Automatic pre-bending mechanism for large-size round steel

Abstract

The application discloses a large-specification round steel automatic pre-bending mechanism and relates to the technical field of metal processing equipment. The mechanism comprises a support, a fixing frame rotatably connected to the support, a feeding part, a pre-bending part and a protection part arranged on the fixing frame, and a winding part arranged on the support. The pre-bending part comprises a pre-bending frame fixedly connected to the fixing frame, a fixed wheel rotatably connected to the pre-bending frame, and two moving blocks slidably connected to the pre-bending frame. The two moving blocks are rotatably connected with driving wheels, and the two driving wheels are driven by servo motors. A screw rod is arranged on the moving block, two adjusting motors are arranged on the pre-bending frame, and the output ends of the adjusting motors are connected with the screw rod through a commutator. The large-specification round steel automatic pre-bending mechanism can accurately and controllably pre-bend round steel with a diameter of 40 mm or below, and can also pre-bend the same round steel into steel with different radii, thereby having wide applicability.

Description

Technical Field

[0001] This invention relates to the field of metal processing equipment technology, and in particular to an automatic pre-bending mechanism for large-size round steel bars. Background Technology

[0002] Most existing round steel pre-bending devices have three wheels arranged in a triangle. The round steel passes through the gaps between the three wheels, and by adjusting the relative positions of the wheels, the round steel is bent into a certain arc. The drive method is mostly single-motor driven. One type has only one fixed-position driving wheel and two adjustable-position driven wheels, but these are not powered. Another structure uses gear transmission to power two pressure rollers, but these are also fixed-position, with only one adjustable-position driven wheel. Adjustment is always done manually, which is cumbersome.

[0003] The structure has only one driving wheel in a fixed position. Because all three pressure rollers are smooth, they are prone to slippage. Relative movement occurs between the rollers and the round steel, and prolonged friction can easily damage the rollers and the round steel. The driven wheel is manually adjusted, and the arc size cannot be adjusted arbitrarily during operation.

[0004] There is a structure with two power wheels in fixed positions. Since only one of the three pressure wheels can be adjusted, multiple adjustments are required to obtain the desired arc. Moreover, manual adjustment is time-consuming and laborious, and the size of the arc cannot be adjusted arbitrarily during operation.

[0005] A utility model patent with publication number CN208583925U discloses a rebar pre-bending device, belonging to the field of building engineering technology. It includes a support frame for supporting the entire device. One end of the top of the support frame is provided with a pressure rod for applying force to the end of the pre-bent rebar, and the other end is provided with a bracket for supporting the rebar during pre-bending. The pressure rod is movably connected to the support frame. The middle of the support frame is provided with an adjusting rod for adjusting the pre-bending length of the rebar. The adjusting rod is located above the pre-bent rebar, and both ends of the adjusting rod are movably connected to the support frame. The middle of the support frame in the width direction is provided with a gap for the rebar to pass through.

[0006] The above technical solution provides a rebar pre-bending device. The rebar to be pre-bent is inserted into the gap in the middle of a support frame, and the portion to be pre-bent is overlapped onto a pressure bar located at one end of the support frame. Pressing down the pressure bar utilizes the lever principle to lift the end of the rebar. The contact point between the rebar and the adjusting rod in the middle of the support frame is the bending point of the rebar pre-bending. The pre-bending length can be adjusted by moving the adjusting rod. However, it cannot precisely and controllably complete the pre-bending work for round steel with a diameter of 40mm or more. Summary of the Invention

[0007] To address the aforementioned technical problems, the purpose of this invention is to provide an automatic pre-bending mechanism for large-diameter round steel bars. By setting a pre-bending section, it can accurately and controllably pre-bend round steel bars with a diameter of less than 40mm, and can also pre-bend the same round steel bar into steel bars with different curvatures, thus having wide applicability.

[0008] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0009] An automatic pre-bending mechanism for large-size round steel bars includes a support frame and a fixed frame rotatably connected to the support frame. The fixed frame is provided with a feeding section, a pre-bending section, and a protective section. The support frame is provided with a winding section. The pre-bending section includes a pre-bending frame fixedly connected to the fixed frame. Fixed wheels are rotatably connected to the pre-bending frame. Two moving blocks are slidably connected to the pre-bending frame. Each of the two moving blocks is rotatably connected with a drive wheel. Both drive wheels are driven by a servo motor. A lead screw is provided on the moving blocks. Two adjusting motors are provided on the pre-bending frame. The output end of the adjusting motor is connected to the lead screw through a commutator.

[0010] The present invention is further configured such that: a bearing seat is provided on the fixed frame, a rotating bearing is provided on the bracket, the fixed frame and the bracket are rotatably connected by the bearing, a pin is provided on the fixed frame, and a plurality of insertion holes are provided on the bracket.

[0011] The present invention is further configured such that the servo motor is connected to the drive wheel via a planetary reducer.

[0012] The present invention is further configured such that: the feeding part includes a feeding rack disposed on the fixed frame, the feeding rack is provided with a feeding hole, and a cleaning ring is disposed in the feeding hole.

[0013] The present invention is further configured such that: the protective part includes a protective frame disposed on the fixed frame, a protective hose is connected to the protective frame, and an elastic plate is disposed on one side of the protective hose on the protective frame.

[0014] The present invention is further configured such that: the winding section includes a winding motor and a gear set disposed on the bracket, a winding reel is connected above the gear set, a winding frame is disposed on the winding reel, and a vertical plate is detachably connected to the winding frame.

[0015] In summary, the beneficial technical effects of the present invention are as follows:

[0016] (1) The pre-bending device can pre-bend round steel with a diameter of less than 40mm, and can also pre-bend the same round steel into steel with different curvatures, which has wide applicability.

[0017] (2) Servo motor + planetary reducer directly drives the force wheel and can adjust its position.

[0018] (3) The position of the power wheel is adjusted by direct connection between the servo motor and the screw jack, and the position can be adjusted online.

[0019] (4) The pre-bending machine head rotates through the rotating bearing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure from another perspective of one embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present invention (mainly used to illustrate the structure related to the pre-bending servo motor);

[0023] Figure 4 This is a cross-sectional schematic diagram of an embodiment of the present invention (mainly used to illustrate the related structures of the pre-bending wheel assembly structure);

[0024] Figure 5 This is an exploded structural diagram of the winding section in one embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the pre-bending frame, feeding section, and protective section in one embodiment of the present invention.

[0026] Reference numerals: 1. Bracket; 2. Fixing frame; 3. Feeding section; 4. Pre-bending section; 5. Protective section; 6. Rewinding section; 7. Pre-bending frame; 8. Moving block; 9. Drive wheel; 10. Servo motor; 11. Lead screw; 12. Adjusting motor; 13. Reversing device; 14. Bearing housing; 15. Rotary bearing; 16. Pin; 17. Insertion hole; 18. Planetary reducer; 19. Feeding rack; 20. Protective hose; 21. Elastic plate; 22. Rewinding motor; 23. Gear set; 24. Rewinding reel; 25. Rewinding frame; 26. Vertical plate; 27. Fixing wheel; 28. Cleaning ring. Detailed Implementation

[0027] The present invention will now be clearly and completely described in conjunction with embodiments.

[0028] See appendix Figure 1-6An automatic pre-bending mechanism for large-size round steel bars includes a support 1 and a fixed frame 2 rotatably connected to the support 1. The fixed frame 2 is provided with a feeding part 3, a pre-bending part 4, and a protective part 5. The support 1 is provided with a winding part 6. The pre-bending part 4 includes a pre-bending frame 7 fixedly connected to the fixed frame 2. The pre-bending frame 7 is rotatably connected with a fixed wheel 27. Two moving blocks 8 are slidably connected to the pre-bending frame 7. Each of the two moving blocks 8 is rotatably connected with a drive wheel 9. Both drive wheels 9 are driven by a servo motor 10. A lead screw 11 is provided on the moving blocks 8. Two adjusting motors 12 are provided on the pre-bending frame 7. The output end of the adjusting motor 12 is connected to the lead screw 11 through a commutator 13.

[0029] The fixed frame 2 is provided with a bearing seat 14, and the bracket 1 is provided with a rotating bearing 15. The fixed frame 2 and the bracket 1 are rotatably connected by the bearing. The fixed frame 2 is provided with a pin 16, and the bracket 1 is provided with several insertion holes 17. The servo motor 10 is connected to the drive wheel 9 through a planetary reducer 18.

[0030] When this device is in use, the bracket 1 is fixed on the ground, the rotating bearing 15 is fixed on the bracket 1 with screws, the bearing seat 14 is fixed on the rotating bearing 15 with screws, the fixing frame 2 is fixed on the bearing seat 14 with screws, the fixing frame 2 can rotate freely, and the positioning pin 16 fixes the fixing frame 2 in the designated position.

[0031] The pre-bending section 4 is connected to the pre-bending frame 7 and the fixed frame 2 by screws. The fixed wheel 27 is fixed to the pre-bending frame 7 by screws. The drive wheel 9 is fixed to one end of the output shaft of the servo motor 10 by screws and keys. The other end of the output shaft of the servo motor 10 is equipped with a sealed bearing and fixed by an R-type radial locking nut. The whole assembly is installed in the moving block 8 and fixed in the moving block 8 by the bearing cover, spacer, and planetary reducer 18. The servo motor 10 and the planetary reducer 18 are directly connected, and the output shaft of the planetary reducer 18 and the servo motor 10 are directly connected. The servo motor 10 is controlled by the EtherCat bus to ensure synchronous speed. Moreover, the servo motor 10 maintains high torque even at low speeds, ensuring sufficient power even at low speeds when operating large-diameter round steel. The servo motor 10 and the planetary reducer 18 are directly connected together and fixed to the pre-bending frame 7 of the lifting platform. By inputting the data of the desired pre-bending angle, the positions of the two drive wheels 9 can be adjusted online electrically to obtain the desired arc, and the positions of the two drive wheels 9 are self-locked to ensure their stability. The servo motor 10 has a positioning function. If you want to get the same arc next time, you can adjust it to the correct position in one go, saving time and effort.

[0032] In this way, the machine can be stopped and adjusted at any time, and the same round steel bar can be divided into different lengths, thereby enabling the same round steel bar to be pre-bent into steel with different curvatures at different distances.

[0033] By using the rotating bearing 15 between the bracket 1 and the fixed frame 2, the entire fixed frame 2 can be rotated after a steel bar is pre-bent, so that it will not interfere with the handling and transportation of the pre-bent steel bar.

[0034] Combined with appendix Figure 4 , attached Figure 6 The feeding section 3 includes a feeding rack 19 mounted on the fixed frame 2, with a feeding hole on the feeding rack 19 and a cleaning ring 28 inside the feeding hole. The protective section 5 includes a protective frame mounted on the fixed frame 2, with a protective hose 20 connected to the protective frame, and an elastic plate 21 on one side of the protective hose 20. The winding section 6 includes a winding motor 22 and a gear set 23 mounted on the bracket 1, with a winding reel 24 connected above the gear set 23, a winding frame 25 mounted on the winding reel 24, and a vertical plate 26 detachably connected to the winding frame 25.

[0035] During feeding, this device can clean impurities and burrs on the surface of the steel. During discharge, it can ensure that the steel is discharged in the desired direction, thereby controlling the running path of the steel after deformation. The coiler 24 can coil the steel, and the arc plate can prevent the steel from injuring people due to its own elasticity.

[0036] The working principle of this embodiment is as follows: The pre-bending section is screwed onto the pre-bending frame and the fixed frame. The fixed wheel is fixed to the pre-bending frame with screws. The drive wheel is fixed to one end of the output shaft of the servo motor with screws and keys. The other end of the output shaft of the servo motor is equipped with a sealed bearing and fixed with an R-type radial locking nut. The whole assembly is installed in the moving block and fixed in the moving block by the bearing cover, spacer, and planetary reducer. The servo motor and the planetary reducer are directly connected, and the output shaft of the planetary reducer and the servo motor are directly connected. The servo motor is controlled via EtherCat bus to ensure synchronized speed. Moreover, the servo motor maintains high torque even at low speeds, ensuring sufficient power even at low speeds when operating large-diameter round steel. The servo motor and the planetary reducer are directly connected together and fixed to the pre-bending frame of the lifting platform. By inputting the data of the desired pre-bending angle, the positions of the two drive wheels can be electrically adjusted online to obtain the desired arc, and the self-locking mechanism ensures the position of the two drive wheels. The servo motor has a positioning function. For the same specifications and materials, the same arc can be adjusted in one go to obtain the same position next time, saving time and effort.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic pre-bending mechanism for large-size round steel bars, characterized in that: The device includes a support (1) and a fixed frame (2) rotatably connected to the support (1). The fixed frame (2) is provided with a feeding part (3), a pre-bending part (4) and a protective part (5). The support (1) is provided with a winding part (6). The pre-bending part (4) includes a pre-bending frame (7) fixedly connected to the fixed frame (2). The pre-bending frame (7) is rotatably connected with a fixed wheel (27). The pre-bending frame (7) is slidably connected with two moving blocks (8). Each of the two moving blocks (8) is rotatably connected with a drive wheel (9). Both drive wheels (9) are driven by a servo motor (10). The moving block (8) is provided with a lead screw (11). The pre-bending frame (7) is provided with two adjusting motors (12). The output end of the adjusting motor (12) is connected to the lead screw (11) through a commutator (13).

2. The automatic pre-bending mechanism for large-size round steel according to claim 1, characterized in that: The fixed frame (2) is provided with a bearing seat (14), the bracket (1) is provided with a rotating bearing (15), the fixed frame (2) and the bracket (1) are rotatably connected by the bearing, the fixed frame (2) is provided with a pin (16), and the bracket (1) is provided with a plurality of insertion holes (17).

3. The automatic pre-bending mechanism for large-size round steel according to claim 1, characterized in that: The servo motor (10) is connected to the drive wheel (9) via a planetary reducer (18).

4. The automatic pre-bending mechanism for large-size round steel according to claim 1, characterized in that: The feeding section (3) includes a feeding rack (19) disposed on the fixed frame (2), the feeding rack (19) is provided with a feeding hole, and a cleaning ring (28) is disposed in the feeding hole.

5. The automatic pre-bending mechanism for large-size round steel according to claim 1, characterized in that: The protective part (5) includes a protective frame disposed on the fixed frame (2), a protective hose (20) is connected to the protective frame, and an elastic plate (21) is disposed on one side of the protective hose (20) on the protective frame.

6. The automatic pre-bending mechanism for large-size round steel according to claim 1, characterized in that: The winding section (6) includes a winding motor (22) and a gear set (23) mounted on the bracket (1). A winding reel (24) is connected above the gear set (23). A winding frame (25) is mounted on the winding reel (24). A vertical plate (26) is detachably connected to the winding frame (25).

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