CN219465243U - Horizontal H-shaped steel welding table - Google Patents

Abstract

The utility model relates to the technical field of H-shaped steel welding forming, in particular to a horizontal H-shaped steel welding table, which enables webs to be adjusted in height through a lifting platform so as to adapt to flanges with different heights, and enables the flanges to move transversely through a translation device so as to adapt to webs with different widths, so that the adaptability of equipment is improved; the flanges are transported into the equipment through the vertical limiting device, and finished products are transported out of the equipment, so that the labor intensity of operators is reduced, and the practicability of the equipment is improved; the flange is tightly attached to the welding part of the web plate through the auxiliary device, so that the stability of the equipment is improved; the flange and the web are subjected to mobile welding through the welding device, so that the production efficiency of the equipment is improved; the welding device, the fixing device and the conveying device are all arranged on the frame; the welding device further comprises a lifting platform, two groups of translation devices, two groups of vertical limiting devices, two groups of auxiliary devices and four groups of welding devices.

Description

Horizontal H-shaped steel welding table

Technical Field

The utility model relates to the technical field of H-shaped steel welding forming, in particular to a horizontal H-shaped steel welding table.

Background

The production of H-shaped steel is generally divided into hot rolling forming and welding forming, the H-shaped steel formed by hot rolling has stronger stability, higher structural strength and higher relative cost, and is generally produced in a large scale; the H-shaped steel production flexibility of welding forming is better, the steel plate with proper thickness is selected according to production requirements and then cut into the required shape, then the flange, the web plate and other parts of the plate are welded together rapidly, the H-shaped steel can be produced rapidly according to requirements, and the welding accuracy is insufficient due to the fact that manual welding is heavy due to the fact that the volume of raw materials is large.

The utility model patent of China with the publication number of CN201120044441.3 in the prior art relates to an H-shaped steel welding device which comprises a frame, a welding device, a fixing device and a conveying device, wherein the welding process can be automatically completed, and the production efficiency of equipment is improved.

However, the above device has the following problems in practical use: firstly, due to different production requirements, when steel plates with different sizes are used, equipment is difficult to adapt to size change and cannot be processed and welded; secondly, the mode of welding while transporting can lead to the vibration of the steel plate, and the phenomenon of cold joint at the welding position is caused, so that the quality of products is reduced.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the device which can adjust the height of the web plate through the lifting platform so as to adapt to flanges with different heights, and can transversely move the flanges through the translation device so as to adapt to the web plates with different widths, thereby improving the adaptability of the device; the flanges are transported into the equipment through the vertical limiting device, and finished products are transported out of the equipment, so that the labor intensity of operators is reduced, and the practicability of the equipment is improved; the flange is tightly attached to the welding part of the web plate through the auxiliary device, so that the condition of cold joint is reduced, and the stability of the equipment is improved; the flange and the web are welded in a moving way through the welding device, and meanwhile, the multi-point welding is carried out, so that the production time of equipment is reduced, and the production efficiency of the equipment is improved.

The utility model relates to a horizontal H-shaped steel welding table which comprises a frame, a welding device, a fixing device and a conveying device, wherein the welding device, the fixing device and the conveying device are all arranged on the frame; the device also comprises a lifting platform, two groups of translation devices, two groups of vertical limiting devices, two groups of auxiliary devices and four groups of welding devices, wherein the lifting platform can change in height; the translation device can horizontally move; the vertical limiting device is used for transporting the flange and fixing the position of the flange; the auxiliary device compresses the flange and the web; the welding device is used for welding the flange and the web; the web plate can be adjusted in height through the lifting platform so as to adapt to flanges with different heights, and the flanges are transversely moved through the translation device so as to adapt to the web plates with different widths, so that the adaptability of the equipment is improved; the flanges are transported into the equipment through the vertical limiting device, and finished products are transported out of the equipment, so that the labor intensity of operators is reduced, and the practicability of the equipment is improved; the flange is tightly attached to the welding part of the web plate through the auxiliary device, so that the condition of cold joint is reduced, and the stability of the equipment is improved; the flange and the web are welded in a moving way through the welding device, and meanwhile, the multi-point welding is carried out, so that the production time of the equipment is shortened, and the production efficiency of the equipment is improved.

Preferably, the lifting platform comprises a workbench, a plurality of groups of supporting legs, lifting cylinders, a horizontal supporting plate, a threaded rod and supporting nuts, wherein the plurality of groups of supporting legs are connected to the lower end face of the workbench, the lifting cylinders are installed in the middle of the lower end face of the workbench, the moving ends of the lifting cylinders penetrate through the upper end face of the workbench and are connected with the horizontal supporting plate, a group of threaded rods are respectively connected to the front side and the rear side of the lower end face of the horizontal supporting plate, the lower parts of the threaded rods penetrate through the workbench and extend to the lower side of the workbench, the supporting nuts are installed on the threaded rods, and the supporting nuts are located on the upper side of the workbench; the lifting cylinder is controlled to stretch out and draw back, so that the horizontal supporting plate is driven to change the height, after the horizontal supporting plate reaches the required height, the supporting nut is tightly attached to the upper end face of the workbench through rotation of the supporting nut, the whole of the horizontal supporting plate is supported by the supporting nut and the threaded rod, the vertical movement of the horizontal supporting plate enables the device to adapt to the processing of flanges with different eating sizes, and the adaptability and the practicability of the device are improved.

Preferably, the translation device comprises a translation platform, a translation bin, a screw rod, a sliding block, a nut and a crank, wherein the two groups of translation devices are symmetrically arranged at the left part and the right part of the upper end surface of the workbench, the translation platform is arranged on the upper end surface of the workbench through a plurality of groups of sliding rails, the middle part in the workbench is provided with the translation bin, the sliding block is arranged in the translation bin, the upper end surface of the sliding block is connected with the lower end surface of the translation platform, the nut is arranged in the middle of the sliding block, the screw rod is connected with the nut and penetrates through the nut, the left end and the right end of the screw rod are respectively connected with the left end and the right end in the translation bin, and one end of the screw rod penetrates through the left end surface of the workbench and is connected with the crank; the crank is rotated to transmit power to the sliding block through the lead screw and the nut to drive the sliding block to transversely move, so that the transverse moving platform transversely moves, the flange transversely moves, webs with different widths are adapted, and the adaptability of the device is improved.

Preferably, the vertical limit comprises a C-shaped limit box, a top cylinder, a vertical pressing plate, a chain transmission box, a motor and rollers, wherein two groups of vertical limit are symmetrically arranged on two groups of translation devices respectively, the C-shaped limit box is arranged on the upper end face of the transverse moving platform, a plurality of groups of top cylinders are arranged on the upper end face of the C-shaped limit box, the moving ends of the plurality of groups of top cylinders penetrate through the upper end face of the C-shaped limit box and enter the C-shaped limit box to be connected with the vertical pressing plate, a plurality of groups of rollers are arranged at the lower part in the C-shaped limit box, the chain transmission box is arranged at the lower part of the left end face of the C-shaped limit box, the motor is arranged on the left end face of the chain transmission box, the output end of the motor is connected with the input end of the chain transmission box, and a plurality of groups of output ends of the chain transmission box are connected with a plurality of groups of rollers; the motor is started, the motor transmits power to the chain transmission box, the chain transmission box distributes the power to a plurality of groups of rollers to drive the plurality of groups of rollers to rotate, so that the flange is conveyed into the C-shaped limit box or the H-shaped steel output equipment for finishing processing is realized, the top cylinder is controlled to extend to enable the vertical pressing plate to downwards press the flange, vibration and displacement of the flange in the processing process of the equipment are reduced, and the stability and the product quality of the equipment are improved.

Preferably, the auxiliary device comprises a supporting plate, a plurality of groups of auxiliary cylinders and a transverse pressing plate, the two groups of auxiliary devices are symmetrically arranged on the two groups of transverse moving platforms respectively, the supporting plate is arranged on the upper end face of the transverse moving platform, a plurality of groups of rib plates are arranged between the supporting plate and the transverse moving platform, the auxiliary cylinders are arranged on the end faces, far away from the C-shaped limiting boxes, of the supporting plate, and the moving ends of the auxiliary cylinders penetrate through the supporting plate and the C-shaped limiting boxes and enter the C-shaped limiting boxes to be connected with the transverse pressing plate; before welding, the extension of the auxiliary cylinder is controlled to enable the transverse pressing plate to press the flange plate, so that the flange plate is tightly contacted with the web plate, the false welding condition in the welding process is reduced, and the protection performance and stability of the equipment are improved.

Preferably, the welding device comprises a T-shaped sliding rail, a movable trolley, a mounting plate, a movable motor, a gear, a rack, an electric welding machine and an adjustable welding head, wherein the four groups of welding devices are respectively arranged at the upper part and the lower part of the inner sides of the two groups of C-shaped limiting boxes, the T-shaped sliding rail is arranged on the inner side end face of the C-shaped limiting boxes, the movable trolley is arranged on the T-shaped sliding rail and can move on the T-shaped sliding rail, a rectangular hole is formed in the lower end face of the movable trolley, the two groups of mounting plates are arranged on the lower end face of the movable trolley, the gear is arranged between the two groups of mounting plates, the movable motor is arranged on the left end face of the mounting plate, the output end of the movable motor penetrates through the mounting plate and is connected with the gear, the rack is connected with the lower part of the left end of the T-shaped sliding rail, the upper part of the gear penetrates through the rectangular through hole of the movable trolley and is meshed with the rack, the electric welding machine is arranged on the left end face of the movable trolley, and the adjustable welding head is arranged on the upper end face of the electric welding machine; the movable motor is started, the movable motor outputs power to the gear to enable the gear to rotate on the rack, so that the movable trolley moves on the T-shaped sliding rail, the angle of the adjustable welding head is adjusted, the steel plates are welded through the adjustable welding head, and the plurality of groups of welding devices can work simultaneously, so that the working efficiency of equipment and the practicability of the equipment are improved.

Compared with the prior art, the utility model has the beneficial effects that: the web plate can be adjusted in height through the lifting platform so as to adapt to flanges with different heights, and the flanges are transversely moved through the translation device so as to adapt to the web plates with different widths, so that the adaptability of the equipment is improved; the flanges are transported into the equipment through the vertical limiting device, and finished products are transported out of the equipment, so that the labor intensity of operators is reduced, and the practicability of the equipment is improved; the flange is tightly attached to the welding part of the web plate through the auxiliary device, so that the condition of cold joint is reduced, and the stability of the equipment is improved; the flange and the web are welded in a moving way through the welding device, and meanwhile, the multi-point welding is carried out, so that the production time of the equipment is shortened, and the production efficiency of the equipment is improved.

Drawings

FIG. 1 is a schematic elevational view of the present utility model;

FIG. 2 is a schematic left-hand view of the present utility model;

FIG. 3 is a schematic view of a lifting platform structure;

FIG. 4 is a schematic diagram of a translation device;

FIG. 5 is a schematic view of a partially enlarged structure of a welding device;

the reference numerals in the drawings: 1. a work table; 2. a support leg; 3. a lifting cylinder; 4. a horizontal pallet; 5. a threaded rod; 6. a support nut; 7. a traversing platform; 8. a transverse moving bin; 9. a screw rod; 10. a slide block; 11. a nut; 12. a crank; 13. a C-shaped limit box; 14. a top cylinder; 15. a vertical pressing plate; 16. a chain drive box; 17. a motor; 18. a roller; 19. a support plate; 20. rib plates; 21. an auxiliary cylinder; 22. a transverse pressing plate; 23. a T-shaped slide rail; 24. a moving trolley; 25. a mounting plate; 26. a moving motor; 27. a gear; 28. a rack; 29. an electric welding machine; 30. an adjustable weld head.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. This utility model may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Example 1

As shown in fig. 1, 2, 3, 4 and 5, the translation device is mounted on the lifting platform, the vertical limiting device is mounted on the translation device, and the welding device is mounted on the vertical limiting device;

firstly, the lifting cylinder 3 is controlled to stretch out and draw back so as to drive the horizontal supporting plate 4 to change the height, after the horizontal supporting plate 4 reaches the required height, the supporting nut 6 is tightly attached to the upper end face of the workbench 1 by rotating the supporting nut 6 and the threaded rod 5 to support the whole horizontal supporting plate 4, then a web is placed on the upper end face of the horizontal supporting plate 4, one end of a flange is placed in the C-shaped limit box 13, then a motor 17 is started, the motor 17 transmits power to the chain transmission box 16, the power is dispersed to a plurality of groups of rollers 18 by the chain transmission box 16, the plurality of groups of rollers 18 are driven to rotate so as to convey the flange into the C-shaped limit box 13, then the top cylinder 14 is controlled to extend so as to enable the vertical pressing plate 15 to downwards compress the flange, vibration and displacement of the flange in the machining process of equipment are reduced, then the moving motor 26 is started, the moving motor 26 outputs power to the gear 27 to rotate on the rack 28, so that the moving trolley 24 moves on the T-shaped slide rail 23, the angle of the adjustable welding head 30 is adjusted, the steel plate is welded by the adjustable welding head 30, and the plurality of groups of steel plates can be started by the adjustable welding head 30, and the plurality of groups of steel plates are conveyed out of the rack 28, and H can be transported out of the equipment by the rack 28.

The lifting platform comprises a workbench 1, a plurality of groups of supporting legs 2, lifting cylinders 3, a horizontal supporting plate 4, threaded rods 5 and supporting nuts 6, wherein the plurality of groups of supporting legs 2 are connected to the lower end face of the workbench 1, the lifting cylinders 3 are installed in the middle of the lower end face of the workbench 1, the moving ends of the lifting cylinders 3 penetrate through the upper end face of the workbench 1 to be connected with the horizontal supporting plate 4, a group of threaded rods 5 are respectively connected to the front side and the rear side of the lower end face of the horizontal supporting plate 4, the lower parts of the threaded rods 5 penetrate through the workbench 1 to extend to the lower side of the workbench 1, the supporting nuts 6 are installed on the threaded rods 5, and the supporting nuts 6 are located on the upper side of the workbench 1;

the translation device comprises a translation platform 7, a translation bin 8, a lead screw 9, a sliding block 10, a nut 11 and a crank 12, wherein the two groups of translation devices are symmetrically arranged at the left part and the right part of the upper end surface of the workbench 1, the translation platform 7 is arranged on the upper end surface of the workbench 1 through a plurality of groups of sliding rails, the middle part in the workbench 1 is provided with the translation bin 8, the sliding block 10 is arranged in the translation bin 8, the upper end surface of the sliding block 10 is connected with the lower end surface of the translation platform 7, the middle part of the sliding block 10 is provided with the nut 11, the lead screw 9 is connected with the nut 11 and penetrates through the nut 11, the left end and the right end of the lead screw 9 are respectively connected with the left end and the right end of the translation bin 8, and one end of the lead screw 9 penetrates through the left end surface of the workbench 1 and is connected with the crank 12;

the vertical limit comprises a C-shaped limit box 13, a top air cylinder 14, a vertical pressing plate 15, a chain transmission box 16, a motor 17 and rollers 18, wherein two groups of vertical limit are symmetrically arranged on two groups of translation devices respectively, the C-shaped limit box 13 is arranged on the upper end face of the transverse moving platform 7, a plurality of groups of top air cylinders 14 are arranged on the upper end face of the C-shaped limit box 13, the moving ends of the plurality of groups of top air cylinders 14 penetrate through the upper end face of the C-shaped limit box 13 and enter the C-shaped limit box 13 to be connected with the vertical pressing plate 15, a plurality of groups of rollers 18 are arranged at the lower part in the C-shaped limit box 13, the chain transmission box 16 is arranged at the lower part of the left end face of the C-shaped limit box 13, the motor 17 is arranged on the left end face of the chain transmission box 16, the output end of the motor 17 is connected with the input end of the chain transmission box 16, and a plurality of groups of output ends of the chain transmission box 16 are connected with a plurality of groups of rollers 18;

the welding device comprises a T-shaped sliding rail 23, a movable trolley 24, a mounting plate 25, a movable motor 26, a gear 27, a rack 28, an electric welding machine 29 and an adjustable welding head 30, wherein the four groups of welding devices are respectively arranged at the upper part and the lower part of the inner sides of the two groups of C-shaped limiting boxes 13, the T-shaped sliding rail 23 is arranged on the inner side end face of the C-shaped limiting boxes 13, the movable trolley 24 is arranged on the T-shaped sliding rail 23 and can move on the T-shaped sliding rail 23, a rectangular hole is formed in the lower end face of the movable trolley 24, the two groups of mounting plates 25 are arranged on the lower end face of the movable trolley 24, the gear 27 is arranged between the two groups of mounting plates 25, the movable motor 26 is arranged on the left end face of the mounting plate 25, the output end of the movable motor 26 passes through the mounting plate 25 to be connected with the gear 27, the lower part of the left end of the T-shaped sliding rail 23 is connected with the rack 28, the upper part of the gear 27 passes through the rectangular through the through hole of the movable trolley 24 to be meshed with the rack 28, the electric welding machine 29 is arranged on the left end face of the movable trolley 24, and the adjustable welding head 30 is arranged on the upper end face of the electric welding machine 29;

the web plate can be adjusted in height through the lifting platform so as to adapt to flanges with different heights, and the flanges are transversely moved through the translation device so as to adapt to the web plates with different widths, so that the adaptability of the equipment is improved; the flanges are transported into the equipment through the vertical limiting device, and finished products are transported out of the equipment, so that the labor intensity of operators is reduced, and the practicability of the equipment is improved; the flange and the web are welded in a moving way through the welding device, and meanwhile, the multi-point welding is carried out, so that the production time of the equipment is shortened, and the production efficiency of the equipment is improved.

Example 2

The improvement on the basis of the first embodiment comprises an auxiliary device which is arranged on the translation device and is connected with the vertical limiting device;

before welding, controlling the extension of the auxiliary cylinder 21 to enable the transverse pressing plate 22 to press the flange plate, so that the flange plate is in close contact with the web;

the auxiliary device comprises a supporting plate 19, a plurality of groups of auxiliary cylinders 21 and a transverse pressing plate 22, the two groups of auxiliary devices are symmetrically arranged on the two groups of transverse moving platforms 7 respectively, the supporting plate 19 is arranged on the upper end face of the transverse moving platform 7, a plurality of groups of rib plates 20 are arranged between the supporting plate 19 and the transverse moving platform 7, the auxiliary cylinders 21 are arranged on the end face, far away from the C-shaped limiting box 13, of the supporting plate 19, and the moving ends of the auxiliary cylinders 21 penetrate through the supporting plate 19 and the C-shaped limiting box 13 to enter the C-shaped limiting box 13 to be connected with the transverse pressing plate 22;

the flange is tightly attached to the welding part of the web plate through the auxiliary device, so that the condition of cold joint is reduced, and the stability and the product quality of the equipment are improved.

As shown in fig. 1 to 5, in the horizontal H-shaped steel welding table of the present utility model, when the horizontal pallet 4 is at a desired height, the lifting cylinder 3 is controlled to extend and retract to drive the horizontal pallet 4 to change the height, after the horizontal pallet 4 reaches the desired height, the supporting nut 6 is tightly attached to the upper end surface of the table 1 by rotating the supporting nut 6 and the threaded rod 5 to support the whole body of the horizontal pallet 4, then the web is placed on the upper end surface of the horizontal pallet 4, then one end of the flange is placed in the C-shaped limit box 13, then the motor 17 is started, the motor 17 transmits power to the chain transmission box 16, the chain transmission box 16 distributes power to the plurality of groups of rollers 18 to drive the plurality of groups of rollers 18 to rotate, thereby conveying the flange into the C-shaped limit box 13, then the top cylinder 14 is controlled to extend to press the vertical pressing plate 15 downwards to reduce vibration and displacement of the flange in the processing process of the apparatus, then the auxiliary cylinder 21 is controlled to extend to press the lateral pressing plate 22 to tightly contact the flange with the web, then the motor 26 is started, the power is output to the gear 27 is driven to rotate the gear 27, the gear 27 is driven to rotate the gear 28, thus the plurality of groups of racks 24 are driven to move the motor 24, and the welding heads are driven to move the plurality of groups of racks 30 to weld the steel plates 30 by the welding table, and the welding table is welded by the welding apparatus.

The lifting cylinder 3, the top cylinder 14, the auxiliary cylinder 21, the electric welding machine 29, the adjustable welding head 30, the mobile motor 26, the gear 27, the rack 28, the motor 17 and the chain transmission box 16 of the horizontal H-shaped steel welding table are purchased on the market, and can be installed and operated by a person skilled in the art according to the attached using instruction without creative labor of the person skilled in the art.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (6)

1. The horizontal H-shaped steel welding table comprises a frame, a welding device, a fixing device and a conveying device, wherein the welding device, the fixing device and the conveying device are all arranged on the frame; the device is characterized by further comprising a lifting platform, two groups of translation devices, two groups of vertical limiting devices, two groups of auxiliary devices and four groups of welding devices, wherein the lifting platform can change in height; the translation device can horizontally move; the vertical limiting device is used for transporting the flange and fixing the position of the flange; the auxiliary device compresses the flange and the web; the welding device welds the flange and the web.

2. The horizontal H-shaped steel welding table according to claim 1, wherein the lifting platform comprises a workbench (1), a plurality of groups of supporting legs (2), lifting cylinders (3), a horizontal supporting plate (4), threaded rods (5) and supporting nuts (6), the plurality of groups of supporting legs (2) are connected to the lower end face of the workbench (1), the lifting cylinders (3) are installed in the middle of the lower end face of the workbench (1), the movable ends of the lifting cylinders (3) penetrate through the upper end face of the workbench (1) to be connected with the horizontal supporting plate (4), a plurality of groups of threaded rods (5) are respectively connected to the front side and the rear side of the lower end face of the horizontal supporting plate (4), the lower portions of the threaded rods (5) penetrate through the workbench (1) to extend to the lower side of the workbench (1), the supporting nuts (6) are installed on the threaded rods (5), and the supporting nuts (6) are located on the upper side of the workbench (1).

3. The horizontal H-shaped steel welding table according to claim 2, wherein the translation device comprises a translation platform (7), a translation bin (8), a screw rod (9), a sliding block (10), a nut (11) and a crank (12), the two groups of translation devices are symmetrically arranged at the left part and the right part of the upper end face of the workbench (1), the translation platform (7) is arranged on the upper end face of the workbench (1) through a plurality of groups of sliding rails, the middle part of the workbench (1) is provided with the translation bin (8), the sliding block (10) is arranged in the translation bin (8), the upper end face of the sliding block (10) is connected with the lower end face of the translation platform (7), a nut (11) is arranged in the middle of the sliding block (10), the screw rod (9) is connected with the nut (11) and penetrates through the nut (11), the left end and the right end of the screw rod (9) are respectively connected with the left end and the right end of the translation bin (8), and one end of the sliding block penetrates the left end face of the workbench (1) to be connected with the crank (12).

4. A horizontal H-section steel welding table as claimed in claim 3, characterized in that the vertical limit comprises a C-shaped limit box (13), a top cylinder (14), a vertical pressing plate (15), a chain transmission box (16), a motor (17) and rollers (18), the two sets of vertical limit are symmetrically installed on the two sets of translation devices respectively, the C-shaped limit box (13) is installed on the upper end face of the traversing platform (7), a plurality of groups of top cylinders (14) are installed on the upper end face of the C-shaped limit box (13), the moving ends of the plurality of groups of top cylinders (14) penetrate through the upper end face of the C-shaped limit box (13) to enter the inside of the C-shaped limit box (13) to be connected with the vertical pressing plate (15), a plurality of groups of rollers (18) are installed at the lower part in the C-shaped limit box (13), the chain transmission box (16) is installed at the lower part of the left end face of the C-shaped limit box (13), the motor (17) is installed on the left end face of the chain transmission box (16), the output end of the motor (17) is connected with the input end of the chain transmission box (16), and the output end of the motor (16) is connected with the output end of the plurality of groups of rollers (18).

5. A horizontal H-section steel welding table as claimed in claim 3, characterized in that the auxiliary means comprises a support plate (19), a plurality of groups of auxiliary cylinders (21) and a transverse pressing plate (22), the two groups of auxiliary means are symmetrically arranged on the two groups of transverse moving platforms (7) respectively, the support plate (19) is arranged on the upper end face of the transverse moving platform (7), a plurality of groups of rib plates (20) are arranged between the support plate (19) and the transverse moving platform (7), the auxiliary cylinders (21) are arranged on the end face, far away from the C-shaped limiting box (13), of the support plate (19), and the movable ends of the auxiliary cylinders (21) penetrate through the support plate (19) and the C-shaped limiting box (13) to enter the C-shaped limiting box (13) to be connected with the transverse pressing plate (22).

6. The welding bench for horizontal H-shaped steel according to claim 4, wherein the welding device comprises a T-shaped slide rail (23), a movable trolley (24), a mounting plate (25), a movable motor (26), a gear (27), a rack (28), an electric welding machine (29) and an adjustable welding head (30), wherein the four groups of welding devices are respectively arranged at the upper part and the lower part of the inner side of two groups of C-shaped limit boxes (13), the T-shaped slide rail (23) is arranged on the inner side end face of the C-shaped limit boxes (13), the movable trolley (24) is arranged on the T-shaped slide rail (23) and can move on the T-shaped slide rail (23), a rectangular hole is formed in the lower end face of the movable trolley (24), two groups of mounting plates (25) are arranged on the lower end face of the movable trolley (24), the gear (27) is arranged between the two groups of mounting plates (25), the movable motor (26) is arranged on the left end face of the mounting plate (25), the output end of the movable motor (26) penetrates through the mounting plate (25) to be connected with the gear (27), the lower left end of the T-shaped slide rail (23) is connected with the rectangular hole (28), the upper end face of the gear (24) penetrates through the rectangular hole (24) to be meshed with the upper end face of the movable trolley (29), an adjustable welding head (30) is arranged on the upper end surface of the electric welding machine (29).