A bend expansion process

Abstract

The application provides a bent pipe expansion process and belongs to the technical field of pipe processing. The bent pipe expansion process comprises a working box, a heating expansion mechanism, a driving mechanism, a bending forming mechanism and a material collecting mechanism. The working box is provided with a feeding port. The heating expansion mechanism comprises a first heating box arranged on the top of the working box and a second heating box arranged on the bottom plate of the working box. The first heating box is fixedly connected with a first lifting assembly and a first conveying hose. The first conveying hose is installed with a first heating half cylinder. The second heating box is fixedly connected with a second lifting assembly and a second conveying hose. The second conveying hose is installed with a second heating half cylinder. The application has the advantage of improving the quality of the bent pipe product.

Description

Technical Field

[0001] This invention belongs to the field of pipe processing technology, specifically a pipe bending expansion process. Background Technology

[0002] Pipe bending is performed using a complete set of bending equipment, and there are two processes: cold bending and hot bending. Most machines and pipelines use pipe bending, primarily for oil, gas, and liquid transportation, as well as in engineering bridge construction. Currently, straight pipes are generally processed into bends using methods such as stamping, rolling, and bending forming. However, stamping and rolling methods can easily cause localized deformation of the inner wall of the bend under pressure, reducing the internal space and affecting the quality of the finished product. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a pipe bending expansion process, which has the advantage of improving the quality of finished pipe bending products.

[0004] The objective of this invention can be achieved through the following technical solution: a pipe bending expansion process, the processing steps of which are as follows:

[0005] S1. Place the straight pipe between the two pipe positioning components through the feed port to fix and position the straight pipe;

[0006] S2. Move the straight tube between the first heating semi-cylinder and the second heating semi-cylinder via the first guide rail, and heat the straight tube through the first heating semi-cylinder and the second heating semi-cylinder;

[0007] S3. Move the heated straight tube to the bending forming mechanism. At the same time, the liquid in the storage box is transported into the heated straight tube through the conveying pipe. Since the material of the straight tube softens after heating, it has a certain property of expansion. After the filling liquid is filled, the straight tube gradually increases to the pre-calculated expected diameter. Then, the first lifting motor drives the hydraulic block to press the straight tube downward. If it is necessary to adjust the curvature of the straight tube, the position of the hydraulic block in the left and right directions can be adjusted on the second slide rail to press the straight tube down to make it into a bent tube with a certain curvature.

[0008] S4. Move the bent pipe to the collection mechanism for collection and storage. The collection mechanism has a discharge pipe to drain the liquid.

[0009] Preferably, the device includes a working box, a heating and expansion mechanism, a driving mechanism, a bending and forming mechanism, and a material collection mechanism;

[0010] The working box has a feed inlet. The heating and expansion mechanism includes a first heating box set at the top inside the working box and a second heating box set on the bottom plate of the working box. A first lifting assembly and a first conveying hose are fixedly connected to the first heating box. A first heating semi-cylinder is installed on the first conveying hose. A second lifting assembly and a second conveying hose are fixedly connected to the second heating box. A second heating semi-cylinder is installed on the second conveying hose.

[0011] The drive mechanism includes first drive motors disposed on the left and right sides of the working box, each first drive motor being drivenly connected to a first lead screw, first guide rails being installed on the left and right side walls inside the working box, first sliding blocks being slidably connected to the first guide rails, the first sliding blocks being also connected to the first lead screws, a telescopic rod being installed on the first sliding block, a tube positioning component being fixed to one end of the telescopic rod, a liquid storage box being installed on the first sliding block, a delivery pipe being fixedly connected to one side of the liquid storage box, one end of the delivery pipe being connected to the liquid storage box, and the other end being connected to the tube positioning component;

[0012] The bending forming mechanism includes a second slide rail located at the top of the work box, a first lifting motor and a lower pressing mold located on the bottom plate of the work box. A second sliding block is slidably connected to the second slide rail, and a hydraulic cylinder is fixedly connected to the second sliding block. A hydraulic block is connected to the hydraulic rod of the hydraulic cylinder. The lower pressing mold is installed on the lifting plate of the first lifting motor for forming the pipe.

[0013] Preferably, the material collection mechanism includes a material collection box, and the bottom plate inside the working box also has a limiting plate and two third guide rails in the same direction as the first guide rail. The material collection box is slidably connected on the third guide rails, and the material collection box can slide completely into the working box and abut against the limiting plate.

[0014] Preferably, the first lifting motor is fixed to the bottom plate of the work box by bolts, the lower pressing mold has a first arc-shaped groove, and the lower pressing mold is detachably connected to the first lifting motor by bolts, so as to facilitate the replacement of lower pressing molds with different first arc-shaped grooves.

[0015] Preferably, the tube positioning component includes a tube body, a limiting ring provided on the tube body, a conveying channel for conveying filling liquid and a nozzle for spraying the filling liquid inside the tube body, and a friction part on the tube body.

[0016] Preferably, the hydraulic block has an arc-shaped pressing portion, the arc-shaped pressing portion matching the curvature of the first arc-shaped groove.

[0017] Preferably, an observation plate is hinged to the work box via a hinge, the observation plate has an observation window and a first magnetic block, and a second magnetic block is also provided below the feed inlet of the work box. The observation window can seal the feed inlet of the work box, and the first magnetic block and the second magnetic block are magnetically connected.

[0018] Preferably, the collection box has a first inclined portion and a discharge pipe, and the bottom of the collection box has a first sliding portion, and the third guide rail has a first sliding groove, with the first sliding portion slidingly engaging with the first sliding groove.

[0019] Preferably, the first guide rail has a second sliding groove, the first sliding block has a second sliding part, and the second sliding part slides in cooperation with the second sliding groove.

[0020] Compared with the prior art, the advantages of the present invention are: 1. The first sliding block and the straight tube of the tube positioning component on the first sliding block are moved to the space between the first heating semi-cylinder and the second heating semi-cylinder by the first lead screw to soften the straight tube and make it easier to deform. The connection between the straight tube and the two tube positioning components can isolate the cavity inside the straight tube from the outside world to form a closed space. When bending, it can keep the inner wall of the bent tube from deforming significantly due to the pressure, which helps to prevent the phenomenon of local deformation of the tube wall after bending and greatly improves the quality of processing bent tubes and forming.

[0021] 2. The lower pressure mold and hydraulic block can be removed from the hydraulic rod of the first lifting motor and hydraulic cylinder respectively, which makes it easy to replace the lower pressure mold and hydraulic block with different arc and curvature. The first arc groove of the lower pressure mold matches the arc pressing part of the hydraulic block, which helps to make the tube expansion forming quality higher.

[0022] 3. The friction parts on the pipe body can increase the friction force and prevent one end of the straight pipe from slipping when it is inserted into both ends, making the straight pipe more secure. Attached Figure Description

[0023] Figure 1 This is a side sectional view of the present invention.

[0024] Figure 2 This is a cross-sectional view of section AA of the present invention.

[0025] Figure 3 This is a front view of the present invention.

[0026] Figure 4 This is a schematic diagram of the drive mechanism in this invention.

[0027] Figure 5 This is a schematic diagram of the tube positioning component in this invention.

[0028] Figure 6This is a cross-sectional view of the material collection box in this invention.

[0029] In the diagram, 2 is the working box; 21 is the feed inlet; 31 is the first heating box; 32 is the second heating box; 33 is the first lifting assembly; 34 is the first conveying hose; 35 is the first heating semi-cylinder; 36 is the second lifting assembly; 37 is the second conveying hose; 38 is the second heating semi-cylinder; 41 is the first drive motor; 42 is the first lead screw; 43 is the first guide rail; 431 is the second sliding groove; 44 is the first sliding block; 441 is the second sliding part; 45 is the telescopic rod; 46 is the pipe positioning component; 47 is the liquid storage box; 48 is the conveying pipe; and 51 is the second slide rail. 52. First lifting motor; 53. Lower pressing mold; 531. First arc-shaped groove; 54. Second sliding block; 55. Hydraulic cylinder; 56. Hydraulic block; 561. Arc-shaped lower pressing part; 61. Collection box; 611. Discharge pipe; 612. First inclined part; 613. First sliding part; 62. Limiting plate; 63. Third guide rail; 631. First sliding groove; 71. Pipe body; 72. Limiting ring; 73. Conveying channel; 74. Nozzle; 75. Friction part; 81. Observation plate; 82. Observation window; 83. First magnetic block; 84. Second magnetic block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 6 As shown, a pipe bending expansion process is described. The processing steps of this process are as follows: S1, the straight pipe is placed between two pipe positioning parts 46 through the feed port 21 to fix and position the straight pipe.

[0032] S2. Move the straight tube between the first heating semi-cylinder 35 and the second heating semi-cylinder 38 via the first guide rail 43, and heat the straight tube through the first heating semi-cylinder 35 and the second heating semi-cylinder 38.

[0033] S3. Move the heated straight tube to the bending forming mechanism. At the same time, the liquid in the storage box 47 is transported into the heated straight tube through the conveying pipe 48. Since the material of the straight tube softens after heating, it has a certain property of expansion. After the filling liquid is filled, the straight tube gradually increases to the pre-calculated expected diameter. Then, the first lifting motor 52 drives the hydraulic block 56 to press the straight tube downward. If it is necessary to adjust the curvature of the straight tube, the position of the hydraulic block 56 in the left and right directions can be adjusted on the second slide rail 51 to press the straight tube down to make it into a bent tube with a certain curvature.

[0034] S4. Move the bent pipe to the collection mechanism for collection and storage. The collection mechanism has a discharge pipe 611 for discharging the filling liquid, which can discharge the filling liquid to the outside.

[0035] This device includes a working box 2, a heating and expansion mechanism, a driving mechanism, a bending and forming mechanism, and a material collection mechanism. The working box 2 has a feed inlet 21. The heating and expansion mechanism includes a first heating box 31 disposed at the top of the working box 2 and a second heating box 32 disposed on the bottom plate of the working box 2. A first lifting assembly 33 and a first conveying hose 34 are fixedly connected to the first heating box 31. A first heating semi-cylinder 35 is installed on the first conveying hose 34. A second lifting assembly 36 and a second conveying hose 37 are fixedly connected to the second heating box 32. A second heating semi-cylinder 38 is installed on the second conveying hose 37. The driving mechanism... The mechanism includes first drive motors 41 located on the left and right sides of the working box 2. Each first drive motor 41 is connected to a first lead screw 42. First guide rails 43 are installed on the left and right side walls inside the working box 2. First sliding blocks 44 are slidably connected to the first guide rails 43. The first sliding blocks 44 can also be connected to the first lead screw 42. Telescopic rods 45 are installed on the first sliding blocks 44. One end of the telescopic rod 45 is fixed with a tube positioning component 46. A liquid storage box 47 is also installed on the first sliding block 44. A delivery pipe 48 is fixedly connected to one side of the liquid storage box 47. One end of the delivery pipe 48 is connected to the liquid storage box 47, and the other end is connected to the tube positioning component 46.

[0036] The bending forming mechanism includes a second slide rail 51 located at the top of the work box 2, a first lifting motor 52 and a lower pressing mold 53 located on the bottom plate of the work box 2. A second sliding block 54 is slidably connected to the second slide rail 51, and a hydraulic cylinder 55 is fixedly connected to the second sliding block 54. A hydraulic block 56 is connected to the hydraulic rod of the hydraulic cylinder 55. The lower pressing mold 53 is installed on the lifting plate of the first lifting motor 52 for forming the pipe.

[0037] In this invention, the first lifting component 33 and the second lifting component 36 are common lifting columns.

[0038] Using the above structure, the operator places the straight tube into the device through the feed port 21 of the work box, inserts the straight tube into the tube positioning member 46 on one side, and the tube positioning members 46 located at both ends of the straight tube can fix the straight tube by extending the telescopic rod 45. Then, the first lead screw 42 moves the first sliding block 44 and the straight tube of the tube positioning member 46 on the first sliding block 44 to the space between the first heating semi-cylinder 35 and the second heating semi-cylinder 38 for heating, so that the straight tube softens and is easier to deform. Then, the softened straight tube is moved to the bending and forming mechanism for pressing down the straight tube. The process involves bending and forming the tube. Before bending, the filling liquid in the storage box 47 is transported into the heated straight tube through the delivery pipe 48. This softens the material of the straight tube after heating, making it easier to bend. The connection between the straight tube and the two tube positioning parts 46 isolates the cavity inside the straight tube from the outside, forming a sealed space. After the filling liquid is added into the sealed space, the inner wall of the bent tube is kept as stable as possible during bending, preventing significant deformation of the tube wall after bending and greatly improving the quality of the bent tube and the forming process.

[0039] Specifically, such as Figures 1 to 6 As shown, the material collection mechanism includes a material collection box 61. The bottom plate inside the working box 2 also has a limiting plate 62 and two third guide rails 63 in the same direction as the first guide rail 43. The material collection box 61 is slidably connected on the third guide rails 63. The material collection box 61 can slide completely into the working box and abut against the limiting plate 62.

[0040] With the above structure, the bent pipe after pressing is transported to the top of the collection box 61 through the pipe positioning parts 46 set on both sides, and then falls into the collection box 61. The collection box 61 can be taken out or put in from the working box, and is provided with a limiting plate 62 to limit the maximum depth of the collection box 61, which is conducive to the convenient collection of the expanded and formed bent pipe and makes it easier to take out the bent pipe.

[0041] like Figures 1 to 6 As shown, the first lifting motor 52 is fixed to the base plate of the work box 2 by bolts. The lower pressing mold 53 has a first arc-shaped groove 531, and the lower pressing mold 53 is detachably connected to the first lifting motor 52 by bolts, which is used to facilitate the replacement of lower pressing molds 53 with different first arc-shaped grooves 531. The hydraulic block 56 has an arc-shaped pressing part 561, and the arc-shaped pressing part 561 matches the curvature of the first arc-shaped groove 531.

[0042] With the above structure, the pressing die 53 and the hydraulic block 56 can be removed from the hydraulic rod of the first lifting motor 52 and the hydraulic cylinder 55 respectively, which makes it easy to replace the pressing die 53 and the hydraulic block 56 with different curvatures and bends. Furthermore, the first arc-shaped groove 531 of the pressing die 53 matches the arc-shaped pressing part 561 of the hydraulic block 56, which helps to improve the quality of the tube expansion forming.

[0043] like Figures 1 to 6 As shown, the tube positioning component 46 includes a tube body 71, a limiting ring 72 provided on the tube body 71, a conveying channel 73 for conveying filling liquid and a nozzle 74 for spraying out the filling liquid inside the tube body 71, and a friction part 75 on the tube body 71.

[0044] With the above structure, the filling liquid is sprayed out through the nozzle 74 at one end of the delivery pipe 48 to fill the closed space of the bend pipe, and the friction part 75 on the pipe body 71 can increase the friction force, preventing one end of the straight pipe from slipping when it is inserted at both ends, and fixing the straight pipe more securely.

[0045] like Figures 1 to 6 As shown, an observation plate 81 is hinged to the working box 2 via a hinge. The observation plate 81 has an observation window 82 and a first magnetic block 83. A second magnetic block 84 is also provided below the feed inlet 21 of the working box 2. The observation window 82 can seal the feed inlet 21 of the working box 2. The first magnetic block 83 and the second magnetic block 84 are magnetically connected.

[0046] With the above structure, the process of tube bending and expansion can be observed in real time through the observation window 82. The feed port 21 can be opened or sealed through the observation plate 81 to prevent the filling liquid from bursting out and splashing onto the operator during tube bending and expansion, making it safer.

[0047] like Figures 1 to 6 As shown, the collection box 61 has a first inclined part 612 and a discharge pipe 611, and the bottom of the collection box 61 has a first sliding part 613. The third guide rail 63 has a first sliding groove 631, and the first sliding part 613 and the first sliding groove 631 slide in cooperation.

[0048] With the above structure, a discharge port is provided on one side of the processing box. The collection box 61 can move on the first sliding groove 631 of the third guide rail 63 through the first sliding part 613, so as to take out or put into the processing box, which is conducive to conveniently taking out the bent tube finished product. The first inclined part 612 can transport the filling liquid in the bent tube to the discharge pipe 611, and then discharge the filling liquid from the discharge pipe 611.

[0049] like Figures 1 to 6 As shown, the first guide rail 43 has a second sliding groove 431, and the first sliding block 44 has a second sliding part 441, which slides in conjunction with the second sliding groove 431.

[0050] With the above structure, by setting the second sliding part 441, the first sliding block 44 can move automatically in the front and back direction on the first guide rail 43, which facilitates the rapid progress of the pipe bending process and improves processing efficiency.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0052] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Meanwhile, the word "and / or" throughout the text means including three solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0053] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0054] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A pipe bending expansion process, characterized in that, The processing steps of this process are as follows: S1, place the straight pipe between two pipe positioning parts (46) through the feed port (21) to fix and position the straight pipe; S2. Move the straight tube between the first heating semi-cylinder (35) and the second heating semi-cylinder (38) via the first guide rail (43) and heat the straight tube through the first heating semi-cylinder (35) and the second heating semi-cylinder (38); S3. Move the heated straight tube to the bending forming mechanism. At the same time, the liquid in the storage box (47) is transported into the heated straight tube through the conveying pipe (48). Since the material of the straight tube softens after heating, it has a certain expansion property. After the filling liquid is filled, the straight tube gradually becomes larger to the pre-calculated expected diameter. Then, the hydraulic rod (55) drives the hydraulic block (56) to press the straight tube downward. If it is necessary to adjust the straight tube to a greater degree of curvature, adjust the position of the hydraulic block (56) in the left and right directions on the second slide rail (51) to press the straight tube down to make it a bent tube with a certain degree of curvature. S4. Move the bent pipe to the collection mechanism for collection and storage. The collection mechanism has a discharge pipe (611) to discharge the liquid. The apparatus for using this process includes a working box (2), a heating and expansion mechanism, a driving mechanism, a bending and forming mechanism, and a material collection mechanism; The working box (2) has a feed inlet (21). The heating and expansion mechanism includes a first heating box (31) set at the top inside the working box (2) and a second heating box (32) set on the bottom plate of the working box (2). A first lifting assembly (33) and a first conveying hose (34) are fixedly connected to the first heating box (31). A first heating semi-cylinder (35) is installed on the first conveying hose (34). A second lifting assembly (36) and a second conveying hose (37) are fixedly connected to the second heating box (32). A second heating semi-cylinder (38) is installed on the second conveying hose (37). The driving mechanism includes a first drive motor (41) disposed on the left and right sides of the working box (2). Each first drive motor (41) is connected to a first lead screw (42). A first guide rail (43) is installed on the left and right side walls inside the working box (2). A first sliding block (44) is slidably connected on the first guide rail (43). The first sliding block (44) is connected to the first lead screw (42). A telescopic rod (45) is installed on the first sliding block (44). A tube positioning component (46) is fixed at one end of the telescopic rod (45). A liquid storage box (47) is also installed on the first sliding block (44). A delivery pipe (48) is fixedly connected to one side of the liquid storage box (47). One end of the delivery pipe (48) is connected to the liquid storage box (47), and the other end is connected to the tube positioning component (46). The bending forming mechanism includes a second slide rail (51) located on the top of the work box (2), a first lifting motor (52) and a lower pressing mold (53) located on the bottom plate of the work box (2). A second sliding block (54) is slidably connected on the second slide rail (51), and a hydraulic cylinder (55) is fixedly connected on the second sliding block (54). A hydraulic block (56) is connected to the hydraulic rod on the hydraulic cylinder (55). The lower pressing mold (53) is installed on the lifting plate of the first lifting motor (52) for forming straight pipes. The material collection mechanism includes a material collection box (61). The bottom plate inside the working box (2) also has a limiting plate (62) and two third guide rails (63) in the same direction as the first guide rail (43). The material collection box (61) is slidably connected on the third guide rail (63). The material collection box (61) can slide completely into the working box (2) and abut against the limiting plate (62).

2. The pipe bending expansion process according to claim 1, characterized in that, The first lifting motor (52) is fixed to the bottom plate of the work box (2) by bolts. The lower pressing mold (53) has a first arc-shaped groove (531) and the lower pressing mold (53) is detachably connected to the first lifting motor (52) by bolts, so as to facilitate the replacement of lower pressing molds (53) with different first arc-shaped grooves (531).

3. The pipe bending expansion process according to claim 1, characterized in that, The tube positioning component (46) includes a tube body (71), a limiting ring (72) provided on the tube body (71), a conveying channel (73) for conveying filling liquid and a nozzle (74) for spraying out filling liquid are provided in the tube body (71), and a friction part (75) is also provided on the tube body (71).

4. The pipe bending expansion process according to claim 2, characterized in that, The hydraulic block (56) has an arc-shaped pressing part (561) that matches the curvature of the first arc-shaped groove (531).

5. The pipe bending expansion process according to claim 1, characterized in that, The work box (2) is hinged to an observation plate (81) by a hinge. The observation plate (81) has an observation window (82) and a first magnetic block (83). The work box (2) also has a second magnetic block (84) below the feed inlet (21). The observation window (82) can seal the feed inlet (21) of the work box (2). The first magnetic block (83) and the second magnetic block (84) are magnetically connected.

6. The pipe bending expansion process according to claim 2, characterized in that, The collection box (61) has a first inclined part (612) and a discharge pipe (611), and the bottom of the collection box (61) has a first sliding part (613). The third guide rail (63) has a first sliding groove (631), and the first sliding part (613) and the first sliding groove (631) slide together.

7. The pipe bending expansion process according to claim 1, characterized in that, The first guide rail (43) has a second sliding groove (431), and the first sliding block (44) has a second sliding part (441), which slides in cooperation with the second sliding groove (431).

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