Hot-rolled channel steel butt welding equipment and welding process thereof

Abstract

The invention relates to the technical field of channel steel welding, and discloses hot-rolled channel steel butt welding equipment and a welding process thereof.The hot-rolled channel steel butt welding equipment comprises an operation table, and an adjusting roller and a rotating disc are rotationally installed on a welding station of the operation table. Through precise cooperation of the combined grooves of the adjusting rollers, the spot welding gun stably moves downwards to a welding station along a precise track, the problems of welding spot deviation, welding skips and the like caused by positioning deviation are effectively avoided, meanwhile, based on the innovative design of gear meshing transmission and the vortex-shaped linear guide rail, after one-time spot welding is completed, the welding efficiency is greatly improved, and the welding quality is improved. The spot welding gun can be accurately driven to be switched to the next station in order, seamless connection of the spot welding process is ensured, and the welding period is greatly shortened; besides, due to the special self-adaptive encryption spot welding function of the equipment, the spot welding distance can be automatically adjusted in a high-stress area in the center of a welding seam according to the stress distribution characteristic of channel steel, the welding spot density is increased, the mechanical property of a welding structure is optimized in a targeted mode, the anti-fatigue capacity and the bearing strength of a welding joint are effectively improved, and the high-strength application requirement of engineering is fully met.

Description

Technical Field

[0001] This invention belongs to the field of channel steel welding technology, specifically, it relates to a hot-rolled channel steel butt welding equipment and its welding process. Background Technology

[0002] Butt welding of hot-rolled channel steel is widely used in steel structure manufacturing, construction engineering and other fields.

[0003] Currently, existing hot-rolled channel steel butt welding equipment suffers from poor continuity in the spot welding process, often requiring frequent manual adjustments to the spot welding gun position, resulting in low automation and low production efficiency. Furthermore, the welding process typically employs uniform spot welding or a fixed weld point distribution pattern, completely ignoring the uneven stress distribution characteristic of channel steel after welding. Under actual working conditions, the tensile, compressive, and shear stresses borne by the weld center area are much higher than those in the edge areas. Especially under dynamic loads and alternating stress scenarios, the weld center is highly prone to stress concentration due to the high stress concentration, which affects the stability and service life of the welded structure.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A hot-rolled channel steel butt welding equipment includes an operating table.

[0006] The welding station of the operating table is equipped with an adjusting roller and a turntable that are rotatably installed. The adjusting roller is provided with a combination groove, which includes a displacement groove and a welding groove. The welding groove is located below the displacement groove. The two ends of the displacement groove and the welding groove are connected to a lower displacement groove. The combination groove is engaged with a synchronous frame. The synchronous frame is horizontally slidably equipped with a sliding plate. The sliding plate is vertically slidably equipped with a spot welding gun on its side wall. A positioning gear is installed at the rotation center of the turntable. The positioning gear meshes with a half gear installed at the rotation center of the adjusting roller. The central angle corresponding to the half gear corresponds to the central angle of the shifting groove. A vortex-shaped guide rail is installed at the bottom of the turntable. The gap between the vortex-shaped guide rails is smaller closer to the center. The vortex-shaped guide rail is slidably connected to the slide plate. The vortex-shaped guide rail is used to control the variable pitch spot welding of the spot welding gun. The spot welding density is greater closer to the center of the channel steel.

[0007] In a preferred embodiment of the present invention, the bottom of the operating table is equipped with four support legs, and reinforcing ribs are installed between the four adjacent support legs. The heights of the adjacent reinforcing ribs are different to reduce stress concentration.

[0008] In a preferred embodiment of the present invention, a controller is installed on the operating table, and an argon arc welding robotic arm is installed on the side wall of the operating table. The argon arc welding robotic arm is used to completely weld the channel steel after spot welding contact. An inner groove is opened at the center of the operating table, and a hydraulic push rod is installed on the outer shell of the inner groove. A top plate is installed at the output end of the hydraulic push rod, and the top plate is pressed against the bottom of the channel steel welding position. The hydraulic push rod and the argon arc welding robotic arm are electrically connected to the controller.

[0009] In a preferred embodiment of the present invention, the operating table is equipped with bases at both ends, and a limiting groove is formed inside the base. A lead screw is rotatably mounted on the limiting groove, and a knob is installed at one end of the lead screw. Two lead screw threads with opposite directions are formed on the lead screw, and a clamp is provided corresponding to the lead screw threads. The clamp is slidably connected to the limiting groove.

[0010] In a preferred embodiment of the present invention, four positioning rods are installed on the top of the operating table, and positioning frames are installed on the top of the four positioning rods. A drive motor is installed at the bottom of the positioning frame, and a transmission shaft is installed at the output end of the drive motor. The end of the transmission shaft is connected to the rotation center of the adjusting roller. The drive motor is electrically connected to the controller. A damping bearing is embedded in the center of the positioning frame, and a positioning shaft is engaged with the inner wall of the damping bearing. The positioning shaft is connected to the rotation center of the turntable.

[0011] In a preferred embodiment of the present invention, a limiting rod is vertically installed at the bottom of the positioning frame, the limiting rod is movably connected to the synchronization frame, a limiting plate is installed at the bottom of the limiting rod, the diameter of the limiting plate is larger than the diameter of the limiting rod, and the limiting plate prevents the limiting rod and the synchronization frame from separating, a limiting spring is sleeved on the limiting rod, one end of the limiting spring is snapped onto the bottom of the positioning frame, and the other end of the limiting spring is snapped onto the synchronization frame, a slider is installed at the center of the synchronization frame, and the slider is slidably connected to the combination groove.

[0012] In a preferred embodiment of the present invention, a vertical groove is provided at the center of the slide plate, a positioning block is slidably disposed in the groove, a slide rod is installed through the positioning block, the end of the slide rod is connected to the side wall of the timing frame, a slide rod is installed at the end of the groove, the slide rod is movably connected to the positioning block, a return spring is sleeved on the slide rod, one end of the return spring is engaged with the side wall of the positioning block, the other end of the return spring is engaged with the side wall of the groove, a fixing frame is installed on the side wall of the positioning block, and the fixing frame is connected to the spot welding gun.

[0013] In a preferred embodiment of the present invention, the number of teeth of the half gear is the same as the number of teeth of the positioning gear. When the half gear meshes with the positioning gear, the control turntable rotates to drive the spot welding gun to slide to the next station. When the half gear separates from the positioning gear, the spot welding gun slides downward under the action of the lower moving groove and slides to the welding position to perform the welding operation.

[0014] In a preferred embodiment of the present invention, both ends of the vortex-shaped guide rail are connected to limit blocks. The cross-sectional area of ​​the limit blocks is larger than that of the vortex-shaped guide rail, and the limit blocks are used to prevent the slide plate from separating from the vortex-shaped guide rail.

[0015] As a preferred embodiment of the present invention, the hot-rolled channel steel butt welding process comprises the following steps: Step 1: Place the two channel steels to be welded on the bases at both ends of the operating table, rotate the knob to drive the lead screw shaft to rotate, so that the clamping plates move towards each other along the limiting groove, clamping the two ends of the channel steel and ensuring that the welding end faces fit tightly. Step 2: Start the drive motor through the controller. The drive motor drives the adjusting roller to rotate through the transmission shaft, which moves the slider on the synchronous frame along the combination groove. This moves the spot welding gun down to the welding station for spot welding. As the adjusting roller continues to rotate, the half gear meshes with the positioning gear, driving the turntable to rotate. The vortex linear guide rail drives the spot welding gun to slide horizontally to the next station. Repeat the welding-shifting process to achieve adaptive densified spot welding. Step 3: After spot welding is completed, the controller starts the argon arc welding robotic arm to perform full weld welding along the spot welding trajectory; Step 4: After welding is completed, the controller controls the hydraulic push rod to retract the top plate, and the lead screw shaft rotates in the opposite direction to loosen the clamping plate and disassemble the welded product.

[0016] Compared with the prior art, the present invention has the following advantages: This invention achieves stable downward movement of the spot welding gun along a precise trajectory to the welding station through the precise coordination of the combined grooves of the adjusting rollers. This effectively avoids problems such as weld point misalignment and missed welds caused by positioning deviations, significantly improving spot welding efficiency and welding quality. Simultaneously, based on the innovative design of gear meshing transmission and vortex-shaped linear guide rails, after completing one spot weld, the welding gun can be precisely driven to switch to the next station in an orderly manner, ensuring seamless, continuous, and efficient spot welding processes and significantly shortening the welding cycle. Furthermore, the equipment's unique adaptive densification spot welding function can automatically adjust the spot welding spacing in the high-stress area at the center of the weld according to the stress distribution characteristics of the channel steel, increasing the weld point density and specifically optimizing the mechanical properties of the welded structure. This effectively improves the fatigue resistance and load-bearing strength of the welded joint, fully meeting the needs of high-intensity engineering applications.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] In the attached diagram: Figure 1 A 3D diagram of a hot-rolled channel steel butt welding equipment; Figure 2 This is a front view of a hot-rolled channel steel butt welding equipment; Figure 3 A partial view of a hot-rolled channel steel butt welding equipment Figure 1 ; Figure 4 A three-dimensional diagram of the base of a hot-rolled channel steel butt welding equipment; Figure 5 A side view of a hot-rolled channel steel butt welding equipment; Figure 6 A partial view of a hot-rolled channel steel butt welding equipment Figure 2 ; Figure 7 A partial view of a hot-rolled channel steel butt welding equipment Figure 3 ; Figure 8 A partial view of a hot-rolled channel steel butt welding equipment Figure 4 ; Figure 9 A partial view of a hot-rolled channel steel butt welding equipment Figure 5 ; Figure 10 A bottom view of the turntable of a hot-rolled channel steel butt welding equipment; Figure 11 A butt welding equipment for hot-rolled channel steel Figure 10 Enlarged view of point A in the middle; Figure 12 This is a plan view of a single vortex-shaped guide rail for a hot-rolled channel steel butt welding equipment.

[0019] In the picture: 1. Operating platform; 11. Support leg; 111. Reinforcing rib; 12. Controller; 13. Argon arc welding robotic arm; 14. Positioning frame; 141. Positioning rod; 15. Base; 151. Clamping plate; 152. Limiting groove; 153. Lead screw shaft; 154. Knob; 16. Hydraulic push rod; 161. Inner groove; 162. Top plate; 2. Adjusting roller; 21. Drive motor; 211. Transmission shaft; 22. Combination groove; 221. Shifting groove; 222. Lowering groove; 223. Welding groove; 23. Synchronizing frame; 231. Slider; 232. Limiting rod; 233. Limiting plate; 234. Limiting spring; 24. Slide plate; 241. Slide groove; 242. Slide rod; 243. Positioning block; 244. Return spring; 25. Spot welding gun; 251. Fixing frame; 3. Turntable; 31. Positioning shaft; 32. Positioning gear; 321. Half gear; 33. Scroll-shaped guide rail; 331. Limiting block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0021] Example 1:

[0022] like Figures 1 to 12 As shown, a hot-rolled channel steel butt welding equipment includes an operating table 1.

[0023] An adjusting roller 2 and a turntable 3 are rotatably installed on the welding station of the operating table 1; The adjusting roller 2 is provided with a combination groove 22, which includes a shift groove 221 and a welding groove 223. The welding groove 223 is located below the shift groove 221. The shift groove 221 and the welding groove 223 are connected to the lower shift groove 222 at both ends. The combination groove 22 is engaged with a timing frame 23. The timing frame 23 is horizontally slidably provided with a sliding plate 24. The side wall of the sliding plate 24 is vertically slidably provided with a spot welding gun 25. A positioning gear 32 is installed at the rotation center of the turntable 3. The positioning gear 32 meshes with the half gear 321 installed at the rotation center of the adjusting roller 2. The central angle corresponding to the half gear 321 corresponds to the central angle of the shifting groove 221. A vortex-shaped guide rail 33 is installed at the bottom of the turntable 3. The gap between the vortex-shaped guide rails 33 is smaller as they are closer to the center. The vortex-shaped guide rail 33 is slidably connected to the slide plate 24. The vortex-shaped guide rail 33 is used to control the variable pitch spot welding of the spot welding gun 25. The spot welding density is greater as it is closer to the center of the channel steel.

[0024] Through the meshing design of the combined slot 22 and the synchronous frame 23, and in conjunction with the linkage of the turntable 3 and the vortex linear guide rail 33, the spot welding gun 25 can achieve precise displacement and variable density spot welding. It can increase the weld density in the stress concentration area according to the stress characteristics of the channel steel, effectively improving the fatigue resistance and load-bearing capacity of the welded joint.

[0025] like Figures 1 to 12 As shown in the specific embodiment, the bottom of the operating platform 1 is equipped with four support legs 11, and reinforcing ribs 111 are installed between the four adjacent support legs 11, with different heights between adjacent reinforcing ribs 111. The structural design of the support legs 11 and reinforcing ribs 111 can enhance the stability of the operating platform 1. The reinforcing ribs 111 of different heights can disperse the stress during equipment operation, avoid excessive local stress causing deformation of the operating platform, and extend the service life of the equipment.

[0026] like Figures 1 to 12As shown, furthermore, a controller 12 is installed on the operating table 1, and an argon arc welding robotic arm 13 is installed on the side wall of the operating table 1. The argon arc welding robotic arm 13 is used to completely weld the channel steel after spot welding contact. An inner groove 161 is opened at the center of the operating table 1, and a hydraulic push rod 16 is installed on the outer shell of the inner groove 161. A top plate 162 is installed at the output end of the hydraulic push rod 16. The top plate 162 is pressed against the bottom of the channel steel welding position. The hydraulic push rod 16 and the argon arc welding robotic arm 13 are electrically connected to the controller 12. The controller 12 can precisely control the movement of the hydraulic push rod 16 and the argon arc welding robotic arm 13. The top plate 162 can provide bottom support for the channel steel during welding to prevent welding deformation. The argon arc welding robotic arm 13 can realize automated welding of the entire weld seam, improving welding efficiency and accuracy.

[0027] like Figures 1 to 12 As shown, furthermore, bases 15 are installed at both ends of the operating table 1. Limiting grooves 152 are formed inside the bases 15, and lead screw shafts 153 are rotatably mounted on the limiting grooves 152. A knob 154 is installed at one end of the lead screw shaft 153. Two screw threads with opposite directions are formed on the lead screw shaft 153, and clamping plates 151 are correspondingly engaged with these threads. The clamping plates 151 are slidably connected to the limiting grooves 152. By rotating the knob 154 to drive the lead screw shaft 153 to rotate, the clamping plates 151 can move in opposite directions along the limiting grooves 152, achieving rapid clamping and positioning of both ends of the channel steel. This ensures a tight fit between the welding end faces, providing a stable foundation for subsequent welding and preventing a decrease in welding quality due to channel steel displacement.

[0028] Example 2:

[0029] The difference between the above embodiments and this embodiment is that: Figures 1 to 12 As shown, four positioning rods 141 are mounted on the top of the operating table 1. A positioning frame 14 is mounted on the top of the four positioning rods 141. A drive motor 21 is mounted on the bottom of the positioning frame 14. A transmission shaft 211 is mounted on the output end of the drive motor 21. The end of the transmission shaft 211 is connected to the rotation center of the adjusting roller 2. The drive motor 21 is electrically connected to the controller 12. A damping bearing is embedded in the center of the positioning frame 14, and a positioning shaft 31 is engaged with the inner wall of the damping bearing. The positioning shaft 31 is connected to the rotation center of the turntable 3. The drive motor 21 drives the adjusting roller 2 to rotate through the transmission shaft 211, which realizes the automated drive of the spot welding gun 25. With the design of the positioning frame 14 and the damping bearing, the stability of the rotation of the adjusting roller 2 and the turntable 3 can be guaranteed, making the spot welding process more precise and efficient.

[0030] like Figures 1 to 12As shown, in a specific embodiment, a limiting rod 232 is vertically installed at the bottom of the positioning frame 14. The limiting rod 232 is movably connected to the synchronization frame 23. A limiting plate 233 is installed at the bottom of the limiting rod 232. The diameter of the limiting plate 233 is larger than that of the limiting rod 232, and the limiting plate 233 prevents the limiting rod 232 from separating from the synchronization frame 23. A limiting spring 234 is sleeved on the limiting rod 232. One end of the limiting spring 234 is snapped onto the bottom of the positioning frame 14, and the other end is snapped onto the synchronization frame 23. A slider 231 is installed at the center of the synchronization frame 23, and the slider 231 is slidably connected to the combination groove 22. The setting of the limiting rod 232 and the limiting spring 234 can limit and reset the movement of the synchronization frame 23, ensuring that the synchronization frame 23 is accurately positioned when sliding on the combination groove 22, avoiding displacement deviation of the spot welding gun 25 due to shaking, and ensuring the accuracy of the spot welding position.

[0031] like Figures 1 to 12 As shown, further, a vertical groove 241 is vertically provided at the center of the slide plate 24, and a positioning block 243 is vertically slidably provided in the groove 241. A slide rod 242 is installed through the positioning block 243, and the end of the slide rod 242 is connected to the side wall of the synchronous frame 23. The slide rod 242 is installed at the end of the groove 241, and the slide rod 242 is movably connected to the positioning block 243. A return spring 244 is sleeved on the slide rod 242. One end of the return spring 244 is engaged with the side wall of the positioning block 243, and the other end of the return spring 244 is engaged with the side wall of the groove 241. A fixing frame 251 is installed on the side wall of the positioning block 243, and the fixing frame 251 is connected to the spot welding gun 25. The structure of the slide 241, positioning block 243 and return spring 244 allows the spot welding gun 25 to slide and return flexibly in the vertical direction. In conjunction with the movement of the synchronous frame 23, it can accurately control the spot welding gun 25 to move down to the welding station or up to the shifting station, ensuring the continuity and reliability of the spot welding process.

[0032] Example 3:

[0033] The difference between the above embodiments and this embodiment is that: Figures 1 to 12 As shown, the number of teeth on the half gear 321 is the same as the number of teeth on the positioning gear 32. When the half gear 321 meshes with the positioning gear 32, the control turntable 3 rotates, causing the spot welding gun 25 to slide to the next station. When the half gear 321 separates from the positioning gear 32, the spot welding gun 25 slides downward under the action of the lower moving groove 222, sliding to the welding position for welding operation. The matching design of the number of teeth on the half gear 321 and the positioning gear 32 allows for precise linkage between the rotation of the turntable 3 and the rotation of the adjusting roller 2, realizing the orderly switching of the spot welding gun 25's movement and welding action, ensuring the automation and precision of the welding process, and improving welding efficiency.

[0034] like Figures 1 to 12As shown, in a specific embodiment, both ends of the vortex-shaped guide rail 33 are connected to limit blocks 331. The cross-sectional area of ​​the limit blocks 331 is larger than that of the vortex-shaped guide rail 33. The limit blocks 331 can limit the sliding range of the slide plate 24 on the vortex-shaped guide rail 33, prevent the slide plate 24 from sliding off the guide rail, ensure the stability and safety of the spot welding gun 25 during horizontal movement, and prevent equipment failure or welding errors caused by the slide plate falling off.

[0035] This invention also discloses a butt welding process for hot-rolled channel steel, the steps of which are as follows: Step 1: Place the two channel steels to be welded on the base 15 at both ends of the operating table 1, rotate the knob 154 to drive the lead screw shaft 153 to rotate, so that the clamping plate 151 moves towards each other along the limiting groove 152, clamping the two ends of the channel steel and ensuring that the welding end faces are tightly fitted. Step 2: Start the drive motor 21 through the controller 12. The drive motor 21 drives the adjusting roller 2 to rotate through the transmission shaft 211, so that the slider 231 on the synchronous frame 23 moves along the combination groove 22, and drives the spot welding gun 25 to move down to the welding station for spot welding. As the adjusting roller 2 continues to rotate, the half gear 321 meshes with the positioning gear 32, driving the turntable 3 to rotate. The vortex linear guide rail 33 drives the spot welding gun 25 to slide horizontally to the next station, repeating the welding-shifting process to achieve adaptive densified spot welding. Step 3: After spot welding is completed, controller 12 starts argon arc welding robotic arm 13 to perform full weld welding along the spot welding trajectory; Step 4: After welding is completed, controller 12 controls hydraulic push rod 16 to retract top plate 162, and lead screw shaft 153 rotates in the opposite direction to loosen clamping plate 151, thus disassembling the welded product.

[0036] The implementation principle of the hot-rolled channel steel butt welding equipment of the present invention is as follows: First, the operator places the two channel steels to be welded on the corresponding base 15, ensuring the welding ends of the two channel steels are tightly fitted together. Rotating the knob 154 drives the lead screw shaft 153 to rotate. Since the lead screw shaft 153 has two threads with opposite directions of rotation, the clamping plate 151, which meshes with it, moves in opposite directions along the limiting groove 152, thereby clamping both ends of the channel steel and ensuring a tight fit between the welding ends. Next, the hydraulic push rod 16 drives the top plate 162 to rise, pressing it against the bottom of the channel steel welding position to provide support and prevent deformation of the channel steel during welding. Through the dual fixing method of the clamping plate 151 and the top plate 162, the positioning and support of the channel steel are accurately and reliably completed, effectively avoiding welding quality problems caused by changes in the channel steel's position or deformation during welding, laying a stable foundation for subsequent welding operations.

[0037] After the above positioning operation is completed, the operator starts the drive motor 21. The drive motor 21 drives the bottom adjusting roller 2 to rotate through the transmission shaft 211. Figure 8 As shown, when the adjusting roller 2 rotates clockwise, the half gear 321 and the positioning gear 32 will not rotate, and thus the welding position will not change. However, the position of the slider 231 on the timing frame 23 on the combination groove 22 will change.

[0038] When the adjusting roller 2 rotates, the slider 231, guided by the lower shift groove 222, can slide from the shift groove 221 to the welding groove 223. During this process, the entire synchronous frame 23 slides vertically downwards. The synchronous frame 23 moves downwards along the slide rod 231, which can stretch the limit spring 234. The limit spring 234 facilitates the subsequent reset operation.

[0039] When the synchronous frame 23 moves down, the synchronous frame 23 drives the positioning block 234 to move vertically downward on the slide plate 24 via the slide rod 242. The positioning frame 234 then drives the spot welding gun 25 on the side wall fixing frame 251 to move down and then to the welding station, thereby completing the spot welding operation.

[0040] As the adjusting roller 2 continues to rotate, the synchronous frame 23 can move from the welding groove 223 to the shift groove 221 under the guidance of another downward shift groove 222. At this time, the spot welding gun 25 moves upward again, and as it continues to rotate, the spot welding gun 25 slides in the shift groove 221. At this time, the height of the spot welding gun 25 will not change.

[0041] However, at this time, the half gear 321 re-meshes with the positioning gear 32 of the turntable 3, and the positioning gear 32 rotates synchronously. The positioning gear 32 drives the turntable 3 to rotate, and the vortex-shaped guide rail 33 at the bottom of the turntable 3 begins to rotate synchronously. The vortex-shaped guide rail 33 drives the spot welding gun 25 to slide horizontally to the next station.

[0042] As the adjusting roller 2 rotates continuously, the spot welding gun 25 can eventually form a repeating process of welding and displacement. Because the gap between the vortex guide rails decreases closer to the center, the horizontal displacement of the slide plate 24 along the guide rails changes with the rotation angle of the turntable, thus controlling the lateral movement trajectory of the spot welding gun 25. This causes the spot welding spacing of the spot welding gun 25 on the channel steel welding line to gradually decrease (the closer to the center of the channel steel, the greater the spot welding density), achieving adaptive dense spot welding. This variable density spot welding method can increase the weld density in the stress concentration area at the center of the weld, significantly improving the fatigue resistance and load-bearing capacity of the welded joint, based on the stress characteristics of the channel steel. The adaptive dense spot welding function adjusts the weld density specifically according to the actual stress conditions of the channel steel, optimizes the welding structure, effectively improves the performance of the welded joint, enhances the welding quality, and makes the welded channel steel more suitable for engineering applications, improving the practicality and professionalism of the equipment.

[0043] After spot welding is completed, the controller 12 starts the argon arc welding robot arm 13 to perform full weld welding along the spot welding trajectory. After welding is completed, the hydraulic push rod 16 retracts the top plate 162, and the clamping plate 151 is released by rotating the lead screw shaft 153 in the opposite direction, so that the finished product can be disassembled.

Claims

1. A hot-rolled channel steel butt welding equipment, comprising an operating table (1), characterized in that: The welding station of the operating table (1) is equipped with an adjusting roller (2) and a turntable (3). The adjusting roller (2) is provided with a combination groove (22), which includes a displacement groove (221) and a welding groove (223). The welding groove (223) is located below the displacement groove (221). The displacement groove (221) and the welding groove (223) are connected to the lower displacement groove (222) at both ends. The combination groove (22) is engaged with a synchronous frame (23). The synchronous frame (23) is horizontally slidably provided with a sliding plate (24). The sliding plate (24) is vertically slidably provided with a spot welding gun (25) on its side wall. The turntable (3) is equipped with a positioning gear (32) at its rotation center. The positioning gear (32) meshes with the half gear (321) installed at the rotation center of the adjusting roller (2). The central angle of the half gear (321) corresponds to the central angle of the shift groove (221). The bottom of the turntable (3) is equipped with a vortex-shaped guide rail (33). The gap between the vortex-shaped guide rails (33) closer to the center is smaller. The vortex-shaped guide rail (33) is slidably connected to the slide plate (24). The vortex-shaped guide rail (33) is used to control the spot welding gun (25) to perform variable pitch spot welding. The spot welding density is greater closer to the center of the channel steel.

2. The hot-rolled channel steel butt welding equipment according to claim 1, characterized in that, The bottom of the operating table (1) is equipped with four support legs (11), and there are reinforcing ribs (111) between the four adjacent support legs (11). The heights of the adjacent reinforcing ribs (111) are different, which is used to reduce stress concentration.

3. The hot-rolled channel steel butt welding equipment according to claim 1, characterized in that, The operating table (1) is equipped with a controller (12), and the side wall of the operating table (1) is equipped with an argon arc welding robot arm (13). The argon arc welding robot arm (13) is used to completely weld the channel steel after spot welding contact. The operating table (1) has an inner groove (161) at the center position. The inner groove (161) is equipped with a hydraulic push rod (16). The output end of the hydraulic push rod (16) is equipped with a top plate (162). The top plate (162) is pressed against the bottom of the channel steel welding position. The hydraulic push rod (16) and the argon arc welding robot arm (13) are electrically connected to the controller (12).

4. The hot-rolled channel steel butt welding equipment according to claim 1, characterized in that, The operating table (1) has bases (15) installed at both ends. A limiting groove (152) is opened inside the base (15). A lead screw shaft (153) is rotatably installed on the limiting groove (152). A knob (154) is installed at one end of the lead screw shaft (153). Two screw threads with opposite directions are opened on the lead screw shaft (153), and a clamp (151) is set to mesh with the corresponding screw threads. The clamp (151) is slidably connected to the limiting groove (152).

5. The hot-rolled channel steel butt welding equipment according to claim 3, characterized in that, The top of the operating table (1) is equipped with four positioning rods (141), and the top of the four positioning rods (141) is equipped with a positioning frame (14). The bottom of the positioning frame (14) is equipped with a drive motor (21), and the output end of the drive motor (21) is equipped with a transmission shaft (211). The end of the transmission shaft (211) is connected to the rotation center of the adjusting roller (2). The drive motor (21) is electrically connected to the controller (12). The center of the positioning frame (14) is embedded with a damping bearing, and the inner wall of the damping bearing is fitted with a positioning shaft (31). The positioning shaft (31) is connected to the rotation center of the turntable (3).

6. The hot-rolled channel steel butt welding equipment according to claim 5, characterized in that, The positioning frame (14) has a vertically installed limit rod (232) at the bottom. The limit rod (232) is movably connected to the synchronization frame (23). The bottom of the limit rod (232) has a limit plate (233) installed. The diameter of the limit plate (233) is larger than that of the limit rod (232), and the limit plate (233) prevents the limit rod (232) and the synchronization frame (23) from separating. A limit spring (234) is sleeved on the limit rod (232). One end of the limit spring (234) is snapped onto the bottom of the positioning frame (14), and the other end of the limit spring (234) is snapped onto the synchronization frame (23). A slider (231) is installed at the center of the synchronization frame (23), and the slider (231) is slidably connected to the combination groove (22).

7. The hot-rolled channel steel butt welding equipment according to claim 1, characterized in that, The sliding plate (24) has a vertically opened groove (241) at its center. A positioning block (243) is vertically slidably arranged in the groove (241). A sliding rod (242) is installed through the positioning block (243). The end of the sliding rod (242) is connected to the side wall of the synchronous frame (23). The sliding rod (242) is installed at the end of the groove (241). The sliding rod (242) is movably connected to the positioning block (243). A return spring (244) is sleeved on the sliding rod (242). One end of the return spring (244) is engaged with the side wall of the positioning block (243), and the other end of the return spring (244) is engaged with the side wall of the groove (241). A fixing frame (251) is installed on the side wall of the positioning block (243), and the fixing frame (251) is connected to the spot welding gun (25).

8. The hot-rolled channel steel butt welding equipment according to claim 1, characterized in that, The number of teeth of the half gear (321) is the same as the number of teeth of the positioning gear (32). When the half gear (321) meshes with the positioning gear (32), the control turntable (3) rotates to drive the spot welding gun (25) to slide to the next station. When the half gear (321) separates from the positioning gear (32), the spot welding gun (25) slides down under the action of the lower moving groove (222) and slides to the welding position to perform the welding operation.

9. The hot-rolled channel steel butt welding equipment according to claim 1, characterized in that, Both ends of the spiral guide rail (33) are connected to limit blocks (331). The cross-sectional area of ​​the limit block (331) is larger than that of the spiral guide rail (33), and the limit block (331) is used to prevent the slide plate (24) from separating from the spiral guide rail (33).

10. A butt welding process for hot-rolled channel steel, characterized in that, The hot-rolled channel steel butt welding equipment according to any one of claims 1 to 9, wherein the hot-rolled channel steel butt welding process comprises the following steps: Step 1: Place the two channel steels to be welded on the base (15) at both ends of the operating table (1), rotate the knob (154) to drive the lead screw shaft (153) to rotate, so that the clamping plate (151) moves towards each other along the limiting groove (152) to clamp the two ends of the channel steel and ensure that the welding end faces are tightly fitted. Step 2: Start the drive motor (21) through the controller (12). The drive motor (21) drives the adjusting roller (2) to rotate through the transmission shaft (211), so that the slider (231) on the synchronous frame (23) moves along the combination groove (22), and drives the spot welding gun (25) to move down to the welding station for spot welding. As the adjusting roller (2) continues to rotate, the half gear (321) meshes with the positioning gear (32), drives the turntable (3) to rotate, and the vortex linear guide rail (33) drives the spot welding gun (25) to slide horizontally to the next station, repeating the welding-shifting process to achieve adaptive densified spot welding. Step 3: After spot welding is completed, the controller (12) starts the argon arc welding robot arm (13) to perform full weld welding along the spot welding trajectory; Step 4: After welding is completed, the controller (12) controls the hydraulic push rod (16) to retract the top plate (162), and the lead screw shaft (153) rotates in the opposite direction to loosen the clamping plate (151) and disassemble the welded product.

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