Steel pipe guiding device and steel pipe bending machine

Abstract

The invention discloses a steel pipe guiding device and a steel pipe bending machine, and relates to the technical field of pipe bending machines, the steel pipe guiding device comprises an adjusting rod, a tail shaft of the adjusting rod is rotatably connected between a base and a matching seat, and a head shaft of the adjusting rod is rotatably connected to the bottom of a guiding seat. In the steel pipe guiding device, the adjusting rod can move in two modes. Firstly, the angle in the plane can be changed by circumferentially rotating around the plane of the tail shaft; 2, the device rotates around the bolt space circumference, so that the three-dimensional space freedom degree is increased; the two kinds of motion are overlapped, so that the adjusting rod achieves complex composite motion, and the flexible space adjusting capacity is provided for the device. The guide seat rotates around the head yoke shaft, and the angle of the steel pipe channel can be adjusted horizontally, vertically and around the axis direction of the steel pipe channel in a three-dimensional space by combining the compound motion of the adjusting rod. Through double-shaft composite motion of the adjusting rod and multi-degree-of-freedom adjustment of the guide seat, the motion dimension is obviously expanded. The problems that in the prior art, the degree of freedom of a guiding device on a pipe bending machine is insufficient, and the spatial pose requirement cannot be met are solved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe bending machines, and in particular to a steel pipe guiding device and a steel pipe bending machine. 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, in order to ensure that the steel pipe remains in a straight state before entering the bending die, the steel pipe bending machine is equipped with a guiding device.

[0003] In actual production, the steel pipe bending machine is equipped with a guiding device, and when the angle and radius of the steel pipe to be bent change frequently, its position (guide angle and height) needs to be adjusted and positioned according to the degree of automation of the equipment and the mold design.

[0004] However, after actual operation verification, it was found that the current guide devices mostly use slide / bolt positioning, which can only achieve single-direction translation or height adjustment. The degree of freedom is insufficient and cannot meet the spatial posture requirements. Repeated positioning is required, which seriously restricts the normal operation of the pipe bending work and the achievement of the expected process goals. Summary of the invention

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

[0006] A second object of the present invention is to provide a steel pipe bending machine.

[0007] To achieve one of the above purposes, the present invention adopts the following technical solution: a steel pipe guiding device, comprising: a tail shaft arranged on an adjusting rod is rotatably connected between a base and a matching seat loosely embedded in the base.

[0008] The bolts passing through the matching seat and the base are fixedly connected to the locking 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, so that the adjusting rod can realize compound motion in three-dimensional space.

[0010] The upper end of the bolt is provided with a nut exposed on the upper surface of the matching seat.

[0011] The first choke shaft arranged on the adjusting rod is rotatably connected to the guide seat, and the guide seat is provided with a steel pipe channel for guiding the steel pipe. The guide seat rotates around the first choke shaft. Combined with the compound movement of the adjusting rod, the steel pipe channel has the ability to adjust the angle horizontally, vertically and around its own axis in three-dimensional space.

[0012] A guide ring telescopically connected to the bottom of the guide seat is provided with a locking groove, and the locking groove is matched with a locking head protruding on the side of the first choke 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: 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.

[0019] The present invention significantly expands the movement dimension through the dual-axis compound movement of the adjustment rod (plane rotation of the tail shaft + spatial rotation of the bolt) and the multi-degree-of-freedom adjustment of the guide seat, 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.

[0020] The base and the matching seat of the present invention adopt a loose-fitting non-rigid connection method to freely lock the positioning of the tail shaft and the base on the machine tool, and cooperate with the locking mechanism of the guide ring lock groove and the lock head to dynamically adapt to stabilize the steel pipe guiding device.

[0021] Furthermore, in an embodiment of the present invention, the tail shaft and the front choke shaft are fixedly connected to the adjusting rod.

[0022] Furthermore, in an embodiment of the present invention, guide wheels are distributed at upper and lower positions of the steel pipe channel, and the guide wheels are rotatably connected to the inner wall of the guide seat.

[0023] Furthermore, in an 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.

[0024] Furthermore, in an 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.

[0025] Furthermore, in an embodiment of the present invention, the matching seat and the bolt, and the base and the bolt are connected in a clearance fit manner.

[0026] Furthermore, in an embodiment of the present invention, the gap between the mating seat and the bolt, and the gap between the base and the bolt are 0.1-0.5 mm.

[0027] Furthermore, in an embodiment of the present invention, an anti-loosening gasket is provided between the nut and the mating seat.

[0028] Furthermore, in an embodiment of the present invention, the guide ring is loosely sleeved on the first choke shaft with a clearance of 0.1 mm-0.3 mm.

[0029] In order to achieve the second of the above-mentioned purposes, the present invention adopts the following technical solution: a steel pipe bending machine, which has the steel pipe guiding device described in one of the above-mentioned invention purposes, and the steel pipe bending machine also has: a machine tool equipped with a T-slot, which is adapted to the locking seat of the steel pipe guiding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A three-dimensional schematic diagram of a steel pipe guiding device according to an embodiment of the present invention.

[0031] Figure 2Another schematic perspective view of the steel pipe guiding device according to an embodiment of the present invention.

[0032] Figure 3 A schematic diagram of the steel pipe guiding device according to an embodiment of the present invention with the guiding seat hidden.

[0033] Figure 4 Schematic diagram of a guide ring according to an embodiment of the present invention.

[0034] Figure 5 Schematic diagram of a steel pipe guiding device according to an embodiment of the present invention installed on a machine tool of a steel pipe bending machine.

[0035] 10. Adjustment rod, 11. Tail shaft, 12. First choke shaft, 13. Locking head; 20. base, 21. mating seat, 22. bolt, 23. nut; 30. Locking seat; 40, guide ring, 41, locking groove; 50. Guide seat, 51. Steel pipe channel, 52. Guide wheel. DETAILED DESCRIPTION

[0036] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail 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, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] For the purpose of simplicity and illustration, the principles of the embodiments are described mainly by reference to examples. In the following description, many specific details are presented to provide a thorough understanding of the embodiments. However, it is obvious that for ordinary technicians in this field, these embodiments may not be limited to these specific details in practice. In some instances, the known steel pipe bending machine structure is not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other. Example 1

[0040] It should be noted that the drawings in the specification are the contents of the specification. The structural shapes, connection relationships, matching relationships, and positional relationships that can be obtained without any doubt in the drawings in the specification should be understood as the contents of the specification.

[0041] A steel pipe guiding device, such as Figure 1 , Figure 2 As shown, the structure included is as follows: The tail shaft 11 is connected with the base 20 and the matching seat 21: the tail shaft 11 of the adjusting rod 10 is rotatably connected between the base 20 and the matching seat 21, and the matching seat 21 is loosely engaged with the base 20. This loose engagement connection allows the matching seat 21 to have a certain movable space relative to the base 20, providing basic conditions for the subsequent compound movement of the adjusting rod 10.

[0042] Bolt 22 is connected to locking seat 30: Bolt 22 passes through matching seat 21 and base 20, and is fixedly connected to locking seat 30. This connection mode stabilizes the structure, and at the same time limits excessive displacement of matching seat 21 and base 20 in certain directions, ensures the stability of the entire device during movement, and provides a stable support point for the rotation of adjustment rod 10 around bolt 22.

[0043] The circular rotation of the adjusting rod 10 and the tail shaft 11 in the plane around the axis of the tail shaft 11 is superimposed on the spatial circular rotation around the bolt 22, so that the adjusting rod 10 can achieve a compound motion in three-dimensional space. Through this compound motion, the adjusting rod 10 can reach different spatial positions to meet complex guidance requirements.

[0044] The nut 23 cooperates with the bolt 22 : the upper end of the bolt 22 is provided with a nut 23 exposed to the upper surface of the matching seat 21 , and the nut 23 cooperates with the bolt 22 to adjust the tightness between the tail shaft 11 and the base 20 and the matching seat 21 .

[0045] The first choke shaft 12 is connected to the guide seat 50: the first choke shaft 12 of the adjustment rod 10 is rotatably connected to the guide seat 50, and the guide seat 50 is provided with a steel pipe channel 51 for guiding the steel pipe. The guide seat 50 rotates around the first choke shaft 12, and combined with the compound movement of the adjustment rod 10, the steel pipe channel 51 has the ability to adjust the angle in the horizontal, vertical and around its own axis 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 angles, so as to accurately guide the direction of the steel pipe and meet the requirements for steel pipe guidance under different working conditions.

[0046] like Figure 3 , Figure 4 As shown, the guide ring 40 is telescopically connected to the bottom of the guide seat 50, which is provided with a lock groove 41, which is adapted to the lock head 13 protruding from the side of the first choke shaft 12. In this connection mode, the guide ring 40 can be telescopically adjusted according to actual use requirements. When adjusted to a suitable position, the lock head 13 can be embedded in the lock groove 41 to play a fixing role and prevent the guide ring 40 from moving at will. At the same time, this connection also adds more constraints to the movement of the guide seat 50. When guiding the steel pipe, the movement of the guide seat 50 and the adjustment rod 10 is coordinated to ensure the accuracy and stability of the steel pipe guidance from more dimensions.

[0047] In the above technical solution, when the embodiment of the present invention is used, Figure 1 , Figure 5 As shown, push the locking seat 30 of the steel pipe guide device 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, check the matching of the locking seat 30 and the T-slot to ensure that the two fit tightly, and then use a wrench or other tools to preliminarily tighten the bolts 22 and nuts 23 to preliminarily fix the device on the machine tool. However, do not over-tighten the nuts 23 to avoid difficulty in operation during subsequent adjustments.

[0048] When the position of the steel pipe passage 51 needs to be adjusted, the staff can rotate the adjustment rod 10 around the axis of the tail shaft 11 manually or through other driving devices, thereby changing the height of the guide seat 50 connected to the adjustment rod 10 and the steel pipe passage 51. 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] The beneficial effects of the present invention are: 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.

[0053] 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.

[0054] 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.

[0055] Specifically, Figure 1As shown, the tail shaft 11 and the front choke shaft 12 are fixedly connected to the adjustment rod 10. The tail shaft 11 and the front choke shaft 12 are not limited to a specific fixing method, and can be connected by bolts 22. For example, the tail shaft 11 and the front choke shaft 12 are fixedly connected to the adjustment rod 10 by M8 high-strength bolts 22, the tightening torque of the bolts 22 is 30-35N·m, and double nuts 23 are used to prevent loosening.

[0056] Specifically, Figure 2 As shown, guide wheels 52 are distributed at the upper and lower parts of the steel pipe channel 51, and the guide wheels 52 are rotatably connected to the inner wall of the guide seat 50. Four guide wheels 52 are evenly distributed at the upper and lower parts of the steel pipe channel 51, and the upper and lower guide wheels 52 correspond to each other. The axial spacing between the guide wheels 52 is 200 mm, and the radial spacing is reasonably set according to the diameter of the steel pipe channel 51 to ensure effective guidance of the steel pipe.

[0057] More specifically, if Figure 2 As 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 A60-65 and a thickness of 5 mm. The rubber layer has good wear resistance, elasticity and antistatic properties, and can effectively reduce wear and sliding between the guide wheel 52 and the steel pipe.

[0058] Specifically, the adjusting rod 10 is made of high-strength aluminum alloy, and the surface is coated with a wear-resistant ceramic coating.

[0059] Specifically, Figure 1 As shown, the matching seat 21 and the bolt 22, as well as 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 machine tool surface along the axis of the bolt 22 in a non-rotating manner.

[0060] More specifically, the gap between the matching seat 21 and the bolt 22, and between the base 20 and the bolt 22 is 0.1-0.5 mm, which can ensure the flexible rotation of the adjusting rod 10 and avoid the deviation of the movement track caused by too large a gap.

[0061] Specifically, an anti-loosening gasket (not shown) is provided between the nut 23 and the mating seat 21 .

[0062] Specifically, Figure 4 As shown, the guide ring 40 is sleeved on the first choke shaft 12 with a clearance of 0.1mm-0.3mm. Example 2

[0063] A steel pipe bending machine, such as Figure 5 As shown, the steel pipe bending machine has the steel pipe guiding device in Example 1, and the steel pipe bending machine also has: a machine tool equipped with a T-slot, and the T-slot is adapted to the locking seat 30 of the steel pipe guiding device.

[0064] Although the above describes the illustrative specific embodiments of the present invention 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 as defined and determined by the attached claims, all inventions and creations using the concepts of the present invention are protected.

Claims

1. A steel pipe guiding device, characterized in that: The invention comprises: a tail shaft arranged on the adjusting rod is rotatably connected between a base and a matching seat loosely embedded in the base; A bolt that penetrates the mating seat and the base is fixedly connected to the locking seat; The adjusting rod and the tail shaft synchronously rotate in a plane around the axis of the tail shaft and in a space around the bolt, thereby realizing a compound motion of the adjusting rod in a three-dimensional space. The upper end of the bolt is provided with a nut exposed on the upper surface of the matching seat; The first choke shaft provided on the adjusting rod is rotatably connected to the guide seat, and the guide seat is provided with a steel pipe channel for guiding the steel pipe. The guide seat rotates around the first choke shaft, and combined with the composite movement of the adjusting rod, the steel pipe channel has the ability to adjust the angle in the horizontal, vertical and around its own axis in three-dimensional space; A guide ring telescopically connected to the bottom of the guide seat is provided with a locking groove, and the locking groove is matched with a locking head protruding on the side of the first choke shaft.

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

3. The steel pipe guiding device according to claim 1, characterized in that: Guide wheels are distributed above and below the steel pipe channel, and the guide wheels are rotatably connected to the inner wall of the guide 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 its surface is coated with a wear-resistant ceramic coating.

6. The steel pipe guiding device according to claim 1, characterized in that: The matching 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 gap between the matching seat and the bolt, and the gap between the base and the bolt is 0.1-0.5mm.

8. The steel pipe guiding device according to claim 1, characterized in that: An anti-loosening gasket is arranged between the nut and the matching seat.

9. The steel pipe guiding device according to claim 1, characterized in that: The guide ring is sleeved on the first choke 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 to 9, and further comprises: a machine tool provided with a T-slot, wherein the T-slot is adapted to the locking seat of the steel pipe guiding device.

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