Double-shaft rotary welding tool and using method thereof

Abstract

The invention belongs to the field of clamping plate welding auxiliary equipment, and particularly relates to a double-shaft rotating welding tool and a using method thereof.The double-shaft rotating welding tool structurally comprises a middle shaft overturning assembly, a driving side supporting assembly, a driven side supporting assembly, a center rotating assembly, a center shaft assembly and a welding bearing table assembly, and the center shaft assembly is installed in the middle of the welding bearing table; the center rotation assembly is installed above the center shaft assembly, one end of the center rotation assembly is fixed to the bottom of the driving side support assembly, and the other end of the center rotation assembly is fixed to the bottom of the driven side support assembly. One end of the center shaft turnover assembly is connected with the top end of the driving side support assembly, and the other end of the center shaft turnover assembly is connected with the top end of the driven side support assembly. The driving side supporting assembly is fixedly connected with a speed reducer through a speed reducer mounting frame, and the outer side of the speed reducer is connected with a hand wheel assembly. The welding tool is simple in overall structure and convenient to operate and control, has a double-shaft overturning function, achieves rapid and accurate positioning, guarantees the consistency of assembly and welding sizes and assemblies of the same batch, facilitates welding operation and improves production efficiency.

Description

Technical Field

[0001] The invention belongs to the field of splint welding auxiliary equipment, and in particular relates to a double-axis rotary welding tool and a use method thereof. Background Art

[0002] Due to the high precision requirements of weapons, the welding of irregular-shaped parts in weapons usually requires special tooling to provide positioning, assembly, welding and other functions. However, existing tooling has problems such as large size, complicated and cumbersome operation, and cannot be reused. It cannot meet the unified positioning, assembly and welding of the same parts, resulting in the problem of inconsistent welding deviations of the same parts and the same batch; in addition, the existing tooling does not have a dual-axis flipping function, and the welded parts are repeatedly moved and positioned during the welding process, which easily leads to the problem of inconsistent welding deviations and low production efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a dual-axis rotary welding tool and a method of using the same, so as to solve the problems of the existing tool being large in size, complicated and cumbersome in operation, non-reusable, unable to meet the requirements of unified positioning, assembly and welding of the same parts, and lacking a dual-axis flipping function.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme: A double-axis rotary welding tool comprises a central axis flip component, a driving side support component, a driven side support component, a center rotation component, a center axis component and a welding bearing platform component, wherein the center axis component is installed in the middle of the welding bearing platform component, and the center rotation component is installed above the center axis component, one end of the center rotation component is fixed to the bottom of the driving side support component, and the other end is fixed to the bottom of the driven side support component, one end of the central axis flip component is connected to the top of the driving side support component, and the other end is connected to the top of the driven side support component, the driving side support component is fixedly connected to the reducer through a reducer mounting frame, and the outer side of the reducer is connected to a handwheel assembly.

[0005] Preferably, the welding bearing platform comprises a mounting plate and a bearing frame, the mounting plate is fixed above the bearing frame, an eccentric mounting hole is arranged in the center of the mounting plate, so as to reduce the rotation resistance and ensure the smooth rotation of the center rotation component, thereby improving the adaptability of the equipment; the center shaft comprises a center shaft, an upper bearing cover, a flange bearing seat, a tapered roller bearing, a bearing inner ring, a round nut, a rotation connecting bolt, a fixing pin and a flange fixing nut; the flange bearing seat is fixed to the mounting plate through the eccentric mounting hole by the flange fixing nut, the center shaft is outerly provided with an upper bearing cover and penetrates into the flange bearing seat, the upper bearing cover is fixed to the flange bearing seat, a tapered roller bearing is fixed at the bottom end between the center shaft and the flange bearing seat, a bearing inner ring is arranged in the tapered roller bearing, and the round nut, the bearing inner ring and the stop washer cooperate to lock the tapered roller bearing.

[0006] Preferably, the center rotation component includes an eccentric rotating frame, a fastening nut and a stop bolt. The top of the center shaft is fixed to the eccentric rotating frame by a rotating connecting bolt. A fastening nut is provided at the bottom of the eccentric rotating frame and a stop bolt is provided at the top. The fixing pin positions and connects the top of the center shaft and the eccentric rotating frame.

[0007] Preferably, the driving side support component includes a driving side support frame, a bearing seat, a driving inner bearing cover, a driving outer bearing cover, a cylindrical roller bearing, a spherical roller bearing, a round nut and a bearing inner ring. The bearing seat passes through the driving side support frame, a driving inner bearing cover is provided at one end of the bearing seat, and a driving outer bearing cover is provided at the other end. A spherical roller bearing is provided at the driving inner bearing cover end of the bearing seat, and a cylindrical roller bearing is provided at the driving outer bearing cover end. Both the cylindrical roller bearing and the spherical roller bearing are provided with bearing inner rings. The round nut, the bearing inner ring and the stop washer cooperate to fasten the cylindrical roller bearing and the spherical roller bearing.

[0008] Preferably, the driven side support component includes a driven side support frame, a bearing seat, a driven inner bearing cover, a driven outer bearing cover, a cylindrical roller bearing and a round nut; the bearing seat passes through the driven side support frame, a driven inner bearing cover is provided at one end of the bearing seat, and a driven outer bearing cover is provided at the other end, a cylindrical roller bearing is provided in the bearing seat, and the round nut fastens the cylindrical roller bearing, and the bottom ends of the driving side support frame and the driven side support frame are fixed to the eccentric rotating frame by connecting bolts.

[0009] Preferably, the central axis flipping component includes a central axis flipping frame, a driving shaft, a driven shaft, a fitting block, a side fixing block, a center positioning pin, a clamping block and double-sided adjustment screws; the driving shaft is fixed on the left side of the central axis flipping frame, and the driven shaft is fixed on the right side, the driving shaft is connected to the bearing seat in the driving side support frame, and the driven shaft is connected to the bearing seat in the driven side support frame, a center positioning pin is provided in the middle of the central axis flipping frame, a clamping cover is provided on the top of the center positioning pin, the fitting blocks are fixed on the left and right sides by fitting fixing screws, the side fixing blocks are fixed above the fitting blocks, a clamping block is provided above the side fixing blocks, and double-sided adjustment screws are provided in the grooves on both sides of the central axis flipping frame.

[0010] Preferably, the central axis flip frame comprises a bottom plate, a left plate and a right plate, the bottom plate and the left plate and the right plate are vertically fixed, and the top grooves of the left plate and the right plate are provided with double-sided adjustment screws.

[0011] Preferably, the bearing frame includes a bottom frame and a top frame, the bottom frame and the top frame have the same structure, the bottom frame includes a plurality of square steel tubes, the plurality of square steel tubes are vertically fixed in the horizontal direction to form a rectangular bottom frame, the bottom frame and the top frame are fixed by a support plate, the fixing points of the support plate and the bottom frame and the top frame are reinforced by angle steels, and rubber pads are provided under the square tube nodes of the bottom frame.

[0012] The specific operation steps of the above-mentioned dual-axis rotary welding tool are as follows: S1: Install the fitting block, side fixing block, fitting fixing screws, center positioning pin and double-side adjustment screws; S2: Place the parts to be welded and fasten them with the clamping cover, clamping block and nut; S3: According to the position of the frame, shake the handwheel assembly to drive the reducer so that the drive shaft drives the central axis flip frame to rotate, rotate the eccentric rotary frame, and adjust the welding angle; S4: After reaching the required angle and determining the position, the central axis turning frame and the eccentric rotating frame are locked and welding is carried out; S5: The lock can be released at any time during welding to adjust the welding position and welding angle; S6: After welding is completed, loosen the fixing nut, quickly disassemble the weldment, and reset the rotation angle; S7: In the above step S1, the engaging block, the side fixing block, the engaging fixing screw, the center positioning pin and the double-sided adjustment screws are only performed before the first piece of the same batch is welded, and there is no need to reinstall them later. The S2 step is executed first.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The interlocking blocks, side fixing blocks, interlocking fixing screws, center positioning pins and double-sided adjustment screws formed by the flipping of the central axis can be reused to achieve unified positioning, assembly and welding of the same parts, avoid inconsistency in welding deviations of the same parts in the same batch, ensure the same size of the welded parts in the same batch after welding, avoid welding deviations, control the post-welding processing allowance, ensure production quality, and realize lean management of the connection process of the production process; (2) Through the combination of the central axis flip frame and the eccentric rotating frame, it can realize 360° flipping along the horizontal axis and 360° rotation along the vertical axis. Through the combination of spherical roller bearings, cylindrical roller bearings and tapered roller bearings, it can stop at any angle of bidirectional rotation. It has a dual-axis flipping function, realizes fast and accurate positioning, ensures the same assembly and welding dimensions as the components of the same batch, facilitates welding operations, and improves production efficiency; (3) The overall structure of the welding tooling is simple, easy to operate, highly functional, adaptable and safe, avoiding welding deviations and operational safety hazards caused by homemade welding platforms or temporary welding tooling due to loose fixation, unstable connection or welding deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front view of the structure of the present invention; Figure 3 It is a cross-sectional view of an equiaxial structure of the central axis of the structure of the present invention; Figure 4This is a schematic diagram of the central axis flip structure of the present invention; Figure 5 It is a sectional view of the drive side support assembly of the present invention; Figure 6 It is a sectional view of the driven side support assembly of the present invention; Figure 7 This is a schematic diagram of the central rotation structure of the present invention; Figure 8 A cross-sectional view of the central axis of the present invention; Fig. 9 It is a partial cross-sectional view of the welding bearing platform of the present invention; Fig.10 It is a schematic diagram of the structure of fastening the parts to be welded during use of the present invention.

[0015] Explanation of the reference numerals: 1. Central axis flip assembly; 2. Driving side support assembly; 3. Driven side support assembly; 4. Center rotation assembly; 5. Central axis assembly; 6. Welding bearing assembly; 7. Reducer; 8. Handwheel assembly; 10. Central axis flip frame; 11. Driving shaft; 12. Driven shaft; 13. Engaging block; 14. Side fixing block; 15. Center positioning pin; 16. Clamping cover; 17. Clamping block; 18. Double-side adjustment screws; 19. Engaging fixing screws; 21. Driving side support frame; 22. Driving inner bearing cover; 23. Driving outer bearing cover; 24. Cylindrical roller bearing 1; 25. Self-aligning roller Bearing; 26, round nut one; 27, bearing inner ring one; 28, connecting bolt one; 31, driven side support frame; 32, driven inner bearing cover; 33, driven outer bearing cover; 34, cylindrical roller bearing two; 35, round nut two; 36, connecting bolt two; 41, eccentric slewing frame; 42, fastening nut; 43, stop bolt; 51, center shaft; 52, upper bearing cover; 53, flange bearing seat; 54, tapered roller bearing; 55, bearing inner ring two; 56, round nut three; 57, slewing connecting bolt; 58, fixing pin; 59, flange fixing nut; 61, mounting plate; 62, support frame. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1-3As shown, a double-axis rotary welding tool includes a central axis flip component 1, a driving side support component 2, a driven side support component 3, a center rotation component 4, a center axis component 5 and a welding bearing platform component 6. The center axis component 5 is installed in the middle of the welding bearing platform component 6, and the center rotation component 4 is installed above the center axis component 5. One end of the center rotation component 4 is fixed to the bottom of the driving side support component 2, and the other end is fixed to the bottom of the driven side support component 3. One end of the central axis flip component 1 is connected to the top of the driving side support component 2, and the other end is connected to the top of the driven side support component 3. The driving side support component 2 is fixedly connected to the reducer 7 through a reducer mounting frame, and the outer side of the reducer 7 is connected to a handwheel assembly 8.

[0018] A further embodiment of the present invention is as follows: Figure 8-9 As shown, the welding bearing platform component 6 includes a mounting plate 61 and a bearing frame 62, the mounting plate 61 is fixed above the bearing frame 62, and an eccentric mounting hole is arranged at the center of the mounting plate 61. The central shaft component 5 includes a central shaft 51, an upper bearing cover 52, a flange bearing seat 53, a tapered roller bearing 54, a second bearing inner ring 55, a third round nut 56, a rotary connecting bolt 57, a fixing pin 58 and a flange fixing nut 59; the flange bearing seat 53 passes through the eccentric mounting hole and is fixed on the mounting plate 61 by the flange fixing nut 59, and an upper shaft is arranged outside the central shaft 51. The bearing cover 52 is inserted into the flange bearing seat 53, the upper bearing cover 52 is fixed to the flange bearing seat 53, and a tapered roller bearing 54 is fixed at the bottom end between the center shaft 51 and the flange bearing seat 53. The tapered roller bearing 54 is provided with a second bearing inner ring 55, and the round nut three 56, the second bearing inner ring 55 and the locking washer cooperate to lock the tapered roller bearing 54; the eccentric mounting hole is used to reduce the rotation resistance to ensure the smooth rotation of the center rotation component; the tapered roller bearing is used to reduce friction, adapt to the combined load, improve operation reliability, and extend service life.

[0019] A further embodiment of the present invention is as follows: Figure 7 As shown, the central rotating component 4 includes an eccentric rotating frame 41, a fastening nut 42 and a stop bolt 43. The top of the central shaft 51 is fixed to the eccentric rotating frame 41 by a rotating connecting bolt 57. The fastening nut 42 is arranged at the bottom of the eccentric rotating frame 41, and the stop bolt 43 is arranged at the top. The fixing pin 58 positions and connects the top of the central shaft 51 and the eccentric rotating frame 41. The eccentric rotating frame is fixed to the central shaft to realize 360° rotation of the vertical axis, and the welding angle is flexibly adjusted. The tapered roller bearing and the fixing pin composed of the eccentric rotating frame and the central shaft are precisely positioned to ensure the uniformity of the components in the same batch. The eccentric rotating frame is fixed to the mounting plate by the fastening nut to improve the stability of the device.

[0020] A further embodiment of the present invention is as follows: Figure 5As shown, the driving side support component 2 includes a driving side support frame 21, a bearing seat, a driving inner bearing cover 22, a driving outer bearing cover 23, a cylindrical roller bearing 24, a spherical roller bearing 25, a round nut 26, a bearing inner ring 27 and a connecting bolt 28. The bearing seat passes through the driving side support frame 21. One end of the bearing seat is provided with a driving inner bearing cover 22, and the other end is provided with a driving outer bearing cover 23. The end of the driving inner bearing cover 22 in the bearing seat is provided with a spherical roller bearing 25. A cylindrical roller bearing 24 is provided at the end of the outer bearing cover 23, and a bearing inner ring 27 is provided in each of the cylindrical roller bearing 24 and the spherical roller bearing 25. A round nut 26, a bearing inner ring 27 and a retaining washer cooperate to lock the cylindrical roller bearing 24 and the spherical roller bearing 25. The bottom end of the driving side support frame 21 is fixed to the eccentric rotating frame 41 by a connecting bolt 28; the cylindrical roller bearing and the spherical roller bearing are locked by a round nut and a bearing inner ring to improve stability.

[0021] A further embodiment of the present invention is as follows: Figure 6 As shown, the driven side support component 3 includes a driven side support frame 31, a bearing seat, a driven inner bearing cover 32, a driven outer bearing cover 33, a cylindrical roller bearing 34, a round nut 35 and a connecting bolt 36; the bearing seat passes through the driven side support frame 31, a driven inner bearing cover 32 is provided at one end of the bearing seat, and a driven outer bearing cover 33 is provided at the other end, a cylindrical roller bearing 34 is provided in the bearing seat, a round nut 35 fastens the cylindrical roller bearing 34, and the bottom end of the driven side support frame 31 is fixed to the eccentric rotating frame 41 by a connecting bolt 36; the cylindrical roller bearing 34 is locked by a round nut 1 to improve stability.

[0022] A further embodiment of the present invention is as follows: Figure 3 and Figure 4As shown, the middle axis flip component 1 includes a middle axis flip frame 10, a driving shaft 11, a driven shaft 12, a fitting block 13, a side fixing block 14, a center positioning pin 15, a clamping block 17, a double-sided adjustment screw 18 and a fitting fixing screw 19; the middle axis flip frame 10 fixes the driving shaft 11 on the left side and the driven shaft 12 on the right side, the driving shaft 11 is connected to the bearing seat in the driving side support frame 21, and the driven shaft 12 is connected to the bearing seat in the driven side support frame 31, a center positioning pin 15 is arranged in the middle of the middle axis flip frame 10, and a clamping cover 16 is arranged on the top of the center positioning pin 15, and the fitting block 13 is fixed on the left and right sides by the fitting fixing screws 19, and the fitting block 13 is fixed on the left and right sides. A side fixing block 14 is fixed on the side, a clamping block 17 is arranged above the side fixing block 14, and double-sided adjustment screws 18 are arranged in the grooves on both sides of the central axis turning frame 10; the driving shaft 11 is fixedly connected to the reducer 7 through the reducer mounting frame, and the outer side of the reducer 7 is connected to the handwheel assembly 8; the reducer drives the central axis turning frame to turn 360° along the horizontal axis through the handwheel assembly, and the eccentric rotating frame composed of the center rotation rotates 360° along the vertical axis to complete the double-axis turning; the central axis turning frame is combined with the cylindrical roller bearings and spherical roller bearings composed of the driving side support and the cylindrical roller bearings composed of the driven side support to achieve accurate positioning of the central axis turning frame and ensure the accuracy of the welding angle.

[0023] The present invention provides a method for using the above-mentioned dual-axis rotary welding tool, and the specific operating steps are as follows: S1: Install the fitting block 13, the side fixing block 14, the fitting fixing screws 19, the center positioning pin 15 and the double-side adjustment screws 18; S2: Place the parts to be welded and fasten them with the clamping cover 16, clamping block 17 and nuts. Fig.10 As shown; S3: According to the position of the frame, the hand wheel assembly 8 is shaken to drive the reducer 7 so that the driving shaft 11 drives the middle axis flip frame to rotate 10, and the eccentric rotating frame 41 is rotated to adjust the welding angle; S4: After reaching the required angle and determining the position, the central axis turning frame 10 and the eccentric rotating frame 41 are locked and welding is performed; S5: The lock can be released at any time during welding to adjust the welding position and welding angle; S6: After welding is completed, loosen the fixing nut, quickly disassemble the weldment, and reset the rotation angle; S7: In the above step S1, the engaging block 13, the side fixing block 14, the engaging fixing screw 19, the center positioning pin 15 and the double-sided adjustment screws 18 are only performed before the first piece of the same batch is welded, and there is no need to reinstall them later. The step S2 is executed first.

Claims

1. A dual-axis rotary welding tool, characterized in that: The invention comprises a central axis flip component (1), a driving side support component (2), a driven side support component (3), a center rotation component (4), a central axis component (5) and a welding bearing platform component (6), wherein the central axis component (5) is installed in the middle of the welding bearing platform component (6), the central rotation component (4) is installed above the central axis component (5), one end of the central rotation component (4) is fixed to the bottom of the driving side support component (2), and the other end is fixed to the bottom of the driven side support component (3), one end of the central axis flip component (1) is connected to the top of the driving side support component (2), and the other end is connected to the top of the driven side support component (3), the driving side support component (2) is fixedly connected to the reducer (7) through a reducer mounting frame, and the outer side of the reducer (7) is connected to a handwheel component (8).

2. A dual-axis rotary welding tool according to claim 1, characterized in that: The welding bearing platform component (6) includes a mounting plate (61) and a bearing frame (62), the mounting plate (61) is fixed above the bearing frame (62), an eccentric mounting hole is provided at the center of the mounting plate (61), and the central shaft component (5) includes a central shaft (51), an upper bearing cover (52), a flange bearing seat (53), a tapered roller bearing (54), a second bearing inner ring (55), a third round nut (56), a slewing connection bolt (57), a fixing pin (58) and a flange fixing nut (59); the flange bearing seat (53) passes through the eccentric mounting hole. The mounting hole is fixed on the mounting plate (61) through a flange fixing nut (59); an upper bearing cover (52) is arranged on the outer surface of the central shaft (51) and penetrates into the flange bearing seat (53); the upper bearing cover (52) is fixed to the flange bearing seat (53); a tapered roller bearing (54) is fixed at the bottom end between the central shaft (51) and the flange bearing seat (53); a second bearing inner ring (55) is arranged in the tapered roller bearing (54); the third round nut (56), the second bearing inner ring (55) and a stop washer cooperate to lock the tapered roller bearing (54).

3. A dual-axis rotary welding tool according to claim 2, characterized in that: The central rotating component (4) comprises an eccentric rotating frame (41), a fastening nut (42) and a stop bolt (43); the top of the central shaft (51) is fixed to the eccentric rotating frame (41) via a rotating connecting bolt (57); a fastening nut (42) is provided at the bottom of the eccentric rotating frame (41) and a stop bolt (43) is provided at the top; the fixing pin (58) positions and connects the top of the central shaft (51) and the eccentric rotating frame (41).

4. A dual-axis rotary welding tool according to claim 3, characterized in that: The driving side support component (2) comprises a driving side support frame (21), a bearing seat, a driving inner bearing cover (22), a driving outer bearing cover (23), a cylindrical roller bearing (24), a spherical roller bearing (25), a round nut (26) and a bearing inner ring (27); the bearing seat passes through the driving side support frame (21); a driving inner bearing cover (22) is arranged at one end of the bearing seat, and a driving outer bearing cover (22) is arranged at the other end; a spherical roller bearing (25) is arranged at the end of the driving inner bearing cover (22) in the bearing seat; a cylindrical roller bearing (24) is arranged at the end of the driving outer bearing cover (23); a bearing inner ring (27) is arranged in each of the cylindrical roller bearing (24) and the spherical roller bearing (25); the round nut (26), the bearing inner ring (27) and the retaining washer cooperate to fasten the cylindrical roller bearing (24) and the spherical roller bearing (25).

5. A dual-axis rotary welding tool according to claim 4, characterized in that: The driven side support component (3) comprises a driven side support frame (31), a bearing seat, a driven inner bearing cover (32), a driven outer bearing cover (33), a cylindrical roller bearing (34) and a round nut (35); the bearing seat passes through the driven side support frame (31), one end of the bearing seat is provided with a driven inner bearing cover (32), the other end is provided with a driven outer bearing cover (33), a cylindrical roller bearing (34) is provided in the bearing seat, the round nut (35) fastens the cylindrical roller bearing (34), and the bottom ends of the driving side support frame (21) and the driven side support frame (31) are fixed to the eccentric rotating frame (41) by connecting bolts.

6. A dual-axis rotary welding tool according to claim 5, characterized in that: The central axis flip component (1) comprises a central axis flip frame (10), a driving shaft (11), a driven shaft (12), a fitting block (13), a side fixing block (14), a center positioning pin (15), a clamping block (17) and double-side adjustment screws (18); the central axis flip frame (10) fixes the driving shaft (11) on the left side and fixes the driven shaft (12) on the right side; the driving shaft (11) is connected to a bearing seat in a driving side support frame (21); the driven shaft (12) is connected to a bearing seat in a driven side support frame (31); a center positioning pin (15) is provided in the middle of the central axis flip frame (10); a clamping cover (16) is provided at the top end of the center positioning pin (15); the fitting block (13) is fixed on both the left and right sides by fitting fixing screws (19); a side fixing block (14) is fixed above the fitting block (13); a clamping block (17) is provided above the side fixing block (14); and double-side adjustment screws (18) are provided in grooves on both sides of the central axis flip frame (10).

7. A dual-axis rotary welding tool according to claim 6, characterized in that: The central axis turning frame (10) comprises a bottom plate, a left side plate and a right side plate, wherein the bottom plate and the left side plate and the right side plate are fixed perpendicularly in a vertical direction, and the top grooves of the left side plate and the right side plate are provided with double-sided adjustment screws (18).

8. A dual-axis rotary welding tool according to claim 7, characterized in that: The bearing frame (62) comprises a bottom frame and a top frame, the bottom frame and the top frame have the same structure, the bottom frame comprises a plurality of square steel tubes, the plurality of square steel tubes are fixed vertically in a horizontal direction to form a rectangular bottom frame, the bottom frame and the top frame are fixed by a support plate, the fixing points of the support plate and the bottom frame and the top frame are reinforced by angle steel, and rubber pads are provided below the nodes of the square tubes of the bottom frame.

9. The method for using the dual-axis rotary welding tool as claimed in claim 8, characterized in that: The steps are as follows: S1: Install the engaging block (13), the side fixing block (14), the engaging fixing screw (19), the center positioning pin (15) and the double-side adjustment screws (18); S2: placing the workpiece to be welded, and fastening the workpiece to be welded by means of a clamping cover (16), a clamping block (17) and a nut; S3: According to the position of the frame, the hand wheel assembly (8) is shaken to drive the reducer (7) so that the drive shaft (11) drives the middle axis turning frame (10) to rotate, and the eccentric rotating frame (41) is rotated to adjust the welding angle; S4: After the required angle is reached and the position is determined, the central axis turning frame (10) and the eccentric rotating frame (41) are locked and welding is performed; S5: The lock can be released at any time during welding to adjust the welding position and welding angle; S6: After welding is completed, loosen the fixing nut, quickly disassemble the weldment, and reset the rotation angle; S7: The engaging block (13), the side fixing block (14), the engaging fixing screw (19), the center positioning pin (15) and the double-side adjustment screws (18) in the above step S1 are only performed before the first piece of the same batch is welded, and there is no need to reinstall them later. The step S2 is executed first.

Images