A bending machine

Abstract

This utility model relates to the field of bending equipment technology, specifically to a bending machine, including a frame, several pairs of clamping wheels, upper guide wheels, lower guide wheels, and upper bending wheels mounted on the frame. A drive mechanism is mounted on the frame. A cleaning mechanism is mounted on the end of the frame at the feeding end of the clamping wheels. A straightening mechanism is mounted on the frame between the discharge end of the cleaning mechanism and the feeding end of the clamping wheels. Each straightening mechanism includes a support, a pair of rotatable bearing wheels mounted on the support, and an adjusting cylinder mounted on the support. A top pressure column is movably inserted into the support. One end of the top pressure column is hinged to a lever block, one end of which is hinged to the support, and the other end is hinged to the adjusting cylinder. A top pressure wheel is mounted on the other end of the top pressure column. The top pressure wheel, in conjunction with the two bearing wheels, clamps the workpiece to be bent. This bending machine can straighten the workpiece before bending it, improving the bending efficiency of already bent workpieces or some rolled materials and reducing equipment costs.

Description

Technical Field

[0001] This utility model relates to the field of bending equipment technology, specifically to a bending machine. Background Technology

[0002] In industrial production, bending various pipe fittings is often required to meet equipment or operational requirements. Currently, the most commonly used machines are continuous pipe bending machines or circular bending machines, which can continuously bend pipe fittings in batches, offering high production efficiency and good bending quality. These existing machines also feature automatic feeding and adjustable bending curvature, as illustrated by patents CN201621178608.4 - A Simple Pipe Bending Device or CN202021659844.4 - Pipe Bending Machine. However, these machines can only bend straight materials. They cannot process pre-processed or incorrectly bent parts or rolled materials. Discarding these parts or materials directly would waste materials. Pre-straightening before bending requires new straightening equipment, increasing equipment costs and subsequent operating costs. Utility Model Content

[0003] In order to overcome one of the shortcomings of the existing technology, the purpose of this utility model is to provide a bending machine that can straighten the workpiece before bending it, thereby improving the bending efficiency of the already bent workpiece or some roll materials and reducing equipment costs.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A bending machine includes a frame, several pairs of clamping wheels, upper guide wheels, lower guide wheels, and upper bending wheels mounted on the frame. A drive mechanism is mounted on the frame, capable of driving the clamping wheels, upper guide wheels, lower guide wheels, and upper bending wheels to rotate. A cleaning mechanism is mounted on the frame at the feeding end of the clamping wheels. Two sets of straightening mechanisms are mounted on the frame in the area between the discharge end of the cleaning mechanism and the feeding end of the clamping wheels. Each set of straightening mechanisms includes a support and a pair of rollers rotatably mounted on the support. The device includes a bearing wheel and an adjusting cylinder mounted on the bracket. A top pressure column is movably inserted into the bracket. One end of the top pressure column is hinged to a lever block, and one end of the lever block is hinged to the bracket. The other end of the lever block is hinged to the telescopic end of the adjusting cylinder. The other end of the top pressure column is provided with a rotatable top pressure wheel. The top pressure wheel is located in the area between the two bearing wheels and cooperates with the two bearing wheels to clamp the workpiece to be bent. The rotation axes of the two top pressure wheels on the two straightening mechanisms are perpendicular to each other.

[0006] In some possible implementations, a mounting base is provided at one end of the non-hinged lever block of the top pressure column, and the top pressure wheel is rotatably mounted on the mounting base.

[0007] In some possible implementations, a connecting cylinder is provided on the mounting base corresponding to the correction mechanism on the side near the cleaning mechanism. One end of the top pressure column is movably inserted into the connecting cylinder and can rotate relative to the connecting cylinder. A shock-absorbing spring is provided inside the connecting cylinder, and the two ends of the shock-absorbing spring are respectively connected to the end of the top pressure column and the bottom of the connecting cylinder.

[0008] In some possible implementations, the bracket is provided with guide posts, and the mounting base is slidably mounted on the guide posts.

[0009] In some possible implementations, the cleaning mechanism includes a triangular frame and roller brushes rotatably disposed on the inside of the triangular frame, the triangular frame being mounted on the frame, and the workpiece to be bent being able to move through the triangular structure formed by all the roller brushes.

[0010] In some possible implementations, the triangular frame is provided with a flexible connecting block that is deformable and is mounted on the frame.

[0011] In some possible implementations, the frame is provided with several opening slots, and vertical rails are provided on both sides of each opening slot. A sliding seat is slidably installed on each of the two vertical rails of each opening slot. Any one of the upper guide wheel, the upper bending wheel, and a pair of cooperating clamping wheels is rotatably installed on the corresponding sliding seat. A fixing plate is provided on the opening of all the opening slots, and a screw is screwed through the fixing plate. One end of the screw is rotatably connected to the corresponding sliding seat, and a handwheel is provided on the other end of the screw.

[0012] In some possible implementations, the drive mechanism includes a drive motor and a chain, the drive motor being mounted within the frame, and each pair of clamping wheels, upper guide wheels, lower guide wheels, and upper bending tube wheels being provided with a sprocket that cooperates with the chain, the chain being wound around the output end of the drive motor.

[0013] Compared to existing technologies, the advantages of this invention are as follows: The bending machine of this invention, through the inclusion of a cleaning mechanism, can effectively remove impurities from the surface of the workpiece to be bent, protecting subsequent molds and improving product surface quality. The use of a correction mechanism with two sets of mutually perpendicular top pressure roller axes enables precise correction of the workpiece to be bent from both horizontal and vertical directions, eliminating initial deformation and ensuring that the workpiece entering the main bending mechanism remains in an ideal state, thereby significantly improving bending accuracy and finished product qualification rate. The overall structure is rationally designed, easy to adjust, and highly automated.

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a simplified structural diagram of the drive mechanism in an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the cleaning mechanism in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the corrective mechanism in an embodiment of the present invention. Figure 1 ;

[0019] Figure 5 This is a schematic diagram of the corrective mechanism in an embodiment of the present invention. Figure 2 ;

[0020] Figure 6 This is a schematic diagram of the corrective mechanism in an improved embodiment of the present invention.

[0021] Explanation of icon numbers:

[0022] Frame 10, opening slot 11, vertical rail 12, sliding seat 13, fixing plate 14, screw 15, handwheel 16;

[0023] 20 clamping wheels;

[0024] Upper guide wheel 30;

[0025] Lower guide wheel 40;

[0026] Upper bend roller 50;

[0027] Drive mechanism 60, drive motor 61, chain 62;

[0028] Cleaning mechanism 70, triangular frame 71, roller brush 72, elastic connecting block 73;

[0029] Correction mechanism 80, bracket 81, bearing wheel 82, adjusting cylinder 83, top pressure column 84, lever block 85, top pressure wheel 86, mounting base 87, connecting cylinder 88, shock absorption spring 89, guide column 8a. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0031] Reference Figures 1 to 6 As shown, this utility model provides a bending machine, including a frame 10, several pairs of clamping wheels 20, an upper guide wheel 30, a lower guide wheel 40, an upper bending wheel 50, a drive mechanism 60, a cleaning mechanism 70, and two sets of straightening mechanisms 80. The clamping wheels 20, upper guide wheels 30, lower guide wheels 40, and upper bending wheels 50 are all mounted on the frame 10. The drive mechanism 60 is mounted on the frame 10 and is used to drive the clamping wheels 20, upper guide wheels 30, lower guide wheels 40, and upper bending wheels 50 to rotate. The cleaning mechanism 70 is mounted on the frame 10 and located at the feed end of the clamping wheels 20. The two sets of straightening mechanisms 80 are mounted on the frame 10 and located in the area between the discharge end of the cleaning mechanism 70 and the feed end of the clamping wheels 20.

[0032] Specifically, the frame 10 is a welded or assembled steel structure, providing sufficient rigidity and stability. Pairs of clamping wheels 20 are used to clamp and transport the workpiece to be bent, which is a metal tube or strip. Upper guide wheels 30 and lower guide wheels 40 jointly guide the direction of travel of the workpiece. The upper bending wheel 50 is a key component for performing the bending action, working in conjunction with the upper guide wheels 30 and lower guide wheels 40 to bend the workpiece. The drive mechanism 60 provides power to the entire system. The newly added cleaning mechanism 70 cleans the surface of the workpiece before it enters the main processing area, preventing oxide scale, oil, or impurities from affecting product quality and damaging the mold. Two sets of straightening mechanisms 80 straighten the workpiece in both horizontal and vertical directions, ensuring it enters the bending station with an ideal posture. In addition, the outer circumferential surfaces of the clamping wheel 20, the upper guide wheel 30, the lower guide wheel 40, and the upper bending wheel 50 are provided with annular groove structures, which can prevent the bent part from deviating during the clamping process, ensure the clamping effect, and also play a limiting role.

[0033] This bending machine significantly improves the initial quality of the workpiece by integrating cleaning and bidirectional correction functions, laying a solid foundation for subsequent high-precision bending and forming. It is particularly suitable for processing applications with high requirements for bending accuracy and surface quality.

[0034] See Figure 1In one embodiment of this application, in order to flexibly adjust the height of different wheel sets to accommodate bending parts of different diameters or materials, the frame 10 is provided with a plurality of opening slots 11, and vertical rails 12 are provided on both vertical sides of each opening slot 11. A sliding seat 13 is slidably installed on each of the two vertical rails 12 of each opening slot 11. Any one of the upper guide wheel 30, the upper bending wheel 50 and a pair of mutually cooperating clamping wheels 20 is rotatably installed on the corresponding sliding seat 13. A fixing plate 14 is provided on the opening of all the opening slots 11, and a screw 15 is screwed through the fixing plate 14. One end of the screw 15 is rotatably connected to the corresponding sliding seat 13, and a handwheel 16 is provided on the other end of the screw 15. Rotating the handwheel 16 drives the screw 15 to rotate. Since the screw 15 is threaded into the fixed plate 14, it drives the sliding seat 13 and its wheel assembly to move up and down along the vertical rail 12, achieving stepless fine adjustment of the height. This, in turn, allows for adjustment of the clamping distance between the pair of clamping wheels 20 and between the upper guide wheel 30 and the lower guide wheel 40, adapting to parts of different diameters to be bent. Simultaneously, adjusting the position of the upper bending wheel 50 also adjusts the bending radius of the part. Once adjusted, the fixed plate 14 and the screw 15 work together to lock the workpiece in place.

[0035] See Figure 1 and Figure 2 To facilitate transmission and address the issues arising from position adjustments of the upper guide wheel 30, upper bending wheel 50, and a pair of cooperating clamping wheels 20, in one embodiment of this application, the drive mechanism 60 includes a drive motor 61 and a chain 62. The drive motor 61 is mounted within the frame 10. Each pair of clamping wheels 20, upper guide wheel 30, lower guide wheel 40, and upper bending wheel 50 is equipped with a sprocket that cooperates with the chain 62. The chain 62 is wound around the output end of the drive motor 61. The drive motor 61 synchronously transmits power to each moving component through the chain 62 and sprockets, ensuring coordinated clamping, guiding, and bending actions, high transmission efficiency, and a compact structure. The design of the chain 62 also addresses the issue of transmission distance changes caused by position adjustments of the upper guide wheel 30, upper bending wheel 50, and clamping wheels 20. In actual use, the clamping wheel 20, upper guide wheel 30, and upper bending wheel 50 can be adjusted in position on the frame 10. This may cause the chain 62 to loosen in its engagement with the sprockets on these structures. Therefore, in one embodiment of this application, a special adjusting sprocket is designed to adjust the chain tension. A structure is also designed in which a fixing plate 14 and a screw 15 cooperate to adjust the position of the adjusting sprocket. This drives the adjusting sprocket to adjust its position, so that no matter how the operator adjusts the position of the clamping wheel 20, upper guide wheel 30, and upper bending wheel 50 on the frame 10, the chain 62 can be tensioned through the structure of the fixing plate 14 and the screw 15, ensuring the compactness of the transmission.

[0036] See Figure 1 and Figure 3 In one embodiment of this application, the cleaning mechanism 70 includes a triangular frame 71 and roller brushes 72 rotatably disposed on the inner side of the triangular frame 71. The triangular frame 71 is mounted on the frame 10, and the workpiece to be bent can move through the triangular structure formed by all the roller brushes 72. The three roller brushes 72 are arranged in a triangle, surrounding the workpiece to be bent from multiple directions. When it passes through, the workpiece to be bent will drive the roller brushes 72 to rotate, and the rotating roller brushes 72 can effectively remove surface impurities such as oxide scale, rust, and oil stains. The triangular frame 71 has a stable structure and a large coverage area. Of course, in some embodiments, the roller brushes 72 can be driven by an external power system, such as a motor.

[0037] To absorb potential vibrations and positional deviations when the workpiece enters the cleaning mechanism, an elastic connecting block 73 is provided on the triangular frame 71. The elastic connecting block 73 is deformable and is mounted on the frame 10. The elastic connecting block 73 can be made of elastic materials such as rubber or polyurethane, giving the triangular frame 71 and the roller brush 72 on it a certain degree of floating ability, better adapting to the workpiece to be bent, and avoiding jamming or excessive wear.

[0038] See Figure 1 , Figure 4 , Figure 5 and Figure 6 To facilitate the straightening of the workpiece to be bent, in one embodiment of this application, both sets of straightening mechanisms 80 include a bracket 81, a pair of bearing wheels 82, an adjusting cylinder 83, a top pressure column 84, a lever block 85, and a top pressure wheel 86. The pair of bearing wheels 82 are rotatably mounted on the bracket 81. The adjusting cylinder 83 is mounted on the bracket 81. The top pressure column 84 is movably inserted into the bracket 81. One end of the top pressure column 84 is hinged to a lever block 85, one end of which is hinged to the bracket 81, and the other end is hinged to the telescopic end of the adjusting cylinder 83. The other end of the top pressure column 84 is provided with a rotatable top pressure wheel 86. The top pressure wheel 86 is located in the area between the two bearing wheels 82 and cooperates with the two bearing wheels 82 to clamp and feed the workpiece to be bent. Crucially, the rotation axes of the two top pressure wheels 86 on the two straightening mechanisms 80 are perpendicular to each other. This structure allows one set of straightening mechanisms 80 to straighten the workpiece vertically, while the other set straightens it horizontally, thus achieving comprehensive correction of initial bending or offset. The adjusting cylinder 83 amplifies the force through the lever block 85, driving the top pressure column 84 and top pressure wheel 86 to precisely press against the workpiece. The pressure is controllable, the straightening effect is stable, and the impact of the workpiece on the adjusting cylinder 83 is reduced.

[0039] See Figure 5In the above embodiment, to facilitate the installation and replacement of the top pressure wheel 86, a mounting base 87 is provided on one end of the non-hinged lever block 85 of the top pressure column 84, and the top pressure wheel 86 is rotatably mounted on the mounting base 87. The mounting base 87 can mount the top pressure wheel 86 through bearings to ensure its flexible rotation.

[0040] To ensure the stability of the movement trajectory of the pressure roller 86 and prevent it from shifting under pressure, a guide post 8a is provided on the bracket 81, and the mounting base 87 is slidably mounted on the guide post 8a. The guide post 8a provides precise guidance for the mounting base 87, ensuring that it can only move smoothly in a preset direction.

[0041] See Figure 6 Furthermore, in one embodiment of this application, in order to buffer the impact generated when the workpiece to be bent is irregular or passes at high speed and to improve the adaptability of the equipment, a connecting cylinder 88 is provided on the mounting base 87 corresponding to the straightening mechanism 80 near the cleaning mechanism 70. One end of the top pressure column 84 is movably inserted into the connecting cylinder 88 and can rotate relative to the connecting cylinder 88. A shock-absorbing spring 89 is provided inside the connecting cylinder 88, and the two ends of the shock-absorbing spring 89 are respectively connected to the end of the top pressure column 84 and the bottom of the connecting cylinder 88. The shock-absorbing spring 89 provides elastic buffering, allowing the top pressure roller 86 to adapt to the shape fluctuation of the workpiece to be bent within a certain range, reducing rigid impact, protecting the equipment and improving the straightening effect. At the same time, the shock-absorbing spring 89 can also absorb the torsional force in other directions of the mounting base 87, so that the top pressure roller 86 on the mounting base 87 automatically conforms to the bending situation of the workpiece to be bent at a certain angle, avoiding hard impact between the top pressure roller 86 and the bending area of ​​the workpiece to be bent, which can straighten the workpiece to be bent to a certain extent while protecting the top pressure roller 86. However, the mounting base 87 on the straightening mechanism 80, which is away from the cleaning mechanism 70, does not need to be like this. In this case, a top pressure wheel 86 with a predetermined rotation direction is needed to straighten the bent part.

[0042] In actual operation, the workpiece to be bent first passes through the cleaning mechanism 70, where three rotating roller brushes 72 remove impurities from its surface from multiple directions. Subsequently, the workpiece passes through two sets of straightening mechanisms 80. The adjusting cylinder 83 of the first straightening mechanism 80 drives the top pressure column 84 via the lever block 85, causing the top pressure roller 86 to press vertically against the workpiece, cooperating with the two bearing rollers 82 below to correct its vertical bending. Next, the workpiece enters the second straightening mechanism 80, where the top pressure roller 86 presses horizontally against it, cooperating with the two bearing rollers 82 on the side to correct its horizontal deviation. After cleaning and bidirectional straightening, the workpiece in good condition is clamped by the clamping roller 20 and fed into the bending area formed by the guide roller and the upper bending tube roller 50, where it is precisely bent into a circle under the drive mechanism 60. The operator can adjust the height of the upper guide roller 30, the upper bending tube roller 50, or the clamping roller 20 via the handwheel 16 to adapt to different processing requirements.

[0043] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A bending machine, comprising a frame (10), a plurality of pairs of clamping wheels (20), upper guide wheels (30), lower guide wheels (40), and upper bending wheels (50) arranged on the frame (10), wherein a driving mechanism (60) is provided on the frame (10), the driving mechanism (60) being capable of driving the clamping wheels (20), upper guide wheels (30), lower guide wheels (40), and upper bending wheels (50) to rotate, characterized in that, A cleaning mechanism (70) is provided on the end of the frame (10) where the feeding wheel (20) is located. Two sets of straightening mechanisms (80) are provided in the area between the discharge end of the cleaning mechanism (70) and the feeding end of the feeding wheel (20) on the frame (10). Both sets of straightening mechanisms (80) include a bracket (81), a pair of bearing wheels (82) rotatably mounted on the bracket (81), and an adjusting cylinder (83) mounted on the bracket (81). A top pressure column (84) is movably inserted into the bracket (81). One end of the top pressure column (84) is hinged to a lever block (85), one end of the lever block (85) is hinged to the bracket (81), and the other end of the lever block (85) is hinged to the telescopic end of the adjusting cylinder (83). The other end of the top pressure column (84) is provided with a rotatable top pressure wheel (86). The top pressure wheel (86) is located in the area between the two bearing wheels (82) and cooperates with the two bearing wheels (82) to clamp the workpiece to be bent. The rotation axes of the two top pressure wheels (86) on the two straightening mechanisms (80) are perpendicular to each other.

2. A bending machine according to claim 1, characterized in that: The top pressure column (84) has a mounting base (87) on one end of the non-hinged lever block (85), and the top pressure wheel (86) is rotatably mounted on the mounting base (87).

3. A bending machine according to claim 2, characterized in that: A connecting cylinder (88) is provided on the mounting base (87) corresponding to the correction mechanism (80) on the side near the cleaning mechanism (70). One end of the top pressure column (84) is movably inserted into the connecting cylinder (88) and can rotate relative to the connecting cylinder (88). A shock-absorbing spring (89) is provided inside the connecting cylinder (88). The two ends of the shock-absorbing spring (89) are respectively connected to the end of the top pressure column (84) and the bottom of the connecting cylinder (88).

4. A bending machine according to claim 2, characterized in that: The bracket (81) is provided with a guide post (8a), and the mounting base (87) is slidably mounted on the guide post (8a).

5. A bending machine according to claim 1, characterized in that: The cleaning mechanism (70) includes a triangular frame (71) and roller brushes (72) rotatably disposed on the inner side of the triangular frame (71). The triangular frame (71) is mounted on the frame (10), and the workpiece to be bent can move through the triangular structure formed by all the roller brushes (72).

6. A bending machine according to claim 5, characterized in that: The triangular frame (71) is provided with an elastic connecting block (73), which is deformable and is installed on the frame (10).

7. A bending machine according to claim 1, characterized in that: The frame (10) is provided with a plurality of opening slots (11). Vertical rails (12) are provided on both sides of the opening slots (11). Sliding seats (13) are slidably installed on the two vertical rails (12) of each opening slot (11). Any one of the upper guide wheel (30), the upper bending tube wheel (50) and a pair of mutually cooperating clamping wheels (20) can be rotatably installed on the corresponding sliding seat (13). A fixing plate (14) is provided on the opening of all the opening slots (11). A screw (15) is screwed through the fixing plate (14). One end of the screw (15) is rotatably connected to the corresponding sliding seat (13). A handwheel (16) is provided on the other end of the screw (15).

8. A bending machine according to any one of claims 1-7, characterized in that: The drive mechanism (60) includes a drive motor (61) and a chain (62). The drive motor (61) is installed inside the frame (10). Each pair of clamping wheels (20), upper guide wheels (30), lower guide wheels (40) and upper bending tube wheels (50) is provided with a sprocket that cooperates with the chain (62). The chain (62) is wound around the output end of the drive motor (61).

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