Round pipe end rounding device

Abstract

The utility model discloses a round pipe end rounding device, and relates to the technical field of steel pipe machining equipment. The device comprises a rotating platform and a shaping and extruding device, wherein the shaping and extruding device is arranged at one end of the rotating platform; a plurality of rotating riding wheel sets are arranged on the rotating platform, each rotating riding wheel set comprises two rotating riding wheels, and the rotating riding wheels are connected with a driving device; the shaping and extruding device comprises an upper die and a lower die, the upper die and the lower die are oppositely arranged up and down and can move oppositely, and the pipe end of the circular pipe clamped between the forming surface of the upper die and the forming surface of the lower die is rounded through the opposite movement of the upper die and the lower die; and an upper die and a lower die of the shaping and extruding device are arranged in the diameter direction of the pipeline supported by the rotary riding wheel group. Even if the strength is inconsistent due to cold hardening, the pipe end of the circular pipe can be integrally extruded and formed within the range of the forming surface, so that the pipe end of the rounded circular pipe is consistent with the forming surface of the upper die and the forming surface of the lower die in shape, and other non-deformed parts cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe processing equipment, in particular to a round pipe end rounding device. Background Art

[0002] During the production and transportation of steel pipes, the pipe ends are often partially deformed due to various factors. The locally deformed pipe ends no longer remain round, which brings difficulties to subsequent construction or other processing procedures.

[0003] In order to meet the use requirements, the ends of the round tubes that have undergone local deformation need to be rounded. Generally, methods such as manual knocking, flame roasting and repair are adopted. Because after the local deformation of steel, the local deformation area will usually produce cold work hardening phenomenon, and the strength of the deformed part is higher than that of the undeformed part, making the manual rounding operation very difficult and unsafe. During the manual shaping process, the undeformed part with lower strength is more likely to deform first, resulting in the difficulty of achieving the rounding effect; at the same time, it is easy to cause damage to other parts of the pipe. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a device for rounding the ends of round tubes, so as to improve the rounding quality of the local deformation area of ​​the ends of round tubes.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] The utility model provides a round tube end rounding device, comprising: a rotating platform and a shaping and extruding device, wherein the shaping and extruding device is arranged at one end of the rotating platform;

[0007] The rotating platform is provided with a plurality of rotating supporting wheel groups, each rotating supporting wheel group includes two rotating supporting wheels, and the rotating supporting wheels are connected to the driving device;

[0008] The shaping extrusion device comprises an upper die and a lower die, which are arranged relative to each other up and down and can move toward each other. Through the movement of the upper die and the lower die toward each other, the end of the round tube clamped between the molding surfaces of the upper die and the lower die is rounded;

[0009] The upper die and the lower die of the shaping and extruding device are arranged in the diameter direction of the pipe supported by the rotating supporting wheel group.

[0010] Optionally, the upper mold is detachably mounted on the end of a pressure rod, and the other end of the pressure rod is rotatably mounted on the base of the shaping and extrusion device. Cylinder A and cylinder B are connected between the two ends of the pressure rod, so that the pressure rod moves driven by cylinder A and cylinder B, thereby driving the upper mold to move.

[0011] Optionally, the lower die is detachably mounted on a base of the shaping and extrusion device.

[0012] Optionally, the molding surface of the upper mold matches the inner surface of the end of the round tube, and the molding surface of the lower mold matches the outer surface of the end of the round tube.

[0013] Optionally, the height of the rotating supporting wheel is such that the lower surface of the supported round tube is higher than the forming surface of the lower die, and a set gap is formed between the lower surface of the round tube and the forming surface of the lower die.

[0014] Optionally, the driving devices of the multiple rotating supporting wheel assemblies are connected to the same driving control system, so that the multiple rotating supporting wheel assemblies rotate synchronously.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The forming surfaces of the upper and lower dies match the inner and outer circles of the round tube. Even if there is a situation where the strength is inconsistent due to cold working hardening, the tube end will be extruded as a whole within the range of the forming surface, so that the rounded tube end is consistent with the forming surface shape of the upper and lower dies, that is, consistent with the target shape of the tube end, and will not damage other undeformed parts.

[0017] 2. The rotating support wheel can rotate the round tube under the drive of the driving device, and adjust the position to be rounded to between the upper die and the lower die for rounding, which is convenient for the operator to operate.

[0018] 3. Driven by the two oil cylinders, the pressure rod moves quickly and accurately, and by adjusting the output of the two selected oil cylinders, different extrusion pressures can be applied over time during the full circle process, thereby realizing the design and adjustment of the pressure curve during the full circle process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for illustration only.

[0021] Figure 1 It is the overall structure diagram of the utility model in embodiment 1.

[0022] Figure 2 It is a diagram showing the overall structure in Example 1 from the axial direction of the steel pipe.

[0023] Figure 3 It is a structural diagram of the shaping extrusion device in Example 1.

[0024] Figure 4 It is a structural diagram of the shaping extrusion device in Example 1 shown from the axial direction of the steel pipe.

[0025] Figure 5 It is a structural diagram of the upper mold shown from the axial direction of the steel pipe in Example 1.

[0026] Figure 6 It is a structural diagram of the lower mold shown from the axial direction of the steel pipe in Example 1.

[0027] Among them: 1. base of the shaping and extrusion device; 2. pressure rod; 3. connecting shaft; 4. cylinder A; 41. cylinder B; 5. cylinder fixing bolt; 6. round tube; 7. first rotating support roller group; 71. second rotating support roller group; 8. first driving device; 81. second driving device; 9. upper die; 10. lower die; 11. tube end deformation point A; 12. tube end deformation point B; 13. lower die fixing bolt; 14. upper die fixing bolt. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Embodiment 1:

[0030] This embodiment provides a round tube end rounding device, comprising: a rotating platform and a shaping and extruding device, wherein the shaping and extruding device is arranged at one end of the rotating platform;

[0031] like Figure 1 As shown, a plurality of rotating supporting wheel groups are arranged on the rotating platform. Figure 1 The invention comprises two rotating supporting wheel groups, namely a first rotating supporting wheel group 7 and a second rotating supporting wheel group 71. Each rotating supporting wheel group comprises two rotating supporting wheels. The rotating supporting wheels are connected to a driving device and are driven by the driving device to rotate. Figure 1 In the embodiment, the first rotating supporting wheel group 7 is connected to the first driving device 8, and the second rotating supporting wheel group 71 is connected to the second driving device 81;

[0032] like Figure 2 As shown, the shaping extrusion device includes an upper die 9 and a lower die 10, which are arranged relatively to each other up and down and can move toward each other. Through the movement of the upper die 9 and the lower die 10 toward each other, the end of the round tube 6 clamped between the molding surface of the upper die 9 and the molding surface of the lower die 10 is rounded;

[0033] The upper die 9 and the lower die 10 of the shaping and extruding device are arranged in the diameter direction of the tube end of the round tube 6 supported by the rotating supporting wheel group.

[0034] By such arrangement, the forming surfaces of the upper and lower dies match the inner and outer circles of the round tube 6. Even if there is a situation where the strength is inconsistent due to cold hardening, the forming surface will first contact the deformed position during the process of extruding the tube end of the round tube 6 as a whole within the range of the forming surface, so that the shape of the tube end of the round tube 6 after rounding is consistent with the forming surface of the upper and lower dies, that is, consistent with the target shape of the tube end of the round tube 6, and will not damage other undeformed parts;

[0035] like Figure 4 As shown, since the upper die 9 and the lower die 10 are arranged in the diameter direction of the pipe supported by the rotating support wheel assembly, during the process of rotating the pipe, the forming surfaces of the upper and lower dies are always collinear with the diameter of the circle of the shaping target at the end of the round pipe 6, so that only the upper die 9 is moved to complete the rounding process.

[0036] Optional, such as Figure 3 As shown, the upper mold 9 is detachably mounted on the end of the pressure rod 2, and the other end of the pressure rod 2 is movably mounted on the base 1 of the shaping and extrusion device. Cylinders A4 and B41 are connected between the two ends of the pressure rod 2, so that the pressure rod 2 moves under the drive of cylinders A4 and B41, thereby driving the upper mold 9 to move.

[0037] Optional, such as Figure 3 As shown, the upper die 9 is mounted on the pressure rod 2 via the upper die fixing bolts 14.

[0038] Optional, such as Figure 3 As shown, the cylinder body parts of the oil cylinder A4 and the oil cylinder B41 are fixed on the base 1 of the shaping and extrusion device through the oil cylinder fixing bolts 5, and the pressure rod 2 is driven to move up and down through the extension and contraction of the piston rod;

[0039] Optionally, the piston rod ends of cylinder A4 and cylinder B41 are respectively connected to the pressure rod 2 through a connecting shaft 3, and the rotation axis of the connecting shaft 3 is perpendicular to the length direction of the pressure rod 2, which can make the transmission of the rotating pressure rod 2 and the linear motion of the piston rod more reasonable.

[0040] Optionally, the lower die 10 is detachably mounted on the base 1 of the shaping extrusion device; the pressure rod 2 is connected to the piston rods of the cylinder A4 and the cylinder B41. By adjusting the output of the two selected cylinders, different extrusion pressures can be applied over time during the rounding process, thereby realizing the design and adjustment of the pressure curve during the rounding process.

[0041] Optionally, the lower die 10 is mounted on the shaping and extrusion device base 1 via lower die fixing bolts 13 .

[0042] Optional, such as Figure 5 As shown, the molding surface of the upper mold 9 matches the inner surface of the tube end of the round tube 6. Figure 6 As shown, the molding surface of the lower mold 10 matches the outer surface of the tube end of the round tube 6.

[0043] Optional, such as Figure 2 As shown, the height of the rotating supporting wheel makes the lower surface of the supported round tube 6 higher than the forming surface of the lower die 10, and the lower surface of the round tube 6 and the forming surface of the lower die 10 are separated by a set gap, so that the round tube 6 will not interfere with the lower die 10 during rotation.

[0044] Optionally, the driving devices of the multiple rotating supporting wheel groups are connected to the same driving control system, so that the multiple rotating supporting wheel groups rotate synchronously, so that the circular tube 6 supported by them can rotate stably.

[0045] The round tube end rounding device in this embodiment is used to round the tube end, and the method includes:

[0046] like Figure 1 As shown, the round tube 6 is first placed on the electric support wheel, with the tube end located between the upper mold 9 and the lower mold 10.

[0047] like Figure 2 As shown, the deformed part of the tube end of the round tube 6, such as the tube end deformation point A11, is rotated between the upper and lower molds by an electric support wheel; optionally, the upper and lower molds are replaced with specifications that match the round tube 6 to be rounded;

[0048] Specifically, the first rotating support roller group A7 and the second rotating support roller group B71 are driven by the first driving device 8 and the second driving device 81 to rotate between the upper mold 9 and the lower mold 10.

[0049] The pressure rod 2 is driven downward by two hydraulic cylinders until the local deformation area of ​​the tube end of the round tube 6, such as the tube end deformation point A11, is pressed to fit firmly between the upper and lower molds;

[0050] Specifically, the pressure rod 2 is driven by the oil cylinder A4 and the oil cylinder B41 to move downward together with the upper die 9, so as to press the deformation point A11 of the pipe end downward to form a full circle.

[0051] Lift the pressure rod 2 and rotate the electric support wheel to rotate other deformation positions of the tube end of the round tube 6, such as the tube end deformation point B12, to between the upper and lower molds, and repeat the operation of pressing down the whole circle;

[0052] Specifically, the first rotating roller group A7 and the second rotating roller group B71 are driven by the first driving device 8 and the second driving device 81 to rotate to a full circle between the upper mold 9 and the lower mold 10 until the entire end of the round tube 6 is rounded to a required range.

[0053] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for rounding the ends of round tubes, characterized in that: include: A rotating platform and a shaping and extruding device, wherein the shaping and extruding device is arranged at one end of the rotating platform; The rotating platform is provided with a plurality of rotating supporting wheel groups, and the rotating supporting wheel groups include: rotating supporting wheels and a driving device for driving the rotating supporting wheels; The shaping extrusion device comprises an upper die and a lower die, which are arranged relative to each other up and down and can move toward each other. Through the movement of the upper die and the lower die toward each other, the end of the round tube clamped between the molding surfaces of the upper die and the lower die is rounded; The upper die and the lower die of the shaping and extruding device are arranged in the diameter direction of the pipe supported by the rotating supporting wheel group.

2. The round tube end rounding device according to claim 1, characterized in that: The upper mold is detachably mounted on the end of the pressure rod, and the other end of the pressure rod is rotatably mounted on the base of the shaping and extrusion device. Cylinders A and B are connected between the two ends of the pressure rod, so that the pressure rod moves under the drive of cylinders A and B, thereby driving the upper mold to move.

3. The round tube end rounding device according to claim 2, characterized in that: The cylinder bodies of the oil cylinder A and the oil cylinder B are fixed on the base of the shaping and extrusion device through the oil cylinder fixing bolts.

4. The round tube end rounding device according to claim 2, characterized in that: The ends of the piston rods of the oil cylinder A and the oil cylinder B are respectively connected to the pressure rod through a connecting shaft, and the rotation axis of the connecting shaft is perpendicular to the length direction of the pressure rod.

5. The round tube end rounding device according to claim 2, characterized in that: The upper die is mounted on the pressure rod through the upper die fixing bolts.

6. The round tube end rounding device according to claim 1, characterized in that: The lower die is detachably mounted on the base of the shaping and extrusion device.

7. The round tube end rounding device according to claim 6, characterized in that: The lower die is mounted on the base of the shaping and extrusion device through lower die fixing bolts.

8. The round tube end rounding device according to claim 1, characterized in that: The molding surface of the upper mold matches the inner surface of the tube end of the round tube, and the molding surface of the lower mold matches the outer surface of the tube end of the round tube.

9. The round tube end rounding device according to claim 1, characterized in that: The height of the rotating supporting wheel is such that the lower surface of the supported round tube is higher than the forming surface of the lower die, and a set gap is formed between the lower surface of the round tube and the forming surface of the lower die.

10. The round tube end rounding device according to claim 1, characterized in that: The driving devices of the plurality of rotating supporting wheel assemblies are connected to the same driving control system, so that the plurality of rotating supporting wheel assemblies rotate synchronously.

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