A method for processing a variable cross-section h-beam

Abstract

The application discloses a processing method for variable cross-section H-shaped steel, which comprises the following steps: a, determining the welding route coordinate system of the web plate and the two side plates; b, assembling the variable cross-section H-shaped steel through a lifting mechanism, a left overturning mechanism and a right overturning mechanism; c, aligning the web plate start end and the two side plate start ends of the variable cross-section H-shaped steel through an alignment mechanism; d, performing spot welding treatment on the variable cross-section H-shaped steel along the set welding route through a welding gun mechanism; e, welding the variable cross-section H-shaped steel through a welding machine; f, conveying the variable cross-section H-shaped steel to the left correction mechanism through a conveying line B for correction, and conveying the single-side corrected variable cross-section H-shaped steel to a conveying line C; g, returning the single-side corrected variable cross-section H-shaped steel to the conveying line B through the conveying line C, conveying the variable cross-section H-shaped steel to the right correction mechanism through the conveying line B for correction, and through the above setting, the variable cross-section H-shaped steel can be assembled, spot welded, welded and corrected, and the variable cross-section H-shaped steel on different functional workstations can be automatically transferred, so that the automatic processing of the variable cross-section H-shaped steel is realized.

Description

Technical Field

[0001] This invention relates to the technical field of steel component processing, and in particular to a processing method for variable cross-section H-beams. Background Technology

[0002] H-beams, as a type of steel structural member, can be used as load-bearing supports for industrial structures, steel piles and support structures for underground engineering, and beams and columns in industrial and civil structures. H-beams are an economical type of steel profile widely used in industry, construction, bridges, and oil drilling platforms. H-beams include constant-section H-beams and variable-section H-beams. A constant-section H-beam refers to one where the flanges on both sides of the web are parallel, while a variable-section H-beam refers to one where the flanges on both sides of the web are angled together.

[0003] Since the web structure and flange inclination angle of variable cross-section H-beams and constant cross-section H-beams are different, and the existing processing methods for constant cross-section H-beams cannot be applied to variable cross-section H-beams, and the current level of automation in H-beam processing is low, requiring worker coordination and transportation, which is not only inefficient but also unsafe, it is necessary to invent a processing method that is suitable for variable cross-section H-beams and can achieve automated production. Summary of the Invention

[0004] The purpose of this invention is to provide a processing method for variable cross-section H-beams, which can realize multiple processes such as assembly, spot welding, welding and straightening of variable cross-section H-beams, as well as automatic transfer of variable cross-section H-beams at different functional stations, thereby realizing automated processing of variable cross-section H-beams.

[0005] The above-mentioned technical objective of this invention is achieved through the following technical solution: a processing method for variable cross-section H-beams, comprising...

[0006] a: Measure the dimensions of the web and the two side flanges, input the measured dimensional data into the control terminal, and the control terminal analyzes the data and determines the coordinate system of the variable cross-section H-beam prototype and the coordinate system of the variable cross-section H-beam prototype welding.

[0007] b: Based on the determined coordinate system of the variable cross-section H-beam prototype, the lifting mechanism of the assembly device lifts the web plate to the set height. Multiple sets of left-flipping mechanisms clamp the left wing plate and drive the left wing plate to flip towards the web plate. Multiple sets of right-flipping mechanisms clamp the right wing plate and drive the right wing plate to flip towards the web plate. Taking the left wing plate as the reference end, the distance that each set of right-flipping mechanisms moves laterally towards the web plate is determined according to the determined coordinate system of the variable cross-section H-beam prototype, so as to complete the pre-assembly and assembly of the variable cross-section H-beam.

[0008] c: Align the beginning of the web and the beginning of the two flanges of the variable cross-section H-beam using an alignment mechanism;

[0009] d: According to the determined variable cross-section H-shaped steel blank coordinate system, the point welding device adjusts the inclination angle of the clamping surface of the moving roller group, so that the left side plate is attached to the clamping surface of the fixed roller group, and the right side plate is attached to the clamping surface of the moving roller group. The welding gun mechanism performs spot welding along the welding route coordinate system. The moving roller group adjusts the distance of transverse movement to the side of the fixed roller group in real time according to the welding route coordinate system;

[0010] e: After the variable cross-section H-shaped steel is completed, the first transfer device is used to transfer the variable cross-section H-shaped steel to the welding workbench, and the first positioning device is used to position the left side of the first end of the variable cross-section H-shaped steel. The welding machine welds the left side of the variable cross-section H-shaped steel according to the welding route coordinate system. Then, the first positioning device positions the right side of the variable cross-section H-shaped steel, and the welding machine welds the right side of the first end of the variable cross-section H-shaped steel. After the first end of the variable cross-section H-shaped steel is completed, the turnover mechanism is used to turn over the variable cross-section H-shaped steel so that the second end of the variable cross-section H-shaped steel is set upward. Then, the first positioning device positions the left and right sides of the variable cross-section H-shaped steel in turn, and the welding machine welds the left and right sides of the second end of the variable cross-section H-shaped steel;

[0011] f: After the variable cross-section H-shaped steel is completed, the second transfer device is used to transfer the variable cross-section H-shaped steel to the conveying line B. The left second positioning device is used to position the variable cross-section H-shaped steel, so that the first side of the variable cross-section H-shaped steel is attached to the left reference component B. The conveying line B is used to convey the variable cross-section H-shaped steel to the correction mechanism. The correction mechanism corrects the first side of the variable cross-section H-shaped steel, and then conveys the variable cross-section H-shaped steel to the conveying line C;

[0012] g: The variable cross-section H-shaped steel is returned to the conveying line B through the conveying line C. The right second positioning device is used to position the variable cross-section H-shaped steel, so that the second side of the variable cross-section H-shaped steel is attached to the right reference component B. The conveying line B is used to convey the variable cross-section H-shaped steel to the correction mechanism. The correction mechanism corrects the second side of the variable cross-section H-shaped steel, and then conveys the variable cross-section H-shaped steel to the conveying line C after the two sides are corrected;

[0013] h: When processing the same batch of variable cross-section H-shaped steel, steps b to g can be repeated. When processing another batch of variable cross-section H-shaped steel, steps a to g need to be repeated.

[0014] Further, between the assembling device and the spot welding device, there are web stop members, two wing plate stop members, a web position sensor a and two groups of wing plate position sensors a. The position of the web stop member is closer to the spot welding device than that of the wing plate stop member. The web and the wing plate are conveyed by the conveying line A and stopped by the corresponding stop members. When the web position sensor a detects the web, and the two wing plate position sensors a detect the corresponding wing plates, the conveying line A stops conveying. At this time, the assembling device is used for assembling work.

[0015] Further, the alignment mechanism comprises a left telescopic stopper, a right telescopic stopper, a web plate position sensor b and two sets of wing plate position sensors b. When the variable cross-section H-shaped steel is conveyed, the left telescopic stopper stops the left wing plate and the web plate of the variable cross-section H-shaped steel, and the right telescopic stopper stops the right wing plate and the web plate of the variable cross-section H-shaped steel, so as to complete the alignment of the first end of the variable cross-section H-shaped steel. When the web plate position sensor b detects that the web plate is in place, and the two sets of wing plate position sensors b both detect that the corresponding wing plate is in place, the left telescopic stopper and the right telescopic stopper are retracted to release the stop and limit of the variable cross-section H-shaped steel.

[0016] Further, a plurality of mounting racks are arranged longitudinally between adjacent rollers of the conveying line A. Each mounting rack is provided with a set of left and right turnover mechanisms. Each mounting rack is provided with a first driving unit for driving the right turnover mechanism to move transversely relative to the left turnover mechanism. The distance of the corresponding right turnover mechanism driven by each first driving unit is determined according to the variable cross-section H-shaped steel profile coordinate system, so that the right wing plate and the web plate bevel of the right turnover mechanism are closely fitted.

[0017] Further, the rack of the spot welding device is provided with a fixed frame, a moving frame, a support frame, a first servo cylinder and a second servo cylinder. The fixed roller group is fixedly installed on the left side of the rack through the fixed frame. The moving frame is transversely movably arranged on the right side of the rack. The support frame is rotatably installed on the moving frame through a pivot a. The moving roller group is arranged on the support frame. The first servo cylinder and the second servo cylinder are fixedly installed on the two sides of the pivot a of the rack. The first servo cylinder and the second servo cylinder are used to adjust the inclination angle of the clamping end of the moving roller group and the transverse movement distance of the moving roller group at the same time.

[0018] Further, the first transfer station is arranged between the spot welding device and the welding device. The first transfer station comprises a conveying line D and a conveying line E arranged transversely apart from the conveying line D. The conveying line D is arranged at a position corresponding to the discharge port of the spot welding device. The first transfer device comprises a transfer device A. The transfer device A is used to transfer the variable cross-section H-shaped steel from the conveying line D to the conveying line E. The welding workbench is provided with a conveying line F and a conveying line G on the two sides respectively. The conveying line F is arranged on the extension line of the conveying line E, so that the variable cross-section H-shaped steel can be directly conveyed from the conveying line E to the conveying line F. The first transfer device further comprises a transfer device B. The transfer device B is used to transfer the variable cross-section H-shaped steel on the conveying line F to the welding workbench. After the welding of the variable cross-section H-shaped steel is completed, the transfer device B is used to transfer the variable cross-section H-shaped steel from the welding workbench to the conveying line G.

[0019] Further, the conveying line B is provided with a conveying line H arranged on the extension line of the conveying line G, so that the variable cross-section H-shaped steel can be directly conveyed from the conveying line G to the conveying line H. The second transfer device is used to transfer the variable cross-section H-shaped steel from the conveying line H to the conveying line B.

[0020] Further, the conveying line D, the conveying line F and the conveying line H are respectively provided with a first sensor at the beginning end, a second sensor at the middle region and a third sensor at the tail end, the conveying line E and the conveying line G are respectively provided with a second sensor and a third sensor, the conveying line B is provided with a second sensor and a fourth sensor at the tail end of the conveying line B, the first sensor is used for detecting whether the variable cross-section H-shaped steel starts to enter the conveying line, the second sensor is used for detecting and acquiring whether the variable cross-section H-shaped steel exists in the middle region of the conveying line, the third sensor is used for preventing the variable cross-section H-shaped steel from being conveyed too far, and the fourth sensor is used for detecting and acquiring the end position information of the variable cross-section H-shaped steel before entering the correcting device.

[0021] Further, the spot welding device comprises a fifth sensor arranged at the input end of the rack and a sixth sensor arranged at the output end of the rack, the fifth sensor is used for detecting whether the variable cross-section H-shaped steel starts to enter the rack, and the sixth sensor is used for detecting whether the variable cross-section H-shaped steel completely exits the rack of the spot welding device.

[0022] Further, the spot welding device rack is respectively provided with a welding gun mechanism on the left side and the right side, the welding gun mechanism comprises a welding gun, a lifting assembly for vertically lifting the welding gun and a servo driving mechanism for horizontally moving the welding gun.

[0023] In summary, the present application has the following beneficial effects:

[0024] 1. The web plate placed thereon is lifted to a set height by the lifting mechanism, and according to the data measured by the web plate based on the left side plate as the reference end, each group of right turning mechanisms can determine the corresponding transverse distance according to the set parameters, so that the right side plate clamped by the right turning mechanism is tightly attached to the second edge of the web plate, and the left side plate clamped by the left turning mechanism is tightly attached to the first edge of the web plate, thereby realizing the automatic assembly of the variable cross-section H-shaped steel;

[0025] 2. The clamping surface of the moving roller group is adjustably arranged to adapt to variable cross-section H-shaped steels with different inclination angles, and the moving roller group can adjust the transverse distance to the side of the fixed roller group in real time according to the welding route coordinate system, so as to ensure that the variable cross-section H-shaped steel can be stably clamped when the welding gun performs spot welding on the welding route of the variable cross-section H-shaped steel;

[0026] 3. The position of the variable cross-section H-shaped steel is positioned by the first positioning device on the left side, so that the first edge of the variable cross-section H-shaped steel is attached to the left reference component A of the welding workbench, the welding machine is used to weld the welding route on both sides of the first end of the variable cross-section H-shaped steel, the variable cross-section H-shaped steel is turned over by the turning mechanism, the position of the variable cross-section H-shaped steel is positioned by the first positioning device on the right side, so that the second edge of the variable cross-section H-shaped steel is attached to the right reference component A of the welding workbench, and the welding machine is used to weld the welding route on both sides of the second end of the variable cross-section H-shaped steel,

[0027] 3. The automatic welding can be realized by the cooperation of the first positioning device, the longitudinally movable welding machine and the turnover mechanism.

[0028] 4. The automatic correction of the left side edge of the variable cross-section H-shaped steel can be realized by the cooperation of the conveying line B, the left second positioning device, the correction device and the conveying line C; the automatic correction of the right side edge of the variable cross-section H-shaped steel can be realized by the cooperation of the conveying line B, the right second positioning device, the correction device and the conveying line C, thereby realizing the automatic correction of the two side edges of the variable cross-section H-shaped steel. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the arrangement structure schematic diagram of each station of the present application.

[0030] Figure 2 It is the arrangement schematic diagram of the assembling station, the first transfer station and the local welding station of the present application.

[0031] Figure 3 It is the arrangement schematic diagram of the local welding station, the second transfer station and the correction station of the present application.

[0032] Figure 4 It is the structure schematic diagram of the assembling device of the present application.

[0033] Figure 5 It is the structure schematic diagram of the assembling mechanism of the present application.

[0034] Figure 6 It is the installation structure schematic diagram of the left driving member and the right driving member of the present application.

[0035] Figure 7 It is the sectional view of the spot welding device of the present application.

[0036] Figure 8 It is the installation structure schematic diagram of the fifth sensor and the sixth sensor of the present application.

[0037] Figure 9 It is the position schematic diagram of the web position sensor b and the wing plate position sensor b of the present application.

[0038] Figure 10 It is the structure schematic diagram of the first servo electric cylinder and the second servo electric cylinder of the present application.

[0039] Figure 11 It is the installation structure schematic diagram of the alignment mechanism of the present application.

[0040] Figure 12 It is the structure schematic diagram of the fixed roller group and the movable roller group of the present application.

[0041] Figure 13Fig. 1 is a structural schematic diagram of the web position sensor a and the wing position sensor of the present application.

[0042] Figure 14 Fig. 2 is a structural schematic diagram of the position structure of the web stop and the wing stop of the present application.

[0043] Figure 15 Fig. 3 is a structural schematic diagram of the welding workbench of the present application.

[0044] Figure 16 Fig. 4 is a schematic diagram of the arrangement of the conveying line B and the correcting device of the present application.

[0045] Figure 17 Fig. 5 is a structural schematic diagram of the left second correcting device clamping small variable cross-section H-shaped steel of the present application.

[0046] Figure 18 Fig. 6 is a structural schematic diagram of the left second correcting device clamping medium variable cross-section H-shaped steel of the present application.

[0047] Figure 19 Fig. 7 is a structural schematic diagram of the right second correcting device clamping small variable cross-section H-shaped steel of the present application.

[0048] Figure 20 Fig. 8 is a partial structural schematic diagram of the welding gun mechanism of the present application.

[0049] In the diagram: 10. Assembly station; 11. Assembly device; 111. Mounting frame; 112. First drive unit; 12. Lifting mechanism; 13. Left tilting mechanism; 131. Fixed seat; 132. Left support seat; 1321. Second pivot; 133. Left support roller; 134. Left clamping wheel assembly; 135. Left tilting component; 136. Left drive component; 14. Right tilting mechanism; 141. Moving seat; 142. Right support seat; 1421. First pivot; 143. Right support roller; 144. Right clamping wheel assembly; 145. Right tilting component; 146. Right drive component; 147. Guide arc surface; 15. Conveyor line A; 151. Web plate stop component; 152. Wing plate stop component; 153. Web plate position sensor a; 154. Wing plate position sensor a; 16. Spot welding device; 161. Alignment mechanism; 1611. Left telescopic stop component; 1612. Right telescopic stop component; 1613. Web plate position sensor b; 1614. Wing plate position sensor b; 17. Fixed frame; 171. Fixed roller group; 18. Moving frame; 181. Support frame; 1811. Pivot a; 182. Moving roller group; 183. First servo electric cylinder; 1 84. Second servo electric cylinder; 19. Welding torch mechanism; 191. Welding torch; 192. Transverse block; 193. Servo drive motor; 194. Transverse seat; 20. First transfer station; 21. Conveyor line D; 22. Conveyor line E; 23. Transfer device A; 30. Welding station; 31. Welding workbench; 311. Base; 312. Platform plate; 313. Reference component A; 32. First positioning device; 33. Welding machine; 34. Conveyor line F; 35. Conveyor line G; 36. Transfer device B; 40. Second transfer station; 41. Second transfer device; 42. 43. Conveyor line B; 44. Second positioning device; 45. Conveyor line H; 46. Crossbeam; 47. Left reference component B; 48. Right reference component B; 49. Mounting base; 40. Gripper; 41. Third driving component; 42. Linkage plate; 43. Limiting block; 50. Correction station; 51. Correction mechanism; 52. Conveyor line C; 60. Variable cross-section H-beam; 61. Web plate; 62. Wing plate; 70. First sensor; 71. Second sensor; 72. Third sensor; 73. Fourth sensor; 74. Fifth sensor; 75. Sixth sensor. Detailed Implementation

[0050] The invention will now be further described with reference to the accompanying drawings.

[0051] The processing method of the present invention is applicable not only to H-beams with constant cross-section, but also to H-beams with variable cross-section 60. The present invention mainly describes the processing of H-beams with variable cross-section 60.

[0052] like Figures 1-20 As shown, a processing method for a variable cross-section H-beam 60 includes...

[0053] a: measure the size of the web plate 61 and the two side plates 62, input the measured size data into the control terminal, the control terminal analyzes the data and determines the variable cross-section H-shaped steel 60 prototype coordinate system and the variable cross-section H-shaped steel 60 prototype welding coordinate system;

[0054] b: according to the determined variable cross-section H-shaped steel 60 prototype coordinate system, the lifting mechanism 12 of the assembling device 11 lifts the web plate 61 to a set height, a plurality of left overturning mechanisms 13 clamp the left side plate 62 and overturn the left side plate 62 to one side of the web plate 61, a plurality of right overturning mechanisms 14 clamp the right side plate 62 and overturn the right side plate 62 to one side of the web plate 61, and according to the determined variable cross-section H-shaped steel 60 prototype coordinate system, the distance of each right overturning mechanism 14 transversely moving to one side of the web plate 61 is determined, so as to complete the pre-assembly and assembly of the variable cross-section H-shaped steel 60;

[0055] c: align the beginning of the web plate 61 and the two side plates 62 of the variable cross-section H-shaped steel 60 through the alignment mechanism 161;

[0056] d: according to the determined variable cross-section H-shaped steel 60 prototype coordinate system, the point welding device 16 adjusts the inclination angle of the clamping surface of the moving roller group 182, the left side plate 62 is fitted with the clamping surface of the fixed roller group 171, and the right side plate 62 is fitted with the clamping surface of the moving roller group 182, the welding gun mechanism 19 performs spot welding along the welding route coordinate system, and the moving roller group 182 adjusts the distance of transversely moving to one side of the fixed roller group 171 in real time according to the welding route coordinate system;

[0057] e: after the variable cross-section H-shaped steel 60 is completed, the variable cross-section H-shaped steel 60 is transferred to the welding workbench 31 through the first transfer device, the first end left side of the variable cross-section H-shaped steel 60 is positioned through the first positioning device 32, the left side of the variable cross-section H-shaped steel 60 is welded by the welding machine 33 according to the welding route coordinate system, then the right side of the variable cross-section H-shaped steel 60 is positioned through the first positioning device 32 and the first end right side of the variable cross-section H-shaped steel 60 is welded through the welding machine 33; after the first end of the variable cross-section H-shaped steel 60 is completed, the variable cross-section H-shaped steel 60 is overturned to make the second end of the variable cross-section H-shaped steel 60 set upward, and then the left and right sides of the variable cross-section H-shaped steel 60 are positioned through the first positioning device 32 and the left and right sides of the second end of the variable cross-section H-shaped steel 60 are welded through the welding machine 33;

[0058] f: After the welding of the variable cross-section H-shaped steel 60 is completed, the variable cross-section H-shaped steel 60 is transferred to the conveying line B 42 through the second transfer device 41, the variable cross-section H-shaped steel 60 is positioned by the left second positioning device 43, the first side of the variable cross-section H-shaped steel 60 is attached to the left reference component B 451, the variable cross-section H-shaped steel 60 is conveyed to the correction mechanism 51 through the conveying line B 42, the first side of the variable cross-section H-shaped steel 60 is corrected by the correction mechanism 51, and the variable cross-section H-shaped steel 60 is conveyed to the conveying line C 52;

[0059] g: The variable cross-section H-shaped steel 60 is returned to the conveying line B 42 through the conveying line C 52, the variable cross-section H-shaped steel 60 is positioned by the right second positioning device 43, the second side of the variable cross-section H-shaped steel 60 is attached to the right reference component B 452, the variable cross-section H-shaped steel 60 is conveyed to the correction mechanism 51 through the conveying line B 42, the second side of the variable cross-section H-shaped steel 60 is corrected by the correction mechanism 51, and the variable cross-section H-shaped steel 60 after the correction of the two sides is conveyed to the conveying line C 52;

[0060] h: When processing the same batch of variable cross-section H-shaped steels 60, steps b to g can be repeated; when processing another batch of variable cross-section H-shaped steels 60, steps a to g need to be repeated.

[0061] The processing station of the variable cross-section H-shaped steel 60 of the present application comprises the assembly station 10, the first transfer station 20, the welding station 30, the second transfer station 40 and the correction station 50 arranged longitudinally in sequence, wherein the spot welding device 16 is arranged on the assembly station 10 and located at the output end of the conveying line A 15 on the assembly station 10.

[0062] Wherein step b is the assembly step of the web plate 61 and the wing plates 62 on both sides, wherein the assembly station 10 comprises the conveying line A 15 and a plurality of mounting racks 111 arranged longitudinally between adjacent rollers of the conveying line A 15, each mounting rack 111 is provided with a set of left and right turnover mechanisms 13 and 14, and each mounting rack 111 is also provided with a first driving unit 112 for driving the right turnover mechanism 14 to move transversely relative to the mounting rack 111, the distance of each first driving unit 112 driving the corresponding right turnover mechanism 14 to move transversely is determined by the embryonic coordinate system of the variable cross-section H-shaped steel 60, so that the right wing plate 62 clamped by the right turnover mechanism 14 is closely attached to the hypotenuse of the web plate 61.

[0063] The lifting mechanism 12 comprises two groups of lifting assemblies arranged between the left and right turnover mechanisms 13 and 14, the two groups of lifting assemblies are staggered front and back, the lifting assembly comprises a support wheel seat and a lifting driving unit for driving the support wheel seat to lift, wherein the lifting driving unit can be a screw rod mechanism, a pneumatic cylinder or the like, or a driving motor, when the driving motor is used, a guide sleeve is fixedly installed on the mounting frame 111, a sliding rod is vertically slidably arranged in the guide sleeve, a tooth portion is arranged on the sliding rod, the support wheel seat is fixedly arranged on the upper end of the sliding rod, a gear meshingly and drivingly arranged with the tooth portion is rotatably arranged on the mounting frame 111, the driving motor drives the gear to rotate, the gear drives the sliding rod and the support wheel seat arranged on the upper end of the sliding rod to vertically lift.

[0064] The left turnover mechanism 13 comprises a left clamping component for clamping the left wing plate 62 and a left turnover component 135 for driving the left clamping component to turn over, and the right turnover mechanism 14 comprises a right clamping component for clamping the right wing plate 62 and a right turnover component 145 for driving the right clamping component to turn over.

[0065] The right clamping component comprises a moving seat 141, a right support seat 142, a right support roller 143, a right clamping wheel set 144 and a right driving member 146 for controlling the clamping of the right clamping wheel set 144. The first driving unit 112 can drive the moving seat 141 to reciprocate laterally along the mounting rack 111. The inner side of the right support seat 142 is reversibly arranged on the moving seat 141 through a first pivot 1421. The right support roller 143 is arranged on the right support seat 142 for supporting the right side wing plate 62. The right clamping wheel set 144 comprises a right fixed wheel arranged on the inner side of the right support seat 142 and a right moving wheel arranged on the outer side of the right support seat 142. The right driving member 146 can drive the right moving wheel to move relative to the right fixed wheel to clamp the right side wing plate 62. The right driving member 146 is preferably a rope type cylinder. The right reversing mechanism 14 can drive the right support seat 142 to rotate around the first pivot 1421, thereby realizing the reversing of the right support seat 142 and the right side wing plate 62. Similarly, the left clamping component comprises a fixed seat 131, a left support seat 132, a left support roller 133, a left clamping wheel set 134 and a left driving member 136 for controlling the clamping of the left clamping wheel set 134. The fixed seat 131 is fixedly installed on the left side of the mounting rack 111. The inner side of the left support seat 132 is reversibly arranged on the fixed seat 131 through a second pivot 1321. The left support roller 133 is rotatably installed on the left support seat 132. The left support rollers 133 of multiple left reversing assemblies cooperate to support the left side wing plate 62. The left clamping wheel set 134 is arranged on the side of the fixed seat 131 corresponding to the left support roller 133. The left clamping wheel set 134 comprises a left fixed wheel and a left moving wheel. The left driving member 136 can drive the left moving wheel to move relative to the left fixed wheel to clamp the left side wing plate 62. The left driving member 136 is preferably a rope type cylinder. The left reversing mechanism 13 can drive the left support seat 132 to rotate around the second pivot 1321, thereby realizing the reversing of the left support seat 132 and the left side wing plate 62. The first driving unit 112 comprises sprockets arranged on both sides of the mounting rack 111, chains wound around the sprockets and rotary motors for driving the sprockets to rotate.

[0066] At least two left support rollers 133 or right support rollers 143 adjacent to the spot welding device 16 are equipped with independent power units. The corresponding support rollers are driven to rotate by the independent power units to transport the pre-assembled variable cross-section H-shaped steel 60 prototype to one side of the spot welding device 16, thereby playing an auxiliary transportation role. The main transportation is realized through the conveying line A15.

[0067] The left support seat 132 and the right support seat 142 are provided with guide arc surfaces 147 adjacent to one end of the variable cross-section H-shaped steel 60. The guide arc surfaces 147 prevent the left support seat 132 and the right support seat 142 from interfering with the web plate 61 during reversing. The left moving wheel and the right moving wheel have a structure of being large at the top and small at the bottom, which can limit the wing plate 62 and prevent the wing plate 62 from falling off the clamping wheel set during reversing.

[0068] The web stopper 151, the wing stopper 152, the web position sensor a 153 and the two sets of wing position sensor a 154 are arranged between the assembling device 11 and the spot welding device 16, the wing stopper 152 is arranged in a flush manner, the web stopper 151 is arranged closer to the spot welding device 16 than the wing stopper 152, the web 61 and the wing 62 are conveyed by the conveying line A15 and stopped by the corresponding stopper, when the web position sensor a 153 detects that the web 61 is in place and the two sets of wing position sensor a 154 detects that the corresponding wing 62 is in place, the conveying line A15 stops conveying, at this time, the assembling work is started by the assembling device 11.

[0069] The alignment mechanism 161 includes the left telescopic stopper 1611, the right telescopic stopper 1612, the web position sensor b 1613 and the two sets of wing position sensor b 1614, when the profiled variable cross-section H-shaped steel 60 is conveyed, the left telescopic stopper 1611 stops the left wing 62 and the web 61 of the profiled variable cross-section H-shaped steel 60, the right telescopic stopper 1612 stops the right wing 62 and the web 61 of the profiled variable cross-section H-shaped steel 60, so as to complete the alignment of the first end of the profiled variable cross-section H-shaped steel 60, when the web position sensor b 1613 detects that the web 61 is in place and the two sets of wing position sensor b 1614 detects that the corresponding wing 62 is in place, the left telescopic stopper 1611 and the right telescopic stopper 1612 are retracted to release the stop and limit of the profiled variable cross-section H-shaped steel 60. Specifically, the left telescopic stopper 1611 and the right telescopic stopper 1612 include a stopper rod and a pneumatic cylinder, the stopper rod is driven to extend and retract by the pneumatic cylinder to achieve the purpose of stopping and releasing the stop, in order to prevent the stopper rod and the output end of the pneumatic cylinder from being bent under pressure, a guide sleeve is arranged on the rack, and the stopper rod is slidably arranged in the guide sleeve.

[0070] In step e: after the variable cross-section H-beam 60 is completed spot welding, the variable cross-section H-beam 60 is transferred to the welding workbench 31 by the first transfer device, the first positioning device 32 retracts to make the left side of the variable cross-section H-beam 60 abut against the left side reference component A313 of the welding workbench 31, the welding machine 33 welds the left side of the variable cross-section H-beam 60 according to the welding route coordinate system, after the left side of the variable cross-section H-beam 60 is completed welding, the first positioning device 32 fully extends (the welding workbench 31 is inclined to the right side), at this time, the right side of the variable cross-section H-beam 60 abuts against the right side reference component A313 of the welding workbench 31, the right side of the variable cross-section H-beam 60 is welded by the welding machine 33, then the variable cross-section H-beam 60 is turned over by the turnover mechanism to make the second end of the variable cross-section H-beam 60 set upward, the first positioning device 32 retracts to make the left side of the variable cross-section H-beam 60 abut against the left side reference component A313 of the welding workbench 31, the left side of the second end of the variable cross-section H-beam 60 is welded by the welding machine 33, after the left side of the second end of the variable cross-section H-beam 60 is completed welding, the first positioning device 32 fully extends, at this time, the right side of the variable cross-section H-beam 60 abuts against the right side reference component A313 of the welding workbench 31, the right side of the second end of the variable cross-section H-beam 60 is welded by the welding machine 33.

[0071] The frame of the spot welding device 16 is provided with a fixed frame 17, a moving frame 18, a support frame 181, a first servo cylinder 183 and a second servo cylinder 184, the fixed roller group 171 is fixedly arranged on the left side of the frame through the fixed frame 17, the moving frame 18 is arranged on the right side of the frame and can move horizontally, the support frame 181 is rotatably installed on the moving frame 18 through a pivot a1811, the moving roller group 182 is arranged on the support frame 181, the first servo cylinder 183 and the second servo cylinder 184 are fixedly installed on the two sides of the pivot a1811 of the frame, the inclination angle of the clamping end of the moving roller group 182 is adjusted through the cooperation of the first servo cylinder 183 and the second servo cylinder 184, and the horizontal moving distance of the moving roller group 182 is adjusted in real time, when one of the servo cylinders acts, the support frame 181 can rotate around the pivot a1811 as the rotation axis; when the two servo cylinders act synchronously, the support frame 181, the moving frame 18 and the moving roller group 182 can be synchronously moved horizontally and reciprocally. That is, the inclination angle of the clamping surface of the moving roller group 182 is adjusted by adjusting the extension amount of the first servo cylinder 183 in the initial state, so that it is consistent with the inclination angle of the right side wing plate 62, when the first servo cylinder 183 and the second servo cylinder 184 advance synchronously, the support frame 181, the moving frame 18 and the moving roller group 182 can advance horizontally and synchronously to make the clamping surface of the moving roller group 182 adjust the horizontal moving distance to the side of the fixed roller group 171 according to the welding route coordinate system in real time.

[0072] The spot welding device 16 is provided with a welding gun mechanism 19 on the left and right sides of the rack, the welding gun mechanism 19 includes a welding gun 191, a lifting assembly for vertically lifting the welding gun, and a servo drive mechanism for horizontally moving the welding gun, the servo drive mechanism includes a servo drive motor 193, a gear arranged at the output end of the servo drive motor 193, a horizontal moving block 192 arranged on the welding gun, a rack part arranged on the horizontal moving block 192 and in meshing transmission with the gear, and a horizontal moving seat 194 fixed on the rack, and the horizontal moving block 192 is horizontally and slidably arranged on the horizontal moving seat 194.

[0073] The first transfer station 20 is arranged between the spot welding device 16 and the welding device, the first transfer station 20 includes a conveying line D21 and a conveying line E22 arranged transversely to the conveying line D21, the conveying line D21 is arranged at a position corresponding to the discharge port of the spot welding device 16, the first transfer device includes a transfer device A23, the transfer device A23 is used to transfer the variable cross-section H-shaped steel 60 from the conveying line D21 to the conveying line E22, the welding workbench 31 is provided with a conveying line F34 and a conveying line G35 on the two sides respectively, the conveying line F34 is arranged on the extension line of the conveying line E22, so that the variable cross-section H-shaped steel 60 can be directly conveyed from the conveying line E22 to the conveying line F34, the first transfer device further includes a transfer device B36, the transfer device B36 is used to transfer the variable cross-section H-shaped steel 60 on the conveying line F34 to the welding workbench 31, and after the variable cross-section H-shaped steel 60 is welded, the transfer device B is used to transfer the variable cross-section H-shaped steel 60 from the welding workbench 31 to the conveying line G35, wherein the transfer device A23 is a conventional technical means in the art, for example, refer to the Chinese patent (authorized publication number CN217296054U) disclosed in a kind of anti-toppling steel moving machine. The turnover mechanism is arranged on the transfer device B36 and moves synchronously with the transfer device, which is a conventional technical means in the art, for example, refer to the Chinese patent (application publication number CN114701814A) disclosed in a kind of steel member processing turnover trolley.

[0074] The welding station 30 is provided with at least one group of longitudinally arranged welding units, each welding unit includes at least one group of transversely arranged welding workbenches 31, a welding machine 33 corresponding to the welding workbench 31, and a conveying line F34 and a conveying line G35 arranged on the two sides of the welding workbench 31, the variable cross-section H-shaped steel 60 is transferred between the conveying line F34, the welding workbench 31 and the conveying line G35 by the transfer device B36.

[0075] The second transfer station 40 comprises a conveying line B 42 and a conveying line H 44, and the conveying line H 44 is arranged beside the conveying line B 42 and on the extension line of the conveying line G 35, so that the variable cross-section H-shaped steel 60 can be directly conveyed from the conveying line G 35 to the conveying line H 44, and the variable cross-section H-shaped steel 60 is transferred from the conveying line H 44 to the conveying line B 42 by the second transfer device 41, wherein the second transfer device 41 is a prior art, for example, refer to the Chinese patent (authorized publication number CN217296054U) disclosed a kind of anti-toppling steel moving machine.

[0076] As shown in Figure 15 The first positioning device 32 comprises a second driving unit, and each set of welding workbench 31 comprises a plurality of sets of turnover platforms arranged longitudinally in a spaced manner, and the turnover platform comprises a base 311 and a platform plate 312 rotatably arranged on the base 311, the left side of the platform plate 312 is provided with a reference component A 313, and a plurality of second driving units are arranged on the base 311, the body of the second driving unit is hinged on the base 311, and the output end of the second driving unit is hinged on the platform plate 312, when the second driving unit is retracted, the platform plate 312 is turned to the left side, so that the first side of the variable cross-section H-shaped steel 60 abuts against the reference component A 313, at this time, the welding machine 33 moves longitudinally to weld the left side weld of the first end of the variable cross-section H-shaped steel 60 along the length direction of the variable cross-section H-shaped steel 60, after welding, the second driving unit returns to the extended state (the platform plate 312 is in the horizontal state), the variable cross-section H-shaped steel 60 is shifted by the turnover mechanism, so that the right side wing plate of the variable cross-section H-shaped steel 60 abuts against the right side reference component A 313, at this time, the second driving unit is extended to turn the platform plate 312 to the right side, so that the welding of the right side weld of the first end of the variable cross-section H-shaped steel 60 can be carried out, after welding, the second driving unit returns to the extended state (the platform plate 312 is in the horizontal state), the variable cross-section H-shaped steel 60 is turned over by the turnover mechanism, so that the second end of the variable cross-section H-shaped steel 60 is arranged upward, the welding of the second end weld is completed according to the above steps, after the welding of the second end of the variable cross-section H-shaped steel 60 is completed, the variable cross-section H-shaped steel 60 is transferred to the conveying line G 35 by the transfer device B 36.

[0077] A plurality of groups of beams 45 are arranged longitudinally between adjacent rollers of the conveying line B42, left reference components B451 and right reference components B452 are arranged on both sides of the beams 45 respectively, and the second positioning devices 43 are arranged on both sides of the beams 45. Further, the second positioning devices 43 comprise mounting seats 453 arranged transversely on the beams 45, at least one group of clamping jaws 454 pivotally mounted on the mounting seats 453, and third driving members 455 for driving the clamping jaws 454 to rotate, the third driving members 455 can drive the clamping jaws 454 to rotate between a release position and a clamping position, and can also drive the mounting seats 453 to move transversely, when the third driving members 455 act, the clamping jaws 454 rotate towards the release position, and drive the mounting seats 453 and the clamping jaws 454 to move towards the middle of the beams 45; when the third driving members 455 retract, the clamping jaws 454 rotate towards the clamping position, and drive the mounting seats 453 and the clamping jaws 454 to move towards one side of the corresponding reference wheel group.

[0078] The middle of the clamping jaws 454 is connected to the mounting seat 453 through a pin shaft a, the output end of the driving member is connected with a linkage plate 456, the lower part of the clamping jaws 454 is connected to the linkage plate 456 through a pin shaft b, the upper part of the clamping jaws 454 is provided with a clamping part, the mounting seat 453 is provided with limit blocks 457 corresponding to both ends of the linkage plate 456, the linkage plate 456 is driven to move by the driving member to drive the clamping jaws 454 to rotate around the pin shaft a, when the linkage plate 456 moves to abut against the limit blocks 457, the mounting seat 453 is driven to move transversely along the beams 45, in order to ensure the stability of the transverse sliding of the mounting seat 453, a guide structure is arranged on the beams 45 to support and guide the mounting frame 111.

[0079] The left reference components B451 are arranged on the left side of the conveying line B42, and the right reference components B452 are arranged on the right side of the conveying line B42, and the second positioning devices 43 are arranged on both sides of the conveying line B42 respectively, the second positioning device 43 corresponding to the first side of the web plate 61 of the variable cross-section H-shaped steel 60 can push the variable cross-section H-shaped steel 60 and stably clamp the variable cross-section H-shaped steel 60 on the corresponding left reference component B451, and then the first side of the web plate 61 of the variable cross-section H-shaped steel 60 can be corrected by the correcting device; after the single-side correction is completed, the variable cross-section H-shaped steel 60 can be retreated to the conveying line B42 under the action of the conveying line C52, at this time, the right reference component B452 pushes the variable cross-section H-shaped steel 60 and stably clamps the variable cross-section H-shaped steel 60 on the right reference component B452, and the second side of the web plate 61 of the variable cross-section H-shaped steel 60 is corrected by the correcting device, so as to realize the correction of the two welding ends of the variable cross-section H-shaped steel 60.

[0080] The left and right sides of the correcting device are respectively provided with correcting mechanisms 51, specifically, left correcting mechanism 51 and right correcting mechanism 51, wherein the left correcting mechanism 51 is used for correcting the left end of the variable cross-section H-shaped steel 60, and the right correcting mechanism 51 is used for correcting the right end of the variable cross-section H-shaped steel 60.

[0081] The conveying line D21, the conveying line F34 and the conveying line H44 are respectively provided with a first sensor 70 at the starting end, a second sensor 71 at the middle region and a third sensor 72 at the tail end, the conveying line E22 and the conveying line G35 are respectively provided with the second sensor 71 and the third sensor 72, the conveying line B42 is provided with the second sensor 71 and a fourth sensor 73 at the tail end of the conveying line B42, the first sensor 70 is used for detecting whether the variable cross-section H-shaped steel 60 starts to enter the conveying line, the second sensor 71 is used for detecting and acquiring whether the variable cross-section H-shaped steel 60 exists on the conveying line, the third sensor 72 is used for preventing the variable cross-section H-shaped steel 60 from being conveyed too much, and the fourth sensor 73 is used for detecting and acquiring the end position information of the variable cross-section H-shaped steel 60 before entering the correcting device.

[0082] The spot welding device 16 comprises a fifth sensor 74 arranged at the input end of the rack and a sixth sensor 75 arranged at the output end of the rack, the fifth sensor 74 is used for detecting whether the variable cross-section H-shaped steel 60 starts to enter the rack, and the sixth sensor 75 is used for detecting whether the variable cross-section H-shaped steel 60 completely drives out of the rack of the spot welding device 16.

[0083] The transportation flow of the variable cross-section H-shaped steel 60 of the present application is as follows:

[0084] 1. The web plate 61 and the two side plates 62 are conveyed through the conveying line A15; the web plate 61 is stopped by the web plate stop piece 151, and the two side plates 62 are stopped by the two side plate stop pieces 152; when the web plate position sensor a153 detects that the web plate 61 is in place, and the two groups of side plate position sensors a154 all detect that the corresponding side plates 62 are in place, the conveying line A15 stops conveying, and the assembling device 11 starts to pre-assemble and assemble;

[0085] 2. The pre-assembled variable cross-section H-beam 60 moves towards the spot welding device 16. When the fifth sensor 74 detects a signal, it indicates that the variable cross-section H-beam 60 profile begins to enter the frame of the spot welding device 16. The first end of the variable cross-section H-beam 60 profile is aligned with the stop of the left and right telescopic stop pieces 1611 and 1612. When the web position sensor b1613 detects a signal from the web 61 and the two sets of wing plate position sensors b1614 detect signals from the wing plates 62, the left and right telescopic stop pieces 1611 and 1612 release the stop function on the variable cross-section H-beam 60 profile. The angle-adjusted moving roller group 182 clamps the right wing plate 62, the fixed roller group 171 clamps the left wing plate 62, and the welding gun mechanism 19 performs interval spot welding according to the welding route coordinate system.

[0086] 3. When the sixth sensor 75 detects the signal transition from being able to detect the signal to being unable to detect the signal, it indicates that the variable cross-section H-beam 60 has completed the spot welding work and left the rack of the spot welding device 16. When the first sensor 70 on the conveying line D 21 detects the signal, it indicates that the variable cross-section H-beam 60 has started to enter the conveying line D 21. When the second sensor 71 on the conveying line D 21 detects the signal, it indicates that the variable cross-section H-beam 60 exists in the middle region of the conveying line D 21. The variable cross-section H-beam 60 is transferred from the conveying line D 21 to the conveying line E 22 by the transfer device A 23. When the second sensor 71 on the conveying line E 22 detects the signal, it indicates that the variable cross-section H-beam 60 exists in the middle region of the conveying line E 22. The variable cross-section H-beam 60 can be directly transferred from the conveying line E 22 to the conveying line F 34. When the first sensor 70 on the conveying line F 34 detects the signal, it indicates that the variable cross-section H-beam 60 has started to enter the conveying line F 34. When the second sensor 71 on the conveying line F 34 detects the signal, it indicates that the variable cross-section H-beam 60 exists in the middle region of the conveying line F 34. The variable cross-section H-beam 60 on the conveying line F 34 is transferred to the welding workbench 31 by the transfer device B 36. After the variable cross-section H-beam 60 is welded, it is transferred from the welding workbench 31 to the conveying line G 35 by the transfer device B. When the second sensor 71 on the conveying line G 35 detects the signal, it indicates that the variable cross-section H-beam 60 exists in the middle region of the conveying line G 35. The variable cross-section H-beam 60 can be directly transferred from the conveying line G 35 to the conveying line H 44. When the first sensor 70 on the conveying line H 44 detects the signal, it indicates that the variable cross-section H-beam 60 has started to enter the conveying line H 44. When the second sensor 71 on the conveying line H 44 detects the signal, it indicates that the variable cross-section H-beam 60 exists in the middle region of the conveying line H 44. The variable cross-section H-beam 60 is transferred from the conveying line H 44 to the conveying line B 42 by the second transfer device 41. When the second sensor 71 on the conveying line B 42 detects the signal, it indicates that the variable cross-section H-beam 60 exists in the middle region of the conveying line B 42. At this time, the conveying line B 42 starts to transport. When the fourth sensor 73 on the conveying line B 42 detects the signal, the second positioning device 43 starts to position the first side of the variable cross-section H-beam 60. After the positioning is completed, the conveying line B 42 transports the variable cross-section H-beam 60 to the correction mechanism 51. The first side of the variable cross-section H-beam 60 is corrected by the correction mechanism 51. After the correction of the variable cross-section H-beam 60 is completed, the variable cross-section H-beam 60 is on the conveying line C 52. Then the conveying line C 52 retreats the variable cross-section H-beam 60 to the conveying line B 42. The second side of the variable cross-section H-beam 60 is positioned by the second positioning device 43. After the positioning is completed, the conveying line B 42 transports the variable cross-section H-beam 60 to the correction mechanism 51. The second side of the variable cross-section H-beam 60 is corrected by the correction mechanism 51.

[0087] The above description is only the preferred embodiment of the present application, and equivalent changes or modifications made according to the structure, features and principles described in the patent application scope of the present application are included in the patent application scope of the present application.

Claims

1. A method for machining a variable cross-section H-beam, characterized by: comprising a: measure the size of the web plate (61) and the two side plates (62), input the measured size data into the control terminal, the control terminal analyzes the data and determines the variable cross-section H-shaped steel (60) prototype coordinate system and the variable cross-section H-shaped steel (60) prototype welding coordinate system; b: according to the determined variable cross-section H-shaped steel (60) prototype coordinate system, the lifting mechanism (12) of the assembly device (11) lifts the web plate (61) to a set height, a plurality of left overturning mechanisms (13) clamp the left side plate (62) and drive it to overturn towards the web plate (61), a plurality of right overturning mechanisms (14) clamp the right side plate (62) and drive it to overturn towards the web plate (61), and according to the determined variable cross-section H-shaped steel (60) prototype coordinate system, the distance of each right overturning mechanism (14) transversely moving towards the web plate (61) is determined, so as to complete the pre-assembly and assembly of the variable cross-section H-shaped steel (60); c: align the beginning of the web plate (61) and the two side plates (62) of the variable cross-section H-shaped steel (60) through the alignment mechanism (161); d: according to the determined variable cross-section H-shaped steel (60) prototype coordinate system, the point welding device (16) adjusts the inclination angle of the clamping surface of the moving roller group (182), so that the left side plate (62) is fitted with the clamping surface of the fixed roller group (171), and the right side plate (62) is fitted with the clamping surface of the moving roller group (182), the welding gun mechanism (19) performs spot welding along the welding route coordinate system, and the moving roller group (182) adjusts the transverse distance towards the fixed roller group (171) in real time according to the welding route coordinate system; e: after the variable cross-section H-shaped steel (60) is completed, the variable cross-section H-shaped steel (60) is transferred to the welding workbench (31) through the first transfer device, the first positioning device (32) positions the left side of the variable cross-section H-shaped steel (60), the welding machine (33) welds the left side of the variable cross-section H-shaped steel (60) according to the welding route coordinate system, and then the first positioning device (32) positions the right side of the variable cross-section H-shaped steel (60) and the welding machine (33) welds the right side of the variable cross-section H-shaped steel (60); after the first end of the variable cross-section H-shaped steel (60) is completed, the variable cross-section H-shaped steel (60) is overturned to make the second end of the variable cross-section H-shaped steel (60) upwardly arranged, and then the first positioning device (32) positions the left and right sides of the variable cross-section H-shaped steel (60) in sequence and the welding machine (33) welds the left and right sides of the second end of the variable cross-section H-shaped steel (60); f: After the variable cross-section H-beam (60) is completed, the variable cross-section H-beam (60) is transported to the conveying line B (42) by the second transfer device (41), the variable cross-section H-beam (60) is positioned by the left second positioning device (43), the first side of the variable cross-section H-beam (60) is attached to the left reference component B (451), the variable cross-section H-beam (60) is conveyed to the correction mechanism (51) by the conveying line B (42), the first side of the variable cross-section H-beam (60) is corrected by the correction mechanism (51), and the variable cross-section H-beam (60) is conveyed to the conveying line C (52); g: The variable cross-section H-beam (60) is returned to the conveying line B (42) by the conveying line C (52), the variable cross-section H-beam (60) is positioned by the right second positioning device (43), the second side of the variable cross-section H-beam (60) is attached to the right reference component B (452), the variable cross-section H-beam (60) is conveyed to the correction mechanism (51) by the conveying line B (42), the second side of the variable cross-section H-beam (60) is corrected by the correction mechanism (51), and the variable cross-section H-beam (60) after being corrected on both sides is conveyed to the conveying line C (52); h: When processing the same batch of variable cross-section H-beams (60), steps b-g can be repeated; when processing another batch of variable cross-section H-beams (60), steps a-g need to be repeated.

2. A method for processing a variable cross-section H-beam according to claim 1, characterized in that: The web stopper (151), the wing plate stopper (152), the web position sensor a (153), and the two sets of wing plate position sensors a (154) are arranged between the assembly device (11) and the spot welding device (16), the position of the web stopper (151) is closer to the spot welding device (16) than that of the wing plate stopper (152), the web (61) and the wing plate (62) are conveyed by the conveying line A (15) and stopped by the corresponding stoppers, when the web position sensor a (153) detects the web (61) and the two wing plate position sensors a (154) detect the corresponding wing plates (62) at the same time, the conveying line A (15) stops conveying, at this time, the assembly work is carried out by the assembly device (11).

3. The method for processing a variable cross-section H-beam according to claim 1, wherein: The alignment mechanism (161) includes the left telescopic stopper (1611), the right telescopic stopper (1612), the web position sensor b (1613), and the two sets of wing plate position sensors b (1614), when the variable cross-section H-beam (60) is conveyed, the left wing plate (62) and the web (61) of the variable cross-section H-beam (60) are stopped by the left telescopic stopper (1611), the right wing plate (62) and the web (61) of the variable cross-section H-beam (60) are stopped by the right telescopic stopper (1612), so as to complete the alignment of the first end of the variable cross-section H-beam (60), when the web position sensor b (1613) detects that the web (61) is in place and the two sets of wing plate position sensors b (1614) both detect that the corresponding wing plates (62) are in place at the same time, the left telescopic stopper (1611) and the right telescopic stopper (1612) are retracted to release the stop and limit of the variable cross-section H-beam (60).

4. The method for processing a variable cross-section H-beam according to claim 2, wherein: A plurality of groups of mounting frames (111) are arranged longitudinally between adjacent rollers of the conveying line A (15), each group of mounting frames (111) is provided with a group of left overturning mechanisms (13) and right overturning mechanisms (14), each group of mounting frames (111) is provided with a first driving unit (112) for driving the corresponding right overturning mechanism (14) to move transversely relative to the left overturning mechanism (13), the distance of each group of first driving units (112) for driving the corresponding right overturning mechanism (14) to move transversely is determined by the profile coordinate system of the variable cross-section H-shaped steel (60), so that the right side wing plate (62) clamped by the right overturning mechanism (14) is tightly fitted with the hypotenuse of the web plate (61).

5. The method for processing a variable cross-section H-beam according to claim 1, wherein: The rack of the spot welding device (16) is provided with a fixed frame (17), a moving frame (18), a support frame (181), a first servo cylinder (183) and a second servo cylinder (184), the fixed roller group (171) is fixedly installed on the left side of the rack through the fixed frame (17), the moving frame (18) is transversely movably arranged on the right side of the rack, the support frame (181) is rotatably installed on the moving frame (18) through the pivot a (1811), the moving roller group (182) is arranged on the support frame (181), the first servo cylinder (183) and the second servo cylinder (184) are fixedly installed on the two sides of the pivot a (1811) of the rack, and the inclination angle of the clamping end of the moving roller group (182) is adjusted through the cooperation of the first servo cylinder (183) and the second servo cylinder (184), while the transverse movement distance of the moving roller group (182) is adjusted in real time.

6. The method for processing a variable-flange H-beam according to claim 1, wherein: The first transfer station (20) is arranged between the spot welding device (16) and the welding device, the first transfer station (20) comprises a conveying line D (21) and a conveying line E (22) arranged transversely apart from the conveying line D (21), the conveying line D (21) is arranged at a position corresponding to the discharge port of the spot welding device (16), the first transfer device comprises a transfer device A (23), which transfers the variable cross-section H-shaped steel (60) from the conveying line D (21) to the conveying line E (22), the welding workbench (31) is provided with a conveying line F (34) and a conveying line G (35) on the two sides respectively, the conveying line F (34) is arranged on the extension line of the conveying line E (22), so that the variable cross-section H-shaped steel (60) can be directly conveyed from the conveying line E (22) to the conveying line F (34), the first transfer device further comprises a transfer device B (36), which transfers the variable cross-section H-shaped steel (60) on the conveying line F (34) to the welding workbench (31), and the variable cross-section H-shaped steel (60) is transferred from the welding workbench (31) to the conveying line G (35) by the rotating device B after completing welding.

7. A method for processing a variable cross-section H-beam according to claim 6, wherein: A conveying line H (44) is arranged beside the conveying line B (42) and is arranged on the extension line of the conveying line G (35) so that the variable cross-section H-shaped steel (60) can be directly conveyed from the conveying line G (35) to the conveying line H (44), and the variable cross-section H-shaped steel (60) is transferred from the conveying line H (44) to the conveying line B (42) by the second transfer device (41).

8. The method for processing a variable cross-section H-beam according to claim 6, wherein: The conveying line D (21), the conveying line F (34) and the conveying line H (44) are respectively provided with a first sensor (70) at the beginning, a second sensor (71) at the middle and a third sensor (72) at the end, the conveying line E (22) and the conveying line G (35) are respectively provided with the second sensor (71) and the third sensor (72), the conveying line B (42) is provided with the second sensor (71) and a fourth sensor (73) at the end of the conveying line B (42), the first sensor (70) is used to detect whether the variable cross-section H-shaped steel (60) starts to enter the conveying line, the second sensor (71) is used to detect and obtain whether the variable cross-section H-shaped steel (60) exists in the middle region of the conveying line, the third sensor (72) is used to prevent the variable cross-section H-shaped steel (60) from being conveyed too far, and the fourth sensor (73) is used to detect and obtain the end position information of the variable cross-section H-shaped steel (60) before entering the correcting device.

9. A method for processing a variable cross-section H-beam according to claim 8, wherein: The spot welding device (16) comprises a fifth sensor (74) arranged at the input end of the frame and a sixth sensor (75) arranged at the output end of the frame, the fifth sensor (74) is used to detect whether the variable cross-section H-shaped steel (60) starts to enter the frame, and the sixth sensor (75) is used to detect whether the variable cross-section H-shaped steel (60) completely exits the frame of the spot welding device (16).

10. The method for processing a variable cross-section H-beam steel according to any one of claims 1 to 9, wherein: The spot welding device (16) is provided with a welding gun mechanism (19) on the left and right sides of the frame, the welding gun mechanism (19) comprises a welding gun (191), a lifting assembly for vertically lifting the welding gun, and a servo driving mechanism for horizontally moving the welding gun.

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