Fine adjustment mechanism and fine adjustment method thereof, and welding device

Abstract

This invention provides a fine-tuning mechanism and method, as well as a welding apparatus, including a fixed plate and X-axis, Z-axis, and Y-axis fine-tuning mechanisms. Through a multi-point installed fine-tuning structure, this invention can individually adjust the position of a single welding nozzle in the X and Y directions, or simultaneously adjust the position of two welding nozzles in the X direction. Alternatively, using the left welding nozzle as a reference, the position of the right welding nozzle can be adjusted independently in the X, Z, and Y directions, enabling precise fine-tuning of the welding nozzle positions and improving welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a fine-tuning mechanism and its fine-tuning method, and a welding apparatus. Background Technology

[0002] Currently, the micro-adjustment of welding nozzles in droplet welding clamps is mostly achieved through manual adjustment using a round rod and a fixed block. For example, the YN204545769U provides a nozzle linkage micro-adjustment mechanism, including at least two welding nozzles, each fixed by a nozzle clamp. Each nozzle clamp is connected to a rotating mechanism and a lifting mechanism. The rotating mechanism includes a swing arm and a rotating pin, while the lifting mechanism includes a crossbar, a guide bar, a first slider, and a linear bearing. The guide bar is perpendicular to the crossbar, and one end of the crossbar is fixed to the outer ring of the linear bearing. The other end of the swing arm is slidably connected to the crossbar via the first slider, and the guide bar engages with the inner ring of the linear bearing. This adjustment structure is inconvenient, cannot achieve fine-tuning of the nozzle position, and the adjustment process is cumbersome, making installation and maintenance difficult.

[0003] If the horizontal direction is set as the X direction, the vertical direction as the Z direction, and the direction perpendicular to the plane formed by the X and Z directions as the Y direction, the above-mentioned fine-tuning mechanism can adjust the position of the welding nozzle in the X and Z directions. However, in the X direction, the two welding nozzles move in tandem and the position of the welding nozzle cannot be adjusted independently in the X direction.

[0004] Traditional clamping welding fine-tuning mechanisms without welding nozzles, whether single-action or double-action, may result in welding defects when welding certain products. Therefore, it is necessary to optimize and improve the existing droplet welding fine-tuning mechanisms to address this issue. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the shortcomings of the prior art, the present invention provides a fine-tuning mechanism and fine-tuning method with reasonable structural design, simple welding nozzle adjustment method, convenient installation and maintenance, and capable of realizing individual adjustment of a single welding nozzle and synchronous linkage of multiple welding nozzles.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: a fine-tuning mechanism, including a fixed base plate, on which a left opening block and a right opening block are connected in the X direction. The left opening block is provided with a left welding nozzle, and the right opening block is provided with a right welding nozzle. The left opening block is tunably connected to a left welding nozzle connecting frame through an X-direction fine-tuning mechanism. The left welding nozzle connecting frame is tunably connected to a left welding nozzle connecting block through a Y-direction fine-tuning mechanism. The left welding nozzle is disposed within the left welding nozzle connecting block. The right opening block is fixed with a Z-direction fine-tuning mechanism that can move in the Z direction. The Z-direction fine-tuning mechanism is provided with an X-direction fine-tuning mechanism. The right welding nozzle connecting frame is tunably connected to the X-direction fine-tuning mechanism. The right welding nozzle connecting frame is tunably connected to the right welding nozzle connecting block through a Y-direction fine-tuning mechanism. The right welding nozzle is tunably disposed within the right welding nozzle connecting block.

[0007] To facilitate fine-tuning in the X direction, each X-axis fine-tuning mechanism includes an X-axis fixing block, an X-axis slider, an X-axis fixing slide rod, and an X-axis adjusting screw, all arranged parallel to each other along the X direction. The X-axis fixing blocks are fixed to the corresponding opening and closing blocks. One end of the X-axis fixing slide rod is inserted into the X-axis fixing block, and the other end slides with the X-axis slider. One end of the X-axis adjusting screw abuts against the X-axis fixing block, and the other end is threadedly connected to the X-axis slider.

[0008] Preferably, in order to effectively lock the welding nozzle connecting frame on this side to the opening and closing block after X-axis fine-tuning, the X-axis fine-tuning mechanism further includes an X-axis slide rail, which is fixed on the corresponding opening and closing block and parallel to the X-axis fixed slide rod on the opening and closing block on this side; the X-axis slide rail has a groove parallel to the direction of the X-axis fixed slide rod, and the X-axis slider has a protrusion with a boss that cooperates with the groove.

[0009] To improve the fit between the boss and the slide groove, effectively reduce the clearance, and enhance the fit, the boss can be effectively pressed into the slide groove by the elastic deformation of the boss and the set screw. The X-axis slider is also provided with a fixing strip above the boss. There is a gap between the fixing strip and the boss. Several set screws are threaded on the fixing strip. The ends of the screws point towards the slide groove and tighten the boss and the slide groove together.

[0010] By effectively utilizing the thickness difference between the connection point of the boss and the X-axis slider, the locking effect of the boss and the slide groove can be further improved. The gap cross-section is L-shaped with the opening facing downwards, meaning that the thickness of the position where the boss mates with the slide groove is greater than the thickness of the position where the boss connects with the X-axis slider.

[0011] To adjust the height of the right welding nozzle relative to the left welding nozzle in the Z-direction, the Z-direction fine-tuning mechanism includes a Z-direction slide rail, a Z-direction adjusting screw, and a Z-direction positioning rod arranged parallel to the Z-direction. The Z-direction slide rail is fixed to the right opening and closing block in the Z-direction. The X-direction fine-tuning mechanism corresponding to the right opening and closing block is slidably connected to the Z-direction slide rail. One end of the Z-direction adjusting screw is inserted and limited inside the right opening and closing block, and the other end is threadedly engaged with the X-direction fine-tuning mechanism corresponding to the right opening and closing block. The Z-direction positioning rod is slidably limited to the X-direction fine-tuning mechanism.

[0012] The adjustment of the left and right welding nozzles relative to the fixed base plate in the front-to-back direction, i.e., in the Y-direction, is achieved through a Y-direction fine-tuning mechanism. The Y-direction fine-tuning mechanism includes a Y-direction slide rail, a Y-direction limiting slide rod, and a Y-direction adjusting screw, which are respectively arranged parallel to each other along the Y-direction. The Y-direction slide rail is fixed on the welding nozzle connecting frame on the corresponding side. The welding nozzle connecting block is slidably connected to the Y-direction slide rail along the Y-direction. One end of the Y-direction limiting slide rod is guided and inserted into the welding nozzle connecting frame, and the other end is slidably engaged with the welding nozzle connecting block. The Y-direction adjusting screw is threaded into the welding nozzle connecting block, and its end abuts against the welding nozzle connecting frame.

[0013] Preferably, while the left welding nozzle is fixed on the left welding nozzle connecting block, the right welding nozzle and the right welding nozzle connecting block are adjustable, that is, the right welding nozzle is adjustablely connected to the right welding nozzle connecting block through a universal ball joint.

[0014] A fine-tuning method for a fine-tuning mechanism, wherein the fine-tuning mechanism described above is used to adjust the position of the left welding nozzle through the X-axis fine-tuning mechanism and the Y-axis fine-tuning mechanism; after the position of the left welding nozzle is fixed, the position of the right welding nozzle is adjusted by the X-axis fine-tuning mechanism, the Z-axis fine-tuning mechanism and the Y-axis fine-tuning mechanism respectively, with the left welding nozzle as the standard, and the right welding nozzle is fixed after the adjustment is in place.

[0015] A welding apparatus comprising the aforementioned fine-tuning mechanism.

[0016] The beneficial effects of this invention are that the fine-tuning mechanism, fine-tuning method, and welding device provided by this invention have a reasonable structural design. Through the multi-point installation fine-tuning structure, a single welding nozzle can be driven to make individual position adjustments in the X and Y directions, or two welding nozzles can be adjusted simultaneously in the X direction. Alternatively, the position of the right welding nozzle in the X, Z, and Y directions can be adjusted independently with the left welding nozzle as a reference, allowing for precise fine-tuning of the welding nozzle position and facilitating improved welding quality. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a perspective view of the preferred embodiment of the present invention.

[0019] Figure 2 This is the front view of the preferred embodiment of the present invention.

[0020] Figure 3 This is a side view of the preferred embodiment of the present invention.

[0021] Figure 4 yes Figure 3 Sectional view of AA.

[0022] Figure 5 yes Figure 3 A cross-sectional view of BB.

[0023] Figure 6 yes Figure 3 Enlarged diagram of point C in the middle.

[0024] Figure 7 This is a perspective view of the X-direction fine-tuning mechanism at the left opening and closing block in the optimal embodiment of the present invention.

[0025] Figure 8 This is a perspective view of the X-axis fine-tuning mechanism and the Z-axis fine-tuning mechanism at the right-side opening and closing block in the optimal embodiment of the present invention.

[0026] In the diagram: 1. Fixed base plate; 2. Left welding nozzle; 3. Right welding nozzle; 4. Left opening and closing block; 5. Right opening and closing block; 6. Universal ball joint; 7. Left welding nozzle connecting frame; 8. Left welding nozzle connecting block; 9. Right welding nozzle connecting frame; 10. Right welding nozzle connecting block; 11. X-direction adjusting screw; 12. X-direction fixing slide bar; 13. X-direction fixing block; 14. X-direction slider; 15. X-direction slide rail; 16. Boss; 17. Gap; 18. Fixing strip; 19. Set screw; 20. Z-direction adjusting screw; 21. Z-direction slide rail; 22. Y-direction adjusting screw; 23. Y-direction limiting slide bar; 24. Y-direction slide rail; 25. Z-direction positioning rod. Detailed Implementation

[0027] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and the orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be limiting, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0028] like Figure 1 , Figure 2 and Figure 4The fine-tuning mechanism shown is the preferred embodiment of the present invention, including a fixed base plate 1. A left opening / closing block 4 and a right opening / closing block 5 are connected to the fixed base plate 1 along the X direction. The left opening / closing block 4 and the right opening / closing block 5 are separated by an opening / closing power mechanism. A tension spring is also elastically connected between the left opening / closing block 4 and the right opening / closing block 5, and the tension spring is used to close the two opening / closing blocks.

[0029] The left opening and closing block 4 is adjustablely connected to the left welding nozzle connecting frame 7 via the X-axis fine adjustment mechanism. The left welding nozzle connecting frame 7 is adjustablely connected to the left welding nozzle connecting block 8 via the Y-axis fine adjustment mechanism. The left welding nozzle connecting block 8 contains the left welding nozzle 2.

[0030] like Figure 5 and Figure 7 As shown, the X-axis fine-tuning mechanism on the left includes an X-axis fixing block 13, an X-axis slider 14, an X-axis fixing slide rod 12, and an X-axis adjusting screw 11, all arranged parallel to each other along the X-axis. The X-axis fixing block 13 is fixed to the left opening and closing block 4. One end of the X-axis fixing slide rod 12 is inserted into the X-axis fixing block 13, and the other end slides with the X-axis slider 14. The X-axis fixing slide rod 12 serves to position and guide the X-axis slider in the X-axis direction. One end of the X-axis adjusting screw 11 abuts against the X-axis fixing block 13, and the other end is threaded to the X-axis slider 14. The adjustment of the left welding nozzle 2 in the X-axis direction is achieved by rotating the X-axis adjusting screw 11, which causes the X-axis slider 14 to translate relative to the X-axis fixing block 13 in the X-axis direction. In this structure, since the left opening and closing block 4 does not involve adjustment in the Z direction, the X-direction fixing block 13 on the left opening and closing block 4 is connected and fixed to the left welding nozzle connecting frame 7 by screws, and moves synchronously relative to the X-direction fixing slide bar 12 under the action of the X-direction adjusting screw 11.

[0031] like Figure 6As shown, in order to effectively lock the left welding nozzle connecting frame 7 and the left opening and closing block 4 after X-axis fine adjustment, the X-axis fine adjustment mechanism also includes an X-axis slide rail 15. The X-axis slide rail 15 is fixed on the corresponding opening and closing block and parallel to the X-axis fixed slide rod 12 on that side of the opening and closing block. The X-axis slide rail 15 has a groove parallel to the direction of the X-axis fixed slide rod 12. The X-axis slider 14 has a protruding boss 16 that mates with the groove. A fixing strip 18 is also provided above the boss 16 on the X-axis slider 14. There is a gap 17 between the fixing strip 18 and the boss 16. The gap 17 has an L-shaped cross-section with the opening facing downwards, that is, the thickness of the boss 16 at the position where it mates with the groove is greater than the thickness of the position where the boss 16 is connected to the X-axis slider 14. Several set screws 19 are threaded onto the fixing strip 18. The ends of the screws point towards the groove and tighten the boss 16 and the groove. By effectively utilizing the thickness difference between the connection position of the boss 16 and the X-axis slider 14, and tightening the set screw 19, the boss 16 undergoes elastic deformation, effectively reducing the mating clearance 17 and improving the fit between the boss 16 and the slide groove. The left welding nozzle connecting frame 7, the boss 16, and the fixing strip 18 are integrated into one structure. By tightening the set screw 19, the left welding nozzle connecting frame 7 and the left opening and closing block 4 are finally positioned and fixed after adjustment.

[0032] The adjustment of the left welding nozzle 2 relative to the fixed base plate 1 in the front-to-back direction, i.e., the Y-axis, is achieved through a Y-axis fine-tuning mechanism. This mechanism includes a Y-axis slide rail 24, a Y-axis limiting slide rod 23, and a Y-axis adjusting screw 22, all parallel to each other along the Y-axis. The Y-axis slide rail 24 is fixed to the left welding nozzle connecting frame 7. The welding nozzle connecting block is slidably connected to the Y-axis slide rail 24 along the Y-axis. One end of the Y-axis limiting slide rod 23 is guided and inserted into the welding nozzle connecting frame, while the other end slides against the welding nozzle connecting block, thus providing positioning and guidance for the welding nozzle connecting block in the Y-axis direction. The Y-axis adjusting screw 22 is threaded into the welding nozzle connecting block, with its end abutting against the welding nozzle connecting frame. The positioning adjustment of the left welding nozzle 2 in the Y-axis direction is achieved by rotating the Y-axis adjusting screw 22, which causes the welding nozzle connecting block to move relative to the welding nozzle connecting frame along the Y-axis guide rail.

[0033] like Figure 5 and Figure 8 As shown, the right-side opening / closing block 5 is equipped with a Z-axis fine-tuning mechanism, which in turn has an X-axis fine-tuning mechanism. The right welding nozzle 3 is connected to the X-axis fine-tuning mechanism on this side via the right-side welding nozzle connector 9. The X-axis fine-tuning mechanism on the right-side opening / closing block 5 operates on the same principle as the X-axis fine-tuning mechanism on the left-side opening / closing block 4. That is... Figure 7 As shown, the X-axis fine-tuning mechanism of the opening and closing block 5 on the right also includes an X-axis fixing block 13, an X-axis slider 14, an X-axis fixing slide rod 12 and an X-axis adjusting screw 11 arranged parallel to each other along the X-axis. By rotating the X-axis adjusting screw 11, the X-axis slider 14 is driven to translate in the X-axis.

[0034] like Figure 8 As shown, the X-axis slider 14 located on the right side can also be finely adjusted in the Z-axis direction. Specifically, the Z-axis fine-tuning mechanism of the right welding nozzle 3 is as follows:

[0035] The Z-axis fine-tuning mechanism includes a Z-axis slide rail 21, a Z-axis adjusting screw 20, and a Z-axis positioning rod 25, all arranged parallel to the Z-axis. The Z-axis slide rail 21 is fixed along the Z-axis to the right-side opening block 5. The X-axis slider 14 of the X-axis fine-tuning mechanism on this side is slidably connected to the Z-axis slide rail 21, driving the entire X-axis fine-tuning mechanism to move along the Z-axis. The Z-axis slide rail 21 provides basic limiting guidance for the movement of the X-axis slider 14. In this structure, one end of the Z-axis adjusting screw 20 is inserted and limited within the right-side opening block 5 along the Z-axis, and this end is fixed in the Z-direction position. The other end is threadedly connected to the X-axis slider 14. Rotating the Z-axis adjusting screw allows the X-axis slider 14 to move along the Z-axis. One end of the Z-axis positioning rod 25 is an optical axis, which is inserted and limited to the X-axis slider 14. The other end is fixed in the Z-direction position on the right-side opening block 5, providing further limiting guidance for the movement of the X-axis slider 14 on this side.

[0036] The right welding nozzle connecting bracket 9 on the right opening and closing block 5 is adjustablely connected to the right welding nozzle connecting block 10 via a Y-axis fine-tuning mechanism, and the right welding nozzle 3 is adjustablely positioned within the right welding nozzle connecting block 10. Figure 1 As shown, in actual design, the left welding nozzle 2 is usually directly fixed to the left welding nozzle connecting block 8, while the right welding nozzle 3 is adjustablely connected to the right welding nozzle connecting block 10 through the universal ball head 6, which facilitates fine adjustment relative to the left welding nozzle 2 as needed.

[0037] Using the above-mentioned fine-tuning mechanism, the position of the left welding nozzle 2 is adjusted by the X-axis fine-tuning mechanism and the Y-axis fine-tuning mechanism; after the position of the left welding nozzle 2 is fixed, the position of the right welding nozzle 3 is adjusted by the X-axis fine-tuning mechanism, the Z-axis fine-tuning mechanism and the Y-axis fine-tuning mechanism, respectively, with the left welding nozzle 2 as the standard, and the right welding nozzle 3 is fixed after being adjusted to the correct position.

[0038] Specifically, during welding, the feeding mechanism is lowered to the set position, with the discharge port as the center position, and the left and right welding nozzles 3 are adjusted. At this time, it is necessary to ensure that the vertical contact surfaces of the welding nozzles are in contact, and tighten all the screws on the fine-tuning mechanism.

[0039] If it is found that the welding nozzle is vertically aligned but the discharge port is not in the center position, the overall X-direction adjustment is made by using the fine adjustment mechanism on the left or right side to adjust the center position of the left welding nozzle 2 and the right welding nozzle 3. After adjustment, manually align the mating surfaces of the left and right welding nozzles 3 to see if they are in the center. After confirming that they are in the center, tighten the screws of the fine adjustment mechanism.

[0040] If it is found that the Y-direction of the discharge port is not centered between the left and right welding nozzles 3, and there is a deviation, loosen the screw of the Y-direction fine-tuning mechanism on the left opening and closing block 4 for the left welding nozzle 2, and adjust the Y-direction position of the left welding nozzle 2. After adjustment, using the left welding nozzle 2 as a reference, adjust the position of the right welding nozzle 3 accordingly. At this time, for the Y-direction position adjustment of the right welding nozzle 3, the rotation range of the screw of the Y-direction fine-tuning mechanism on the right opening and closing block 5 can be determined according to the rotation range of the screw of the Y-direction fine-tuning mechanism on the left opening and closing block 4. Generally, the amount by which the screw of the left Y-direction fine-tuning mechanism is loosened corresponds to the amount by which the screw of the right Y-direction fine-tuning mechanism is tightened, thereby driving the left welding nozzle 2 and the right welding nozzle 3 to adjust their displacement in the Y-direction synchronously.

[0041] If a height difference in the Z direction is found between the left welding nozzle 2 and the right welding nozzle 3, the Z direction height of the right welding nozzle 3 can be adjusted by adjusting the Z direction positioning rod through the Z direction fine adjustment mechanism on the right opening and closing block 5 to ensure that the left welding nozzle 2 and the right welding nozzle 3 are at the same height.

[0042] In addition, when the left welding nozzle 2 and the right welding nozzle 3 are separated, the right welding nozzle 3 can be independently adjusted in position through the X-axis fine adjustment mechanism, the Y-axis fine adjustment mechanism and the Z-axis fine adjustment mechanism, the universal ball head 6, etc., to realize the single-action adjustment operation at the single welding nozzle.

[0043] Based on the above embodiments, the present invention can also provide a welding apparatus that includes the above-described fine-tuning mechanism.

[0044] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fine-tuning method for a fine-tuning mechanism, wherein the fine-tuning mechanism includes a fixed base plate (1), and a left opening block (4) and a right opening block (5) are connected to the fixed base plate (1) along the X direction. The left opening block (4) is provided with a left welding nozzle (2), and the right opening block (5) is provided with a right welding nozzle (3). The left opening block (4) is adjustablely connected to a left welding nozzle connecting frame (7) through an X-direction fine-tuning mechanism, and the left welding nozzle connecting frame (7) is adjustablely connected to a left welding nozzle connecting block (8) through a Y-direction fine-tuning mechanism. The left welding nozzle (2) is located inside the left welding nozzle connecting block (8); the right opening and closing block (5) is fixed with a Z-axis fine-tuning mechanism that can move in the Z direction, and the Z-axis fine-tuning mechanism is provided with an X-axis fine-tuning mechanism, which is tunably connected to the right welding nozzle connecting frame (9). The right welding nozzle connecting frame (9) is tunably connected to the right welding nozzle connecting block (10) via a Y-axis fine-tuning mechanism, and the right welding nozzle (3) is tunably located inside the right welding nozzle connecting block (10); each X-axis fine-tuning mechanism includes An X-direction fixing block (13), an X-direction slider (14), an X-direction fixing rod (12), and an X-direction adjusting screw (11) are arranged parallel to each other along the X-direction. The X-direction fixing block (13) is fixed to the opening and closing block on the corresponding side. One end of the X-direction fixing rod (12) is inserted into the X-direction fixing block (13) and the other end slides with the X-direction slider (14). One end of the X-direction adjusting screw (11) abuts against the X-direction fixing block (13) and the other end is threadedly connected to the X-direction slider (14). The Y-direction fine-tuning machine The structure includes a Y-direction slide rail (24), a Y-direction limiting slide rod (23), and a Y-direction adjusting screw (22) arranged parallel to each other along the Y-direction. The Y-direction slide rail (24) is fixed on the corresponding side of the welding nozzle connecting frame. The welding nozzle connecting block is slidably connected to the Y-direction slide rail (24) along the Y-direction. One end of the Y-direction limiting slide rod (23) is guided and inserted into the welding nozzle connecting frame, and the other end is slidably engaged with the welding nozzle connecting block. The Y-direction adjusting screw (22) is threaded into the welding nozzle connecting block, and its end abuts against the welding nozzle connecting frame. The structure is characterized by: Adjust the position of the left welding nozzle (2) by the X-axis fine adjustment mechanism and the Y-axis fine adjustment mechanism; after the position of the left welding nozzle (2) is fixed, take the left welding nozzle (2) as the standard, and adjust the position of the right welding nozzle (3) by the X-axis fine adjustment mechanism, the Z-axis fine adjustment mechanism and the Y-axis fine adjustment mechanism respectively, and fix the right welding nozzle (3) after it is adjusted to the position. If it is found that the welding nozzle is vertically attached and the discharge port is not in the center position, the overall X direction is adjusted by the fine adjustment mechanism on the left or right side to adjust the center position of the left welding nozzle (2) and the right welding nozzle (3). After adjustment, manually check whether the contact surfaces of the left and right welding nozzles are in the center. After confirming that they are in the center, tighten the screws of the fine adjustment mechanism. If it is found that the Y direction of the discharge port is not in the middle of the left and right welding nozzles and there is a deviation, then for the left welding nozzle (2), loosen the screw of the Y direction fine adjustment mechanism on the left opening and closing block (4) and adjust the front and rear position of the left welding nozzle (2) in the Y direction. After adjustment, take the left welding nozzle (2) as the standard and adjust the position of the right welding nozzle (3) accordingly. At this time, for the Y direction position adjustment of the right welding nozzle (3), the rotation range of the screw of the Y direction fine adjustment mechanism on the left opening and closing block (4) can be determined according to the rotation range of the screw of the Y direction fine adjustment mechanism on the right opening and closing block (5), which drives the left welding nozzle (2) and the right welding nozzle (3) to adjust the displacement in the Y direction synchronously.

2. The fine-tuning method of the fine-tuning mechanism as described in claim 1, characterized in that: The X-axis fine-tuning mechanism further includes an X-axis slide rail (15), which is fixed on the corresponding opening and closing block and parallel to the X-axis fixed slide rod (12) on the opening and closing block. The X-axis slide rail (15) has a groove parallel to the direction of the X-axis fixed slide rod (12), and the X-axis slider (14) has a protrusion (16) that cooperates with the groove.

3. The fine-tuning method of the fine-tuning mechanism as described in claim 2, characterized in that: The X-axis slider (14) is provided with a fixing strip (18) above the corresponding boss (16). There is a gap (17) between the fixing strip (18) and the boss (16). Several set screws (19) are threaded on the fixing strip (18). The end of the screw points to the slide groove and engages with the boss (16) and the slide groove to tighten.

4. The fine-tuning method of the fine-tuning mechanism as described in claim 3, characterized in that: The gap (17) has an L-shaped cross section with the opening facing downwards, that is, the thickness of the boss (16) corresponding to the position that mates with the slide groove is greater than the thickness of the position where the boss (16) connects with the X-axis slider (14).

5. The fine-tuning method of the fine-tuning mechanism as described in claim 1, characterized in that: The Z-axis fine-tuning mechanism includes a Z-axis slide rail (21) arranged parallel to the Z-axis, a Z-axis adjusting screw (20), and a Z-axis positioning rod. The Z-axis slide rail (21) is fixed to the right opening block (5) along the Z-axis. The X-axis fine-tuning mechanism corresponding to the right opening block (5) is slidably connected to the Z-axis slide rail (21). One end of the Z-axis adjusting screw (20) is inserted into and limited in the right opening block (5), and the other end is threadedly engaged with the X-axis fine-tuning mechanism corresponding to the right opening block (5). The Z-axis positioning rod is slidably limited to the X-axis fine-tuning mechanism.

6. The fine-tuning method of the fine-tuning mechanism as described in claim 1, characterized in that: The right welding nozzle (3) is tunably connected to the right welding nozzle connecting block (10) via a universal ball joint (6).

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