Welding device and technology for inner wall and outer wall of forklift portal frame

Abstract

The invention discloses a forklift portal inner and outer wall welding device and process, and belongs to the field of forklift portal welding, the forklift portal inner and outer wall welding device comprises an outer wall welding fixing assembly and an inner wall welding fixing assembly, the inner wall welding fixing assembly comprises a first mounting seat and a second mounting seat which are oppositely arranged, and rotating seats are rotationally mounted on the opposite side faces of the first mounting seat and the second mounting seat; a rotating table used for containing a forklift portal is fixed between the two rotating bases, fixing pieces used for fixing the forklift portal are arranged on the two rotating bases, a motor is fixed to the side face, away from the second mounting base, of the first mounting base, an output shaft of the motor is fixedly connected with the side wall of one rotating base, and a channel is formed in the side face of the second mounting base. A control table is arranged on the side, away from the first mounting base, of the second mounting base, a mechanical arm is arranged on the control table, a welding gun is arranged at the end, away from the control table, of the mechanical arm, and the mechanical arm can penetrate through the channel to be inserted into the forklift portal. The forklift portal frame welding device has the effect of improving the forklift portal frame welding efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of forklift door frame welding, and in particular to a forklift door frame inner and outer wall welding device and process. Background Art

[0002] Forklifts are industrial handling vehicles, which refer to various wheeled handling vehicles for loading and unloading, stacking and short-distance transportation of palletized goods. The mechanism of the forklift to lift goods is also called the gantry. During the production process of the gantry, the gantry welding production is usually done by manual welding or welding robot workstation welding.

[0003] During the welding process of the forklift mast, the four sides need to be welded together on both the inside and outside. However, when welding on the inside, it is often necessary to manually enter the narrow channel where the four parts are spliced ​​to complete the welding. Due to the narrow space in the channel, welding is extremely inconvenient, thereby reducing the welding efficiency of the forklift mast. Summary of the invention

[0004] In order to improve the problem that welding is extremely inconvenient due to the narrow space in the forklift mast channel, thereby reducing the welding efficiency of the forklift mast, the present application provides a forklift mast inner and outer wall welding device and process.

[0005] In the first aspect, the present application provides a forklift mast inner and outer wall welding device adopts the following technical solution: A forklift gantry inner and outer wall welding device, comprising an outer wall welding fixing component and an inner wall welding fixing component, the inner wall welding fixing component comprising a mounting seat 1 and a mounting seat 2 which are arranged opposite to each other, and rotating seats are rotatably installed on the opposite sides of the mounting seat 1 and the mounting seat 2, and a rotating table for placing the forklift gantry is fixed between the two rotating seats, and fixing parts for fixing the forklift gantry are arranged on the two rotating seats, a motor is fixed on the side of the mounting seat 1 away from the mounting seat 2, and the output shaft of the motor is fixedly connected to the side wall of one of the rotating seats, a channel is opened on the side of the mounting seat 2, and the channel runs through the rotating seat, a control console is arranged on the side of the mounting seat 2 away from the mounting seat 1, a mechanical arm is arranged on the control console, and the control console is used to control the movement of the mechanical arm, and a welding gun is arranged on the end of the mechanical arm away from the control console, and the mechanical arm can pass through the channel and be inserted into the forklift gantry.

[0006] By adopting the above technical solution, the forklift mast components are first assembled and fixed by welding the fixing components on the outer wall. After the forklift mast components are assembled and fixed, the staff will use welding equipment to spot weld the joints of the forklift mast components, and then move the forklift mast to the rotating table, fix the forklift mast on the rotating table by fixing parts, start the motor, the output shaft of the motor drives the mounting seat to rotate, the mounting seat drives the rotating table to rotate, so that the rotating table drives the forklift mast to rotate, and then operate the console so that the console controls the mechanical arm to pass through the channel and extend into the Inside the forklift mast, weld the internal gap between the two parts. After welding one side seam, start the motor to make the rotating table drive the forklift mast to rotate until all four side seams inside the forklift mast are welded. Then operate the console to control the mechanical arm to exit the channel, start the motor again, make the rotating table drive the forklift mast to rotate to a horizontal state, and complete the welding of the forklift mast, thereby avoiding the problem of inconvenience in welding the internal connecting side seams of the forklift mast due to the narrow internal channel of the forklift mast, thereby improving the welding efficiency of the forklift mast.

[0007] Preferably, the fixing member includes a support seat fixed on the two opposite sides of the rotating seat, a pressure block is arranged below the support seat, a cylinder is fixed on both sides of the top surface of the support seat, the bottom end of the cylinder piston rod passes through the support seat and is fixed to the top surface of the pressure block, and the cylinder piston rod is slidably connected to the support seat vertically.

[0008] By adopting the above technical solution, when the forklift mast after spot welding is moved to the rotating table, the cylinder is started, and the piston rod of the cylinder drives the pressure block to move downward, so that the bottom surface of the pressure block abuts against the top surface of the forklift mast, thereby pressing the forklift mast onto the rotating table.

[0009] Preferably, the outer wall welding fixing assembly includes a base, a plurality of mounting brackets are arranged on both sides of the top surface of the base, and the plurality of mounting brackets are arranged at equal intervals along the length direction of the base, a fixing plate is arranged on the inner side of the mounting bracket, a push rod is passed through the side of the mounting bracket close to the fixing plate, the push rod is threadedly connected to the mounting bracket, and one end of the push rod close to the fixing plate is rotatably installed on the side of the fixing plate close to the mounting bracket.

[0010] By adopting the above technical solution, when the forklift mast is spliced ​​on the base, the top rods on the mounting frames on both sides of the top surface of the base are rotated respectively, so that the top rods drive the fixing plate to move toward the direction close to the forklift mast, so that the fixing plate is pressed against the forklift mast, thereby fixing the forklift mast components on the base, which is convenient for spot welding of the forklift mast.

[0011] Preferably, a guide rod is fixed to the side of the fixing plate close to the mounting frame, a guide hole is opened on the side of the mounting frame close to the fixing plate, and the guide rod passes through the guide hole.

[0012] By adopting the above technical solution, when the push rod is rotated and the push rod drives the fixed plate to move, the fixed plate also drives the guide rod to move, so that the fixed plate is more stable when moving.

[0013] Preferably, a rotating handle is provided at one end of one of the push rods away from the fixed plate, a clamping block is fixed at one end of the push rod away from the fixed plate, a clamping slot is provided on the side of the rotating handle, and the clamping block is inserted into the clamping slot.

[0014] By adopting the above technical solution, when the push rod is rotated, the rotating handle is inserted into the clamping block through the clamping slot, and then the rotating handle is rotated, the rotating handle drives the clamping block to rotate, and the clamping block drives the push rod to rotate, thereby facilitating the rotation of the push rod.

[0015] Preferably, it also includes a plurality of clamp assemblies, the clamp assemblies include a load-bearing seat, a plurality of clamping rings are arranged on the load-bearing seat, the plurality of clamping rings are sequentially connected end to end to form a circle, the inner side surface of the clamping ring is a plane, and a connecting piece for fixing the two adjacent clamping rings is arranged between two adjacent clamping rings.

[0016] By adopting the above technical solution, after the internal side seam welding of the forklift mast is completed, the forklift mast is moved to the clamping ring on the load-bearing seat, and then the forklift mast is placed on the load-bearing seat by fixing the multiple clamping rings end to end through connecting pieces, thereby facilitating the welding of the internal components of the forklift mast.

[0017] Preferably, two parallel rotating rollers are rotatably mounted between the opposite inner side surfaces of the load-bearing seat, and the clamping ring can rotate on the two rotating rollers.

[0018] By adopting the above technical solution, when the forklift mast is placed on the load-bearing seat through the clamping ring, the clamping ring drives the forklift mast to rotate by rotating the clamping ring, and the angle of the forklift mast is adjusted, thereby facilitating the welding of internal components at a suitable angle.

[0019] Preferably, connecting plates are fixed at both ends of the two side surfaces of the two adjacent clamping rings, and through holes are opened on the side surfaces of the connecting plates. The connecting parts include bolts, which pass through the through holes on the two adjacent connecting plates in sequence. Nuts are sleeved on the bolts, and the nuts are threadedly connected to the bolts.

[0020] By adopting the above technical solution, multiple clamping rings are connected end to end to clamp the forklift mast, and then the bolts are passed through the through holes on the two adjacent connecting plates, and then the nuts are sleeved on the bolts, and the nuts are rotated to make the nuts abut against the connecting plates, thereby fixing the connecting plates on the two adjacent clamping rings.

[0021] In a second aspect, the present application provides a method for welding the inner and outer walls of a forklift mast, which adopts the following technical solution: A method for welding inner and outer walls of a forklift door frame, comprising the following steps: S1: Fix the forklift mast through the outer wall welding fixing assembly, and spot weld the outer wall of the forklift mast; S2: Move the forklift mast after spot welding to the rotating table, and then drive the forklift mast to rotate through the rotating table, adjust the welding angle of the inner wall side seam of the forklift mast, and then control the mechanical arm through the console to drive the welding gun to move to the inside of the forklift mast to weld the inner wall side seam of the forklift mast; S3: After the welding of the inner wall seam of the forklift is completed, the forklift mast is driven to rotate by the rotating table to weld the outer wall seam of the forklift mast; S4: After the inner and outer walls of the forklift mast are welded, the mast is moved to the fixture assembly. The clamping ring is rotated to drive the mast to rotate, and the angle of the mast is adjusted to facilitate welding of the internal components at a suitable angle.

[0022] By adopting the above technical solution, In summary, the present application includes at least one of the following beneficial technical effects: 1. First, the forklift mast components are assembled and fixed by welding the outer wall fixing components. When the forklift mast components are assembled and fixed, the staff spot welds the joints of the forklift mast components by using welding equipment, and then moves the forklift mast to the rotating table, fixes the forklift mast on the rotating table by fixing parts, starts the motor, and the output shaft of the motor drives the mounting seat to rotate, and the mounting seat drives the rotating table to rotate, so that the rotating table drives the forklift mast to rotate 45 degrees, and then operates the console to control the mechanical arm of the console to pass through the channel and extend into the interior of the forklift mast to weld the internal gap of the two components. After welding one side seam, start the motor again to drive the rotating table to rotate the forklift mast 45 degrees until all four side seams inside the forklift mast are welded, and then operate the console to control the mechanical arm of the console to exit the channel, and then start the motor to drive the forklift mast to rotate to a horizontal state to complete the welding of the forklift mast, thereby avoiding the problem that the internal channel of the forklift mast is narrow and it is inconvenient to weld the internal connection side seams of the forklift mast, thereby improving the welding efficiency of the forklift mast; 2. When the forklift mast is spliced ​​on the base, rotate the top rods on the mounting frames on both sides of the top surface of the base respectively, so that the top rods drive the fixing plate to move towards the direction close to the forklift mast, so that the fixing plate presses against the forklift mast, thereby fixing the forklift mast components on the base, which is convenient for spot welding of the forklift mast; 3. After the internal side seam welding of the forklift mast is completed, move the forklift mast to the clamping ring on the load-bearing seat, and then fix the multiple clamping rings end to end through connectors, and place the forklift mast on the load-bearing seat, so as to facilitate the welding of the internal components of the forklift mast. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the outer wall welding fixing assembly in an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the structure of the inner wall welding fixing assembly in an embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the structure of the clamp assembly in an embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the clamping ring structure in an embodiment of the present application.

[0027] Figure numerals: 1. Outer wall welding fixing assembly; 11. Base; 12. Mounting frame; 13. Fixing plate; 14. Push rod; 15. Block; 16. Turning handle; 17. Slot; 18. Guide rod; 19. Guide slot; 2. Inner wall welding fixing assembly; 21. Mounting seat 1; 22. Mounting seat 2; 23. Rotating seat; 24. Rotating table; 25. Motor; 26. Support seat; 27. Press block; 28. Cylinder; 3. Control console; 31. Robot arm; 32. Welding gun; 33. Channel; 4. Clamp assembly; 41. Load-bearing seat; 42. Rotating roller; 43. Clamping ring; 44. Connecting plate; 45. Through hole; 46. Bolt; 47. Nut. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] The embodiment of the present application discloses a device for welding inner and outer walls of a forklift mast.

[0030] Reference Figure 1 and Figure 2A forklift mast inner and outer wall welding device comprises an outer wall welding fixing assembly 1 and an inner wall welding fixing assembly 2. The outer wall welding fixing assembly 1 comprises a base 11, a plurality of mounting frames 12 are fixed on both sides of the top surface of the base 11, and the plurality of mounting frames 12 are arranged at equal intervals along the length direction of the base 11, a fixing plate 13 is arranged on the inner side of the mounting frame 12, a push rod 14 is rotatably installed on the side of the fixing plate 13 close to the mounting frame 12, and the end of the push rod 14 away from the fixing plate 13 passes through the mounting frame 12, and the push rod 14 is threadedly connected to the mounting frame 12. A clamping block 15 is fixed on the end of the push rod 14 away from the fixing plate 13, a turning handle 16 is arranged on the side of one of the push rods 14 away from the fixing plate 13, a clamping slot 17 is provided on the side of the turning handle 16, the clamping slot 17 passes through the turning handle 16, and the clamping block 15 is inserted into the clamping slot 17. Guide rods 18 are fixed to the top and bottom ends of the side of the fixing plate 13 close to the mounting frame 12. Two guide grooves 19 are provided on the side of the mounting frame 12 close to the fixing plate 13. The ends of the two guide rods 18 away from the fixing plate 13 pass through the two guide grooves 19 respectively.

[0031] When welding the inner and outer walls of the forklift mast, first place the forklift mast on the base 11 for splicing, then put the handle 16 on the clamping block 15, rotate the handle 16, and the handle 16 drives the push rod 14 to rotate, so that the push rod 14 drives the fixed plate 13 to move toward the direction close to the forklift mast, so that the fixed plates 13 on both sides of the top surface of the base 11 fix the spliced ​​forklift mast on the base 11, so that it is convenient for the staff to spot weld the connection of the forklift mast.

[0032] Reference Figure 2 and Figure 3 The inner wall welding fixing assembly 2 includes a mounting seat 1 21 and a mounting seat 22 which are arranged opposite to each other. The sides of the mounting seat 1 21 and the mounting seat 2 22 which are close to each other are both rotatably mounted with a rotating seat 23. A rotating table 24 is fixed between the two rotating seats 23. A motor 25 is fixed to the side of the mounting seat 1 21 which is away from the mounting seat 22. The output shaft of the motor 25 is fixedly connected to the side of one of the rotating seats 23. A supporting seat 26 is fixed to the sides of the two rotating seats 23 which are close to each other. The top surface of the supporting seat 26 is fixed to the top surface of the rotating seat 23. A pressing block 27 is arranged below the supporting seat 26. A cylinder 28 is fixed to both sides of the top surface of the supporting seat 26. The bottom end of the piston rod of the cylinder 28 passes through the supporting seat 26. The piston rod of the cylinder 28 is vertically slidably connected to the supporting seat 26. The bottom end of the piston rod of the cylinder 28 is fixed to the top surface of the pressing block 27.

[0033] Reference Figure 2A control console 3 is provided on the side of the second mounting seat 22 away from the first mounting seat 21. A mechanical arm 31 is fixed on the side of the control console 3 close to the second mounting seat 22. The control console 3 is used to control the extension and retraction of the mechanical arm 31. A welding gun 32 is fixed on one end of the mechanical arm 31 close to the second mounting seat 22. A channel 33 is provided on the side of the second mounting seat 22 close to the control console 3. The channel 33 runs through the second mounting seat 22 and the support seat 26. The mechanical arm 31 can pass through the channel 33.

[0034] After the spot welding of the outer wall connection of the forklift gantry is completed, the forklift gantry is moved to the rotating table 24, and then the cylinder 28 is started. The piston rod of the cylinder 28 drives the pressing block 27 to move downward, so that the bottom surface of the pressing block 27 abuts against the top surface of the forklift gantry, thereby pressing the forklift gantry on the rotating table 24. Then the motor 25 is started, and the output shaft of the motor 25 drives the support seat 26 to rotate, and the support seat 26 drives the rotating table 24 to rotate, so that the rotating table 24 drives the forklift door to rotate 45 degrees, and then the mechanical arm 31 is controlled by the console 3, so that the mechanical arm 31 passes through the channel 33 and extends into the forklift gantry, so that the welding gun 32 on the mechanical arm 31 welds the side seams connecting the inner wall of the forklift gantry. After welding one of the side seams, the motor 25 is started again, so that the rotating table 24 drives the forklift gantry to rotate another 45 degrees, and the welding gun 32 welds another side seam of the inner wall of the forklift gantry, until the welding of the four side seams of the inner wall of the forklift gantry is completed.

[0035] Reference Figure 3 and Figure 4 , further comprising a plurality of clamp assemblies 4, the clamp assemblies 4 comprising a bearing seat 41, a rotating roller 42 is rotatably mounted between the opposite inner sides of the bearing seat 41, and the two rotating rollers 42 are arranged parallel to each other. A plurality of clamping rings 43 are arranged on the two rotating rollers 42, the inner sides of the clamping rings 43 are planes, and the plurality of clamping rings 43 are connected end to end in sequence to form a circle. The clamping rings 43 connected end to end in sequence can rotate on the two rotating rollers 42. Connecting plates 44 are fixed at both ends of the two side surfaces of the clamping rings 43, and through holes 45 are provided on the side surfaces of the connecting plates 44, and bolts 46 are sequentially penetrated through the through holes 45 on the two adjacent connecting plates 44 on the two adjacent clamping rings 43, and nuts 47 are sleeved on the bolts 46, and the nuts 47 abut against one of the connecting plates 44.

[0036] Place one of the clamping rings 43 on the two rotating rollers 42, then move the forklift mast onto the clamping ring 43, then splice the remaining clamping rings 43 with the clamping ring 43 on the rotating roller 42, then pass the bolt 46 through the through hole 45 on the two adjacent connecting plates 44, then put the nut 47 on the bolt 46, rotate the nut 47, so that the nut 47 abuts against one of the connecting plates 44, thereby fixing the two adjacent clamping rings 43 in connection, so that multiple clamping rings 43 clamp the forklift mast, and then facilitate rotating the clamping ring 43 when welding the internal components of the forklift mast, so that the clamping ring 43 drives the forklift mast to rotate, adjust the angle of the forklift mast, and facilitate welding the internal components at a suitable angle.

[0037] The implementation principle of the inner and outer wall welding device of a forklift mast in an embodiment of the present application is as follows: first, the forklift mast components are placed on the base 11 for assembly, and then the turning handle 16 is respectively sleeved on the clamping blocks 15 on both sides of the top surface of the base 11, and the turning handle 16 is rotated to make the turning handle 16 drive the clamping blocks 15 to rotate, and the clamping blocks 15 drive the push rod 14 to rotate, so that the push rod 14 drives the fixed plate 13 to move in the direction close to the forklift mast, so that the fixed plates 13 on both sides of the top surface of the base 11 fix the assembled forklift door panels on the base 11, and then the staff spot welds the connection points of the forklift mast components by using welding equipment. Then, the spot-welded forklift mast is moved onto the rotating table 24, and the cylinder 28 is started. The piston rod of the cylinder 28 drives the pressure block 27 to move downward, so that the forklift mast with the pressure block 27 is pressed against the rotating table 24, and the motor 25 is started. The output shaft of the motor 25 drives the rotating seat 23 to rotate, and the rotating seat 23 drives the rotating table 24 to rotate, so that the rotating table 24 drives the forklift mast to rotate 45 degrees, and then the control console 3 is operated to control the mechanical arm 31 to pass through the channel 33 and extend into the interior of the forklift mast, so that the welding gun 32 welds the side seams of the inner wall of the forklift mast. After welding one side seam, the motor 25 is started again, so that the rotating table 24 drives the forklift mast to rotate 45 degrees, until all four side seams inside the forklift mast are welded. Then operate the control console 3 to control the mechanical arm 31 to exit the channel 33, and then start the motor 25 to make the rotating table 24 drive the forklift mast to rotate to a horizontal state. Then the staff welds the side seams of the outer wall of the forklift mast through the welding gun 32 to complete the welding of the forklift mast, thereby avoiding the problem that the internal channel 33 of the forklift mast is narrow and it is inconvenient to weld the internal connection side seams of the forklift mast, thereby improving the welding efficiency of the forklift mast.

[0038] The present application also discloses a method for welding inner and outer walls of a forklift mast, comprising the following steps: S1: Fix the forklift mast through the outer wall welding fixing assembly 1, and spot weld the outer wall of the forklift mast; S2: Move the forklift mast after spot welding onto the rotating table 24, and then drive the forklift mast to rotate through the rotating table 24, adjust the welding angle of the inner wall side seam of the forklift mast, and then control the mechanical arm 31 through the console 3, so that the mechanical arm 31 drives the welding gun 32 to move to the inside of the forklift mast to weld the inner wall side seam of the forklift mast; S3: After the welding of the side seams of the inner wall of the forklift is completed, the forklift mast is driven to rotate by the rotating table 24 to weld the side seams of the outer wall of the forklift mast; S4: After the inner and outer walls of the forklift mast are welded, the forklift mast is moved onto the clamp assembly 4, and the clamp ring 43 is rotated to drive the forklift mast to rotate, and the angle of the forklift mast is adjusted to facilitate welding of the internal components at a suitable angle.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A forklift mast inner and outer wall welding device, characterized in that: The invention comprises an outer wall welding fixing assembly (1) and an inner wall welding fixing assembly (2), wherein the inner wall welding fixing assembly (2) comprises a mounting seat 1 (21) and a mounting seat 2 (22) which are arranged opposite to each other, a rotating seat (23) is rotatably mounted on the opposite sides of the mounting seat 1 (21) and the mounting seat 2 (22), a rotating table (24) for placing a forklift door frame is fixed between the two rotating seats (23), and fixing parts for fixing the forklift door frame are arranged on the two rotating seats (23), and a motor (25) is fixed on the side of the mounting seat 1 (21) away from the mounting seat 2 (22), and the motor (25) ) is fixedly connected to the side wall of one of the rotating seats (23); a channel (33) is provided on the side of the second mounting seat (22); the channel (33) passes through the rotating seat (23); a control console (3) is provided on the side of the second mounting seat (22) away from the first mounting seat (21); a mechanical arm (31) is provided on the control console (3); the control console (3) is used to control the movement of the mechanical arm (31); a welding gun (32) is provided on the end of the mechanical arm (31) away from the control console (3); the mechanical arm (31) can pass through the channel (33) and be inserted into the forklift door frame.

2. A forklift mast inner and outer wall welding device according to claim 1, characterized in that: The fixing member comprises a support seat (26) fixed on opposite sides of the two rotating seats (23); a pressure block (27) is arranged below the support seat (26); a cylinder (28) is fixed on both sides of the top surface of the support seat (26); the bottom end of the piston rod of the cylinder (28) passes through the support seat (26) and is fixed to the top surface of the pressure block (27); the piston rod of the cylinder (28) is slidably connected to the support seat (26) in the vertical direction.

3. The forklift mast inner and outer wall welding device according to claim 1, characterized in that: The outer wall welding fixing assembly (1) comprises a base (11), a plurality of mounting frames (12) are arranged on both sides of the top surface of the base (11), and the plurality of mounting frames (12) are arranged at equal intervals along the length direction of the base (11); a fixing plate (13) is arranged on the inner side of the mounting frame (12); a push rod (14) is passed through the side of the mounting frame (12) close to the fixing plate (13); the push rod (14) is threadedly connected to the mounting frame (12); and one end of the push rod (14) close to the fixing plate (13) is rotatably mounted on the side of the fixing plate (13) close to the mounting frame (12).

4. A forklift mast inner and outer wall welding device according to claim 3, characterized in that: A guide rod (18) is fixed to the side of the fixing plate (13) close to the mounting frame (12), and a guide hole is opened on the side of the mounting frame (12) close to the fixing plate (13), and the guide rod (18) passes through the guide hole.

5. The forklift mast inner and outer wall welding device according to claim 1, characterized in that: A rotating handle (16) is provided at one end of one of the push rods (14) away from the fixing plate (13); a clamping block (15) is fixed to the end of the push rod (14) away from the fixing plate (13); a clamping groove (17) is provided on the side of the rotating handle (16); and the clamping block (15) is inserted into the clamping groove (17).

6. The forklift mast inner and outer wall welding device according to claim 1, characterized in that: The invention also comprises a plurality of clamp assemblies (4), wherein the clamp assemblies (4) comprise a load-bearing seat (41), a plurality of clamping rings (43) being arranged on the load-bearing seat (41), the plurality of clamping rings (43) being connected end to end in sequence to form a circle, the inner side surface of the clamping ring (43) being a plane, and a connecting piece for fixing the two adjacent clamping rings (43) being arranged between two adjacent clamping rings (43).

7. The forklift mast inner and outer wall welding device according to claim 6, characterized in that: Two parallel rotating rollers (42) are rotatably mounted between the opposite inner side surfaces of the load-bearing seat (41), and the clamping ring (43) can rotate on the two rotating rollers (42).

8. The forklift mast inner and outer wall welding device according to claim 6, characterized in that: Connecting plates (44) are fixed at both ends of the two adjacent side surfaces of the clamping rings (43), and through holes (45) are provided on the side surfaces of the connecting plates (44). The connecting member comprises bolts (46), and the bolts (46) pass through the through holes (45) on the two adjacent connecting plates (44) in sequence. Nuts (47) are sleeved on the bolts (46), and the nuts (47) are threadedly connected to the bolts (46).

9. A method for welding inner and outer walls of a forklift mast, according to a device for welding inner and outer walls of a forklift mast according to any one of claims 1 to 8, characterized in that: The steps include: S1: Fixing the forklift mast through the outer wall welding fixing assembly (1), and spot welding the outer wall of the forklift mast; S2: moving the forklift mast after spot welding onto a rotating table (24), then driving the forklift mast to rotate via the rotating table (24), adjusting the welding angle of the inner wall side seam of the forklift mast, and then controlling the mechanical arm (31) via the control console (3) so that the mechanical arm (31) drives the welding gun (32) to move to the inside of the forklift mast to weld the inner wall side seam of the forklift mast; S3: After the welding of the side seams of the inner wall of the forklift is completed, the forklift mast is driven to rotate by the rotating table (24) to weld the side seams of the outer wall of the forklift mast; S4: After the inner and outer walls of the forklift mast are welded, the forklift mast is moved onto the clamp assembly (4), and the clamp ring (43) is rotated to drive the forklift mast to rotate, thereby adjusting the angle of the forklift mast, so as to facilitate welding of the internal components at a suitable angle.

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