A mandrel-less tube bending device

Abstract

This utility model relates to the technical field of round tube bending, and in particular to a mandrel-less round tube bending device. When bending a round tube, it can preheat the bending portion, improving the plasticity of the bending portion, reducing its hardness, and preventing cracking during the bending process. It is convenient to use and has high reliability and practicality. The device includes a base plate; it also includes a moving mechanism, a rotating mechanism, a heating mechanism, a clamping mechanism, and a pressing mechanism. The rotating mechanism is mounted on the moving mechanism and is used to move the rotating mechanism left and right. The heating mechanism is mounted on the base plate and has a heating function. The clamping mechanism is located to the right of the heating mechanism, and the pressing mechanism is located to the right of the clamping mechanism and has a pressing function. The heating mechanism is located to the right of the rotating mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of round tube bending, and in particular to a round tube bending device without a mandrel. Background Technology

[0002] A round pipe bending device is a mechanism used to bend round pipes, and it has wide applications in the field of machining. In the prior art, a utility model patent with patent application number 202020554537.3 discloses a steel pipe bending device, which mainly consists of a punch, a die, and a frame. When bending a round pipe, the pipe is placed on the die, and then the punch descends, contacting the pipe during its descent and bending it. However, this device has the following problems: when encountering round pipes with thick walls and high hardness, due to their low plasticity, directly applying pressure to bend the pipe can easily cause cracking at the bend, resulting in significant damage and inconvenience. Therefore, a bending device that can increase the plasticity of round pipes is needed. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a mandrel-less tube bending device that can preheat the bending part of the round tube during bending, thereby improving the plasticity of the bending part, reducing the hardness, and preventing cracking during the bending process. It is convenient to use, reliable, and highly practical.

[0004] This utility model discloses a mandrel-less tube bending device, comprising a base plate; it also includes a moving mechanism, a rotating mechanism, a heating mechanism, a clamping mechanism, and a pressing mechanism. The rotating mechanism is mounted on the moving mechanism and is used to move the rotating mechanism left and right. The heating mechanism is mounted on the base plate and has a heating function. The clamping mechanism is located to the right of the heating mechanism, and the pressing mechanism is located to the right of the clamping mechanism and has a pressing function. The heating mechanism is located to the right of the rotating mechanism. When bending the round tube, the left end of the round tube is first clamped and fixed by the rotating mechanism. Then, the moving mechanism causes the rotating mechanism to move the round tube to the right, so that the first part of the round tube that needs to be bent is moved to the heating mechanism. The heating mechanism then heats the first section of the round tube that needs to be bent, reducing its hardness and increasing its plasticity under high temperature. The tube is then moved to the right until the bent section reaches the clamping mechanism, which supports and fixes it. A pressing mechanism then presses down on the right side of the bent section, causing it to bend. This process is repeated for the next section of the tube that needs bending. This method preheats the bent section, increasing its plasticity and reducing its hardness, thus preventing cracking during bending. It is convenient to use and highly reliable and practical.

[0005] Preferably, the moving mechanism includes an electric slide rail and a sliding plate. The electric slide rail is fixedly installed on the base plate, and the sliding plate is installed on the electric slide rail. The electric slide rail is used to move the sliding plate left and right. The rotating mechanism is installed on the upper end of the sliding plate. When the left part of the round tube is clamped and fixed by the rotating mechanism, the electric slide rail is opened. The electric slide rail drives the sliding plate to move left and right. The sliding plate drives the rotating mechanism to move in the left and right directions, thereby moving the round tube left and right. This moves the part of the round tube that needs to be bent to the heating mechanism for heating. Then, it continues to move to the right to the clamping mechanism for pressing and bending.

[0006] Preferably, the rotating mechanism includes a support plate, a stepper motor, a rotating shaft, and a three-jaw chuck. The support plate is fixedly mounted on the upper end of the sliding plate, the stepper motor is fixedly mounted on the support plate, the rotating shaft is rotatably mounted on the support plate, the left end of the rotating shaft is connected to the output end of the stepper motor, and the three-jaw chuck is fixedly mounted on the right end of the rotating shaft. When bending the round tube, the left part of the round tube is clamped and fixed by the three-jaw chuck, so that the first part of the round tube that needs to be bent is moved to the clamping mechanism for support. Then the round tube is bent. Afterward, the support plate continues to move to the right, which in turn causes the rotating shaft to drive the three-jaw chuck and the round tube to move to the right, so that the next part of the round tube that needs to be bent is moved to the clamping mechanism. Then the stepper motor is turned on, and the stepper motor drives the rotating shaft to rotate, which in turn causes the three-jaw chuck to drive the round tube to rotate, so that the round tube is rotated to a suitable bending angle. Then the round tube is pressed down to bend, which facilitates the bending of the round tube.

[0007] Preferably, the heating mechanism includes an electromagnetic heater and an electromagnetic heating coil. The electromagnetic heater is fixedly installed on the base plate, and the electromagnetic heating coil is provided on the electromagnetic heater. When bending the round tube, the part of the round tube that needs to be bent is first moved into the electromagnetic heating coil, and then the electromagnetic heating coil is turned on to heat the round tube, so that the bent part of the round tube is softened by heat, improving plasticity and facilitating the bending of the round tube.

[0008] Preferably, the clamping mechanism includes a hydraulic cylinder A, a push rod, a fixed frame, a support roller, a lifting frame, a hydraulic cylinder B, a lifting rod, and a pressure block. Hydraulic cylinder A is fixedly mounted on the base plate, and a push rod is provided at the output end of hydraulic cylinder A. The fixed frame is fixedly mounted on the upper end of the push rod. The support roller is rotatably mounted on the fixed frame. Hydraulic cylinder B is fixedly mounted on the upper end of the lifting frame. The lifting rod is slidably mounted on the lifting frame, and its upper end is connected to the output end of hydraulic cylinder B. The pressure block is fixedly mounted on the lower end of the lifting rod, and the pressure block is located above the support roller. The lifting frame is used to fix the lifting rod. Mounted on a bracket in the workshop; when bending a round tube, after the bending part of the tube is heated by the electromagnetic heating coil, the bending part of the tube moves to the right above the support roller. Then, hydraulic cylinder A is opened, causing the push rod to drive the fixed frame and support roller to rise, so that the support roller contacts the lower end of the round tube. Then, hydraulic cylinder B is opened, causing the lifting rod to drive the pressure block to fall, so that the pressure block contacts the upper end of the round tube. Then, the pressing mechanism is opened, so that the pressing mechanism presses down on the right side of the round tube, so that the bending part of the round tube bends at the support roller; this facilitates the bending of the round tube.

[0009] Preferably, the pressing mechanism includes a fixed frame, a cylinder, a sliding rod, a mounting plate, and a pressure roller. The cylinder is fixedly mounted on the upper end of the fixed frame, the sliding rod is slidably mounted on the fixed frame, the upper end of the sliding rod is connected to the output end of the cylinder, the mounting plate is fixedly mounted on the lower end of the sliding rod, and the pressure roller is rotatably mounted on the mounting plate, located to the right of the pressing block. The lifting frame is fixedly mounted on the support in the workshop. When bending the round tube, the cylinder is opened, and the cylinder causes the mounting plate to drive the pressure roller to descend through the sliding rod. During the descent, the pressure roller contacts the round tube and bends the round tube.

[0010] Preferably, the surfaces of the pressing block and the support roller are both provided with a high-temperature resistant coating; this feature improves the service life of the pressing block and the support roller.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: when bending a round tube, the bending part of the round tube can be heated in advance, which improves the plasticity of the bending part of the round tube, reduces the hardness, avoids cracking during the bending process, and is convenient to use, reliable and practical. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first isometric structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the second isometric structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the heating mechanism;

[0015] Figure 4 This is a schematic diagram of the pressing mechanism;

[0016] Figure 5 This is a schematic diagram of the clamping mechanism.

[0017] The following are labels in the attached diagram: 1. Base plate; 2. Electric slide rail; 3. Sliding plate; 4. Support plate; 5. Stepper motor; 6. Rotating shaft; 7. Three-jaw chuck; 8. Electromagnetic heater; 9. Electromagnetic heating coil; 10. Hydraulic cylinder A; 11. Push rod; 12. Fixing frame; 13. Support roller; 14. Lifting frame; 15. Hydraulic cylinder B; 16. Lifting rod; 17. Pressure block; 18. Fixing frame; 19. Cylinder; 20. Sliding rod; 21. Mounting plate; 22. Pressure roller; 23. Round tube. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0019] like Figures 1 to 5 The mandrel-less tube bending device of this utility model includes a base plate 1, a moving mechanism, a rotating mechanism, a heating mechanism, a clamping mechanism, and a pressing mechanism. The rotating mechanism is mounted on the moving mechanism and is used to move the rotating mechanism left and right. The heating mechanism is mounted on the base plate 1 and has a heating function. The clamping mechanism is located to the right of the heating mechanism, and the pressing mechanism is located to the right of the clamping mechanism and has a pressing function. The heating mechanism is located to the right of the rotating mechanism. When bending the round tube 23, the left end of the round tube 23 is first clamped and fixed by the rotating mechanism. Then, the moving mechanism drives the rotating mechanism to move the round tube 23 to the right, so that the first part of the round tube 23 that needs to be bent is moved to the heating mechanism. Then, the heating mechanism... The first section of the round tube 23 that needs to be bent is heated, which reduces the hardness and increases the plasticity of the bending section under high temperature. Then, the round tube 23 continues to move to the right, so that the bending section of the round tube 23 is moved to the clamping mechanism. The clamping mechanism then supports and fixes the bending section of the round tube 23. Then, the right side of the bending section of the round tube 23 is pressed down by the pressing mechanism to bend the round tube 23. Then, the next section of the round tube 23 that needs to be bent is heated and bent in the same way. When bending the round tube 23, the bending section of the round tube 23 can be heated in advance, which improves the plasticity of the bending section, reduces the hardness, and avoids cracking during the bending process. It is convenient to use and has high reliability and practicality.

[0020] like Figure 1 and Figure 2The moving mechanism includes an electric slide rail 2 and a sliding plate 3. The electric slide rail 2 is fixedly installed on the base plate 1, and the sliding plate 3 is installed on the electric slide rail 2. The electric slide rail 2 is used to move the sliding plate 3 left and right. The rotating mechanism is installed on the upper end of the sliding plate 3. When the left part of the round tube 23 is clamped and fixed by the rotating mechanism, the electric slide rail 2 is opened. The electric slide rail 2 drives the sliding plate 3 to move left and right. The sliding plate 3 drives the rotating mechanism to move in the left and right directions, thereby causing the round tube 23 to move left and right. This moves the part of the round tube 23 that needs to be bent to the heating mechanism for heating. Then it continues to move to the right to the clamping mechanism for pressing and bending.

[0021] like Figure 1 The rotating mechanism includes a support plate 4, a stepper motor 5, a rotating shaft 6, and a three-jaw chuck 7. The support plate 4 is fixedly mounted on the upper end of the sliding plate 3, the stepper motor 5 is fixedly mounted on the support plate 4, the rotating shaft 6 is rotatably mounted on the support plate 4, the left end of the rotating shaft 6 is connected to the output end of the stepper motor 5, and the three-jaw chuck 7 is fixedly mounted on the right end of the rotating shaft 6. When bending the round tube 23, the left part of the round tube 23 is clamped and fixed by the three-jaw chuck 7, so that the first part of the round tube 23 that needs to be bent is moved to the clamping machine. The support structure is then used to bend the round tube 23. The support plate 4 continues to move to the right, causing the rotating shaft 6 to drive the three-jaw chuck 7 and the round tube 23 to move to the right. This moves the next part of the round tube 23 that needs to be bent to the clamping mechanism. Then, the stepper motor 5 is activated, causing the rotating shaft 6 to rotate, which in turn causes the three-jaw chuck 7 to rotate the round tube 23 to a suitable bending angle. Finally, the round tube 23 is pressed down and bent, thus facilitating the bending of the round tube 23.

[0022] like Figure 1 and Figure 3 The heating mechanism includes an electromagnetic heater 8 and an electromagnetic heating coil 9. The electromagnetic heater 8 is fixedly installed on the base plate 1, and the electromagnetic heater 8 is provided with the electromagnetic heating coil 9. When bending the round tube 23, the part of the round tube 23 that needs to be bent is first moved into the electromagnetic heating coil 9, and then the electromagnetic heating coil 9 is turned on to heat the round tube 23, so that the bent part of the round tube 23 is softened by heat, improving plasticity and facilitating the bending of the round tube 23.

[0023] like Figure 1 and Figure 5The clamping mechanism includes a hydraulic cylinder A10, a push rod 11, a fixed frame 12, a support roller 13, a lifting frame 14, a hydraulic cylinder B15, a lifting rod 16, and a pressure block 17. The hydraulic cylinder A10 is fixedly mounted on the base plate 1, and the output end of the hydraulic cylinder A10 is equipped with the push rod 11. The fixed frame 12 is fixedly mounted on the upper end of the push rod 11. The support roller 13 is rotatably mounted on the fixed frame 12. The hydraulic cylinder B15 is fixedly mounted on the upper end of the lifting frame 14. The lifting rod 16 is slidably mounted on the lifting frame 14, and its upper end is connected to the output end of the hydraulic cylinder B15. The pressure block 17 is fixedly mounted on the lower end of the lifting rod 16 and is located above the support roller 13. 14. The tube is fixedly suspended on the support frame in the workshop. When bending the round tube 23, after the bending part of the round tube 23 is heated by the electromagnetic heating coil 9, the bending part of the round tube 23 is moved to the right and above the support roller 13. Then, the hydraulic cylinder A10 is opened, so that the push rod 11 drives the fixed frame 12 and the support roller 13 to rise, so that the support roller 13 contacts the lower end of the round tube 23. Then, the hydraulic cylinder B15 is opened, so that the lifting rod 16 drives the pressure block 17 to fall, so that the pressure block 17 contacts the upper end of the round tube 23. Then, the pressing mechanism is opened, so that the pressing mechanism presses down on the right side of the round tube 23, so that the bending part of the round tube 23 is bent at the support roller 13. This facilitates the bending of the round tube 23.

[0024] like Figure 4 The pressing mechanism includes a fixed frame 18, a cylinder 19, a sliding rod 20, a mounting plate 21, and a pressure roller 22. The cylinder 19 is fixedly mounted on the upper end of the fixed frame 18, and the sliding rod 20 is slidably mounted on the fixed frame 18. The upper end of the sliding rod 20 is connected to the output end of the cylinder 19. The mounting plate 21 is fixedly mounted on the lower end of the sliding rod 20, and the pressure roller 22 is rotatably mounted on the mounting plate 21. The pressure roller 22 is located to the right of the pressing block 17. The hoisting frame 14 is fixedly mounted on the support in the workshop. When bending the round tube 23, the cylinder 19 is opened, and the cylinder 19 causes the mounting plate 21 to drive the pressure roller 22 to descend through the sliding rod 20. During the descent, the pressure roller 22 contacts the round tube 23 and bends the round tube 23 by pressing the pressure roller 22. Example

[0025] Based on Example 1, both the pressure block 17 and the support roller 13 are provided with a high-temperature resistant coating; through the above-mentioned arrangement, the service life of the pressure block 17 and the support roller 13 is improved.

[0026] The electric slide rail 2, stepper motor 5, electromagnetic heater 8, support roller 13, and cylinder 19 of the mandrel-less tube bending device of this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A round tube mandrel-free tube bending apparatus comprising a base plate (1); characterized in that, It also includes a moving mechanism, a rotating mechanism, a heating mechanism, a clamping mechanism and a pressing mechanism. The rotating mechanism is mounted on the moving mechanism and is used to move the rotating mechanism left and right. The heating mechanism is mounted on the base plate (1) and has the function of heating. The clamping mechanism is located to the right of the heating mechanism. The pressing mechanism is located to the right of the clamping mechanism and has the function of pressing down. The heating mechanism is located to the right of the rotating mechanism.

2. The mandrel-less tube bending device as described in claim 1, characterized in that, The moving mechanism includes an electric slide rail (2) and a sliding plate (3). The electric slide rail (2) is fixedly installed on the base plate (1), and the sliding plate (3) is installed on the electric slide rail (2). The electric slide rail (2) is used to move the sliding plate (3) left and right. The rotating mechanism is installed on the upper end of the sliding plate (3).

3. The mandrel-less bending device for round tubes as described in claim 2, characterized in that, The rotating mechanism includes a support plate (4), a stepper motor (5), a rotating shaft (6), and a three-jaw chuck (7). The support plate (4) is fixedly installed on the upper end of the sliding plate (3), the stepper motor (5) is fixedly installed on the support plate (4), the rotating shaft (6) is rotatably installed on the support plate (4), the left end of the rotating shaft (6) is connected to the output end of the stepper motor (5), and the three-jaw chuck (7) is fixedly installed on the right end of the rotating shaft (6).

4. The mandrel-less bending device for round tubes as described in claim 1, characterized in that, The heating mechanism includes an electromagnetic heater (8) and an electromagnetic heating coil (9). The electromagnetic heater (8) is fixedly installed on the base plate (1), and the electromagnetic heater (8) is provided with an electromagnetic heating coil (9).

5. The mandrel-less bending device for round tubes as described in claim 1, characterized in that, The clamping mechanism includes a hydraulic cylinder A (10), a push rod (11), a fixed frame (12), a support roller (13), a hoisting frame (14), a hydraulic cylinder B (15), a lifting rod (16), and a pressure block (17). The hydraulic cylinder A (10) is fixedly installed on the base plate (1). The output end of the hydraulic cylinder A (10) is provided with a push rod (11). The fixed frame (12) is fixedly installed on the upper end of the push rod (11). The support roller (13) is rotatably installed on the fixed frame (12). The hydraulic cylinder B (15) is fixedly installed on the upper end of the hoisting frame (14). The lifting rod (16) is slidably installed on the hoisting frame (14). The upper end of the lifting rod (16) is connected to the output end of the hydraulic cylinder B (15). The pressure block (17) is fixedly installed on the lower end of the lifting rod (16). The pressure block (17) is located above the support roller (13).

6. The mandrel-less bending device for round tubes as described in claim 5, characterized in that, The pressing mechanism includes a fixed frame (18), a cylinder (19), a sliding rod (20), a mounting plate (21), and a pressure roller (22). The cylinder (19) is fixedly installed on the upper end of the fixed frame (18), the sliding rod (20) is slidably installed on the fixed frame (18), the upper end of the sliding rod (20) is connected to the output end of the cylinder (19), the mounting plate (21) is fixedly installed on the lower end of the sliding rod (20), and the pressure roller (22) is rotatably installed on the mounting plate (21). The pressure roller (22) is located on the right side of the pressure block (17).

7. The mandrel-less tube bending device as described in claim 5, characterized in that, The surfaces of the pressure block (17) and the support roller (13) are both provided with a high-temperature resistant coating.

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