Metal corrugated pipe forming machine

Abstract

The utility model relates to a metal bellows forming machine which comprises a machine frame, a forming lower die, a forming upper die and a forming diaphragm, the forming upper die comprises a first rotating frame, a second rotating frame and a locking mechanism, and the first rotating frame, the second rotating frame and the locking mechanism are respectively provided with a positioning column. The first rotating frame and the second rotating frame are arranged on the rotating shaft, and spiral blade structures are rotationally connected onto the first rotating frame and the second rotating frame. The forming membrane has the advantages that the first rotating frame and the second rotating frame are arranged on the rotating shaft, so that the forming membrane can be opened and closed along with the opening and closing actions of the first rotating frame and the second rotating frame; the spiral blade structure is arranged on the forming diaphragm, the lifting action of the forming diaphragm is realized through the spiral blade structure, the automatic arrangement of the forming diaphragm is realized, the mounting process of the forming diaphragm is simplified, and when the secondary expansion operation is carried out, only the spiral blade structure needs to be rotated to exit, so that the spiral blade structure does not form spatial interference on the pressing action of the forming diaphragm; and the overall working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe processing equipment, specifically to a metal corrugated pipe forming machine. Background Technology

[0002] Metal corrugated pipes are installed in liquid transportation systems as a type of flexible pressure-resistant pipe fitting to compensate for the mutual displacement of pipe or machine / equipment connection ends, absorb vibration energy, and play a role in vibration reduction and noise reduction. They have many characteristics such as good flexibility, light weight, corrosion resistance, fatigue resistance, and high and low temperature resistance.

[0003] Existing metal corrugated pipes are manufactured using a manual forming machine. This machine uses a circular template for forming, with positioning relying on four guide pillars. During operation, the metal sleeve is placed inside the lower forming mold, and the circular template and inserts are sequentially placed on the forming pipe according to the designed quantity, spaced equidistantly. After the first hydraulic expansion, the inserts must be removed before the second hydraulic expansion can be performed. After forming is complete, the circular templates must be removed sequentially, which greatly reduces the efficiency of the entire forming process. Moreover, the workload of the operators is high. In addition, to ensure disassembly, the gap between the guide pillars and the circular template is relatively large, resulting in poor axial accuracy. Furthermore, the guide pillars are prone to wear, thus reducing the service life of the forming machine. Utility Model Content

[0004] The purpose of this invention is to solve the problem of low working efficiency of the forming machine caused by the manual installation of the circular template. It proposes a metal corrugated pipe forming machine, which realizes the opening and closing of the forming diaphragm through a first rotating frame, a second rotating frame and a locking mechanism, and realizes the lifting of the forming diaphragm through a spiral blade structure, thereby achieving automatic arrangement of the forming diaphragm and greatly improving the working efficiency of the forming machine.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A metal corrugated pipe forming machine includes a frame, a lower forming die, an upper forming die, and a forming diaphragm. The lower forming die is slidably connected to the frame. The upper forming die includes a rotating shaft, a first rotating frame, a second rotating frame, and a locking mechanism. The rotating shaft is mounted on the frame, and both the first and second rotating frames are rotatably connected to the rotating shaft. The locking mechanism is mounted on either the first or second rotating frame. Each of the first, second, and locking frames has a positioning post for mounting the forming diaphragm, and the forming diaphragm can slide up and down along the positioning post. The frame is equipped with a driving mechanism for simultaneously rotating the first and second rotating frames. The frame is also equipped with a pressing assembly. Both the first and second rotating frames are rotatably connected to a spiral blade structure for pushing the forming diaphragm up. The spiral blade structure has an avoidance notch for the forming diaphragm to slide during a second expansion pressing.

[0007] Preferably, the drive mechanism includes a mounting frame and a first hydraulic cylinder. The mounting frame is fixedly connected to the frame, and the first hydraulic cylinder is fixedly connected to the mounting frame. The piston rod of the first hydraulic cylinder is provided with a connecting rod assembly that drives the first rotating frame and the second rotating frame to rotate synchronously.

[0008] Preferably, both the first and second rotating frames are provided with a rotating shaft with a helical blade structure, and the mounting frame is provided with a drive assembly for driving the two rotating shafts to rotate simultaneously.

[0009] Preferably, the drive assembly includes a second hydraulic cylinder, a connecting sleeve, and a drive rod. The second hydraulic cylinder is fixedly connected to the mounting bracket. One end of the drive rod is mounted on the connecting sleeve, and the other end of the drive rod is provided with a rack. The rotating shaft is provided with a gear that meshes with the rack for transmission.

[0010] Preferably, the drive rod is provided with a first guide rod, and the first rotating frame or / and the second rotating frame are provided with guide through holes that cooperate with the first guide rod.

[0011] Preferably, the helical blade structure includes at least two blades, each blade having the clearance notch, and the rotating shaft having an adjusting shim and / or an adjusting nut, the adjusting shim and / or the adjusting nut being disposed between two adjacent blades.

[0012] Preferably, the locking mechanism includes a base, a third hydraulic cylinder, and a push rod. The base is fixedly connected to the first rotating frame, the third hydraulic cylinder is fixedly connected to the base, the push rod is fixedly connected to the piston rod of the third hydraulic cylinder, the push rod is provided with a bracket for fixing the positioning column, the push rod is provided with a second guide rod, and the base is provided with a guide sleeve that cooperates with the second guide rod.

[0013] Preferably, the pressing assembly includes a fixed frame, a fourth hydraulic cylinder, and a vertical sliding plate. The fixed frame is fixedly connected to the frame, the vertical sliding plate is movably connected to the fixed frame, the fourth hydraulic cylinder is disposed on the vertical sliding plate, the fixed frame is provided with a fifth hydraulic cylinder connected to the vertical sliding plate, and the piston rod of the fourth hydraulic cylinder is provided with a pressure sleeve.

[0014] Preferably, the lower forming mold includes a slider and a fixed post disposed on the slider, the fixed post having a fixed cavity, the frame having a sliding groove, and the slider being slidably connected to the sliding groove.

[0015] Preferably, the slide groove is provided with a guide boss, the slider is provided with a guide groove that cooperates with the guide boss, and the guide boss and / or the guide groove are provided with an inductive switch. The frame is provided with a controller connected to the inductive switch, and the controller is connected to the drive mechanism.

[0016] In summary, the advantages of this utility model are as follows: The upper molding die is configured as a structure consisting of a rotating shaft, a first rotating frame, a second rotating frame, and a locking mechanism. The molding film is mounted on the first rotating frame, the second rotating frame, and the locking mechanism via positioning pins. Since the first and second rotating frames are mounted on the rotating shaft, the molding film can open and close with the opening and closing movements of the first and second rotating frames. The lifting action of the molding film is achieved through the rotating helical blade structure on the first and second rotating frames, thus realizing automatic arrangement of the molding film and greatly simplifying the installation process. Furthermore, the locking mechanism effectively locks the molding film, preventing separation during the pressing process and significantly improving molding quality. Additionally, the positioning... The column not only enables rapid installation of the forming diaphragm but also ensures its coaxiality. Secondly, during the second expansion operation, the spiral blade structure has an avoidance notch, allowing it to simply be rotated out of the machine. This prevents the spiral blade structure from interfering with the downward pressing action of the forming diaphragm, improving overall work efficiency. Furthermore, the drive mechanism enables synchronous rotation of the first and second rotating frames, ensuring the stability of the forming diaphragm's opening and closing. Finally, the lower forming mold and the frame are slidably connected. Since the upper forming mold is an openable structure, it does not interfere with the lower forming mold, significantly improving sample loading and unloading efficiency, and further enhancing operator efficiency. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a metal corrugated pipe forming machine according to the present invention;

[0019] Figure 2 for Figure 1 The main view;

[0020] Figure 3 for Figure 2 A sectional view;

[0021] Figure 4 for Figure 1 A magnified view of part I;

[0022] Figure 5 This is a schematic diagram of the drive component in this utility model;

[0023] Figure 6 This is a schematic diagram of the blade structure in this utility model;

[0024] Figure 7 This is a schematic diagram of the lower forming mold in this utility model;

[0025] Figure 8 This is a schematic diagram of the structure when the formed diaphragm is closed;

[0026] Figure 9 This is a schematic diagram of the structure when the molded diaphragm is opened.

[0027] Figure label:

[0028] 1. Frame, 11. Slide groove, 12. Guide boss, 13. Controller, 2. Lower forming die, 21. Slider, 22. Fixing post, 23. Fixing cavity, 24. Guide groove, 25. Handle, 3. Upper forming die, 31. Rotating shaft, 32. First rotating frame, 33. Second rotating frame, 34. Locking mechanism, 341. Base, 342. Third hydraulic cylinder, 343. Push rod, 344. Bracket, 345. Second guide rod, 346. Guide sleeve, 35. Positioning post, 36. Rotating shaft, 37. Gear, 38. Guide through hole, 4. Forming diaphragm, 41. First template, 42. Second mold Plate, 43 Locking plate, 44 Forming groove, 45 Forming hole, 46 Positioning hole, 47 Locking groove, 48 Opening and closing reference ring, 5 Drive mechanism, 51 Mounting bracket, 52 First oil cylinder, 53 Linkage assembly, 6 Pressing assembly, 61 Fixing bracket, 62 Fourth oil cylinder, 63 Vertical sliding plate, 64 Fifth oil cylinder, 65 Pressure sleeve, 7 Helical blade structure, 70 Clearance notch, 71 Blade, 72 Adjusting shim, 8 Drive assembly, 81 Second oil cylinder, 82 Connecting sleeve, 83 Drive rod, 84 Rack, 85 First guide rod, 9 Induction switch. Detailed Implementation

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, a metal corrugated pipe forming machine includes a frame 1, a lower forming die 2, an upper forming die 3, and a forming diaphragm 4. The frame is existing technology, and its specific structure is not described in detail in this embodiment. The lower forming die 2 is slidably connected to the frame 1. The upper forming die 3 includes a rotating shaft 31, a first rotating frame 32, a second rotating frame 33, and a locking mechanism 34. The rotating shaft 31 is mounted on the frame 1. The first rotating frame 32 and the second rotating frame 33 are both rotatably connected to the rotating shaft 31. The locking mechanism 34 is mounted on either the first rotating frame 32 or the second rotating frame 33. Each of the first rotating frame 32, the second rotating frame 33, and the locking mechanism 34 is provided with a positioning post 35 for mounting the forming diaphragm 4, and the forming diaphragm 4 can slide up and down along the positioning post 35. Specifically, as shown... Figure 8 and Figure 9As shown, the forming diaphragm 4 includes a first template 41, a second template 42, and an opening / closing reference ring 48. The first template 41 is hinged to the second template 42 via the opening / closing reference ring 48. The opening / closing reference ring 48 has a reference hole adapted to the rotating shaft 31. One end of the locking plate 43 is rotatably connected to the first template 41, and the other end of the locking plate 43 has a locking tongue. The second template 42 has a locking groove 47 that cooperates with the locking tongue. The locking mechanism 34 is connected to the locking plate 43. The first template 41, the second template 42, and the locking plate 43 all have positioning holes 46. The positioning pin 35 is disposed in the positioning hole 46, which can... Effectively reducing the gap between the positioning pin and the positioning hole enables rapid installation of the molded diaphragm and ensures the coaxiality of the molded diaphragm. An annular molding groove 44 and a circular molding hole 45 are provided between the first template 41 and the second template 42. The frame 1 is provided with a drive mechanism 5 that drives the first rotating frame 32 and the second rotating frame 33 to rotate simultaneously. The frame 1 is provided with a pressing assembly 6. The first rotating frame 32 and the second rotating frame 33 are rotatably connected with a spiral blade structure 7 that pushes the molded diaphragm 4 to lift. The spiral blade structure 7 is provided with a clearance notch 70 for the molded diaphragm 4 to slide during the second expansion pressing.

[0030] The upper forming mold is configured with a rotating shaft, a first rotating frame, a second rotating frame, and a locking mechanism. The forming diaphragm is mounted on the first rotating frame, the second rotating frame, and the locking mechanism via positioning pins. Since the first and second rotating frames are mounted on the rotating shaft, the forming diaphragm can open and close with the opening and closing movements of the first and second rotating frames. The spiral blades rotating on the first and second rotating frames lift the forming diaphragm, thus achieving automatic arrangement of the forming diaphragms and greatly simplifying the installation process. Furthermore, the locking mechanism effectively locks the forming diaphragm, preventing separation during the pressing process and significantly improving the forming quality. In addition, the positioning pins not only achieve the desired shape but also... The machine allows for rapid installation of the molded diaphragm while ensuring its coaxiality. Secondly, during the second expansion operation, the spiral blade structure has an avoidance notch, allowing it to simply rotate and retract, preventing spatial interference with the downward pressing action of the molded diaphragm and improving overall work efficiency. Furthermore, the drive mechanism enables synchronous rotation of the first and second rotating frames, ensuring the stability of the molded diaphragm's opening and closing. Finally, the lower mold and frame are slidably connected, and the upper mold's openable structure prevents spatial interference with the lower mold, significantly improving sample loading and unloading efficiency, and further enhancing operator efficiency.

[0031] The drive mechanism 5 includes a mounting frame 51 and a first hydraulic cylinder 52. The mounting frame 51 is fixedly connected to the frame 1, and the first hydraulic cylinder 52 is fixedly connected to the mounting frame 51. The piston rod of the first hydraulic cylinder 52 is provided with a connecting rod assembly 53 that drives the first rotating frame 32 and the second rotating frame 33 to rotate synchronously. The connecting rod assembly 53 is prior art and will not be described in detail in this embodiment. The drive mechanism 5 is configured with a structure of mounting frame 51 and first hydraulic cylinder 52. The mounting frame 51 enables the first hydraulic cylinder 52 to be stably mounted on the frame 1. Since the first oil cylinder 52 is equipped with a connecting rod assembly 53, during operation, only the movement of the first oil cylinder 52 needs to be controlled to control the movement of the connecting rod assembly 53. The overall structure is simple. Specifically, the extension of the first oil cylinder 52 drives the piston rod to extend and push the connecting rod assembly 53 to move, thereby realizing the mold closing action of the upper forming mold 3. The retraction of the first oil cylinder 52 drives the piston rod to retract and drives the connecting rod assembly 53 to move, thereby realizing the mold opening action of the upper forming mold 3. In this embodiment, the mounting bracket 51 is fixedly mounted on the frame 1 with bolts, which facilitates the overall installation and disassembly.

[0032] The first rotating frame 32 and the second rotating frame 33 are each provided with a rotating shaft 36 for mounting a helical blade structure 7, and the mounting frame 51 is provided with a driving assembly 8 for driving the two rotating shafts 36 to rotate simultaneously. The drive assembly 8 includes a second hydraulic cylinder 81, a connecting sleeve 82, and a drive rod 83. In this embodiment, the drive rod consists of two independent structures for easy installation. The second hydraulic cylinder is fixedly connected to the mounting bracket 51. One end of the drive rod is mounted on the connecting sleeve, and the other end of the drive rod is provided with a rack 84. The rotating shaft 36 is provided with a gear 37 that meshes with the rack 84. The drive assembly is configured as a structure of a second hydraulic cylinder, a connecting sleeve, and a drive rod. The extension and retraction of the second hydraulic cylinder drives the connecting sleeve to move, which in turn drives the drive rod to move. Since the drive rod is provided with a rack and the rotating shaft is provided with a gear 37, the rotating shaft 36 can achieve forward and reverse rotation under the action of the gear 37. Specifically, when the piston rod of the second hydraulic cylinder extends, the drive rod drives the gear 37 to rotate counterclockwise, thereby causing the spiral blade structure 7 to lift the forming diaphragm 4. When the piston rod of the second hydraulic cylinder retracts, the drive rod drives the gear 37 to rotate clockwise, causing the spiral blade structure 7 to rotate to the clearance notch 70. The overall structure is compact. In addition, the drive rod 83 is provided with a first guide rod 85, and the first rotating frame 32 or / and the second rotating frame 33 are provided with a guide through hole 38 that cooperates with the first guide rod. The setting of the first guide rod and the guide through hole 38 can improve the straightness of the drive rod movement. In this embodiment, the first guide rod is set on one of the drive rods, and the first guide rod and the drive rod are an integral structure, which simplifies the installation process between the first guide rod and the drive rod and improves the connection strength between the first guide rod and the drive rod.

[0033] The spiral blade structure 7 includes at least two blades 71, each blade 71 having a clearance notch 70. The rotating shaft 36 is provided with an adjusting shim 72 and / or an adjusting nut. The adjusting shim 72 and / or the adjusting nut are disposed between two adjacent blades 71. In this embodiment, the adjusting shim 72 is used, which can effectively adjust the spacing between the formed films 4. In use, it can be adjusted by installing adjusting shims 72 of different thicknesses or different numbers of adjusting shims 72. The adjustment effect is good, and the installation and disassembly are convenient. Setting the spiral blade structure 7 to have at least two blades 71 simplifies the overall structure of the entire spiral blade structure 7 and makes installation and disassembly convenient.

[0034] The locking mechanism 34 includes a base 341, a third hydraulic cylinder 342, and a push rod 343. The base 341 is fixedly connected to the first rotating frame 32. The third hydraulic cylinder 342 is fixedly connected to the base 341. The push rod 343 is fixedly connected to the piston rod of the third hydraulic cylinder 342. The push rod 343 is provided with a bracket 344 for fixing the positioning pin 35. The push rod 343 is provided with a second guide rod 345. The base 341 is provided with a guide sleeve 346 that cooperates with the second guide rod 345. The locking mechanism 34 is configured as a base 341, a third hydraulic cylinder 342, and a push rod 343. The third hydraulic cylinder 342 is fixed on the first rotating frame 32 through the base 341, ensuring that the locking mechanism 34 can rotate synchronously with the first rotating frame 32. The extension and retraction of the third hydraulic cylinder 342 controls the movement of the push rod 343, thereby driving the positioning column 35 to move, which in turn drives the locking plate 43 to rotate. The whole structure is simple and easy to install. The setting of the guide sleeve 346 and the second guide rod 345 can ensure the straightness of the movement of the push rod 343.

[0035] The pressing assembly 6 includes a fixed frame 61, a fourth hydraulic cylinder 62, and a vertical slide plate 63. The fixed frame 61 is fixedly connected to the frame 1, and the vertical slide plate 63 is movably connected to the fixed frame 61. The fourth hydraulic cylinder 62 is mounted on the vertical slide plate 63. The fixed frame 61 is equipped with a fifth hydraulic cylinder 64 connected to the vertical slide plate 63. The piston rod of the fourth hydraulic cylinder 62 is equipped with a pressure sleeve 65. The pressing assembly 6 is configured with a structure of a fixed frame 61, a fourth hydraulic cylinder 62, and a vertical slide plate 63. Since the fixed frame 61 is equipped with a fifth hydraulic cylinder 64 connected to the vertical slide plate 63, during the pressing operation, the fourth hydraulic cylinder 62 is responsible for the pressing action of the first expansion operation, and the fifth hydraulic cylinder 64 is responsible for the pressing action of the second expansion operation. This allows for precise position control and provides a certain degree of protection for the entire upper forming mold 3, improving the overall service life. The pressure sleeve 65 increases the contact area between the pressing assembly 6 and the forming diaphragm 4, thereby improving the pressing quality.

[0036] Last look Figure 7The lower forming mold 2 includes a slider 21 and a fixed post 22 disposed on the slider 21. The fixed post 22 is provided with a fixed cavity 23. The frame 1 is provided with a sliding groove 11. The slider 21 is slidably connected to the sliding groove 11. The lower forming mold 2 is configured with a slider 21 and a fixed post 22. Since the frame 1 is provided with a sliding groove 11, it can be ensured that the slider 21 can slide smoothly on the frame 1, which facilitates the loading and unloading of the sample. The fixed cavity 23 can play a certain role in fixing the sample. In this embodiment, the fixed post 22 and the slider 21 can adopt a threaded connection structure, which is convenient for installation and disassembly and has a reliable connection. In addition, the slide groove 11 is provided with a guide boss 12, and the slider 21 is provided with a guide groove 24 that cooperates with the guide boss 12. Through the guiding cooperation of the guide boss 12 and the wire groove, the straightness of the slider 21 sliding on the frame 1 can be guaranteed. The guide boss 12 and / or the guide groove 24 are provided with an inductive switch 9. The frame 1 is provided with a controller 13 connected to the inductive switch 9. The controller 13 is connected to the drive mechanism 5. When the inductive switch 9 is set, the sample is placed on the fixed cavity 23 and then the slider 21 is pushed. When the inductive switch 9 detects the slider 21, the inductive switch 9 sends a signal to the controller 13. After receiving the signal, the controller 13 controls the drive mechanism 5 to act. The specific connection structure is existing technology and will not be described in detail in this embodiment. It realizes automated operation and improves work efficiency. Finally, in order to facilitate the operator to push the slider 21, a handle 25 can be set on the slider 21, which further improves the sample loading and unloading efficiency.

[0037] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the scope defined by the appended claims.

Claims

1. A metal corrugated pipe forming machine, comprising a frame, a lower forming die, an upper forming die, and a forming diaphragm, characterized in that: The lower forming die is slidably connected to the frame. The upper forming die includes a rotating shaft, a first rotating frame, a second rotating frame, and a locking mechanism. The rotating shaft is mounted on the frame. The first and second rotating frames are rotatably connected to the rotating shaft. The locking mechanism is mounted on either the first or second rotating frame. Each of the first, second, and locking frames has a positioning post for mounting the forming film, and the forming film can slide up and down along the positioning post. The frame has a driving mechanism for driving the first and second rotating frames to rotate simultaneously. The frame has a pressing assembly. Each of the first and second rotating frames has a spiral blade structure rotatably connected to push the forming film up. The spiral blade structure has a clearance notch for the forming film to slide during the second expansion pressing.

2. The metal corrugated pipe forming machine according to claim 1, characterized in that: The drive mechanism includes a mounting bracket and a first hydraulic cylinder. The mounting bracket is fixedly connected to the frame, and the first hydraulic cylinder is fixedly connected to the mounting bracket. The piston rod of the first hydraulic cylinder is provided with a connecting rod assembly that drives the first rotating frame and the second rotating frame to rotate synchronously.

3. The metal corrugated pipe forming machine according to claim 2, characterized in that: The first and second rotating frames are each equipped with a rotating shaft with a helical blade structure, and the mounting frame is equipped with a drive assembly that drives the two rotating shafts to rotate simultaneously.

4. A metal corrugated pipe forming machine according to claim 3, characterized in that: The drive assembly includes a second hydraulic cylinder, a connecting sleeve, and a drive rod. The second hydraulic cylinder is fixedly connected to the mounting bracket. One end of the drive rod is mounted on the connecting sleeve, and the other end of the drive rod is provided with a rack. The rotating shaft is provided with a gear that meshes with the rack for transmission.

5. A metal corrugated pipe forming machine according to claim 4, characterized in that: The drive rod is provided with a first guide rod, and the first rotating frame or / and the second rotating frame are provided with guide through holes that cooperate with the first guide rod.

6. A metal corrugated pipe forming machine according to claim 3, characterized in that: The spiral blade structure includes at least two blades, each blade having the clearance notch, and the rotating shaft having an adjusting shim and / or an adjusting nut, the adjusting shim and / or the adjusting nut being disposed between two adjacent blades.

7. A metal corrugated pipe forming machine according to claim 1, characterized in that: The locking mechanism includes a base, a third hydraulic cylinder, and a push rod. The base is fixedly connected to the first rotating frame, the third hydraulic cylinder is fixedly connected to the base, and the push rod is fixedly connected to the piston rod of the third hydraulic cylinder. The push rod is provided with a bracket for fixing the positioning column and a second guide rod. The base is provided with a guide sleeve that cooperates with the second guide rod.

8. A metal corrugated pipe forming machine according to claim 1, characterized in that: The pressing assembly includes a fixed frame, a fourth hydraulic cylinder, and a vertical sliding plate. The fixed frame is fixedly connected to the frame, the vertical sliding plate is movably connected to the fixed frame, the fourth hydraulic cylinder is mounted on the vertical sliding plate, the fixed frame is provided with a fifth hydraulic cylinder connected to the vertical sliding plate, and the piston rod of the fourth hydraulic cylinder is provided with a pressure sleeve.

9. A metal corrugated pipe forming machine according to claim 1, characterized in that: The forming lower mold includes a slider and a fixed post disposed on the slider. The fixed post is provided with a fixed cavity. The frame is provided with a sliding groove. The slider is slidably connected to the sliding groove.

10. A metal corrugated pipe forming machine according to claim 9, characterized in that: The slide is provided with a guide boss, the slider is provided with a guide groove that cooperates with the guide boss, and the guide boss and / or the guide groove are provided with an inductive switch. The frame is provided with a controller connected to the inductive switch, and the controller is connected to the drive mechanism.

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