An automated steel pipe truss production line

Abstract

The present invention relates to the technical field of steel tube truss production, and in particular to an automated steel tube truss production line, comprising a pay-off mechanism, a straightening mechanism, a bending mechanism, a welding mechanism, a stepping mechanism, a cutting mechanism, and a material receiving rack, which are sequentially arranged along a first direction. The pay-off mechanism can rotate and release web bars or lower chord bars in a coiled state; the straightening mechanism can straighten the web bars and lower chord bars; the bending mechanism can bend the web bars into a wave shape; the welding mechanism can weld the wave crests of the steel tube to the web bars and the wave troughs of the lower chord bars to the web bars; the stepping mechanism can transport the welded steel tube trusses backward to a predetermined length; the cutting mechanism cuts the steel tube trusses; and the material receiving rack is used to hold the cut steel tube trusses. The present invention integrates loading, straightening, bending, welding, fixed-length feeding, and cutting, has a high degree of automation, and has a compact production line layout and high production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of steel tube truss production, and in particular to an automated steel tube truss production line. Background Art

[0002] With the continuous development of construction technology, various trusses are being used more and more widely, among which the application demand of steel tube trusses is also increasing day by day. The automated production of steel tube trusses has very high requirements on the production method. Highly automated and large-scale production of steel tube trusses has always been a problem. The existing steel tube truss production lines generally have problems such as low degree of automation, dispersed structure and low work efficiency. Summary of the Invention

[0003] The object of the present invention is to provide an automated steel pipe truss production line with a high degree of automation, a compact structure and high working efficiency.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] An automated steel pipe truss production line comprises a pay-off mechanism, a straightening mechanism, a bending mechanism, a welding mechanism, a stepping mechanism, a cutting mechanism, and a material receiving frame sequentially arranged along a first direction, wherein the straightening mechanism, the bending mechanism, the welding mechanism, the stepping mechanism, and the cutting mechanism are all arranged on a fixed bottom beam;

[0006] There are four pay-off mechanisms, each of which is used to place two coils of web bars and two coils of lower chord bars, and is capable of rotating and releasing the coiled web bars and lower chord bars.

[0007] The straightening mechanism is used to receive the web bars and lower chord bars released by the pay-off mechanism and to straighten the web bars and lower chord bars;

[0008] The bending mechanism is used to receive the web bars and lower chord bars conveyed by the straightening mechanism and the steel pipes placed manually, and is capable of bending the web bars into a wave shape, and is capable of conveying the web bars, lower chord bars and steel pipes backward;

[0009] The welding mechanism is used to receive the web reinforcement, lower chord reinforcement and steel pipe delivered by the bending mechanism, and is capable of welding the steel pipe to the wave crest of the web reinforcement and welding the lower chord reinforcement to the wave trough of the web reinforcement;

[0010] The stepping mechanism is used to transport the welded steel pipe truss backward to a fixed length;

[0011] The cutting mechanism is used to cut the welded steel tube truss from the continuously conveyed web bars and lower chord bars;

[0012] The material receiving rack is used for holding the steel pipe trusses cut off by the cutting mechanism.

[0013] Preferably, the pay-off mechanism includes a pay-off turntable and a pay-off motor, the web bars and lower chord bars in the form of coils are wound around the pay-off turntable, and the pay-off motor is used to drive the pay-off turntable to rotate to release the web bars and lower chord bars.

[0014] Preferably, the straightening mechanism includes a group of web bar straightening parts and two groups of lower chord bar straightening parts. The two web bars are straightened and conveyed simultaneously by the group of web bar straightening parts, and the two lower chord bars are straightened and conveyed separately by the two groups of lower chord bar straightening parts. The web bar straightening parts and the lower chord bar straightening parts each include two straightening plates perpendicular to each other, and two rows of rollers arranged at intervals are provided on the straightening plates. The web bars and lower chord bars can pass between the two rows of rollers.

[0015] Preferably, the bending mechanism includes a web bar bending assembly, a web bar conveying assembly, and a lower chord bar and steel pipe conveying assembly. The web bar bending assembly is used to receive the two web bars conveyed by the straightening mechanism, and is used to simultaneously bend the two web bars into a wavy shape. The web bar conveying assembly is used to convey the bent web bars backward. The lower chord bar and steel pipe conveying assembly is used to receive the two lower chord bars conveyed by the straightening mechanism and the steel pipes placed manually, and is used to convey the lower chord bar and steel pipe backward.

[0016] Preferably, the web reinforcement bending assembly includes a bending drive assembly and an upper bending swing arm and a lower bending swing arm spaced apart in a direction perpendicular to the first direction, and the bending drive assembly can drive the upper bending swing arm and the lower bending swing arm to swing so as to bend the web reinforcement conveyed between the upper bending swing arm and the lower bending swing arm.

[0017] Preferably, the web reinforcement conveying assembly includes a first conveying drive assembly, a driving gear plate, a driven gear plate, a chain and a conveying pin, the axes of the driving gear plate and the driven gear plate are perpendicular to the first direction, the chain is wound around the driving gear plate and the driven gear plate, the first conveying drive assembly can drive the driving gear plate to rotate, the conveying pin is set on the chain, and the conveying pin can move the bent and formed part of the web reinforcement.

[0018] Preferably, the lower chord rib and steel pipe conveying assembly includes a second conveying drive assembly, a guide rail, a connecting seat block, a steel pipe conveying seat and a lower chord rib conveying seat, the guide rail is distributed along the first direction, the second conveying drive assembly can drive the connecting seat block to move back and forth along the guide rail, and one steel pipe conveying seat and two lower chord rib conveying seats are provided on the connecting seat block, the steel pipe conveying seat is located above the lower chord rib conveying seat, and the two lower chord rib conveying seats are staggered in the horizontal direction, and the steel pipe conveying seat and the lower chord rib conveying seat both include multiple rows of pushing wheel groups arranged along the first direction, the pushing wheel group includes two spaced apart pushing wheels, the pushing wheel is installed on the pushing wheel shaft through a one-way bearing, and the one-way bearing is configured to make the pushing wheel rotate unidirectionally from the bending mechanism to the straightening mechanism.

[0019] Preferably, the welding mechanism includes a welding clamping assembly, an upper welding assembly and a lower welding assembly which are arranged in sequence. The welding clamping assembly can respectively clamp the bent parts of the two web bars to the two opposite sides of the clamping seat. The lower chord bar and steel pipe conveying assembly can convey the steel pipe to the top end of the bent parts of the two web bars, and can convey the two lower chord bars to the bottom end of the bent parts of the two web bars respectively. The upper welding assembly can weld the steel pipe to the peaks of the two web bars, and the lower welding assembly can weld the lower chord bar to the trough of the corresponding web bar.

[0020] Preferably, the stepping mechanism includes a stepping drive assembly, a stepping base plate, an upper clamping assembly and a lower clamping assembly. The stepping drive assembly is used to drive the stepping base plate to feed the fixed length along the first direction. The upper clamping assembly and the lower clamping assembly are both arranged on the stepping base plate. The upper clamping assembly is used to clamp the steel pipe in the steel pipe truss, and the lower clamping assembly can clamp the lower chord in the steel pipe truss.

[0021] Preferably, the cutting mechanism includes a shearing motor, a shearing crankshaft, a shearing connecting rod, a shearing swing arm and a shearing knife. The shearing motor is driven and connected to the shearing crankshaft. One end of the two shearing connecting rods is hinged to the shearing crankshaft. The other ends of the two shearing connecting rods are respectively hinged to one end of the two shearing swing arms. The two shearing knives are respectively arranged at the other ends of the two shearing swing arms, and the two shearing knives are arranged opposite to each other.

[0022] Beneficial effects of the present invention:

[0023] The automated steel pipe truss production line provided by the present invention integrates feeding, straightening, bending, welding, length-fixed feeding and cutting, has a high degree of automation, and has a compact production line layout and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is the main view of the steel tube truss without the bottom chord;

[0025] Figure 2 This is a side view of a steel tube truss without bottom chords;

[0026] Figure 3 This is the main view of the steel tube truss with the bottom chord;

[0027] Figure 4 It is a side view of a steel tube truss with bottom chord;

[0028] Figure 5 This is a front view of an automated steel pipe truss production line provided by an embodiment of the present invention;

[0029] Figure 6 is a top view of an automated steel pipe truss production line provided by an embodiment of the present invention;

[0030] Figure 7 1 is a schematic structural diagram of a wire-releasing mechanism involved in an embodiment of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the straightening mechanism and the bending mechanism involved in the embodiment of the present invention;

[0032] Figure 9 Schematic diagram of the structure of the bending drive assembly involved in the embodiment of the present invention;

[0033] Figure 10 yes Figure 9 Cross-sectional view along AA direction;

[0034] Figure 11 It is a partial structural diagram of the web reinforcement conveying assembly involved in an embodiment of the present invention;

[0035] Figure 12 Schematic diagram of the structure of the lower chord reinforcement and steel pipe conveying assembly involved in an embodiment of the present invention;

[0036] Figure 13 Schematic diagram of the structure of the welding mechanism involved in the embodiment of the present invention;

[0037] Figure 14 Schematic diagram of the structure of the welding and clamping assembly involved in the embodiment of the present invention;

[0038] Figure 15 Schematic diagram of the structure of the upper welding assembly involved in the embodiment of the present invention;

[0039] Figure 16 1 is a schematic structural diagram of a lower welding assembly involved in an embodiment of the present invention;

[0040] Figure 17Schematic diagram of the structure of the stepping mechanism involved in the embodiment of the present invention;

[0041] Figure 18 is a front view of the upper clamping assembly involved in an embodiment of the present invention;

[0042] Figure 19 is a side view of the upper clamping assembly involved in an embodiment of the present invention;

[0043] Figure 20 1 is a schematic structural diagram of a lower clamping assembly involved in an embodiment of the present invention;

[0044] Figure 21 1 is a schematic structural diagram of a stepper drive assembly involved in an embodiment of the present invention;

[0045] Figure 22 Schematic diagram of the structure of the cutting mechanism involved in the embodiment of the present invention;

[0046] Figure 23 It is a partial structural diagram of the cutting mechanism involved in the embodiment of the present invention.

[0047] In the picture:

[0048] 1. Pay-off mechanism; 11. Pay-off motor; 12. Pay-off turntable; 13. Wire guide; 14. Wire beam;

[0049] 2. Straightening mechanism; 21. Bottom chord straightening unit; 22. Web bar straightening unit;

[0050] 3. Bending mechanism; 311. Upper bending swing arm; 312. Lower bending swing arm; 313. Bending motor; 314. Small pulley; 315. Large pulley; 316. Synchronous belt; 317. Gear shaft; 318. Gear plate; 319. Swing link; 3110. Crank seat; 3111. Upper transmission link; 3112. Upper connecting arm; 3113. Upper rotating shaft; 3114. Lower transmission link; 3115. Lower connecting arm; 3116. Lower rotating shaft; 3117. Upper swing Arm locking plate; 3118, lower arm locking plate; 321, driving gear plate; 322, driven gear plate; 323, chain; 324, conveying pin; 325, driving gear shaft; 326, driven gear; 327, driving turntable shaft; 331, guide rail; 332, connecting seat block; 333, steel pipe conveying seat; 334, lower chord conveying seat; 335, pusher wheel; 336, one-way bearing; 337, pusher motor; 338, pusher swing arm; 339, pusher connecting rod;

[0051] 4. Welding mechanism; 41. Welding clamping assembly; 411. Clamping mounting plate; 412. Clamping cylinder; 413. Locking arm; 414. Clamping drive shaft; 415. Clamping claw; 416. Clamping seat; 42. Upper welding assembly; 421. Upper welding transformer; 422. Upper conductor; 423. Upper welding electrode; 424. Upper electrode tip; 425. Upper welding cylinder; 43. Lower welding assembly; 431. Lower welding transformer; 432. Lower conductor; 433. Lower welding electrode; 434. Lower movable electrode tip; 435. Lower welding cylinder; 436. Lower fixed electrode tip;

[0052] 5. Stepper mechanism; 51. Upper clamping assembly; 511. Upper clamping cylinder; 512. Upper clamping rack; 513. Upper clamping gear; 514. Upper clamping block; 5141. Clamping protrusion; 52. Lower clamping assembly; 521. Lower clamping cylinder; 522. Lower clamping arm; 523. Lower clamping movable block; 524. Lower clamping fixed block; 531. Stepper motor; 532. Driving pulley; 533. Driven pulley; 534. Transmission belt; 535. Moving screw; 5351. Screw slider; 54. Stepper base plate;

[0053] 6. Cutting mechanism; 61. Shearing motor; 62. Shearing crankshaft; 63. Shearing connecting rod; 64. Shearing swing arm; 65. Shearing knife;

[0054] 7. Material receiving rack; 8. Fixed bottom beam;

[0055] 101. Web rod reinforcement; 102. Steel pipe; 103. Bottom chord reinforcement. DETAILED DESCRIPTION

[0056] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only show portions relevant to the present invention, not all of them.

[0057] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0058] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0059] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0060] The present invention provides an automated steel tube truss production line for producing steel tube trusses. There are two common forms of steel tube trusses. One is a truss structure formed by welding bent web bars 101 on both sides of a steel tube 102. Figure 1 and 2 Another is to weld the bent web reinforcement 101 on both sides of the steel tube 102, and weld the lower chord reinforcement 103 at the lower end of the web reinforcement 101 to form a truss structure, such as Figure 3 and Figure 4 shown.

[0061] like Figure 5-Figure 23As shown, the automated steel pipe truss production line provided by the present invention includes a pay-out mechanism 1, a straightening mechanism 2, a bending mechanism 3, a welding mechanism 4, a stepping mechanism 5, a cutting mechanism 6 and a material receiving rack 7 arranged in sequence along a first direction, wherein the straightening mechanism 2, the bending mechanism 3, the welding mechanism 4, the stepping mechanism 5 and the cutting mechanism 6 are all arranged on a fixed bottom beam 8. There are four pay-off mechanisms 1, which are respectively used to place two coils of web bars 101 in a coiled state and two coils of lower chord bars 103 in a coiled state, and can rotate and release the web bars 101 and lower chord bars 103 in a coiled state; the straightening mechanism 2 is used to receive the web bars 101 and lower chord bars 103 released by the pay-off mechanism 1, and can straighten the web bars 101 and lower chord bars 103; the bending mechanism 3 is used to receive the web bars 101 and lower chord bars 103 delivered by the straightening mechanism 2 and the steel pipe 102 placed manually, and can bend the web bars 101 into a wavy shape, and can The truss 102 is capable of conveying the web reinforcement 101, the lower chord reinforcement 103 and the steel tube 102 backward; the welding mechanism 4 is used to receive the web reinforcement 101, the lower chord reinforcement 103 and the steel tube 102 conveyed by the bending mechanism 3, and is capable of welding the steel tube 102 to the crest of the web reinforcement 101 and welding the lower chord reinforcement 103 to the trough of the web reinforcement 101; the stepping mechanism 5 is used to convey the welded steel tube truss backward to a fixed length; the cutting mechanism 6 is used to cut the welded steel tube truss from the continuously conveyed web reinforcement 101 and the lower chord reinforcement 103; the material receiving rack 7 is used to hold the steel tube truss cut off by the cutting mechanism 6.

[0062] Specifically, if Figure 7 As shown, the pay-off mechanism 1 includes a pay-off turntable 12 and a pay-off motor 11. The web bar 101 and the bottom chord bar 103 in the form of a coil are wound on the pay-off turntable 12. The pay-off motor 11 is used to drive the pay-off turntable 12 to rotate to release the web bar 101 and the bottom chord bar 103. Preferably, the pay-off mechanism 1 also includes a wire guide 13 and a wire beam 14. The wire guide 13 and the wire beam 14 are used to guide the web bar 101 or the bottom chord bar 103 released from the pay-off turntable 12.

[0063] like Figure 8 As shown, the straightening mechanism 2 includes a group of web bar straightening parts 22 and two groups of lower chord bar straightening parts 21. The two web bars 101 are straightened and conveyed simultaneously by a group of web bar straightening parts 22, and the two lower chord bars 103 are straightened and conveyed separately by the two groups of lower chord bar straightening parts 21. The web bar straightening parts 22 and the lower chord bar straightening parts 21 each include two straightening plates perpendicular to each other, and two rows of rollers arranged at intervals are provided on the straightening plates. The web bars 101 and the lower chord bars 103 can pass between the two rows of rollers.

[0064] The bending mechanism 3 includes a web reinforcement bending assembly, a web reinforcement conveying assembly, and a lower chord reinforcement and steel pipe conveying assembly. The web reinforcement bending assembly is used to receive the two web reinforcements 101 conveyed by the straightening mechanism 2, and is used to simultaneously bend the two web reinforcements 101 into a wavy shape. The web reinforcement conveying assembly is used to convey the bent web reinforcement 101 backward. The lower chord reinforcement and steel pipe conveying assembly is used to receive the two lower chord reinforcements 103 conveyed by the straightening mechanism 2 and the steel pipe 102 placed manually, and is used to convey the lower chord reinforcement 103 and the steel pipe 102 backward.

[0065] like Figure 8 As shown, the web reinforcement bending assembly includes a bending drive assembly and an upper bending swing arm 311 and a lower bending swing arm 312 spaced apart in a direction perpendicular to the first direction. The bending drive assembly can drive the upper bending swing arm 311 and the lower bending swing arm 312 to swing to bend the two web reinforcements 101 delivered between the two bending swing arms. More specifically, as Figure 9As shown, the bending drive assembly includes a bending motor 313, a small pulley 314, a large pulley 315, a synchronous belt 316, a gear shaft 317, a gear plate 318, a swing link 319, a crank seat 3110, an upper transmission link 3111, an upper connecting arm 3112, an upper rotating shaft 3113, a lower transmission link 3114, a lower connecting arm 3115, a lower rotating shaft 3116, an upper swing arm locking plate 3117 and a lower swing arm locking plate 3118, the bending motor 313 is arranged on the mounting frame, the small pulley 314 is arranged on the output shaft of the bending motor 313, the large pulley 315 is rotatably arranged on the mounting frame, the synchronous belt 316 is sleeved on the small pulley 314 and the large pulley 315, the gear shaft 317 is arranged on the large pulley 315, the gear plate 318 is engaged with the gear shaft 317, and the crank seat 3110 is rotatably arranged on Mounting frame, one end of the swing link 319 is hinged to the gear plate 318, and the other end is hinged to the crank base 3110, one end of the upper transmission link 3111 is hinged to the upper end of the crank base 3110, and the other end is hinged to one end of the upper connecting arm 3112, the other end of the upper connecting arm 3112 is connected to the upper rotating shaft 3113, the upper rotating shaft 3113 is connected to the upper swing arm locking plate 3117, the upper swing arm locking plate 3117 is fixedly connected to the upper bending swing arm 311, the first end of the lower transmission link 3114 is hinged to the lower end of the crank base 3110, and the other end is hinged to one end of the lower connecting arm 3115, the other end of the lower connecting arm 3115 is connected to the lower rotating shaft 3116, the lower rotating shaft 3116 is connected to the lower swing arm locking plate 3118, and the lower swing arm locking plate 3118 is fixedly connected to the lower bending swing arm 312. The bending motor 313 drives the small pulley 314 and drives the large pulley 315 through the synchronous belt 316, so that the gear shaft 317 engages and rotates with the gear plate 318, and the gear plate 318 causes the crank seat 3110 to swing back and forth through the swing connecting rod 319; the lower transmission connecting rod 3114 drives the lower bending swing arm 312 fixed on the lower swing arm locking plate 3118 to swing up and down alternately through the lower connecting arm 3115 and the lower rotating shaft 3116, and the upper transmission connecting rod 3111 drives the upper bending swing arm 311 fixed on the upper swing arm locking plate 3117 to swing up and down alternately, so that the bending forming pins fixed on the upper bending swing arm 311 and the lower bending swing arm 312 bend the two web reinforcements 101 into a wavy shape.

[0066] like Figure 11 As shown, the web reinforcement conveying assembly includes a first conveying drive assembly, a driving gear plate 321, a driven gear plate 322, a chain 323 and a conveying pin 324. The axes of the driving gear plate 321 and the driven gear plate 322 are perpendicular to the first direction. The chain 323 is wound around the driving gear plate 321 and the driven gear plate 322. The first conveying drive assembly can drive the driving gear plate 321 to rotate. The conveying pin 324 is set on the chain 323. The conveying pin 324 can move the bent and formed part of the web reinforcement 101. More specifically, as shown in FIG. Figure 10 As shown, the first conveying drive assembly includes a driving gear shaft 325, a driven gear 326, and a driving turntable shaft 327. The driving gear shaft 325 is set on the gear plate 318. The driven gear 326 meshes with the driving gear shaft 325. The driving turntable shaft 327 is connected to the driven gear 326 via a locking plate. The driving gear plate 321 is connected to the driving gear plate shaft. The gear plate 318 drives the driving gear shaft 325 to rotate, and then the driven gear 326 meshes with the driving gear shaft 325 to rotate. The driving gear plate shaft rotates with the driven gear 326. The driving gear plate 321 is fixed to the driving gear plate shaft. As a result, the conveying pin 324 set on the chain 323 is driven by the driving gear plate 321, the driven gear plate 322 and the chain 323. It moves a certain distance with the wavy web reinforcement 101 and then separates. The web reinforcement 101 is pushed toward the welding mechanism 4.

[0067] like Figure 8 and Figure 12As shown, the lower chord rib and steel pipe conveying assembly includes a second conveying drive assembly, a guide rail 331, a connecting seat block 332, a steel pipe conveying seat 333 and a lower chord rib conveying seat 334. The guide rail 331 is distributed along the first direction, and the second conveying drive assembly can drive the connecting seat block 332 to move back and forth along the guide rail 331. A steel pipe conveying seat 333 and two lower chord rib conveying seats 334 are provided on the connecting seat block 332. The steel pipe conveying seat 333 is located above the lower chord rib conveying seat 334. The two lower chord rib conveying seats 334 are staggered in the horizontal direction. The steel pipe conveying seat 333 and the lower chord rib conveying seat 334 both include multiple rows of pushing wheel groups arranged along the first direction. The pushing wheel group includes two spaced apart pushing wheels 335. The pushing wheel 335 is installed on the pushing wheel shaft through a one-way bearing 336. The one-way bearing 336 is configured to make the pushing wheel 335 rotate unidirectionally from the bending mechanism 3 to the straightening mechanism 2. When the second conveying drive assembly drives the connecting seat block 332 to move from the straightening mechanism 2 to the bending mechanism 3, the pusher wheel 335 cannot rotate. The two pusher wheels 335 in the pusher wheel group can clamp the steel pipe 102 or the lower chord 103 and transport the steel pipe 102 or the lower chord 103 backward. When the second conveying drive assembly drives the connecting seat block 332 to move from the bending mechanism 3 to the straightening mechanism 2, the pusher wheel 335 can rotate and retract along the steel pipe 102 or the lower chord 103, and transport the steel pipe 102 and the lower chord 103 backward in this reciprocating manner. More specifically, the second conveying drive assembly includes a pusher motor 337, a pusher swing arm 338, and a pusher connecting rod 339. One end of the pusher swing arm 338 is connected to the output shaft of the pusher motor 337, the other end of the pusher swing arm 338 is hinged to one end of the pusher connecting rod 339, and the other end of the pusher connecting rod 339 is hinged to the connecting seat block 332. The pushing motor 337 drives the connecting seat block 332 to slide back and forth on the guide rail 331 through the pushing swing arm 338 and the pushing connecting rod 339, thereby completing the transportation of the lower chord 103 and the steel pipe 102 to the welding mechanism 4.

[0068] like Figure 13 As shown, the welding mechanism 4 includes a welding clamping assembly 41, an upper welding assembly 42 and a lower welding assembly 43 which are arranged in sequence. The welding clamping assembly 41 can respectively clamp the bent portions of the two web bars 101 to the two opposite sides of the clamping seat 416. The lower chord bar 103 and steel pipe 102 conveying assembly can convey the steel pipe 102 to the top of the bent portion of the two web bars 101, and can convey the two lower chord bars 103 to the bottom of the bent portion of the two web bars 101. The upper welding assembly 42 can weld the steel pipe 102 to the crests of the two web bars 101, and the lower welding assembly 43 can weld the lower chord bar 103 to the troughs of the corresponding web bars 101. More specifically, as shown in FIG. Figure 14As shown, the welding clamping assembly 41 includes a clamping mounting plate 411, a clamping cylinder 412, a locking arm 413, a clamping transmission shaft 414 and a clamping claw 415. The two clamping cylinders 412 are arranged on the clamping mounting plate 411. One end of the two locking arms 413 is hinged to the telescopic ends of the two clamping cylinders 412 in a one-to-one correspondence. The two clamping transmission shafts 414 are rotatably arranged on the clamping mounting plate 411. The two clamping transmission shafts 414 are connected to the two locking arms 413 in a one-to-one correspondence. The two clamping claws 415 are connected to the two clamping transmission shafts 414 in a one-to-one correspondence, and the two clamping claws 415 are respectively located on both sides of the clamping seat 416. Figure 15 As shown, the upper welding assembly 42 includes an upper welding transformer 421, two upper wires 422 connected to the upper welding transformer 421, two upper welding electrodes 423 connected to the two upper wires 422, two upper electrode heads 424 respectively provided on the two upper welding electrodes 423, and upper welding cylinders 425 respectively connected to the two upper welding electrodes 423. The two upper welding cylinders 425 respectively push a pair of upper welding electrodes 423 and upper electrode heads 424 assembled as one body, squeezing the wave crests of the steel pipe 102 and the wavy web reinforcement 101 together. The current output by the upper welding transformer 421 is transmitted through the upper wires 422 to weld the steel pipe 102 and the web reinforcement 101 together. Figure 16 As shown, the lower welding assembly 43 includes a lower welding transformer 431, two lower wires 432 connected to the lower welding transformer 431, two lower welding electrodes 433 respectively connected to the two lower wires 432, two lower movable electrode heads 434 respectively provided on the two lower welding electrodes 433, lower welding cylinders 435 respectively driven by the two lower welding electrodes 433, and two lower fixed electrode heads 436 corresponding one to the lower movable electrode heads 434. The two lower welding cylinders 435 respectively push a pair of integrated lower welding electrodes 433 and lower movable electrode heads 434 to cooperate with the lower fixed electrode heads 436 to squeeze the troughs of the lower chord 103 and the wavy web rib 101 together. The current output by the lower welding transformer 431 is transmitted through the lower wires 432 to weld the steel pipe 102 and the web rib 101 together.

[0069] like Figure 17 As shown, the stepping mechanism 5 includes a stepping drive assembly, a stepping base plate 54, an upper clamping assembly 51 and a lower clamping assembly 52. ​​The stepping drive assembly is used to drive the stepping base plate 54 to feed the steel pipe in a fixed length along the first direction. The upper clamping assembly 51 and the lower clamping assembly 52 are both arranged on the stepping base plate 54. The upper clamping assembly 51 is used to clamp the steel pipe 102 in the steel pipe truss, and the lower clamping assembly 52 can clamp the lower chord 103 in the steel pipe truss. More specifically, as shown in FIG. Figure 18 and Figure 19As shown, the upper clamping assembly 51 includes an upper clamping cylinder 511, an upper clamping rack 512, an upper clamping gear 513 and an upper clamping block 514. The upper clamping rack 512 is connected to the telescopic end of the upper clamping cylinder 511. The upper clamping rack 512 is provided with meshing teeth on two opposite sides. The two upper clamping gears 513 are respectively meshed with the two side surfaces of the upper clamping rack 512. The clamping block is connected to the upper clamping gear 513. The clamping block is provided with a clamping protrusion 5141. The clamping protrusions 5141 of the two clamping blocks cooperate to clamp the steel pipe 102 in the steel pipe truss. Figure 20 As shown, the lower clamping assembly 52 includes a lower clamping cylinder 521, a lower clamping arm 522, a lower clamping movable block 523 and a lower clamping fixed block 524. One end of the lower clamping arm 522 is hinged to the telescopic end of the lower clamping cylinder 521, and the lower clamping movable block 523 is set at the other end of the lower clamping arm 522. The lower clamping cylinder 521 can drive the lower clamping movable block 523 to cooperate with the lower clamping fixed block 524 to clamp the web reinforcement 101 or the lower chord reinforcement 103. There are two groups of lower clamping assemblies 52, and the two groups of lower clamping assemblies 52 are used to clamp two web reinforcements 101 or two lower chord reinforcements 103 respectively. Figure 21 As shown, the stepper drive assembly includes a stepper motor 531, a driving pulley 532, a driven pulley 533, a transmission belt 534 and a movable lead screw 535. The driving pulley 532 is arranged on the output shaft of the stepper motor 531, the transmission belt 534 is wound around the driving pulley 532 and the driven pulley 533, the movable lead screw 535 is connected to the driven pulley 533, and the stepper base 54 is connected to the lead screw slider 5351. After the upper clamping assembly 51 and the lower clamping assembly 52 complete the clamping, the stepper motor 531 drives the driving pulley 532, which is transmitted through the transmission belt 534, so that the driven pulley 533 and the movable lead screw 535 fixed together rotate, and the stepper base 54 is fixed on the lead screw slider 5351 and performs linear motion accordingly. After reaching the specified position, the above clamping actions are all released, the stepper motor 531 reverses, and the stepper base 54 retracts. This process is repeated to complete the process of sending the welded steel pipe truss products into the cutting device.

[0070] like Figure 22 and Figure 23 As shown, the cutting mechanism 6 includes a shearing motor 61, a shearing crankshaft 62, a shearing connecting rod 63, a shearing swing arm 64, and a shearing knife 65. The shearing motor 61 is driven by the shearing crankshaft 62. One end of each of the two shearing connecting rods 63 is hinged to the shearing crankshaft 62, and the other ends of the two shearing connecting rods 63 are respectively hinged to one end of the two shearing swing arms 64. The two shearing knives 65 are respectively arranged at the other ends of the two shearing swing arms 64, and the two shearing knives 65 are arranged opposite each other. The shearing motor 61 rotates the shearing crankshaft 62, which drives the shearing swing arm 64 through the shearing connecting rod 63, causing the shearing knife 65 fixed to the shearing swing arm 64 to cut the web reinforcement 101 or the bottom chord reinforcement 103 to a predetermined length.

[0071] The finished steel pipe trusses cut by the cutting mechanism 6 are placed on the receiving rack 7 manually or by a robot.

[0072] The automated steel tube truss production line provided by the present invention can produce both steel tube trusses without lower chords 103 and steel tube trusses with lower chords 103. When producing steel tube trusses without lower chords 103, there is no need to place lower chords 103 in the pay-out mechanism 1. In addition, operations related to the lower chords 103 in the straightening mechanism 2, the bending mechanism 3, the welding mechanism 4, the stepping mechanism 5 and the cutting mechanism 6 may not be performed.

[0073] The automated steel pipe truss production line provided by the present invention integrates feeding, straightening, bending, welding, length-fixed feeding and cutting, has a high degree of automation, and has a compact production line layout and high production efficiency.

[0074] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An automated steel pipe truss production line, characterized in that: The invention comprises a pay-off mechanism (1), a straightening mechanism (2), a bending mechanism (3), a welding mechanism (4), a stepping mechanism (5), a cutting mechanism (6), and a material receiving frame (7) which are sequentially arranged along a first direction, wherein the straightening mechanism (2), the bending mechanism (3), the welding mechanism (4), the stepping mechanism (5), and the cutting mechanism (6) are all arranged on a fixed bottom beam (8); The number of the pay-off mechanisms (1) is four, and the four pay-off mechanisms (1) are respectively used to place two coiled web reinforcements (101) and two coiled lower chord reinforcements (103), and are capable of rotating and releasing the coiled web reinforcements (101) and lower chord reinforcements (103). The straightening mechanism (2) is used to receive the web reinforcement (101) and the lower chord reinforcement (103) released by the pay-off mechanism (1), and is capable of straightening the web reinforcement (101) and the lower chord reinforcement (103); The bending mechanism (3) is used to receive the web reinforcement (101) and the lower chord reinforcement (103) conveyed by the straightening mechanism (2) and the steel pipe (102) placed manually, and is capable of bending the web reinforcement (101) into a wave shape, and is capable of conveying the web reinforcement (101), the lower chord reinforcement (103) and the steel pipe (102) backward; The welding mechanism (4) is used to receive the web reinforcement (101), the lower chord reinforcement (103) and the steel pipe (102) conveyed by the bending mechanism (3), and is capable of welding the steel pipe (102) to the wave crest of the web reinforcement (101) and welding the lower chord reinforcement (103) to the wave trough of the web reinforcement (101); The stepping mechanism (5) is used to transport the welded steel pipe truss backward to a fixed length; The cutting mechanism (6) is used to cut the welded steel tube truss from the continuously transported web reinforcement (101) and lower chord reinforcement (103); The material receiving rack (7) is used to hold the steel pipe trusses cut off by the cutting mechanism (6); The bending mechanism (3) comprises a web bar bending assembly, a web bar conveying assembly, and a lower chord bar and steel pipe conveying assembly. The web bar bending assembly is used to receive two web bars (101) conveyed by the straightening mechanism (2) and to simultaneously bend the two web bars (101) into a wave shape. The web bar conveying assembly is used to convey the bent web bars (101) backward. The lower chord bar and steel pipe conveying assembly is used to receive two lower chord bars (103) conveyed by the straightening mechanism (2) and a steel pipe (102) placed manually, and to convey the lower chord bar (103) and the steel pipe (102) backward. The web reinforcement bending assembly comprises a bending drive assembly and an upper bending swing arm (311) and a lower bending swing arm (312) spaced apart in a direction perpendicular to the first direction. The bending drive assembly is capable of driving the upper bending swing arm (311) and the lower bending swing arm (312) to swing so as to bend the web reinforcement (101) conveyed between the upper bending swing arm (311) and the lower bending swing arm (312).

2. The automated steel pipe truss production line according to claim 1, characterized in that: The pay-off mechanism (1) comprises a pay-off turntable (12) and a pay-off motor (11), wherein web reinforcement (101) and lower chord reinforcement (103) in the form of coils are wound around the pay-off turntable (12), and the pay-off motor (11) is used to drive the pay-off turntable (12) to rotate so as to release the web reinforcement (101) and lower chord reinforcement (103).

3. The automated steel pipe truss production line according to claim 1, characterized in that: The straightening mechanism (2) comprises a group of web bar straightening parts (22) and two groups of lower chord bar straightening parts (21); two web bars (101) are straightened and conveyed simultaneously by the group of web bar straightening parts (22); two lower chord bars (103) are straightened and conveyed respectively by the two groups of lower chord bar straightening parts (21); the web bar straightening parts (22) and the lower chord bar straightening parts (21) each comprise two straightening plates perpendicular to each other; two rows of rollers spaced apart are provided on the straightening plates; the web bars (101) and the lower chord bars (103) can pass between the two rows of rollers.

4. The automated steel pipe truss production line according to claim 1, characterized in that: The web rib conveying assembly comprises a first conveying drive assembly, a driving gear plate (321), a driven gear plate (322), a chain (323) and a conveying pin (324), wherein the axes of the driving gear plate (321) and the driven gear plate (322) are perpendicular to the first direction, the chain (323) is wound around the driving gear plate (321) and the driven gear plate (322), the first conveying drive assembly can drive the driving gear plate (321) to rotate, the conveying pin (324) is arranged on the chain (323), and the conveying pin (324) can move the bent and formed part of the web rib (101).

5. The automated steel pipe truss production line according to claim 1, characterized in that: The lower chord reinforcement and steel pipe conveying assembly comprises a second conveying drive assembly, a guide rail (331), a connecting seat block (332), a steel pipe conveying seat (333) and a lower chord reinforcement conveying seat (334), wherein the guide rail (331) is distributed along the first direction, and the second conveying drive assembly can drive the connecting seat block (332) to move back and forth along the guide rail (331), and the connecting seat block (332) is provided with one steel pipe conveying seat (333) and two lower chord reinforcement conveying seats (334), wherein the steel pipe conveying seat (333) is located at the lower chord reinforcement conveying seat (334). Above the lower chord rib conveying seat (334), the two lower chord rib conveying seats (334) are staggered in the horizontal direction. The steel pipe conveying seat (333) and the lower chord rib conveying seat (334) both include multiple rows of pusher wheel groups arranged along the first direction. The pusher wheel group includes two pusher wheels (335) arranged at intervals. The pusher wheel (335) is installed on the pusher wheel shaft through a one-way bearing (336). The one-way bearing (336) is configured to enable the pusher wheel (335) to rotate in one direction from the bending mechanism (3) to the straightening mechanism (2).

6. The automated steel pipe truss production line according to claim 1, characterized in that: The welding mechanism (4) comprises a welding clamping assembly (41), an upper welding assembly (42) and a lower welding assembly (43) which are arranged in sequence. The welding clamping assembly (41) can respectively clamp the bent portions of the two web bars (101) against the two opposite sides of the clamping seat (416). The lower chord bar and steel pipe conveying assembly can convey the steel pipe (102) to the top ends of the bent portions of the two web bars (101), and can respectively convey the two lower chord bars (103) to the bottom ends of the bent portions of the two web bars (101). The upper welding assembly (42) can weld the steel pipe (102) and the wave crests of the two web bars (101), and the lower welding assembly (43) can weld the lower chord bar (103) and the wave troughs of the corresponding web bars (101).

7. The automated steel pipe truss production line according to claim 1, characterized in that: The stepping mechanism (5) comprises a stepping drive assembly, a stepping base plate (54), an upper clamping assembly (51) and a lower clamping assembly (52); the stepping drive assembly is used to drive the stepping base plate (54) to perform fixed-length feeding along the first direction; the upper clamping assembly (51) and the lower clamping assembly (52) are both arranged on the stepping base plate (54); the upper clamping assembly (51) is used to clamp the steel pipe (102) in the steel pipe truss; and the lower clamping assembly (52) can clamp the lower chord (103) in the steel pipe truss.

8. The automated steel pipe truss production line according to claim 1, characterized in that: The shearing mechanism (6) comprises a shearing motor (61), a shearing crankshaft (62), a shearing connecting rod (63), a shearing swing arm (64) and a shearing knife (65). The shearing motor (61) is connected to the shearing crankshaft (62) by driving, one end of each of the two shearing connecting rods (63) is hinged to the shearing crankshaft (62), the other ends of the two shearing connecting rods (63) are respectively hinged to one end of the two shearing swing arms (64), and the two shearing knives (65) are respectively arranged at the other ends of the two shearing swing arms (64), and the two shearing knives (65) are arranged opposite to each other.

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