Hot rivet welding joint

Abstract

The utility model discloses a hot rivet welding joint. The hot rivet welding joint comprises a fixing rod, a welding joint body and a heating pipe. The end face, away from the fixing rod, of the welding head is provided with a shaping groove. The heating pipe is installed on the welding head and located near the shaping groove. The corresponding positions of the heating pipes and the shaping grooves are arranged at equal intervals in the installation direction of the heating pipes. The welding device has the beneficial effects that the heating pipe is installed at the position, close to the shaping groove, of the welding head, the size of the welding head can be effectively reduced, rapid heating of the shaping groove can be achieved, then energy consumption can be effectively reduced, and meanwhile the cooling speed after hot melting of the riveting column can be increased. Moreover, the heating pipes are arranged at equal intervals along the mounting direction and at the corresponding positions of the shaping grooves, so that the shaping grooves can be uniformly heated by the heating pipes, and the hot melting efficiency of the riveting columns is further improved to reduce the energy consumption.

Description

Technical Field

[0001] The present application relates to the technical field of hot riveting welding, and in particular to a hot riveting welding joint. Background Art

[0002] Hot riveting welding is to use the inherent plastic rivet columns, rib wings, and vertical ribs reserved on the molded parts to correspond to the prefabricated holes through stamping or injection molding. The protruding rivet columns (hot piles) on the surface are compressed and cooled with the forming joint (rivet head) after controlled hot melting and softening to achieve clamping. It can mechanically rivet and assemble materials of different materials together. Using a rivet head of a specific shape, plastic rivet columns can be riveted with countersunk heads (flush riveting), hemispherical riveting, arc flanging riveting, vertical rib rib riveting, and hem inlay and covering.

[0003] The utility model with publication number CN209426186U discloses a hot riveting welding head, including a welding head fixing rod, a heating coil and a welding head body; the welding head body is connected to the welding head fixing rod through a first end, and the second end of the welding head body is protruding and used for hot riveting welding; the heating coil is wound around the middle of the welding head body for heating the welding head body. It can be seen from the disclosed prior art solutions that the area used for heating in the welding head body is large in volume, which is not conducive to the cooling of the rivet column (hot pile) after hot melting and softening; and the heating area is far away from the hot area, and preheating is required before hot riveting, which will reduce the efficiency of hot riveting. Based on the above defects, it is now urgent to improve the existing technology. Utility Model Content

[0004] One of the purposes of the present application is to provide a heat riveting joint that can solve at least one defect in the above-mentioned background technology.

[0005] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a hot riveting welding joint, comprising a fixing rod, a welding head and a heating tube; the welding head is arranged at one end of the fixing rod, and a welding cavity is arranged on the end surface of the welding head away from the fixing rod; the heating tube is installed on the welding head and is located near the welding cavity.

[0006] Preferably, the spacing distance between the heating tube and the welding cavity is less than or equal to the depth of the welding cavity.

[0007] Preferably, the heating tube is installed in a single strand on the welding head; along the installation direction of the heating tube, the corresponding positions of the heating tube and the welding cavity are arranged at equal intervals.

[0008] Preferably, the welding head is provided with a penetrating installation groove, and the installation groove extends along the welding cavity in a direction perpendicular to the cross-sectional contour of the end face of the welding head; the heating tube is installed in the installation groove through the outside of the welding head.

[0009] Preferably, an installation groove for installing the heating tube is provided on the outer side of the welding head, and the installation groove extends along the welding cavity in parallel to the cross-sectional contour direction of the end face of the welding head.

[0010] Preferably, the heating tube includes a heating section and a wire section electrically connected to both ends of the heating section; the heating tube is installed in the mounting groove through the heating section, and the wire section is installed in the through hole in the center of the fixing rod and extends out to connect the end of the heating section.

[0011] Preferably, the welding head is provided with a penetrating heat dissipation hole on a side of the mounting slot away from the welding cavity; the distance between the heat dissipation hole and the mounting slot is less than or equal to the distance between the heating tube and the welding cavity.

[0012] Preferably, the welding head adopts a rectangular cross-sectional structure or a circular cross-sectional structure; the welding head is detachably connected to the fixing rod by means of tight plugging and / or fastener connection.

[0013] Preferably, an air blowing pipe is installed in the through hole in the center of the fixing rod, and the air blowing pipe is suitable for blowing a cooling air flow to the welding head.

[0014] Preferably, a threaded section is provided on a side of the fixing rod away from the welding head, and at least one pair of fixing nuts are installed at intervals on the threaded section; the fixing rod is fixedly installed through an installation area with adjustable spacing formed between the fixing nuts.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] By installing the heating tube at a position close to the welding cavity of the welding head, the volume of the welding head can be effectively reduced, and the welding cavity can be quickly heated, thereby effectively reducing energy consumption, and at the same time, the cooling speed of the rivet stud after thermal melting can be accelerated. In addition, the heating tubes are arranged at equal intervals along the installation direction and at corresponding positions of the welding cavity, which can ensure that the heating tubes heat the welding cavity evenly, so as to further improve the thermal melting efficiency of the rivet stud and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of one embodiment of the utility model.

[0018] Figure 2 For this utility model Figure 1 A local enlarged schematic diagram of point A in the middle.

[0019] Figure 3 For this utility model Figure 1 A schematic diagram of a partially exploded state of the illustrated embodiment.

[0020] Figure 4 For this utility model Figure 1 A schematic diagram of the partial cross-sectional structure of the fixing rod in the illustrated embodiment.

[0021] Figure 5 For this utility model Figure 1 A schematic cross-sectional structural diagram of a welding head in the illustrated embodiment.

[0022] Figure 6 For this utility model Figure 1 A schematic diagram of the partial cross-sectional structure of the cooperation between the heating tube and the welding head in the illustrated embodiment.

[0023] Figure 7 It is a schematic diagram of the installation structure of the fixing rod in the utility model.

[0024] Figure 8 For this utility model Figure 1 A schematic diagram of a partial cross-sectional structure of a modified example of the illustrated embodiment.

[0025] Fig. 9 It is a schematic diagram of the overall structure of another embodiment of the utility model.

[0026] Fig.10 For this utility model Fig. 9 A local enlarged schematic diagram of point B in the middle.

[0027] Fig.11 For this utility model Fig. 9 A schematic diagram of a partially exploded state of the illustrated embodiment.

[0028] Fig.12 For this utility model Fig. 9 A schematic diagram of the partial cross-sectional structure of the cooperation between the heating tube and the welding head in the illustrated embodiment.

[0029] In the figure: a fixing rod 1, a threaded section 11, a through hole 100, an open groove 101, a first plug block 12, a screw hole 120, a welding head 2, a welding cavity 200, a mounting groove 211, a transition groove 212, a slot 220, a first heat dissipation hole 230, a second heat dissipation hole 240, a second plug block 25, a heating tube 3, a heating section 31, a transition section 32, a wire section 33, an air blowing tube 4, a fixing nut 51, a screw 52, ​​and a fixing plate 600. DETAILED DESCRIPTION

[0030] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0033] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0034] One of the preferred embodiments of the present application is as follows: Figure 1 , Figure 2 , Fig. 9 and Fig.10 As shown, a hot riveting welding joint 2 comprises a fixing rod 1, a welding head 2 and a heating tube 3. The fixing plate 1 is used to fix and install the entire hot riveting welding joint, the welding head 2 is arranged at one end of the fixing rod 1, and the end surface of the welding head 2 away from the fixing rod 1 is provided with a welding cavity 200 whose shape is adapted to the needs of hot riveting welding. The heating tube 3 is installed on the welding head 2 and is located near the welding cavity 200, so that the welding cavity 200 can be quickly heated by the heating tube 3 to heat-melt and shape the rivet column.

[0035] It should be known that in a hot riveting welding head disclosed in the utility model with publication number CN209426186U, the heating tube 3 is wound and installed on the side of the welding head 2 away from the welding cavity 200; and in order to speed up the heat melting speed of the rivet stud, the heating tube 3 needs to be wound around the welding head 2 in multiple strands, which results in the welding head 2 needing to be set longer, that is, the volume of the welding head 2 is larger. Therefore, the heating energy consumption of the heating tube for the welding head 2 is also larger during heating; and the larger volume of the welding head 2 makes more energy accumulated inside, which results in the cooling efficiency of the welding head 2 after the heat melting of the rivet stud is reduced.

[0036] In this embodiment, the heating tube 3 can be directly installed on the welding head 2 near the welding cavity 200, so that when the heating tube 3 is heated, the heat can be quickly transferred to the welding cavity 200, and the rapid thermal melting of the rivet column can be achieved; compared with the traditional method, the volume of the welding head 2 and the energy consumption required for heating can be effectively reduced. Due to the reduction in the volume of the welding head 2, the welding head 2 accumulates less energy, and can quickly dissipate heat to accelerate the cooling and shaping speed of the rivet column after thermal melting. At the same time, the heating tube 3 is arranged at equal intervals along the installation direction and the corresponding position of the welding cavity 200, which can ensure that the heating tube 3 heats the welding cavity 200 evenly, so as to further improve the thermal melting efficiency of the rivet column and reduce energy consumption.

[0037] In this embodiment, in order to ensure the heat transfer speed of the heating tube 3 to the welding cavity 200, the spacing distance between the heating tube 3 and the welding cavity 200 should not be too large, that is, the heating tube 3 will no longer be located near the welding cavity 200. The specific value of the spacing distance between the heating tube 3 and the welding cavity 200 can be selected according to actual needs; for example, the spacing distance between the heating tube 3 and the welding cavity 200 can be set to be less than or equal to the depth of the welding cavity 20. Of course, the spacing distance between the heating tube 3 and the welding cavity 200 cannot be too small, otherwise the inner wall of the welding cavity 200 will become very weak and prone to deformation or rupture; therefore, it is preferred that the spacing distance X between the heating tube 3 and the welding cavity 200 is between (0.3~2)h, where h represents the depth of the welding cavity 200. Since the spacing distance between the heating tube 3 and the welding cavity 200 is close, the heat transfer efficiency of the heating tube 3 is high, so the heating tube 3 can be installed in a single strand.

[0038] It should be known that along the installation direction of the heating tube 3, the spacing between each position point on the heating tube 3 and the corresponding position of the welding cavity 200 may be unequal, as long as it is within the value range of the above-set spacing distance X. Of course, in order to further ensure the heating efficiency of the heating tube 3 to the welding cavity 200, the spacing between each position point on the heating tube 3 and the corresponding position of the welding cavity 200 is preferably set equally; that is, the installation position of the single-strand heating tube 3 is uniformly corresponding to the contour position of the welding cavity 200, so that the heat of the heating tube 3 can be evenly transferred to the welding cavity 200. Of course, the heating tube 3 can also be selected to be arranged in multiple strands. In order to reduce the heating energy consumption of the heating tube 3 to the welding joint 2 as much as possible, the spacing distances between the multiple strands of the heating tube 3 and the welding cavity 200 are basically the same.

[0039] Specifically, Figure 5 , Figure 6 , Fig.11 and Fig.12As shown, the welding head 2 is provided with a mounting groove 211 for mounting the heating tube 3. In order to ensure that the heating tube 3 can heat the welding cavity 200 evenly, the mounting groove 211 and the inner wall of the welding cavity 200 are arranged at equal intervals along the extension direction of the mounting groove 211; so that after the heating tube 3 is installed in the mounting groove 211, the heat generated by the heating tube 3 can be evenly transferred along the thickness direction at various positions of the inner wall contour of the welding cavity 200.

[0040] It should be known that there are many specific shapes of the welding cavity 200, and technicians in this field can set it according to actual use requirements; for example, when the rivet column is a flat structure, the welding cavity 200 can be in the shape of a "one"; for another example, when the rivet column is a columnar structure, the welding cavity 200 can be in the shape of a round cap. For the "one"-shaped welding cavity 200, the welding head 2 used for processing can be a columnar structure with a circular cross-section, or a block structure with a rectangular cross-section; in order to further reduce the volume of the welding head 2, for the "one"-shaped welding cavity 200, it is preferred to use a block welding head 2 with a rectangular cross-section. For a circular welding cavity 200, the welding head 2 used for processing generally adopts a cylindrical structure. For the convenience of understanding, the following will take the "one"-shaped welding cavity 200 and the round cap-shaped welding cavity 200 as examples for detailed description.

[0041] Embodiment 1:

[0042] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the welding head 2 is a flat block structure, and the welding cavity 200 for hot melting and shaping the rivet column is in the shape of a letter "I". The mounting groove 211 extends along the cross-sectional contour direction of the welding cavity 200, so that when the heating tube 3 is installed in the mounting groove 211, the spacing between the heating tube 3 and the welding cavity 200 along the cross-sectional contour direction of the welding cavity 200 is consistent.

[0043] It should be known that the profile cross section of the welding cavity 200 in the above example includes a cross section profile perpendicular to the end face of the welding head 2 and a cross section profile parallel to the end face of the welding head 2. The cross section profile perpendicular to the end face of the welding head 2 can be divided into a cross section profile parallel to the length direction of the welding cavity 200 and a cross section profile parallel to the width direction of the welding cavity 200. For ease of understanding, the following will describe in detail the setting of the mounting groove 211 with specific examples for different formation positions of the profile cross section.

[0044] Example 1: The mounting groove 211 extends along a cross-sectional profile parallel to the length direction of the welding cavity 200 .

[0045] like Figure 5As shown in FIG. 1 , the cross-sectional contour line of the welding cavity 200 includes a straight section and arc sections at both ends of the straight section; then the mounting groove 211 may include the corresponding straight section and arc section. However, considering that the length of the straight section of the longitudinal contour of the welding cavity 200 is much longer than that of the arc section, and the rivet studs are mainly concentrated in the straight section before being melted, in order to reduce the processing difficulty of the mounting groove 211, as shown in FIG. Figure 5 and Figure 6 As shown, the mounting groove 211 can be directly set as a straight structure.

[0046] The specific number of the mounting grooves 211 arranged along the length direction may be one or more. Figure 5 and Figure 5 As shown, one installation groove 211 can be set at the center of the welding cavity 200 along the width direction and parallel to the extension direction of the welding cavity 200; the number of heating tubes 3 installed in the installation groove 211 can be one. If the width of the welding cavity 200 is wide, multiple heating tubes 3 can be set along the width direction. If these multiple heating tubes 3 are installed through separate installation grooves 211, multiple installation grooves 211 can be formed along the width direction.

[0047] Example 2: The mounting groove 211 extends along a cross-sectional profile parallel to the width direction of the welding cavity 200 .

[0048] The cross-sectional profile of the welding cavity 200 parallel to the width direction is mainly an arc-shaped structure, so the installation groove 211 also needs to be an arc-shaped structure, and in order to ensure uniform heating, it is necessary to set a plurality of installation grooves 211 at equal intervals in the length direction of the welding cavity 200; correspondingly, the heating tube 3 needs to be provided with a plurality of strands corresponding to the number of the installation grooves 211.

[0049] Example 3: The mounting groove 211 extends along a cross-sectional contour parallel to the end surface of the welding head 2 , that is, the mounting groove 211 can extend along the end surface contour line of the welding cavity 200 .

[0050] like Figure 2 As shown, the end face contour line of the welding cavity 200 includes two symmetrical straight sections and two symmetrical arc sections, and the two ends of the two straight sections are connected by two arc sections respectively. Then there can be one mounting groove 211, and the mounting groove 211 also includes two straight sections and two arc sections corresponding to the end face contour line of the welding cavity 200. Since the arc section length of the welding cavity 200 is much shorter than the straight section length, there can also be two mounting grooves 211, and the two mounting grooves 211 are straight structures and correspond to the two straight sections of the end face contour line of the welding cavity 200.

[0051] It should be noted that the above three examples all meet the requirements of this embodiment, but considering the difficulty of processing the mounting groove 211, in this embodiment, the specific setting method of the mounting groove 211 preferably adopts the above example 1 and example 3. In order to simplify the description of the subsequent content, the subsequent content will be described by taking the mounting groove 211 according to the above example 1 as an example.

[0052] In this embodiment, Figure 5 and Figure 6 As shown, the installation groove 211 is provided through the welding head 2, so that the heating tube 3 can be installed in the installation groove 211 from the outside of the welding head 2. By providing the installation groove 211 through, the cooling and heat dissipation of the heating tube 3 can be facilitated, so as to accelerate the cooling and shaping of the rivet column melted in the welding cavity 200.

[0053] It should be known that the installation groove 211 can also be safely set inside the welding head 2, then the welding head 2 will wrap the heating tube 3, which is not conducive to the heat dissipation of the heating tube 3; therefore, in this embodiment, it is preferred to set the installation groove 211 through.

[0054] Specifically, Figures 3 to 6 As shown, the heating tube 3 includes a heating section 31 and a wire section 33 electrically connected to both ends of the heating section 31; the heating section 31 has a heating wire built in. A through hole 100 is provided at the center of the fixing rod 1, and a radially penetrating open groove 101 is provided on the side wall of the fixing rod 1 near the welding head 2. The heating tube 3 is installed in the installation groove 211 through the heating section 31, and the wire section 33 is installed in the through hole 100 at the center of the fixing rod 1 and extends to the outside of the fixing rod 1 along the open groove 101, and then connected to the end of the heating section 31 on the outside of the welding head 2. By setting the wire section 33 of the heating tube 3 in the through hole 100 of the fixing rod 1, the wire section 33 can be protected to increase the service life of the wire section 33, and the setting of a specific wire protection device can be omitted.

[0055] It should be known that since the mounting groove 211 runs straight through the welding head 2, the two ends of the heating section 31 are respectively located on opposite sides of the welding head 2. Therefore, the side portion of one end of the fixing rod 1 close to the welding head 2 needs to be symmetrically provided with two open grooves 101, so that the two wire segments 33 respectively connected to the two ends of the heating section 31 extend along the corresponding open grooves 101 to connect the corresponding ends of the heating section 31.

[0056] In this embodiment, Figure 3 , Figure 5 and Figure 6As shown, the sides of the welding head 2 corresponding to both ends of the installation groove 211 are provided with transition grooves 212 corresponding to the position of the opening groove 101, and the transition grooves 212 are parallel to the axial direction of the fixing rod 1 and are respectively connected to the ends of the installation groove 211 on the corresponding sides. Therefore, the wire end 33 of the heating tube 3 can pass through the opening groove 101 through the correspondingly arranged transition section 32 and extend along the transition groove 212 to the position of the installation groove 211 to achieve connection with the end of the heating section 31.

[0057] It is understandable that if the transition groove 212 is not provided on the side of the welding head 2, then when the transition section 32 of the wire segment 33 is connected to the heating section 31, the transition section 32 will be located outside the welding head 2; that is, along the axial direction of the fixing rod 1, the transition section 32 will protrude from the welding head 2. Therefore, during the use of the hot riveting welding head of the present application, the transition section 32 may be touched by an object, which may easily cause damage to the transition section 32 and affect the normal use of the heating tube 3. Therefore, in the present embodiment, a transition groove 212 is provided on the outer side of the welding head 2, and the depth of the transition groove 212 is greater than or equal to the cross-sectional width of the transition section 32, so that when the transition section 32 is located in the transition groove 212, the possibility of being touched can be reduced or avoided, so as to ensure the service life of the heating tube 3.

[0058] In this embodiment, Figure 5 and Figure 6 As shown, the welding head 2 is provided with a penetrating heat dissipation hole on the side of the mounting groove 211 away from the welding cavity 200; the distance between the heat dissipation hole and the mounting groove 211 is less than or equal to the distance between the heating tube 3 and the welding cavity 200. By providing the heat dissipation hole, the heating section 31 can be quickly cooled after heating the welding cavity 200.

[0059] It can be understood that the purpose of setting the heat dissipation hole is to reduce the wall thickness of the side of the mounting groove 211 away from the welding cavity 200, thereby improving the heat dissipation effect of the heating section 31. The wall thickness of the side of the mounting groove 211 away from the welding cavity 200 is the distance between the heat dissipation hole and the mounting groove 211, and the specific value of the distance can be set according to actual needs. Of course, if the distance between the heat dissipation hole and the mounting groove 211 is set too large, it will not have a good heat dissipation effect. Therefore, in this embodiment, the distance between the heat dissipation hole and the mounting groove 211 can be set to be less than or equal to the distance X between the heating section 31 of the heating tube 3 and the welding cavity 200. At the same time, if the distance between the heat dissipation hole and the mounting groove 211 is too small, it is easy to break, and then it cannot play the role of positioning the heating section 31, which may cause the heating section 31 to bend in the direction away from the welding cavity 200. Therefore, in this embodiment, the distance Y between the heat dissipation hole and the mounting groove 211 can be set to (0.5~1)X.

[0060] It should be understood that the heat dissipation hole can be one, for example Figure 5As shown, the cross section of the heat dissipation hole is rectangular and penetrates the two sides with larger areas of the welding head 2. There can also be multiple heat dissipation holes, and the multiple heat dissipation holes are evenly distributed and penetrate the welding head 2. The multiple heat dissipation holes can be arranged in the same direction, that is, the multiple heat dissipation holes are arranged to penetrate one pair of opposite sides of the welding head 2. The multiple heat dissipation holes can also be arranged perpendicular to each other, that is, there is at least one pair of heat dissipation holes arranged perpendicular to each other, which are respectively arranged to penetrate two pairs of oppositely arranged side walls of the welding head 2.

[0061] In this embodiment, the connection between the welding head 2 and the fixing rod 1 can be an integral molding or a split detachable connection. Generally speaking, since the welding head 2 needs to be heated and hot-riveted, a metal material with high temperature resistance and wear resistance is used; and the fixing rod 1 is only used to connect the welding head 2 and fix the entire hot-riveted welding head, so the performance requirements for the material are not high. Therefore, in this embodiment, the connection between the welding head 2 and the fixing rod 1 preferably adopts a split detachable method. There are many detachable connection methods between the welding head 2 and the fixing rod 1, such as tight plugging, tight connection, and tight plugging and tight connection at the same time. For the sake of ease of understanding, the following will take the simultaneous use of tight plugging and tight connection as an example for detailed description.

[0062] Specifically, Figure 3 , Figure 4 and Figure 6 As shown. Slots 220 are provided on opposite sides of the welding head 2, and a symmetrical first plug block 12 is provided at the end of the fixing rod 1; the welding head 2 is correspondingly plugged into the first plug block 12 on the fixing rod 1 through the slots 220. Then, a fastener, such as a screw 52, ​​is passed through the screw hole 120 of the first plug block 12 and the welding head 2 for screw tightening.

[0063] It is understandable that the positions of the slot 220 and the first plug block 12 can be swapped, that is, the slot 220 is set on the fixing rod 1, and the first plug block 12 is set on the welding head 2. For the screw tightening of the screw 52, ​​the first plug block 12 and the welding head 2 can be both provided with screw holes 120, so that the screw 52 can be threadedly matched with the screw holes 120 on the first plug block 12 and the welding head 2 at the same time; or only the first plug block 12 is provided with a screw hole 120, and the screw 52 can pass through the heat dissipation hole on the welding head 2 and be threadedly matched with the screw holes 120 on the two first plug blocks 12, at which time the screw 52 abuts against one side of the heat dissipation hole to limit the welding head 2 in the direction away from the fixing rod 1.

[0064] In this embodiment, if the length of the welding head 2 along the axial direction of the fixing rod 1 is short, for example Figure 3 , Figure 5 and Figure 6As shown; at this time, due to the insertion of the first plug 12 and the slot 220, the first plug 12 will block the heat dissipation holes set on the welding head 2, thereby affecting the heat dissipation of the heating section 31. In order to ensure the heat dissipation effect of the heat dissipation holes, the length of the welding head 2 can be increased, for example Figure 8 As shown, the extension length of the heat dissipation hole along the axial direction of the fixing rod 1 can be increased accordingly to ensure that the heat dissipation hole has sufficient heat dissipation circulation space. In order to ensure the structural strength of the welding head 2, the heat dissipation hole can be divided into two first heat dissipation holes 230 and second heat dissipation holes 240 arranged at intervals. The first heat dissipation hole 230 at this time is only used to facilitate the passage of the screw 52 to limit the welding head 2, and the second heat dissipation hole 240 is close to the installation groove 211 to dissipate heat for the heating section 31 of the heating tube 3.

[0065] In this embodiment, Figure 1 and Figure 7 As shown, a blowing pipe 4 is installed in the through hole 100 at the center of the fixing rod 1, and the blowing pipe 4 can blow cooling air to the welding head 2, thereby accelerating the cooling and shaping speed of the rivet column after the heating section 31 is hot-melted. It should be known that the air source of the blowing pipe 4 is provided by a cooling air pump, and the specific structure of the air pump and the connection structure of the air pump and the air outlet pipe 4 are well-known technologies for those skilled in the art, so they will not be elaborated in detail here.

[0066] It should be known that the hot riveting welding joint of the present application is mainly used for hot riveting welding machines. The specific structure and working principle of hot riveting welding machines are well known to those skilled in the art, so they will not be elaborated in detail here. Specifically, Figure 7 As shown, the heat riveting welding joint of the present application is installed on the fixing plate 600 of the heat riveting welding machine through the fixing rod 1.

[0067] In this embodiment, there are many specific structures for fixing the fixing rod 1 and the fixing plate 600. For the sake of easy understanding, a specific structure is given below. Figure 1 and Figure 7 As shown, a threaded section 11 is provided on one side of the fixing rod 1 away from the welding head 2 , and at least one pair of fixing nuts 51 are installed at intervals on the threaded section 11 ; the fixing rod 1 is fixedly installed through an installation area with adjustable spacing formed between the fixing nuts 51 .

[0068] For ease of understanding, the specific installation process of the fixing rod 1 will be described in detail below by taking the example of two fixing nuts 51 forming the installation area. Before installing the fixing rod 1, a fixing nut 51 can be screwed on the threaded section 11 of the fixing rod 1 to a set position, and then the threaded section 11 of the fixing rod 1 is passed through the through hole on the fixing plate 600 of the hot riveting welding machine. At this time, the fixing nut 51 on the fixing rod 1 is located on one side of the fixing plate 600, and then another fixing nut 51 is screwed on the threaded section 11 of the fixing rod 1 on the other side of the fixing plate 600; finally, the positions of the two fixing nuts 51 are adjusted so that the hot riveting welding joint is in the set installation position, and at this time, the two fixing nuts 51 are respectively tightened on both sides of the fixing plate 600.

[0069] Embodiment 2:

[0070] Compared with the first embodiment, the difference of this embodiment is that Figures 10 to 12 As shown, the welding head 2 is a cylindrical structure, and the mounting groove 211 extends along the welding cavity 200 parallel to the cross-sectional contour direction of the end face of the welding head 2. In other words, the mounting groove 211 extends along the contour direction of the welding cavity 200 at the end face of the welding head 2.

[0071] It can be understood that for a cylindrical welding head 2, the welding cavity 200 provided on its end face is generally round cap-shaped, that is, the cross-sectional profile of the welding cavity 200 parallel to the end face of the welding head 2 is circular. In order to ensure that the heating tube 3 heats the welding cavity 200 uniformly, the mounting groove 211 can be extended along the circumferential direction of the welding head 2, that is, the mounting groove 211 is extended along the cross-sectional profile direction of the welding cavity 200 parallel to the end face of the welding head 2. Of course, for a welding cavity 200 with a non-circular cross-sectional profile, the mounting groove 211 only needs to extend the welding cavity 200 parallel to the cross-sectional profile of the end face of the welding head 2, and the heating tube 3 installed in the mounting groove 211 can still ensure that the welding cavity 200 is heated uniformly.

[0072] It should be noted that the overall extension direction of the mounting groove 211 corresponds to the cross-sectional profile of the welding cavity 200, which does not mean that the profile size of the mounting groove 211 is equal to the profile size of the end face of the welding cavity 200, that is, the two are only corresponding in shape, not necessarily in size. Taking the end face profile of the welding cavity 200 as an example, the profile size of the mounting groove 211 can be equal to the profile size of the end face of the welding cavity 200, or it can be smaller than the profile size of the end face of the welding cavity 200.

[0073] In this embodiment, Figures 10 to 12 As shown, the mounting groove 211 is arranged on the outside of the welding head 2, so that when the heating section 31 of the heating tube 3 is installed in the mounting groove 211, the heating section 31 can directly correspond to the external environment, thereby accelerating the cooling speed of the heating section 31 after heating is completed.

[0074] It should be known that the mounting groove 211 can be arranged inside the welding head 2 along the end surface contour line direction of the welding cavity 200, but the covering of the heating section 31 by the welding head 2 will result in poor heat dissipation effect of the heating section 31. Therefore, in this embodiment, the heat dissipation speed of the heating section 31 can be accelerated by connecting the mounting groove 211 with the outside.

[0075] In this embodiment, based on the structure of the mounting groove 211, the heating section 31 is generally a single strand; in order to ensure that the heating section 31 heats the welding cavity 200 evenly, the heating section 31 can extend around the welding head 2 through the mounting groove 211; that is, the two ends of the heating section 31 are close to each other. Figures 10 to 12 As shown, an axially extending transition groove 212 is provided on the side of the welding head 2, and an open groove 101 is provided on the end side wall of the fixing rod 1 close to the welding head 2, and the position of the open groove 101 corresponds to the position of the transition groove 212, so that the wire segment 33 of the heating tube 3 installed in the central through hole 100 of the fixing rod 1 can pass through the transition segment 32 along the open groove 101 and the transition groove 212 to be correspondingly connected with the two ends of the heating segment 31.

[0076] In this embodiment, Fig.11 and Fig.12 As shown, the welding head 2 can be detachably connected by tightly plugging the second plug block 25 disposed at one end away from the welding cavity 200 with the through hole 100 in the center of the fixing rod 1. That is, an interference fit or transition fit is performed between the second plug block 25 and the through hole 100. Of course, in order to ensure a more stable connection between the welding head 2 and the fixing rod 1, a fastener can also be passed through the fixing rod 1 from the outside of the fixing rod 1 to thread and tightly connect with the second plug block 25.

[0077] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A hot riveting welding joint, comprising a fixing rod, a welding head and a heating tube, wherein the welding head is arranged at one end of the fixing rod, and a welding cavity is arranged on the end surface of the welding head away from the fixing rod; characterized in that: The heating tube is installed on the welding head and is located near the welding cavity.

2. The heat riveting joint according to claim 1, characterized in that: The spacing distance between the heating tube and the welding cavity is less than or equal to twice the depth of the welding cavity.

3. The heat riveting joint according to claim 2, characterized in that: Along the installation direction of the heating tube, the heating tube and the corresponding positions of the welding cavity are arranged at equal intervals.

4. The heat riveting joint according to claim 3, characterized in that: The welding head is provided with a through installation groove, and the installation groove extends along the welding cavity in a direction perpendicular to the cross-sectional contour of the end face of the welding head; the heating tube is installed in the installation groove through the outside of the welding head.

5. The heat riveting joint according to claim 3, characterized in that: An installation groove for installing the heating tube is arranged on the outer side of the welding head, and the installation groove extends along the welding cavity in parallel to the cross-sectional contour direction of the end face of the welding head.

6. The heat riveting joint according to claim 4 or 5, characterized in that: The heating tube includes a heating section and a wire section electrically connected to both ends of the heating section; the heating tube is installed in the installation groove through the heating section, and the wire section is installed in the through hole in the center of the fixing rod and extends out to connect the end of the heating section.

7. The heat riveting joint according to claim 4, characterized in that: The welding head is provided with a penetrating heat dissipation hole on a side of the mounting slot away from the welding cavity; the distance between the heat dissipation hole and the mounting slot is less than or equal to the distance between the heating tube and the welding cavity.

8. The heat riveting joint according to claim 1, characterized in that: The welding head adopts a rectangular cross-section structure or a circular cross-section structure; the welding head is detachably connected to the fixing rod by means of tight plugging and / or fastener connection.

9. The heat riveting joint according to claim 1, characterized in that: An air blowing pipe is installed in the through hole at the center of the fixing rod, and the air blowing pipe is suitable for blowing a cooling air flow to the welding head.

10. The heat riveting joint according to claim 1, characterized in that: A threaded section is arranged on one side of the fixing rod away from the welding head, and at least one pair of fixing nuts are installed at intervals on the threaded section; the fixing rod is fixedly installed through an installation area with adjustable spacing formed between the fixing nuts.

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