Continuous pipe bending device for small-diameter thin-wall microtubule

Abstract

The utility model discloses a small-diameter thin-wall microtube continuous bending device which comprises a bottom plate, and a length control assembly, a tube fixing assembly and a handle fixing assembly are fixed to the bottom plate. The pipe bending assembly is rotationally connected to the bottom plate and rotationally connected with the extending part of the handle fixing assembly, and the lower surface of the extending part of the handle fixing assembly makes contact with the upper surface of the pipe bending assembly. The pipe bending assembly is located between the length control assembly and the pipe fixing assembly. According to the utility model, the problem that the precision and the quality of the bent small-diameter thin-wall microcapillary are difficult to guarantee is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe processing equipment, and relates to a continuous pipe bending device for small-diameter thin-walled micro pipes. Background Art

[0002] Pipes can also be divided into large-diameter pipes, small-diameter pipes and micro pipes according to the caliber. Seamless steel pipes with a diameter of 89 mm and above are large-diameter seamless steel pipes; pipes with a diameter less than 89 mm and more than 4 mm are small-diameter pipes; pipes with a diameter of 4 mm and below are micro pipes. According to the wall thickness, they can be divided into thin-walled pipes and thick-walled pipes. Pipes with an outer diameter to wall thickness ratio greater than 20 are called thin-walled pipes; pipes with an outer diameter to wall thickness ratio less than 20 are called thick-walled pipes.

[0003] In recent years, in the aerospace field, pipe bending parts have received great attention. Pipe bending parts are usually processed using small-diameter thin-walled pipes or micro pipes, and the most common processing method is bending processing, and accuracy and processing quality are crucial.

[0004] At present, most pipe bending machines on the market are commonly used in the construction industry or the transportation industry, and are suitable for large-diameter or thick-walled pipes. The processing of large-diameter thick-walled pipes is simple and not prone to bending defects, but the accuracy is not high. The bending angle of large-diameter pipes is usually within 90°, which is difficult to meet the bending processing of small-diameter thin-walled pipes.

[0005] Due to the small diameter and thin wall of small-diameter thin-walled micro pipes, they are extremely prone to ovality, wrinkling or cracking after bending processing. Moreover, since the pipe circuits used in heat exchangers usually need to be bent 180° and the turning radius needs to be guaranteed, a pipe bending device that can guarantee its accuracy and qualified quality after bending is required. Summary of the Invention

[0006] In order to achieve the above object, the utility model provides a continuous pipe bending device for small-diameter thin-walled micro pipes, which solves the problem that it is difficult to guarantee the accuracy and quality of small-diameter thin-walled micro pipes after bending.

[0007] To solve the above technical problems, the technical solution adopted by the utility model is a continuous pipe bending device for small-diameter thin-walled micro pipes, which includes a bottom plate. A length control component, a pipe fixing component and a handle fixing component are fixed on the bottom plate; the pipe bending component is rotatably connected to the bottom plate and rotatably connected to a part extending from the handle fixing component, and the lower surface of the part extending from the handle fixing component is in contact with the upper surface of the pipe bending component; the pipe bending component is located between the length control component and the pipe fixing component.

[0008] Further, the elbow component includes an upper plate and a lower plate, and the left ends of the upper plate and the lower plate are fixedly connected by a connecting plate; a fixed wheel and a rotating wheel arranged vertically are disposed between the upper plate and the lower plate. Among them, both ends of the rotating wheel are rotatably connected to the upper plate and the lower plate respectively, a cylindrical pin is arranged at the center of the fixed wheel, and the upper and lower ends of the cylindrical pin respectively penetrate through the upper plate and the lower plate and are rotatably connected to the upper plate and the lower plate respectively. The part of the cylindrical pin extending out of the lower plate is rotatably connected to the bottom plate.

[0009] Further, the outer sides of the fixed wheel and the rotating wheel are in contact with each other. A circle of semi-circular grooves are respectively formed on the outer side walls of the fixed wheel and the rotating wheel. The diameter of the semi-circular grooves is the same as the diameter of the thin-walled microtube to be processed, and the two semi-circular grooves are horizontally arranged; the part of the semi-circular groove of the fixed wheel in contact with the semi-circular groove of the rotating wheel forms a circular groove.

[0010] Further, the upper plate and the lower plate are both provided with second countersunk waist-shaped holes with the same length. The two rotating wheel fixing plates are respectively fixedly connected to the upper plate and the lower plate through the second countersunk waist-shaped holes and third bolts, and the rotating wheel fixing plates are respectively located at both ends of the rotating wheel; a pin shaft is arranged inside the rotating wheel, and both ends of the pin shaft are rotatably connected to the rotating wheel fixing plates.

[0011] Further, a through hole penetrating the upper and lower surfaces is formed in the length control component, and a linear first countersunk waist-shaped hole is formed on the bottom plate. The positions of the first countersunk waist-shaped hole and the through hole correspond up and down; the length control component and the bottom plate are fixedly connected through the first countersunk waist-shaped hole, the through hole, and the first bolt and the first nut.

[0012] Further, the pipe fixing component includes a pipe fixing upper plate and a pipe fixing lower plate, and the pipe fixing upper plate and the pipe fixing lower plate are closely attached to each other; there is a circular groove with the same diameter as the thin-walled microtube to be processed between the pipe fixing lower plate and the pipe fixing upper plate. The upper half of the circular groove is formed in the pipe fixing upper plate, and the lower half of the circular groove is formed in the pipe fixing lower plate; the circular groove formed between the fixed wheel and the rotating wheel is in a straight line with the circular groove between the pipe fixing upper plate and the pipe fixing lower plate.

[0013] Further, the part of the upper end of the cylindrical pin extending out of the upper plate is rotatably connected to the handle fixing component.

[0014] Further, the upper plate and the lower plate are respectively fixedly connected to the connecting plate through fourth bolts.

[0015] Further, the handle fixing component and the pipe fixing component are fixedly connected to the bottom plate through second bolts, and the handle fixing component is located on the upper surface of the pipe fixing component.

[0016] The beneficial effects of the present utility model are:

[0017] 1. High bending accuracy: The bending size can be controlled by adjusting the distance between the length control component and the pipe bending component.

[0018] 2. The bending angle can reach 180°: By rotating the thin-walled microtube after bending and then bending it again, continuous bending of the thin-walled microtube is achieved, and the bending angle reaches 180°.

[0019] 3. Due to the setting of the circular groove and the semi-circular groove, bending defects are not easily generated, ensuring that the pipe wall is smooth and does not lose its roundness after bending, and is suitable for continuous bending of small-diameter pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the continuous pipe bending device according to an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the connection between the length control component and the bottom plate according to an embodiment of the present invention.

[0023] Figure 3 It is a schematic diagram of the connection between the pipe fixing component and the bottom plate according to an embodiment of the present invention.

[0024] Figure 4 It is a schematic diagram of the connection between the pipe bending component and the bottom plate according to an embodiment of the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of the pipe bending component according to an embodiment of the present invention.

[0026] In the figure, 1. Length control component, 2. Bottom plate, 3. Pipe bending component, 4. Handle fixing component, 5. Fixed wheel, 6. Rotating wheel, 7. Pipe fixing component, 8. Through hole, 9. First countersunk waist-shaped hole, 10. First bolt, 11. First nut, 12. Pipe fixing upper plate, 13. Pipe fixing lower plate, 14. Upper plate, 15. Lower plate, 16. Connecting plate, 17. Cylindrical pin, 18. Second bolt, 19. Second countersunk waist-shaped hole, 20. Third bolt, 21. Pin shaft, 22. Rotating wheel fixing plate, 23. Fourth bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] As Figures 1 to 5 shown, the present utility model provides a continuous pipe bending device for small-diameter thin-walled microtubes, including a length control component 1, which is fixedly connected to a bottom plate 2, and the length control component 1 can slide freely on the bottom plate 2 and be fixed; a pipe fixing component 7 for limiting the small-diameter thin-walled microtube and a handle fixing component 4 are fixed on the bottom plate 2, wherein the handle fixing component 4 is located above the pipe fixing component 7, and both are fixedly connected to the bottom plate 2 through a second bolt 18; a pipe bending component 3 is rotatably connected to the bottom plate 2 through a cylindrical pin 17 and is rotatably connected to a protruding part of the handle fixing component 4, wherein the upper surface of the pipe bending component 3 is in contact with the lower surface of the protruding part of the handle fixing component 4; the handle fixing component 4 limits the pipe bending component 3 through the cylindrical pin 17 to prevent the pipe bending component 3 from shaking; the pipe bending component 3 is located between the length control component 1 and the pipe fixing component 7. When in use, the thin-walled microtube is sequentially passed through the pipe fixing component 7 and the pipe bending component 3, and then abutted against the length control component 1; the length control component 1 mainly controls the length dimension of the currently processed bending section. During processing, by calculating the length of the arc section plus the straight section after bending, and then adjusting the distance from the length control component 1 to the center of the cylindrical pin 17, the dimensional accuracy of the currently bent section (the bending dimension in the present utility model) can be controlled; after adjustment, bending can be performed through the pipe bending component 3.

[0029] As Figures 1 to 2 shown, in some embodiments, a through hole 8 penetrating the upper and lower surfaces is provided in the length control component 1, and a linear first countersunk waist-shaped hole 9 is provided on the bottom plate 2, and the positions of the first countersunk waist-shaped hole 9 and the through hole 8 correspond up and down; the length control component 1 and the bottom plate 2 are fixedly connected through the first countersunk waist-shaped hole 9, the through hole 8, and a first bolt 10 and a first nut 11. To move the length control component 1, only need to loosen the first nut 11, slide the length control component 1 along the direction of the first countersunk waist-shaped hole 9, and tighten the first nut 11 after reaching the position.

[0030] In some embodiments, the first nut 11 is located in the first countersunk waist-shaped hole 9, the bolt head of the first bolt 10 is located on the upper surface of the length control component 1, and the bottom end of the first bolt 10 is fixedly connected to the first nut 11.

[0031] In some embodiments, the bolt head of the first bolt 10 is located in the first countersunk waist-shaped hole 9, and the bottom end of the first bolt 10 extends out of the length control assembly 1 and is fixedly connected through the first nut 11.

[0032] In some embodiments, on the bottom plate 2, a groove can be formed by opening a groove with the same width as the length control assembly 1 and a length equal to or greater than the length of the first countersunk waist-shaped hole 9 to limit the left and right positions of the length control assembly 1, thereby improving the convenience during the sliding of the length control assembly 1.

[0033] As Figure 1 and Figure 3 shown, in some embodiments, the pipe fixing assembly 7 includes a pipe fixing upper plate 12 and a pipe fixing lower plate 13. The pipe fixing upper plate 12 and the pipe fixing lower plate 13 are closely attached to each other. There is a circular groove with the same diameter as the pipe to be processed (thin-walled micro-pipe) between the pipe fixing lower plate 13 and the pipe fixing upper plate 12. The upper half of the circular groove is formed in the pipe fixing upper plate 12, and the lower half of the circular groove is formed in the pipe fixing lower plate 13. The circular groove is used to fix the thin-walled micro-pipe to prevent the non-bending part from moving during bending.

[0034] As Figure 1 、 Figures 4 to 5 shown, in some embodiments, the pipe bending assembly 3 includes an upper plate 14 and a lower plate 15. The left ends of the upper plate 14 and the lower plate 15 are fixedly connected through a connecting plate 16. Between the upper plate 14 and the lower plate 15, there are fixed wheels 5 and rotating wheels 6 both in a cylindrical shape. The two ends of the rotating wheel 6 are respectively rotatably connected to the upper plate 14 and the lower plate 15. A cylindrical pin 17 is arranged at the center of the fixed wheel 5. The upper end of the cylindrical pin 17 penetrates through the upper plate 14 and is rotatably connected to the upper plate 14 through a bearing. The lower end of the cylindrical pin 17 penetrates through the lower plate 15 and is located in the bottom plate 2. The lower end of the cylindrical pin 17 is respectively rotatably connected to the lower plate 15 and the bottom plate 2 through bearings. A circle of semi-circular grooves are respectively formed on the outer side walls of the fixed wheel 5 and the rotating wheel 6. The diameter of the semi-circular grooves is the same as the diameter of the pipe to be processed, and the two semi-circular grooves are horizontal. The circular groove formed between the two semi-circular grooves is the same as the circular groove in the pipe fixing assembly 7. During bending, the thin-walled micro-pipe is passed through the middle of the two semi-circular grooves. Due to the same diameter, the circular groove formed between the two semi-circular grooves firmly clamps the thin-walled micro-pipe. At this time, the pipe bending assembly 3 is rotated with the cylindrical pin 17 as the axis, and the rotating wheel 6 rotates around the fixed wheel 5, driving the thin-walled micro-pipe to bend around the fixed wheel 5.

[0035] As Figure 1 、 Figures 4 to 5As shown, in some embodiments, the upper plate 14 and the lower plate 15 are both provided with second countersunk waist-shaped holes 19 having the same length. The two rotating wheel fixing plates 22 are respectively fixedly connected to the upper plate 14 and the lower plate 15 through the second countersunk waist-shaped holes 19 and the third bolts 20, and the rotating wheel fixing plates 22 are respectively located at both ends of the rotating wheel 6. A pin shaft 21 is arranged inside the rotating wheel 6, and both ends of the pin shaft 21 are rotatably connected to the rotating wheel fixing plates 22 through bearings. When it is necessary to replace the rotating wheel 6 with different diameters, due to the different diameters, the distance between its central axis and the central axis of the fixed wheel 5 is different. At this time, it is necessary to adjust the position of the rotating wheel fixing plate 22. Therefore, the third bolt 20 can be loosened, and then the rotating wheel fixing plate 22 is moved along the second countersunk waist-shaped hole 19. After reaching the position, the third bolt 20 is tightened to realize the adjustment of the position of the rotating wheel fixing plate 22.

[0036] As Figure 4 shown, in some embodiments, the part of the upper end of the cylindrical pin 17 extending out of the upper plate 14 is rotatably connected to the handle fixing assembly 4 through a bearing to increase the rotational flexibility of the bent pipe assembly 3.

[0037] As Figure 5 shown, in some embodiments, the upper plate 14 and the lower plate 15 are respectively fixedly connected to the connecting plate 16 through the fourth bolts 23, which is convenient for disassembly.

[0038] During processing, the thin-walled microtube is inserted through the tube fixing assembly 7, passes through the circular groove part between the fixed wheel 5 and the rotating wheel 6, calculates the length to be processed, adjusts the length control assembly 1. After the end of the thin-walled microtube is pressed against the length control assembly 1, the handle fixing assembly 4 and the tube fixing assembly 7 are tightened with the second bolt 18. Then, the bent pipe assembly 3 is rotated with a monkey wrench to achieve the purpose of bending the pipe. After a single bend is formed, the thin tube is pushed forward to the length control assembly 1, and then the thin tube is rotated along the feeding axis to another plane, and the bending is repeated to achieve the purpose of continuous bending.

[0039] It should be noted that for tubes with different diameters, or for bends with different radii to be processed, it is necessary to replace the rotating wheel 6, the fixed wheel 5 and the tube fixing assembly 7 with different specifications.

[0040] The radius of the rotating wheel 6 shall not be greater than the radius of the fixed wheel 5, otherwise interference will occur when the bending is too large. The diameter of the circular groove in the middle of the wheel body is the same as the diameter of the tube to be processed, and the diameter of the middle part of the tube fixing assembly 7 is the same as the diameter of the tube to be processed.

[0041] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0042] The above are only the preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model are all included in the protection scope of the present utility model.

Claims

1. A small-diameter, thin-walled micro-tube continuous bending device, comprising a bottom plate (2), characterized in that: The base plate (2) is fixed with a length control component (1), a pipe fixing component (7) and a handle fixing component (4); the bent pipe component (3) is rotatably connected to the base plate (2) and is rotatably connected to the extended portion of the handle fixing component (4), and the lower surface of the extended portion of the handle fixing component (4) is in contact with the upper surface of the bent pipe component (3); the bent pipe component (3) is located between the length control component (1) and the pipe fixing component (7); The bending pipe assembly (3) comprises an upper plate (14) and a lower plate (15), wherein the left end of the upper plate (14) is fixedly connected to the left end of the lower plate (15) via a connecting plate (16); a vertically arranged fixed wheel (5) and a rotating wheel (6) are provided between the upper plate (14) and the lower plate (15), wherein the two ends of the rotating wheel (6) are respectively rotatably connected to the upper plate (14) and the lower plate (15); a cylindrical pin (17) is provided at the center of the fixed wheel (5); the upper and lower ends of the cylindrical pin (17) respectively penetrate the upper plate (14) and the lower plate (15) and are respectively rotatably connected to the upper plate (14) and the lower plate (15); and the portion of the cylindrical pin (17) extending out of the lower plate (15) is rotatably connected to the bottom plate (2); The fixed wheel (5) and the rotating wheel (6) are in contact with each other on their outer side surfaces. The outer side walls of the fixed wheel (5) and the rotating wheel (6) are respectively provided with a circle of semicircular grooves. The diameter of the semicircular grooves is the same as the diameter of the thin-walled microtube to be processed. The two semicircular grooves are arranged horizontally. The circular groove formed between the two semicircular grooves is the same as the circular groove in the tube fixing assembly (7). The portion where the semicircular groove of the fixed wheel (5) contacts the semicircular groove of the rotating wheel (6) forms a circular groove. The tube fixing assembly (7) comprises a tube fixing upper plate (12) and a tube fixing lower plate (13), wherein the tube fixing upper plate (12) and the tube fixing lower plate (13) are tightly fitted with each other; a circular groove having the same diameter as the thin-walled microtube to be processed is provided between the tube fixing lower plate (13) and the tube fixing upper plate (12), wherein the upper half of the circular groove is provided in the tube fixing upper plate (12), and the lower half of the circular groove is provided in the tube fixing lower plate (13); the circular groove formed between the fixing wheel (5) and the rotating wheel (6) and the circular groove between the tube fixing upper plate (12) and the tube fixing lower plate (13) are in a straight line; The radius of the rotating wheel (6) must not be greater than the radius of the fixed wheel (5).

2. A small-diameter, thin-walled microtube continuous bending device according to claim 1, characterized in that: The upper plate (14) and the lower plate (15) are both provided with second countersunk waist holes (19) of the same length; the two rotating wheel fixing plates (22) are respectively fixedly connected to the upper plate (14) and the lower plate (15) via the second countersunk waist holes (19) and third bolts (20); and the rotating wheel fixing plates (22) are respectively located at two ends of the rotating wheel (6); a pin shaft (21) is provided inside the rotating wheel (6), and two ends of the pin shaft (21) are respectively rotatably connected to the rotating wheel fixing plates (22).

3. The small-diameter, thin-walled microtube continuous bending device according to claim 1 is characterized in that: The length control component (1) is provided with a through hole (8) penetrating the upper and lower surfaces, and the bottom plate (2) is provided with a linear first countersunk waist hole (9), and the positions of the first countersunk waist hole (9) and the through hole (8) correspond to each other in the upper and lower parts; the length control component (1) and the bottom plate (2) are fixedly connected via the first countersunk waist hole (9), the through hole (8), the first bolt (10) and the first nut (11).

4. The small-diameter, thin-walled microtube continuous bending device according to claim 1 is characterized in that: The portion of the upper end of the cylindrical pin (17) that protrudes from the upper plate (14) is rotatably connected to the handle fixing assembly (4).

5. The small-diameter, thin-walled microtube continuous bending device according to claim 1 is characterized in that: The upper plate (14) and the lower plate (15) are fixedly connected to the connecting plate (16) via fourth bolts (23) respectively.

6. The small-diameter, thin-walled microtube continuous bending device according to claim 1 is characterized in that: The handle fixing assembly (4) and the pipe fixing assembly (7) are fixedly connected to the base plate (2) via a second bolt (18); the handle fixing assembly (4) is located on the upper surface of the pipe fixing assembly (7).

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