A welding device for welding small special-shaped H-shaped steel

Abstract

The present application relates to the technical field of welding machine, and discloses a welding device for welding small special-shaped H-shaped steel, which comprises a welding seat assembly, a clamping assembly is arranged on the welding seat assembly, the clamping assembly comprises a support and a rotating bar, the middle section of the rotating bar is movably installed on the support, and the upper and lower ends of the rotating bar are movably installed with pressing wheels, the diameters of the upper and lower pressing wheels are consistent, the pressing wheels are used for pressing the web plate, an inner groove is further arranged on the outer side of the rotating bar, a corrugated sleeve is installed on the outer side of the inner groove of the rotating bar, a pressing plate is fixedly installed on the outer side of the corrugated sleeve, when the upper and lower pressing wheels contact and press the web plate, the inclination angle of the rotating bar is consistent with the inclination angle of the web plate, after the inner groove is filled, the extension of the corrugated sleeve enables the pressing plate to contact and press the web plate in the vertical direction of the inclination surface of the web plate, a driving assembly is arranged on the welding seat assembly, and a welding assembly is installed at the execution end of the driving assembly, the device can conveniently adjust the angle of the welding gun, and prevents the occurrence of the situation that the special-shaped H-shaped steel is not penetrated on one side.

Description

Technical Field

[0001] This invention relates to the field of welding machine technology, and more specifically to a welding apparatus for welding small, irregularly shaped H-beams. Background Technology

[0002] H-beams are generally composed of two flanges and one web. During welding, the flanges are placed symmetrically and vertically on both sides of the web and fixed, and then welded using a plasma arc welding machine. However, the flanges of irregular H-beams are often not symmetrically or perpendicularly welded to both sides of the web. Therefore, when using existing plasma arc welding equipment to process and manufacture irregular H-beams, the following shortcomings still exist. First, when welding irregular H-beams using existing technology, the angle between the flange and the web is not necessarily 90 degrees. Traditional welding equipment often uses a plasma arc welding gun at a 45-degree angle for welding. When the angle between the flange and the web is not 90 degrees, using a traditional welding gun head often results in one side of the irregular H-beam not being fully penetrated. Secondly, the ordinary vertical clamping rollers used in the plasma arc welding equipment under the existing technology cannot fit the inclined blade plate, and the clamping force is not perpendicular to the inclined blade plate. Third, existing plasma arc welding equipment cannot absorb the fumes at the weld joint between the flange and the web in a timely manner, resulting in the fumes generated during welding polluting the working environment. Therefore, in order to solve the above problems, there is a need to provide a welding device for welding small irregular H-beams. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a welding device for welding small irregular H-beams, so as to solve the problems existing in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a welding device for welding small irregular H-beams, comprising a welding base assembly, wherein the welding base assembly is provided with a clamping assembly; The clamping assembly includes a bracket and a rotating bar. The middle section of the rotating bar is movably mounted on the bracket, and pressure rollers are movably mounted on both the upper and lower ends of the rotating bar. The diameters of the upper and lower pressure rollers are the same, and the pressure rollers press against the web plate. The outer side of the rotating bar is also provided with an inner groove. A corrugated sleeve is installed on the outer side of the inner groove of the rotating bar. A pressure plate is fixedly installed on the outer side of the corrugated sleeve. When the upper and lower pressure rollers contact and press the web, the tilt angle of the rotating bar is consistent with the angle of the web slope. After the inner groove is filled, the corrugated sleeve extends so that the pressure plate contacts and presses along the vertical direction of the web slope.

[0005] Furthermore, the welding socket assembly is provided with a driving component, the driving component has a welding component installed at its actuating end, and the welding socket assembly is also provided with a dust collection component.

[0006] Furthermore, the welding base assembly includes a welding station with seat edges on both sides, a wing plate is placed on the welding station, and a web plate is provided on the wing plate.

[0007] Furthermore, the drive assembly includes a longitudinal stator assembly of a linear motor, which is mounted on the seat side. A longitudinal moving plate of a linear motor is slidably mounted on the longitudinal stator assembly. Each longitudinal moving plate of the linear motor has a vertical plate mounted on it. A transverse stator assembly of a linear motor is fixedly mounted between the vertical plates. A transverse moving plate of a linear motor is slidably mounted on the transverse stator assembly of the linear motor. A vertical stator assembly of a linear motor is mounted on the front side of the transverse moving plate of the linear motor. A vertical moving plate of a linear motor is slidably mounted on the vertical stator assembly of the linear motor. The vertical moving plate of the linear motor is fixedly connected to the welding assembly.

[0008] Furthermore, the welding assembly includes a curved cavity component, which is fixedly connected to the vertical moving plate of the linear motor. The inner side of the curved cavity component is provided with a side shell, and a curved groove is formed on the curved cavity component. A curved rod is movably sleeved in the curved cavity component. A plasma arc welding gun is fixedly installed at the bottom end of the curved rod. A connecting shaft is fixedly connected to the outer side of the curved rod. A connecting shaft passes through the curved groove and is fixedly connected to a connecting rod. A central shaft is fixedly sleeved at the end of the connecting rod. The central shaft is located at the center of the movement trajectory of the curved cavity component and the curved rod. A servo motor is fixedly installed on the outer side of the side shell, and the drive end of the servo motor is fixedly connected to the central shaft.

[0009] Furthermore, the clamping assembly includes a rail groove, which is formed on the inner side of the seat. A central shaft block is installed in the middle section of the rail groove. Shaft plates are installed at both the front and rear ends of the rail groove. Clamping screws are movably sleeved between the shaft plates at the front and rear of the rail groove and the central shaft block. A clamping motor is connected to the end of the shaft of each clamping screw. A moving slide is threaded onto the clamping screw, and the moving slide is movably sleeved in the rail groove.

[0010] Furthermore, the sliding bar is fixedly connected to a bracket, and a rotating bar is movably mounted on the bracket via a shaft. Pressure rollers are movably mounted on both the upper and lower ends of the rotating bar via shafts.

[0011] Furthermore, telescopic rods are installed at both the upper and lower ends of the sliding strip, and end plates are fixedly connected to the shaft ends of the telescopic rods. A corrugated shell is also connected between the sliding strip and the end plates. An adjusting screw is threadedly sleeved on the upper end of the end plate, and an upper curved block is movably sleeved on the shaft end of the adjusting screw through a bearing. The upper curved block is in contact with the curved surface of the upper pressure roller. An elastic telescopic shaft is connected to the lower end of the end plate, and a lower curved block is connected to the shaft of the elastic telescopic shaft. The lower curved block is in contact with the curved surface of the lower pressure roller.

[0012] Furthermore, the inner grooves of the rotating bar are connected by a connecting pipe, a liquid tank is fixedly installed on the outside of the welding station, a pressure pump is provided in the liquid tank, the output end of the pressure pump in the liquid tank is connected to a liquid pipe, and the pipe of the liquid pipe is connected to the connecting pipe.

[0013] Furthermore, the dust collection assembly includes clamping blocks located on both sides of the wing plate. The clamping blocks are driven in the same way as the moving slide bar. A dust collection chamber is provided on the upper side of the clamping blocks. A suction groove is provided on the end face of the dust collection chamber of the clamping blocks near the web plate. A filter plate is installed in the clamping blocks. An exhaust fan is installed on the outside of the welding station. The suction end of the exhaust fan is connected to the dust collection chamber of the clamping blocks.

[0014] The technical effects and advantages of this invention are as follows: When the device is in use, if it is necessary to adjust the welding angle of the plasma arc welding gun, the servo motor drives the central shaft to swing the connecting rod. The swinging of the connecting rod causes the crank to rotate in the curved cavity, thereby adjusting the welding angle of the bottom plasma arc welding gun. In this way, the device can conveniently adjust the welding gun angle when welding irregular H-beams with inclined webs, preventing the irregular H-beams from being incompletely welded on one side. By adjusting the adjusting screws on both sides of the web plate, the tilt angle of the upper and lower pressure rollers is made consistent with the tilt angle of the side of the web plate. Then, the clamping motor drives the clamping screw to rotate, thereby driving the moving slide bar to move towards the web plate, so that the pressure rollers on the front and rear sides of the web plate clamp the web plate. When adjusting the tilt angle of the rotating bar, the telescopic rod compensates for the change in the vertical movement of the pressure roller. After the wing plate is placed on the welding platform, the clamping blocks on both sides are driven to clamp the wing plate. Since its driving method is the same as that of the sliding bar, its driving structure will not be described in detail in this embodiment. During the welding process of the web plate and the wing plate, the exhaust fan is started to generate negative pressure in the dust collection chamber of the clamping block. The fumes generated during the welding process are sucked into the dust collection chamber from the suction groove. The dust particles are intercepted and filtered by the filter plate, and the purified gas is discharged to the outside through the exhaust fan. The device improves its environmental protection performance in the above way. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the drive component structure of the present invention; Figure 3 This is a schematic diagram of the welding assembly structure of the present invention; Figure 4 This is a schematic diagram of the clamping component structure of the present invention; Figure 5 This is a schematic diagram of the pressure roller structure of the present invention; Figure 6 This is a schematic diagram of the pressure plate structure of the present invention; Figure 7 This is a schematic diagram of the liquid tank structure of the present invention; Figure 8 This is a schematic diagram of the dust collection component structure of the present invention.

[0016] The attached figures are labeled as follows: 1. Welding base assembly; 101. Welding station; 102. Seat edge; 103. Wing plate; 104. Web plate; 2. Drive assembly; 201. Linear motor longitudinal stator assembly; 202. Linear motor longitudinal mover plate; 203. Vertical plate; 204. Linear motor transverse stator assembly; 205. Linear motor transverse mover plate; 206. Linear motor vertical stator assembly; 207. Linear motor vertical mover plate; 3. Welding assembly; 301. Curved cavity component; 302. Side shell; 303. Curved groove; 304. Curved rod; 305. Plasma arc welding torch; 306. Connecting shaft; 307. Connecting rod; 308. Central shaft; 309. 4. Servo motor; 4. Clamping assembly; 401. Rail groove; 402. Central shaft block; 403. Clamping screw; 404. Clamping motor; 405. Motion slide bar; 406. Bracket; 407. Rotary bar; 408. Pressure roller; 409. Telescopic rod; 410. End plate; 411. Corrugated housing; 412. Adjusting screw; 413. Upper curved block; 414. Elastic telescopic shaft; 415. Lower curved block; 416. Corrugated sleeve; 417. Pressure plate; 418. Connecting pipe; 419. Liquid tank; 420. Liquid pipe; 5. Dust collection assembly; 501. Clamping block; 502. Suction groove; 503. Filter plate; 504. Air pipe; 505. Exhaust fan. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The welding device for welding small irregular H-beams involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Reference Figure 1The present invention provides a welding device for welding small irregular H-beams, including a welding base assembly 1, a driving assembly 2 on the welding base assembly 1, a welding assembly 3 installed on the execution end of the driving assembly 2, a clamping assembly 4 on the welding base assembly 1, and a dust collection assembly 5 on the welding base assembly 1. When using the device, the wing plate of the irregular H-beam is placed on the welding base assembly 1. The dust collection assembly 5 drives the wing plate to clamp and fix it. After adjusting the clamping angle of the clamping assembly 4, the clamping assembly 4 drives the web plate placed on the welding base assembly 1 to clamp and fix it. The welding assembly 3 performs welding processing on the wing plate and the web plate. The drive assembly 2 is used to drive and adjust the position of the welding assembly 3. The specific structure and working principle of each of the above components will be explained in detail later.

[0019] Reference Figure 2 The welding base assembly 1 includes a welding station 101, with seat edges 102 on both sides of the welding station 101, a wing plate 103 placed on the welding station 101, and a web plate 104 provided on the wing plate 103. The drive assembly 2 includes a longitudinal stator assembly 201 of a linear motor, which is mounted on the seat side 102. A longitudinal moving plate 202 of a linear motor is slidably mounted on the longitudinal stator assembly 201. Each longitudinal moving plate 202 is mounted with a vertical plate 203. A transverse stator assembly 204 of a linear motor is fixedly mounted between the vertical plates 203. A transverse moving plate 205 of a linear motor is slidably mounted on the transverse stator assembly 204. A vertical stator assembly 206 of a linear motor is mounted on the front side of the transverse moving plate 205. A vertical moving plate 207 of a linear motor is slidably mounted on the vertical stator assembly 206. The vertical moving plate 207 of the linear motor is fixedly connected to the welding assembly 3. When the device is in use, the longitudinal stator group 201 of the linear motor on both sides synchronously drives the longitudinal moving plate 202 of the linear motor to move, thereby driving the vertical plate 203 to move longitudinally. The transverse stator group 204 of the linear motor drives the transverse moving plate 205 of the linear motor to move laterally. The vertical stator group 206 of the linear motor drives the vertical moving plate 207 of the linear motor to move vertically. In the above manner, the welding assembly 3 is driven to move freely in three directions. Since linear motors are a common and well-known technology in the field of technical personnel, the specific structure and operating principle of linear motors will not be described in detail in this embodiment.

[0020] Reference Figure 3The welding assembly 3 includes a curved cavity 301, which is fixedly connected to the vertical moving plate 207 of the linear motor. The inner side of the curved cavity 301 is provided with a side shell 302. A curved groove 303 is opened on the curved cavity 301. A curved rod 304 is movably sleeved in the curved cavity 301. A plasma arc welding gun 305 is fixedly installed at the bottom end of the curved rod 304. A connecting shaft 306 is fixedly connected to the outer side of the curved rod 304. A connecting rod 307 is fixedly connected to the connecting shaft 306 through the curved groove 303. A central shaft 308 is fixedly sleeved at the end of the connecting rod 307. The central shaft 308 is located at the center of the movement trajectory of the curved cavity 301 and the curved rod 304. A servo motor 309 is fixedly installed on the outer side of the side shell 302. The drive end of the servo motor 309 is fixedly connected to the central shaft 308. When the device is in use, if it is necessary to adjust the welding angle of the plasma arc welding torch 305, the servo motor 309 drives the central shaft 308 to swing the connecting rod 307. The swing of the connecting rod 307 causes the crank 304 to rotate in the curved cavity 301, thereby adjusting the welding angle of the bottom plasma arc welding torch 305. In this way, the device can conveniently adjust the welding torch angle when welding irregular H-beams with inclined webs, preventing the irregular H-beams from being incompletely welded on one side.

[0021] Reference Figures 4-7 The clamping assembly 4 includes a rail groove 401, which is formed on the inner side of the seat edge 102. A central shaft block 402 is installed in the middle section of the rail groove 401. Shaft plates are installed at both the front and rear ends of the rail groove 401. Clamping screws 403 are movably sleeved between the front and rear shaft plates of the rail groove 401 and the central shaft block 402. A clamping motor 404 is connected to the end of the shaft of the clamping screw 403. A moving slide 405 is threaded onto the clamping screw 403. The moving slide 405 is movably sleeved in the rail groove 401. A bracket 406 is fixedly connected to the moving slide 405. A rotating bar 407 is movably mounted on the bracket 406 via a shaft. The middle section of the rotating bar 407 is movably mounted on the bracket 406. The upper and lower ends of the rotating bar 407 are movably mounted via shafts. There is a pressure roller 408, and the upper and lower individual rollers of the pressure roller 408 have the same wheel diameter. The upper and lower ends of the moving slide 405 are equipped with telescopic rods 409. The ends of the shafts of the telescopic rods 409 are fixedly connected to end plates 410. A corrugated shell 411 is also connected between the moving slide 405 and the end plate 410. The individual at the upper end of the end plate 410 is threadedly connected to an adjusting screw 412. The end of the shaft of the adjusting screw 412 is movably connected to an upper curved patch 413 through a bearing. The upper curved patch 413 is in contact with the curved surface of the upper pressure roller 408. The individual at the lower end of the end plate 410 is connected to an elastic telescopic shaft 414. The shaft of the elastic telescopic shaft 414 is connected to a lower curved patch 415. The lower curved patch 415 is in contact with the curved surface of the lower pressure roller 408. The outer side of the rotating bar 407 is also provided with an inner groove. A corrugated sleeve 416 is installed on the outer side of the inner groove of the rotating bar 407. A pressure plate 417 is fixedly installed on the outer side of the corrugated sleeve 416. A connecting pipe 418 is connected between the inner grooves of the rotating bar 407. A liquid tank 419 is fixedly installed on the outer side of the welding station 101. A pressure pump (not shown in the figure) is provided in the liquid tank 419. The output end of the pressure pump in the liquid tank 419 is connected to a liquid pipe 420. The pipe of the liquid pipe 420 is connected to the connecting pipe 418. Pressure plate 417 is made of copper. When in use, the device adjusts the adjusting screws 412 on both sides of the web plate 104 so that the tilt angle of the upper and lower pressure rollers 408 is consistent with the tilt angle of the side of the web plate 104. Then, the clamping motor 404 drives the clamping screw 403 to rotate, thereby driving the moving slide bar 405 to move towards the web plate 104, so that the pressure rollers 408 on the front and rear sides of the web plate 104 clamp the web plate 104. When adjusting the tilt angle of the rotating bar 407, the telescopic rod 409 compensates for the change in the vertical movement of the pressure rollers 408. Since the upper and lower pressure rollers 408 have the same diameter, when the upper and lower pressure rollers 408 contact and press the outer side of the web plate 104, the tilt angle of the rotating bar 407 is the same as the tilt angle of the outer side of the web plate 104. At this time, the pressure pump injects the coolant in the liquid tank 419 into the inner groove of the rotating bar 407 through the liquid pipe 420, and causes the corrugated sleeve 416 to extend along the vertical direction of the outer side of the web plate 104 until the pressure plate 417 contacts and presses the side of the web plate 104. In this way, the inclined surface of the web plate 104 is subjected to a pressing force along the vertical direction of the surface, and the pressure plate 417, together with the coolant in the inner groove, conducts heat and dissipates heat on the web plate 104, so that it cools down quickly after welding.

[0022] Reference Figure 8 The dust collection component 5 includes a clamping block 501, which is located on both sides of the wing plate 103. The driving method of the clamping block 501 is the same as that of the motion slide bar 405. A dust collection chamber is provided on the upper side of the clamping block 501. A suction groove 502 is provided on the end face of the dust collection chamber of the clamping block 501 near the web plate 104. A filter plate 503 is installed in the clamping block 501. An exhaust fan 505 is installed on the outside of the welding station 101. The suction end of the exhaust fan 505 is connected to the dust collection chamber of the clamping block 501. When the device is in use, after the wing plate 103 is placed on the welding station 101, the clamping blocks 501 on both sides are driven to clamp the wing plate 103. Since its driving method is the same as that of the moving slide bar 405, its driving structure will not be described in detail in this embodiment. During the welding process of the web plate 104 and the wing plate 103, the exhaust fan 505 is started to generate negative pressure in the dust collection chamber of the clamping block 501. The fumes generated during the welding process are sucked into the dust collection chamber from the suction groove 502. The dust particles are intercepted and filtered by the filter plate 503. The purified gas is discharged to the outside through the exhaust fan 505. The device improves its environmental protection performance in the above way.

[0023] The working principle of this invention is as follows: When the welding angle of the plasma arc welding torch 305 needs to be adjusted during use, the servo motor 309 drives the central shaft 308 to swing the connecting rod 307. The swinging of the connecting rod 307 causes the crank rod 304 to rotate in the curved cavity 301, thereby adjusting the welding angle of the bottom plasma arc welding torch 305. In this way, the device can conveniently adjust the welding torch angle when welding irregular H-beams with inclined webs, preventing the irregular H-beams from being incompletely welded on one side. By adjusting the adjusting screws 412 on both sides of the web plate 104, the tilt angle of the upper and lower pressure rollers 408 is made consistent with the tilt angle of the side of the web plate 104. Then, the clamping motor 404 drives the clamping screw 403 to rotate, thereby driving the moving slide bar 405 to move towards the web plate 104, so that the pressure rollers 408 on the front and rear sides of the web plate 104 clamp the web plate 104. When adjusting the tilt angle of the rotating bar 407, the telescopic rod 409 compensates for the change in the vertical movement of the pressure rollers 408. Since the upper and lower pressure rollers 408 have the same wheel diameter, when the upper and lower pressure rollers 408 contact and press the outer side of the web plate 104, the tilt angle of the rotating bar 407 is the same as the tilt angle of the outer side of the web plate 104. At this time, the pressure pump injects the coolant in the liquid tank 419 into the inner groove of the rotating bar 407 through the liquid pipe 420, and causes the corrugated sleeve 416 to extend along the vertical direction of the outer side of the web plate 104 until the pressure plate 417 contacts and presses the side of the web plate 104. In this way, the inclined surface of the web plate 104 is subjected to a pressing force along the vertical direction of the surface, and the pressure plate 417, together with the coolant in the inner groove, conducts heat and dissipates heat on the web plate 104, so that it cools down quickly after welding. After the wing plate 103 is placed on the welding station 101, the clamping blocks 501 on both sides are driven to clamp the wing plate 103. Since its driving method is the same as that of the moving slide bar 405, its driving structure will not be described in detail in this embodiment. During the welding process of the web plate 104 and the wing plate 103, the exhaust fan 505 is started to generate negative pressure in the dust collection chamber of the clamping block 501. The fumes generated during the welding process are sucked into the dust collection chamber from the suction groove 502. The dust particles are intercepted and filtered by the filter plate 503. The purified gas is discharged to the outside through the exhaust fan 505. The device improves its environmental protection performance in the above way.

[0024] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding apparatus for welding small irregular H-beams, comprising a welding base assembly (1), characterized in that: The welding base assembly (1) is provided with a clamping assembly (4); The clamping assembly (4) includes a bracket (406) and a rotating bar (407). The middle section of the rotating bar (407) is movably mounted on the bracket (406). Pressure rollers (408) are movably mounted on both the upper and lower ends of the rotating bar (407). The diameters of the upper and lower pressure rollers (408) are the same. The pressure rollers (408) press against the web plate. The outer side of the rotating bar (407) is also provided with an inner groove. A corrugated sleeve (416) is installed on the outer side of the inner groove of the rotating bar (407). A pressure plate (417) is fixedly installed on the outer side of the corrugated sleeve (416). When the upper and lower pressure rollers (408) contact and press the web, the tilt angle of the rotating bar (407) is consistent with the angle of the inclined surface of the web. After the inner groove is filled, the corrugated sleeve (416) extends so that the pressure plate (417) contacts and presses along the vertical direction of the inclined surface of the web.

2. The welding apparatus for welding small irregular H-beams according to claim 1, characterized in that: The welding base assembly (1) is provided with a drive assembly (2), the drive assembly (2) is equipped with a welding assembly (3) at its execution end, and the welding base assembly (1) is also provided with a dust collection assembly (5).

3. The welding apparatus for welding small irregular H-beams according to claim 2, characterized in that: The welding base assembly (1) includes a welding station (101), with seat edges (102) on both sides of the welding station (101), a wing plate (103) placed on the welding station (101), and a web plate (104) provided on the wing plate (103).

4. The welding apparatus for welding small irregular H-beams according to claim 3, characterized in that: The drive assembly (2) includes a longitudinal stator assembly (201) of a linear motor. The longitudinal stator assembly (201) of the linear motor is mounted on the seat side (102). A longitudinal moving plate (202) of the linear motor is slidably mounted on the longitudinal stator assembly (201). A vertical plate (203) is mounted on each of the longitudinal moving plates (202). A transverse stator assembly (204) of the linear motor is fixedly mounted between the vertical plates (203). A transverse moving plate (205) of the linear motor is slidably mounted on the transverse stator assembly (204). A vertical stator assembly (206) of the linear motor is mounted on the front side of the transverse moving plate (205). A vertical moving plate (207) of the linear motor is slidably mounted on the vertical stator assembly (206). The vertical moving plate (207) of the linear motor is fixedly connected to the welding assembly (3).

5. A welding apparatus for welding small, irregularly shaped H-beams according to claim 4, characterized in that: The welding assembly (3) includes a curved cavity (301), which is fixedly connected to the vertical moving plate (207) of the linear motor. A side shell (302) is provided on the inner side of the curved cavity (301), and a curved groove (303) is provided on the curved cavity (301). A curved rod (304) is movably sleeved in the curved cavity (301), and a plasma arc welding gun (305) is fixedly installed at the bottom end of the curved rod (304). The outer side of the curved rod (304)... A connecting shaft (306) is fixedly connected to the side. The connecting shaft (306) passes through the curved groove (303) and is fixedly connected to a connecting rod (307). A central shaft (308) is fixedly sleeved at the end of the connecting rod (307). The central shaft (308) is located at the center of the motion trajectory of the curved cavity (301) and the curved rod (304). A servo motor (309) is fixedly installed on the outer side of the side shell (302). The drive end of the servo motor (309) is fixedly connected to the central shaft (308).

6. A welding apparatus for welding small, irregularly shaped H-beams according to claim 5, characterized in that: The clamping assembly (4) includes a rail groove (401), which is opened on the inner side of the seat edge (102). A central shaft block (402) is installed in the middle section of the rail groove (401). A shaft plate is installed at both the front and rear ends of the rail groove (401). A clamping screw (403) is movably sleeved between the shaft plate at the front and rear of the rail groove (401) and the central shaft block (402). A clamping motor (404) is connected to the end of the shaft of the clamping screw (403). A moving slide (405) is threadedly sleeved on the clamping screw (403). The moving slide (405) is movably sleeved in the rail groove (401).

7. A welding apparatus for welding small, irregularly shaped H-beams according to claim 6, characterized in that: The motion slide (405) is fixedly connected to a bracket (406), and a rotating bar (407) is movably mounted on the bracket (406) via a shaft. Pressure rollers (408) are movably mounted on the upper and lower ends of the rotating bar (407) via shafts.

8. A welding apparatus for welding small, irregularly shaped H-beams according to claim 7, characterized in that: The upper and lower ends of the motion slide (405) are equipped with telescopic rods (409), and the ends of the shafts of the telescopic rods (409) are fixedly connected to end plates (410). A corrugated shell (411) is also connected between the motion slide (405) and the end plates (410). An adjusting screw (412) is threadedly connected to the upper end of the end plate (410). An upper curved block (413) is movably connected to the end of the shaft of the adjusting screw (412) through a bearing. The upper curved block (413) is in contact with the curved surface of the upper pressure roller (408). An elastic telescopic shaft (414) is connected to the lower end of the end plate (410). A lower curved block (415) is connected to the shaft of the elastic telescopic shaft (414). The lower curved block (415) is in contact with the curved surface of the lower pressure roller (408).

9. A welding apparatus for welding small, irregularly shaped H-beams according to claim 8, characterized in that: The inner grooves of the rotating bar (407) are connected by a connecting pipe (418). A liquid tank (419) is fixedly installed on the outside of the welding station (101). A pressure pump is provided in the liquid tank (419). The output end of the pressure pump in the liquid tank (419) is connected to a liquid pipe (420). The pipe of the liquid pipe (420) is connected to the connecting pipe (418).

10. A welding apparatus for welding small, irregularly shaped H-beams according to claim 9, characterized in that: The dust collection assembly (5) includes a clamping block (501), which is located on both sides of the wing plate (103). The clamping block (501) is driven in the same way as the motion slide bar (405). A dust collection chamber is provided on the upper side of the clamping block (501). A suction groove (502) is provided on the end face of the dust collection chamber of the clamping block (501) near the web plate (104). A filter plate (503) is installed in the clamping block (501). An exhaust fan (505) is installed on the outside of the welding station (101). The suction end of the exhaust fan (505) is connected to the dust collection chamber of the clamping block (501).

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