Automobile assembly part welding equipment and welding method

Abstract

The invention relates to the technical field of assembly part welding, and discloses automobile assembly part welding equipment and a welding method.The automobile assembly part welding equipment comprises a welding base plate and a flexible bending frame located above the welding base plate, and a plurality of welding rods welded to the top of the welding base plate are inserted into the flexible bending frame; a torsion spring driving the welding rod to be dispersed is arranged in the flexible bending frame, rotating blocks rotating on the side wall of the flexible bending frame are fixed to the two ends of the torsion spring, a pulling belt driving the welding rod to turn over is wound around the outer side wall of the welding rod, and a rotating sliding ring driving the pulling belt to rotate is arranged at the top of the flexible bending frame. The characteristics of the torsion spring are adopted, so that the distance between every two adjacent positioning rod assemblies is a fixed value, the distance between every two adjacent welding rods is detected by changing the position of the sliding block in the sliding hole, namely, the screw pitch of the torsion spring is driven to change by twisting the rotating block, and the distance between every two adjacent welding rods is detected. And finally, the distance between every two adjacent welding rods on the top of the welding base plate is changed.

Description

Technical Field

[0001] The invention relates to the technical field of assembly welding, and in particular to an automobile assembly welding device and a welding method. Background Art

[0002] In the process of automobile manufacturing, it is necessary to effectively weld the vehicle's assembly parts, so that scattered automobile assembly parts can be assembled into a complete vehicle. In the process of assembling and welding automobile assembly parts, various parts need to be welded, especially for the welding of some automobile assembly parts, the welding angle needs to be considered. However, the prior art does not have a control for fine-tuning the welding angle of this part, which leads to errors in the welding process or failure to meet the requirements, thereby causing the failure of assembly welding;

[0003] Secondly, during the welding process, there is a situation where the angles of multiple assemblies need to be adjusted at the same time, that is, multiple assemblies are welded in a circular or linear arrangement, and angle welding is also required. This will undoubtedly increase the difficulty of welding. At the same time, it is also necessary to put forward requirements for the clamping and fixation of the required welded assemblies. It is necessary to flip these clamped assemblies at the same angle at the same time, and it is also necessary to ensure that the spacing between these multiple assembly parts is consistent to avoid the occurrence of different spacings between assemblies.

[0004] Therefore, we have designed a welding device and a welding method for automobile assembly parts. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of flipping the clamped assembly parts at a consistent angle, ensuring the consistent spacing between these multiple assembly parts, and avoiding the problem of different spacing between two assembly parts, and proposes an automobile assembly welding device and welding method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A welding device for automobile assembly parts includes a welding base plate and a flexible bending frame located above the welding base plate, wherein a plurality of welding rods welded to the top of the welding base plate are inserted into the flexible bending frame, a torsion spring is arranged in the flexible bending frame to drive the welding rods to disperse, and rotating blocks rotating on the side walls of the flexible bending frame are fixed at both ends of the torsion spring, a pulling belt driving the welding rod to flip is wound around the outer wall of the welding rod, a rotating slip ring driving the pulling belt to rotate is arranged on the top of the flexible bending frame, and a first compression spring and a second compression spring are symmetrically arranged on both sides of the welding rod to press against each other.

[0008] Preferably, the flexible bending frame is connected to the welding base plate through an external bracket, and a sliding hole is opened on the side wall of the flexible bending frame, and a plurality of sliders for distance measurement slide in the sliding hole, and a positioning rod assembly passing through the torsion spring is provided on the slider, and the positioning rod assembly passes through the torsion spring through the through hole.

[0009] Preferably, a sleeve is provided on the outer side wall of the welding rod, and a through groove is provided on the sleeve, and the pulling belt is wound around the outer side wall of the welding rod in a single circle and passes through both sides of the through groove.

[0010] Preferably, a rotating ring is provided on the outer side wall of the sleeve between the two ends of the pulling belt, one end of the first compression spring pushes the rotating ring through a push plate, and the other end of the first compression spring is provided with a moving block, and the moving block is connected to the slider.

[0011] Preferably, the positioning rod assembly comprises:

[0012] A first positioning rod and a second positioning rod, wherein the first positioning rod and the second positioning rod are coaxially arranged, the first positioning rod is fixed in the through hole, and two third positioning grooves and two first positioning grooves are respectively provided at the opposite ends of the first positioning rod and the second positioning rod, telescopic plates are slid in the two third positioning grooves, and the two telescopic plates are pushed into the first positioning grooves by the second compression spring.

[0013] Preferably, the positioning rod assembly further comprises:

[0014] Oil inlet, a rotating ball is fixed at one end of the second positioning rod away from the first positioning groove, a plurality of oil holes are opened in the rotating ball, and a push rod slides in the oil hole, and a non-slip rubber pad is provided at the end of the push rod, the oil inlet is connected with the plurality of oil holes, and a ball groove for the rotating ball to rotate is opened on the outer side wall of the rotating ring.

[0015] Preferably, one side of the two telescopic plates is provided with an inclined surface, the telescopic plate is provided with an end block on the side facing the second positioning rod, and the end block is not connected to the inclined surface, and the first positioning groove is provided with a second positioning groove adapted to the end block.

[0016] Preferably, the rotating slip ring moves on the top of the flexible bending frame through a movable slider and a top groove, the movable slider slides in a circle at the bottom of the rotating slip ring, the rotating slip ring slides in the top groove through a movable slider, the rotating slip ring has a transverse slider that slides symmetrically along the radial direction, a toggle block is provided on the transverse slider, and the two toggle blocks are connected to the two ends of the pulling belt through a toggle rod.

[0017] Preferably, the inclined surface faces the second positioning rod, and the toggle rod pushes the telescopic plate to retract into the third positioning slot.

[0018] A welding method for automobile assembly welding equipment, the specific operation steps are as follows:

[0019] S1: First, the flexible bending frame is connected to the welding substrate through an external bracket, wherein the shape of the flexible bending frame is changed accordingly according to the shape of the welding substrate, that is, the flexible bending frame is bent into a corresponding shape, so that a plurality of welding rods in the flexible bending frame are arranged on the top of the welding substrate, and then by rotating a rotating block on the side wall of the flexible bending frame, the number of torsion spring coils in the flexible bending frame changes with the torsion, and then the rotating block is fixed on the flexible bending frame through an external fixing mechanism;

[0020] S2: Since the number of turns of the torsion spring changes, and the positioning rod assembly penetrates the torsion spring through the through hole, it will also move with the positioning rod assembly. Due to the characteristics of the torsion spring, the distance between two adjacent positioning rod assemblies is a fixed value. Therefore, the distance between two adjacent welding rods is detected by changing the position of the slider in the sliding hole, that is, the torsion spring pitch is changed by twisting the rotating block, and finally the distance between the two adjacent welding rods on the top of the welding substrate is changed;

[0021] S3: During the torsion process of the torsion spring, the external oil pump injects oil into the oil inlet, and then drives the push rod in the oil hole to extend and press against the ball groove in the rotating ring to complete the positioning of the rotating ball and the rotating ring, that is, the welding rod moves together with the movement of the positioning rod assembly and the rotating slip ring moves on the top of the flexible bending frame through the moving slider and the top groove, and then after the movement is completed, the external oil pump is used to retract the push rod, that is, the push rod is retracted into the ball groove to release the positioning of the rotating ball on the rotating ring;

[0022] S4: Push the toggle block and slide the toggle rod radially on the rotating slip ring, that is, pull the two ends of the pulling belt away from each other. Since the single circle is wrapped around the outer wall of the welding rod, the originally vertical toggle rod will become inclined, that is, realize a flip of the toggle rod;

[0023] S5: When the toggle block brings the toggle rod over the positioning rod assembly, the toggle block will first press against one of the telescopic plates, then touch the inclined surface, squeeze and drive the telescopic plate to retract into the third positioning groove. When the toggle rod passes over one of the telescopic plates, the telescopic plate originally retracted into the third positioning groove re-extends and enters into the first positioning groove under the action of the second compression spring. Then the toggle rod squeezes another telescopic plate and repeats the above operation, thus completing the operation of the toggle rod passing over the positioning rod assembly. Since the end block is adapted to the second positioning groove, and under the pushing action of the first compression spring, the first positioning rod and the second positioning rod are disengagement rods with a fixed distance, and relative rotation will not occur.

[0024] Then, rotating the slip ring will rotate the pull belt and the sleeve together, completing the secondary flipping of the toggle rod, thereby completing the secondary flipping of the toggle rod, and then adjusting the angle change of multiple toggle rods on the top of the welding base plate, and then adjusting the external bracket again to make the toggle rod against the welding base plate to facilitate welding.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention adopts the characteristics of the torsion spring, so the distance between two adjacent positioning rod assemblies is a constant value. Therefore, the distance between two adjacent welding rods is detected by changing the position of the slider in the sliding hole, that is, by twisting the rotating block to drive the change of the torsion spring pitch, and finally changing the distance between the two adjacent welding rods on the top of the welding substrate.

[0027] 2. The present invention uses a push-to-pull block to drive the toggle rod to slide radially on the rotating slip ring, that is, to pull the two ends of the pulling belt away from each other. Since the single circle is wrapped around the outer wall of the welding rod, the originally vertical toggle rod will become inclined, that is, to achieve a flip of the toggle rod, and then rotate the rotating slip ring to rotate the pulling belt and the sleeve together, that is, to complete the secondary flip of the toggle rod, and finally achieve two flips of the toggle rod, thereby being able to adjust the angle change of multiple toggle rods on the top of the welding substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural schematic diagram of an automobile assembly welding device proposed by the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure enlargement at the center A;

[0030] Figure 3 A partial exploded view of an automobile assembly welding device proposed by the present invention;

[0031] Figure 4 This is a structural schematic diagram of a positioning rod assembly in an automobile assembly welding device proposed by the present invention;

[0032] Figure 5 It is a left and right isometric view of a positioning rod assembly in an automobile assembly welding device proposed by the present invention;

[0033] Figure 6 for Figure 5 A schematic diagram of the structure enlarged at B in the middle;

[0034] Figure 7 This is a schematic structural diagram of a vertical state of a welding rod in an automobile assembly welding device proposed by the present invention;

[0035] Figure 8This is a schematic structural diagram of the tilted state of a welding rod in an automobile assembly welding device proposed by the present invention;

[0036] Fig. 9 This is a schematic structural diagram of a welding rod in an automobile assembly welding device proposed by the present invention;

[0037] Fig.10 This is a schematic structural diagram of an initial vertical state of a welding rod in an automobile assembly welding device proposed by the present invention;

[0038] Fig.11 This is a schematic structural diagram of a welding rod in a first tilted state in an automobile assembly welding device proposed by the present invention;

[0039] Fig.12 The present invention provides a schematic structural diagram of a welding rod in a second tilted state in an automobile assembly welding device.

[0040] In the figure: 1, flexible bending frame; 2, welding base plate; 3, welding rod; 4, sliding hole; 5, rotating block; 6, torsion spring; 7, slider; 8, positioning rod assembly; 81, first positioning rod; 82, second positioning rod; 83, oil inlet; 9, top groove; 10, rotating slip ring; 11, horizontal slide plate; 12, toggle block; 13, toggle rod; 14, through hole; 15, rotating ball; 16, oil hole; 17, push rod; 18, telescopic plate; 19, inclined surface; 20, end block; 21, first positioning groove; 22, second positioning groove; 23, pulling belt; 24, sleeve; 25, through groove; 26, first compression spring; 27, push plate; 28, rotating ring; 29, ball groove; 30, third positioning groove. DETAILED DESCRIPTION

[0041] Reference Figure 1-Figure 12 A welding device for automobile assembly parts includes a welding base plate 2 and a flexible bending frame 1 located above the welding base plate 2. The flexible bending frame 1 is connected to the welding base plate 2 through an external bracket, and a sliding hole 4 is opened on the side wall of the flexible bending frame 1, and a plurality of sliders 7 for distance measurement slide in the sliding hole 4. The flexible bending frame 1 is connected to the welding base plate 2 through the external bracket, wherein the shape of the flexible bending frame 1 is changed accordingly according to the shape of the welding base plate 2, that is, the flexible bending frame 1 is bent into a corresponding shape, so that a plurality of welding rods 3 located in the flexible bending frame 1 are arranged on the top of the welding base plate 2.

[0042] The flexible bending frame 1 is provided with a torsion spring 6 for driving the welding rod 3 to disperse, and both ends of the torsion spring 6 are fixed with rotating blocks 5 that rotate on the side wall of the flexible bending frame 1. By rotating the rotating block 5 on the side wall of the flexible bending frame 1, the number of turns of the torsion spring 6 in the flexible bending frame 1 changes with the torsion, and then the rotating block 5 is fixed to the flexible bending frame 1 through an external fixing mechanism.

[0043] The slider 7 is provided with a positioning rod assembly 8 penetrating the torsion spring 6, Figure 4-Figure 6 State, the positioning rod assembly 8 passes through the torsion spring 6 through the through hole 14, the number of turns of the torsion spring 6 changes, and the positioning rod assembly 8 passes through the torsion spring 6 through the through hole 14, so it will also move with the positioning rod assembly 8. Due to the characteristics of the torsion spring 6, the distance between two adjacent positioning rod assemblies 8 is a constant value. Therefore, the distance between two adjacent welding rods 3 is detected by changing the position of the slider 7 in the slide hole 4, that is, by twisting the rotating block 5, the pitch of the torsion spring 6 is driven to change, and finally the distance between the two adjacent welding rods 3 on the top of the welding substrate 2 is changed.

[0044] A first compression spring 26 and a second compression spring are symmetrically arranged on both sides of the welding rod 3 to press against each other, so as to ensure that the welding rod 3 is always pressed against the positioning rod assembly 8 under the action of the first compression spring 26 .

[0045] The positioning rod assembly 8 includes a first positioning rod 81 and a second positioning rod 82. The first positioning rod 81 and the second positioning rod 82 are coaxially arranged. The first positioning rod 81 is fixed in the through hole 14, and the first positioning rod 81 and the second positioning rod 82 have two third positioning grooves 30 and two first positioning grooves 21 at the opposite ends respectively. Telescopic plates 18 are slid in the two third positioning grooves 30, and the two telescopic plates 18 are pushed into the first positioning grooves 21 by the second compression spring.

[0046] The positioning rod assembly 8 also includes an oil inlet 83, and a rotating ball 15 is fixed at one end of the second positioning rod 82 away from the first positioning groove 21. A plurality of oil holes 16 are provided in the rotating ball 15, and a push rod 17 slides in the oil hole 16, and an anti-slip rubber pad is provided at the end of the push rod 17. The oil inlet 83 is connected with the plurality of oil holes 16, and a ball groove 29 for rotating the rotating ball 15 is provided on the outer wall of the rotating ring 28. During the torsion process of the torsion spring 6, an external oil pump is injected with oil into the oil inlet 83, and then the push rod 17 in the oil hole 16 is driven to extend and press against the ball groove 29 in the rotating ring 28 to complete the positioning of the rotating ball 15 and the rotating ring 28, that is, when the positioning rod assembly 8 moves, the welding rod 3 is moved together and the rotating slip ring 10 is moved on the top of the flexible bending frame 1 through the moving slider and the top groove 9, and then after the movement is completed, it is retracted by the external oil pump, that is, the push rod 17 is retracted into the ball groove 29 to release the positioning of the rotating ring 28 by the rotating ball 15.

[0047] One side of the two telescopic plates 18 is provided with an inclined surface 19, the inclined surface 19 faces the second positioning rod 82, and the toggle rod 13 pushes the telescopic plate 18 to retract into the third positioning groove 30, and the telescopic plate 18 is provided with an end block 20 on the side facing the second positioning rod 82, and the end block 20 is not connected to the inclined surface 19, and the first positioning groove 21 is provided with a second positioning groove 22 adapted to the end block 20;

[0048] When the toggle block 12 leads the toggle rod 13 to pass over the positioning rod assembly 8, the toggle block 12 will first press against one of the telescopic plates 18, then touch the inclined surface 19, squeeze and drive the telescopic plate 18 to retract into the third positioning groove 30, and when the toggle rod 13 passes over one of the telescopic plates 18, the telescopic plate 18 originally retracted into the third positioning groove 30 is re-extended and enters the first positioning groove 21 under the action of the second compression spring, and then the toggle rod 13 squeezes the other telescopic plate 18 to repeat the above operation, that is, the operation of the toggle rod 13 passing over the positioning rod assembly 8 is completed;

[0049] Since the end block 20 is matched with the second positioning groove 22 and under the pushing action of the first compression spring 26, the first positioning rod 81 and the second positioning rod 82 are disengagement rods with a fixed distance and will not rotate relative to each other.

[0050] The flexible bending frame 1 is provided with a plurality of welding rods 3 welded to the top of the welding base plate 2. The outer wall of the welding rod 3 is sleeved with a sleeve 24, and a through groove 25 is opened on the sleeve 24. The pulling belt 23 is wrapped around the outer wall of the welding rod 3 in a single circle and passes through both sides of the through groove 25, which pushes the toggle block 12 to slide radially on the rotating slip ring 10 with the toggle rod 13, that is, the two ends of the pulling belt 23 are pulled back and forth. Since the single circle is wrapped around the outer wall of the welding rod 3, the originally vertical toggle rod 13 will become inclined, that is, a flip of the toggle rod 13 is achieved.

[0051] A pulling belt 23 is wound around the outer wall of the welding rod 3 to drive the welding rod 3 to flip. A rotating slip ring 10 is provided on the top of the flexible bending frame 1 to drive the pulling belt 23 to rotate. A rotating ring 28 is provided on the outer wall of the sleeve 24 between the two ends of the pulling belt 23. One end of the first compression spring 26 pushes the rotating ring 28 through the push plate 27. A moving block is provided at the other end of the first compression spring 26, and the moving block is connected to the slider 7. Under the pushing action of the first compression spring 26, the first positioning rod 81 and the second positioning rod 82 are disengagement rods with a fixed distance, and no relative rotation will occur.

[0052] The rotating slip ring 10 moves on the top of the flexible bending frame 1 through the moving slider and the top groove 9, and the moving slider slides in a circle at the bottom of the rotating slip ring 10. The rotating slip ring 10 slides in the top groove 9 through the moving slider. The rotating slip ring 10 slides symmetrically along the radial direction with a transverse slide 11, and a toggle block 12 is provided on the transverse slide 11. The two toggle blocks 12 are connected to the two ends of the pulling belt 23 through a toggle rod 13. Rotating the rotating slip ring 10 will rotate the pulling belt 23 with the sleeve 24, that is, completing the secondary flipping of the toggle rod 13, thereby completing the double flipping of the toggle rod 13, and then being able to adjust the angle change of multiple toggle rods 13 at the top of the welding substrate 2, and then adjusting the external bracket again to make the toggle rod 13 against the welding substrate 2 for easy welding.

[0053] The working principle of the present invention is as follows:

[0054] S1: First, the flexible bending frame 1 is connected to the welding substrate 2 through an external bracket, wherein the shape of the flexible bending frame 1 is changed accordingly according to the shape of the welding substrate 2, that is, the flexible bending frame 1 is bent into a corresponding shape, so that a plurality of welding rods 3 in the flexible bending frame 1 are arranged on the top of the welding substrate 2, and then the rotating block 5 on the side wall of the flexible bending frame 1 is rotated so that the number of turns of the torsion spring 6 in the flexible bending frame 1 changes with the torsion, and then the rotating block 5 is fixed on the flexible bending frame 1 through an external fixing mechanism;

[0055] S2: Since the number of turns of the torsion spring 6 changes, and the positioning rod assembly 8 penetrates the torsion spring 6 through the through hole 14, it will also move with the positioning rod assembly 8. Due to the characteristics of the torsion spring 6, the distance between two adjacent positioning rod assemblies 8 is a constant value. Therefore, the distance between two adjacent welding rods 3 is detected by changing the position of the slider 7 in the slide hole 4, that is, the pitch of the torsion spring 6 is changed by twisting the rotating block 5, and finally the distance between the two adjacent welding rods 3 on the top of the welding substrate 2 is changed;

[0056] S3: During the torsion process of the torsion spring 6, the external oil pump injects oil into the oil inlet 83, and then drives the push rod 17 in the oil hole 16 to extend and press against the ball groove 29 in the rotating ring 28, so as to complete the positioning of the rotating ball 15 and the rotating ring 28, that is, the welding rod 3 is moved together with the movement of the positioning rod assembly 8, and the rotating slip ring 10 is moved on the top of the flexible bending frame 1 through the moving slider and the top groove 9, and then after the movement is completed, the external oil pump is used to retract the oil, that is, the push rod 17 is retracted into the ball groove 29 to release the positioning of the rotating ball 15 on the rotating ring 28;

[0057] S4: Push the toggle block 12 to slide the toggle rod 13 radially on the rotating slip ring 10, that is, pull the two ends of the pulling belt 23 away from each other. Since the single circle is wrapped around the outer wall of the welding rod 3, the originally vertical toggle rod 13 will become inclined, that is, the toggle rod 13 is flipped once;

[0058] S5: In the process of the toggle block 12 leading the toggle rod 13 over the positioning rod assembly 8, the toggle block 12 will first press against one of the telescopic plates 18, and then touch the inclined surface 19, squeezing and driving the telescopic plate 18 to retract into the third positioning groove 30. When the toggle rod 13 passes over one of the telescopic plates 18, the telescopic plate 18 originally retracted into the third positioning groove 30 is re-extended and enters into the first positioning groove 21 under the action of the second compression spring, and then the toggle rod 13 squeezes the other telescopic plate 18 to repeat the above operation, that is, the operation of the toggle rod 13 passing over the positioning rod assembly 8 is completed. Since the end block 20 is adapted to the second positioning groove 22, and at the same time, under the pushing action of the first compression spring 26, the first positioning rod 81 and the second positioning rod 82 are disengagement rods with a fixed distance, and will not rotate relative to each other.

[0059] Then, the rotating slip ring 10 will rotate the pulling belt 23 and the sleeve 24 together, completing the secondary flipping of the toggle rod 13, thereby completing the double flipping of the toggle rod 13, and then adjusting the angle change of multiple toggle rods 13 on the top of the welding substrate 2, and then adjusting the external bracket again to make the toggle rod 13 against the welding substrate 2 for easy welding.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automobile assembly welding device, comprising a welding substrate (2), and a flexible bending frame (1) located above the welding substrate (2), characterized in that: The flexible bending frame (1) is provided with a plurality of welding rods (3) welded to the top of the welding substrate (2), the flexible bending frame (1) is provided with a torsion spring (6) for driving the welding rods (3) to disperse, and a rotating block (5) for rotating on the side wall of the flexible bending frame (1) is fixed at both ends of the torsion spring (6), the outer wall of the welding rod (3) is wrapped with a pulling belt (23) for driving the welding rod (3) to flip, the top of the flexible bending frame (1) is provided with a rotating slip ring (10) for driving the pulling belt (23) to rotate, and the two sides of the welding rod (3) are symmetrically provided with a first compression spring (26) and a second compression spring that are pressed against each other.

2. The automobile assembly welding equipment according to claim 1, characterized in that: The flexible bending frame (1) is connected to the welding base plate (2) via an external bracket, and a sliding hole (4) is provided on the side wall of the flexible bending frame (1), and a plurality of sliders (7) for distance measurement slide in the sliding hole (4), and a positioning rod assembly (8) penetrating the torsion spring (6) is provided on the slider (7), and the positioning rod assembly (8) penetrates the torsion spring (6) via a through hole (14).

3. The automobile assembly welding equipment according to claim 2, characterized in that: The outer wall of the welding rod (3) is sleeved with a sleeve (24), and a through groove (25) is provided on the sleeve (24). The pulling belt (23) is wound around the outer wall of the welding rod (3) in a single circle and passes through both sides of the through groove (25).

4. The automobile assembly welding equipment according to claim 3, characterized in that: A rotating ring (28) is provided on the outer side wall of the sleeve (24) between the two ends of the pulling belt (23); one end of the first compression spring (26) pushes the rotating ring (28) through a push plate (27); a moving block is provided at the other end of the first compression spring (26), and the moving block is connected to the slider (7).

5. The automobile assembly welding equipment according to claim 4, characterized in that: The positioning rod assembly (8) comprises: A first positioning rod (81) and a second positioning rod (82), wherein the first positioning rod (81) and the second positioning rod (82) are coaxially arranged, the first positioning rod (81) is fixed in the through hole (14), and two third positioning grooves (30) and two first positioning grooves (21) are respectively provided at the opposite ends of the first positioning rod (81) and the second positioning rod (82), and telescopic plates (18) are slidably arranged in the two third positioning grooves (30), and the two telescopic plates (18) are pushed into the first positioning grooves (21) by the second compression spring.

6. The automobile assembly welding equipment according to claim 5, characterized in that: The positioning rod assembly (8) also includes: An oil inlet (83), a rotating ball (15) is fixed to one end of the second positioning rod (82) away from the first positioning groove (21), a plurality of oil holes (16) are provided in the rotating ball (15), a push rod (17) slides in the oil hole (16), and a non-slip rubber pad is provided at the end of the push rod (17), the oil inlet (83) is connected to the plurality of oil holes (16), and a ball groove (29) for the rotating ball (15) to rotate is provided on the outer wall of the rotating ring (28).

7. The automobile assembly welding equipment according to claim 6, characterized in that: One side of the two telescopic plates (18) is provided with an inclined surface (19); the telescopic plate (18) is provided with an end block (20) on the side facing the second positioning rod (82), and the end block (20) is not connected to the inclined surface (19); and the first positioning groove (21) is provided with a second positioning groove (22) adapted to the end block (20).

8. The automobile assembly welding equipment according to claim 7, characterized in that: The rotating slip ring (10) moves on the top of the flexible bending frame (1) through a movable slider and a top groove (9); the movable slider slides in a circle at the bottom of the rotating slip ring (10); the rotating slip ring (10) slides in the top groove (9) through the movable slider; the rotating slip ring (10) has a transverse slide plate (11) that slides symmetrically along the radial direction; a toggle block (12) is provided on the transverse slide plate (11), and the two toggle blocks (12) are connected to the two ends of the pulling belt (23) through a toggle rod (13).

9. The automobile assembly welding equipment according to claim 8, characterized in that: The inclined surface (19) faces the second positioning rod (82), and the toggle rod (13) pushes the telescopic plate (18) to retract into the third positioning groove (30).

10. A welding method for automobile assembly welding equipment, using the automobile assembly welding equipment according to claim 9, characterized in that: The specific steps are as follows: S1: First, a flexible bending frame (1) is connected to a welding substrate (2) through an external bracket, wherein the shape of the flexible bending frame (1) is changed accordingly according to the shape of the welding substrate (2), that is, the flexible bending frame (1) is bent into a corresponding shape, so that a plurality of welding rods (3) in the flexible bending frame (1) are arranged on the top of the welding substrate (2), and then a rotating block (5) on the side wall of the flexible bending frame (1) is rotated so that the number of turns of the torsion spring (6) in the flexible bending frame (1) changes with the torsion, and then the rotating block (5) is fixed to the flexible bending frame (1) through an external fixing mechanism; S2: Since the number of turns of the torsion spring (6) changes, and the positioning rod assembly (8) penetrates the torsion spring (6) through the through hole (14), it will also move with the positioning rod assembly (8). Due to the characteristics of the torsion spring (6), the distance between two adjacent positioning rod assemblies (8) is a constant value. Therefore, the distance between two adjacent welding rods (3) is detected by changing the position of the slider (7) in the slide hole (4), that is, by twisting the rotating block (5), the pitch of the torsion spring (6) is driven to change, and finally the distance between the two adjacent welding rods (3) on the top of the welding substrate (2) is changed; S3: During the torsion of the torsion spring (6), the external oil pump injects oil into the oil inlet (83), and then drives the push rod (17) in the oil hole (16) to extend and press against the ball groove (29) in the rotating ring (28), thereby completing the positioning of the rotating ball (15) and the rotating ring (28), that is, the welding rod (3) is moved together with the movement of the positioning rod assembly (8), and the rotating slip ring (10) is moved on the top of the flexible bending frame (1) through the moving slider and the top groove (9), and then after the movement is completed, the external oil pump is used to retract the oil, that is, the push rod (17) is retracted into the ball groove (29) to release the positioning of the rotating ball (15) on the rotating ring (28); S4: Push the toggle block (12) and the toggle rod (13) to slide radially on the rotating slip ring (10), that is, pull the two ends of the pulling belt (23) away from each other. Since the single circle is wound around the outer wall of the welding rod (3), the originally vertical toggle rod (13) will become inclined, that is, realize a flip of the toggle rod (13); S5: In the process of the toggle block (12) leading the toggle rod (13) over the positioning rod assembly (8), the toggle block (12) will first press against one of the telescopic plates (18), then touch the inclined surface (19), squeeze and drive the telescopic plate (18) to retract into the third positioning groove (30). When the toggle rod (13) passes over one of the telescopic plates (18), the telescopic plate (18) originally retracted into the third positioning groove (30) is re-extended and enters into the first positioning groove (21) under the action of the second compression spring. Then the toggle rod (13) squeezes the other telescopic plate (18) to repeat the above operation, thus completing the operation of the toggle rod (13) passing over the positioning rod assembly (8). Since the end block (20) is adapted to the second positioning groove (22), and under the pushing action of the first compression spring (26), the first positioning rod (81) and the second positioning rod (82) are disengagement rods with a fixed distance, and will not rotate relative to each other. Then, the rotating slip ring (10) is rotated, and the pulling belt (23) and the sleeve (24) are rotated together, completing the secondary flipping of the toggle rod (13), thereby completing the double flipping of the toggle rod (13), and then adjusting the angle change of multiple toggle rods (13) on the top of the welding base plate (2), and then adjusting the external bracket again to make the toggle rod (13) and the welding base plate (2) abut against each other, so as to facilitate welding.

Images