A steel pipe guiding device and a steel pipe bending machine

Abstract

The present invention discloses a steel pipe guiding device and a steel pipe bending machine, which relates to the technical field of bending machines and includes: an adjusting rod, the tail shaft of which is rotatably connected between the base and the matching seat, and the head yoke shaft of which is rotatably connected to the bottom of the guiding seat. In the steel pipe guiding device, the adjusting rod has two motions. One is the planar circular rotation around the tail shaft, which can change the angle in the plane; the other is the spatial circular rotation around the bolt, which increases the degrees of freedom in three-dimensional space. The superposition of these two motions enables the adjusting rod to achieve complex composite motions, providing the device with flexible space adjustment capabilities. The guiding seat rotates around the head yoke shaft. Combining with the composite motion of the adjusting rod, the steel pipe channel can be adjusted in terms of horizontal, vertical and the angle around its own axis in three-dimensional space. The present invention significantly expands the motion dimension through the dual-axis composite motion of the adjusting rod and the multi-degree-of-freedom adjustment of the guiding seat, solving the problem that the degrees of freedom of the guiding device on the bending machine in the prior art are insufficient and cannot meet the spatial pose requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe benders, and particularly to a steel pipe guiding device and a steel pipe bender. Background Art

[0002] During operation, the steel pipe is placed on the bending die, and as the bending die rotates, the steel pipe is gradually bent into shape. Currently, to ensure that the steel pipe remains in a straight state before entering the bending die, a steel pipe bender is equipped with a guiding device.

[0003] In actual production, for the guiding device equipped on the steel pipe bender, when the angles and radii of the steel pipes to be bent change frequently, its position (guiding angle and height) needs to be adjusted and positioned according to the automation level of the equipment and the die design.

[0004] However, through actual operation verification, currently, most guiding devices use chutes / bolts for positioning, and can only achieve single-direction translation or height adjustment, with insufficient degrees of freedom, unable to meet the spatial pose requirements, and requiring repeated positioning, which severely restricts the normal operation of the pipe bending work and the achievement of the expected process objectives. Summary of the Invention

[0005] One of the objectives of the present invention is to solve the problem in the prior art that the guiding device on the pipe bender has insufficient degrees of freedom and cannot meet the spatial pose requirements.

[0006] Another objective of the present invention is to provide a steel pipe bender.

[0007] To achieve the above objective, the present invention adopts the following technical solution: A steel pipe guiding device, comprising: A tail shaft disposed on the adjusting rod is rotatably connected between a base and a fitting seat loosely fitted into the base.

[0008] A bolt passing through the fitting seat and the base is fixedly connected to lock the positioning seat.

[0009] The planar circular rotation of the adjusting rod around the tail shaft and the spatial circular rotation around the bolt are superimposed on each other, enabling the adjusting rod to perform a composite motion in three-dimensional space.

[0010] A nut is disposed at the upper end of the bolt and is exposed on the upper surface of the fitting seat.

[0011] A headstock shaft disposed on the adjusting rod is rotatably connected to a guiding seat, and the guiding seat is provided with a steel pipe channel for guiding the steel pipe. The guiding seat rotates around the headstock shaft. Combining with the composite motion of the adjusting rod, the steel pipe channel has the ability to adjust the angle in the horizontal, vertical, and self-axis directions in three-dimensional space.

[0012] A guide ring telescopically connected to the bottom of the guiding seat is provided with a locking groove, and the locking groove is adapted to a locking head protruding from the side of the headstock shaft.

[0013] In the above technical solution, when the embodiment of the present invention is used, the locking seat of the steel pipe guide device is pushed into the T-slot of the machine tool of the steel pipe bending machine, and the T-slot guides the steel pipe guide device to move to the desired position, and the matching of the locking seat and the T-slot is checked to ensure that the two are tightly fitted, and then the bolts and nuts are initially tightened using tools such as wrenches to initially fix the device on the machine tool. However, do not over-tighten the nuts to avoid difficulty in operation during subsequent adjustments.

[0014] When the position of the steel pipe channel needs to be adjusted, the staff can manually or through other driving devices to make the adjustment rod and the tail shaft synchronously rotate around the tail shaft axis in a plane circle, thereby changing the height of the guide seat connected to the adjustment rod and the steel pipe channel. The height can be controlled according to actual needs, and the required height can be determined by observation or with the help of measuring tools.

[0015] Next, the adjusting rod is rotated around the space circumference of the bolt. During operation, the adjusting rod can be rotated around the tail shaft axis while the space circumference around the bolt can be properly controlled so that the two movements are superimposed on each other to form a composite movement, and the movement trajectory forms a spiral line or a similar space curve to more accurately adjust the position of the steel pipe channel. By repeatedly adjusting the rotation angle around the tail shaft axis and around the bolt, a suitable combination is found to achieve the desired position.

[0016] Then, the guide seat is rotated around the main choke axis, which can directly change the angle of the steel pipe channel, so that the steel pipe channel can complete the adjustment of the three-dimensional spatial orientation and angle and flexibly change the guiding direction of the steel pipe.

[0017] Finally, hold the adjustment rod tightly, turn the nut, and use the threaded transmission between the nut and the bolt to move the nut along the axial direction of the bolt, press the base against the machine tool, and generate a clamping force between the loose fitting seat and the base to clamp the tail shaft, thereby fixing the three together and locking the adjustment rod posture. At the same time, move the guide ring at the bottom of the guide seat to fit the guide ring lock groove with the lock head of the first choke shaft, thereby locking the posture and making it difficult to change the direction and angle of the steel pipe channel.

[0018] The beneficial effects of the present invention are:

[0019] In the steel pipe guiding device of the present invention, the adjusting rod has two kinds of movements. One is to rotate around the tail shaft axis plane in a circular manner to change the angle in the plane; the other is to rotate around the bolt space in a circular manner to increase the three-dimensional spatial freedom. The superposition of these two kinds of movements allows the adjusting rod to achieve complex compound movements, providing the device with flexible spatial adjustment capabilities. The guide seat rotates around the foreshaft axis, combined with the compound movement of the adjusting rod, so that the steel pipe channel has horizontal, vertical and angle adjustment around its own axis in three-dimensional space.

[0020] The present invention significantly expands the motion dimension through the biaxial compound motion (tail shaft planar rotation + bolt spatial rotation) of the adjusting rod and the multi-degree-of-freedom adjustment of the guiding seat, solving the problem in the prior art that the degree of freedom of the guiding device on the pipe bender is insufficient and cannot meet the spatial pose requirements.

[0021] The base and the mating seat of the present invention adopt a non-rigid connection method of loose fitting, which can freely lock the positioning of the tail shaft and the base on the machine tool. Combined with the locking mechanism in which the guide ring lock groove and the lock head are dynamically adapted, the steel pipe guiding device is stabilized.

[0022] Further, in the embodiment of the present invention, the tail shaft and the head yoke shaft are fixedly connected to the adjusting rod.

[0023] Further, in the embodiment of the present invention, guide wheels are distributed in the upper and lower positions of the steel pipe channel, and the guide wheels are rotatably connected to the inner wall of the guiding seat.

[0024] Furthermore, in the embodiment of the present invention, the circumferential surface of the guide wheel is covered with a rubber layer, and the circumferential surface of the guide wheel is an arc-shaped structure.

[0025] Further, in the embodiment of the present invention, the adjusting rod is made of high-strength aluminum alloy, and the surface is coated with a wear-resistant ceramic coating.

[0026] Further, in the embodiment of the present invention, the mating seat and the bolt, and the base and the bolt are connected in a clearance fit manner.

[0027] Furthermore, in the embodiment of the present invention, the clearance between the mating seat and the bolt, and the base and the bolt is 0.1 - 0.5 mm.

[0028] Further, in the embodiment of the present invention, a lock washer is provided between the nut and the mating seat.

[0029] Further, in the embodiment of the present invention, the guide ring is sleeved on the head yoke shaft with a clearance of 0.1 mm - 0.3 mm.

[0030] To achieve the second of the above purposes, the present invention adopts the following technical solution: a steel pipe bender, the steel pipe bender has the steel pipe guiding device described in the first of the above invention purposes, and the steel pipe bender further includes: a machine tool provided with a T-shaped groove, and the T-shaped groove is adapted to the locking seat of the steel pipe guiding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic three-dimensional view of the steel pipe guiding device in the embodiment of the present invention.

[0032] Figure 2Another three-dimensional schematic diagram of the steel pipe guiding device according to the embodiment of the present invention.

[0033] Figure 3 Schematic diagram of the steel pipe guiding device according to the embodiment of the present invention after hiding the guiding seat.

[0034] Figure 4 Schematic diagram of the guide ring according to the embodiment of the present invention.

[0035] Figure 5 Schematic diagram of the steel pipe guiding device according to the embodiment of the present invention installed on the machine tool of the steel pipe bending machine.

[0036] 10. Adjusting rod, 11. Tail shaft, 12. Head restraint shaft, 13. Lock head;

[0037] 20. Base, 21. Fitting seat, 22. Bolt, 23. Nut;

[0038] 30. Locking position seat;

[0039] 40. Guide ring, 41. Lock groove;

[0040] 50. Guiding seat, 51. Steel pipe channel, 52. Guide wheel. Detailed implementation manners

[0041] In order to clearly and completely describe the purpose, technical solution of the present invention and make the advantages more clear, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] For the purposes of simplicity and illustration, the principles of the embodiments are mainly described by referring to examples. In the following description, many specific details are set forth in order to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, the well-known structure of a steel pipe bender is not described in detail to avoid unnecessarily making these embodiments difficult to understand. Additionally, all embodiments can be used in combination with each other. Embodiment 1

[0045] It should be noted first that, as the content of the specification, the structural shapes, connection relationships, mating relationships, and positional relationships that can be obtained without doubt from the specification drawings should be understood as the content of the specification.

[0046] A steel pipe guiding device, as Figure 1 、 Figure 2 shown, includes the following structure:

[0047] The tail shaft 11 is connected to the base 20 and the mating seat 21: The tail shaft 11 of the adjusting rod 10 is rotatably connected between the base 20 and the mating seat 21, and the mating seat 21 is loosely fitted into the base 20. This loose fitting connection allows the mating seat 21 to have a certain degree of movement relative to the base 20, providing a basic condition for the subsequent compound movement of the adjusting rod 10.

[0048] The bolt 22 is connected to the locking seat 30: The bolt 22 passes through the mating seat 21 and the base 20 and is fixedly connected to the locking seat 30. This connection method plays a role in stabilizing the structure, and at the same time restricts the excessive displacement of the mating seat 21 and the base 20 in certain directions, ensuring the stability of the entire device during movement, and providing a stable support point for the rotation of the adjusting rod 10 around the bolt 22.

[0049] The adjusting rod 10 and the tail shaft 11 rotate together in a plane around the axis of the tail shaft 11, and the circumferential rotation in space around the bolt 22 is superimposed on each other, enabling the adjusting rod 10 to achieve a compound movement in three-dimensional space. Through this compound movement, the adjusting rod 10 can reach different spatial positions to meet complex guiding requirements.

[0050] The nut 23 is engaged with the bolt 22: The upper end of the bolt 22 is provided with a nut 23 exposed on the upper surface of the mating seat 21. The nut 23 is engaged with the bolt 22 for adjusting the tightness between the tail shaft 11 and the base 20 and the mating seat 21.

[0051] The headstock shaft 12 is connected to the guiding seat 50: The headstock shaft 12 of the adjusting rod 10 is rotatably connected to the guiding seat 50. The guiding seat 50 is provided with a steel pipe channel 51 for guiding the steel pipe. The guiding seat 50 rotates around the headstock shaft 12. Combining with the compound movement of the adjusting rod 10, the steel pipe channel 51 has the ability to adjust the angle in the horizontal, vertical and self-axis directions in three-dimensional space. According to actual needs, the position and angle of the steel pipe channel 51 can be adjusted in all directions and at multiple angles, so as to accurately guide the direction of the steel pipe and meet the requirements of guiding the steel pipe under different working conditions.

[0052] As Figure 3 、 Figure 4 shown, the guide ring 40 is telescopically connected to the bottom of the guiding seat 50, and is provided with a locking groove 41, which is adapted to the locking head 13 protruding from the side of the headstock shaft 12. In this connection mode, the guide ring 40 can be telescopically adjusted according to actual use requirements. After being adjusted to the appropriate position, the locking head 13 can be inserted into the locking groove 41 to play a fixing role and prevent the guide ring 40 from moving randomly. At the same time, this connection also adds more constraints to the movement of the guiding seat 50. When guiding the steel pipe, combined with the movement of the guiding seat 50 and the adjusting rod 10, it ensures the accuracy and stability of guiding the steel pipe from more dimensions.

[0053] In the above technical solution, when the embodiment of the present invention is in use, as Figure 1 、 Figure 5 shown, the locking seat 30 of the steel pipe guiding device is pushed into the T-shaped groove of the machine tool of the steel pipe bending machine. The T-shaped groove guides the steel pipe guiding device to move to the required position. Check the mating condition of the locking seat 30 and the T-shaped groove to ensure a tight fit between the two. Then, use tools such as a wrench to initially tighten the bolt 22 and the nut 23 to initially fix the device on the machine tool. However, do not over-tighten the nut 23 to avoid difficulty in operation during subsequent adjustments.

[0054] When it is necessary to adjust the position of the steel pipe channel 51, the staff can manually or through other driving devices rotate the adjusting rod 10 around the axis of the tail shaft 11, thereby changing the height of the guiding seat 50 and the steel pipe channel 51 connected to the adjusting rod 10. The height can be controlled according to actual needs, and the required height can be determined by observation or with the help of measuring tools.

[0055] Next, the adjusting rod 10 is rotated around the space circumference of the bolt 22. During operation, the adjusting rod 10 can be rotated around the axis of the tail shaft 11 while the space circumference rotation around the bolt 22 can be appropriately controlled so that the two movements are superimposed on each other to form a composite movement, and the movement trajectory forms a spiral line or a similar space curve to more accurately adjust the position of the steel pipe channel 51. By repeatedly adjusting the rotation angle around the axis of the tail shaft 11 and around the bolt 22, a suitable combination is found to achieve the desired position.

[0056] Then, the guide seat 50 is rotated around the choke shaft 12 to directly change the angle of the steel pipe channel 51, so that the steel pipe channel 51 can adjust the three-dimensional spatial orientation and angle and flexibly change the guiding direction of the steel pipe.

[0057] Finally, hold the adjusting rod 10 tightly, turn the nut 23, and use the threaded transmission between the nut 23 and the bolt 22 to move the nut 23 along the axial direction of the bolt 22, press the base 20 on the machine tool, and generate a clamping force between the loosely engaged mating seat 21 and the base 20, clamping the tail shaft 11, thereby fixing the three together and locking the posture of the adjusting rod 10. At the same time, move the guide ring 40 at the bottom of the guide seat 50, so that the locking groove 41 of the guide ring 40 is engaged with the lock head 13 of the first choke shaft 12, thereby locking the posture, so that the orientation and angle of the steel pipe channel 51 are not easy to change.

[0058] The beneficial effects of the present invention are:

[0059] In the steel pipe guiding device of the present invention, the adjusting rod 10 has two kinds of movements. One is to rotate in a plane around the axis of the tail shaft 11 to change the angle in the plane; the other is to rotate in a space around the bolt 22 to increase the degree of freedom in three-dimensional space. The superposition of these two kinds of movements allows the adjusting rod 10 to achieve complex compound movements, providing the device with flexible spatial adjustment capabilities. The guide seat 50 rotates around the foreshaft 12, combined with the compound movement of the adjusting rod 10, so that the steel pipe channel 51 has horizontal, vertical and angle adjustment around its own axis in three-dimensional space.

[0060] The present invention significantly expands the movement dimension through the dual-axis compound movement of the adjustment rod 10 (plane rotation of the tail shaft 11 + spatial rotation of the bolt 22) and the multi-degree-of-freedom adjustment of the guide seat 50, thereby solving the problem that the degree of freedom of the guide device on the pipe bending machine in the prior art is insufficient and cannot meet the spatial posture requirements.

[0061] The base 20 and the mating seat 21 of the present invention adopt a loose-fitting non-rigid connection method to freely lock the tail shaft 11 and the base 20 on the machine tool, and cooperate with the locking mechanism of the guide ring 40 lock groove 41 and the lock head 13 to dynamically adapt to stabilize the steel pipe guiding device.

[0062] Specifically, if Figure 1As shown, the tail shaft 11 and the head yoke shaft 12 are fixedly connected to the adjusting rod 10. There is no specific limitation on the fixing method of the tail shaft 11 and the head yoke shaft 12. Bolt connection can be adopted. For example, the tail shaft 11 and the head yoke shaft 12 are fixedly connected to the adjusting rod 10 through high-strength bolts 22 of M8. The tightening torque of the bolts 22 is 30 - 35 N·m, and double nuts 23 are used for anti-loosening measures.

[0063] Specifically, as Figure 2 shown, guide wheels 52 are distributed in the upper and lower positions of the steel pipe channel 51. The guide wheels 52 are rotatably connected to the inner wall of the guiding seat 50. Four guide wheels 52 are evenly distributed in the upper and lower positions of the steel pipe channel 51. The upper and lower guide wheels 52 correspond to each other in pairs. The axial distance between the guide wheels 52 is 200 mm, and the radial distance is reasonably set according to the pipe diameter of the steel pipe channel 51 to ensure the effective guidance of the steel pipe.

[0064] More specifically, as Figure 2 shown, the circumferential surface of the guide wheel 52 is covered with a rubber layer, and the circumferential surface of the guide wheel 52 is an arc-shaped structure. The rubber layer is made of nitrile rubber, with a hardness of Shore A 60 - 65 degrees and a thickness of 5 mm. This rubber layer has good wear resistance, elasticity and antistatic performance, and can effectively reduce the wear and sliding between the guide wheel 52 and the steel pipe.

[0065] Specifically, the adjusting rod 10 is made of high-strength aluminum alloy, and its surface is coated with a wear-resistant ceramic coating.

[0066] Specifically, as Figure 1 shown, the mating seat 21 and the bolt 22, and the base 20 and the bolt 22 are connected in a clearance fit manner. The purpose is to enable the base 20 to fall on the surface of the machine tool along the axis of the bolt 22 in a non-rotating manner.

[0067] More specifically, the clearance between the mating seat 21 and the bolt 22, and the clearance between the base 20 and the bolt 22 is 0.1 - 0.5 mm. This range can not only ensure the flexible rotation of the adjusting rod 10, but also avoid the deviation of the movement track due to excessive clearance.

[0068] Specifically, a lock washer (not shown) is provided between the nut 23 and the mating seat 21.

[0069] Specifically, as Figure 4 shown, the guide ring 40 is sleeved on the head yoke shaft 12 with a clearance of 0.1 mm - 0.3 mm. Embodiment 2

[0070] A steel pipe bending machine, as Figure 5 shown, the steel pipe bending machine has the steel pipe guiding device in Embodiment 1. The steel pipe bending machine further includes: a machine tool provided with a T-shaped groove, and the T-shaped groove is adapted to the locking seat 30 of the steel pipe guiding device.

[0071] Although the above-described illustrative embodiments of the present invention have been described so that those skilled in the art can understand the present invention, the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, all inventions made using the concept of the present invention are within the scope of protection.

Claims

1. A steel pipe guiding device, characterized in that, Comprising: the tail shaft of the adjusting rod is rotatably connected between the base and the fitting seat loosely fitted in the base; A bolt passing through the fitting seat and the base is fixedly connected to the locking seat; The adjusting rod and the tail shaft rotate synchronously in a plane circle around the axis of the tail shaft and rotate in a space circle around the bolt, so that the adjusting rod realizes a composite motion in three-dimensional space; A nut is arranged at the upper end of the bolt and exposed on the upper surface of the fitting seat; The first clamping shaft of the adjusting rod is rotatably connected to the guiding seat, and the guiding seat is provided with a steel pipe channel for guiding the steel pipe. The guiding seat rotates around the first clamping shaft. Combining the composite motion of the adjusting rod, the steel pipe channel has the ability to adjust the angle in the horizontal, vertical and circumferential directions of its own axis in three-dimensional space; The guide ring telescopically connected to the bottom of the guiding seat is provided with a locking groove, and the locking groove is adapted to the locking head protruding from the side of the first clamping shaft.

2. The steel pipe guiding device according to claim 1, characterized in that, The tail shaft and the first clamping shaft are fixedly connected to the adjusting rod.

3. The steel pipe guiding device according to claim 1, wherein, Guide wheels are distributed in the upper and lower positions of the steel pipe channel, and the guide wheels are rotatably connected to the inner wall of the guiding seat.

4. The steel pipe guiding device according to claim 3, characterized in that, The circumferential surface of the guide wheel is covered with a rubber layer, and the circumferential surface of the guide wheel is an arc-shaped structure.

5. The steel pipe guiding device according to claim 1, characterized in that, The adjusting rod is made of high-strength aluminum alloy, and the surface is coated with a wear-resistant ceramic coating.

6. The steel pipe guiding device according to claim 1, wherein, The fitting seat and the bolt, and the base and the bolt are connected in a clearance fit manner.

7. The steel pipe guiding device according to claim 6, characterized in that, The clearance between the fitting seat and the bolt, and between the base and the bolt is 0.1-0.5mm.

8. The steel pipe guiding device according to claim 1, characterized in that, A lock washer is arranged between the nut and the fitting seat.

9. The steel pipe guiding device according to claim 1, characterized in that, The guide ring is sleeved on the first clamping shaft with a clearance of 0.1mm-0.3mm.

10. A steel pipe bending machine, characterized in that, The steel pipe bending machine has the steel pipe guiding device according to any one of claims 1-9 above, and the steel pipe bending machine further comprises: a machine tool provided with a T-shaped groove, and the T-shaped groove is adapted to the locking seat of the steel pipe guiding device.

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