A precision servo bending drive device for steel pipe furniture

Abstract

The present invention discloses a precision servo bending drive device for steel pipe furniture, comprising a first bracket and a second bracket, wherein a bending mechanism is provided on the first bracket, and the bending mechanism comprises a fixed shaft and a rotating shaft, wherein both the fixed shaft and the rotating shaft pass through a cross plate and are welded to the cross plate, and the cross plate is fitted with a cross bar, wherein the bottom end of the fixed shaft passes through the cross bar and is movably connected to the cross bar bearing, and a first servo forward and reverse motor is bolted to the bottom end of the cross bar, and the output shaft of the first servo forward and reverse motor is keyed to the bottom end of the fixed shaft. The present invention is provided with a bending mechanism, a first clamping mechanism, a second clamping mechanism and a sand supply mechanism, and before bending, the steel pipe can be clamped and fixed by a fixing member and a clamping plate, and at the same time, the first clamping mechanism and the second clamping mechanism can move closer to each other and axially clamp the steel pipe, thereby ensuring that the steel pipe will not be displaced during the bending process, thereby ensuring the bending accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of steel tube furniture processing, and in particular to a precision servo bending drive device for steel tube furniture. Background Art

[0002] Steel pipe furniture is assembled by welding steel pipes. During the processing, the steel pipes need to be bent according to the shape of the furniture. Since the steel pipe is a hollow structure, the bend will be concave inward after being bent directly, affecting the quality of the bent steel pipe. In order to improve the bending effect, the existing technology is to fill the steel pipe with sand. In this way, when the steel pipe is bent, the steel pipe is in a solid state as a whole, the bend is more uniform, and the strength is high.

[0003] However, in order to prevent sand from leaking out, the current bending device requires manual sealing of both ends of the steel pipe. After bending, the seals need to be manually removed again and the sand needs to be discharged. The operation is relatively cumbersome, which greatly reduces the work efficiency, is not conducive to large-scale production, and cannot meet people's use needs. In view of the defects existing in the above existing technology, it is necessary to further improve it to make it more practical so as to meet actual usage. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] Therefore, the object of the present invention is to provide a precision servo bending drive device for steel pipe furniture, comprising a first bracket and a second bracket, wherein the first bracket is provided with a bending mechanism, and the bending mechanism includes a fixed shaft and a rotating shaft, wherein both the fixed shaft and the rotating shaft pass through a transverse plate and are welded to the transverse plate, and the transverse plate is fitted with a transverse bar, the bottom end of the fixed shaft passes through the transverse bar and is movably connected to the transverse bar bearing, and a first servo forward and reverse motor is bolted to the bottom end of the transverse bar, and the output shaft of the first servo forward and reverse motor is key-connected to the bottom end of the fixed shaft;

[0006] The transverse plate is connected to a first clamping mechanism via a connecting rod, and the first clamping mechanism includes a first hydraulic cylinder, the first hydraulic cylinder is bolted to a side of the connecting rod, and the piston rod end of the first hydraulic cylinder is welded to a first connecting block, and the first connecting block is welded to a second connecting block via a connecting pipe;

[0007] The second bracket is provided with a second clamping mechanism, and the second clamping mechanism includes a fixing cylinder, and the fixing cylinder is sleeved with a fixing sleeve;

[0008] A sand supply mechanism is provided between the first clamping mechanism and the second clamping mechanism, and the sand supply mechanism includes a sand collecting box, and a screw conveyor is provided on one side of the sand collecting box.

[0009] Furthermore, a fixing rod is welded between the side walls of the first bracket, and a fixing piece is welded on the fixing rod, and two fixing rods and fixing pieces are symmetrically arranged, the top wall of the fixing piece is bent downward to form a splint, and the inner walls on both sides of the fixing piece extend horizontally outward to form limit blocks distributed at equal intervals, and a bottom rod distributed at equal intervals is arranged between the two fixing pieces, the inner side surface of the splint is welded to the side wall of the fixing piece by a second elastic spring, the limit block is a rectangular block structure, and the two ends of the bottom rod extend horizontally outward to form rectangular sliding blocks, and the side wall of the fixing piece opposite to the sliding block is provided with a long strip of sliding groove, and the sliding block is inserted into the sliding groove.

[0010] Furthermore, a rotating rod is welded to both ends of the cross bar, and the rotating rod passes through the side wall of the first bracket and is movably connected to the bearing of the side wall of the first bracket. The second servo forward and reverse motor is bolted to the side wall of the first bracket, and the output shaft of the second servo forward and reverse motor is key-connected to the rotating rod.

[0011] Furthermore, a groove is formed on the top surface of one side of the cross bar extending vertically upward, and a wire threading tube welded to the bottom wall of the cross bar passes through, and a conductive metal sheet is fixedly bonded to the groove wall through a first fixing plate, and the groove and the conductive metal sheet are both arc-shaped, and the centers of the circles of the two are located on the axial center line of the fixed shaft.

[0012] Furthermore, a cavity is provided in the wall of the horizontal plate, and the bottom wall on one side of the horizontal plate is fixedly bonded to the metal contact through a second fixed plate. The fixed shaft and the rotating shaft are both hollow structures, and spiral electric heating wires are welded to the inner walls of both, and the electric heating wires are electrically connected to the metal contacts through wires. Two symmetrically distributed first through holes are provided on the wall of the fixed shaft, and a second through hole is provided on the wall of the rotating shaft, and the metal contact is fitted with the conductive metal sheet.

[0013] Furthermore, the first connecting block and the second connecting block are both hollow structures, the first connecting block is connected to the second connecting block through a connecting tube, the second connecting block is a rectangular structure, and the side that is not connected to the connecting tube is evenly provided with air vents, and a movable rod passes through the wall of the connecting tube, the first connecting block is disc-shaped, and its diameter is larger than the side length of the second connecting block, the bottom end of the movable rod is welded with a baffle, and the top end of the movable rod is covered with a fixing ring welded to it, and the movable rod between the fixing ring and the inner wall of the connecting tube is covered with a first elastic spring, and both ends of the first elastic spring are welded to the fixing ring and the inner wall of the connecting tube.

[0014] Furthermore, a fan is bolted to the connecting rod, and a strip-shaped through groove for a rubber hose to pass through is opened on the connecting rod. One end of the rubber hose is sealed and bonded to the air outlet of the fan, and the other end of the rubber hose is connected to the first connecting block and sealed and bonded.

[0015] Furthermore, a piston block is inserted into the fixed cylinder, and the third servo forward and reverse motor is fixed with bolts on the bottom of the fixed cylinder, and the fixed cylinder is welded and fixed to the second bracket, the outer wall of the piston block is seamlessly fitted with the inner wall of the fixed cylinder, and the piston block is welded to the piston rod of the second hydraulic cylinder, and the second hydraulic cylinder is bolted to the second bracket, and a vertical plate is welded to the bottom of the fixed cylinder, and the bottom surface of the fixed sleeve extends vertically downward to form a protrusion, and a screw rod movably connected to its bearing is passed through the vertical plate, one end of the screw rod is keyed to the output shaft of the third servo forward and reverse motor, and the other end of the screw rod passes through the protrusion and is threadedly connected to the protrusion.

[0016] Furthermore, a first material guide plate is welded to the wall of the sand collecting box, and a second material guide plate is welded to the bottom end of the first material guide plate and the inner wall of the sand collecting box. The first material guide plate and the second material guide plate are both inclined, and a sand outlet hole is provided in the wall of the sand collecting box at the bottom end of the second material guide plate. A sand collecting hopper is welded to the outer wall of the sand collecting box directly below the sand outlet hole, and the bottom end of the sand collecting hopper is welded to and communicated with the outer shell on the screw conveyor, and the outer shell on the screw conveyor is welded to and communicated with the fixed cylinder through a connecting pipe.

[0017] Furthermore, the cross section of the fixed tube is a rectangular structure with both ends being open, and the outer wall of the fixed tube fits in with the inner wall of the fixed sleeve, and the fixed tube and the second connecting block are aligned, and the side lengths of the second connecting block and the outer wall of the fixed tube are the same.

[0018] The invention provides a precise servo bending drive device for steel pipe furniture, which has the following beneficial effects:

[0019] The present invention is provided with a bending mechanism, a first clamping mechanism, a second clamping mechanism and a sand supply mechanism. Before bending, the steel pipe can be clamped and fixed by the fixing member and the clamping plate. At the same time, the first clamping mechanism and the second clamping mechanism can move closer to each other and axially clamp the steel pipe, thereby ensuring that the steel pipe will not be displaced during the bending process, thereby ensuring the bending accuracy.

[0020] At the same time, during the clamping process, the second clamping mechanism can continuously transport the sand transported by the sand supply mechanism into the steel pipe until the sand fills the inside of the steel pipe, which can realize automatic sand filling, and the first clamping mechanism and the second clamping mechanism can clamp both ends of the steel pipe at the same time to prevent sand from leaking out, thereby ensuring the quality of the subsequent bending. The sand filling operation and the clamping operation can be carried out simultaneously, which can simplify the operation steps;

[0021] At the same time, after bending the steel pipe, the bending mechanism can drive it to flip, so that the steel pipe is in an inclined state. In this way, the sand in the steel pipe can automatically fall out under the action of gravity, which is convenient for automatic sand discharge, effectively improving work efficiency, and no manual access is required, the labor cost is low, and it is conducive to large-scale production and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which

[0023] Figure 1 It is a schematic diagram of the top view of the structure of the present invention;

[0024] Figure 2 It is a side view structural diagram of the first bracket and crossbar of the present invention;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the first connecting block, the connecting pipe and the second connecting block of the present invention;

[0026] Figure 4 This is a schematic cross-sectional view of the first connecting block, the connecting pipe, and the second connecting block of the present invention;

[0027] Figure 5 It is a schematic diagram of the longitudinal cross-section structure of the fixing member of the present invention;

[0028] Figure 6 This is a schematic diagram of the explosion structure of the fixed cylinder and the fixed sleeve of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the sand collecting box and the screw conveyor of the present invention;

[0030] Figure 8 This is a schematic diagram of the internal structure of the sand collecting box of the present invention;

[0031] Figure 9 It is a schematic diagram of the longitudinal cross-section structure of the horizontal plate, fixed shaft and rotating shaft of the present invention;

[0032] Figure 10 This is a schematic diagram of the cross-sectional structure of the horizontal plate, fixed shaft and rotating shaft in a top view of the present invention;

[0033] Figure 11 It is a schematic diagram of the three-dimensional structure of the cross bar and the conductive metal sheet of the present invention.

[0034] In the figure: 1. First bracket; 2. Second bracket; 3. Crossbar; 4. Rotating rod; 5. First servo forward and reverse motor; 6. Second servo forward and reverse motor; 7. Cross plate; 8. Fixed shaft; 9. Rotating shaft; 10. Connecting rod; 11. First hydraulic cylinder; 12. Fan; 13. First connecting block; 14. Connecting pipe; 15. Second connecting block; 16. Air outlet; 17. Baffle; 18. Movable rod; 19. First elastic spring; 20. Rubber hose; 21. Fixed rod; 22. Fixing piece; 23. Clamping plate; 24. Second elastic spring; 25. Fixing cylinder; 26. Second hydraulic cylinder; 27. Piston block; 28. Fixed sleeve; 29. Third servo forward and reverse motor; 30. Vertical plate; 31. Screw rod; 32. Bump; 33. Sand collecting box; 34. First guide plate; 35. Second guide plate; 36. Sand outlet hole; 37. Sand collecting hopper; 38. Screw conveyor; 39. Connecting pipe; 40. Electric heating wire; 41. First through hole; 42. Second through hole; 43. Cavity; 44. Metal contact; 45. Groove; 46. Conductive metal sheet; 47. Threading tube; 48. Limit block; 49. Bottom rod; 50. Sliding block. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0037] See also Figure 1-11The present invention provides a technical solution: a precision servo bending drive device for steel pipe furniture, comprising a first bracket 1 and a second bracket 2, a bending mechanism being provided on the first bracket 1, and the bending mechanism comprising a fixed shaft 8 and a rotating shaft 9, both of which pass through the cross plate 7 and are welded to the cross plate 7, and the cross plate 7 is fitted with the cross bar 3, the bottom end of the fixed shaft 8 passes through the cross bar 3 and is movably connected to the cross bar 3 bearing, and the bottom end of the cross bar 3 is bolted with a first servo forward and reverse motor 5, the output shaft of the first servo forward and reverse motor 5 is key-connected with the bottom end of the fixed shaft 8, the cross plate 7 is connected to a first clamping mechanism through a connecting rod 10, and the first clamping mechanism comprises a first hydraulic cylinder 11, the first hydraulic cylinder 11 is bolted to the side of the connecting rod 10, and the piston rod end of the first hydraulic cylinder 11 is welded to a first connecting block 13, the first connecting block 13 is welded to a second connecting block 15 through a connecting pipe 14, and the second bracket 2 is provided with a first Two clamping mechanisms, and the second clamping mechanism includes a fixed cylinder 25, and a fixed sleeve 28 is sleeved on the fixed cylinder 25. A sand supply mechanism is arranged between the first clamping mechanism and the second clamping mechanism, and the sand supply mechanism includes a sand collecting box 33, and a screw conveyor 38 is arranged on one side of the sand collecting box 33. During operation, the steel pipe is placed between the fixed shaft 8 and the rotating shaft 9, and then the steel pipe is fixed by the first clamping mechanism and the second clamping mechanism. While fixing, the steel pipe can be filled with sand through the sand collecting box 33. After the sand filling is completed, the first servo forward and reverse motor 5 is connected to the power supply and driven to run. The first servo forward and reverse motor 5 can drive the fixed shaft 8 to rotate axially on the cross bar 3, and the fixed shaft 8 drives the rotating shaft 9 to rotate through the cross plate 7. When the rotating shaft 9 makes a circular motion around the fixed shaft 8, the bending operation of the steel pipe can be completed. After the bending operation is completed, the first clamping mechanism and the second clamping mechanism are driven to reset, and the bent steel pipe can be taken out.

[0038] Both ends of the cross bar 3 are welded with a rotating rod 4, and the rotating rod 4 passes through the side wall of the first bracket 1 and is movably connected to the side wall bearing of the first bracket 1. The side wall of the first bracket 1 is bolted with a second servo forward and reverse motor 6, and the output shaft of the second servo forward and reverse motor 6 is key-connected with the rotating rod 4. After the second servo forward and reverse motor 6 is connected to the power supply and driven to run, it can drive the rotating rod 4 to rotate axially on the first bracket 1, and the rotating rod 4 can drive the bending mechanism to rotate through the cross bar 3.

[0039] A fixing rod 21 is welded between the side walls of the first bracket 1, and a fixing piece 22 is welded on the fixing rod 21, and two fixing rods 21 and fixing pieces 22 are symmetrically arranged. The top wall of the fixing piece 22 is bent downward to form a splint 23, and the inner walls on both sides of the fixing piece 22 extend horizontally outward to form limit blocks 48 distributed at equal intervals, and a bottom rod 49 distributed at equal intervals is provided between the two fixing pieces 22. The inner side of the splint 23 is welded to the side wall of the fixing piece 22 through a second elastic spring 24. The limit block 48 is a rectangular block structure, and the two ends of the bottom rod 49 extend horizontally outward to form a rectangular sliding block 50, and the side wall of the fixing piece 22 opposite to the sliding block 50 is provided with a long strip sliding groove, and the sliding block 50 is inserted into the sliding groove. When the steel pipe is bent, the steel pipe is first placed into the fixed axis 8 and The steel pipe is then pressed between the rotating shafts 9 and between the two fixing parts 22. The steel pipe can be supported by the bottom rod 49. During the pressing process, the steel pipe will squeeze the splint 23. The splint 23 will be squeezed and the second elastic spring 24 will be compressed. Under the elastic force of the second elastic spring 24, a reaction force will be applied to the steel pipe through the splint 23, and then the steel pipe can be clamped through the splint 23. In conjunction with the first clamping mechanism and the second clamping mechanism, it can be ensured that the steel pipe will not deviate during bending, thereby ensuring the bending accuracy. Since the sliding block 50 can slide in the sliding groove, the bottom rod 49 can move horizontally between the two fixing parts 22. In this way, when the bending mechanism drives the steel pipe to flip, the bottom rod 49 will move with the flipping of the steel pipe, thereby not hindering the flipping of the steel pipe, and the structure is reasonable.

[0040] The top surface of one side of the cross bar 3 extends vertically upward to form a groove 45, and the bottom wall of the cross bar 3 is penetrated by a wire threading tube 47 welded to it. A conductive metal sheet 46 is fixedly bonded to the wall of the groove 45 through a first fixing piece, and the groove 45 and the conductive metal sheet 46 are both arc-shaped, and the centers of the circles of both are located on the axial center line of the fixed shaft 8. A cavity 43 is opened in the wall of the cross plate 7, and the bottom wall of one side of the cross plate 7 is fixedly bonded to the metal contact 44 through a second fixing piece. The fixed shaft 8 and the rotating shaft 9 are both hollow structures, and the inner walls of both are welded with a spiral electric heating wire 40, and the electric heating wire 40 is electrically connected to the metal contact 44 through a wire. Two symmetrically distributed first through holes 41 are opened on the wall of the fixed shaft 8, and a second through hole 42 is opened on the wall of the rotating shaft 9. The metal contact 44 is in contact with the conductive metal sheet 46. The first through hole 41 and the second through hole 42 are used for the wire to pass through, which is convenient for the wire to connect the electric heating wire 40 and the metal The contact 44 is connected with the wires, and the wire threading tube 47 is also used for the wire to be inserted, so that the conductive metal sheet 46 can be connected to the external power grid through the wire. The first fixing plate and the second fixing plate are made of bakelite, which prevents the current flowing on the metal contact 44 and the conductive metal sheet 46 from being conducted to the cross bar 3 and the cross plate 7, preventing electric shock and improving the overall safety. At the same time, the first fixing plate and the second fixing plate are provided with threading holes, which are convenient for the wire to be soldered and fixed to the metal contact 44 and the conductive metal sheet 46. When the metal contact 44 and the conductive metal sheet 46 are in contact, the metal contact 44, the conductive metal sheet 46 and the electric heating wire 40 form a loop structure through the wire. When the current passes through the electric heating wire 40, heat is generated, and then the heat is transferred to the fixed shaft 8 and the rotating shaft 9. The fixed shaft 8 and the rotating shaft 9 can heat the bending part of the steel pipe before bending the steel pipe. The strength of the bent steel pipe can be improved by the hot bending processing method.

[0041] The first connecting block 13 and the second connecting block 15 are both hollow structures. The first connecting block 13 is connected to the second connecting block 15 through a connecting tube 14. The second connecting block 15 is a rectangular structure, and the side not connected to the connecting tube 14 is evenly provided with air outlet holes 16, and a movable rod 18 is passed through the wall of the connecting tube 14. The first connecting block 13 is disc-shaped, and its diameter is greater than the side length of the second connecting block 15. The bottom end of the movable rod 18 is welded with a baffle 17, and the top end of the movable rod 18 is sleeved with a fixing ring welded thereto, and the movable rod 18 between the fixing ring and the inner wall of the connecting tube 14 is sleeved with a first elastic spring 19, and the first elastic spring 19 is sleeved on both sides. The ends are welded to the fixing ring and the inner wall of the connecting pipe 14. The fan 12 is fixed with bolts on the connecting rod 10, and a strip-shaped through groove for the rubber hose 20 to penetrate is opened on the connecting rod 10. One end of the rubber hose 20 is sealed and bonded to the air outlet of the fan 12, and the other end of the rubber hose 20 is connected to the first connecting block 13 and sealed and bonded. When the steel pipe is placed between the fixing parts 22, the first hydraulic cylinder 11 can be powered on and driven to run. The first hydraulic cylinder 11 drives the second connecting block 15 to move through the first connecting block 13 and the connecting pipe 14. At this time, the second connecting block 15 can be inserted into the steel pipe until the first connecting block 13 and the end of the steel pipe are connected. When the bending mechanism drives the steel pipe to turn over, part of the sand in the steel pipe will automatically fall out under the action of gravity, but the sand at the bend of the steel pipe is not easy to fall out. At this time, the first hydraulic cylinder 11 drives the first connecting block 13 and the second connecting block 15 to reset. Under the elastic force of the first elastic spring 19, the baffle 17 is restored through the movable rod 18. The air outlet 16 can be exposed, and then the fan 12 can be connected to the power supply and driven to run. The fan 12 can suck in the outside air and send it into the first connecting block 13 through the rubber hose 20. The air enters the second connecting block 15 through the connecting pipe 14 and is ejected through the air outlet 16. The sand at the bend of the steel pipe can be blown out by the air flow pressure, which is convenient for sand discharge. The baffle 17 is set so that after the steel pipe is filled with sand, the baffle 17 will first contact with the sand and fit with the second connecting block 15 under the pressure of the sand, so that the air outlet 16 can be blocked to prevent the sand from blocking the air outlet 16 and ensure smooth airflow.

[0042] A piston block 27 is inserted into the fixed cylinder 25, and the third servo forward and reverse motor 29 is fixed to the bottom of the fixed cylinder 25 with bolts, and the fixed cylinder 25 is welded and fixed to the second bracket 2, the outer wall of the piston block 27 is seamlessly fitted with the inner wall of the fixed cylinder 25, and the piston block 27 is welded to the piston rod of the second hydraulic cylinder 26, and the second hydraulic cylinder 26 is bolted to the second bracket 2, and a vertical plate 30 is welded to the bottom of the fixed cylinder 25, and a convex block 32 is formed on the bottom of the fixed sleeve 28. A screw rod 31 movably connected to its bearing is passed through the vertical plate 30, one end of the screw rod 31 is keyed to the output shaft of the third servo forward and reverse motor 29, and the other end of the screw rod 31 passes through the convex block 32 and is threadedly connected to the convex block 32, and the sand collecting box 33 is welded to the wall. A first material guide plate 34 is connected, and a second material guide plate 35 is welded between the bottom end of the first material guide plate 34 and the inner wall of the sand collecting box 33. The first material guide plate 34 and the second material guide plate 35 are both inclined, and a sand discharge hole 36 is opened on the wall of the sand collecting box 33 at the bottom end of the second material guide plate 35. A sand collecting bucket 37 is welded to the outer wall of the sand collecting box 33 just below the sand discharge hole 36. The bottom end of the sand collecting bucket 37 is welded and connected to the outer shell of the screw conveyor 38, and the outer shell of the screw conveyor 38 is welded and connected to the fixed cylinder 25 through a connecting pipe 39. When fixing the steel pipe, one end of the steel pipe is first fixed by the first clamping mechanism, and then the third servo forward and reverse motor 29 is powered on and driven to operate, and the third servo forward and reverse motor 29 drives the screw rod The cam 32 is moved horizontally along with the rotation of the screw rod 31, and the fixed sleeve 28 can move synchronously with the cam 32 and be sleeved on the other end of the steel pipe to complete the fixation of the steel pipe. Then, a proper amount of sand can be poured into the sand collecting box 33, and the sand can slide into the second guide plate 35 through the first guide plate 34, slide downward along the second guide plate 35, and finally fall into the sand collecting hopper 37 through the sand outlet hole 36. The sand collecting hopper 37 transports the sand to the screw conveyor 38. When the spiral blades in the screw conveyor 38 rotate, the sand can be driven to move upward. When the sand moves to the connecting pipe 39, it will fall into the fixed The second hydraulic cylinder 26 can drive the piston block 27 to move inside the fixed cylinder 25 through the piston rod, and the piston block 27 can push the sand in the fixed cylinder 25 into the steel pipe. The reciprocating movement of the piston block 27 can fill the steel pipe with sand. Finally, the piston block 27 is inserted into the steel pipe and holds the sand to ensure that the sand will not be loose, ensuring that the steel pipe is evenly bent and there will be no wrinkles or depressions at the bends. The entire sand filling operation and steel pipe fixing operation can be carried out simultaneously, which is conducive to improving work efficiency. At the same time, when the bending mechanism drives the steel pipe to flip, the sand in the steel pipe will fall into the sand collecting box 33 again, so that sand filling and sand discharge can be cyclically carried out, and the operation is convenient.

[0043] The cross section of the fixing tube 25 is a rectangular structure, both ends of which are open, and the outer wall of the fixing tube 25 fits the inner wall of the fixing sleeve 28, and the fixing tube 25 is aligned with the second connecting block 15. The outer wall side lengths of the second connecting block 15 and the fixing tube 25 are consistent, and the outer wall side lengths of the two are consistent with the inner wall side lengths of the steel pipe. When fixing the steel pipe, the steel pipe, the second connecting block 15 and the fixing tube 25 are in a straight line. In this way, the second connecting block 15 is inserted into one end of the steel pipe, and the fixing sleeve 28 is sleeved on the other end of the steel pipe, The steel pipe is fixed to prevent it from moving. At the same time, when it is fixed, both ends of the steel pipe are blocked by the second connecting block 15 and the piston block 27. This not only ensures that the sand in the steel pipe is more compact and not loose, but also prevents sand from leaking out, and has a good use effect. At the same time, the fixed cylinder 25 and the opposite end of the steel pipe do not contact, and there is a certain distance between them. In this way, when the fixed sleeve 28 is removed from one end of the steel pipe, the steel pipe will not collide with the fixed cylinder 25 during the flipping process of the bending mechanism, ensuring that the sand discharge operation is carried out normally.

[0044] In this specification, terms such as "connect," "install," and "fix" should be understood broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a direct connection or an indirect connection through an intermediary. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0045] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A precision servo bending drive device for steel pipe furniture, comprising a first bracket (1) and a second bracket (2), characterized in that: The first bracket (1) is provided with a bending mechanism, and the bending mechanism includes a fixed shaft (8) and a rotating shaft (9), the fixed shaft (8) and the rotating shaft (9) both pass through the horizontal plate (7) and are welded to the horizontal plate (7), and the horizontal plate (7) is fitted with the horizontal bar (3), the bottom end of the fixed shaft (8) passes through the horizontal bar (3) and is movably connected to the bearing of the horizontal bar (3), and the bottom end of the horizontal bar (3) is bolted with a first servo forward and reverse motor (5), and the output shaft of the first servo forward and reverse motor (5) is key-connected to the bottom end of the fixed shaft (8); The transverse plate (7) is connected to a first clamping mechanism via a connecting rod (10), and the first clamping mechanism includes a first hydraulic cylinder (11), the first hydraulic cylinder (11) is bolted to a side surface of the connecting rod (10), and a piston rod end of the first hydraulic cylinder (11) is welded to a first connecting block (13), and the first connecting block (13) is welded to a second connecting block (15) via a connecting pipe (14); A second clamping mechanism is provided on the second bracket (2), and the second clamping mechanism includes a fixing cylinder (25), and a fixing sleeve (28) is sleeved on the fixing cylinder (25); A sand supply mechanism is provided between the first clamping mechanism and the second clamping mechanism, and the sand supply mechanism includes a sand collecting box (33). A screw conveyor (38) is provided on one side of the sand collecting box (33). A fixing rod (21) is welded between the side walls of the first bracket (1), and a fixing member (22) is welded on the fixing rod (21), and two fixing rods (21) and two fixing members (22) are symmetrically arranged. The top wall of the fixing member (22) is bent downward to form a clamping plate (23), and the inner walls on both sides of the fixing member (22) extend horizontally outward to form limit blocks (48) distributed at equal intervals, and a bottom rod (49) distributed at equal intervals is arranged between the two fixing members (22). The inner side surface of the clamping plate (23) is welded to the side wall of the fixing member (22) through a second elastic spring (24). The limit block (48) is a rectangular block structure. Both ends of the bottom rod (49) extend horizontally outward to form a rectangular sliding block (50), and the side wall of the fixing member (22) opposite to the sliding block (50) is provided with a long strip sliding groove, and the sliding block (50) is inserted into the sliding groove. Both ends of the crossbar (3) are welded with a rotating rod (4), and the rotating rod (4) passes through the side wall of the first bracket (1) and is movably connected to the bearing of the side wall of the first bracket (1). The side wall of the first bracket (1) is bolted with a second servo forward and reverse motor (6), and the output shaft of the second servo forward and reverse motor (6) is key-connected with the rotating rod (4). The first connecting block (13) and the second connecting block (15) are both hollow structures. The first connecting block (13) is connected to the second connecting block (15) through a connecting tube (14). The second connecting block (15) is rectangular in structure, and a side thereof not connected to the connecting tube (14) is evenly provided with air outlet holes (16), and a movable rod (18) is passed through the wall of the connecting tube (14). The first connecting block (13) is disc-shaped, and its diameter is larger than the side length of the second connecting block (15). The bottom end of the movable rod (18) is welded with a baffle (17), and the top end of the movable rod (18) is covered with a fixed ring welded to it, and a first elastic spring (19) is covered on the movable rod (18) between the fixed ring and the inner wall of the connecting tube (14). Both ends of the first elastic spring (19) are welded to the fixed ring and the inner wall of the connecting tube (14). The fan (12) is bolted to the connecting rod (10), and a strip-shaped through groove for the rubber hose (20) to pass through is provided on the connecting rod (10). One end of the rubber hose (20) is sealed and bonded to the air outlet of the fan (12), and the other end of the rubber hose (20) is connected to the first connecting block (13) and is sealed and bonded.

2. The precision servo bending drive device for steel pipe furniture according to claim 1, characterized in that: A groove (45) is formed on the top surface of one side of the cross bar (3) extending vertically upward, and a threading tube (47) is passed through the bottom wall of the cross bar (3) and is welded to the bottom wall of the cross bar (3). A conductive metal sheet (46) is fixedly bonded to the groove wall of the groove (45) via a first fixing sheet, and both the groove (45) and the conductive metal sheet (46) are in an arc shape, and the centers of the circles of the two are located on the axis of the fixed shaft (8).

3. The precision servo bending drive device for steel pipe furniture according to claim 2, characterized in that: A cavity (43) is provided in the wall of the horizontal plate (7), and the bottom wall of one side of the horizontal plate (7) is fixedly bonded to the metal contact (44) through a second fixing plate. The fixed shaft (8) and the rotating shaft (9) are both hollow structures, and a spiral electric heating wire (40) is welded and connected to the inner wall of both, and the electric heating wire (40) is electrically connected to the metal contact (44) through a wire. Two symmetrically distributed first through holes (41) are provided on the wall of the fixed shaft (8), and a second through hole (42) is provided on the wall of the rotating shaft (9). The metal contact (44) is in contact with the conductive metal sheet (46).

4. The precision servo bending drive device for steel pipe furniture according to claim 1, characterized in that: A piston block (27) is inserted into the interior of the fixed cylinder (25), and a third servo forward and reverse motor (29) is fixed to the bottom surface of the fixed cylinder (25) by bolts, and the fixed cylinder (25) is welded and fixed to the second bracket (2), the outer wall of the piston block (27) is seamlessly fitted with the inner wall of the fixed cylinder (25), and the piston block (27) is welded and connected to the piston rod of the second hydraulic cylinder (26), and the second hydraulic cylinder (26) is bolted and fixed to the second bracket (2), the bottom surface of the fixed cylinder (25) is welded and connected to a vertical plate (30), the bottom surface of the fixed sleeve (28) extends vertically downward to form a convex block (32), and a screw rod (31) movably connected to its bearing passes through the vertical plate (30), one end of the screw rod (31) is key-connected to the output shaft of the third servo forward and reverse motor (29), and the other end of the screw rod (31) passes through the convex block (32) and is threadedly connected to the convex block (32).

5. The precision servo bending drive device for steel pipe furniture according to claim 4, characterized in that: A first material guide plate (34) is welded to the wall of the sand collecting box (33), and a second material guide plate (35) is welded between the bottom end of the first material guide plate (34) and the inner wall of the sand collecting box (33). The first material guide plate (34) and the second material guide plate (35) are both inclined, and a sand outlet hole (36) is opened in the wall of the sand collecting box (33) at the bottom end of the second material guide plate (35). A sand collecting hopper (37) is welded to the outer wall of the sand collecting box (33) directly below the sand outlet hole (36). The bottom end of the sand collecting hopper (37) is welded to and communicated with the outer shell of the screw conveyor (38), and the outer shell of the screw conveyor (38) is welded to and communicated with the fixed cylinder (25) through a connecting pipe (39).

6. The precision servo bending drive device for steel pipe furniture according to claim 1, characterized in that: The fixed cylinder (25) has a rectangular cross-section with both ends being open. The outer wall of the fixed cylinder (25) fits in contact with the inner wall of the fixed sleeve (28). The fixed cylinder (25) and the second connecting block (15) are aligned with each other, and the side lengths of the outer walls of the second connecting block (15) and the fixed cylinder (25) are the same.

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