Reinforcing steel bar arc bending mechanism

Abstract

The invention discloses a steel bar arc bending mechanism, and belongs to the field of steel bar machining. The steel bar arc bending mechanism comprises a rotating disc and a first rotating shaft which is fixedly arranged at the bottom of the rotating disc and can rotate, and a plurality of bending die head assemblies are evenly arranged on the rotating disc; the bending die head assembly comprises a first lead screw rotationally connected to the bottom of the rotating disc, a first movable plate in threaded connection to the first lead screw, a die head arranged on the top of the first movable plate, a second rotating shaft rotationally connected to the first rotating shaft, a first bevel gear fixedly arranged on the first lead screw and a second bevel gear fixedly arranged on the second rotating shaft. The first bevel gear is in meshed connection with the second bevel gear, a control assembly used for driving the second rotating shaft to rotate synchronously is arranged on the first rotating shaft, and a plurality of scale marks are evenly arranged on the top of the rotating disc. The radial position of the die head is synchronously adjusted, so that the radian of a bent arc of a reinforcing steel bar can be conveniently and accurately controlled, and the machining requirements of different curvature radiuses are met.

Description

Technical Field

[0001] This invention relates to the field of steel bar processing, and in particular to a steel bar arc bending mechanism. Background Technology

[0002] In the field of reinforced concrete structure construction, the bending and processing of reinforcing bars is a fundamental step in shaping the geometric form and mechanical properties of building structures. Precisely bending straight reinforcing bars into curved components with specific radii of curvature can be widely applied in many typical engineering scenarios, such as arched main beams and ribbed arches, curved floor slabs and curved roofs, circular pools and culvert structures, etc. The appropriate application of these curved reinforcing bar components in building structures can effectively improve the spatial stiffness, load distribution performance, and overall aesthetics of the structure. However, the processing precision and forming efficiency of curved reinforcing bars affect project quality and construction progress, placing high demands on bending techniques and equipment.

[0003] Currently, common rebar bending equipment mainly includes simple manual bending machines, semi-automatic hydraulic bending machines, and some CNC bending centers. In practical engineering applications, most equipment relies on fixed-specification molds or stops to adjust the bending radius, achieving different arc diameters by changing the molds or mechanical adjustments. This method of adjustment is cumbersome, especially when processing large-radius curved components. Furthermore, some simple manual bending machines rely mainly on the operator's experience or external measuring tools to adjust the mold position, making it difficult to guarantee adjustment accuracy. In addition, some equipment still relies on manual assistance in pushing the rebar during the bending process. When processing long or large-diameter rebars in batches, the feeding speed is difficult to control precisely, which may lead to uneven curvature and an unsmooth arc in the bending segment, while also increasing the physical burden on the operator, resulting in low processing efficiency and high labor intensity. Summary of the Invention

[0004] This invention provides a steel bar arc bending mechanism, which can solve the problems of inconvenient and intuitive adjustment of the bending arc in the prior art, cumbersome adjustment steps, and poor applicability.

[0005] A steel bar arc bending mechanism includes a turntable and a first rotating shaft fixed to the bottom of the turntable and rotatable, wherein a plurality of bending die head assemblies are evenly arranged on the turntable; The bending die assembly includes a first lead screw rotatably connected to the bottom of the turntable, a first movable plate threadedly connected to the first lead screw, a die head disposed on the top of the first movable plate, a second rotating shaft rotatably connected to a first rotating shaft, a first bevel gear fixed to the first lead screw, and a second bevel gear fixed to the second rotating shaft. The first bevel gear and the second bevel gear are meshed together. The first rotating shaft is provided with a control component for driving the second rotating shaft to rotate synchronously. The top of the turntable is evenly provided with multiple scale lines. One of the first movable plates is provided with a limiting block, which cooperates with the adjacent mold head to clamp the steel bar to be bent.

[0006] Preferably, the first rotating shaft is provided with a rotatable first gear ring, and the bending die assembly further includes a first gear fixed on the second rotating shaft. The first gear is meshed with the first gear ring, and the control assembly realizes the rotation of the second rotating shaft by controlling the rotation of the first gear ring.

[0007] Preferably, the control component includes a third rotating shaft rotatably connected to a first rotating shaft, a worm gear fixed to the third rotating shaft, a rotating rod rotatably connected to a turntable, and a worm fixed to the rotating rod, wherein the worm is meshed with the worm gear, and the first gear ring is fixed to the third rotating shaft.

[0008] Preferably, an adjustment component is provided on one of the first movable plates near the limiting block, the adjustment component being used to adjust the distance between the limiting block and the first movable plate.

[0009] Preferably, the adjustment assembly includes a connecting frame fixed to the first movable plate, a second lead screw rotatably connected to the connecting frame, and a second movable plate threadedly connected to the second lead screw, wherein the limiting block is fixedly connected to the second movable plate.

[0010] Preferably, a plurality of rollers are evenly installed on the top of the turntable, and a feeding assembly is provided above the rollers. The feeding assembly is used to cooperate with the rollers to guide the reinforcing bars to be fed in a straight direction.

[0011] Preferably, a fixed frame is provided on one side of the turntable, and an mounting frame is installed on the top of the fixed frame. The feeding assembly includes a cylinder fixed on the mounting frame, a mounting plate fixed on the cylinder drive shaft, a pressure roller rotatably connected to the mounting plate, and a second motor fixed on the mounting plate. The central shaft of the pressure roller is fixedly connected to the output shaft of the second motor.

[0012] Preferably, the fixing frame is fixed with multiple bolts, the mounting frame has a movable groove inside, and each movable groove is provided with a bolt, all of which are fixed to the top of the fixing frame.

[0013] Preferably, a guide wheel is rotatably connected to the mounting bracket, and the guide wheel can slide in contact with the reinforcing bar.

[0014] Preferably, it also includes a base located below the turntable, the first rotating shaft being rotatably connected to the base, and the base being provided with a drive assembly for rotating the first rotating shaft.

[0015] This invention provides a steel bar arc bending mechanism, which has the following beneficial effects: 1. The rotation of the rotating rod drives the worm gear and worm wheel, which in turn drives the third rotating shaft and the first gear ring to rotate. The first gear ring synchronously drives the first gear on each bending die assembly and the second rotating shaft to rotate. The second rotating shaft, through the meshing of the second bevel gear with the first bevel gear on the first lead screw, drives the first movable plate to move linearly, thereby achieving synchronous adjustment of each bending die along the radial direction of the turntable. Simultaneously, a scale line is set on the top of the turntable, providing a positioning reference for adjusting the die position. This allows the operator to precisely control the radial distance adjustment of each die according to the preset curvature, thus enabling convenient and accurate control of the arc curvature of the steel bar bending and adapting to processing requirements with different radii of curvature.

[0016] 2. The cylinder drives the mounting plate to move downwards, causing the pressure roller to press the reinforcing bar onto the multiple rollers below. At the same time, the second motor drives the pressure roller to rotate actively. The rolling support of the pressure roller and the rollers enables the automatic feeding of the reinforcing bar to the bending position. After the front end of the reinforcing bar is clamped between the limiting block and the die head, the first motor starts, driving the turntable, the die head, and the clamped end of the reinforcing bar to rotate around the central axis. At the same time, the guide wheel guides the main body of the reinforcing bar to bend smoothly, thus connecting the automatic feeding and rotation bending processes to complete the automated bending and improve the efficiency of reinforcing bar bending processing. Attached Figure Description

[0017] Figure 1 A schematic diagram of a steel bar arc bending mechanism provided by the present invention. Figure 1 ; Figure 2 A schematic diagram of a steel bar arc bending mechanism provided by the present invention. Figure 2 ; Figure 3 A schematic diagram of the turntable structure of a steel bar arc bending mechanism provided by the present invention (view from below). Figure 4 A schematic diagram of the feeding assembly structure of a steel bar arc bending mechanism provided by the present invention; Figure 5 The present invention provides a steel bar arc bending mechanism. Figure 2 Enlarged structural diagram at point A in the middle; Figure 6 The present invention provides a steel bar arc bending mechanism. Figure 3 Enlarged structural diagram at point B.

[0018] Explanation of reference numerals in the attached figures: 1. Turntable; 2. First rotating shaft; 3. Bending die head assembly; 31. Through slot; 32. Die head; 33. First lead screw; 34. First movable plate; 35. Second rotating shaft; 36. First bevel gear; 37. Second bevel gear; 38. First gear; 4. First gear ring; 5. Control assembly; 51. Third rotating shaft; 52. Worm gear; 53. Rotating rod; 54. Worm; 6. Scale line; 7. Drive assembly; 71. First motor; 72. Second gear; 73. Second gear ring; 8. Feeding assembly; 81. Cylinder; 82. Mounting plate; 83. Pressure roller; 84. Second motor; 9. Adjustment assembly; 91. Connecting frame; 92. Second lead screw; 93. Second movable plate; 10. Limit block; 11. Roller; 12. Base; 13. Fixing frame; 14. Mounting frame; 15. Guide wheel; 16. Bolt. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] like Figures 1 to 6 As shown in the figure, an embodiment of the present invention provides a steel bar arc bending mechanism, including a turntable 1, a base 12 disposed below the turntable 1, and a first rotating shaft 2 fixedly disposed at the bottom of the turntable 1. The first rotating shaft 2 is rotatably connected to the base 12. A plurality of bending die head assemblies 3 are evenly disposed on the turntable 1. The bending die head assembly 3 includes a through groove 31 formed on the turntable 1, a first lead screw 33 rotatably connected to the bottom of the turntable 1, a first movable plate 34 threadedly connected to the first lead screw 33, a die head 32 disposed on the top of the first movable plate 34, and a second rotating shaft 35 rotatably connected to the first rotating shaft 2. A first bevel gear 36 is fixed on the first lead screw 33 and a second bevel gear 37 is fixed on the second rotating shaft 35. The first bevel gear 36 and the second bevel gear 37 are meshed and connected. The die head 32 extends to the top of the turntable 1 after passing through the through groove 31. The first rotating shaft 2 is provided with a control component 5 for driving the second rotating shaft 35 to rotate synchronously. The top of the turntable 1 is evenly provided with multiple scale lines 6. A first movable plate 34 is provided with a limiting block 10. The limiting block 10 cooperates with the adjacent die head 32 to clamp the steel bar to be bent. The turntable 1 is provided with a guide wheel 15 that can slide in contact with the steel bar.

[0021] When the control component 5 drives the second rotating shaft 35 to rotate, the second bevel gear 37 rotates accordingly. The meshing of the second bevel gear 37 with the first bevel gear 36 drives the first lead screw 33 to rotate. When the first lead screw 33 rotates, the threaded connection between the first movable plate 34 and the first lead screw 33 enables the linear movement of the first movable plate 34. The die head 32 fixed on the first movable plate 34 moves synchronously, realizing the adjustment of the radial position of the die head 32 on the turntable 1. By adjusting the radial position of all the die heads 32 from the rotation center of the turntable 1, the arc of the rebar bending can be easily controlled. Furthermore, a scale line 6 is set on the top of the turntable 1 (the zero scale is aligned with the center of the turntable 1). During the adjustment process, the operator can observe the scale reading corresponding to the position of the die head 32 in the through groove 31, better monitor the radial movement distance of the die head 32, and thus better control the bending arc. Driven by the control component 5, the bevel gear pair formed by the first bevel gear 36 and the second bevel gear 37, in conjunction with the first lead screw 33 and the first movable plate 34, combined with the scale line 6 on the surface of the turntable 1, realizes the adjustment and precise control of the bending arc.

[0022] Once the die head 32 is positioned, the first rotating shaft 2 rotates to drive the entire turntable 1 to rotate. One end of the reinforcing bar is clamped between the limiting block 10 and the die head 32. As the turntable 1 rotates, the die head 32 applies a continuous bending force to the reinforcing bar, causing it to gradually form the desired arc shape around the die head 32. The guide wheel 15 remains in contact with the reinforcing bar during this process, guiding and limiting the reinforcing bar, thus enabling the bending operation.

[0023] Regarding the number of dies 32, those skilled in the art will understand that the number of dies 32 shown in the illustrations of this application is merely an example. The number of bending die components 3 must be set to ensure continuous or quasi-continuous support for the reinforcing bar during the bending process. In practical applications, the number of dies 32 is adjusted according to the radius of the target bending arc, the diameter of the reinforcing bar, and the requirements for bending accuracy. Generally speaking, the more dies 32 there are, the smoother the arc formed. In this way, during the bending process, the reinforcing bar will always maintain contact with two or more dies 32. The previous die 32 serves as the current bending fulcrum, and the next die 32 is ready to take over as the next support point. Through the continuous rotation of the turntable 1, the progressive arc bending of the reinforcing bar is achieved.

[0024] In some specific implementation plans, such as Figure 3 and Figure 6As shown. The first rotating shaft 2 is provided with a rotatable first gear ring 4. The bending die assembly 3 also includes a first gear 38 fixed on the second rotating shaft 35. The first gear 38 is meshed with the first gear ring 4. The control assembly 5 realizes the rotation of the second rotating shaft 35 by controlling the rotation of the first gear ring 4. The control assembly 5 includes a third rotating shaft 51 rotatably connected to the first rotating shaft 2, a worm gear 52 fixed on the third rotating shaft 51, a rotating rod 53 rotatably connected to the turntable 1, and a worm 54 fixed on the rotating rod 53. The worm 54 is meshed with the worm gear 52. The first gear ring 4 is fixed on the third rotating shaft 51.

[0025] Rotating rod 53 drives worm wheel 52 and third rotating shaft 51 to rotate via worm 54. Third rotating shaft 51 drives first gear ring 4 to rotate, thereby driving each first gear 38 to rotate synchronously through first gear ring 4, so as to realize the rotation of each second rotating shaft 35 and synchronously adjust all bending die head assemblies 3.

[0026] In some specific implementation plans, such as Figure 5 As shown. One of the movable plates 34 near the limiting block 10 is provided with an adjustment component 9. The adjustment component 9 is used to adjust the distance between the limiting block 10 and the first movable plate 34. The adjustment component 9 includes a connecting frame 91 fixed on the first movable plate 34, a second lead screw 92 rotatably connected to the connecting frame 91, and a second movable plate 93 threadedly connected to the second lead screw 92. The limiting block 10 is fixedly connected to the second movable plate 93.

[0027] Rotating the second lead screw 92 can adjust the distance between the limit block 10 and the mold head 32 to accommodate different steel bar diameters.

[0028] In some specific implementation plans, such as Figure 1 and Figure 4 As shown. Multiple rollers 11 are evenly installed on the top of the turntable 1. A feeding assembly 8 is provided above the rollers 11. The feeding assembly 8 is used to cooperate with the rollers 11 to guide the steel bars to be fed in a straight direction. A fixed frame 13 is provided on one side of the turntable 1. A mounting frame 14 is installed on the top of the fixed frame 13. A guide wheel 15 is rotatably installed on the mounting frame 14. The guide wheel 15 is located within the rotation range of the limit block 10. The feeding assembly 8 includes a cylinder 81 fixed on the mounting frame 14, a mounting plate 82 fixed on the drive shaft of the cylinder 81, a pressure roller 83 rotatably connected to the mounting plate 82, and a second motor 84 fixed on the mounting plate 82. The central shaft of the pressure roller 83 is fixedly connected to the output shaft of the second motor 84.

[0029] When the reinforcing bar is placed between the limiting block 10 and the die head 32, above the roller 11, the cylinder 81 drives the pressure roller 83 to press down, and the second motor 84 drives the pressure roller 83 to rotate, which, together with the roller 11, automatically feeds the reinforcing bar along the straight direction to the bending part for bending.

[0030] In some specific implementation plans, such as Figure 1 and Figure 4 As shown. The fixed frame 13 is fixed with multiple bolts 16. The mounting frame 14 has a movable groove inside, and each movable groove is equipped with a bolt 16. The bolts 16 are all fixed to the top of the fixed frame 13, and each bolt 16 is threaded with a nut.

[0031] The top of the fixed frame 13 is fitted with a mounting bracket 14 by bolts 16 and nuts. The horizontal position of the mounting bracket 14 can be adjusted to adjust the position of the pressure roller 83 and the guide roller 15, so as to better contact the reinforcing bar by adjusting the position according to the mold head 32.

[0032] In some specific implementation plans, such as Figure 3 and Figure 6 As shown, a drive assembly 7 for rotating the first rotating shaft 2 is provided at the base 12. The drive assembly 7 includes a first motor 71 fixed on the base 12, a second gear 72 fixed on the output shaft of the first motor 71, and a second gear ring 73 fixed on the first rotating shaft 2. The second gear 72 and the second gear ring 73 are meshed together. When the first motor 71 is started, it drives the first rotating shaft 2 and the turntable 1 to rotate as a whole through the transmission between the second gear 72 and the second gear ring 73, thereby realizing the arc bending of the steel bar.

[0033] In some specific implementation plans, such as Figure 3 and Figure 5 As shown. One end of the second lead screw 92 and the rotating rod 53 both extend towards the edge of the turntable 1 and are both fixed with a rotating operating component, which can be a knob, operating panel, etc., to facilitate operation of the second lead screw 92 and the rotating rod 53. The first movable plate 34 has a guide rod slidably connected through it, and the guide rod is fixed on the turntable 1. The second movable plate 93 is slidably connected to the adjacent guide rod.

[0034] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios: The operator rotates the rotating rod 53, causing the worm gear 54 to rotate. The meshing of the worm gear 54 and the worm wheel 52 drives the third rotating shaft 51 to rotate, and the first gear ring 4 rotates accordingly. The first gear ring 4 meshes with the first gear 38, driving each of the second rotating shafts 35 to rotate synchronously. The second bevel gear 37 on the second rotating shaft 35 drives the first bevel gear 36 to rotate, which in turn causes the first lead screw 33 to rotate. The rotation of the first lead screw 33 causes the corresponding die head 32 to move synchronously within the through slot 31, changing its radial position from the rotation center of the turntable 1. The operator can precisely control the moving distance of the die head 32 by observing the reading corresponding to the scale line 6 on the top of the turntable 1, thereby determining the radius of curvature of the subsequent rebar bend. For rebars of different diameters, the second movable plate 93 can be moved by rotating the second lead screw 92 to adjust the clamping distance between the limit block 10 and the adjacent die head 32, ensuring a stable clamping effect.

[0035] The rebar to be bent is placed horizontally on the roller 11, and its end is clamped between the limiting block 10 and the adjacent die head 32. The starting cylinder 81 drives the mounting plate 82 to descend, causing the pressure roller 83 to press the rebar. At the same time, the second motor 84 starts, driving the pressure roller 83 to rotate, and the rebar is fed forward. Simultaneously, the first motor 71 of the drive assembly 7 starts, driving the second gear 72 to rotate. The meshing of the second gear 72 and the second gear ring 73 drives the first rotating shaft 2, the turntable 1, and the various components on the turntable 1 to rotate synchronously. During the rotation, the end of the rebar clamped and fixed by the limiting block 10 and the die head 32, and the main body of the rebar in contact with the limiting contact by the guide wheel 15, will bend and deform as the turntable 1 rotates. The rebar is gradually bent into the required arc around the center of the turntable 1 using multiple dies 32 evenly distributed along the circumference as forming molds. The angle of the bending arc can be controlled by controlling the rotation angle of the first motor 71.

[0036] After bending is completed, drive assembly 7 stops, and pressure roller 83 of feeding assembly 8 rises, allowing the operator to remove the formed arc steel bar workpiece and complete the arc bending of the steel bar.

[0037] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A steel bar arc bending mechanism, comprising a turntable (1) and a first rotating shaft (2) fixed to the bottom of the turntable (1) and rotatable, characterized in that, The turntable (1) is evenly provided with multiple bending die head assemblies (3); The bending die assembly (3) includes a first lead screw (33) rotatably connected to the bottom of the turntable (1), a first movable plate (34) threadedly connected to the first lead screw (33), a die head (32) disposed on the top of the first movable plate (34), a second rotating shaft (35) rotatably connected to the first rotating shaft (2), a first bevel gear (36) fixed on the first lead screw (33), and a second bevel gear (37) fixed on the second rotating shaft (35). The first bevel gear (36) and the second bevel gear (37) are meshed together. The first rotating shaft (2) is provided with a control component (5) for driving the second rotating shaft (35) to rotate synchronously. The top of the turntable (1) is evenly provided with multiple scale lines (6). One of the first movable plates (34) is provided with a limiting block (10), which cooperates with the adjacent mold head (32) to clamp the steel bar to be bent.

2. The steel bar arc bending mechanism as described in claim 1, characterized in that, The first rotating shaft (2) is provided with a rotatable first gear ring (4), and the bending die assembly (3) further includes a first gear (38) fixed on the second rotating shaft (35). The first gear (38) meshes with the first gear ring (4), and the control assembly (5) realizes the rotation of the second rotating shaft (35) by controlling the rotation of the first gear ring (4).

3. The steel bar arc bending mechanism as described in claim 2, characterized in that, The control component (5) includes a third shaft (51) rotatably connected to the first shaft (2), a worm gear (52) fixed on the third shaft (51), a rotating rod (53) rotatably connected to the turntable (1), and a worm (54) fixed on the rotating rod (53). The worm (54) meshes with the worm gear (52), and the first gear ring (4) is fixed on the third shaft (51).

4. The steel bar arc bending mechanism as described in claim 1, characterized in that, An adjustment component (9) is provided on one of the first movable plates (34) near the limiting block (10), the adjustment component (9) being used to adjust the distance between the limiting block (10) and the first movable plate (34).

5. A steel bar arc bending mechanism as described in claim 4, characterized in that, The adjustment assembly (9) includes a connecting frame (91) fixed on the first movable plate (34), a second lead screw (92) rotatably connected to the connecting frame (91), and a second movable plate (93) threadedly connected to the second lead screw (92). The limiting block (10) is fixedly connected to the second movable plate (93).

6. The steel bar arc bending mechanism as described in claim 1, characterized in that, The turntable (1) is uniformly equipped with multiple rollers (11) on its top. A feeding assembly (8) is provided above the rollers (11). The feeding assembly (8) is used to cooperate with the rollers (11) to guide the reinforcing bars to be fed in a straight direction.

7. A steel bar arc bending mechanism as described in claim 6, characterized in that, A fixed frame (13) is provided on one side of the turntable (1), and a mounting frame (14) is installed on the top of the fixed frame (13). The feeding assembly (8) includes a cylinder (81) fixed on the mounting frame (14), a mounting plate (82) fixed on the drive shaft of the cylinder (81), a pressure roller (83) rotatably connected to the mounting plate (82), and a second motor (84) fixed on the mounting plate (82). The central shaft of the pressure roller (83) is fixedly connected to the output shaft of the second motor (84).

8. A steel bar arc bending mechanism as described in claim 7, characterized in that, The fixed frame (13) is fixed with a plurality of bolts (16), and the mounting frame (14) has a movable groove inside, and each movable groove is provided with a bolt (16), and the bolts (16) are all fixed to the top of the fixed frame (13).

9. A steel bar arc bending mechanism as described in claim 7, characterized in that, The mounting bracket (14) is rotatably connected to a guide wheel (15), which can slide in contact with the reinforcing bar.

10. A steel bar arc bending mechanism as described in claim 2, characterized in that, It also includes a base (12) located below the turntable (1), the first rotating shaft (2) is rotatably connected to the base (12), and the base (12) is provided with a drive assembly (7) for driving the first rotating shaft (2) to rotate.

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