A U-shaped tube end straightening device

Abstract

This application relates to a tube end straightening device for a U-shaped tube, comprising a base, a clamping assembly disposed on the base for defining the position of the workpiece, a heating assembly for heating the tube end, and a shaping assembly for shaping. The shaping assembly includes a shaping mold for inserting into the tube end and a shaping drive for driving the shaping mold to move vertically. The shaping drive is disposed on the base, and its drive end is connected to the shaping mold. The heating assembly includes induction coils respectively fitted at the tube end and a power supply for powering the power supply. The power supply is connected to the induction coils to generate an alternating electromagnetic field. The tube end is first heated by the induction coils, and then the shaping mold descends and inserts into the tube end to shape the tube end. Heating the tube end before shaping reduces stress concentration during the tube end deformation process and ensures that the tube end remains circular after shaping.

Description

Technical Field

[0001] This application relates to the technical field of presses, and in particular to a nozzle straightening device for a U-shaped tube. Background Technology

[0002] During the production and processing of U-shaped tubes, a straight tube is usually bent into shape using bending equipment. During the forming process, the tube opening is subjected to a huge external force, which will cause the shape of the tube opening to change to a certain extent. When chamfering the tube opening later, if the shape of the tube opening is not regular, it is impossible to perform accurate chamfering. Therefore, the tube opening needs to be shaped after production is completed.

[0003] Current shaping methods typically involve using hydraulic jacks in conjunction with molds for correction. By inserting the mold into the pipe opening, hydraulic pressure is used to deform the pipe opening to match the mold. However, during the process of deforming the pipe opening using pressure, local stress concentration occurs, which affects the correction effect.

[0004] Therefore, a new technical solution is needed to address the above problems. Utility Model Content

[0005] In order to ensure that the U-shaped tube end maintains a circular shape after correction and is less prone to stress concentration, this application provides a U-shaped tube end correction device.

[0006] This application provides a U-shaped tube end straightening device, which adopts the following technical solution:

[0007] A U-shaped tube end straightening device includes a base, a clamping assembly disposed on the base for defining the position of the workpiece, a heating assembly for heating the tube end, and a shaping assembly for shaping.

[0008] The shaping assembly includes a shaping mold for insertion into the tube opening and a shaping drive for driving the shaping mold to move vertically. The shaping drive is disposed on the base, and the driving end of the shaping drive is connected to the shaping mold.

[0009] The heating assembly includes an induction coil respectively fitted at the pipe opening and a power supply for powering the induction coil, wherein the power supply is connected to the induction coil to generate an alternating electromagnetic field.

[0010] By adopting the above technical solution, the tube opening is first heated by an induction coil, and then the shaping mold is lowered and inserted into the tube opening to shape the tube opening. Heating the tube opening before shaping makes it less likely to cause stress concentration during the tube opening deformation process, and also ensures that the tube opening can maintain a circle after shaping.

[0011] Optionally, the base is further provided with a lifting assembly that drives the induction coil to move vertically. The lifting assembly includes a lifting drive fixed on the base and an insulating component disposed on the drive end of the lifting drive. The induction coil is connected to the insulating component and moves vertically with the insulating component.

[0012] By adopting the above technical solution, when the U-shaped tube is picked up or put down from the limiting component, the induction coil can move upward under the drive of the lifting drive component, so that the induction coil is no longer sleeved on the tube opening, making it more convenient to pick up or put down the U-shaped tube.

[0013] Optionally, the clamping assembly includes a fixed seat fixed to the base, a sliding seat slidably disposed on the base, and a limiting drive for moving the sliding seat. Limiting grooves are provided on the side walls of the fixed seat and the sliding seat that are close to each other. A U-shaped tube is disposed in the limiting groove, and both ends of the U-shaped tube are higher than the sliding seat and the fixed seat. The limiting drive is disposed on the base, and the driving end of the limiting drive is connected to the sliding seat.

[0014] By adopting the above technical solution, the U-shaped tube is clamped by both the fixed seat and the sliding seat, so that the position of the U-shaped tube can be kept stable. When the forming mold is inserted into the U-shaped tube, the limiting groove can also limit the shape of the opening of the U-shaped tube, so that the opening of the U-shaped tube remains round.

[0015] Optionally, the base is further provided with a blocking member for limiting the position of the fixed seat, and the end of the fixed seat away from the limiting drive member abuts against the blocking member.

[0016] By adopting the above technical solution, the blocking component provides stable support for the fixed seat, making it less likely to move when subjected to pressure from the sliding seat, and ensuring that the axis of the U-shaped tube positioned in the limiting groove coincides with the axis of the forming mold.

[0017] Optionally, an adjusting piece for adjusting the position of the fixed seat is also provided on the end face of the blocking member near the fixed seat. The adjusting piece is located between the blocking member and the fixed seat and abuts against both.

[0018] By adopting the above technical solution, it is difficult to accurately limit the subsequent installation of the fixing seat when installing the blocking component. Therefore, an adjustment piece is set between the fixing seat and the blocking component to adjust the position of the fixing seat so that the axis of the U-shaped tube opening positioned by the fixing seat can coincide with the axis of the forming mold.

[0019] Optionally: The fixed seat is further provided with a limiting component for limiting the position of the workpiece on the end face near the sliding seat. The limiting component includes a limiting member rotatably connected to the fixed seat and an elastic member for pushing the end of the limiting member away from the rotation axis toward the fixed seat. The end of the limiting member away from its rotation axis abuts against the workpiece. The sliding seat is further provided with a relief groove for accommodating the limiting component on the end face near the fixed seat.

[0020] By adopting the above technical solution, the U-shaped tube is subjected to a force towards the fixed seat by the limiting component. Before the sliding seat comes into contact with the fixed seat, the position of the U-shaped tube relative to the fixed seat is not easily changed, so that the U-shaped tube can be stably set in the limiting groove on the fixed seat.

[0021] Optionally: A flexible pad is provided on the end face of the limiting member near the workpiece, and the flexible pad abuts against the workpiece.

[0022] By adopting the above technical solution, when the limiting member abuts against the U-shaped tube, the limiting member can stably abut against the U-shaped tube, making it difficult for the limiting member and the U-shaped tube to move relative to each other. At the same time, when the limiting member abuts against the U-shaped tube, the surface of the U-shaped tube is not easily indented due to the abutment of the limiting member.

[0023] Optionally, a pull ring is also provided on the end face of the limiting member away from the fixed seat.

[0024] By adopting the above technical solution, when the limiting component needs to be rotated, a pulling force can be directly applied to the pull ring, thereby causing the limiting component to rotate. There is a position where force can be directly applied when rotating the limiting component, making the rotation of the limiting component more convenient and labor-saving.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. First, the tube opening is heated by an induction coil. Then, the forming mold is lowered and inserted into the tube opening to shape the tube opening. The tube opening is heated before shaping to prevent stress concentration during the tube opening deformation process and to ensure that the tube opening remains round after shaping.

[0027] 2. By using the limiting component to apply a force toward the fixed seat to the U-shaped tube, the position of the U-shaped tube relative to the fixed seat is not easily changed before the sliding seat comes into contact with the fixed seat, so that the U-shaped tube can be stably set in the limiting groove on the fixed seat. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0029] Figure 2 for Figure 1 Enlarged view of part A;

[0030] Figure 3 This is a schematic diagram illustrating the structure of the limiting component in an embodiment of this application.

[0031] In the diagram, 1. Base; 11. Blocking component; 111. Fixing plate; 112. Abutment plate; 113. Reinforcing rib; 12. Adjusting piece; 2. Clamping assembly; 21. Fixed seat; 22. Sliding seat; 221. Clearance groove; 23. Limiting drive component; 24. Limiting groove; 3. Heating assembly; 31. Induction coil; 32. Power supply; 4. Shaping assembly; 41. Shaping mold; 42. Shaping drive component; 5. Lifting assembly; 51. Lifting drive component; 52. Insulating component; 6. Limiting assembly; 61. Limiting component; 62. Elastic component; 63. Flexible pad; 64. Pull ring. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] This application discloses a tube end straightening device for a U-shaped tube, such as... Figure 1 As shown, the assembly includes a base 1, a clamping component 2 mounted on the base 1 for defining the position of the workpiece, a heating component 3 for heating the pipe opening, and a shaping component 4 for shaping. The shaping component 4 includes two shaping molds 41 for inserting into the pipe opening and a shaping drive component 42 for driving the shaping molds 41 to move vertically. In this embodiment, the shaping drive component 42 is a hydraulic cylinder. The shaping drive component 42 is mounted on the base 1, and the cylinder body of the shaping drive component 42 is connected to an oil pipeline. The flow direction of the hydraulic oil in the shaping drive component 42 is controlled by a solenoid valve connected to the cylinder body of the shaping drive component 42, thereby driving the shaping drive component 42. The driving end of the shaping drive component 42 is set downward and a sliding seat 22 is fixed by bolts. The sliding seat 22 is slidably mounted on the base 1. The shaping molds 41 are frustum-shaped with a smaller bottom and a larger top. The shaping molds 41 are mounted on the lower end of the sliding seat 22, and the lower end of the shaping molds 41 can be inserted into the pipe opening to shape the pipe opening.

[0034] like Figure 1 and Figure 2As shown, the clamping assembly 2 includes a fixed base 21 fixed on the base 1, a sliding base 22 slidably disposed on the base 1, and a limiting drive member 23 for moving the sliding base 22. Both the fixed base 21 and the sliding base 22 are rectangular in shape, and their adjacent end faces can abut against each other. Each of their adjacent end faces is provided with a limiting groove 24, which penetrates the upper end face of the fixed base 21 and the sliding base 22. A U-shaped tube is placed in the limiting groove 24 of the fixed base 21 and the sliding base 22, and the outer wall of the U-shaped tube abuts against the limiting groove 24. The opening of the U-shaped tube is set higher than the upper end face of the sliding base 22 and the fixed base 21. In this embodiment, the limiting drive component 23 is a hydraulic cylinder. The limiting drive component 23 is horizontally arranged and installed on the base 1. The limiting drive component 23 is located on the side of the sliding seat 22 away from the fixed seat 21. The driving end of the limiting drive component 23 is fixed to the sliding seat 22 by bolts, thereby driving the sliding seat 22 to move away from and closer to the fixed seat 21. After the U-shaped tube is placed in the limiting groove 24 on the fixed seat 21, the sliding seat 22 moves toward the fixed seat 21 and abuts against the fixed seat 21, thereby clamping the U-shaped tube between the two limiting grooves 24, so that the position of the U-shaped tube is limited.

[0035] Because the fixed seat 21 is continuously subjected to pressure from the sliding seat 22 after the U-shaped tube is positioned, prolonged pressure can easily cause the fixed seat 21 to change position, thus affecting the shaping effect. Therefore, the base 1 is also provided with a blocking member 11 to limit the position of the fixed seat 21. The blocking member 11 includes a horizontally arranged fixed plate 111 and an abutment plate 112 integrally formed above the fixed plate 111. The abutment plate 112 is arranged perpendicular to the fixed plate 111. Several reinforcing ribs 113 are welded and fixed between the abutment plate 112 and the fixed plate 111, and the relative position between the fixed plate 111 and the abutment plate 112 is limited by the reinforcing ribs 113. The lower end of the fixed plate 111 abuts against the upper part of the base 1, and the fixed plate 111 is fixed to the base 1 by bolts. An adjusting piece 12 is provided on the end face of the abutment plate 112 near the fixed seat 21. The end of the adjusting piece 12 away from the abutment plate 112 abuts against the fixed seat 21. The fixed seat 21 and the abutment plate 112 are fixed together by bolts. The position of the fixed seat 21 is adjusted by the adjusting piece 12 so that when the U-shaped tube is placed between the fixed seat 21 and the sliding seat 22, the axis of the tube opening can coincide with the axis of the forming mold 41.

[0036] The heating assembly 3 includes an induction coil 31 for fitting at the tube opening and a power supply 32 for power supply. The power supply 32 is connected to the positive and negative poles of the induction coil 31, thereby generating an alternating electromagnetic field in the induction coil 31. The induction coil 31 is used to heat the tube opening of the U-shaped tube, so that the tube opening is heated during the shaping process, thus the stress is less likely to concentrate during the deformation process, and the tube opening can remain round after shaping.

[0037] The base 1 is also equipped with a lifting assembly 5 that drives the induction coil 31 to move vertically. The lifting assembly 5 includes a lifting drive component 51 fixed on the base 1 and an insulating component 52 bolted to the drive end of the lifting drive component 51. In this embodiment, the lifting drive component 51 is a cylinder. The cylinder body of the lifting drive component 51 is mounted on the base 1 and is vertically arranged. The lifting drive component 51 is connected to an air compressor and is powered by the air compressor. The drive end of the lifting drive component 51 is located at the top. In this embodiment, the insulating component 52 is a wooden board. Both ends of the induction coil 31 pass through the insulating component 52. The two ends of the induction coil 31 passing through the insulating component 52 are respectively connected to the power supply 32 through wires. Thus, when heating, the induction coil 31 can descend and be fitted onto the tube opening. When heating is completed and the U-shaped tube needs to be removed, the induction coil 31 can move upward, so as not to affect the removal and placement of the U-shaped tube.

[0038] like Figure 3 As shown, after the U-shaped tube is placed in the limiting groove 24 within the fixed base 21, the sliding base 22 needs to abut against the fixed base 21 to limit the position of the U-shaped tube. During the closing process, the U-shaped tube may fall out of the limiting groove 24 without being limited. Therefore, a limiting component 6 for limiting the workpiece position is provided on the end face of the fixed base 21 near the sliding base 22. The limiting component 6 includes a limiting member 61 rotatably connected to the fixed base 21 and an elastic member 62 for pushing the end of the limiting member 61 away from the rotation axis toward the fixed base 21. The limiting member 61 is located on the end face of the fixed base 21 near the sliding base 22, and is positioned below the limiting groove 24, allowing the limiting member 61 to abut against the end of the U-shaped tube placed in the limiting groove 24 away from the fixed base 21. In this embodiment, the elastic element 62 is a torsion spring. The rotation axis of the elastic element 62 and the limiting element 61 are coaxially arranged. One end of the elastic element 62 is connected to the limiting element 61, and the other end of the elastic element 62 is connected to the fixed base 21. A clearance groove 221 is also provided on the end face of the sliding base 22 near the fixed base 21. When the fixed base 21 and the sliding base 22 are closed, the limiting component 6 can be located in the clearance groove 221.

[0039] A flexible pad 63 is also provided on the end face of the limiting member 61 near the U-shaped tube. In this embodiment, the flexible pad 63 is a rubber pad. The flexible pad 63 enables the limiting member 61 to stably abut against the surface of the U-shaped tube, making it difficult for the U-shaped tube and the limiting member 61 to move relative to each other. At the same time, when the limiting member 61 applies pressure to the U-shaped tube, the limiting member 61 is not likely to leave indentations on the surface of the U-shaped tube.

[0040] To make the rotation of the limiting member 61 easier, a pull ring 64 is provided on the end face of the limiting member 61 away from the fixed base 21. By applying a pulling force to the pull ring 64, the limiting member 61 can rotate in the direction away from the fixed base 21, so that the U-shaped tube can be easily placed in the limiting groove 24. The limiting member 61 has a position where force can be directly applied when rotating, so that the rotation of the limiting member 61 is more convenient and less strenuous.

[0041] The implementation principle of this embodiment is as follows: the fixed seat 21 and the sliding seat 22 are separated from each other. One hand applies force to the pull ring 64 to rotate the limiting member 61 away from the fixed seat 21. The other hand places the U-shaped tube into the limiting groove 24 and releases the hand so that the limiting member 61 abuts against the U-shaped tube. The sliding seat 22 moves towards the fixed seat 21 and abuts against it, thereby limiting the position of the U-shaped tube. The induction coil 31 descends and is fitted at the tube opening. The induction coil 31 raises the temperature of the tube opening. Then, the shaping mold 41 descends and inserts into the tube opening to correct the tube opening. After the correction is completed, the shaping mold 41 rises, the induction coil 31 moves upward, the sliding seat 22 moves away from the fixed seat 21, and the U-shaped tube is removed manually.

[0042] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for straightening the mouth of a U-tube, characterized in that: It includes a base (1), a clamping assembly (2) disposed on the base (1) for defining the position of the workpiece, a heating assembly (3) for heating the nozzle, and a shaping assembly (4) for shaping. The shaping component (4) includes a shaping mold (41) for insertion into the tube opening and a shaping drive (42) for driving the shaping mold (41) to move vertically. The shaping drive (42) is disposed on the base (1) and the driving end of the shaping drive (42) is connected to the shaping mold (41). The heating assembly (3) includes an induction coil (31) respectively fitted at the pipe opening and a power supply (32) for power supply. The power supply (32) is connected to the induction coil (31) to generate an alternating electromagnetic field.

2. A U-tube nozzle straightening device according to claim 1, wherein: The base (1) is also provided with a lifting assembly (5) that drives the induction coil (31) to move vertically. The lifting assembly (5) includes a lifting drive (51) fixed on the base (1) and an insulating part (52) provided on the drive end of the lifting drive (51). The induction coil (31) is connected to the insulating part (52) and moves vertically with the insulating part (52).

3. A U-tube nozzle straightening device according to claim 1, wherein: The clamping assembly (2) includes a fixed seat (21) fixed on the base (1), a sliding seat (22) slidably disposed on the base (1), and a limiting drive member (23) for driving the sliding seat (22) to move. The fixed seat (21) and the sliding seat (22) are provided with limiting grooves (24) on their side walls that are close to each other. A U-shaped tube is disposed in the limiting groove (24) and both ends of the U-shaped tube are higher than the sliding seat (22) and the fixed seat (21). The limiting drive member (23) is disposed on the base (1) and the driving end of the limiting drive member (23) is connected to the sliding seat (22).

4. A U-tube nozzle straightening device according to claim 3, wherein: The base (1) is also provided with a blocking member (11) for limiting the position of the fixed seat (21), and the end of the fixed seat (21) away from the limiting drive member (23) abuts against the blocking member (11).

5. A U-tube nozzle straightening device according to claim 4, wherein: The end face of the blocking member (11) near the fixed seat (21) is also provided with an adjusting piece (12) for adjusting the position of the fixed seat (21). The adjusting piece (12) is located between the blocking member (11) and the fixed seat (21) and abuts against both.

6. The tube end straightening device for a U-shaped tube according to claim 3, characterized in that: The fixed seat (21) is provided with a limiting component (6) for limiting the position of the workpiece on the end face of the sliding seat (22). The limiting component (6) includes a limiting member (61) rotatably connected to the fixed seat (21) and an elastic member (62) for pushing the end of the limiting member (61) away from the rotation axis toward the fixed seat (21). The end of the limiting member (61) away from its rotation axis abuts against the workpiece. The sliding seat (22) is also provided with a relief groove (221) for accommodating the limiting component (6) on the end face of the fixed seat (21).

7. The tube end straightening device for a U-shaped tube according to claim 6, characterized in that: The limiting member (61) has a flexible pad (63) on its end face near the workpiece, and the flexible pad (63) abuts against the workpiece.

8. The tube end straightening device for a U-shaped tube according to claim 6, characterized in that: A pull ring (64) is also provided on the end face of the limiting member (61) away from the fixed base (21).

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