Rolling mill bending device

Abstract

The utility model relates to the field of steel pipe bending discloses rolling mill bending device, including bed, conveying mechanism and bending mechanism, conveying mechanism and bending mechanism are installed in the top of bed along the length direction of bed in proper order, conveying mechanism includes upper guide roller subassembly and lower guide roller subassembly, and the passage that wire material passes through is formed between upper guide roller subassembly and lower guide roller subassembly, and upper guide roller subassembly is slidably installed on the bed, and lower guide roller subassembly installs the top of bed, lower guide roller subassembly includes at least one group of driving roller and driven roller, and driving roller and driven roller are installed on the top of bed, upper guide roller subassembly includes first transmission roller and second transmission roller, and first transmission roller and second transmission roller are slidably installed on the bed through sliding subassembly, and driving roller, first transmission roller and second transmission roller are sequentially installed with driving sprocket, clutch and first motor along the width direction of bed.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe bending, and specifically to a rolling mill bending device. Background Technology

[0002] In the field of copper tube deep processing, bending is a key process for achieving specific shapes and sizes of copper tubes, and its quality directly affects the accuracy of subsequent assembly and the performance of the product. Through precise bending, copper tubes can meet the pipeline routing requirements of different application scenarios such as air conditioning, refrigeration equipment, and hydraulic systems. At the same time, it enhances the structural stability of copper tubes under complex working conditions and reduces resistance losses during fluid transportation. It is one of the core links to improve the added value and market adaptability of copper tube products.

[0003] Traditional copper tube bending devices typically consist of a base, a conveying mechanism, and a bending mechanism. The conveying mechanism, as the core of power transmission, mainly comprises upper and lower guide roller assemblies. The lower guide roller assembly usually has a drive component, while the upper guide roller assembly uses springs or pneumatic devices to press the copper tube to enhance friction. A conveying channel is formed between the guide roller assemblies for the copper tube to pass through. Its working principle is as follows: the drive component rotates the lower guide roller, and the friction between the lower guide roller and the copper tube surface drives the copper tube forward along the channel. Simultaneously, the advancing copper tube drives the upper guide roller to rotate due to friction. When the copper tube reaches the bending mechanism, the bending mechanism uses die extrusion or roller pressing to plastically deform the copper tube, ultimately completing the bending process with the preset curvature, transforming the copper tube from a straight shape to the target curved shape. However, a unilateral drive component makes the force on the copper tube uneven, leading to slippage during the initial conveying stage. This not only affects conveying efficiency but may also cause scratches or tensile deformation on the copper tube surface due to uneven force. Utility Model Content

[0004] The present invention aims to provide a rolling mill bending device to solve the problem that the copper tube slips during the initial conveying stage due to insufficient initial power, which in turn causes scratches or tensile deformation on the surface of the copper tube.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A rolling mill bending device includes a mill base, a conveying mechanism, and a bending mechanism. The conveying mechanism and the bending mechanism are sequentially installed on the top of the mill base along its length. The conveying mechanism includes an upper guide roller assembly and a lower guide roller assembly, forming a channel for wire to pass through. The upper guide roller assembly is slidably installed on the mill base, and the lower guide roller assembly is installed on the top of the mill base. The lower guide roller assembly includes at least one set of driving rollers and driven rollers, both of which are installed on the top of the mill base. The upper guide roller assembly includes a first drive roller and a second drive roller, which are slidably installed on the mill base via sliding assemblies. A drive sprocket, a clutch, and a first motor are sequentially installed on the driving roller, the first drive roller, and the second drive roller along the width of the mill base.

[0006] Beneficial effects: 1. By equipping the drive roller, the first drive roller, and the second drive roller with independent motors, the three rollers start simultaneously, providing a large initial traction force to the copper tube. This ensures that the copper tube can overcome static friction and accelerate evenly, effectively preventing slippage or stretching deformation. Furthermore, the clutch allows for no-load starting of the motors, reducing starting current surges. After the copper tube is running stably, the motors of the first and second drive rollers can be shut off, making them driven components that are idled by the copper tube. This significantly reduces energy consumption during long-term operation of the equipment and saves costs.

[0007] 2. The first and second drive rollers are adjustable via a sliding assembly, making it easy to adapt to different pipe diameters. This allows the device to quickly adapt to the production of copper pipes of different specifications, meeting the flexible needs of multiple varieties and small batches, and increasing the versatility of the device.

[0008] 3. The driven roller adopts passive synchronous drive, which means that the driven roller does not need an additional motor and can obtain power from the driving roller. This saves the use of a drive motor, reduces the equipment manufacturing cost and long-term energy consumption, and the device has a clear structure and a high degree of modularity, making it easy to install, debug and maintain.

[0009] Preferably, as a further improvement, the bending mechanism includes an upper pressure roller, a lower pressure roller, and a lifting assembly. The driven sprocket connected to the upper pressure roller is connected to the driving sprocket on the second transmission roller via a synchronous belt, and the upper pressure roller and the second transmission roller are mounted on the same sliding assembly. The lower pressure roller is slidably connected to the machine base via the lifting assembly.

[0010] Beneficial effects: The distance between the upper and lower pressure rollers of the bending mechanism can be precisely adjusted to regulate the roundness of the copper tube. Combined with the adjustable first and second drive rollers via a sliding assembly, this facilitates adaptation to different tube diameters, enabling the device to quickly adapt to the production of copper tubes of various specifications. This meets the flexible needs of producing multiple varieties in small batches, increasing the device's versatility. Secondly, the synchronous rotation of the second drive roller and the upper pressure roller eliminates the need for an additional motor for the upper pressure roller, allowing it to obtain power from the second drive roller via a synchronous belt. This simplifies the drive structure, reduces manufacturing costs, and saves energy. Furthermore, it ensures stable conveying, effectively preventing the copper tube from sliding or being deformed by compression between the rollers, while also ensuring the continuity of traction force at the bending point.

[0011] Preferably, as a further improvement, the lifting assembly includes a second motor, a lead screw, and a moving part; a first support part is fixedly connected to the base, the first support part forms a limiting groove along the height direction of the base, the lead screw is rotatably installed in the limiting groove, and one end passes through the first support part and is connected to the second motor, the second motor is installed at the top of the first support part, one end of the moving part is slidably installed on the lead screw, and the other end is connected to the lower pressure roller through a bearing seat.

[0012] Beneficial effects: The servo motor can precisely control the rotation angle, which is converted into precise linear displacement through the lead screw. This allows for precise control of the lifting distance of the lower pressure roller at the micrometer level, meeting the high precision requirements for the bending radius of the copper tube. Secondly, the lead screw mechanism has excellent self-locking characteristics. When the motor stops, the position of the lower pressure roller can be firmly locked and will not change due to external forces, ensuring the absolute stability of bending parameters during production and guaranteeing the consistency of product quality.

[0013] Preferably, as a further improvement, the moving part includes an integrally formed connecting part and a sliding part. The connecting part is connected to the lead screw, and the side of the sliding part away from the connecting part is connected to the lower pressure roller. Guide rails are provided on both sides of the first support part away from the limiting groove, and first sliders are formed on both sides of the sliding part. The first sliders are slidably connected to the first guide rails.

[0014] Beneficial effects: Based on the main drive and guidance provided by the lead screw, the auxiliary guiding system of the first slider and the first guide rail is added, which greatly enhances the rigidity and stability of the moving parts and the lower pressure roller during the lifting process, prevents the lower pressure roller from tilting or shaking slightly, and distributes the guiding function to the slider and the guide rail, reducing the lateral force on the lead screw thread, reducing the wear of the lead screw, and extending the service life of the entire lifting mechanism.

[0015] Preferably, as a further improvement, the sliding assembly includes a connector and a drive member for driving the connector to move along the height direction of the machine base. The upper pressure roller and the second transmission roller are both mounted on the connector. A second support is fixedly connected to the machine base. The second support includes an integrally formed guide block and a support block. The connector is mounted on the support block through the drive member. A second slider is provided on the side of the connector away from the upper pressure roller. A second guide rail is provided on the side of the guide block close to the support block. The second slider is slidably connected to the second guide rail.

[0016] Beneficial effects: The connecting parts can be easily moved up and down by the drive component, thereby quickly adjusting the height of the second drive roller and the upper pressure roller to accommodate copper tubes of different diameters, greatly improving the equipment's versatility and production changeover efficiency. Furthermore, by mounting the upper pressure roller and the second drive roller on the same connecting part, linkage lifting is achieved, ensuring that the relative position of the upper pressure roller and the second drive roller remains unchanged when adjusting the conveying gap. This automatically maintains the geometric relationship of the bending mechanism, guaranteeing the stability and consistency of the bending process, eliminating the need for recalibration, and simplifying operation. Secondly, the guide block and support block adopt an integrated molding structure, making the second support part a robust integral structure, eliminating potential deformation and fit errors in the connecting parts of a split design, providing a strong rigid foundation for the entire sliding assembly, and preventing the second support part from tilting when the copper tube passes through the upper pressure roller and the second drive roller.

[0017] Preferably, as a further improvement, a third support is fixedly connected to the base, and a sliding assembly connected to the first transmission roller is connected to the third support. The first transmission roller is mounted on the connector, and a cavity is formed inside the third support. The driving component inside the sliding assembly is installed inside the cavity. A third guide rail is also provided on the third support, and a third slider is provided on the side of the connector near the third support. The third slider is slidably connected to the third guide rail.

[0018] Beneficial effects: The cooperation between the third guide rail and the third slider provides rigid and stable vertical guidance, ensuring that the first drive roller can only move along the preset vertical trajectory during the lifting process without any shaking or deviation, thereby ensuring the uniformity of the gap between it and the lower drive roller. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0020] Figure 2 This is a structural diagram of the back of an embodiment of the present invention.

[0021] Figure 3 This is a front view of an embodiment of the present utility model.

[0022] Figure 4 This is a top view of an embodiment of the present utility model.

[0023] Figure 5 This is a left view of an embodiment of the present utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the second transmission roller in an embodiment of this utility model.

[0025] Figure 7 This is a schematic diagram of the structure of the first transmission roller in an embodiment of this utility model.

[0026] The reference numerals in the accompanying drawings include: base 1, first support 11, limiting groove 111, second support 12, guide block 121, support block 122, third support 13, cavity 131, conveying mechanism 2, driving roller 21, driven roller 22, first transmission roller 23, second transmission roller 24, bending mechanism 3, upper pressure roller 31, lower pressure roller 32, lifting assembly 33, second motor 331, lead screw 332, moving part 333, sliding assembly 4, driving part 41, connecting part 42, first motor 5, clutch 6, driving sprocket 7, driven sprocket 8, synchronous belt 9. Detailed Implementation

[0027] The following detailed description illustrates the specific implementation method: The implementation examples are basically as follows Figures 1-7 As shown: This embodiment provides a rolling mill bending device for connection to a copper tube rolling mill. A bending guide rail is provided behind the device to allow the rolled and bent copper tube to move upwards under the action of the copper tube rolling mill and the rolling mill bending device, and to wind around a top-mounted winding arm. Figures 1-6As shown, the machine includes a base 1, a conveying mechanism 2, and a bending mechanism 3. The conveying mechanism 2 and the bending mechanism 3 are sequentially installed on the top of the base 1 along its length. The conveying mechanism 2 includes an upper guide roller assembly and a lower guide roller assembly, forming a channel for the wire to pass through between the upper guide roller assembly and the lower guide roller assembly. The upper guide roller assembly is slidably installed on the base 1, and the lower guide roller assembly is installed on the top of the base 1. The lower guide roller assembly includes at least one set of driving rollers 21 and driven rollers 22. In this embodiment, there is one set. Both the driving rollers 21 and driven rollers 22 are installed on the top of the base 1 through bearing seats. The upper guide roller assembly includes a first transmission roller 23 and a second transmission roller 24. The first transmission roller 23 and the second transmission roller 24 are slidably installed on the base 1 through a sliding assembly 4, so that the first transmission roller 23 and the second transmission roller 24 move closer to or further away from the driving roller 21 and the driven roller 22 under the action of the sliding assembly 4, thereby adjusting the distance between them to adapt to the rolled wire. Specifically, the sliding assembly 4 includes a connector 42 and a drive component 41 for driving the connector 42 to move along the height direction of the base 1. In this embodiment, the drive component 41 is a cylinder. The upper pressure roller 31 and the second transmission roller 24 are both mounted on the connector 42 through bearing seats. A second support part 12 is fixedly connected to the base 1. The second support part 12 includes an integrally formed guide block 121 and a support block 122. The connector 42 is connected to the piston rod of the cylinder. The cylinder is mounted on the support block 122 by bolts. A second slider is provided on the side of the connector 42 away from the upper pressure roller 31. A second guide rail is provided on the side of the guide block 121 close to the support block 122. The second slider is slidably connected to the second guide rail. A third support part 13 is also fixedly connected to the base 1. The sliding component 4 connected to the first transmission roller 23 is connected to the third support part 13. The first transmission roller 23 is mounted on the connector 42 through a bearing seat. A cavity 131 is formed inside the third support part 13. The drive component 41 is installed inside the cavity 131. A third guide rail is also provided on the third support part 13. A third slider is provided on the side of the connector 42 near the third support part 13. The third slider is slidably connected to the third guide rail.

[0028] like Figure 7 As shown, in this embodiment, the drive roller 21, the first transmission roller 23, and the second transmission roller 24 are sequentially mounted with a drive sprocket 7, a clutch 6, and a first motor 5 along the width direction of the machine base 1. Specifically, the clutch 6 is a centrifugal clutch 6, which includes a drive component, a centrifugal body, and a driven component. The centrifugal body is slidably mounted on the drive component, and the first motor 5 drives the drive component to rotate and accelerate, thus throwing the centrifugal body radially out. When the drive component reaches a specified angular velocity, the thrown centrifugal body presses against the inner wall of the driven component, and the friction force forces the driven component into a motion state to transmit torque.

[0029] like Figure 1 and Figure 3As shown, both the driving roller 21 and the driven roller 22 are connected to the machine base 1 by bearing seat bolts. Since the driven roller 22 is coaxially connected to the driven sprocket 8 and the driving roller 21 is connected to the driving sprocket 7, and the driven sprocket 8 and the driving sprocket 7 are connected by a synchronous belt 9, the synchronous rotation of the driving roller 21 and the driven roller 22 is realized, which reduces the power supply setting for driving the driven roller 22 and saves energy consumption.

[0030] like Figure 1 As shown, the bending mechanism 3 includes an upper pressure roller 31, a lower pressure roller 32, and a lifting assembly 33. The upper pressure roller 31 is synchronously connected to the second transmission roller 24. In this embodiment, as shown... Figure 4 and Figure 6 As shown, the upper pressure roller 31 is coaxially connected to a driven sprocket 8, and the second transmission roller 24 is coaxially connected to a driving sprocket 7. The driving sprocket 7 and the driven sprocket 8 are connected by a synchronous belt 9 to achieve synchronous rotation of the upper pressure roller 31 and the second transmission roller 24. The upper pressure roller 31 is mounted on the connecting piece 42 connected to the second transmission roller 24 via a bearing seat, and moves synchronously with the second transmission roller 24 along the height direction of the machine base 1. It is worth noting that in this embodiment, the connecting piece 42 connecting the upper pressure roller 31 and the second transmission roller 24 moves synchronously with the connecting piece 42 connecting the first transmission roller 23, so that the first transmission roller 23, the second transmission roller 24, and the upper pressure roller 31 remain on the same horizontal plane.

[0031] like Figure 5 As shown, the lower pressure roller 32 is connected to the lifting assembly 33, which includes a second motor 331, a lead screw 332, and a moving part 333. In this embodiment, the second motor 331 is a servo motor to adjust the moving distance of the lower pressure roller 32, thereby meeting the bending accuracy requirements of the copper tube. A first support part 11 is fixedly connected to the machine base 1. The first support part 11 forms a limiting groove 111 along the height direction of the machine base 1. The lead screw 332 is rotatably installed in the limiting groove 111, and one end passes through the first support part 11 and is connected to the second motor 331. The second motor 331 is installed at the top of the first support part 11. One end of the moving part 333 is slidably installed on the lead screw 332, and the other end is connected to the lower pressure roller 32 through a bearing seat. Specifically, as shown... Figure 2 As shown, the moving part 333 includes an integrally formed connecting part and a sliding part. The connecting part is connected to the lead screw 332, and the side of the sliding part away from the connecting part is connected to the lower pressure roller 32. The first support part 11 is provided with first guide rails on both sides away from the limiting groove 111, and first sliders are formed on both sides of the sliding part. The first sliders are slidably connected to the first guide rails.

[0032] The working principle of the above-mentioned device is as follows: 1. Based on the required diameter of the copper tube to be bent, the connecting part 42 is slid by the driving part 41 on the sliding assembly 4, which in turn drives the first transmission roller 23 to move closer to or away from the lower driving roller 21 and the second transmission roller 24 to move closer to or away from the lower driven roller 22, until the gap between the driving roller 21 and the first transmission roller 23, and between the driven roller 22 and the second transmission roller 24, exactly matches the diameter of the copper tube, thus preventing the copper tube from shifting or being deformed by pressure during transportation. Then, the second motor 331 in the lifting assembly 33 drives the lead screw 332 to rotate. Since the connecting part of the moving part 333 is T-shaped and adapted to the limiting groove 131, it can prevent the connecting part from rotating synchronously with the lead screw 332, and only move up and down along the axial direction of the lead screw 332. The connecting part drives the sliding part to move synchronously, and the sliding part slides stably along the first guide rail of the third support through the first slider, thereby driving the lower pressure roller 32 to move up and down until the angle between the lower pressure roller 32 and the upper pressure roller 31 meets the bending radius requirement of the copper tube.

[0033] 2. Before the rolled copper tube is output from the copper tube rolling mill and enters the bending device of the mill, the first motor 5 is started, so that the drive roller 21, the first transmission roller 23 and the second transmission roller 24 can provide power for the copper tube to be conveyed, so that the copper tube can be conveyed forward smoothly. Since the upper pressure roller 31 and the second transmission roller 24 rotate synchronously, they provide forward traction force for the copper tube. The lower pressure roller 32 is kept at a fixed height under the support of the lifting component 33, forming a specific bending channel with the upper pressure roller 31. Under the action of traction force, the copper tube passes between the upper pressure roller 31 and the lower pressure roller 32. Under the squeezing and guiding action of the upper pressure roller 31 and the lower pressure roller 32, it gradually forms a set radius bending state. Under the continuous traction force of the conveying mechanism 2 and the action of the copper tube rolling mill, the bent copper tube moves upward along the bending guide rail and is finally wound on the winding arm at the top of the device. After the bent copper tube has been on the winding arm for a period of time, the first motor 5 connected to the first drive roller 23 and the second drive roller 24 can be turned off because the copper tube rolling mill can continuously provide conveying force to the copper tube. This changes the first drive roller 23 and the second drive roller 24 from actively providing power to being driven to rotate, thereby saving energy.

[0034] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A rolling mill bending device, characterized in that: The system includes a base, a conveying mechanism, and a bending mechanism. The conveying mechanism and the bending mechanism are sequentially installed on the top of the base along its length. The conveying mechanism includes an upper guide roller assembly and a lower guide roller assembly, with a channel for wire to pass through formed between the upper and lower guide roller assemblies. The upper guide roller assembly is slidably installed on the base, and the lower guide roller assembly is installed on the top of the base. The lower guide roller assembly includes at least one set of driving rollers and driven rollers, both of which are installed on the top of the base. The upper guide roller assembly includes a first transmission roller and a second transmission roller, which are slidably installed on the base via sliding assemblies. The driving roller, the first transmission roller, and the second transmission roller are coaxially connected to a driving sprocket, a clutch, and a first motor, respectively.

2. The rolling mill bending device according to claim 1, characterized in that: The bending mechanism includes an upper pressure roller, a lower pressure roller, and a lifting assembly. The driven sprocket connected to the upper pressure roller is connected to the driving sprocket on the second transmission roller via a synchronous belt. The upper pressure roller and the second transmission roller are mounted on the same sliding assembly. The lower pressure roller is slidably connected to the machine base via the lifting assembly.

3. The rolling mill bending device according to claim 2, characterized in that: The lifting assembly includes a second motor, a lead screw, and a moving part; a first support is fixedly connected to the base, and a limit groove is opened in the first support along the height direction of the base. The lead screw is rotatably installed in the limit groove, and one end passes through the first support and is connected to the second motor. The second motor is installed at the top of the first support. One end of the moving part is slidably installed on the lead screw, and the other end is connected to the lower pressure roller through a bearing seat.

4. The rolling mill bending device according to claim 3, characterized in that: The moving part includes an integrally formed connecting part and a sliding part. The connecting part is connected to the lead screw, and the side of the sliding part away from the connecting part is connected to the lower pressure roller. The first support part is provided with first guide rails on both sides away from the limiting groove, and first sliders are formed on both sides of the sliding part. The first sliders are slidably connected to the first guide rails.

5. The rolling mill bending device according to claim 1, characterized in that: The sliding assembly includes a connector and a drive component for driving the connector to move along the height direction of the machine base. The upper pressure roller and the second transmission roller are both mounted on the connector. A second support is fixedly connected to the machine base. The second support includes an integrally formed guide block and a support block. The connector is mounted on the support block through the drive component. A second slider is provided on the side of the connector away from the upper pressure roller. A second guide rail is provided on the side of the guide block close to the support block. The second slider is slidably connected to the second guide rail.

6. The rolling mill bending device according to claim 5, characterized in that: A third support is also fixedly connected to the base. The sliding component connected to the first transmission roller is connected to the third support. The first transmission roller is mounted on the connector. A cavity is formed inside the third support. The driving component inside the sliding component is mounted inside the cavity. A third guide rail is also provided on the third support. A third slider is provided on the side of the connector near the third support. The third slider is slidably connected to the third guide rail.

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