CN113400021A

CN113400021A - Welding device and welding process

Info

Publication number: CN113400021A
Application number: CN202110594714.XA
Authority: CN
Inventors: 沈飞; 赵传亚; 包国旭; 徐杰; 龙秀斌
Original assignee: Zhejiang Hongyi Magnetoelectric Technology Co ltd
Current assignee: Zhejiang Hongyi Magnetoelectric Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-09-17

Abstract

The application relates to the field of welding, in particular to a welding device and a welding process, which comprise a material placing plate; welding a platform; a welding robot; the feeding assembly comprises a rack, a guide rail, a first driving piece, a first cutting piece and a second oblique driving assembly, wherein the guide rail is provided with a containing groove and used for containing a profile, the first driving piece is used for driving the profile to move along the length direction of the containing groove on the guide rail, the first cutting piece is used for cutting the profile to form a first inclined plane of a rod body, and the second oblique driving assembly is used for cutting the profile to form a second rod body. The section bar is placed in the guide rail, the section bar is cut through the first cutting piece and the second cutting piece, and the bar body formed by cutting the section bar is driven to move above the discharging plate. Repeating for four times, the rod bodies on the discharging plates are spliced into a frame body, and the rod bodies on the frame body are welded and fixed through the welding robot. The whole process needs fewer parts to participate in the manual work, and the production efficiency is improved.

Description

Welding device and welding process

Technical Field

The application relates to the field of welding, in particular to a welding device and a welding process.

Background

Welding is often required between the spare parts of the current products. If the frame body needs to be manufactured, referring to fig. 17, the frame body 39 includes four rod bodies 38, two ends of each rod body 38 are arranged in an inclined plane, and the four rod bodies 38 are abutted in pairs to form the frame body 39. The inclined planes at the two ends of the rod body 38 are respectively a first inclined plane and a second inclined plane. And then welding the two adjacent rod bodies 38 together to complete the manufacture of the frame body 39.

During processing, the profile needs to be cut into the rod body 38, the rod body 38 is spliced and then placed on the welding platform 2, and the rod body 38 is welded by the welding robot.

In the related art, the rod body 38 needs to be spliced manually, so the inventor thinks that the related art has the defect of low production efficiency.

Disclosure of Invention

In order to improve the production efficiency of the device,

in a first aspect, the present application provides a welding apparatus, which adopts the following technical scheme:

a welding device comprises

The discharging plate is used for placing the rod body;

the welding platform is used for placing a material placing plate;

the welding robot is positioned at one end of the welding platform and used for welding and splicing the rod body on the discharging plate;

the feeding assembly comprises a rack, a guide rail, a first driving piece, a first cutting piece, a second cutting piece and a second driving piece, wherein the guide rail is provided with an accommodating groove and used for accommodating a sectional material;

the driving assembly comprises a third driving piece and a fourth driving piece, the third driving piece is used for driving the discharging plate to rotate, the fourth driving piece is used for driving the discharging plate to slide on the welding platform, and the sliding direction of the discharging plate to the welding platform is perpendicular to the sliding direction of the rod body relative to the guide rail.

Through adopting above-mentioned technical scheme, place the guide rail with the section bar in, cut it through first cutting piece and second cutting piece, and the body of rod after the cutting section bar forms is driven and is moved the blowing board top. Repeating for four times, the rod bodies on the discharging plates are spliced into a frame body, and the rod bodies on the frame body are welded and fixed through the welding robot. The whole process needs fewer parts to participate in the manual work, and the production efficiency is improved.

Optionally, the first cutting member is slidably connected to the frame along an oblique direction of the first inclined surface, the guide rail is provided with a first through groove for the first cutting member to pass through, the second cutting member is slidably connected to the frame along an oblique direction of the second inclined surface, and the guide rail is provided with a second through groove for the second cutting member to pass through; the first cutting piece and the second cutting piece alternately cut the section.

Through adopting above-mentioned technical scheme to make first cutting member and second cutting member can be more smooth and easy cut the section bar, can not be interfered by the guide rail and lead to the section bar can't be cut off completely.

Optionally, the first driving part comprises a push block, a screw rod and a driving motor, a sliding groove is formed in the bottom surface of the accommodating groove, the lower end of the push block is connected with a sliding block connected in the sliding groove in a sliding mode, the push block is connected in the accommodating groove in a sliding mode, the screw rod is arranged along the length direction of the sliding groove and is connected to the sliding block in a threaded mode, the screw rod is connected to the guide rail in a rotating mode, and the driving motor is used for driving the screw rod to rotate.

Through adopting above-mentioned technical scheme, drive the lead screw through driving motor and rotate to drive the slider and slide in the spout, thereby realize the slip of ejector pad in the guide rail holding tank. The section bar in the guide rail is driven to move towards the material placing plate by the movement of the pushing block.

Optionally, the first driving part includes a push block, a transmission belt, a driving wheel and a driving motor, a sliding groove is formed in the bottom surface of the accommodating groove, the lower end of the push block is connected with a sliding block connected in the sliding groove in a sliding mode, the push block is connected in the accommodating groove in a sliding mode, the transmission belt penetrates through the sliding groove and is sleeved outside the guide rail, the two driving wheels are connected to the guide rail in a rotating mode, the two driving wheels tension the transmission belt, and the driving motor is used for ordering the.

Through adopting above-mentioned technical scheme, drive the drive wheel through driving motor and rotate to drive the drive belt motion, realize the slip of ejector pad in the guide rail holding tank. The section bar in the guide rail is driven to move towards the material placing plate by the movement of the pushing block.

Optionally, a linkage mechanism is arranged between the first cutting member and the driving wheel, and the linkage assembly is used for driving the first cutting member to slide in a reciprocating manner relative to the frame along with the feeding of the section bar.

By adopting the technical scheme, the first cutting piece can better match the cutting of the section bar and the feeding of the section bar. Meanwhile, the first cutting piece does not need an extra driving source, so that energy is saved.

Optionally, the linkage mechanism includes a first gear coaxially connected to the driving wheel, a second gear meshed with the first gear, a driven member fixedly mounted below the first cutting member, and a force transmission assembly, the first gear and the second gear are both bevel gears, a mounting groove is formed in the driven member, auxiliary racks are respectively arranged on the upper end wall and the lower end wall of the mounting groove, a third gear is arranged in the mounting groove, the third gear is sequentially and respectively meshed with the two auxiliary racks when rotating, and the force transmission assembly is used for transmitting a rotation pair of the second gear to the third gear.

Through adopting above-mentioned technical scheme, at the pivoted in-process of drive wheel, first gear revolve, drive the rotation of second gear in proper order, and the third gear rotates. When the third gear is engaged with the auxiliary rack on the upper end surface of the mounting groove, the driven piece moves towards the direction close to the guide rail. When the third gear is engaged with the auxiliary rack on the lower end surface of the mounting groove, the driven piece moves in the direction away from the guide rail. Thereby effecting a reciprocating movement of the first cutting member.

Optionally, the driving wheel connected with the driving motor is an incomplete gear, and the driving belt is a toothed belt.

By adopting the technical scheme, the driving wheel drives the driving belt to move intermittently in time. So that the profile is in a stationary state when the first cutting member cuts the profile. The sectional material can be cut more stably and smoothly.

Optionally, the force transmission assembly comprises a driving wheel coaxially connected to the second gear, a driven wheel coaxially connected to the third gear, and a linkage belt connected to the driven wheel and the driving wheel, and the linkage belt is sleeved outside the driving wheel and the driven wheel and is tensioned by the driving wheel and the driven wheel.

By adopting the technical scheme, the second gear and the third gear are linked through the linkage belt, so that the synchronous rotation of the second gear and the third gear is realized.

Optionally, the fourth driving part is a conveyor, and the welding platforms are provided with a plurality of welding platforms along the feeding direction of the conveyor.

Through adopting above-mentioned technical scheme, when the guide rail carries out the ejection of compact to the flitch of putting on one of them welded platform, welding robot can weld the body of rod on the other welded platform, has improved production efficiency.

In a second aspect, the welding process provided by the present application adopts the following technical scheme:

a welding process for welding by a welding device comprises the following steps,

s1, cutting the section bar in the guide rail through the first cutting piece and the second cutting piece to form the section bar;

s2, pushing the rod bodies to the material discharging plates and splicing the rod bodies on the material discharging plates to form a frame body;

s3, moving the discharging plate to the position below the welding robot;

and S3, welding the frame on the discharging plate by the welding robot.

By adopting the technical scheme, the parts needing manual participation in the whole process are fewer, and the production efficiency is improved.

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

1. the labor intensity of workers is low;

2. the production efficiency is high;

3. and energy is saved.

Drawings

FIG. 1 is a schematic structural view of example 1.

Fig. 2 is a schematic structural view of the embodiment 1 without the rod body.

Fig. 3 is a sectional view at the push block of embodiment 1.

Fig. 4 is a sectional view of embodiment 1 at a third driver.

Fig. 5 is a schematic structural view of the material discharge plate of embodiment 1 with a rod body placed thereon.

Fig. 6 is a schematic view of the discharge plate of example 1 ready to receive a second rod.

Fig. 7 is a schematic structural view of the material discharge plate of embodiment 1 with two rod bodies placed thereon.

Fig. 8 is a schematic view of the discharge plate of embodiment 1 ready to receive a third rod.

Fig. 9 is a schematic structural view of the material discharge plate in embodiment 1 with three rods placed thereon.

Fig. 10 is a schematic view of the discharge plate of embodiment 1 ready to receive the fourth rod body.

Fig. 11 is a schematic structural diagram of the discharge plate in embodiment 1 with four rods placed and the fourth rod not pushed in place.

Fig. 12 is a schematic structural view of the discharge plate in embodiment 1 with four rods placed and the fourth rod pushed in place.

FIG. 13 is a schematic structural view of embodiment 2.

FIG. 14 is a sectional view at a conveyor belt in accordance with embodiment 2.

FIG. 15 is a partial schematic view of embodiment 2.

Fig. 16 is a sectional view of embodiment 2 at the follower.

Fig. 17 is a schematic structural view of a frame body in the related art.

Description of reference numerals: 1. a feed assembly; 2. welding a platform; 3. a material placing plate; 4. a welding robot; 5. a frame; 6. a guide rail; 7. a first driving member; 8. a second driving member; 9. a first cutting member; 10. a second cutting member; 11. accommodating grooves; 12. a push block; 13. a screw rod; 14. a drive motor; 15. a slider; 16. a chute; 17. a drive cylinder; 18. an electromagnet block; 19. a first hydraulic cylinder; 20. a second hydraulic cylinder; 21. a first through groove; 22. a second through groove; 23. a third driving member; 24. a fourth drive; 25. a groove; 26. a transmission belt; 27. a driving wheel; 28. a linkage mechanism; 29. a first gear; 30. accommodating grooves; 31. a second gear; 32. a driven member; 33. a driving wheel; 34. a third gear; 35. a driven wheel; 36. a secondary rack; 37. a linkage belt; 38. a rod body; 39. a frame body.

Detailed Description

The present application is described in further detail below with reference to figures 1-17.

Example 1:

the embodiment of the application discloses a welding device. Referring to fig. 1, a welding apparatus includes a feeding assembly 1, a welding stage 2, a discharging plate 3, a driving assembly, and a welding robot 4. Feeding component 1 cuts the section bar into body of rod 38 and carries on welding platform 2's blowing board 3, then carries welding robot 4 below with blowing board 3 through drive assembly, welds into framework 39 through welding robot 4 with the body of rod 38 that the concatenation is good at last.

In particular, with reference to fig. 1 and 2, the feeding assembly 1 comprises a frame 5, a guide rail 6, a first drive 7, a second drive 8, a first cutting member 9 and a second cutting member 10. The guide rail 6 is fixedly arranged on the frame 5. The guide rail 6 is provided with an accommodating groove 11 along the length direction of the guide rail, and the accommodating groove 11 is communicated with two ends of the guide rail 6. The housing groove 11 is used for placing the profile to be cut and the rods 38 that have not been transported to the welding platform 2 after cutting.

Referring to fig. 2 and 3, the first driving member 7 includes a push block 12, a lead screw 13, and a driving motor 14. The bottom surface has seted up spout 16 along its length direction in the holding tank 11, and the lower extreme of ejector pad 12 is connected with slider 15 of sliding connection in spout 16, and ejector pad 12 sliding connection is in holding tank 11. The screw rod 13 is arranged along the length direction of the sliding chute 16 and is in threaded connection with the sliding block 15, and the screw rod 13 is rotatably connected with the guide rail 6 through a bearing. The output end of the driving motor 14 is connected to the screw 13 and the body of the driving motor 14 is fixedly mounted on the frame 5. The lead screw 13 rotates to drive the pushing block 12 to slide along the accommodating groove 11, and the pushing block 12 has a driving force for the section bar and the rod body 38 in the accommodating groove 11, so that the rod body 38 can be smoothly pushed to the material placing plate 3.

Referring to fig. 1 and 2, the second driving member 8 includes a driving cylinder 17 provided on the frame 5 and an electromagnet block 18 fixedly mounted on an output end of the driving cylinder 17. In operation, after the rods 38 are fed along the guide rails 6 onto the material discharge plate 3, the electromagnet blocks 18 attract the rods 38, pull the rods 38 to the proper positions, and then the electromagnet blocks 18 lose magnetism and are driven by the driving cylinders 17 to leave the rods 38, so that the rods 38 are transported to the proper positions.

Referring to fig. 1 and 2, the first cutting member 9 and the second cutting member 10 are both cutting machines. The first cutting member 9 is slidably connected to the frame 5 along the inclined direction of the first inclined plane, a first hydraulic cylinder 19 is arranged at one end of the first cutting member 9, a cylinder body of the first hydraulic cylinder 19 is fixedly mounted on the frame 5, and a piston rod of the first hydraulic cylinder 19 is fixedly connected to the first cutting member 9. The first cutting part 9 is driven by the first hydraulic cylinder 19 to slide relative to the frame 5, so that the rod body 38 is cut. The guide rail 6 is provided with a first through groove 21 for the saw blade of the first cutting member 9 to pass through. The second cutting member 10 is slidably connected to the frame 5 along the inclined direction of the second inclined plane, a second hydraulic cylinder 20 is arranged at one end of the second cutting member 10, the cylinder body of the second hydraulic cylinder 20 is fixedly mounted on the frame 5, and the piston rod of the second hydraulic cylinder 20 is fixedly connected to the second cutting member 10. The second hydraulic cylinder 20 drives the second cutting member 10 to slide relative to the frame 5, so as to cut the rod body 38. The guide rail 6 is provided with a second through slot 22 for the saw blade of the second cutting member 10 to pass through.

Referring to fig. 1 and 4, the drive assembly includes a third drive member 23 and a fourth drive member 24. The fourth driving part 24 is a conveyor, and a plurality of welding platforms 2 are arranged along the feeding direction of the conveyor. A groove 25 is formed in the welding platform 2, and the third driving member 23 is a motor and is fixedly installed in the groove 25. Each welding platform 2 is provided with a corresponding discharging plate 3. The discharging plate 3 is rotatably connected to the welding platform 2, and the discharging plate 3 is connected to the output end of the third driving member 23 through a bevel gear set. The third driving member 23 can drive the discharging plate 3 to rotate relative to the welding platform 2.

The implementation principle of the welding device in the embodiment of the application is as follows:

1. placing the section bar into the accommodating groove 11, driving the first cutting piece 9 to slide relative to the rack 5 by the first hydraulic cylinder 19, and completing cutting one end of the section bar by matching with a saw blade rotating by the first cutting piece 9 to form a first inclined plane;

2. taking out the waste material;

3. the first driving piece 7 pushes the section bar to move forwards, and after the section bar moves to a certain position, the second hydraulic cylinder 20 drives the second cutting piece 10 to slide relative to the rack 5 and match with a saw blade rotating by the second cutting piece 10 to complete cutting of one end of the section bar to form a second inclined plane; a rod 38 has now been cut;

4. the pushing block 12 continues to drive the section bar to move forward, the rod body 38 is pushed to the discharging plate 3, and the rod body 38 is moved to a proper position, as shown in fig. 5;

5. the third driving member 23 drives the discharging plate 3 to rotate 90 degrees until reaching the position of fig. 6, and the fourth driving member 24 drives the discharging plate 3 to translate until reaching the position of fig. 7;

6. the push block 12 continues to drive the profile to move forward, the profile is cut by the first cutting piece 9, and a second rod body 38 is cut;

7. the pushing block 12 continues to drive the profile to move forward, the rod body 38 is pushed onto the discharging plate 3, and the rod body 38 is driven by the second driving piece 8 to move to a proper position, as shown in fig. 7;

8. the discharging plate 3 is driven to translate by the fourth driving piece 24 until the position of fig. 8 is reached;

9. the pushing block 12 continues to drive the profile to move forwards, the profile is cut through the second cutting piece 10, and a third rod body 38 is cut;

10. the pushing block 12 continues to drive the section bar to move forward, the rod body 38 is pushed to the discharging plate 3, and the rod body 38 is moved to a proper position, as shown in fig. 9;

11. the third driving member 23 drives the discharging plate 3 to rotate 90 degrees until reaching the position of fig. 10, and the fourth driving member 24 drives the discharging plate 3 to translate until reaching the position of fig. 10;

12. the pushing block 12 continues to drive the profile to move forward, the rod body 38 is pushed onto the discharging plate 3 until reaching the position shown in fig. 11, and the rod body 38 is driven by the second driving piece 8 to move to a proper position, as shown in fig. 12, so that the rod body 38 is spliced;

13. the discharging plate 3 is driven to the position below the welding robot 4 through the fourth driving piece 24, and welding is carried out.

Example 2:

the embodiment 2 differs from the embodiment 1 in that the first drive element 7 is different. Referring to fig. 13 and 14, the first driving member 7 includes a push block 12, a belt 26, a driving wheel 27, and a driving motor 14. The transmission belt 26 passes through the sliding chute 16 and is sleeved outside the guide rail 6, two transmission wheels 27 are arranged and are rotatably connected with the guide rail 6, and the two transmission wheels 27 tension the transmission belt 26. The output end of the driving motor 14 is connected to a driving wheel 27, and the body of the driving motor 14 is fixedly arranged on the frame 5.

The driving wheel 27 is driven by the driving motor 14 to rotate, so that the driving belt 26 moves, and the pushing block 12 is driven to slide along the receiving groove 11, so that the rod body 38 can be smoothly pushed onto the material placing plate 3.

With reference to fig. 13, between the first cutting member 9 and the drive wheel 27 there is a linkage 28, the linkage assembly being adapted to drive the first cutting member 9 to slide reciprocally with respect to the frame 5 as the profile is fed.

Referring to fig. 13 and 15, the linkage 28 comprises a first gear 29 coaxially connected to the drive wheel 27, a second gear 31 rotatably connected to the guide 6, a driven member 32 fixedly mounted below the first cutting member 9, and a force transmission assembly. The drive wheel 27 connected to the drive motor 14 is an incomplete gear and the drive belt 26 is a toothed belt. The first gear 29 and the second gear 31 are both bevel gears and are meshed with each other.

Referring to fig. 15 and 16, the driven member 32 is provided with a mounting groove 30, the upper end wall and the lower end wall of the mounting groove 30 are both provided with auxiliary racks 36, a third gear 34 is arranged in the mounting groove 30, and the third gear 34 is sequentially and respectively meshed with the two auxiliary racks 36 when rotating. The force transmission assembly comprises a driving wheel 33 coaxially connected with the second gear 31, a driven wheel 35 coaxially connected with the third gear 34, and a linkage belt 37 connected with the driven wheel 35 and the driving wheel 33, wherein the linkage belt 37 is sleeved outside the driving wheel 33 and the driven wheel 35 and is tensioned by the driving wheel 33 and the driven wheel 35.

During the rotation of the transmission wheel 27, the first gear 29 rotates, which in turn rotates the second gear 31 and the third gear 34. When the third gear 34 is engaged with the sub-rack 36 on the upper end surface of the mounting groove 30, the follower 32 moves in a direction approaching the guide rail 6. When the third gear 34 is engaged with the sub-rack 36 on the lower end surface of the mounting groove 30, the follower 32 moves in a direction away from the guide rail 6. Thereby achieving a reciprocating movement of the first cutting member 9.

The transmission wheel 27 rotates to drive the transmission belt 26 intermittently. So that the profile is in a state of rest when the first cutting member 9 cuts the profile. The sectional material can be cut more stably and smoothly.

Similarly, with reference to figure 13, a linkage 28 is also provided between the second cutting member 10 and the drive wheel 27, which linkage is adapted to drive the second cutting member 10 to slide back and forth with respect to the frame 5 as the profile is fed. The design can finish the cutting of the first cutting part 9 and the second cutting part 10 to the section without adding extra driving sources, namely the first hydraulic cylinder 19 and the second hydraulic cylinder 20, and the energy is saved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A welding device, characterized by: comprises that

The material placing plate (3), the material placing plate (3) is used for placing the rod body (38);

the welding platform (2), the welding platform (2) is used for placing the material placing plate (3);

the welding robot (4) is positioned at one end of the welding platform (2) and used for welding and splicing the rod body (38) on the material discharging plate (3);

the feeding assembly (1) comprises a rack (5), a guide rail (6) provided with a containing groove (11) and used for containing a profile, a first driving piece (7) used for driving the profile to move along the length direction of the containing groove (11) on the guide rail (6), a first cutting piece (9) used for cutting the profile to form a first inclined surface of a rod body (38), a second cutting piece (10) used for cutting the profile to form a second inclined surface of the rod body (38), and a second driving piece (8) used for driving the rod body (38) formed after the profile is cut to move to a material placing plate (3) along the length direction of the containing groove (11) on the guide rail (6);

the driving assembly comprises a third driving piece (23) used for driving the discharging plate (3) to rotate and a fourth driving piece (24) used for driving the discharging plate (3) to slide on the welding platform (2), and the sliding direction of the discharging plate (3) relative to the welding platform (2) is perpendicular to the sliding direction of the rod body (38) relative to the guide rail (6).

2. A welding device according to claim 1, characterized in that: the first cutting piece (9) is connected to the rack (5) in a sliding mode along the inclination direction of the first inclined plane, a first through groove (21) for the first cutting piece (9) to pass through is formed in the guide rail (6), the second cutting piece (10) is connected to the rack (5) in a sliding mode along the inclination direction of the second inclined plane, and a second through groove (22) for the second cutting piece (10) to pass through is formed in the guide rail (6); the first cutting piece (9) and the second cutting piece (10) alternately cut the section.

3. A welding device according to claim 2, characterized in that: first driving piece (7) are including ejector pad (12), lead screw (13) and driving motor (14), spout (16) have been seted up to the bottom surface in holding tank (11), and ejector pad (12) lower extreme is connected with slider (15) of sliding connection in spout (16), and ejector pad (12) sliding connection is in holding tank (11), and lead screw (13) set up and threaded connection in slider (15) along spout (16) length direction, and lead screw (13) rotate to be connected in guide rail (6), driving motor (14) are used for driving lead screw (13) and rotate.

4. A welding device according to claim 2, characterized in that: first driving piece (7) are including ejector pad (12), drive belt (26), drive wheel (27) and driving motor (14), spout (16) have been seted up to bottom surface in holding tank (11), ejector pad (12) lower extreme is connected with slider (15) of sliding connection in spout (16), ejector pad (12) sliding connection is in holding tank (11), outside guide rail (6) were located in spout (16) and the cover was passed in drive belt (26), drive wheel (27) are equipped with two and rotate and connect in guide rail (6), two drive wheel (27) tensioning drive belt (26), driving motor (14) are used for ordering about drive wheel (27) and rotate.

5. A welding device according to claim 4, characterized in that: a linkage mechanism (28) is arranged between the first cutting piece (9) and the driving wheel (27), and the linkage assembly is used for driving the first cutting piece (9) to slide in a reciprocating manner relative to the machine frame (5) along with the feeding of the section.

6. A welding device according to claim 5, characterized in that: the linkage mechanism (28) comprises a first gear (29) coaxially connected with the transmission wheel (27), a second gear (31) meshed with the first gear (29), a driven piece (32) fixedly installed below the first cutting piece (9) and a force transmission assembly, wherein the first gear (29) and the second gear (31) are both bevel gears, an installation groove (30) is formed in the driven piece (32), auxiliary racks (36) are arranged on the upper end wall and the lower end wall of the installation groove (30), a third gear (34) is arranged in the installation groove (30), the third gear (34) is sequentially meshed with the two auxiliary racks (36) respectively when rotating, and the force transmission assembly is used for transmitting a rotating pair of the second gear (31) to the third gear (34).

7. A welding device according to claim 6, characterized in that: the driving wheel (27) connected with the driving motor (14) is an incomplete gear, and the driving belt (26) is a toothed belt.

8. A welding device as defined in claim 7, characterized in that: the force transmission assembly comprises a driving wheel (33) coaxially connected to the second gear (31), a driven wheel (35) coaxially connected to the third gear (34), and a linkage belt (37) connected with the driven wheel (35) and the driving wheel (33), wherein the linkage belt (37) is sleeved outside the driving wheel (33) and the driven wheel (35) and is tensioned by the driving wheel (33) and the driven wheel (35).

9. A welding device according to claim 1, characterized in that: the fourth driving part (24) is a conveyor, and the welding platforms (2) are provided with a plurality of parts along the feeding direction of the conveyor.

10. A welding process, characterized in that: welding with a welding device according to any one of claims 1-9, comprising the steps of,

s1, cutting the section bar in the guide rail (6) through the first cutting piece (9) and the second cutting piece (10) to form the section bar;

s2, pushing the rod body (38) to the discharging plate (3) and splicing the rod body and the discharging plate (3) into a frame body (39);

s3, moving the material discharging plate (3) to the position below the welding robot (4);

s3, the welding robot (4) welds the frame body (39) on the material discharging plate (3).