Automatic spot welding device for automobile side tail plate

Abstract

The present application relates to an automatic spot welding device for a side tail plate of an automobile, and belongs to the technical field of automatic spot welding. The automatic spot welding device comprises a fixed machine base, a station plate, a positioning platform and a spot welding manipulator, a first positioning hole is arranged on the opposite sides of the first side plate, a second positioning hole is arranged on the opposite sides of the second side plate, and the positioning platform is provided with a positioning mechanism and a clamping mechanism; the fixed machine base is provided with a first loading station, a first welding station, a second loading station, a second welding station and a unloading station in sequence along the rotation direction of the station plate, and 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 sheet at the second loading position, and a unloading mechanism for unloading the assembled product at the unloading station. The present application has the function of realizing the automatic welding of the side tail plate of an automobile and improving the welding efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of automatic spot welding, and in particular to an automatic spot welding device for a side tail panel of an automobile. Background Art

[0002] The side tail panel of a car is an important part of the car body. As the overall structure of the side tail panel is relatively complex, it is usually composed of multiple metal parts welded together. Figure 1 A common automobile side tail panel includes a first side panel, a second side panel and three sets of positioning pieces.

[0003] Currently, there is a lack of dedicated automated equipment for the welding and assembly of automobile side panels. Individual parts must be manually loaded and positioned for installation. Once positioned, the welding equipment is used to spot weld the joints. This welding process suffers from slow loading and unloading, complex positioning operations, and low welding efficiency. Summary of the Invention

[0004] In order to realize the automated welding of automobile side tail panels and improve welding efficiency, the present application provides an automatic spot welding device for automobile side tail panels.

[0005] The present application provides an automatic spot welding device for automobile side tail panels, which adopts the following technical solutions: An automatic spot welding device for a side tail panel of an automobile is used for welding the side tail panel of an automobile. First positioning holes are provided on opposite sides of a first side panel, and second positioning holes are provided on opposite sides of a second side panel. The device comprises a fixed machine base, a work station plate rotatably mounted on the fixed machine base, a positioning platform circumferentially arranged on the work station plate and used for positioning and placing the side tail panel, and a spot welding manipulator. The positioning platform is provided with a first positioning mechanism that plugs and cooperates with the first positioning hole and the second positioning hole, and a first pressing mechanism for pressing the first side panel and the second side panel. The fixed machine base is provided with a first loading station, a first welding station, a second loading station, a second welding station and a unloading station in sequence along the rotation direction of the work station plate. The fixed machine base is provided with a first loading mechanism for loading the first side panel and the second side panel at the loading station, a second loading mechanism for loading the positioning sheet at the second loading station, and a unloading mechanism for unloading the assembled product at the unloading station.

[0006] By adopting the above technical solution, when the above automatic spot welding device is used, the first side panel and the second side panel are loaded to the loading station of the fixed machine base through the first loading mechanism; the station plate is rotated, and the preliminarily assembled first side panel and the second side panel are moved to the first welding station, and the first side panel and the second side panel are welded and fixed by the spot welding robot at the first welding station; the station plate is rotated again so that the positioning table is moved to the second loading station, and three sets of positioning pieces are loaded at the second loading station; then the positioning table is rotated, and the positioning pieces are welded and fixed at the second welding station; finally, the welded automobile side tail panel is unloaded through the unloading mechanism; the automatic spot welding device realizes the automatic welding of automobile side panels, and the positioning and assembly of the first side panel, the second side panel and the three sets of positioning pieces are relatively convenient. The spot welding robot is used for welding operations, which greatly reduces manual operations and improves the welding and forming efficiency of products.

[0007] Optionally, the first positioning mechanism includes a plurality of positioning brackets provided on the positioning platform, first positioning pins provided on the positioning brackets and corresponding to the first positioning holes, and second positioning pins provided on the positioning brackets and corresponding to the second positioning holes; The first clamping mechanism includes a clamping bracket rotatably arranged on the positioning bracket, a clamping extension rod arranged on the clamping bracket and used to clamp the two side panels, and a clamping drive member driving the clamping bracket to rotate. The first clamping mechanisms are arranged at intervals along the extension direction of the automobile side tail panel.

[0008] By adopting the above technical solution, the structural composition of the first positioning mechanism and the first clamping mechanism is disclosed. When the first side panel is loaded onto the positioning platform by the first loading mechanism, the first positioning pin is first plugged into and matched with the first positioning hole of the first side panel to achieve preliminary positioning, and the second side panel is plugged into and matched with the second positioning pin. After the first side panel and the second side panel are positioned, the clamping bracket is rotated so that the clamping extension rod is pressed downward and fits tightly against the tops of the two side panels, thereby improving the stability of the first side panel and the second side panel when welded under stress, so that the side tail panel of the automobile is not easily shaken or displaced when subjected to external force.

[0009] Optionally, the positioning piece includes a first folding piece, a second folding piece and a third folding piece, the first folding piece is provided with at least two first through-holes, the second folding piece and the third folding piece are provided with a second through-hole, the first side panel and the second side panel are both provided with a third positioning hole corresponding to the second through-hole, the positioning platform 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 passing through the third positioning hole and the second through-hole in sequence from bottom to top.

[0010] By adopting the above technical solution, the positioning piece includes a first folding piece, a second folding piece and a third folding piece. The three groups of positioning pieces can be positioned on the side tail plate of the car through the second positioning mechanism frame, thereby ensuring the stability of the positioning piece during welding. 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.

[0011] Optionally, the first positioning assembly includes a movable bracket slidably mounted on the work station plate and a third positioning pin lifted and mounted on the end of the movable bracket; The second positioning assembly includes a fourth positioning column which is lifted and mounted on the positioning platform and corresponds to the third positioning hole.

[0012] By adopting the above technical solution, the first positioning assembly is slidably installed on the positioning platform, and the second positioning assembly is lifted and installed on the positioning platform, so that the two groups of positioning assemblies have little effect on the welding of the first side plate and the second side plate.

[0013] Optionally, the operating table is provided with a second clamping mechanism at the second welding station, and the second clamping mechanism and the first clamping mechanism are arranged alternately, and the second clamping mechanism includes a clamping frame and a second clamping plate rotatably mounted on the clamping frame, and the second clamping plate and the second positioning assembly are both provided with sensors for sensing the positioning piece.

[0014] By adopting the above technical solution, the setting of the second clamping mechanism can further improve the fixing effect of the three sets of positioning plates on the two side panels. The placement of the positioning plates can be detected by the sensor. After the positioning plates are detected, the welding operation is performed to ensure the welding accuracy.

[0015] Optionally, the first loading mechanism includes a first conveying frame, a clamping assembly provided above the first conveying frame, and a first moving member for driving the clamping assembly to slide and rise; The positioning platform includes a first slide and a second slide. The first slide is fixed to the positioning platform, and the second slide is slidably installed on the positioning platform. The first positioning pin for plugging and mating with the first side panel is located on the first slide, and the second positioning pin for plugging and mating with the second side panel is located on the second slide. The top surface of the second slide is higher than that of the first slide.

[0016] 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 transported to the side close to the positioning platform on two groups of first conveyor racks. The first side plate and the second side plate are positioned and installed on the two positioning slides by the first clamping member and the second clamping member respectively, and then the two positioning slides are driven to move in a direction approaching each other, so that the second side plate is placed on the top of the first side plate, thereby realizing the preliminary positioning of the two side plates. The above-mentioned first feeding mechanism has a simple structure and high automation efficiency, thereby improving the feeding efficiency.

[0017] Optionally, the positioning platform is provided with a guide structure, which includes a driving inclined surface provided on the first slide and an abutting inclined surface provided on the second slide, the second slide includes a slide base, a lifting slide and an elastic member connecting the slide base and the lifting slide, the abutting inclined surface is provided on the side of the lifting slide facing the first slide, when the second slide moves toward the first slide, the abutting inclined surface abuts the driving inclined surface, driving the lifting slide to gradually move downward, so that the second side panel is placed on top of the first side panel.

[0018] By adopting the above technical solution, the guide structure and the structural setting of the second slide make it possible to ensure that the second side plate is always located on the top of the first side plate when the second slide moves toward the first slide and the two slides abut against each other, and also to make the welding point between the second side plate and the first side plate fit together, thereby improving welding efficiency. Optionally, the second loading mechanism includes a second conveying frame for conveying the positioning piece, a second clamping assembly arranged on one side of the second conveying frame, and a second movable member for driving the second clamping assembly to slide and lift. When the positioning piece vertically drops to the corresponding side plate and is clamped by the second positioning mechanism 45, the clamping of the second clamping assembly is released.

[0019] By adopting the above technical solution, the structural composition of the second feeding mechanism is disclosed, and the positioning pieces of the second feeding mechanism components feed materials to corresponding positions one by one, thereby realizing automatic feeding.

[0020] Optionally, the blanking mechanism includes a blanking belt, a third clamping assembly arranged on one side of the blanking belt and used to clamp the side tail panel of the automobile, and a placement rack for placing products.

[0021] By adopting the above technical solution, the welded product is unloaded through the unloading mechanism, which has a simple structure, reduces manual operation, and improves the product welding and forming efficiency.

[0022] Optionally, the spot welding robot includes a robot body and a spot welding assembly, the spot welding assembly includes a spot welding bracket arranged on the output shaft of the robot body, a spot welding drive arranged on the spot welding bracket, a first spot welding head and a second spot welding head, the spot welding bracket is rotatably installed with an L-shaped bracket for installing the first spot welding head, the output shaft of the spot welding drive 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.

[0023] By adopting the above technical solution, the robot body enables the spot welding assembly to have six degrees of freedom, 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 is moved back and forth by the spot welding drive component. The setting of the L-shaped bracket forms a moving gap between the first spot welding head and the second spot welding head, which facilitates the insertion of the spot welding bracket along the length direction of the first side plate to weld the first side plate and the second side plate.

[0024] In summary, this application includes at least one of the following beneficial technical effects: The automatic spot welding device of the present application includes a fixed machine base, a work station plate, a positioning table, a spot welding manipulator, a first loading mechanism, a second loading mechanism, and a unloading mechanism. The above-mentioned multiple structures can realize the automated spot welding operation of automobile side tail panels, reduce the manual loading and operation of the spot welding device, and improve the production efficiency of automobile side tail panels; The present application realizes the positioning and assembly of two side plates and three positioning pieces by setting two sets of positioning mechanisms and two sets of pressing mechanisms, thereby ensuring stability during spot welding. In this application, the cooperation between the first slide and the second slide makes it difficult for the two side panels to interfere with each other during loading, and the second side panel is always located above the first side panel. When the first slide and the second slide are docked, the first side panel and the second side panel are fitted together. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the automobile side tail panel after welding.

[0026] Figure 2 This is a schematic diagram of the explosion of the car's side tailgate.

[0027] Figure 3 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 4 It is a schematic structural diagram of the tailgate body after positioning is completed according to an embodiment of the present application.

[0029] Figure 5 It is a structural diagram of the positioning platform according to an embodiment of the present application.

[0030] Figure 6 It is a structural diagram of the first feeding mechanism of an embodiment of the present application.

[0031] Figure 7 This is a structural diagram of the first slide and the second slide in the embodiment of the present application when they are not docked.

[0032] Figure 8 It is a cross-sectional schematic diagram of the first slide and the second slide after docking in the embodiment of the present application.

[0033] Figure 9It is a structural schematic diagram of the second welding station on the station plate of an embodiment of the present application.

[0034] Figure 10 It is a structural diagram of the second loading mechanism and unloading mechanism of the embodiment of the present application.

[0035] Figure 11 It is a structural schematic diagram of the spot welding robot according to an embodiment of the present application.

[0036] Explanation of Reference Numerals: 1. Automobile side tail panel; 11. First side panel; 111. First positioning hole; 12. Second side panel; 121. Second positioning hole; 122. Third positioning hole; 13. Positioning piece; 131. First folding piece; 1311. First penetration hole; 132. Second folding piece; 1321. Second penetration hole; 133. Third folding piece; 2. Fixed base; 3. Work station plate; 4. Positioning platform; 41. First positioning mechanism; 411, positioning bracket; 412, first positioning pin; 413, second positioning pin; 42, first clamping mechanism; 421, clamping bracket; 422, clamping extension rod; 423, clamping drive member; 43, first slide; 431, driving inclined surface; 432, plug connector; 4321, locking hole; 44, second slide; 441, slide base; 442, lifting slide; 4421, abutting inclined surface; 443, plug slot; 44 4. Elastic plunger; 45. Second positioning mechanism; 451. First positioning assembly; 4511. Movable bracket; 4512. Third positioning pin; 452. Second positioning assembly; 4521. Fourth positioning pin; 46. Second clamping mechanism; 461. Clamping frame; 462. Second clamping plate; 463. Sensor; 47. Sliding mechanism; 5. Spot welding manipulator; 51. Manipulator body; 52. Spot welding assembly; 521. Spot welding Bracket; 5211, L-shaped bracket; 522, spot welding drive member; 523, first spot welding head; 524, second spot welding head; 6, first loading mechanism; 61, first conveyor rack; 611, conveyor rack body; 62, first clamping assembly; 63, first moving member; 7, second loading mechanism; 71, second conveyor rack; 72, second clamping assembly; 73, second moving member; 8, unloading mechanism; 81, third clamping assembly; 82, placement rack. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-11 This application is described in further detail.

[0038] 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.

[0039] Reference Figure 1 and Figure 2The automobile tail panel 1 includes a first side panel 11, a second side panel 12, and three sets of positioning plates 13. The first and second side panels 11, 12 are both U-shaped in cross-section. First positioning holes 111 are defined at both ends of the first side panel 11, while second positioning holes 121 are defined at both ends of the second side panel 12. The product formed by welding the first and second side panels 11, 12 is defined as the tail panel body. At the weld between the first and second side panels 11, 12, the second side panel 12 rests on top of the first side panel 11.

[0040] The three sets of positioning pieces 13 are defined as a first folding piece 131, a second folding piece 132, and a third folding piece 133. All three sets of positioning pieces 13 are L-shaped and welded to the bottom wall and two opposite side walls of the side tail plate body. The first folding piece 131 is welded to the first side plate 11, while 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 extending through its two end surfaces. The second and third folding pieces 132 and 133 have second through-holes 1321 extending through their two end surfaces. The second side plate 12 has third positioning holes 122 corresponding to the second through-holes 1321.

[0041] Reference Figure 3 The automatic spot welding device for the automobile side tail panel includes a fixed machine base 2, a work station plate 3 rotatably mounted on the fixed machine base 2, a positioning platform 4 arranged on the work station plate 3 and used for positioning and placing the automobile side tail panel 1, and a spot welding robot 5 for performing welding operations.

[0042] The work station plate 3 is rotatably mounted atop the fixed base 2. The fixed base 2 is a rectangular box, housing a rotating drive element (not shown) that drives the work station plate 3. The work station plate 3 is an annular plate. The spot welding robot 5 is fixedly mounted atop the fixed base 2 and positioned within the central through-hole of the work station plate 3. The rotating drive element and the work station plate 3 are connected by a gear mechanism.

[0043] Reference Figure 3 and Figure 4 The work plate 3 is equipped with multiple sets of positioning platforms 4, evenly spaced circumferentially along the central axis of the work plate 3. The fixed base 2 is circumferentially arranged along the rotational direction of the work plate 3, with a first loading station, a first welding station, a second loading station, a second welding station, and an unloading station. In this embodiment, the work plate 3 has five positioning platforms 4, so the work plate 3 rotates 72 degrees each time.

[0044] The fixed machine base 2 is provided with a first loading mechanism 6 at the first loading station, a second loading mechanism 7 at the second loading station, and a blanking mechanism 8 at the blanking station.

[0045] Combine Figure 5The positioning platform 4 is provided with a first positioning mechanism 41 for plugging and matching with the first side panel 11 and the second side panel 12, and a first pressing mechanism 42 for pressing the two side panels. The first positioning mechanism 41 includes a plurality of positioning brackets 411 fixed to the positioning platform 4, and the positioning brackets 411 are arranged one by one at intervals along the extension direction of the side tail panel body. The top of the positioning bracket 411 and the bottom of the two side panels are adapted to fit together to achieve the supporting effect on the two side panels. Among them, the top of the positioning bracket 411 corresponding to the first side panel 11 is integrally provided with a first positioning pin 412 for plugging and matching with the first positioning hole 111. The top of the positioning bracket 411 corresponding to the second side panel 12 is integrally provided with a second positioning pin 413 for plugging and matching with the second positioning hole 121.

[0046] The first clamping mechanism 42 comprises a clamping bracket 421 rotatably mounted on the positioning bracket 411, a clamping extension rod 422 disposed at one end of the clamping bracket 421 and configured to clamp the two side panels, and a clamping driver 423. The clamping bracket 421 is hingedly connected to the positioning bracket 411 via a hinge axis, with the hinge axis of the clamping bracket 421 located longitudinally outward from the first and second side panels 11, 12. The clamping driver 423 is a drive motor fixed to the positioning bracket 411, configured to drive the rotation of the hinge axis of the clamping bracket 421. The clamping driver 423 and the hinge axis are connected via a gear transmission.

[0047] Reference Figure 6 The first loading mechanism 6 is used to transport the first side panel 11 and the second side panel 12 respectively, and includes two groups of first conveying frames 61, a first clamping assembly 62 arranged above the first conveying frames 61, and a first moving member 63 that drives 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 lifting member arranged on the linear module, and the horizontal linear module drives the hoisting lifting member to move horizontally. The steel wire rope of the hoisting lifting member is fixed with a lifting plate for installing the first clamping assembly 62. In this embodiment, the first clamping assembly 62 is a clamping cylinder, which is used to hoist the first side panel 11 and the second side panel 12 and place them on the first positioning mechanism 41.

[0048] Reference Figure 6 and Figure 7, since there is a distance between the two groups of first conveying racks 61, and the first movable member 63 can only transport in a straight line, in order to ensure the synchronous loading of the first side panel 11 and the second side panel 12, and reduce the probability of interference between the loading of the two side panels. The positioning platform 4 is divided into two groups of positioning slides, one of which is fixed to the work station plate 3, and the other is slidably installed on the work station plate 3 through a sliding mechanism 47. The sliding mechanism 47 is a mechanism that can achieve linear motion such as a cylinder or motor screw drive in the existing technology. When the two groups of positioning slides are docked, a complete positioning platform 4 is formed. The fixed positioning slide is defined as the first slide 43, and the slidingly installed positioning slide is defined as the second slide 44. The first slide 43 is used for positioning and placing the first side panel 11, and the second slide 44 is used for positioning and placing the second side panel 12. The top surface of the second slide 44 is higher than the top surface of the first slide 43, so that after the two groups of positioning slides are fixed, the second side panel 12 can be placed on top of the first side panel 11, reducing the probability of collision and interference between the two side panels.

[0049] In order to ensure that the first side panel 11 and the second side panel 12 are in a fitted state when being welded, the two sets of positioning slide structures are also provided with a guide structure. The guide structure includes a driving inclined surface 431 provided on the first slide 43 and an abutting inclined surface 4421 provided 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 toward the first slide 43, the driving inclined surface 431 and the abutting inclined surface 4421 abut against each other, so that the height of the lifting slide 442 gradually moves down, so that the second side panel 12 fits the first side panel 11.

[0050] Reference Figure 6 and Figure 8 The first slide 43 also has a plug connector 432 on its top side facing the second slide 44. The second slide 44 has a socket 443 for inserting the plug connector 432. The second slide 44 has a receiving groove on the inner wall of the socket 443, in which an elastic plunger 444 is mounted. The elastic plunger 444 includes a plunger housing, a plunger ball, and a plunger spring connecting the plunger housing and the plunger ball. The sidewall of the plug connector 432 has a locking hole 4321 that engages with the plunger ball of the elastic plunger 444.

[0051] Reference Figure 5 and Figure 9A second positioning mechanism 45 is provided on the positioning platform 4. The second positioning mechanism 45 includes a first positioning component 451 for fixing the first folding piece 131 and a second positioning component 452 for fixing the second folding piece 132 and the third folding piece 133. The first positioning component 451 is inserted into the first through-hole 1311 from top to bottom, and includes a movable bracket 4511 slidably mounted on the work station plate 3 and a third positioning pin 4512 lifted and lowered at the end of the movable bracket 4511. The movable bracket 4511 is fixed to one side of the length direction of the side tail plate body by bolts, welding, etc., and the third positioning pin 4512 is lifted and lowered by a lifting cylinder. Under normal conditions, the third positioning pin 4512 and the first through-hole 1311 are in an interlaced state, that is, at the first welding station, the first positioning component 451 will not interfere with the welding operation of the first side panel 11 and the second side panel 12.

[0052] The second positioning assembly 452 includes a fourth positioning pin 4521 that is mounted on the positioning platform 4. The fourth positioning pin 4521 corresponds to the third positioning hole 122 and is vertically raised and lowered by a lifting cylinder. Before the positioning plate 13 is loaded, the top of the fourth positioning pin 4521 is lower than the top surface of the positioning bracket 411.

[0053] In order to further improve the stability of the three groups of positioning plates 13 during welding, the positioning platform 4 is further provided with a second clamping mechanism 46 adjacent to the first clamping mechanism 42, and the second clamping mechanism 46 is fixed to the positioning platform 4 as a whole. The second clamping mechanism 46 includes a clamping frame 461 and a second clamping plate 462 rotatably mounted on the clamping frame 461. The clamping frame 461 is provided with a clamping drive 423 that rotates with the second clamping plate 462. The cooperation method of the second clamping plate 462 and the clamping frame 461 is consistent with the cooperation method of the clamping bracket 421 and the positioning bracket 411, and will not be repeated in this application. Among them, a sensor 463 for detecting the positioning plate 13 is also installed on the second clamping plate 462, and the sensor 463 is used to detect whether the positioning plate 13 has completed positioning.

[0054] Reference Figure 10 The second loading 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 movable member 73 that drives the second clamping assembly 72 to slide and rise and fall. The cooperation method of the second movable member 73 and the second clamping assembly 72 is consistent with the cooperation method of the first movable member 63 and the first clamping assembly 62. The second clamping assembly 72 is an adsorption structure of the prior art. The unloading mechanism 8 includes a third clamping assembly 81 located on one side of the unloading station and a placement rack 82 for placing products. The clamping principle of the third clamping assembly 81 is consistent with that of the first clamping assembly 62. The welded automobile side tail panel 1 is placed on the placement rack 82 at intervals through the third clamping assembly 81.

[0055] Reference Figure 11 The spot welding robot 5 includes a robot body 51 and a spot welding assembly 52. ​​The robot body 51 is a six-axis robot in the prior art. The spot welding assembly 52 is fixedly installed at the output end of the robot body 51. The spot welding assembly 52 includes a spot welding bracket 521, a spot welding driver 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 which is fixed to the output end of the robot body 51, and the other end is also rotatably mounted with an L-shaped bracket 5211, and the L-shaped bracket 5211 is rotated by rotating the cylinder. The first spot welding head 523 is fixed to one end of the L-shaped bracket 5211 away from the spot welding bracket 521, and the spot welding driver 522 is a pushing cylinder 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 and the first spot welding head 523 correspond to each other, and a gap is formed between the two so that the spot welding bracket 521 can be inserted from the end of the first side plate 11 to weld and fix the first side plate 11 and the second side plate 12.

[0056] The working principle of the automatic spot welding device for automobile side tail panels according to the embodiment of the present application is as follows: the first side panel 11 and the second side panel 12 are respectively transported to the first slide 43 and the second slide 44 by the first feeding mechanism 6, and the two side panels are positioned under the action of the first positioning mechanism 41 and the first pressing mechanism 42; the sliding mechanism is activated to cause the second slide 44 to slide toward the first slide 43, and the second side panel 12 is affixed to the top of the first side panel 11 under the action of the guide structure, and the two slides are fixed by the plug connector 432 and the elastic plunger 444; Rotate the work station plate 3, complete the welding of the two side panels at the first welding station, then complete the loading of the three positioning pieces 13 at the second loading station, achieve preliminary positioning through the second positioning mechanism 45, rotate to the second welding station, further press the side panels through the second clamping mechanism 46, and then perform spot welding to fix the positioning pieces 13; finally, rotate to the unloading station to unload the side tail panel of the automobile.

[0057] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic spot welding device for a side tail plate of an automobile, used for welding a side tail plate (1) of an automobile, wherein first positioning holes (111) are arranged on opposite sides of a first side plate (11), and second positioning holes (121) are arranged on opposite sides of a second side plate (12), characterized in that: The invention comprises a fixed machine base (2), a work station plate (3) rotatably mounted on the fixed machine base (2), 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, and a spot welding manipulator (5); the positioning platform (4) is provided with a first positioning mechanism (41) pluggably engaged with the first positioning hole (111) and the second positioning hole (121), and a first pressing mechanism (42) for pressing 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 unloading 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 loading station, a second loading mechanism (7) for loading the positioning sheet (13) at the second loading station, and a unloading mechanism (8) for unloading the assembled product at the unloading 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) includes 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 installed on the positioning platform (4), 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 height of the second slide (44) is higher than that of the first slide (43).

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 positioning platform (4) is provided with a guiding structure, which includes a driving inclined surface (431) provided on the first slide (43) and an abutting inclined surface (4421) provided on the second slide (44); the second slide (44) includes 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 provided on the side of the lifting slide (442) facing the first slide (43); 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, so that the second side plate (12) is placed on the top of the first side plate (11).

7. 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.

8. 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).

9. The automatic spot welding device for automobile side tail plate according to claim 1, 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 spot welding bracket (521) arranged on an output shaft of the robot body (51), a spot welding driving component (522) arranged on the spot welding bracket (521), a first spot welding head (523) and a second spot welding head (524); 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 component (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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