting member.

[0009] In some embodiments, the rivet includes a rivet shoulder and a rivet leg, the rivet shoulder is located on a side of the first connecting member away from the second connecting member, the rivet leg is connected to a side of the rivet shoulder facing the second connecting member, the rivet leg is inserted into the prefabricated hole, and the electrode rod is controlled to move toward the second electrode assembly at a second speed, the second speed is less than the first speed, and current is supplied to the electrode rod and the second electrode assembly to achieve the connection between the rivet and the second connecting member, including: controlling the electrode rod to apply pressure P1 to the rivet, supplying current I1 to the electrode rod and the second electrode assembly, until the rivet leg is on the side away from the rivet shoulder. The end of the rivet abuts against the second connecting member; the electrode rod is controlled to apply a pressure P2 to the rivet, and a current I2 is passed through the electrode rod and the second electrode assembly until the rivet shoulder abuts against the surface of the first connecting member on the side facing away from the second connecting member, wherein P2>P1, I2>I1; the electrode rod is controlled to apply a pressure P3 to the rivet, and a current I3 is passed through the electrode rod and the second electrode assembly until the depth of the weld nugget formed by the rivet and the second connecting member reaches a preset depth, wherein P3≥P2, I3≥I2; the current is stopped from being passed through the electrode rod and the second electrode assembly, and the pressure applied by the electrode rod to the rivet is maintained.

[0010] In some embodiments, the hot riveting welding connection equipment also includes a positioning system, and the positioning system is electrically connected to the hot riveting welding gun body. When controlling the movement of the hot riveting welding gun body so that the first connecting member and the second connecting member are stacked between the first electrode assembly and the second electrode assembly along a first direction, and before the first electrode assembly is arranged relative to the prefabricated hole, the control method also includes: obtaining the position of the first connecting member.

[0011] In some embodiments, the hot riveting connection equipment also includes a nail feeding system, the nail feeding system includes a nail feeding tube, the nail feeding tube is connected to the first electrode assembly, and the placing of rivets in the first electrode assembly includes: controlling the nail feeding tube to transport the rivet into the first electrode assembly.

[0012] In some embodiments, the rivet is a steel piece, the first connecting piece is an aluminum piece, and the second connecting piece is a steel piece.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 is a first flow chart of a control method of a heat riveting connection device according to an embodiment of the present invention;

[0016] Figure 2 is a second flow chart of a control method of a hot riveting connection device according to an embodiment of the present invention;

[0017] Figure 3 is a three-dimensional diagram of a heat riveting connection device according to an embodiment of the present invention;

[0018] Figure 4 is a partial structural schematic diagram of a heat riveting connection device according to an embodiment of the present invention, wherein the guide rail tube and the second electrode assembly clamp the first connection member and the second connection member;

[0019] Figure 5 is a partial structural schematic diagram of a hot riveting connection device according to an embodiment of the present invention, wherein an end of the rivet away from the rivet shoulder extends into the prefabricated hole;

[0020] Figure 6 is a partial structural schematic diagram of a heat riveting connection device according to an embodiment of the present invention, wherein the electrode rod moves toward the second electrode assembly at a first speed until it abuts against the rivet;

[0021] Figure 7 is a partial structural schematic diagram of a hot riveting connection device according to an embodiment of the present invention, wherein an end of the rivet leg away from the rivet shoulder abuts against the second connection member;

[0022] Figure 8 is a partial structural schematic diagram of a heat riveting connection device according to an embodiment of the present invention, wherein the rivet shoulder abuts against a surface of a side of the first connection member that is away from the second connection member;

[0023] Fig. 9 is a partial structural schematic diagram of a hot riveting connection device according to an embodiment of the present invention, wherein the depth of the weld nugget formed by the rivet and the second connecting member reaches a preset depth;

[0024] Fig.10 is a partial structural schematic diagram of a heat riveting connection device according to a first embodiment of the present invention, wherein the current is stopped from being supplied to the electrode rod and the second electrode assembly, and the pressure applied by the electrode rod to the rivet is maintained;

[0025] Fig.11 is a partial structural schematic diagram of a hot riveting connection device according to a second embodiment of the present invention, wherein the second connection member is a multi-layer steel plate;

[0026] Fig.12 is a partial structural schematic diagram of a heat riveting connection device according to a third embodiment of the present invention, wherein the second connection member is a pipe beam;

[0027] Fig.13 1 is a partial structural schematic diagram of a heat riveting connection device according to a fourth embodiment of the present invention, wherein the second connection member is a tubular beam.

[0028] Reference numerals:

[0029] 100. Hot riveting connection equipment; 101. Clamp pad;

[0030] 10. Rivets;

[0031] 1. Riveted shoulders;

[0032] 2. Riveting leg; 21. Riveting leg body; 22. Riveting leg teeth;

[0033] 20. First connecting member; 201. Prefabricated hole;

[0034] 30. A second connecting member;

[0035] 40. hot riveting welding gun body; 41. body portion; 42. connecting portion;

[0036] 50, electrode assembly; 51, first electrode assembly; 511, guide rail tube; 512, electrode rod; 513, nail hole; 52, second electrode assembly;

[0037] 60. Nail feeding system; 61. Nail feeding tube;

[0038] 70. Positioning system. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The following describes a control method of the heat riveting connection device 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0044] like Figure 3 As shown, the hot riveting welding connection device 100 according to an embodiment of the present invention is used to connect a first connection member 20 and a second connection member 30 , a prefabricated hole 201 is provided on the first connection member 20 , and the hot riveting welding connection device 100 includes a hot riveting welding gun body 40 and an electrode assembly 50 .

[0045] Specifically, refer to the attached Figure 3 As shown, the hot riveting welding gun body 40 includes a body portion 41 and a connecting portion 42. The body portion 41 is arranged along a first direction (such as Figure 3 There are two connecting parts 42, which are respectively connected to the two ends of the main body 41 along the first direction. The extending direction of the two connecting parts 42 (see attached Figure 3 The third direction shown in FIG. 1 is the same as the extension direction of the main body 41 (see FIG. Figure 1 Further, referring to the attached Fig.10 As shown, the electrode assembly 50 is arranged on the hot riveting welding 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 arranged at one end of the two connecting parts 42 away from the main body part 41.

[0046] like Figure 1 As shown, the control method includes:

[0047] The hot riveting welding gun body 40 is controlled to move so that the first connecting member 20 and the second connecting member 30 are stacked between the first electrode assembly 51 and the second electrode assembly 52 along the first direction, and the first electrode assembly 51 is arranged opposite to the prefabricated hole 201. It can be understood that when the hot riveting welding gun body 40 is controlled to move, by ensuring that the distance between the first electrode assembly 51 and the second electrode assembly 52 is sufficient, the first connecting member 20 and the second connecting member 30 can be conveniently located between the first electrode assembly 51 and the second electrode assembly 52, and the hot riveting welding connection device 100 can be conveniently used to operate the first connecting member 20 and the second connecting member 30 in the subsequent operation;

[0048] The first electrode assembly 51 and the second electrode assembly 52 are controlled to clamp the first connecting member 20 and the second connecting member 30. It can be understood that, if Figure 4 As shown, after the first electrode assembly 51 is aligned with the prefabricated hole 201, the first electrode assembly 51 and the second electrode assembly 52 can be clamped by the first electrode assembly 51 and the second electrode assembly 52 by reducing the distance between them, so that the first electrode assembly 51 and the second electrode assembly 52 can limit the first connection member 20 and the second connection member 30 from the sides of the first connection member 20 and the second connection member 30 away from each other, respectively, to ensure the fixation of the first connection member 20 and the second connection member 30 by the hot riveting connection device 100, and to ensure the reliability of the subsequent connection of the rivet 10, the first connection member 20 and the second connection member 30 by the hot riveting connection device 100;

[0049] A rivet 10 is placed in the first electrode assembly 51. It should be noted that Figure 4 and Figure 5 As shown, the rivet 10 may be delivered to the first electrode assembly 51 through an additional structure, or the rivet 10 may be directly manually placed into the first electrode assembly 51, which is not limited here.

[0050] The first electrode assembly 51 is controlled to drive the rivet 10 to move toward the second electrode assembly 52, and current is passed through the first electrode assembly 51 and the second electrode assembly 52 to achieve the connection between the rivet 10 and the second connecting member 30. Through the joint action of the first electrode assembly 51 and the second electrode assembly 52, the rivet 10 is pressed into the prefabricated hole 201 under the joint action of resistance heat and pressure, thereby achieving riveting, welding, and welding of the rivet 10 and the first connecting member 20, thereby improving the reliability and stability of the rivet 10 connecting the first connecting member 20 and the second connecting member 30.

[0051] It should be noted that, compared with the semi-hollow rivet in the prior art, the rivet 10 of the present invention is a solid rivet 10, so that the rivet 10 has higher structural strength and better durability, can provide greater resistance and shear strength, and ensure the reliability of the rivet 10 connecting the first connecting member 20 and the second connecting member 30.

[0052] It is understandable that if Figure 5 As shown, since a prefabricated hole 201 is provided on the first connecting member 20, when the movement of the hot riveting welding gun body 40 is controlled, the first electrode assembly 51 is arranged relative to the prefabricated hole 201, so that the first connecting member 20 can be accurately positioned to ensure the quality of subsequent hot riveting welding, thereby improving the connection effect of the hot riveting welding connection device 100 on the first connecting member 20 and the second connecting member 30.

[0053] In the related art, two processes are usually required to solve the problem of connecting dissimilar materials. First, the rivet is riveted to the first connecting member, and then the rivet is welded to the second connecting member. Two devices are often required to complete the connection of dissimilar materials, which increases the production cost exponentially. In addition, after the riveting is completed, the rivet must protrude from the surface to be welded of the first connecting member to better contact the surface to be welded of the second connecting member. When welding the second connecting member to the rivet, it is usually necessary to clamp both the first connecting member and the second connecting member, which will cause the part of the rivet protruding from the first connecting member to push the second connecting member to deform, and will also cause the connection between the rivet and the first connecting member to loosen, affecting the connection quality between the first connecting member and the second connecting member.

[0054] The present invention integrates the functions of riveting and welding on the hot riveting and welding connection equipment 100 to realize a single-step production process that integrates riveting and welding. As for the problem of the connection of dissimilar materials between the first connecting member 20 and the second connecting member 30, it can reduce the number of positioning times, reduce the complexity of operation, improve processing efficiency, reduce production and processing costs, and avoid quality problems in the connection point area such as loose riveting on the basis of ensuring the connection reliability of the first connecting member 20 and the second connecting member 30. It can also realize the co-production of steel and aluminum multi-material white bodies on the production line of traditional steel bodies, thereby improving the compatibility of the production line.

[0055] In a specific example, the rivet 10 is a steel rivet 10, the first connecting member 20 is an aluminum alloy plate, and the second connecting member 30 is ultra-high strength steel. The present invention rivets the aluminum alloy plate with a solid steel rivet 10 through a hot riveting process, and welds the aluminum alloy plate with the rivet 10 and the ultra-high strength steel together through resistance spot welding to form a steel spot welding core with reliable quality, and finally realizes the connection of dissimilar materials of the aluminum plate and the ultra-high strength steel, filling the gap in the industry.

[0056] According to the control method of the hot riveting welding connection device 100 of the embodiment of the present invention, by integrating the functions of riveting and welding on the hot riveting welding connection device 100, a single-step production process of riveting and welding integration is realized. In terms of the problem of the connection of dissimilar materials between the first connection member 20 and the second connection member 30, the number of positioning times can be reduced, the complexity of operation can be reduced, the processing efficiency can be improved, the production and processing costs can be reduced, and the quality problems of the connection point area such as riveting looseness can be avoided on the basis of ensuring the connection reliability of the first connection member 20 and the second connection member 30. In addition, by opening a prefabricated hole 201 on the first connection member 20, when controlling the movement of the hot riveting welding gun body 40, the first electrode assembly 51 is arranged relative to the prefabricated hole 201, so that the first connection member 20 can be accurately positioned, the quality of subsequent hot riveting welding can be ensured, and the connection effect of the hot riveting welding connection device 100 on the first connection member 20 and the second connection member 30 can be improved.

[0057] In some embodiments of the present invention, Fig.10 As shown, the first electrode assembly 51 includes a guide rail tube 511 and an electrode rod 512. The guide rail tube 511 is movably arranged on the hot riveting welding gun body 40 along a first direction. The guide rail tube 511 and the second electrode assembly 52 are respectively suitable for abutting against the sides of the first connecting member 20 and the second connecting member 30 that are away from each other. The electrode rod 512 is movably arranged in the guide rail tube 511 along the first direction. The electrode rod 512 is arranged opposite to the prefabricated hole 201. The rivet 10 is suitable for being arranged in the guide rail tube 511 and is located on the side of the electrode rod 512 facing the second electrode assembly 52.

[0058] It can be understood that the guide tube 511 and the second electrode assembly 52 can work together to clamp the first connecting member 20 and the second connecting member 30, and the electrode rod 512 is used to apply pressure to the rivet 10 to drive the rivet 10 to move in a direction close to the second connecting member 30, and by passing current through the electrode rod 512 and the second electrode assembly 52, the rivet 10, the first connecting member 20 and the second connecting member 30 can be heated to soften the first connecting member 20, thereby realizing riveting, welding and welding of the rivet 10 and the first connecting member 20, and the second connecting member 30, thereby improving the reliability and stability of the rivet 10 connecting the first connecting member 20 and the second connecting member 30.

[0059] Furthermore, the first electrode assembly 51 also includes a shell, a first driving member and a second driving member. The shell is arranged at one end of the connecting portion 42 away from the main body portion 41 and extends along the first direction. The guide rail tube 511 is passed through the shell and is movable along the first direction. The electrode rod 512 is arranged in the guide rail tube 511. The first driving member and the second driving member are both arranged in the shell. The first driving member is connected to the guide rail tube 511 and the electrode rod 512, and is used to drive the guide rail tube 511 and the electrode rod 512 to move relative to the shell at the same time. The second driving member is connected to the electrode rod 512, and is used to drive the electrode rod 512 to move relative to the guide rail tube 511.

[0060] Preferably, the electrode rod 512 and the second electrode assembly 52 are made of heat-resistant high-strength copper alloy, which has high strength, good heat resistance, good fatigue resistance and impact resistance, can withstand greater pressure and wear, and can ensure 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 oxidative corrosion of the electrode rod 512 and the second electrode assembly 52, ensure the reliability and stability of the electrode rod 512 and the second electrode assembly 52, and extend the service life of the electrode rod 512 and the second electrode assembly 52, thereby ensuring the riveting and welding between the rivet 10, the first connecting member 20 and the second connecting member 30.

[0061] It should be noted that the electrode rod 512 and the guide tube 511 are clearance-matched to ensure that the electrode rod 512 can move relative to the guide tube 511 along the first direction, so that the electrode rod 512 applies pressure to the rivet 10 and passes current, so that the hot riveting connection device 100 connects the first connecting member 20 and the second connecting member 30 through the rivet 10.

[0062] Preferably, the inner wall of the guide rail tube 511 has an insulating wear-resistant layer. On the one hand, it has good insulation performance and can effectively isolate the current to prevent dangerous situations such as current leakage and short circuit in the electrode rod 512, thereby improving the safety performance of the hot riveting welding connection equipment 100. On the other hand, it can withstand certain friction and wear to ensure the flatness and smoothness of the inner wall surface of the guide rail tube 511, reduce wear and friction loss, extend the service life of the guide rail tube 511, ensure the coordination between the guide rail tube 511 and the electrode rod 512, and improve the operating efficiency and stability of the hot riveting welding connection equipment 100. In addition, the guide rail tube 511 needs to be able to withstand a certain degree of pressure to cooperate with the second electrode assembly 52 to press the first connecting member 20 and the second connecting member 30, thereby ensuring the stability of the subsequent connection between the rivet 10, the first connecting member 20 and the second connecting member 30 by the hot riveting welding connection equipment 100.

[0063] In a further embodiment of the present invention, controlling the first electrode assembly 51 and the second electrode assembly 52 to clamp the first connecting member 20 and the second connecting member 30 includes:

[0064] The guide rail tube 511 is controlled to move toward the direction close to the second electrode assembly 52, so that the guide rail tube 511 and the second electrode assembly 52 clamp the first connecting member 20 and the second connecting member 30. It can be understood that Figure 4 As shown, after the electrode rod 512 is aligned with the prefabricated hole 201, the distance between the guide rail tube 511 and the second electrode assembly 52 is reduced by moving the guide rail tube 511, so that the guide rail tube 511 and the second electrode assembly 52 clamp the first connecting member 20 and the second connecting member 30, so that the guide rail tube 511 and the second electrode assembly 52 can respectively limit the first connecting member 20 and the second connecting member 30 from the side away from each other of the first connecting member 20 and the second connecting member 30, thereby ensuring the fixation of the first connecting member 20 and the second connecting member 30 by the hot riveting connection device 100 and ensuring the reliability of the subsequent connection of the rivet 10, the first connecting member 20 and the second connecting member 30 by the hot riveting connection device 100.

[0065] In a further embodiment of the present invention, controlling the first electrode assembly 51 to drive the rivet 10 to move toward the second electrode assembly 52, passing current through the first electrode assembly 51 and the second electrode assembly 52, and achieving connection between the rivet 10 and the second connector 30 includes:

[0066] like Figure 6 As shown, the electrode rod 512 is controlled to move toward the second electrode assembly 52 at a first speed until the electrode rod 512 abuts against the end of the rivet 10 that is away from the second electrode assembly 52, and the electrode rod 512 moves quickly to press the rivet 10, so that the electrode rod 512 and the second electrode assembly 52 clamp the rivet 10 and the second connecting member 30 together, and a certain riveting force is reached, so that the rivet 10 and the first connecting member 20 are initially riveted;

[0067] The electrode rod 512 is controlled to move toward the second electrode assembly 52 at a second speed, which is less than the first speed. Current is passed through the electrode rod 512 and the second electrode assembly 52 to achieve the connection between the rivet 10 and the second connecting member 30. Pressure is continuously applied to the rivet 10 in the direction of the second electrode assembly 52 through the electrode rod 512, and current is passed through the electrode rod 512 and the second electrode assembly 52. ​​The rivet 10 can be pressed into the prefabricated hole 201 under the combined action of resistance heat and pressure, thereby finally achieving the connection between the rivet 10 and the first connecting member 20 and the second connecting member 30.

[0068] In a further embodiment of the present invention, referring to the attached Fig.10As shown, the rivet 10 includes a rivet shoulder 1 and a rivet leg 2. The rivet shoulder 1 is located on the side of the first connecting member 20 that faces away from the second connecting member 30, and the rivet leg 2 is connected to the side of the rivet shoulder 1 that faces the second connecting member 30. The rivet leg 2 is inserted into the prefabricated hole 201. It can be understood that in the process of connecting the first connecting member 20 and the second connecting member 30 through the rivet 10, the rivet 10 is first placed on the side of the first connecting member 20 that faces away from the second connecting member 30, and the end of the rivet leg 2 that faces away from the rivet shoulder 1 is opposite to the prefabricated hole 201 of the first connecting member 20. Then, pressure is applied to the rivet 10 and it is electrically heated. Under the action of resistance heat and pressure, the rivet 10 moves toward the direction close to the second connecting member 30, so that the rivet leg 2 extends into the prefabricated hole 201 until the side of the rivet shoulder 1 facing the rivet leg 2 is connected to the side of the first connecting member 20 that faces away from the second connecting member 30, and the end of the rivet leg 2 that faces away from the rivet shoulder 1 is connected to the second connecting member 30.

[0069] Further, see Attachment Fig.10 As shown, the rivet leg 2 includes 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 (see attached Fig.10 The rivet leg body 21 is extended in the prefabricated hole 201, and the end of the rivet leg body 21 away from the rivet shoulder 1 is suitable for connecting with the second connecting member 30. 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. There are multiple rivet leg teeth 22, which are arranged in the circumferential direction of the rivet leg body 21 and are all located in the prefabricated hole 201.

[0070] It can be understood that, on the one hand, in the process of driving the rivet 10 to move toward the second connecting member 30, on the basis of ensuring the connection between the rivet 10 and the first connecting member 20, the setting of the rivet leg teeth 22 can reduce the riveting area of ​​the rivet leg 2 pressed into the first connecting member 20, reduce the riveting force, and reduce the difficulty of the rivet leg 2 extending into the prefabricated hole 201, thereby facilitating the riveting of the rivet 10 and the first connecting member 20, and facilitating the welding of the rivet 10 and the second connecting member 30; on the other hand, after the rivet leg 2 has been extended into the prefabricated hole 201, there is a gap between two adjacent rivet leg teeth 22, and the partially softened first connecting member 20 can flow into the gap between the two adjacent rivet leg teeth 22, thereby increasing the contact area between the rivet 10 and the first connecting member 20, and forming a good interlock with the first connecting member 20 after the hot riveting is completed, thereby ensuring the reliability of the connection between the rivet 10 and the first connecting member 20 and preventing the first connecting member 20 from rotating.

[0071] In a further embodiment of the present invention, Figure 2As shown, controlling the electrode rod 512 to move toward the second electrode assembly 52 at a second speed, the second speed being less than the first speed, and applying current to the electrode rod 512 and the second electrode assembly 52 to achieve connection between the rivet 10 and the second connecting member 30 includes:

[0072] The electrode rod 512 is controlled to apply 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 connecting member 30. Figure 7 As shown, since the outer diameter of the rivet leg 2 is slightly larger than the diameter of the prefabricated hole 201, it is necessary to connect a small current to the electrode rod 512 and the second electrode assembly 52, so that the area near the prefabricated hole 201 of the rivet 10 and the first connecting member 20 generates resistance heat, so that the first connecting member 20 softens, which is conducive to reducing the riveting force. The electrode rod 512 drives the rivet 10 to move toward the second electrode assembly 52 at a second speed, and the rivet leg 2 is pressed into the prefabricated hole 201 under the combined action of resistance heat and pressure 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 connecting member 30;

[0073] The electrode rod 512 is controlled to apply 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 surface of the first connecting member 20 that faces away from the second connecting member 30, wherein P2>P1, I2>I1. Figure 8 As shown, 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 the current / pressure parameters of resistance spot welding are adjusted, and resistance heat is generated between the end of the rivet leg 2 away from the rivet shoulder 1 and the second connecting member 30 to form a resistance spot welding nugget, and the end of the rivet leg 2 away from the rivet shoulder 1 gradually forms a molten nugget, and the rivet 10 continues to move toward the direction close to the second electrode assembly 52 until the side surface of the rivet shoulder 1 facing the rivet leg 2 is pressed against the side surface of the first connecting member 20 away from the second connecting member 30;

[0074] The electrode rod 512 is controlled to apply a 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 by the rivet 10 and the second connecting member 30 reaches a preset depth, wherein P3≥P2, I3≥I2. Fig. 9 As shown, 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, so that the depth of the weld nugget formed between the rivet 10 and the second connecting member 30 can be increased, so that the depth of the weld nugget formed between the rivet 10 and the second connecting member 30 reaches a preset depth;

[0075] like Fig.10 As shown, stop supplying current to the electrode rod 512 and the second electrode assembly 52, maintain the pressure applied by the electrode rod 512 to the rivet 10, and after the depth of the weld core formed by the rivet 10 and the second connecting member 30 reaches a preset depth, stop supplying current to the electrode rod 512 and the second electrode assembly 52, and maintain the pressure applied by the electrode rod 512 to the rivet 10, so as to provide a certain cooling time for the weld core, ensure good internal quality of the weld core, and enable the rivet 10 and the first connecting member 20 to cool down to form a stable interlocking riveting point.

[0076] In a further embodiment of the present invention, referring to the attached Figure 4 As shown, the end of the rivet leg 2 facing away from the rivet shoulder 1 is a spherical surface protruding toward the side facing away from the rivet shoulder 1. During the movement of the rivet 10 toward the second connecting member 30, the convex area in the center of the spherical surface can first contact the second connecting member 30, thereby squeezing out the structural adhesive commonly used in welding between the first connecting member 20 and the second connecting member 30. During the subsequent welding process of the rivet 10 and the second connecting member 30, the structural adhesive can be prevented from remaining inside the weld core, which can effectively improve the weld core quality of the rivet 10 and the second connecting member 30 and improve the reliability of the connection between the rivet 10 and the second connecting member 30.

[0077] It should be noted that the spherical radius of the spherical surface of the end of the rivet leg 2 facing away from the rivet shoulder 1 is 50mm-1000mm, which can ensure the effective discharge of the structural adhesive, further improve the quality of the weld core between the rivet 10 and the second connecting member 30, improve the reliability of the connection between the rivet 10 and the second connecting member 30, ensure that the height of the rivet leg 2 protruding from the first connecting member 20 toward the second connecting member 30 is within a certain range, ensure that the end surface of the rivet leg 2 facing away from the rivet shoulder 1 forms a weld core, and obtain better welding point performance.

[0078] In some embodiments of the present invention, Figure 3 As shown, the hot riveting welding device 100 further includes a positioning system 70, which is electrically connected to the hot riveting welding gun body 40. Before controlling the hot riveting welding gun body 40 to move so that the first connecting member 20 and the second connecting member 30 are stacked between the first electrode assembly 51 and the second electrode assembly 52 along the first direction and the first electrode assembly 51 is arranged relative to the prefabricated hole 201, the control method further includes:

[0079] The position of the first connecting member 20 is obtained. The positioning system 70 is a laser scanning positioning system 70. The position of the first connecting member 20 is obtained by a laser sensor, and the contour boundary information of the first connecting member 20 is collected to establish a coordinate system, so as to obtain the position of the prefabricated hole 201 on the first connecting member 20. The positioning system 70 can transmit the collected information to the hot riveting welding gun body 40, so that the hot riveting welding gun body 40 moves toward the first connecting member 20 and the second connecting member 30, and ensures that the electrode rod 512 is opposite to the prefabricated hole 201.

[0080] For example, the positioning system 70 and the hot riveting welding gun body 40 may be integrated on a robot, and the first connecting member 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 prefabricated hole 201. It should be noted that when the first connecting member 20 is manufactured, it is necessary to ensure the consistency of the contour boundary information collected by the positioning system 70 and the relative position of the prefabricated hole 201.

[0081] In some embodiments of the present invention, Figure 3 and attached Figure 4 As shown, the side wall of the guide rail tube 511 has a nail hole 513, and the hot riveting connection device 100 also includes a nail feeding system 60, and the nail feeding system 60 includes a nail feeding tube 61, and the nail feeding tube 61 is connected to the first electrode assembly 51. Placing the rivet 10 in the first electrode assembly 51 includes:

[0082] The rivet feeding tube 61 is controlled to convey the rivet 10 into the first electrode assembly 51. Specifically, the first electrode assembly 51 includes a guide rail tube 511 and an electrode rod 512. The rivet 10 is conveyed into the guide rail tube 511 by the pipeline air pressure of the rivet feeding tube 61, and the rivet 10 is located on the side of the electrode rod 512 facing the first connecting member 20. Under the action of air pressure propulsion, the end of the rivet leg 2 facing away from the rivet shoulder 1 enters the prefabricated hole 201, thereby realizing the precise positioning of the rivet 10.

[0083] In some embodiments of the present invention, the rivet 10 is a steel part with high strength, good durability and corrosion resistance, which extends the service life of the rivet 10 and ensures the reliability of the connection between the rivet 10 and the first connecting member 20 and the second connecting member 30. In addition, the steel rivet 10 is easy to process, which can reduce the production cost of the rivet 10.

[0084] Furthermore, the first connecting member 20 is an aluminum member, and the second connecting member 30 is a steel member. It can be understood that the melting point of aluminum is lower than that of steel. When pressure is applied to the steel rivet 10 and electric heating is applied, the aluminum first connecting member 20 will soften first, making it easier for the rivet 10 to enter the prefabricated hole 201, thereby achieving riveting and welding of the rivet 10 and the first connecting member 20, and ensuring the reliability and stability of the connection between the rivet 10 and the first connecting member 20. Both the rivet 10 and the second connecting member 30 are steel members. During the welding process, the steel rivet 10 and the steel second connecting member 30 are locally melted to form a steel weld core. The weld core does not contain aluminum, which can better ensure the quality of the weld core, better achieve welding of the rivet 10 and the second connecting member 30, and ensure the reliability and stability of the connection between the rivet 10 and the second connecting member 30.

[0085] For example, Fig.11 , Fig.12 and Fig.13 As shown, the first connecting member 20 may be an aluminum alloy plate, and the second connecting member 30 may be a single-layer steel plate, a multi-layer steel plate or a pipe beam. Fig.13 When the special-shaped steel pipe beam is shown, the pipe beam has a certain rigidity and structural strength, which can ensure the reliability and stability of the second connecting member 30, and ensure that the second connecting member 30 can withstand the pressure of hot riveting without deformation. In addition, because the pipe beam is a special-shaped pipe beam, it is necessary to integrate a clamp pad 101 on the clamp, so that the clamp pad 101 is located between the second electrode assembly 52 and the special-shaped pipe beam, and the clamp pad 101 matches the shape of the special-shaped pipe beam, which can prevent the pipe beam from moving and ensure the fit of the first connecting member 20 and the second connecting member 30. In addition, the clamp pad 101 is made of a material with good conductivity, so that during the process of energizing the electrode rod 512 and the second electrode assembly 52, the current of the second electrode assembly 52 can be transmitted to the second connecting member 30 through the clamp pad 101, and then transmitted to the first connecting member 20 and the rivet 10, forming resistance heat, and realizing hot riveting and resistance spot welding.

[0086] Reference below Figures 1 to 10 A control method of a heat riveting connection device 100 according to a specific embodiment of the present invention is described. It can be understood that the following description is only exemplary and is intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0087] like Figures 1 to 10 As shown, the control method of the hot riveting welding connection device 100 includes:

[0088] Obtaining the position of the first connecting member 20;

[0089] Control the movement of the hot riveting welding gun body 40 so that the first connecting member 20 and the second connecting member 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 prefabricated hole 201;

[0090] Control the guide rail tube 511 to move toward the direction close to the second electrode assembly 52, so that the guide rail tube 511 and the second electrode assembly 52 clamp the first connecting member 20 and the second connecting member 30;

[0091] Controlling the nail feeding tube 61 to feed the rivet 10 into the guide rail tube 511;

[0092] Controlling the electrode rod 512 to move toward the second electrode assembly 52 at a first speed until the electrode rod 512 abuts against an end of the rivet 10 that is away from the second electrode assembly 52 ;

[0093] The electrode rod 512 is controlled to apply a pressure P1 to the rivet 10, and a current I1 is passed through the electrode rod 512 and the second electrode assembly 52 until the end of the rivet leg 2 facing away from the rivet shoulder 1 abuts against the second connecting member 30;

[0094] The electrode rod 512 is controlled to apply a pressure P2 to the rivet 10, and a current I2 is passed through the electrode rod 512 and the second electrode assembly 52 until the rivet shoulder 1 abuts against a surface of the first connecting member 20 that faces away from the second connecting member 30, wherein P2>P1, I2>I1;

[0095] Control the electrode rod 512 to apply a pressure P3 to the rivet 10, and pass a current I3 through the electrode rod 512 and the second electrode assembly 52 until the depth of the weld nugget formed by the rivet 10 and the second connecting member 30 reaches a preset depth, wherein P3≥P2, I3≥I2;

[0096] Stop supplying current to the electrode rod 512 and the second electrode assembly 52 , and maintain the pressure applied by the electrode rod 512 to the rivet 10 .

[0097] Other structures and operations of the control method of the heat riveting connection device 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0099] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A control method for a hot riveting welding device, the hot riveting welding device is used to connect a first connecting member and a second connecting member, the first connecting member is provided with a prefabricated hole, the hot riveting welding device comprises a hot riveting welding gun body and an electrode assembly, the electrode assembly is arranged on the hot riveting welding gun body and comprises 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, characterized in that: The control method comprises: Controlling the movement of the hot riveting welding gun body so that the first connecting member and the second connecting member are stacked between the first electrode assembly and the second electrode assembly along a first direction, and the first electrode assembly is arranged opposite to the prefabricated hole; Controlling the first electrode assembly and the second electrode assembly to clamp the first connecting member and the second connecting member; placing a rivet in the first electrode assembly; The first electrode assembly is controlled to drive the rivet to move toward the second electrode assembly, and current is supplied to the first electrode assembly and the second electrode assembly to achieve connection between the rivet and the second connecting member.

2. According to the control method of the hot riveting welding connection device of claim 1, the first electrode assembly comprises a guide rail tube and an electrode rod, the guide rail tube is movably arranged on the hot riveting welding gun body along a first direction, and the electrode rod is movably arranged in the guide rail tube along the first direction, characterized in that: The controlling the first electrode assembly and the second electrode assembly to clamp the first connecting member and the second connecting member comprises: The guide rail tube is controlled to move toward a direction close to the second electrode assembly, so that the guide rail tube and the second electrode assembly clamp the first connecting member and the second connecting member.

3. The control method of the hot riveting connection equipment according to claim 2, characterized in that: The controlling the first electrode assembly to drive the rivet to move toward the second electrode assembly, passing current through the first electrode assembly and the second electrode assembly, and realizing the connection between the rivet and the second connecting member comprises: Controlling the electrode rod to move toward the second electrode assembly at a first speed until the electrode rod abuts against an end of the rivet that is away from the second electrode assembly; The electrode rod is controlled to move toward the second electrode assembly at a second speed, where the second speed is less than the first speed, and current is supplied to the electrode rod and the second electrode assembly to achieve connection between the rivet and the second connecting member.

4. According to the control method of the hot riveting connection device of claim 3, the rivet comprises a rivet shoulder and a rivet leg, the rivet shoulder is located on the side of the first connecting member away from the second connecting member, the rivet leg is connected to the side of the rivet shoulder facing the second connecting member, and the rivet leg is inserted into the prefabricated hole, characterized in that: The controlling the electrode rod to move toward the second electrode assembly at a second speed, the second speed being less than the first speed, and supplying current to the electrode rod and the second electrode assembly to achieve connection between the rivet and the second connecting member comprises: Controlling the electrode rod to apply pressure P1 to the rivet, and passing current I1 through the electrode rod and the second electrode assembly until the end of the rivet leg facing away from the rivet shoulder abuts against the second connecting member; Controlling the electrode rod to apply pressure P2 to the rivet, and passing current I2 through the electrode rod and the second electrode assembly until the rivet shoulder abuts against a surface of the first connecting member facing away from the second connecting member, wherein P2>P1, I2>I1; Controlling the electrode rod to apply a pressure P3 to the rivet, and passing a current I3 through the electrode rod and the second electrode assembly until the depth of the weld nugget formed by the rivet and the second connecting member reaches a preset depth, wherein P3≥P2, I3≥I2; Stop supplying current to the electrode rod and the second electrode assembly, and maintain the pressure applied by the electrode rod to the rivet.

5. The control method of the hot riveting welding device according to claim 1, wherein the hot riveting welding device further comprises a positioning system, wherein the positioning system is electrically connected to the hot riveting welding gun body, and wherein: Before controlling the movement of the hot riveting welding gun body so that the first connecting member and the second connecting member are stacked between the first electrode assembly and the second electrode assembly along a first direction and the first electrode assembly is arranged relative to the prefabricated hole, the control method further includes: The position of the first connecting member is obtained.

6. The control method of the heat riveting connection device according to claim 1, wherein the heat riveting connection device further comprises a nail feeding system, wherein the nail feeding system comprises a nail feeding tube, wherein the nail feeding tube is connected to the first electrode assembly, wherein: Placing a rivet in the first electrode assembly comprises: The rivet feeding tube is controlled to feed the rivet into the first electrode assembly.

7. The control method of the hot riveting connection equipment according to any one of claims 1 to 6, characterized in that: The rivet is a steel piece, the first connecting piece is an aluminum piece, and the second connecting piece is a steel piece.

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