Forklift mast inner and outer wall welding device and process

Abstract

The application discloses a forklift mast inner and outer wall welding device and process, belongs to the forklift mast welding field, including outer wall welding fixed component and inner wall welding fixed component, the inner wall welding fixed component includes the installation seat one and the installation seat two which are oppositely arranged, the opposite sides of the installation seat one and the installation seat two are rotatably installed with the rotating seat, the rotating platform for placing the forklift mast is fixed between the two rotating seats, the two rotating seats are both provided with the fixing piece for fixing the forklift mast, the side of the installation seat one away from the installation seat two is fixed with the motor, the output shaft of the motor is fixedly connected with the side wall of one of the rotating seats, the side of the installation seat two is provided with the channel, the channel penetrates the rotating seat, the side of the installation seat two away from the installation seat one is provided with the control cabinet, the control cabinet is provided with the mechanical arm, the end of the mechanical arm away from the control cabinet is provided with the welding gun, and the mechanical arm can be inserted into the forklift mast through the channel. The application has the effect of improving the forklift mast welding efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forklift mast welding, in particular to a forklift mast inner and outer wall welding device and process. BACKGROUND

[0002] The forklift is an industrial handling vehicle, which refers to various wheeled handling vehicles for loading, unloading, stacking and short-distance transporting of piece pallet goods. The mechanism for lifting goods of the forklift is also called a mast. In the production process of the mast, the mast welding production is usually manually welded or welded by a welding robot workstation.

[0003] In the forklift mast welding process, four side surfaces need to be welded together on the inner and outer sides. However, when welding the inner side, it is often necessary for a worker to enter a narrow channel formed by the splicing of the four components to complete the welding. Since the space in the channel is narrow, the welding is extremely inconvenient, thereby reducing the forklift mast welding efficiency. SUMMARY

[0004] In order to improve the problem that the space in the forklift mast channel is narrow, the welding is extremely inconvenient, and the forklift mast welding efficiency is reduced, 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 adopting the following technical scheme:

[0006] A forklift mast inner and outer wall welding device, comprising an outer wall welding fixing assembly and an inner wall welding fixing assembly, the inner wall welding fixing assembly comprising oppositely arranged mounting seat one and mounting seat two, the opposite sides of the mounting seat one and the mounting seat two are both rotatably installed with rotating seats, a rotating table for placing a forklift mast is fixed between the two rotating seats, a fixing piece for fixing the forklift mast is arranged on each of the two rotating seats, a motor is fixed on the side of the mounting seat one away from the mounting seat two, the output shaft of the motor is fixedly connected with the side wall of one of the rotating seats, a channel is formed in the side of the mounting seat two, the channel penetrates through the rotating seat, a control console is arranged on the side of the mounting seat two away from the mounting seat one, a mechanical arm is arranged on the control console, the control console is used for controlling the movement of the mechanical arm, a welding gun is arranged on the end of the mechanical arm away from the control console, and the mechanical arm can be inserted into the forklift mast through the channel.

[0007] By adopting the technical scheme, firstly, the forklift mast components are assembled and fixed by the outer wall welding fixing assembly, when the forklift mast components are assembled and fixed, the staff uses the welding equipment to spot weld the connecting part of the forklift mast components, then moves the forklift mast to the rotating table, fixes the forklift mast on the rotating table through the fixing part, starts the motor, the output shaft of the motor drives the mounting seat one to rotate, the mounting seat one drives the rotating table to rotate, the rotating table drives the forklift mast to rotate, then operates the control console, the control console controls the mechanical arm to pass through the channel and extend into the forklift mast, and the internal gap of the two components is welded, after welding one edge joint, the motor is started again, the rotating table drives the forklift mast to rotate, until the four edge joints in the forklift mast are all welded, then the control console is operated again, the control console controls the mechanical arm to exit the channel, the motor is started again, the rotating table drives the forklift mast to rotate to the horizontal state, the welding of the forklift mast is completed, thereby avoiding the problem that the internal channel of the forklift mast is narrow and inconvenient for welding the internal connecting edge joint of the forklift mast, and the welding efficiency of the forklift mast is improved.

[0008] Preferably, the fixing part comprises a support seat fixed to the opposite sides of the rotating seat, a pressing block is arranged below the support seat, a gas cylinder is fixed to the top surface of the support seat on both sides, the bottom end of the piston rod of the gas cylinder is fixed to the top surface of the pressing block through the support seat, and the piston rod of the gas cylinder is in vertical sliding connection with the support seat.

[0009] By adopting the above technical scheme, when the spot-welded forklift mast is moved to the rotating table, the gas cylinder is started, the piston rod of the gas cylinder drives the pressing block to move downward, the bottom surface of the pressing block abuts against the top surface of the forklift mast, and the forklift mast is pressed on the rotating table.

[0010] Preferably, the outer wall welding fixing assembly comprises a base, a plurality of mounting frames are arranged on both sides of the top surface of the base, the mounting frames are arranged at equal intervals along the length direction of the base, a fixed plate is arranged on the inner side of the mounting frame, a jack is arranged on the side of the mounting frame close to the fixed plate, and the jack is in threaded connection with the mounting frame.

[0011] By adopting the above technical scheme, when the forklift mast is spliced on the base, the jacks on the mounting frames on both sides of the top surface of the base are rotated respectively, the jacks drive the fixed plates to move toward the direction close to the forklift mast, the fixed plates abut against the forklift mast, and the forklift mast components are fixed on the base, thereby facilitating spot welding of the forklift mast.

[0012] Preferably, a guide rod is fixed to the side of the fixing plate close to the mounting frame, and a guide hole is formed in the side of the mounting frame close to the fixing plate, and the guide rod passes through the guide hole.

[0013] By adopting the above technical scheme, when the jacking rod is rotated and the jacking rod drives the fixing plate to move, the fixing plate also drives the guide rod to move, so that the fixing plate moves more stably.

[0014] Preferably, one end of the jacking rod away from the fixing plate is provided with a handle, and a clamping block is fixed to the end of the jacking rod away from the fixing plate, and a clamping groove is formed in the side of the handle, and the clamping block is inserted into the clamping groove.

[0015] By adopting the above technical scheme, when the jacking rod is rotated, the handle is inserted on the clamping block through the clamping groove, and then the handle is rotated, the handle drives the clamping block to rotate, and the clamping block drives the jacking rod to rotate, so that the jacking rod is conveniently rotated.

[0016] Preferably, the clamp assembly further comprises a bearing seat, and a plurality of clamping rings are arranged on the bearing seat, and the plurality of clamping rings are sequentially connected in a circular shape, the inner side of the clamping ring is a plane, and a connecting piece is arranged between adjacent two clamping rings for fixedly connecting the adjacent two clamping rings.

[0017] By adopting the above technical scheme, when the internal seam welding of the forklift mast is completed, the forklift mast is moved to the clamping ring on the bearing seat, and then the forklift mast is placed on the bearing seat by fixedly connecting the plurality of clamping rings through the connecting pieces, so that the welding of the internal components of the forklift mast is facilitated.

[0018] Preferably, two parallel rotating rollers are rotatably installed between the opposite inner sides of the bearing seat, and the clamping ring can rotate on the two rotating rollers.

[0019] By adopting the above technical scheme, when the forklift mast is placed on the bearing seat through the clamping ring, the angle of the forklift mast is adjusted by rotating the clamping ring, so that the internal components are welded at a suitable angle.

[0020] Preferably, connecting plates are fixed to both sides of the two ends of the adjacent two clamping rings, a through hole is formed in the side of the connecting plate, the connecting piece comprises a bolt, the bolt passes through the through holes of the adjacent two connecting plates in sequence, a nut is sleeved on the bolt, and the nut is threadedly connected with the bolt.

[0021] By adopting the technical scheme, the multiple clamping rings are connected in a head-to-tail mode to clamp the forklift mast, then the bolt is passed through the through hole on the adjacent two connecting plates, the nut is sleeved on the bolt, the nut is rotated to abut against the connecting plate, and then the connecting plate on the adjacent two clamping rings is fixedly connected.

[0022] In a second aspect, the application provides a forklift mast inner and outer wall welding method, which adopts the following technical scheme:

[0023] A forklift mast inner and outer wall welding method comprises the following steps:

[0024] S1: The forklift mast is fixed by the outer wall welding fixing assembly, and the outer wall of the forklift mast is spot welded;

[0025] S2: The spot-welded forklift mast is moved to the rotating table, then the rotating table drives the forklift mast to rotate, the inner wall edge seam welding angle of the forklift mast is adjusted, then the mechanical arm is driven by the control console to move the welding gun to the inside of the forklift mast to weld the inner wall edge seam of the forklift mast;

[0026] S3: When the inner wall edge seam welding of the forklift is completed, the rotating table drives the forklift mast to rotate, and the outer wall edge seam of the forklift mast is welded;

[0027] S4: After the inner and outer wall welding of the forklift mast is completed, the forklift mast is moved to the clamp assembly, the clamping ring 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.

[0028] By adopting the technical scheme,

[0029] In summary, the application has at least one of the following beneficial technical effects:

[0030] 1. First, the forklift mast components are assembled and fixed by the outer wall welding fixing assembly, when the forklift mast components are assembled and fixed, the workers use welding equipment to spot weld the connection of the forklift mast components, then move the forklift mast to the rotating table, fix the forklift mast on the rotating table through the fixing part, start the motor, the output shaft of the motor drives the mounting seat one to rotate, the mounting seat one drives the rotating table to rotate, the rotating table drives the forklift mast to rotate 45 degrees, then operate the console, make the console control the mechanical arm to pass through the channel and enter the inside of the forklift mast, weld the internal gap of the two components spliced, after welding one edge seam, start the motor again, make the rotating table drive the forklift mast to rotate 45 degrees, until the four edge seams inside the forklift mast are all welded, then operate the console again, make the console control the mechanical arm to exit the channel, start the motor again, make the rotating table drive the forklift mast to rotate to the horizontal state, complete the welding of the forklift mast, thereby avoiding the problem that the internal channel of the forklift mast is narrow and inconvenient for welding the internal connecting edge seam of the forklift mast, and further improving the welding efficiency of the forklift mast;

[0031] 2. When the forklift mast is spliced on the base, the top rods on the two sides of the top surface of the base are respectively rotated, the top rods drive the fixed plates to move towards the direction close to the forklift mast, the fixed plates tightly abut against the forklift mast, thereby fixing the forklift mast components on the base, facilitating spot welding of the forklift mast;

[0032] 3. When the internal edge seam of the forklift mast is welded, the forklift mast is moved to the clamping ring on the bearing seat, then the forklift mast is placed on the bearing seat by fixing and connecting the plurality of clamping rings through the connecting pieces, thereby facilitating welding of the internal components of the forklift mast. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is the structure diagram of the outer wall welding fixing assembly in the embodiment of the application.

[0034] Figure 2 It is the structure diagram of the inner wall welding fixing assembly in the embodiment of the application.

[0035] Figure 3 It is the structure diagram of the clamp assembly in the embodiment of the application.

[0036] Figure 4 It is the structure diagram of the clamping ring in the embodiment of the application.

[0037] Mark No.: 1, outer wall welding fixed assembly; 11, base; 12, mounting frame; 13, fixed plate; 14, top rod; 15, clamping block; 16, handle; 17, clamping groove; 18, guide rod; 19, guide groove; 2, inner wall welding fixed assembly; 21, mounting seat one; 22, mounting seat two; 23, rotating seat; 24, rotary table; 25, motor; 26, support seat; 27, pressing block; 28, air cylinder; 3, control console; 31, mechanical arm; 32, welding gun; 33, channel; 4, clamp assembly; 41, bearing seat; 42, rotating roller; 43, clamping ring; 44, connecting plate; 45, through hole; 46, bolt; 47, nut. DETAILED DESCRIPTION

[0038] The following will be described in detail below with reference to the accompanying drawings. Figures 1-4 The application is further described in detail.

[0039] The embodiment of the application discloses a forklift mast inner and outer wall welding device.

[0040] Referring to Figure 1 and Figure 2 A forklift mast inner and outer wall welding device comprises an outer wall welding fixed assembly 1 and an inner wall welding fixed assembly 2. The outer wall welding fixed assembly 1 comprises a base 11, the top surface of the base 11 is fixed with a plurality of mounting frames 12 on both sides, the mounting frames 12 are arranged at equal intervals along the length direction of the base 11, the inner side of the mounting frame 12 is provided with a fixed plate 13, the side of the fixed plate 13 close to the mounting frame 12 is rotatably installed with a top rod 14, one end of the top rod 14 away from the fixed plate 13 penetrates through the mounting frame 12, and the top rod 14 is threadedly connected with the mounting frame 12. One end of the top rod 14 away from the fixed plate 13 is fixed with a clamping block 15, one side of one of the top rods 14 away from the fixed plate 13 is provided with a handle 16, the side of the handle 16 is provided with a clamping groove 17 penetrating through the handle 16, and the clamping block 15 is inserted into the clamping groove 17. The side top end and the side bottom end of the fixed plate 13 close to the mounting frame 12 are fixed with guide rods 18, and the side of the mounting frame 12 close to the fixed plate 13 is provided with two guide grooves 19, and one end of the two guide rods 18 away from the fixed plate 13 penetrates through the two guide grooves 19 respectively.

[0041] When the inner and outer walls of the forklift mast are welded, first, the forklift mast is placed on the base 11 for splicing, then the handle 16 is sleeved on the clamping block 15, the handle 16 is rotated, the handle 16 drives the top rod 14 to rotate, the top rod 14 drives the fixed plate 13 to move towards the direction close to the forklift mast, and 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 the workers can conveniently point weld the connecting part of the forklift mast.

[0042] Referring to Figure 2 and Figure 3The inner wall welding fixed assembly 2 comprises oppositely arranged mounting seat one 21 and mounting seat two 22, and the side of the mounting seat one 21 and the mounting seat two 22 close to each other is rotatably provided with a rotating seat 23, and the rotating seat 23 is fixedly provided with a rotating table 24 between the two rotating seats 23, the side of the mounting seat one 21 away from the mounting seat two 22 is fixedly provided with a motor 25, and the output shaft of the motor 25 is fixedly connected with the side of one of the rotating seats 23. The side of the two rotating seats 23 close to each other is fixedly provided with a support seat 26, and the top surface of the support seat 26 is fixedly connected with the top surface of the rotating seat 23. The lower side of the support seat 26 is provided with a pressing block 27, and the top surface of the support seat 26 is fixedly provided with a pneumatic cylinder 28 on both sides, and the bottom end of the pneumatic cylinder 28 piston rod penetrates through the support seat 26, and the pneumatic cylinder 28 piston rod is slidably connected with the support seat 26 in the vertical direction, and the bottom end of the pneumatic cylinder 28 piston rod is fixedly connected with the top surface of the pressing block 27.

[0043] With reference to Figure 2 The side of the mounting seat two 22 away from the mounting seat one 21 is provided with a control console 3, and the side of the control console 3 close to the mounting seat two 22 is fixedly provided with a mechanical arm 31, and the control console 3 is used for controlling the mechanical arm 31 to stretch and retract, and one end of the mechanical arm 31 close to the mounting seat two 22 is fixedly provided with a welding gun 32. The side of the mounting seat two 22 close to the control console 3 is provided with a channel 33, and the channel 33 penetrates through the mounting seat two 22 and the support seat 26, and the mechanical arm 31 can penetrate through the channel 33.

[0044] When the spot welding of the outer wall connecting position of the forklift mast is completed, the forklift mast is moved to the rotating table 24, then the pneumatic cylinder 28 is started, the pneumatic cylinder 28 piston rod 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 mast, thereby the forklift mast is pressed on the rotating table 24. Then the motor 25 is started, the output shaft of the motor 25 drives the support seat 26 to rotate, the support seat 26 drives the rotating table 24 to rotate, so that the rotating table 24 drives the forklift door to rotate by 45 degrees, then the mechanical arm 31 is controlled through the control console 3, so that the mechanical arm 31 penetrates through the channel 33 and extends into the forklift mast, thereby the welding gun 32 on the mechanical arm 31 welds the inner wall connecting edge seam of the forklift mast. When the welding of one edge seam is completed, the motor 25 is started again, so that the rotating table 24 drives the forklift mast to rotate by 45 degrees again, and the welding gun 32 welds the other edge seam of the inner wall of the forklift mast, until the four edge seams of the inner wall of the forklift mast are welded.

[0045] With reference to Figure 3 and Figure 4The utility model also comprises a plurality of clamp assemblies 4, the clamp assembly 4 includes the load-bearing seat 41, the rotation roller 42 is rotatably installed between the opposite inner side of load-bearing seat 41, and the two rotation rollers 42 are arranged in parallel with each other. A plurality of clamping rings 43 are arranged on the two rotation rollers 42, the inner side of the clamping ring 43 is a plane, and the plurality of clamping rings 43 are sequentially connected to enclose a circle. The clamping ring 43 sequentially connected can rotate on the two rotation rollers 42. The two sides of the clamping ring 43 are both fixed with connecting plates 44, the side of the connecting plate 44 is provided with a through hole 45, the through hole 45 on the two connecting plates 44 of the adjacent two clamping rings 43 is sequentially provided with a bolt 46, the bolt 46 is sleeved with a nut 47, and the nut 47 abuts against one of the connecting plates 44.

[0046] One of the clamping rings 43 is placed on the two rotation rollers 42, then the forklift mast is moved to the clamping ring 43, then the remaining clamping rings 43 are spliced with the clamping ring 43 on the rotation roller 42, then the bolt 46 is passed through the through hole 45 on the two adjacent connecting plates 44, the nut 47 is sleeved on the bolt 46, the nut 47 is rotated to abut against one of the connecting plates 44, so that the two adjacent clamping rings 43 are fixedly connected, the plurality of clamping rings 43 clamp the forklift mast, and then the internal components of the forklift mast are welded, the clamping ring 43 is rotated, the forklift mast is driven to rotate, the angle of the forklift mast is adjusted, the internal components are welded at a suitable angle, and the welding is facilitated.

[0047] The implementation principle of the fork truck portal inner and outer wall welding device is as follows: first, the fork truck portal components are placed on the base 11 for assembly, then the rotating handle 16 is respectively sleeved on the clamping block 15 on the top surface of the base 11, the rotating handle 16 is rotated to drive the clamping block 15 to rotate, the clamping block 15 drives the jack 14 to rotate, the jack 14 drives the fixed plate 13 to move towards the direction close to the fork truck portal, the fixed plate 13 on the top surface of the base 11 on both sides fixes the assembled fork truck portal on the base 11, then the workers use the welding equipment to spot weld the connection of the fork truck portal components. Then the spot-welded fork truck portal is moved to the rotating table 24, the cylinder 28 is started, the piston rod of the cylinder 28 drives the pressing block 27 to move downwards, the pressing block 27 tightly presses the fork truck portal on the rotating table 24, the motor 25 is started, the output shaft of the motor 25 drives the rotating seat 23 to rotate, the rotating seat 23 drives the rotating table 24 to rotate, the rotating table 24 drives the fork truck portal to rotate by 45 degrees, then the control console 3 is operated, the control console 3 controls the mechanical arm 31 to extend into the fork truck portal through the channel 33, and the welding gun 32 welds the inner wall edge joint of the fork truck portal. After one edge joint is welded, the motor 25 is started again, the rotating table 24 drives the fork truck portal to rotate by 45 degrees, until the four edge joints in the fork truck portal are all welded. Then the control console 3 is operated again, the control console 3 controls the mechanical arm 31 to exit the channel 33, the motor 25 is started again, the rotating table 24 drives the fork truck portal to rotate to the horizontal state, then the workers weld the edge joint of the outer wall of the fork truck portal by the welding gun 32, the welding of the fork truck portal is completed, thereby avoiding the problem that the channel 33 in the fork truck portal is narrow and inconvenient for welding the inner connection edge joint of the fork truck portal, and the welding efficiency of the fork truck portal is improved.

[0048] The embodiment of the application also discloses a fork truck portal inner and outer wall welding method.

[0049] S1: the fork truck portal is fixed by the outer wall welding fixing assembly 1, and the outer wall of the fork truck portal is spot welded;

[0050] S2: the spot-welded fork truck portal is moved to the rotating table 24, then the rotating table 24 drives the fork truck portal to rotate, the inner wall edge joint welding angle of the fork truck portal is adjusted, then the control console 3 controls the mechanical arm 31, the mechanical arm 31 drives the welding gun 32 to move to the inside of the fork truck portal to weld the inner wall edge joint of the fork truck portal;

[0051] S3: when the inner wall edge joint welding of the fork truck is completed, the rotating table 24 drives the fork truck portal to rotate, and the outer wall edge joint of the fork truck portal is welded;

[0052] S4: after the welding of the inner and outer walls of the forklift mast is completed, the forklift mast is moved to the clamp assembly 4, the clamp ring 43 is rotated to drive the forklift mast to rotate, and the angle of the forklift mast is adjusted, so that the internal components can be welded at a suitable angle.

[0053] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A welding device for the inner and outer walls of a forklift mast, characterized in that: The assembly includes an outer wall welding fixing component (1) and an inner wall welding fixing component (2). The inner wall welding fixing component (2) includes a mounting base one (21) and a mounting base two (22) arranged opposite to each other. Rotary seats (23) are rotatably mounted on opposite sides of the mounting base one (21) and the mounting base two (22). A rotating platform (24) for placing a forklift mast is fixed between the two rotating seats (23). Each of the two rotating seats (23) is provided with a fixing member for fixing the forklift mast. A motor (25) is fixed on the side of the mounting base one (21) away from the mounting base two (22). The output shaft of the ) is fixedly connected to the side wall of one of the rotating seats (23). The side of the mounting seat (22) is provided with a channel (33) through the rotating seat (23). The mounting seat (22) is provided with a control console (3) on the side away from the mounting seat (21). The control console (3) is provided with a robotic arm (31) and is used to control the movement of the robotic arm (31). The robotic arm (31) is provided with a welding torch (32) at the end away from the control console (3). The robotic arm (31) can pass through the channel (33) and be inserted into the forklift mast. The outer wall welding fixing assembly (1) includes a base (11). Multiple mounting brackets (12) are provided on both sides of the top surface of the base (11). The multiple mounting brackets (12) are equally spaced along the length direction of the base (11). A fixing plate (13) is provided on the inner side of the mounting bracket (12). A top rod (14) is provided on the side of the mounting bracket (12) near the fixing plate (13). The top rod (14) is threadedly connected to the mounting bracket (12). One end of the top rod (14) near the fixing plate (13) is rotatably mounted on the side of the fixing plate (13) near the mounting bracket (12). It also includes multiple clamping assemblies (4), each clamping assembly (4) including a support base (41), on which multiple clamping rings (43) are provided. The multiple clamping rings (43) are connected end to end in sequence to form a circle. The inner surface of each clamping ring (43) is a plane. A connector for fixing the two adjacent clamping rings (43) is provided between two adjacent clamping rings (43). Two parallel rotating rollers (42) are rotatably mounted between the opposite inner surfaces of the load-bearing seat (41), and the clamping ring (43) can rotate on the two rotating rollers (42); Two adjacent clamping rings (43) are fixed with connecting plates (44) at both ends on their sides. The connecting plates (44) have through holes (45) on their sides. The connecting member includes a bolt (46). The bolt (46) passes through the through holes (45) on the two adjacent connecting plates (44) in sequence. A nut (47) is fitted on the bolt (46) and the nut (47) is threadedly connected to the bolt (46).

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

3. The welding device for the inner and outer walls of a forklift mast according to claim 1, characterized in that: A guide rod (18) is fixed to the side of the fixing plate (13) near the mounting bracket (12). A guide hole is provided on the side of the mounting bracket (12) near the fixing plate (13), and the guide rod (18) passes through the guide hole.

4. The welding device for the inner and outer walls of a forklift mast according to claim 1, characterized in that: One of the top rods (14) is provided with a handle (16) at one end away from the fixed plate (13), and a locking block (15) is fixed at the other end of the top rod (14) away from the fixed plate (13). A slot (17) is provided on the side of the handle (16), and the locking block (15) is inserted into the slot (17).

5. A method for welding the inner and outer walls of a forklift mast, comprising a welding device for the inner and outer walls of a forklift mast according to any one of claims 1-4, characterized in that, Includes the following steps: S1: Fix the forklift mast by welding the outer wall fixing assembly (1) and spot weld the outer wall of the forklift mast; S2: Move the spot-welded forklift mast to the rotary table (24), and then rotate the forklift mast through the rotary table (24) to adjust the welding angle of the inner wall seam of the forklift mast. Then control the robotic arm (31) through the control console (3) to move the welding gun (32) to the inside of the forklift mast to weld the inner wall seam of the forklift mast. S3: After the inner wall seam of the forklift is welded, the forklift mast is rotated by the rotary table (24) to weld the outer wall seam of the forklift mast; S4: After the welding of the inner and outer walls of the forklift mast is completed, the forklift mast is moved onto the clamp assembly (4). By rotating the clamping ring (43), the clamping ring (43) drives the forklift mast to rotate, and the angle of the forklift mast is adjusted so that the internal components can be welded at a suitable angle.

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