An automatic spot welding device for the side tailboard of an automobile

Abstract

The present application relates to an automatic spot welding device for an automobile side tail plate, belonging to the technical field of automatic spot welding. The automatic spot welding device includes a fixed machine base, a station plate, a positioning table and a spot welding manipulator. First positioning holes are provided on opposite sides of the first side plate, and second positioning holes are provided on opposite sides of the second side plate. The positioning table is provided with a positioning mechanism and a pressing mechanism. Along the rotation direction of the station plate on the fixed machine base, a first loading station, a first welding station, a second loading station, a second welding station and a blanking station are sequentially arranged. The fixed machine base is provided with a first loading mechanism for loading the first side plate and the second side plate at the loading station, a second loading mechanism for loading the positioning piece at the second loading station, and a blanking mechanism for blanking the assembled product at the blanking station. The present application has the function of realizing the automatic welding of the automobile side tail plate and improving the welding efficiency.

Description

Technical Field

[0001] This application relates to the technical field of automatic spot welding, and particularly to an automatic spot welding device for an automobile side tail plate. Background Art

[0002] The automobile side tail plate is an important part of the automobile shell. Due to the relatively complex overall structure of the automobile side tail plate, it is usually composed of multiple metal parts welded together. Referring to Figure 1 , a common automobile side tail plate includes a first side plate, a second side plate, and three groups of positioning pieces.

[0003] Currently, there is a lack of automated special equipment for the welding and assembly of automobile side tail plates. Each part needs to be manually loaded and positioned. After positioning, the welding device is operated to perform spot welding on the welding points. The above welding process has problems such as slow loading and unloading, complex positioning operations, and low welding efficiency. Summary of the Invention

[0004] In order to achieve the automatic welding of the automobile side tail plate and improve the welding efficiency, this application provides an automatic spot welding device for an automobile side tail plate.

[0005] The automatic spot welding device for an automobile side tail plate provided by this application adopts the following technical solutions:

[0006] An automatic spot welding device for an automobile side tail plate, used for welding the automobile side tail plate. First positioning holes are provided on opposite sides of the first side plate, and second positioning holes are provided on opposite sides of the second side plate. The device includes a fixed machine base, a working station plate rotatably installed on the fixed machine base, a positioning table circumferentially arranged on the working station plate and used for positioning and placing the side tail plate, and a spot welding manipulator. The positioning table is provided with a first positioning mechanism that is inserted and matched with the first positioning holes and the second positioning holes, and a first pressing mechanism for pressing the first side plate and the second side plate.

[0007] The fixed machine base is sequentially provided with a first loading station, a first welding station, a second loading station, a second welding station, and an unloading station along the rotation direction of the working station plate. The fixed machine base is provided with a first loading mechanism for loading the first side plate and the second side plate at the loading station, a second loading mechanism for loading the positioning pieces at the second loading station, and an unloading mechanism for unloading the assembled product at the unloading station.

[0008] By adopting the above technical solution, when using the above automatic spot welding device, the first side plate and the second side plate are fed to the feeding station of the fixed machine base through the first feeding mechanism; the station plate rotates, and the preliminarily assembled first side plate and second side plate move to the first welding station, and the first side plate and the second side plate are welded and fixed at the first welding station by the spot welding manipulator; the station plate rotates again to move the positioning table to the second feeding station, and three groups of positioning pieces are fed at the second feeding station; then the positioning table rotates, and the positioning pieces are welded and fixed at the second welding station; finally, the welded automobile side tail plate is unloaded through the unloading mechanism; the automatic spot welding device realizes the automatic welding of the automobile side wall panel, the positioning and assembly of the first side plate, the second side plate and the three groups of positioning pieces are relatively convenient, the spot welding manipulator is used for welding operation, greatly reducing manual operation and improving the welding forming efficiency of the product.

[0009] Optionally, the first positioning mechanism includes a plurality of positioning brackets arranged on the positioning table, a first positioning plug column arranged on the positioning bracket and corresponding to the first positioning hole, and a second positioning plug column arranged on the positioning bracket and corresponding to the second positioning hole;

[0010] The first pressing mechanism includes a pressing bracket rotatably arranged on the positioning bracket, a pressing extension rod arranged on the pressing bracket and used for pressing two side plates, and a pressing driving part for driving the pressing bracket to rotate. The first pressing mechanism is arranged at intervals along the extending direction of the automobile side tail plate.

[0011] By adopting the above technical solution, the structural compositions of the first positioning mechanism and the first pressing mechanism are disclosed. After the first side plate is fed to the positioning table through the first feeding mechanism, the first positioning plug column and the first positioning hole of the first side plate are inserted and matched to realize preliminary positioning. The second side plate and the second positioning plug column are inserted and matched. After the first side plate and the second side plate are positioned, the pressing bracket is rotated to make the pressing extension rod press down and fit on the tops of the two side plates, improving the stability when the first side plate and the second side plate receive welding force, and making the automobile side tail plate not easily shake or displace when subjected to external force.

[0012] Optionally, the positioning piece includes a first folded piece, a second folded piece and a third folded piece. The first folded piece is provided with at least two first through holes. The second folded piece and the third folded piece are provided with second through holes. Both the first side plate and the second side plate are provided with third positioning holes corresponding to the second through holes. The positioning table is provided with a second positioning mechanism for fixing the positioning piece. The second positioning mechanism includes a first positioning component inserted into the first through hole from top to bottom and a second positioning component sequentially passing through the third positioning hole and the second through hole from bottom to top.

[0013] By adopting the above technical solution, the positioning piece includes a first folded piece, a second folded piece and a third folded piece. The three groups of positioning pieces can be positioned on the vehicle side tailboard through the second positioning mechanism, ensuring the stability of the positioning piece during welding. Among them, the first positioning component is inserted into the first through hole from top to bottom, and the second positioning component is inserted into the second through hole from bottom to top.

[0014] Optionally, the first positioning component includes a moving bracket slidably mounted on the station plate and a third positioning plug post vertically mounted at the end of the moving bracket;

[0015] The second positioning component includes a fourth positioning plug post vertically mounted on the positioning table and corresponding to the third positioning hole.

[0016] By adopting the above technical solution, the first positioning component is slidably mounted on the positioning table, and the second positioning component is vertically mounted on the positioning table, so that the welding of the first side plate and the second side plate is less affected by the two positioning components.

[0017] Optionally, the operating table is provided with a second pressing mechanism at the second welding station. The second pressing mechanism and the first pressing mechanism are arranged staggeredly. The second pressing mechanism includes a pressing frame body and a second pressing plate rotatably mounted on the pressing frame body. The second pressing plate and the second positioning component are both provided with sensors for sensing the positioning piece.

[0018] By adopting the above technical solution, the setting of the second pressing mechanism can further improve the fixing effect of the three groups of positioning pieces on the two side plates. The sensor can detect the placement of the positioning piece. After detecting the positioning piece, the welding operation is carried out to ensure the welding accuracy.

[0019] Optionally, the first feeding mechanism includes a first conveying frame, a clamping component arranged above the first conveying frame, and a first moving member for driving the clamping component to slide and lift;

[0020] The positioning table includes a first sliding table and a second sliding table. The first sliding table is fixed to the positioning table. The second sliding table is slidably mounted on the positioning table. The first positioning plug post for plugging and matching with the first side plate is located on the first sliding table, and the second positioning plug post for plugging and matching with the second side plate is located on the second sliding table. The top surface height of the second sliding table is higher than that of the first sliding table.

[0021] By adopting the above technical solution, the structural composition of the first feeding mechanism is disclosed. The first side plate and the second side plate are conveyed on two groups of first conveying frames to the side close to the positioning table. The first side plate and the second side plate are respectively positioned and installed on two positioning sliders by the first clamping member and the second clamping member. Then, the two positioning sliders are driven to move towards each other, so that the second side plate is placed on top of the first side plate, realizing the preliminary positioning of the two side plates. The structure of the above first feeding mechanism is simple, with high automation efficiency and improved feeding efficiency.

[0022] Optionally, the positioning table is provided with a guiding structure. The guiding structure includes a driving inclined surface arranged on the first slider and an abutting inclined surface arranged on the second slider. The second slider includes a slider base, a lifting slider, and an elastic member connecting the slider base and the lifting slider. The abutting inclined surface is arranged on the side of the lifting slider facing the first slider. When the second slider moves towards the first slider, the abutting inclined surface abuts against the driving inclined surface, driving the lifting slider to gradually move downwards, so that the second side plate is placed and attached to the top of the first side plate.

[0023] By adopting the above technical solution, the structural settings of the guiding structure and the second slider make it possible that when the second slider moves towards the first slider and the two sliders abut, while ensuring that the second side plate is always located on top of the first side plate, the welding joint between the second side plate and the first side plate can also be in a fitting state, improving the welding efficiency.

[0024] Optionally, the second feeding mechanism includes a second conveying frame for conveying positioning pieces, a second clamping assembly arranged on one side of the second conveying frame, and a second moving member for driving the second clamping assembly to slide and lift. When the positioning piece vertically descends to the corresponding side plate and is clamped and positioned by the second positioning mechanism 45, the clamping of the second clamping assembly is then released.

[0025] By adopting the above technical solution, the structural composition of the second feeding mechanism is disclosed. The second feeding mechanism feeds the positioning pieces one by one to the corresponding positions, realizing automatic feeding.

[0026] Optionally, the blanking mechanism includes a blanking belt, a third clamping assembly arranged on one side of the blanking belt and used for clamping the automotive side tail plate, and a placement rack for placing products.

[0027] By adopting the above technical solution, the welded product is blanked by the blanking mechanism. The blanking mechanism has a simple structure, reduces manual operation, and improves the forming efficiency of product welding.

[0028] Optionally, the spot welding robot includes a robot body and a spot welding assembly. The spot welding assembly includes a spot welding bracket disposed on the output shaft of the robot body, a spot welding driving member disposed on the spot welding bracket, a first spot welding head, and a second spot welding head. The spot welding bracket is rotatably mounted with an L-shaped bracket for mounting the first spot welding head. The output shaft of the spot welding driving member is connected to the second spot welding head and drives the second spot welding head to approach or move away from the first spot welding head.

[0029] By adopting the above technical solution, the robot body enables the spot welding assembly to have six degrees of freedom, with flexible rotation and a large welding range. The first spot welding head is fixed on the L-shaped bracket as a fixed point, and the second spot welding head moves back and forth through the spot welding driving member. The setting of the L-shaped bracket forms a moving gap between the first spot welding head and the second spot welding head, facilitating the insertion of the spot welding bracket along the length direction of the first side plate for welding the first side plate and the second side plate.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] The automatic spot welding device of the present application includes a fixed machine base, a station plate, a positioning table, a spot welding robot, a first feeding mechanism, a second feeding mechanism, and a discharging mechanism. The composition of the above multiple structures can realize the automatic spot welding operation of the automotive side tail plate, reducing the work of manual feeding and operating the spot welding device and improving the production efficiency of the automotive side tail plate;

[0032] Through the setting of two groups of positioning mechanisms and two groups of pressing mechanisms, the positioning and assembly of two side plates and three positioning pieces are realized, ensuring the stability during spot welding;

[0033] Through the cooperation of the first sliding table and the second sliding table, the two side plates are not prone to interference during feeding, and the second side plate is always located above the first side plate. When the first sliding table and the second sliding table are docked, the first side plate and the second side plate are brought into contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic structural diagram of the welded automotive side tail plate.

[0035] Figure 2 is an exploded view of the automotive side tail plate.

[0036] Figure 3 is a schematic diagram of the overall structure of an embodiment of the present application.

[0037] Figure 4 is a schematic structural diagram of the tail plate main body after positioning in an embodiment of the present application.

[0038] Figure 5 is a schematic structural diagram of the positioning table in an embodiment of the present application.

[0039] Figure 6 It is a schematic structural diagram of the first loading mechanism in the embodiment of the present application.

[0040] Figure 7 It is a schematic structural diagram when the first sliding table and the second sliding table in the embodiment of the present application are not docked.

[0041] Figure 8 It is a schematic cross-sectional view after the first sliding table and the second sliding table in the embodiment of the present application are docked.

[0042] Figure 9 It is a schematic structural diagram of the second welding station on the station plate in the embodiment of the present application.

[0043] Figure 10 It is a schematic structural diagram of the second loading mechanism and the unloading mechanism in the embodiment of the present application.

[0044] Figure 11 It is a schematic structural diagram of the spot welding manipulator in the embodiment of the present application.

[0045] Explanation of reference numerals: 1, automotive side tailboard; 11, first side plate; 111, first positioning hole; 12, second side plate; 121, second positioning hole; 122, third positioning hole; 13, positioning piece; 131, first folding piece; 1311, first through hole; 132, second folding piece; 1321, second through hole; 133, third folding piece; 2, fixed base; 3, station plate; 4, positioning table; 41, first positioning mechanism; 411, positioning bracket; 412, first positioning plug; 413, second positioning plug; 42, first pressing mechanism; 421, pressing bracket; 422, pressing extension rod; 423, pressing driving part; 43, first sliding table; 431, driving inclined plane; 432, plug joint; 4321, locking hole; 44, second sliding table; 441, sliding table base; 442, lifting sliding seat; 4421, abutting inclined plane; 443, plugging groove; 444, elastic plunger part; 45, second positioning mechanism; 451, first positioning component; 4511, moving bracket; 4512, third positioning plug; 452, second positioning component; 4521, fourth positioning plug; 46, second pressing mechanism; 461, pressing frame body; 462, second pressing plate; 463, inductor; 47, sliding mechanism; 5, spot welding manipulator; 51, manipulator body; 52, spot welding component; 521, spot welding bracket; 5211, L-shaped bracket; 522, spot welding driving part; 523, first spot welding head; 524, second spot welding head; 6, first loading mechanism; 61, first conveying frame; 611, conveying frame body; 62, first clamping component; 63, first moving part; 7, second loading mechanism; 71, second conveying frame; 72, second clamping component; 73, second moving part; 8, unloading mechanism; 81, third clamping component; 82, placing rack. Detailed implementation manners

[0046] The following is combined with Figure 1-11 This application is described in further detail.

[0047] The embodiment of the present application discloses an automatic spot welding device for a side tail panel of an automobile, which is used to realize automatic welding of a side tail panel 1 of an automobile.

[0048] Reference Figure 1 and Figure 2 The automobile side tail plate 1 comprises a first side plate 11, a second side plate 12 and three sets of positioning plates 13. The cross-sections of the first side plate 11 and the second side plate 12 are both U-shaped, and first positioning holes 111 are provided at both ends of the first side plate 11, and second positioning holes 121 are provided at both ends of the second side plate 12. The product after the first side plate 11 and the second side plate 12 are welded is defined as the side tail plate body. At the welding point of the first side plate 11 and the second side plate 12, the second side plate 12 is placed above the first side plate 11.

[0049] The three groups of positioning pieces 13 are defined as a first folding piece 131, a second folding piece 132 and a third folding piece 133. The three groups of positioning pieces 13 are all L-shaped and are welded to the bottom wall and the opposite side walls of the side tail plate body. The first folding piece 131 is welded to the first side plate 11, and the second and third folding pieces are welded to the second side plate 12. The first folding piece 131 has two first through holes 1311 that penetrate the two side end surfaces, the second folding piece 132 and the third folding piece 133 have second through holes 1321 that penetrate the two side end surfaces, and the second side plate 12 has a third positioning hole 122 corresponding to the second through holes 1321.

[0050] Reference Figure 3 The automatic spot welding device for the side tail plate of an automobile comprises a fixed machine base 2, a work station plate 3 rotatably mounted on the fixed machine base 2, a positioning table 4 arranged on the work station plate 3 and used for positioning and placing the side tail plate 1 of the automobile, and a spot welding manipulator 5 for performing welding operations.

[0051] The work station plate 3 is rotatably mounted on the top of the fixed machine base 2. The fixed machine base 2 is a rectangular box as a whole. A rotating drive member (not marked in the figure) for driving the work station plate 3 to rotate is installed in the fixed machine base 2. The work station plate 3 is a ring plate as a whole. The spot welding robot 5 is fixedly mounted on the top of the fixed machine base 2 and is located at the central through hole of the work station plate 3. The rotating drive member and the work station plate 3 are connected by a gear structure.

[0052] Reference Figure 3 and Figure 4, multiple groups of positioning stations 4 are installed on the workbench 3, and the multiple groups of positioning stations 4 are circumferentially and evenly spaced along the central axis of the workbench 3. Along the rotation direction of the workbench 3, a first feeding station, a first welding station, a second feeding station, a second welding station, and a discharging station are circumferentially arranged on the fixed machine base 2. In this embodiment, there are five positioning stations 4 on the workbench 3, so the workbench 3 rotates 72 degrees each time.

[0053] The fixed machine base 2 is provided with a first feeding mechanism 6 at the first feeding station, a second feeding mechanism 7 at the second feeding station, and a discharging mechanism 8 at the discharging station.

[0054] Combined Figure 5 , the positioning station 4 is provided with a first positioning mechanism 41 for plugging and matching with the first side plate 11 and the second side plate 12 and a first pressing mechanism 42 for pressing the two side plates. The first positioning mechanism 41 includes a plurality of positioning brackets 411 fixed to the positioning station 4, and the positioning brackets 411 are spaced at intervals along the extending direction of the side tail plate body. The tops of the positioning brackets 411 are adapted to fit with the bottoms of the two side plates to achieve the supporting effect on the two side plates. Among them, a first positioning plug post 412 for plugging and matching with the first positioning hole 111 is integrally provided at the top of the positioning bracket 411 corresponding to the first side plate 11. A second positioning plug post 413 for plugging and matching with the second positioning hole 121 is integrally provided at the top of the positioning bracket 411 corresponding to the second side plate 12.

[0055] The first pressing mechanism 42 includes a pressing bracket 421 rotatably installed on the positioning bracket 411, a pressing extension rod 422 provided at one end of the pressing bracket 421 and used for pressing the two side plates, and a pressing driving member 423. The pressing bracket 421 is hinged to the positioning bracket 411 through a hinge shaft, and the hinge shaft of the pressing bracket 421 is located outside the length direction of the first side plate 11 and the second side plate 12. The pressing driving member 423 is a driving motor fixed to the positioning bracket 411, which is used to drive the rotation of the hinge shaft of the pressing bracket 421, and the pressing driving member 423 is in gear transmission with the hinge shaft.

[0056] Refer to Figure 6, the first feeding mechanism 6 is used to convey the first side plate 11 and the second side plate 12 respectively. It includes two groups of first conveying frames 61, a first clamping assembly 62 arranged above the first conveying frame 61, and a first moving member 63 for driving the first clamping assembly 62 to slide and lift. The two groups of first conveying frames 61 are arranged at intervals, and the first conveying frame 61 has a conveying frame body 611 for installing the first clamping assembly 62. The first moving member 63 is a linear driving member in the prior art, which includes a horizontally installed linear module and a hoisting and lifting member arranged on the linear module. The linear module in the horizontal direction drives the hoisting and lifting member to move horizontally. A lifting plate for installing the first clamping assembly 62 is fixed to the steel wire rope of the hoisting and lifting member. In this embodiment, the first clamping assembly 62 is a clamping cylinder, which is used to hoist and place the first side plate 11 and the second side plate 12 on the first positioning mechanism 41.

[0057] Referring to Figure 6 and Figure 7 , since there is a distance between the two groups of first conveying frames 61, and the first moving member 63 can only perform linear conveying, in order to ensure the synchronous feeding of the first side plate 11 and the second side plate 12 and reduce the probability of interference during the feeding of the two side plates. The positioning table 4 is divided into two groups of positioning slides. One group of positioning slides is fixed to the working plate 3, and the other group of positioning slides is slidably installed on the working plate 3 through a sliding mechanism 47. The sliding mechanism 47 is a mechanism such as a cylinder or a motor screw drive in the prior art that can achieve linear motion. When the two groups of positioning slides are butted, a complete positioning table 4 is formed. The fixed positioning slide is defined as the first slide 43, and the slidably installed positioning slide is defined as the second slide 44. The first slide 43 is used for positioning and placing the first side plate 11, and the second slide 44 is used for positioning and placing the second side plate 12. The top surface height of the second slide 44 is higher than the top surface of the first slide 43, so that the second side plate 12 can be placed on top of the first side plate 11 after the two groups of positioning slides are fixed, reducing the probability of collision and interference between the two side plates.

[0058] In order to ensure that the first side plate 11 and the second side plate 12 are in a fitting state during welding, the two groups of positioning slide structures are also provided with a guiding structure. The guiding structure includes a driving inclined surface 431 arranged on the first slide 43 and an abutting inclined surface 4421 arranged on the second slide 44. The second slide 44 includes a slide base 441 and a lifting slide 442. The slide base 441 is connected to the sliding mechanism, and the lifting slide 442 is connected to the slide base 441 through an elastic member. The elastic member can be a compression spring member. When the second slide 44 moves towards the first slide 43, the driving inclined surface 431 and the abutting inclined surface 4421 are abutted, so that the height of the lifting slide 442 gradually decreases, making the second side plate 12 fit the first side plate 11.

[0059] Referring to Figure 6 and Figure 8, on the top of one side of the first sliding table 43 facing the second sliding table 44, there is also a socket joint 432 provided. The second sliding table 44 has a socket slot 443 for the socket joint 432 to be inserted into. On the inner wall of the socket slot 443 of the second sliding table 44, there is a receiving groove, and an elastic plunger 444 is installed in the receiving groove. The elastic plunger 444 includes a plunger housing, a plunger ball head, and a plunger spring connecting the plunger housing and the plunger ball head. The side wall of the socket joint 432 has a locking hole 4321 that cooperates with the plunger ball head of the elastic plunger 444.

[0060] Referring to Figure 5 and Figure 9 , a second positioning mechanism 45 is provided on the positioning table 4. The second positioning mechanism 45 includes a first positioning component 451 for fixing the first folded piece 131 and a second positioning component 452 for fixing the second folded piece 132 and the third folded piece 133. The first positioning component 451 is inserted into the first through hole 1311 from top to bottom. It includes a moving bracket 4511 slidably mounted on the station plate 3 and a third positioning plug 4512 vertically mounted at the end of the moving bracket 4511. The moving bracket 4511 is fixed to one side in the length direction of the side tail plate main body by means of bolts, welding, etc. The third positioning plug 4512 is lifted and lowered by a lifting cylinder. In the normal state, the third positioning plug 4512 and the first through hole 1311 are in a staggered state, that is, at the first welding station, the first positioning component 451 will not interfere with the welding operation of the first side plate 11 and the second side plate 12.

[0061] The second positioning component 452 includes a fourth positioning plug 4521 vertically mounted on the positioning table 4. The fourth positioning plug 4521 corresponds to the third positioning hole 122 one by one, and the fourth positioning plug 4521 is lifted and lowered in the vertical direction by a lifting cylinder. Before the feeding positioning piece 13, the top height of the fourth positioning plug 4521 is lower than the top surface height of the positioning bracket 411.

[0062] In order to further improve the stability of the three groups of positioning pieces 13 during welding, a second pressing mechanism 46 is also provided on the positioning table 4 adjacent to the first pressing mechanism 42. The second pressing mechanism 46 is integrally fixed to the positioning table 4. The second pressing mechanism 46 includes a pressing frame body 461 and a second pressing plate 462 rotatably mounted on the pressing frame body 461. A pressing driving part 423 for rotating the second pressing plate 462 is provided on the pressing frame body 461. The cooperation mode of the second pressing plate 462 and the pressing frame body 461 is the same as the cooperation mode of the pressing bracket 421 and the positioning bracket 411, and will not be repeated in this application. Among them, a sensor 463 for detecting the positioning piece 13 is also installed on the second pressing plate 462, and whether the positioning piece 13 is positioned is detected by the sensor 463.

[0063] Referring to Figure 10, the second feeding mechanism 7 includes three groups of second conveying frames 71, a second clamping assembly 72 installed on one side of the second conveying frame 71, and a second moving member 73 for driving the second clamping assembly 72 to slide and lift. The cooperation mode between the second moving member 73 and the second clamping assembly 72 is the same as that between the first moving member 63 and the first clamping assembly 62, and the second clamping assembly 72 is an adsorption structure of the prior art. The blanking mechanism 8 includes a third clamping assembly 81 located on one side of the blanking station and a placement rack 82 for placing products. The clamping principle of the third clamping assembly 81 is the same as that of the first clamping assembly 62, and the welded automotive side tailboard 1 is placed on the placement rack 82 at intervals through the third clamping assembly 81.

[0064] Referring to Figure 11 , the spot welding manipulator 5 includes a manipulator body 51 and a spot welding assembly 52. The manipulator body 51 is a six-axis robot of the prior art. The spot welding assembly 52 is fixedly installed at the output end of the manipulator body 51. The spot welding assembly 52 includes a spot welding bracket 521, a spot welding driving member 522, a first spot welding head 523, and a second spot welding head 524. The spot welding bracket 521 is L-shaped. One end of it is fixed to the output end of the manipulator body 51, and the other end is also rotatably installed with an L-shaped bracket 5211. The L-shaped bracket 5211 is rotated by a rotating cylinder. The first spot welding head 523 is fixed to the end of the L-shaped bracket 5211 away from the spot welding bracket 521, and the spot welding driving member 522 is a pushing cylinder member fixed to the spot welding bracket 521. The second spot welding head 524 is fixed to the piston rod of the spot welding driving member 522. The second spot welding head 524 corresponds to the first spot welding head 523, and there is a gap between the two, so that the spot welding bracket 521 can be inserted from the end of the first side plate 11 to perform the welding and fixing of the first side plate 11 and the second side plate 12.

[0065] The implementation principle of an automatic spot welding device for an automotive side tailboard in an embodiment of the present application is as follows: The first side plate 11 and the second side plate 12 are respectively conveyed to the first sliding table 43 and the second sliding table 44 through the first feeding mechanism 6, and the positioning of the two side plates is realized under the action of the first positioning mechanism 41 and the first pressing mechanism 42; the sliding mechanism is started, so that the second sliding table 44 slides towards the first sliding table 43, and under the action of the guiding structure, the second side plate 12 is attached to the top of the first side plate 11, and the two sliding tables are fixed through the insertion joint 432 and the elastic plunger 444;

[0066] The station plate 3 is rotated, the welding of the two side plates is completed at the first welding station, and then the feeding of the three positioning pieces 13 is completed at the second feeding station. The preliminary positioning is realized through the second positioning mechanism 45, and it is rotated to the second welding station. The side plates are further pressed by the second pressing mechanism 46 and then the spot welding fixing of the positioning pieces 13 is carried out; finally, it is rotated to the blanking station for the blanking of the automotive side tailboard.

[0067] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An automatic spot welding device for a side tail plate of an automobile, used for welding a side tail plate of an automobile (1), wherein the side tail plate of the automobile (1) comprises a first side plate (11), a second side plate (12) and a positioning plate (13), wherein first positioning holes (111) are arranged on opposite sides of the first side plate (11), and second positioning holes (121) are arranged on opposite sides of the second side plate (12), wherein: The invention comprises a fixed machine base (2), a spot welding robot (5), a work station plate (3) rotatably mounted on the fixed machine base (2), and a positioning platform (4) circumferentially arranged on the work station plate (3) and used for positioning and placing a side tail plate (1) of an automobile, wherein the positioning platform (4) is provided with a first positioning mechanism (41) pluggably engaged with a first positioning hole (111) and a second positioning hole (121), and a first clamping mechanism (42) for clamping the first side plate (11) and the second side plate (12); The fixed machine base (2) is provided with a first loading station, a first welding station, a second loading station, a second welding station and a blanking station in sequence along the rotation direction of the station plate (3); the fixed machine base (2) is provided with a first loading mechanism (6) for loading the first side plate (11) and the second side plate (12) at the first loading station, a second loading mechanism (7) for loading the positioning sheet (13) at the second loading station, and a blanking mechanism (8) for blanking the assembled product at the blanking station; The first feeding mechanism (6) comprises a first conveying frame (61), a first clamping assembly (62) arranged above the first conveying frame (61), and a first moving member (63) for driving the first clamping assembly (62) to slide and rise and fall; The positioning platform (4) comprises a first slide (43) and a second slide (44), wherein the first slide (43) is fixed to the positioning platform (4), and the second slide (44) is slidably mounted on the positioning platform (4), wherein a first positioning pin (412) for plugging and matching with the first side plate (11) is located on the first slide (43), and a second positioning pin (413) for plugging and matching with the second side plate (12) is located on the second slide (44), and the top surface of the second slide (44) is higher than that of the first slide (43); the positioning platform (4) is provided with a guide The guide structure comprises a driving inclined surface (431) arranged on the first slide (43) and an abutting inclined surface (4421) arranged on the second slide (44); the second slide (44) comprises a slide base (441), a lifting slide (442) and an elastic member connecting the slide base (441) and the lifting slide (442); the abutting inclined surface (4421) is arranged on the side of the lifting slide (442) facing the first slide (43); the lifting slide (442) is connected to the slide base (441) via the elastic member; When the second slide (44) moves toward the first slide (43), the abutting inclined surface (4421) abuts against the driving inclined surface (431), driving the lifting slide (442) to gradually move downward, and the height of the lifting slide (442) gradually moves downward, so that the second side plate (12) is placed on the top of the first side plate (11).

2. The automatic spot welding device for automobile side tail plate according to claim 1 is characterized in that: The first positioning mechanism (41) comprises a plurality of positioning brackets (411) arranged on the positioning platform (4), a first positioning plug column (412) arranged on the positioning bracket (411) and corresponding to the first positioning hole (111), and a second positioning plug column (413) arranged on the positioning bracket (411) and corresponding to the second positioning hole (121); The first clamping mechanism (42) comprises a clamping bracket (421) rotatably disposed on the positioning bracket (411), a clamping extension rod (422) disposed on the clamping bracket (421) and used to clamp the first side plate (11) and the second side plate (12), and a clamping driving member (423) driving the clamping bracket (421) to rotate. The first clamping mechanisms (42) are arranged at intervals along the extension direction of the automobile side tail plate (1).

3. The automatic spot welding device for automobile side tail plate according to claim 1 is characterized in that: The positioning piece (13) comprises a first folding piece (131), a second folding piece (132) and a third folding piece (133); the first folding piece (131) is provided with at least two first through holes (1311); the second folding piece (132) and the third folding piece (133) are provided with second through holes (1321); the first side plate (11) and the second side plate (12) are both provided with third positioning holes (122) corresponding to the second through holes (1321); the positioning platform (4) is provided with a second positioning mechanism (45) for fixing the positioning piece (13); the second positioning mechanism (45) comprises a first positioning component (451) inserted into the first through hole (1311) from top to bottom and a second positioning component (452) passing through the third positioning hole (122) and the second through hole (1321) in sequence from bottom to top.

4. The automatic spot welding device for automobile side tail plate according to claim 3 is characterized in that: The first positioning component (451) comprises a movable bracket (4511) slidably mounted on the work station plate (3) and a third positioning plug post (4512) mounted at the end of the movable bracket (4511) in a lifting manner; The second positioning assembly (452) comprises a fourth positioning plug post (4521) which is lifted and mounted on the positioning platform (4) and corresponds to the third positioning hole (122).

5. The automatic spot welding device for automobile side tail plate according to claim 3 is characterized in that: The work station plate (3) is provided with a second clamping mechanism (46) at the second welding station, the second clamping mechanism (46) and the first clamping mechanism (42) are arranged alternately, the second clamping mechanism (46) comprises a clamping frame (461) and a second clamping plate (462) rotatably mounted on the clamping frame (461), and the second clamping plate (462) and the second positioning assembly (452) are both provided with a sensor (463) for sensing the positioning sheet (13).

6. The automatic spot welding device for automobile side tail plate according to claim 1 is characterized in that: The second feeding mechanism (7) comprises a second conveying frame (71) for conveying the positioning piece (13), a second clamping assembly (72) arranged on one side of the second conveying frame (71), and a second moving member (73) for driving the second clamping assembly (72) to slide and rise and fall. When the positioning piece (13) vertically descends to the corresponding side plate and is clamped by the second positioning mechanism 45, the clamping of the second clamping assembly (72) is released.

7. The automatic spot welding device for automobile side tail plate according to claim 1 is characterized in that: The unloading mechanism (8) comprises a third clamping assembly (81) arranged at the unloading station and used for clamping the automobile side tail plate (1), and a placement rack (82) used for placing the automobile side tail plate (1).

8. The automatic spot welding device for automobile side tail plate according to claim 1 is characterized in that: The spot welding robot (5) comprises a robot body (51) and a spot welding assembly (52); the spot welding assembly (52) comprises a first spot welding head (523), a second spot welding head (524), a spot welding bracket (521) arranged on an output shaft of the robot body (51), and a spot welding driving member (522) arranged on the spot welding bracket (521); the spot welding bracket (521) is rotatably mounted with an L-shaped bracket (5211) for mounting the first spot welding head (523); the output shaft of the spot welding driving member (522) is connected to the second spot welding head (524), driving the second spot welding head (524) to move closer to or away from the first spot welding head (523).

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