A welding device for forklift cab frame

Abstract

The present invention discloses a welding device for a forklift cab frame, and the present invention relates to the field of frame welding technology, including a base, wherein the top side wall of the base is symmetrically provided with two first grooves, the bottom inner walls of the two first grooves are fixedly connected with a first electric slide rail, and the top side wall of the first electric slide rail is slidably connected with a first slide plate. The present invention can adjust the angle between the first fixed frame and the second fixed frame according to the overhead guard with different bending angles, so that the angle between the first fixed frame and the second fixed frame corresponds to the bending part of the overhead guard, which is convenient for fixing the bending part of the overhead guard, and can adjust the angle of the front beam when welding with the overhead guard, so as to avoid errors when the staff manually adjusts the angle of the front beam, and can make the side wall of the front beam after the angle is adjusted contact with the side wall of the overhead guard, so as to reduce the work intensity of the staff and improve the welding efficiency and reliability of the device when welding the cab frame.

Description

Technical Field

[0001] The invention belongs to the technical field of frame welding, and in particular relates to a welding device for a forklift cab frame. Background Art

[0002] The forklift cab frame is the basic structure of the forklift cab, which is responsible for supporting the entire cab and providing a safe operating environment for the driver. The cab frame is usually made of metal materials (such as steel) and is welded together into an overall frame structure.

[0003] However, when welding the overhead guard and the front beam of the cab frame, since different forklift models require different inclination angles of the front part of the bottom plate, when welding the overhead guard and the front beam, it is necessary to ensure that the lower ends of the overhead guard and the front beam coincide with the upper surface of the cab bottom plate after the overhead guard and the front beam are welded together, so as to facilitate the subsequent welding of the overhead guard and the front beam and the bottom plate. When welding the overhead guard and the front beam, the prior art first uses a fixing device to fix the overhead guard, and then respectively contacts the two front beams with the side walls of the overhead guard, and then welds them. However, during the welding process, the worker needs to hold the front beam by hand. Beam, ensure that the front beam is in contact with the side wall of the overhead guard, and it is also necessary to manually adjust the contact angle between the front beam and the overhead guard to ensure that when the overhead guard and the front beam are subsequently welded to the bottom plate, the lower ends of the overhead guard and the front beam can coincide with the upper surface of the bottom plate of the cab. However, when the staff manually adjusts the angle of the front beam, errors are likely to occur, resulting in the roof guard or the lower end of the front beam not being able to completely coincide with the upper surface of the bottom plate. In addition, since the front beam is heavy, the staff will always have to maintain the inclination angle of the front beam during the welding process, which will bring a greater burden to the staff and greatly reduce the welding efficiency and reliability of the cab frame.

[0004] Therefore, we propose a welding device for a forklift cab frame to solve the above problems. Summary of the invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A welding device for a forklift cab frame comprises a base, the top side wall of the base is symmetrically provided with two first grooves, the bottom inner walls of the two first grooves are fixedly connected with a first electric slide rail, the top side wall of the first electric slide rail is slidably connected with a first slide plate, the top side wall of the first slide plate is fixedly connected with a mounting frame, the inner wall of the mounting frame is movably connected with a support plate, the top side wall of the support plate is fixedly connected with a first electric telescopic rod, the telescopic ends of the first electric telescopic rods are fixedly connected with an arc welding robot, the inner wall of one end of the mounting frame is fixedly connected with a second electric telescopic rod, the telescopic ends of the second electric telescopic rod are fixedly connected with the side walls of the corresponding support plates, the top side wall of the base is provided with a second groove, the inner wall of the second groove is fixedly connected with a top guard frame fixing assembly, the top side wall of the base is provided with a third groove, and the inner wall of the third groove is fixedly connected with a front beam fixing assembly.

[0007] Preferably, the overhead guard frame fixing assembly includes a second electric slide rail fixedly connected to the inner wall of the second groove, two second slide plates are slidably connected to the top side walls of the second electric slide rail, the top side walls of the two second slide plates are fixedly connected to a third electric telescopic rod, the telescopic ends of the third electric telescopic rod are fixedly connected to a fixing cylinder, the inner wall of the fixing cylinder is fixedly connected to a plurality of fourth electric telescopic rods, and the telescopic ends of the plurality of fourth electric telescopic rods are fixedly connected to the first clamping plate.

[0008] Preferably, the side walls of the fixed cylinder are fixedly connected to a support plate, the top side walls of the support plate are fixedly connected to a fifth electric telescopic rod, the telescopic ends of the fifth electric telescopic rod are fixedly connected to a shell, the top side walls of the shell are rotatably connected to the fixed plate, the bottom inner walls of the shell are fixedly connected to a first motor, the output end of the first motor passes through the side walls of the shell and is fixedly connected to the bottom side walls of the fixed plate, and the side walls of the fixed plate are fixedly connected to an angle adjustment assembly.

[0009] Preferably, the angle adjustment assembly includes a side wall at one end of a fixed plate, fixedly connected to a sixth electric telescopic rod, the telescopic end of the sixth electric telescopic rod is fixedly connected to a U-shaped plate, the inner walls at both ends of the U-shaped plate are rotatably connected to the same round rod, the rod wall of the round rod is fixedly connected to a side plate, the side wall at one end of the U-shaped plate is fixedly connected to a second motor, the output end of the second motor passes through the side wall of the U-shaped plate and is fixedly connected to one end of the round rod, the side wall of the side plate is fixedly connected to a first fixed frame, and two seventh electric telescopic rods are symmetrically fixedly connected to the inner walls at both ends of the first fixed frame.

[0010] Preferably, the telescopic ends of the seventh electric telescopic rod are fixedly connected to the second clamping plate, the top side wall of the first fixed frame is rotatably connected to the rotating rod, the rod wall of the rotating rod is fixedly connected to the second fixed frame, the side wall of the second fixed frame is symmetrically provided with strip openings matching the side wall of the first fixed frame, the inner walls at both ends of the second fixed frame are symmetrically fixedly connected to two eighth electric telescopic rods, and the telescopic ends of the two eighth electric telescopic rods are fixedly connected to the third clamping plate.

[0011] Preferably, the front beam fixing assembly includes a third electric slide rail fixedly connected to the inner wall at the top end of the third groove, two third slide plates are slidably connected to the side wall at the top end of the third electric slide rail, a fourth groove is provided on the side wall at one end of the two third slide plates, a ninth electric telescopic rod is fixedly connected to the inner wall of the fourth groove, the telescopic end of the ninth electric telescopic rod is fixedly connected to a connecting plate, the tenth electric telescopic rod is fixedly connected to the side wall at the top end of the connecting plate, and the telescopic end of the tenth electric telescopic rod is fixedly connected to a connecting frame.

[0012] Preferably, the top side wall of the connecting frame is rotatably connected to the bottom plate, the bottom side wall of the bottom plate is provided with a fifth groove, the inner wall of the fifth groove is movably connected to a slider, the bottom inner wall of the connecting frame is fixedly connected to an eleventh electric telescopic rod, the telescopic end of the eleventh electric telescopic rod is rotatably connected to the bottom side wall of the slider, the top side wall of the bottom plate is fixedly connected to a connecting tube, the inner wall of the connecting tube is symmetrically fixedly connected to two twelfth electric telescopic rods, and the telescopic ends of the twelfth electric telescopic rod are both fixedly connected to a fourth clamping plate.

[0013] Preferably, one end side wall of the first fixed frame is fixedly connected with a fixed block, the top side wall of the fixed block is fixedly connected with a fourth motor, and the output end of the fourth motor is fixedly connected with one end of the rotating rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By setting up the overhead guard fixing component, the front beam fixing component and the angle adjustment component, the angle between the first fixing frame and the second fixing frame can be adjusted according to the overhead guards with different bending angles, so that the angle between the first fixing frame and the second fixing frame corresponds to the bending part of the overhead guard, which is convenient for stable fixation of the bending part of the overhead guard, ensuring that stable welding between the front beam and the overhead guard can be performed subsequently, and at the same time, the angle of the front beam when welding with the overhead guard can be automatically adjusted to avoid errors when the staff manually adjusts the angle of the front beam, and the side wall of the front beam after the angle is adjusted can be automatically brought into contact with the side wall of the overhead guard, and an arc welding robot can be used to weld them, thereby reducing the work intensity of the staff and improving the welding efficiency and reliability of the device when welding the cab frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the present invention from other angles;

[0018] Figure 3 It is a schematic cross-sectional view of part of the structure of the present invention;

[0019] Figure 4 It is a schematic diagram of the partial structure of the present invention Figure 1 ;

[0020] Figure 5 It is a schematic diagram of the partial structure of the present invention Figure 2 ;

[0021] Figure 6 It is a schematic diagram of the partial structure of the present invention Figure 3 ;

[0022] Figure 7 It is a schematic diagram of the partial structure of the present invention Figure 4 .

[0023] In the figure: 1, base; 2, first groove; 3, first electric slide rail; 4, first slide plate; 5, mounting frame; 6, support plate; 7, first electric telescopic rod; 8, arc welding robot; 9, second electric telescopic rod; 10, second groove; 11, top guard frame fixing assembly; 111, second electric slide rail; 112, second slide plate; 113, third electric telescopic rod; 114, fixing cylinder; 115, fourth electric telescopic rod; 116, first clamping plate; 117, support plate; 118, fifth electric telescopic rod; 119, housing; 1110, fixing plate; 1111, first motor; 1112, angle adjustment assembly; 1113, sixth electric telescopic rod; 1114, U-shaped plate; 1115, round rod; 1116, side plate; 1117, second motor; 1118 , the first fixed frame; 1119, the seventh electric telescopic rod; 1120, the second clamping plate; 1121, the rotating rod; 1122, the second fixed frame; 1123, the strip opening; 1124, the eighth electric telescopic rod; 1125, the third clamping plate; 12, the third groove; 13, the front beam fixing assembly; 131, the third electric slide rail; 132, the third slide plate; 133, the fourth groove; 134, the ninth electric telescopic rod; 135, the connecting plate; 136, the tenth electric telescopic rod; 137, the connecting frame; 138, the bottom plate; 139, the fifth groove; 1310, the sliding block; 1311, the eleventh electric telescopic rod; 1312, the connecting tube; 1313, the twelfth electric telescopic rod; 1314, the fourth clamping plate; 1315, the fixing block; 1316, the fourth motor. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] The following electrical components are all electrically connected to the peripheral PLC controller.

[0026] Reference Figure 1 - Figure 7 A welding device for a forklift cab frame comprises a base 1, wherein the top side wall of the base 1 is symmetrically provided with two first grooves 2, the bottom inner walls of the two first grooves 2 are fixedly connected with a first electric slide rail 3, the top side wall of the first electric slide rail 3 is slidably connected with a first slide plate 4, the top side wall of the first slide plate 4 is fixedly connected with a mounting frame 5, the inner wall of the mounting frame 5 is movably connected with a support plate 6, the top side wall of the support plate 6 is fixedly connected with a first electric telescopic rod 7, the telescopic ends of the first electric telescopic rod 7 are fixedly connected with an arc welding robot 8, the inner wall of one end of the mounting frame 5 is fixedly connected with a second electric telescopic rod 9, the telescopic end of the second electric telescopic rod 9 is fixedly connected to the side wall of the corresponding support plate 6, the top side wall of the base 1 is provided with a second groove 10, the inner wall of the second groove 10 is fixedly connected with a top guard frame fixing component 11, the top side wall of the base 1 is provided with a third groove 12, the inner wall of the third groove 12 is fixedly connected with a front beam fixing component 13.

[0027] In the embodiment, the overhead guard frame fixing assembly 11 includes a second electric slide rail 111 fixedly connected to the inner wall of the second groove 10, two second slide plates 112 are slidably connected to the top side wall of the second electric slide rail 111, the top side walls of the two second slide plates 112 are fixedly connected to the third electric telescopic rod 113, the telescopic ends of the third electric telescopic rod 113 are fixedly connected to the fixing cylinder 114, the inner wall of the fixing cylinder 114 is fixedly connected to a plurality of fourth electric telescopic rods 115, and the telescopic ends of the plurality of fourth electric telescopic rods 115 are fixedly connected to the first clamping plate 116;

[0028] The side walls of the fixed cylinder 114 are fixedly connected to the support plate 117, the top side walls of the support plate 117 are fixedly connected to the fifth electric telescopic rod 118, the telescopic ends of the fifth electric telescopic rod 118 are fixedly connected to the outer shell 119, the top side walls of the outer shell 119 are rotatably connected to the fixed plate 1110, the bottom inner wall of the outer shell 119 is fixedly connected to the first motor 1111, the output end of the first motor 1111 passes through the side wall of the outer shell 119 and is fixedly connected to the bottom side wall of the fixed plate 1110, and the side wall of the fixed plate 1110 is fixedly connected to the angle adjustment component 1112.

[0029] Specifically, the position of the fixing tube 114 can be adjusted according to the spacing of the lower end pillars of the overhead guard, and the bottom end of the overhead guard is supported by the fixing tube 114. The third electric telescopic rod 113 is controlled to start, so as to drive the fixing tube 114 and the overhead guard to move upward, thereby ensuring that when the angle between the front beam and the overhead guard is adjusted later, the base 1 will not affect the adjustment of the angle of the front beam, thereby facilitating the subsequent welding between the front beam and the overhead guard and improving the stability of the device during welding.

[0030] In the embodiment, the angle adjustment assembly 1112 includes a fixed plate 1110, a side wall at one end of which is fixedly connected to a sixth electric telescopic rod 1113, a telescopic end of the sixth electric telescopic rod 1113 is fixedly connected to a U-shaped plate 1114, the inner walls at both ends of the U-shaped plate 1114 are rotatably connected to the same round rod 1115, the rod wall of the round rod 1115 is fixedly connected to a side plate 1116, a side wall at one end of the U-shaped plate 1114 is fixedly connected to a second motor 1117, an output end of the second motor 1117 passes through the side wall of the U-shaped plate 1114 and is fixedly connected to one end of the round rod 1115, a side wall of the side plate 1116 is fixedly connected to a first fixed frame 1118, and two seventh electric telescopic rods 1119 are symmetrically fixedly connected to the inner walls at both ends of the first fixed frame 1118;

[0031] The telescopic ends of the seventh electric telescopic rod 1119 are fixedly connected to the second clamping plate 1120, the top side wall of the first fixed frame 1118 is rotatably connected to the rotating rod 1121, the rod wall of the rotating rod 1121 is fixedly connected to the second fixed frame 1122, the side wall of the second fixed frame 1122 is symmetrically provided with a strip opening 1123 matching the side wall of the first fixed frame 1118, the inner walls of both ends of the second fixed frame 1122 are symmetrically fixedly connected to two eighth electric telescopic rods 1124, and the telescopic ends of the two eighth electric telescopic rods 1124 are fixedly connected to the third clamping plate 1125;

[0032] The side walls at one end of the first fixing frame 1118 are fixedly connected to the fixing block 1315 , the top side walls of the fixing block 1315 are fixedly connected to the fourth motor 1316 , and the output end of the fourth motor 1316 is fixedly connected to one end of the rotating rod 1121 .

[0033] Specifically, the angle between the first fixed frame 1118 and the second fixed frame 1122 can be adjusted according to the roof guard with different bending angles, so that the angle between the first fixed frame 1118 and the second fixed frame 1122 corresponds to the bending part of the roof guard, which is convenient for stable fixation of the bending part of the roof guard and ensures that stable welding can be performed between the front beam and the roof guard later.

[0034] In the embodiment, the front beam fixing assembly 13 includes a third electric slide rail 131 fixedly connected to the inner wall at the top end of the third groove 12, two third slide plates 132 are slidably connected to the side wall at the top end of the third electric slide rail 131, and a fourth groove 133 is provided on the side wall at one end of the two third slide plates 132, and a ninth electric telescopic rod 134 is fixedly connected to the inner wall of the fourth groove 133, and the telescopic end of the ninth electric telescopic rod 134 is fixedly connected to a connecting plate 135, and the top side wall of the connecting plate 135 is fixedly connected to the tenth electric telescopic rod 136, and the telescopic end of the tenth electric telescopic rod 136 is fixedly connected to a connecting frame 137;

[0035] The top side wall of the connecting frame 137 is rotatably connected to the bottom plate 138, and the bottom side wall of the bottom plate 138 is provided with a fifth groove 139, and the inner wall of the fifth groove 139 is movably connected to the slider 1310, and the bottom inner wall of the connecting frame 137 is fixedly connected to the eleventh electric telescopic rod 1311, and the telescopic end of the eleventh electric telescopic rod 1311 is rotatably connected to the bottom side wall of the slider 1310, and the top side wall of the bottom plate 138 is fixedly connected to the connecting tube 1312, and the inner wall of the connecting tube 1312 is symmetrically fixedly connected to two twelfth electric telescopic rods 1313, and the telescopic ends of the twelfth electric telescopic rod 1313 are fixedly connected to the fourth clamping plate 1314.

[0036] Specifically, it can automatically adjust the angle of the front beam when it is welded to the overhead guard frame, avoiding errors when the staff manually adjusts the angle of the front beam, and can automatically make the side wall of the front beam after the angle is adjusted contact with the side wall of the overhead guard frame, and use the arc welding robot 8 to weld them, thereby reducing the work intensity of the staff and improving the welding efficiency and reliability of the device when welding the cab frame.

[0037] The operating principle of the present invention is now described as follows:

[0038] In the present invention, when it is necessary to weld the overhead guard and the front beam, firstly, the second electric slide rail 111 is controlled to start, driving the two slide plates to move, so that the distance between the two fixed cylinders 114 is the same as the distance between the two pillars at the lower end of the overhead guard, and then the staff puts the two pillars at the lower end of the overhead guard into the corresponding fixed cylinders 114 respectively, and ensures that the entire overhead guard is located above the base 1, and then the fourth electric telescopic rod 115 is controlled to start, driving the first clamping plate 116 to move toward the outer wall of the pillar at the lower end of the overhead guard, and the overhead guard is fixed by the first clamping plate 116. Since the front beam and the overhead guard need to match the upper surface of the bottom of the forklift cab after welding, in order to facilitate the subsequent adjustment of the angle between the front beam and the overhead guard, it is necessary to prevent the bottom end of the front beam from being aligned with the overhead guard. When the top frame is welded, it contacts the base 1, which affects the fixation of the front beam. By controlling the third electric telescopic rod 113 to start, the fixing cylinder 114 and the top guard are driven to move upward, until it is ensured that when the subsequent front beam adjusts the angle with the top guard, the base 1 will not affect the adjustment of the angle of the front beam. Then, the fifth electric telescopic rod 118 is controlled to start, driving the shell 119 and the fixing plate 1110 to move upward, so that one end of the fixing plate 1110 corresponds to the bending part of the top guard. Then, the first motor 1111 is controlled to start, driving the fixing plate 1110 to rotate, so that the sixth electric telescopic rod 1113 is opposite to the top guard. Then, the second motor 1117 is controlled to start, driving the round rod 1115 to rotate, so that the side plate 1116 rotates accordingly. During the process, the first fixed frame 1118 will be driven to rotate. When the inclination angle of the first fixed frame 1118 is the same as the inclination angle of the lower end of the bending part of the overhead guard frame, the first motor 1111 is controlled to stop, and then the fourth motor 1316 is controlled to start, driving the rotating rod 1121 to rotate, so that the second fixed frame 1122 rotates, so that the angle between the second fixed frame 1122 and the first fixed frame 1118 matches the angle of the bending part of the overhead guard frame, and then the sixth electric telescopic rod 1113 is controlled to start, driving the first fixed frame 1118 and the second fixed frame 1122 to move toward the overhead guard frame, so that the second clamping plate 1120 and the third clamping plate 1125 are respectively located on both sides of the overhead guard frame, and then the eighth electric telescopic rod 1124 and the seventh electric telescopic rod 1125 are controlled to start. 19 is started at the same time, and the second clamping plate 1120 and the third clamping plate 1125 are used to fix the bending part of the overhead guard frame to ensure that the overhead guard frame is stably fixed at this time, so as to facilitate the subsequent welding between the overhead guard frame and the front beam. Then, the third electric slide rail 131 is controlled to start, and the third slide plate 132 is driven to move, so that the positions of the two connecting cylinders 1312 correspond to the two sides of the overhead guard frame, and then the two front beams are respectively placed in the connecting cylinders 1312, and then the twelfth electric telescopic rod 1313 is controlled to start, and the front beam is fixed by the fourth clamping plate 1314, and then the eleventh electric telescopic rod 1311 is controlled to start, and the slider 1310 is driven to move upward. Since the bottom plate 138 is rotatably connected to the connecting frame 137, and the slider 1310 is limited by the fifth groove 139,During the process of the eleventh electric telescopic rod 1311 extending upward, the bottom plate 138 will be driven to rotate around the rotation connection with the connecting frame 137, so that the front beam is tilted. When the front beam is tilted to an angle that can coincide with the bottom of the cab, the eleventh electric telescopic rod 1311 is controlled to stop extending, and then the tenth electric telescopic rod 136 is controlled to drive the front beam to move upward so that the upper end of the front beam and the lower end of the overhead guard are in the same plane. Then the ninth electric telescopic rod 134 is controlled to start and drive the front beam to move toward the overhead guard. When the front beam moves to the position for welding with the overhead guard, the ninth electric telescopic rod 134 is controlled to stop extending, and then the first electric slide rail 3 is controlled to start and drive the first slide plate 4 to move so that the arc welding robot 8 can be located at the bottom of the welding point between the front beam and the overhead guard. Then the first electric telescopic rod 7 is controlled to start and drive the arc welding robot 8 to move upward so that the welding end of the arc welding robot 8 is located between the front beam and the overhead guard. On one side of the welding part of the roof guard, the second electric telescopic rod 9 is controlled to start, driving the support plate 6 to move, so that the arc welding robot 8 can approach the welding part, so as to weld the front beam and the roof guard, and can adjust the angle between the first fixed frame 1118 and the second fixed frame 1122 according to the roof guard with different bending angles, so that the angle between the first fixed frame 1118 and the second fixed frame 1122 corresponds to the bending part of the roof guard, which is convenient for stable fixation of the bending part of the roof guard, ensuring that the front beam and the roof guard can be stably welded in the future, and at the same time, the angle of the front beam when welding with the roof guard can be automatically adjusted to avoid errors when the staff manually adjusts the angle of the front beam, and the side wall of the front beam after the angle is adjusted can be automatically contacted with the side wall of the roof guard, and the arc welding robot 8 is used to weld them, which reduces the work intensity of the staff and improves the welding efficiency and reliability of the device when welding the cab frame.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding device for a forklift cab frame, comprising a base (1), characterized in that: The top side wall of the base (1) is symmetrically provided with two first grooves (2), the bottom inner walls of the two first grooves (2) are fixedly connected to a first electric slide rail (3), the top side wall of the first electric slide rail (3) is slidably connected to a first slide plate (4), the top side walls of the first slide plate (4) are fixedly connected to a mounting frame (5), the inner wall of the mounting frame (5) is movably connected to a support plate (6), the top side wall of the support plate (6) is fixedly connected to a first electric telescopic rod (7), and the telescopic ends of the first electric telescopic rod (7) are fixedly connected to the first electric telescopic rod (7). An arc welding robot (8) is fixedly connected to the base (1); a second electric telescopic rod (9) is fixedly connected to the inner wall of one end of the mounting frame (5); the telescopic end of the second electric telescopic rod (9) is fixedly connected to the side wall of the corresponding support plate (6); a second groove (10) is provided on the top side wall of the base (1); an overhead guard frame fixing component (11) is fixedly connected to the inner wall of the second groove (10); a third groove (12) is provided on the top side wall of the base (1); and a front beam fixing component (13) is fixedly connected to the inner wall of the third groove (12); The overhead guard frame fixing assembly (11) comprises a second electric slide rail (111) fixedly connected to the inner wall of the second groove (10), the top side wall of the second electric slide rail (111) being slidably connected to two second slide plates (112), the top side walls of the two second slide plates (112) being fixedly connected to a third electric telescopic rod (113), the telescopic ends of the third electric telescopic rod (113) being fixedly connected to a fixing cylinder (114), the inner wall of the fixing cylinder (114) being fixedly connected to a plurality of fourth electric telescopic rods (115), and the telescopic ends of the plurality of fourth electric telescopic rods (115) being fixedly connected to a first clamping plate (116); The side walls of the fixed cylinder (114) are fixedly connected to a support plate (117), the top side walls of the support plate (117) are fixedly connected to a fifth electric telescopic rod (118), the telescopic ends of the fifth electric telescopic rod (118) are fixedly connected to a housing (119), the top side walls of the housing (119) are rotatably connected to a fixed plate (1110), the bottom inner wall of the housing (119) is fixedly connected to a first motor (1111), the output end of the first motor (1111) passes through the side walls of the housing (119) and is fixedly connected to the bottom side wall of the fixed plate (1110), and the side walls of the fixed plate (1110) are fixedly connected to an angle adjustment assembly (1112); The angle adjustment assembly (1112) comprises a fixing plate (1110) having a side wall at one end fixedly connected to a sixth electric telescopic rod (1113), a telescopic end of the sixth electric telescopic rod (1113) fixedly connected to a U-shaped plate (1114), inner walls at both ends of the U-shaped plate (1114) being rotatably connected to a same round rod (1115), a rod wall of the round rod (1115) being fixedly connected to a side plate (1116), a side wall at one end of the U-shaped plate (1114) being fixedly connected to a second motor (1117), an output end of the second motor (1117) passing through the side wall of the U-shaped plate (1114) being fixedly connected to one end of the round rod (1115), a side wall of the side plate (1116) being fixedly connected to a first fixing frame (1118), and two seventh electric telescopic rods (1119) being symmetrically fixedly connected to inner walls at both ends of the first fixing frame (1118); The telescopic ends of the seventh electric telescopic rod (1119) are fixedly connected to the second clamping plate (1120); the top side wall of the first fixed frame (1118) is rotatably connected to the rotating rod (1121); the rod wall of the rotating rod (1121) is fixedly connected to the second fixed frame (1122); the side wall of the second fixed frame (1122) is symmetrically provided with strip openings (1123) matching the side wall of the first fixed frame (1118); the inner walls at both ends of the second fixed frame (1122) are symmetrically fixedly connected to two eighth electric telescopic rods (1124); the telescopic ends of the two eighth electric telescopic rods (1124) are fixedly connected to the third clamping plate (1125); The front beam fixing assembly (13) comprises a third electric slide rail (131) fixedly connected to the inner wall at the top end of the third groove (12); the side wall at the top end of the third electric slide rail (131) is slidably connected to two third slide plates (132); the side walls at one end of the two third slide plates (132) are each provided with a fourth groove (133); the inner wall of the fourth groove (133) is fixedly connected to a ninth electric telescopic rod (134); the telescopic ends of the ninth electric telescopic rod (134) are fixedly connected to a connecting plate (135); the side wall at the top end of the connecting plate (135) is fixedly connected to a tenth electric telescopic rod (136); the telescopic ends of the tenth electric telescopic rod (136) are fixedly connected to a connecting frame (137); The top side wall of the connection frame (137) is rotatably connected to a bottom plate (138); a fifth groove (139) is provided on the bottom side wall of the bottom plate (138); a slider (1310) is movably connected to the inner wall of the fifth groove (139); an eleventh electric telescopic rod (1311) is fixedly connected to the inner wall of the bottom end of the connection frame (137); the telescopic end of the eleventh electric telescopic rod (1311) is rotatably connected to the bottom side wall of the slider (1310); a connection tube (1312) is fixedly connected to the top side wall of the bottom plate (138); two twelfth electric telescopic rods (1313) are symmetrically fixedly connected to the inner wall of the connection tube (1312); and the telescopic ends of the twelfth electric telescopic rod (1313) are both fixedly connected to a fourth clamping plate (1314).

2. A welding device for a forklift cab frame according to claim 1, characterized in that: A fixed block (1315) is fixedly connected to a side wall at one end of the first fixed frame (1118), a fourth motor (1316) is fixedly connected to a top side wall of the fixed block (1315), and an output end of the fourth motor (1316) is fixedly connected to one end of the rotating rod (1121).

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