Upsetting expansion forming equipment for large-size round pipe fitting
By using a large-size round tube forming equipment, high-pressure gas inside the mold is used to form corrugations, which solves the problems of low forming efficiency and environmental pollution of large-size round tubes and achieves efficient and clean corrugation forming.
Patent Information
- Application Number
- CN202422984062.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-04
AI Technical Summary
Existing technologies for forming large-sized round tubes suffer from high costs, low efficiency, welding stress, and environmental pollution. In particular, hydroforming equipment is inefficient and unsanitary when the diameter is over 300 mm.
Using a large-size round tube upsetting forming equipment, the left outer mold, right outer mold, left inner mold and right inner mold move in coordination, and high pressure gas is used to form corrugations in the mold. Combined with automated loading and unloading and high pressure gas medium, the corrugation is formed efficiently.
It achieves efficient forming of large-size round tubes with a forming efficiency of up to 3 seconds per waveform, low energy consumption, high dimensional accuracy, high degree of automation, and a clean and pollution-free forming process.
Smart Images
Figure CN223556970U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of round pipe forming equipment, and in particular to a large-size round pipe forming equipment. Background Technology
[0002] Round pipe fittings refer to thin-walled round pipe blanks. Many devices are available for forming corrugated round pipe fittings, used in various industrial production fields, such as hydraulic hoses and corrugated pipes. High-pressure forming is a mature process with a long history of application and a wide range of uses. Corrugated equipment is also readily available. The forming principle involves internal filling with high-pressure liquid for support, without external corrugated molds. When the pressure reaches a sufficiently high level, the material deforms, forming a corrugation of a certain size, relying solely on high-pressure tension for forming. However, all equipment can only form pipes up to approximately 300mm in diameter, and the high-pressure filling medium is always liquid. For forming corrugated pipes with a diameter of 300mm, there are two existing forming methods: The first is to stamp two pieces to the required shape and then weld them together. This method has disadvantages such as high cost, low efficiency, and welding stress that can cause corrugation deformation. The second is hydraulic forming, with forming pressures exceeding 20MPa. This method has disadvantages such as a poor working environment and the potential for splashing and leakage, resulting in an unclean environment. Utility Model Content
[0003] To overcome the shortcomings of existing technologies, a large-size round tube forming equipment is proposed to solve the problems mentioned in the background technology.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0005] An upsetting and forming device for large-size round tubes includes a base. A left fixed frame and a right fixed frame are fixedly arranged at a distance from each other in the middle of the upper part of the base. A slide rail is provided between the left and right fixed frames. A left slider and a right slider are slidably connected on the slide rail. A left outer mold for clamping or moving away from the outer surface of the round tube is provided on the side of the left slider near the right slider. A right outer mold for clamping or moving away from the outer surface of the round tube is provided on the side of the right slider near the left slider. A left inner mold is provided inside the left outer mold and is mounted on a left moving mechanism. A left expansion sealing ring is provided on the left inner mold. A right inner mold is provided inside the right outer mold and is mounted on a right moving mechanism. A right expansion sealing ring is provided on the right inner mold. A cavity is provided between the left and right expansion sealing rings. A high-pressure air chamber is formed between the cavity and the round tube, and the high-pressure air chamber has an air port.
[0006] As a further technical solution of this utility model: four left outer molds are provided, and each left outer mold is driven to move by a left outer mold oil cylinder. The four left outer molds can move towards the center at the same time to form a circle that matches the outer wall of the round pipe.
[0007] There are four right outer molds, each driven by a right outer mold cylinder. The four right outer molds move towards the center at the same time to form a circle that fits the outer wall of the round pipe.
[0008] As a further technical solution of this utility model: the inward end of the left outer mold is a left arc part, and the inward end of the right outer mold is connected to a retaining arc part that is adapted to the corrugation formed by the round tube part. A right arc part that is adapted to the left arc part is provided on the side of the retaining arc part close to the left arc part. The right arc part and the retaining arc part are connected by a connecting plate.
[0009] As a further technical solution of this utility model: the left moving mechanism includes a feeding trolley disposed on the left side of the base. The feeding trolley is driven by a drive mechanism to move left and right along the base. A left connecting cylinder is fixedly connected to the right side of the feeding trolley. A left inner mold mounting seat is disposed at the end of the left connecting cylinder away from the feeding trolley. A left inner mold is connected to the left inner mold mounting seat. A trolley connecting frame that is detachably connected to the feeding trolley is also fixedly disposed on the base. The trolley connecting frame is located on the left side of the left fixed frame. A left crossbeam is fixedly connected to the side of the trolley connecting frame closer to the left fixed frame. The other end of the left crossbeam is fixedly connected to the left slider.
[0010] As a further technical solution of this utility model: the right moving mechanism includes a right crossbeam, which is located on the right side of the right fixed frame and fixedly connected to the right fixed frame. A right connecting cylinder is fixedly connected to the right crossbeam, and a right inner mold mounting seat is provided at the left end of the right connecting cylinder. A right inner mold is mounted on the right inner mold mounting seat.
[0011] As a further technical solution of this utility model: the left slider is driven by the left slider cylinder along the slide rail, and the right slider is driven by the right slider cylinder to slide along the slide rail.
[0012] As a further technical solution of this utility model: a lifting bracket for supporting round pipes is provided below the left crossbeam. The lifting bracket includes a mounting base, and a lifting plate is provided above the mounting base. The lifting plate is driven to rise and fall by a telescopic rod, and a pipe support is detachably connected to the upper surface of the lifting plate.
[0013] As a further technical solution of this utility model: an opening for the entry and exit of a round pipe is provided above the left crossbeam.
[0014] The beneficial effects of this utility model are:
[0015] This invention can form corrugations in the radial direction of large round pipes. The corrugations are formed by the coordinated movement of the left inner mold, left outer mold, right inner mold, and right outer mold. It has the advantages of high forming efficiency (3 seconds per corrugation), low energy consumption, corrugation forming within the mold, high dimensional accuracy, and high degree of automation. It can automatically load and unload materials, automatically complete the forming action according to the corrugation spacing, and ensure the dimensional and shape accuracy of the formed corrugations. The forming process uses high-pressure gas as the support medium, which is clean and pollution-free. It can form large workpieces, up to φ800mm, and is suitable for corrugation forming of large-sized round pipes. Attached Figure Description
[0016] Figure 1 This is a three-dimensional schematic diagram of the main structure of this utility model;
[0017] Figure 2 for Figure 1 A magnified view of part A in the image;
[0018] Figure 3 A three-dimensional schematic diagram of the main structure of this utility model after the left inner mold and the right inner mold are fitted together;
[0019] Figure 4 Figure 3 A magnified view of part B in the image;
[0020] Figure 5 This is a schematic diagram of the main structure after the left and right inner molds are fitted together.
[0021] Figure 6 This is a schematic diagram of the main structure during ripple formation;
[0022] Figure 7 This is a schematic diagram of the main structure of the lifting bracket;
[0023] Figure 8 This is a schematic diagram of the main structure of the left outer mold and the left outer mold cylinder.
[0024] In the diagram: 1-Base, 21-Left fixed frame, 22-Right fixed frame, 23-Slide rail, 24-Left slider, 25-Right slider, 26-Left slider cylinder, 27-Right slider cylinder, 31-Left outer mold, 32-Right outer mold, 33-Left outer mold cylinder, 34-Right outer mold cylinder, 35-Left arc component, 36-Clip arc component, 37-Right arc component, 38-Connecting plate, 41-Left inner mold, 42-Right inner mold, 4 3-Left expansion seal ring, 44-Right expansion seal ring, 45-High pressure air chamber, 46-Air port, 47-Left inner mold mounting seat, 48-Right inner mold mounting seat, 51-Feeding trolley, 52-Left connecting cylinder, 53-Trolley connecting frame, 54-Left crossbeam, 55-Right crossbeam, 56-Right connecting cylinder, 6-Lifting bracket, 61-Mounting seat, 62-Lifting plate, 63-Telescopic rod, 64-Pipe support, 7-Round pipe fitting. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Reference Figure 1-8 A large-size round tube forming device includes a base 1. A left fixed frame 21 and a right fixed frame 22 are fixedly arranged at a distance from each other on the upper center of the base 1. Four slide rails 23 are arranged between the left and right fixed frames 21 and 22, respectively located at the four corners of the left and right fixed frames 21 and 22. A left slider 24 and a right slider 25 are slidably connected to the slide rails 23. The left slider 24 is driven along the slide rail 23 by a left slider cylinder 26, and the right slider 25 is driven along the slide rail 23 by a right slider cylinder 27.
[0027] The left slider 24 is provided with a left outer mold 31 on the side near the right slider 25 for clamping or moving away from the outer side of the round tube 7. There are four left outer molds 31. Each left outer mold 31 is driven to move by a left outer mold cylinder 33. The four left outer molds 31 can move towards the center at the same time to form a circle that fits the outer wall of the round tube 7. The inward end of the left outer mold 31 is a left arc part 35, and the left arc part 35 is consistent with the corrugation of the round tube 7.
[0028] The right slider 25, near the left slider 24, has a right outer mold 32 for clamping and moving away from the outer surface of the circular tube 7. There are four right outer molds 32, each driven by a right outer mold cylinder 34. The four right outer molds 32 move simultaneously towards the center to form a circle that fits the outer wall of the circular tube 7. One end of the right outer mold 32 is connected to a retaining arc member 36 that matches the corrugations formed on the circular tube 7. When forming the next corrugation, the retaining arc member 36 precisely catches the previous corrugation. Near the left circular arc member 35, near the retaining arc member 36, is a right circular arc member 37 that matches the left circular arc member 35. The right circular arc member 37 and the retaining arc member 36 are connected by a connecting plate 38. The arc formed by the left circular arc member 35 and the right circular arc member 37 is the same as the arc of the corrugated tube.
[0029] A left inner mold 41 is provided inside the left outer mold 31. A left expansion sealing ring 43 is provided on the left inner mold 41. The left inner mold 41 is mounted on a left moving mechanism. The left moving mechanism includes a feeding trolley 51 located on the left side of the base 1. The feeding trolley 51 is driven by a drive mechanism to move left and right along the base 1. A guide rail for the movement of the feeding trolley 51 is provided inside the base 1. A left connecting cylinder 52 is fixedly connected to the right side of the feeding trolley 51. A left inner mold mounting seat 47 is provided at the end of the left connecting cylinder 52 away from the feeding trolley 51. The left inner mold 41 is connected to the left inner mold mounting seat 47. A trolley connecting frame 53 that is detachably connected to the feeding trolley 51 is also fixedly provided on the base 1. The trolley connecting frame 53 is located on the left side of the left fixed frame 21. A left crossbeam 54 is fixedly connected to the side of the trolley connecting frame 53 closest to the left fixed frame 21. The other end of the left crossbeam 54 is fixedly connected to the left slider 24. An opening for the entry and exit of the round tube 7 is provided above the left crossbeam 54.
[0030] A right inner mold 42 is provided inside the right outer mold 32. A right expansion sealing ring 44 is provided on the right inner mold 42. The right inner mold 42 is mounted on a right moving mechanism. The right moving mechanism includes a right crossbeam 55, which is located on the right side of the right fixed frame 22 and is fixedly connected to the right fixed frame 22. A right connecting cylinder 56 is fixedly connected to the right crossbeam 55. A right inner mold mounting seat 48 is provided at the left end of the right connecting cylinder 56, and the right inner mold 42 is mounted on the right inner mold mounting seat 48. The right inner mold 42, right connecting cylinder 56, right crossbeam 55, and right fixed frame 22 are a fixed whole. A cavity is provided between the left expansion sealing ring 43 and the right expansion sealing ring 44. The cavity and the circular tube 7 form a high-pressure air chamber 45. The high-pressure air chamber 45 has an air port 46.
[0031] Below the left crossbeam 54, there is a lifting bracket 6 for supporting the round pipe 7. The lifting bracket 6 includes a mounting base 61, and a lifting plate 62 is provided above the mounting base 61. The lifting plate 62 is driven to rise and fall by a telescopic rod 63. A pipe support 64 is detachably connected to the upper end face of the lifting plate 62.
[0032] Specific embodiments of this utility model:
[0033] Initially, the feeding trolley 51 and the trolley connecting frame 53 are separated. The feeding trolley 51 is located to the left of the trolley connecting frame 53. The round tube 7 is inserted into the opening above the left crossbeam 54 using a crane. The feeding trolley 51 moves to the right, which simultaneously drives the left connecting cylinder 52, the left inner mold mounting seat 47, and the left inner mold 41 to move to the right. The left connecting cylinder 52, the left inner mold mounting seat 47, and the left inner mold 41 will continuously move into the inner cavity of the round tube 7 until they move to the rightmost corrugated position to be formed. At this point, the left expansion sealing ring 43 expands and clamps the round tube 7. The feeding trolley 51 continues to move to the right until it reaches the position of the trolley connecting frame 53. The feeding trolley 51 and the trolley connecting frame 53 are locked together with a locking pin. The feeding trolley 51, the trolley connecting frame 53, the left crossbeam 54, the left slider 24, the left connecting cylinder 52 and the left inner mold 41 are connected into a whole. The left slider 24 is also equipped with a left outer mold 31. Moving to the left can realize the simultaneous movement of the left outer mold 31 and the left inner mold 41.
[0034] When the first corrugation is formed, the right outer mold 32 abuts against the round tube 7 under the drive of the right outer mold cylinder 34, and this end is fixed; there is a certain length between the left outer mold 31 and the right outer mold 32, and the left outer mold 31 and the left inner mold 41 cooperate to abut against the round tube 7; then the left expansion sealing ring 43 and the right expansion sealing ring 44 both expand and clamp the round tube 7, and high-pressure gas is pushed into the high-pressure air chamber 45 through the air port 46. At the same time, the left slider cylinder 26 drives the left slider 24 to move to the right, and the left outer mold 31 and the left inner mold 41 clamp the round tube 7 and move to the right. Because the right end is fixed at this time, the first corrugation is formed.
[0035] After one ripple is formed, refer to Figure 6 When the left expansion sealing ring 43 contracts and no longer clamps the round tube 7, the left outer mold 31 shortens under the drive of the left outer mold cylinder 33 and moves away from the round tube 7. At this time, the right expansion sealing ring 44 expands and presses against the round tube 7, and the right outer mold 32 and the right inner mold 42 cooperate to clamp the round tube 7.
[0036] The left slider cylinder 26 drives the left slider 24 to move to the left, and the left outer mold 31 and the left inner mold 41 move to the left at the same time, moving to the position of one wave pitch; the left outer mold 31 extends under the drive of the left outer mold cylinder 33 and abuts against the round tube 7; the left expansion sealing ring 43 expands and clamps the round tube 7.
[0037] The right expansion sealing ring 44 contracts and no longer clamps the round tube 7. The right outer mold 32 moves away from the round tube 7 under the drive of the right outer mold cylinder 34. At this time, the round tube 7 is only clamped by the left outer mold 31 and the left inner mold 41. The left slider cylinder 26 drives the left slider 24 to move to the right. The left outer mold 31 and the left inner mold 41 clamp the round tube 7 and move to the right to a suitable distance and stop. The right outer mold 32 abuts against the round tube 7 under the drive of the right outer mold cylinder 34, and this end is fixed.
[0038] Then, both the left expansion sealing ring 43 and the right expansion sealing ring 44 expand and clamp the round tube 7, and high-pressure gas is injected into the high-pressure air chamber 45 through the air port 46. At the same time, the left slider cylinder 26 drives the left slider 24 to move to the right, and the left outer mold 31 and the left inner mold 41 clamp the round tube 7 and move to the right. Since the right end is in a fixed state at this time, corrugations are formed. The left inner mold 41 and the right inner mold 42 approach and cooperate to form corrugations. By repeating the operation in sequence, multiple corrugations can be formed.
[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A large-size round tube forming equipment, comprising a base (1), characterized in that: A left fixed frame (21) and a right fixed frame (22) are fixedly arranged at a distance from each other in the middle of the upper part of the base (1). A slide rail (23) is arranged between the left fixed frame (21) and the right fixed frame (22). A left slider (24) and a right slider (25) are slidably connected on the slide rail (23). A left outer mold (31) for clamping or moving away from the outer side of the round tube (7) is provided on the side of the left slider (24) near the right slider (25). A right outer mold (32) for clamping and moving away from the outer side of the round tube (7) is provided on the side of the right slider (25) near the left slider (24). A left inner mold (41) is provided inside the left outer mold (31). The left inner mold (41) is installed on the left moving mechanism. A left expansion sealing ring (43) is provided on the left inner mold (41). A right inner mold (42) is provided inside the right outer mold (32). The right inner mold (42) is installed on the right moving mechanism. A right expansion sealing ring (44) is provided on the right inner mold (42). A cavity is provided between the left expansion sealing ring (43) and the right expansion sealing ring (44). A high-pressure air chamber (45) is formed between the cavity and the round pipe (7). An air port (46) is opened in the high-pressure air chamber (45).
2. The large-size round tube forming equipment according to claim 1, characterized in that: There are four left outer molds (31), each of which is driven to move by a left outer mold cylinder (33). The four left outer molds (31) can move towards the center at the same time to form a circle that matches the outer wall of the round pipe (7). There are four right outer molds (32), each of which is driven by a right outer mold cylinder (34). The four right outer molds (32) can move towards the center at the same time to form a circle that matches the outer wall of the round pipe (7).
3. The large-size round tube forming equipment according to claim 2, characterized in that: The left outer mold (31) has a left arc part (35) at one end inward, and the right outer mold (32) has an arc part (36) at one end inward that is adapted to the corrugations formed by the round tube part (7). The arc part (36) has a right arc part (37) adapted to the left arc part (35) on the side close to the left arc part (35). The right arc part (37) and the arc part (36) are connected by a connecting plate (38).
4. The large-size round tube upsetting forming equipment according to claim 2, characterized in that: The left moving mechanism includes a feeding trolley (51) located on the left side of the base (1). The feeding trolley (51) is driven by a drive mechanism to move left and right along the base (1). A left connecting cylinder (52) is fixedly connected to the right side of the feeding trolley (51). A left inner mold mounting seat (47) is provided at the end of the left connecting cylinder (52) away from the feeding trolley (51). A left inner mold (41) is connected to the left inner mold mounting seat (47). A trolley connecting frame (53) that can be detachably connected to the feeding trolley (51) is also fixedly provided on the base (1). The trolley connecting frame (53) is located on the left side of the left fixed frame (21). A left crossbeam (54) is fixedly connected to the side of the trolley connecting frame (53) close to the left fixed frame (21). The other end of the left crossbeam (54) is fixedly connected to the left slider (24).
5. The large-size round tube forming equipment according to claim 4, characterized in that: The right moving mechanism includes a right crossbeam (55), which is located on the right side of the right fixed frame (22) and is fixedly connected to the right fixed frame (22). A right connecting cylinder (56) is fixedly connected to the right crossbeam (55), and a right inner mold mounting seat (48) is provided at the left end of the right connecting cylinder (56). A right inner mold (42) is installed on the right inner mold mounting seat (48).
6. The upsetting and forming equipment for large-size round tubes according to claim 1, characterized in that: The left slider (24) is driven by the left slider cylinder (26) along the slide rail (23), and the right slider (25) is driven by the right slider cylinder (27) along the slide rail (23).
7. The large-size round tube upsetting forming equipment according to claim 4, characterized in that: Below the left crossbeam (54) is a lifting bracket (6) for supporting the round pipe fitting (7). The lifting bracket (6) includes a mounting base (61). Above the mounting base (61) is a lifting plate (62). The lifting plate (62) is driven to lift by a telescopic rod (63). The upper end face of the lifting plate (62) is detachably connected to a pipe support (64).
8. The large-size round tube upsetting forming equipment according to claim 4, characterized in that: An opening is provided above the left crossbeam (54) for the round pipe fitting (7) to enter and exit.