A water expansion device for stainless steel pipes

Abstract

The present application relates to a water expansion device for stainless steel pipes, comprising a machine platform, both ends of which are provided with water-passing components, the water-passing components comprising a mounting seat sliding on the machine platform, a water injection wheel rotatably connected to the mounting seat, a plurality of water injection ports for adapting to pipe ports of different shapes being evenly spaced on the outer wall of the water injection wheel, a water guide component connected to the water injection port being provided on the side wall of the mounting seat, a first driving component for driving two water injection wheels to rotate synchronously being provided on the machine platform, and a second driving component for driving two mounting seats to slide synchronously being further provided on the side wall of the machine platform. Through the above scheme, water expansion forming of pipe fittings with various port shapes can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of stainless steel pipe processing, and in particular to a water expansion device for stainless steel pipes. Background Art

[0002] The water expansion forming machine uses the incompressibility of water to form metal products in a mold through high-pressure water. It is used in the manufacturing field of metal daily necessities. In existing CNC water expansion forming machines, the lower mold is usually fixedly installed on the lower mold base, and the upper mold is installed on the upper mold base. The upper mold base is connected to the main pressure cylinder and can move up and down through the main pressure cylinder to achieve mold closing and mold opening.

[0003] Existing stainless steel pipe manufacturers use water expansion forming machines to press steel pipes into irregular shapes when manufacturing stainless steel pipes. Existing water expansion forming machines can usually only process stainless steel pipes with circular diameters. For processing some non-circular diameter steel pipes, it is necessary to dismantle the existing water injection joints and replace them with water injection joints with the same cross-sectional shape as the pipe mouth. Since there are many types of pipe fittings processed in the factory, a single water expansion forming machine needs to repeatedly dismantle and replace the water injection joints when processing stainless steel pipes with various pipe mouth shapes. This processing method greatly consumes manpower and material resources and seriously slows down the processing efficiency. Summary of the invention

[0004] In order to reduce the consumption of manpower, material resources and time during the disassembly and assembly process and improve processing efficiency, the present application provides a water expansion device for stainless steel pipes.

[0005] The present application provides a water expansion device for stainless steel pipes, which adopts the following technical solution:

[0006] A water expansion device for stainless steel pipes, comprising a machine platform, with water-passing components arranged at both ends of the machine platform, the water-passing components comprising a mounting seat sliding on the machine platform, a water injection wheel rotatably connected to the mounting seat, a plurality of water injection ports for adapting to pipe ports of different shapes being evenly spaced on the outer wall of the water injection wheel, a water guide component connected to the water injection port being arranged on the side wall of the mounting seat, a first drive component for driving two water injection wheels to rotate synchronously being arranged on the machine platform, and a second drive component for driving two mounting seats to slide synchronously being also arranged on the side wall of the machine platform.

[0007] By adopting the above technical solution, the steel pipe to be formed is placed between two mounting seats. At this time, the steel pipe is located in the lower mold cavity of the machine. Through the first driving component, the water injection port corresponding to the cross-sectional shape of the steel pipe port is facing the port of the steel pipe. Through the second driving component, the port of the steel pipe is connected to the corresponding water injection port. Under the action of the water guide component, water is passed into the steel pipe. During the actual processing, the upper mold of the machine body is pressed vertically downward, and the upper mold and the lower mold are closed, thereby realizing water expansion forming.

[0008] Optionally, the water guide assembly includes a water collecting shell fixed on the upper surface of the mounting seat, a guide pipe fixed on one side of the water injection wheel, and a sealing ring fixed on the inner side of the guide pipe. One end of the water collecting shell is connected to the external water channel through a water pipe. The water collecting shell is provided with a first hole facing the water injection wheel. The outer side of the water injection wheel is provided with a second hole connected to the corresponding water injection port. Several second holes are distributed in a circle. The first hole is used in conjunction with the second hole. The inner wall of the water collecting shell is provided with a groove for embedding the sealing ring. The guide pipe is coaxially rotatably connected to the outer side of the water collecting shell.

[0009] By adopting the above technical solution, the external water pump is controlled by the PLC device to supply water to the water collecting shell. The water flows into the second hole through the first hole and finally flows into the corresponding water injection port, thereby realizing water supply to the steel pipe during the water expansion forming process.

[0010] Optionally, a sealing ring is fixed to the outer wall of the water collecting shell, an annular groove is opened on the inner wall of the flow guide pipe, the sealing ring is embedded in the annular groove, and the annular groove is also filled with sealing oil.

[0011] By adopting the above technical solution, the sealing ring enhances the sealing between the water collecting shell and the flow guide pipe, making it difficult for the water in the water collecting shell to leak.

[0012] Optionally, a pressure sensor for detecting the water pressure in the inner cavity of the water collecting shell is provided on the side wall of the water collecting shell, and the pressure sensor is electrically connected to an external PLC control device, which can control the flow rate and water pressure of water supplied by external pumping equipment to the water collecting shell.

[0013] By adopting the above technical solution, the flow rate and pressure of the water flow are reasonably controlled, making it difficult for water pipe burst accidents to occur during the water expansion forming process, thereby ensuring the safety of the water expansion forming.

[0014] Optionally, a plurality of thread grooves are provided on the side wall of the water injection wheel, the number of the thread grooves is equal to the number of the water injection ports, and the thread grooves and the water injection ports are arranged in a one-to-one correspondence, and the diameter of the water injection ports is smaller than the diameter of the thread grooves.

[0015] By adopting the above technical solution, when water expansion forming is performed on pipe fittings with bent steel pipe ends, the pipe is connected by threading so that one end of the pipe is threadedly connected in the thread groove, the inner cavity of the pipe and the water injection port are interconnected, and the other end of the pipe is butt-connected to the end of the steel pipe, thereby realizing water expansion forming of the steel pipe with bent ends.

[0016] Optionally, the first driving assembly includes a first bevel gear coaxially fixed on the rotating shaft of the water injection wheel, a bracket slidably arranged on the machine platform, a telescopic square tube rotatably connected to the bracket, a second bevel gear fixed at both ends of the telescopic square tube, a worm wheel fixed on the outside of one end of the telescopic square tube, a worm rotatably connected to the bracket, and a first motor fixed on the bracket, the first bevel gear is meshed with the corresponding second bevel gear, the worm is meshed with the worm wheel, and the rotating shaft of the first motor is coaxially fixedly connected to the worm.

[0017] By adopting the above technical solution, the shaft of the first motor is driven to rotate. The first motor is a servo motor, and the first motor is electrically connected to an external PLC device. The shaft of the first motor is driven to rotate at a fixed angle through the PLC controller. The worm engages with the worm wheel to make the entire telescopic square tube rotate synchronously, and the first bevel gear engages with the second bevel gear to rotate, thereby realizing the adjustment of the rotation angle of the entire water injection wheel.

[0018] Optionally, a linear slide rail is fixed on the side wall of the machine, the bracket slides on the linear slide rail, the telescopic square tube includes a first tube and a second tube sliding in the inner cavity of the first tube, the cross-sections of the first tube and the second tube are both rectangular, the first tube is rotatably connected to the bracket, a first connecting rod is arranged between one of the mounting seats and the first tube, the first connecting rod is rotatably connected to the first tube, and a second connecting rod is arranged between the other mounting seat and the second tube, the second connecting rod is rotatably connected to the second tube.

[0019] By adopting the above technical solution, the telescopic tube can be synchronously extended and retracted during the sliding of the mounting seat, so that even if the mounting seat slides, the meshing transmission of the first bevel gear and the second bevel gear can be guaranteed.

[0020] Optionally, the second driving assembly includes a bidirectional screw rotatably connected to the machine platform and a second motor fixed to the side wall of the machine platform, the rotating shaft of the second motor is coaxially fixedly connected to the rotating shaft of the bidirectional screw, and the two mounting seats are respectively threadedly connected to the two ends of the bidirectional screw.

[0021] By adopting the above technical solution, when the second motor is driven to rotate, the two mounting seats are caused to slide toward each other synchronously, so that the water injection port corresponding to the steel pipe mouth is connected to the end of the steel pipe, and water leakage is unlikely to occur during the water expansion forming process.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] By setting up a water injection wheel, the water expansion equipment can realize water expansion forming of pipe fittings with various port shapes, which improves the application scope of the water expansion equipment. The entire processing process does not require repeated disassembly and assembly of tooling fixtures, reducing the consumption of manpower, material resources and time during the disassembly and assembly process, and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of this embodiment.

[0025] Figure 2 It is a cross-sectional view of the water injection wheel in this embodiment.

[0026] Figure 3 It is a machine platform of this embodiment, which is mainly used to show the overall structural diagram of the first driving component.

[0027] Figure 4 It is a machine platform of this embodiment, which is mainly used to show the overall structural diagram of the second driving component.

[0028] Figure numerals: 1, machine; 2, water-passing assembly; 3, mounting seat; 4, water-filling wheel; 5, water-filling port; 6, water-guiding assembly; 7, first drive assembly; 8, second drive assembly; 9, water-collecting shell; 10, guide pipe; 11, sealing ring; 12, first hole; 13, second hole; 14, sealing ring; 15, pressure sensor; 16, threaded groove; 17, first bevel gear; 18, bracket; 19, telescopic square tube; 20, second bevel gear; 21, worm gear; 22, worm; 23, first motor; 24, linear slide rail; 25, first tube; 26, second tube; 27, first connecting rod; 28, second connecting rod; 29, bidirectional screw; 30, second motor. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-4 This application is described in further detail.

[0030] The embodiment of the present application discloses a water expansion device for a stainless steel pipe.

[0031] Reference Figure 1 A water expansion device for a stainless steel pipe comprises a machine platform 1, water-passing components 2 are arranged at both ends of the machine platform 1, an upper die and a lower die are arranged at the middle position of the machine platform 1, the upper die is connected to the piston rod of the main hydraulic cylinder, the lower die is fixed on the upper surface of the machine platform 1, and cavities are opened on the side walls opposite to the upper die. In the actual processing process, the stainless steel pipe is placed in the cavity of the lower die, and then water is introduced into the inner cavity of the steel pipe through the water-passing components 2 at both ends of the stainless steel pipe, so that when the lower die is closed with the upper die, the steel pipe is pressed into the same shape as the cavity of the lower die. In the whole process, since the water circulates in the steel pipe, it is difficult for the steel pipe to be compressed.

[0032] Reference Figure 1 and Figure 2The water-passing component 2 includes a mounting seat 3 and a water injection wheel 4. The mounting seat 3 is slidably arranged on the machine 1. The water injection wheel 4 is rotatably connected to the mounting seat 3. A plurality of water injection ports 5 are evenly spaced on the arc side wall of the water injection wheel 4. The cross-sectional shape of each water injection port 5 is different. Different water injection ports 5 can be adapted to steel pipes with ports of different cross-sectional shapes.

[0033] Reference Figure 2 In order to facilitate the flow of water in the inner cavity of the steel pipe, a water guide assembly 6 is also provided on the side wall of the mounting seat 3. The water guide assembly 6 includes a water collecting shell 9, a guide pipe 10 and a sealing ring 11. The water collecting shell 9 is cylindrical, and the axial direction of the water collecting shell 9 is parallel to the axial direction of the water injection wheel 4, and the axial direction of the water collecting shell 9 is perpendicular to the sliding direction of the mounting seat 3. The water collecting shell 9 is fixed on the upper surface of the mounting seat 3, the guide pipe 10 is coaxially fixed on the side wall of the water injection wheel 4, the sealing ring 11 is coaxially fixed on the inner side of the guide pipe 10, and the end of the guide pipe 10 away from the water injection wheel 4 is coaxially rotatably connected to the outer side of the water collecting shell 9. Specifically, a mounting groove can be opened on the inner wall of the guide pipe 10, and a fixed ball bearing is embedded in the mounting groove. The outer wall of the water collecting shell 9 is fixedly connected to the inner ring wall of the ball bearing, and the mounting groove is filled with gelatinous sealing oil.

[0034] Reference Figure 2 , at the end of the water collecting shell 9 away from the water injection wheel 4, a conduit is used to connect the inner cavity of the water collecting shell 9 with the inner cavity of the external water pipeline. Specifically, a high-pressure water pump can be set to pump water into the water collecting shell 9. The high-pressure water pump is electrically connected to an external PLC device. The speed of the high-pressure water pump can be controlled by the external PLC device, thereby controlling the flow rate and pressure of the pumped water. A first hole 12 is provided on the side wall of the end of the water collecting shell 9 extending into the guide tube 10, and a plurality of second holes 13 are evenly spaced on the side wall of the water injection wheel 4. The number of the second holes 13 is equal to the number of the water injection ports 5, and the second holes 13 are arranged one-to-one with the water injection ports 5. The second holes 13 are connected to the water injection ports 5, and the plurality of second holes 13 are located in the inner cavity of the guide tube 10.

[0035] Reference Figure 2 When the water injection wheel 4 is driven to rotate, the first hole 12 and the corresponding second hole 13 are connected to each other, so that the water drawn into the water collecting shell 9 enters the corresponding water injection port 5 through the second hole 13, and finally flows through the inner cavity of the steel pipe to achieve the water flow effect.

[0036] Reference Figure 2In order to further ensure the sealing between the water collecting shell 9 and the guide tube 10, a sealing ring 14 is fixed on the outer wall of the water collecting shell 9. The sealing ring 14 is made of silicone. An annular groove is provided on the inner wall of the guide tube 10. The sealing ring 14 is embedded in the annular groove, and the annular groove is filled with sealing oil to further ensure the sealing. The sealing ring 11 and the sealing ring 14 are both arranged on the side of the ball bearing away from the water injection wheel 4.

[0037] Reference Figure 2 In order to ensure the safety of the water expansion forming process, a pressure sensor 15 is also provided on the side wall of the water collecting shell 9. A safe water pressure value is preset on the pressure sensor 15 in advance, and the pressure sensor 15 is electrically connected to the PLC device. When the preset value is exceeded, the PLC device will control the external water pump to slowly pump water into the water collecting shell 9, reduce the water flow, thereby reducing the water pressure and preventing bursting.

[0038] Reference Figure 2 At the same time, in order to facilitate the connection of the steel pipe with a curved end, thread grooves 16 are evenly spaced on the outside of the water injection wheel 4. The thread grooves 16 are arranged one by one with the water injection port 5. The diameter of the thread groove 16 is larger than the diameter of the water injection port 5, and the water outlet end of the water injection port 5 is located in the thread groove 16. The thread groove 16 is an annular groove. In the initial state, the thread groove 16 is not connected to the water injection port 5.

[0039] Reference Figure 1 and Figure 3 The machine 1 is also provided with a first driving assembly 7 for driving the two water injection wheels 4 to rotate synchronously at a fixed angle, and a second driving assembly 8 for driving the two mounting seats 3 to slide synchronously toward or away from each other. The first driving assembly 7 includes a first bevel gear 17, a bracket 18, and a telescopic square tube 19. The telescopic square tube 19 includes a first tube 25 and a second tube 26. The cross-sections of the first tube 25 and the second tube 26 are both square, and one end of the second tube 26 slides in the inner cavity of the first tube 25. A linear slide rail 24 is fixed on the side wall of the machine 1. The bracket 18 slides on the linear slide rail 24. The first tube 25 is rotatably connected to the bracket 18. The rotation axis of the first tube 25 is arranged parallel to the length direction of the machine 1.

[0040] Reference Figure 3 The first bevel gear 17 is coaxially fixed on the rotating shaft of the water injection wheel 4. In order to ensure the synchronous rotation of the two water injection wheels 4, a second bevel gear 20 is fixed to the end of the first tube 25 away from the second tube 26, and another second bevel gear 20 is fixed to the end of the second tube 26 away from the first tube 25. The second bevel gear 20 is meshed with the corresponding first bevel gear 17. Thus, the first tube 25 is driven to rotate, and the two water injection wheels 4 can be rotated synchronously.

[0041] Reference Figure 1 and Figure 3The first driving assembly 7 also includes a worm wheel 21, a worm 22 and a first motor 23. The worm wheel 21 is fixed on the outside of the first tube 25. The worm 22 is rotatably connected to the bracket 18. The worm 22 is meshed with the worm wheel 21. The first motor 23 is fixed on the bracket 18. The rotating shaft of the first motor 23 is coaxially fixedly connected with the worm 22. The first motor 23 is a servo motor. The first motor 23 is electrically connected to an external PLC device.

[0042] Reference Figure 3 and Figure 4 In order to make the first tube 25 and the second tube 26 expand and contract synchronously when the mounting seat 3 moves, a first connecting rod 27 is provided between the first tube 25 and the adjacent mounting seat 3, one end of the first connecting rod 27 is fixed to the side wall of the mounting seat 3, and the other end is rotatably connected to the outside of the first tube 25 through a ball bearing. A second connecting rod 28 is provided between the second tube 26 and the adjacent mounting seat 3, the second connecting rod 28 is fixedly connected to the adjacent mounting seat 3, and one end of the second connecting rod 28 away from the mounting seat 3 is rotatably connected to the outside of the second tube 26 through a ball bearing.

[0043] Reference Figure 3 and Figure 4 The second driving assembly 8 includes a bidirectional lead screw 29 and a second motor 30. The bidirectional lead screw 29 is rotatably connected to the side wall of the machine table 1, and the second motor 30 is fixed to the side wall of the machine table 1. The bidirectional lead screw 29 is located below the lower mold. It is optimal to open a mounting groove on the upper surface of the machine table 1 so that the bidirectional lead screw 29 is rotatably connected in the mounting groove. The thread rotation directions at both ends of the bidirectional lead screw 29 are oppositely arranged. The two mounting seats 3 are respectively threadedly connected to the two ends of the bidirectional lead screw 29. The rotating shaft of the second motor 30 is coaxially fixedly connected to the rotating shaft of the bidirectional lead screw 29. The second motor 30 is a servo motor, and the second motor 30 is electrically connected to an external PLC device.

[0044] The implementation principle of a water expansion device for a stainless steel pipe in an embodiment of the present application is as follows: the steel pipe to be processed is placed in the mold cavity of the lower mold in advance, so that the two ends of the steel pipe are respectively facing the corresponding mounting seats 3, and the first motor 23 is used to rotate the water injection wheel 4 to realize that the water injection port 5 with the same cross-sectional shape as the steel pipe port is positively aligned with the port of the steel pipe. At this time, the second motor 30 is used to drive the bidirectional screw 29 to rotate, so that the ports of the steel pipe are respectively inserted into the corresponding water injection ports 5, one of the water injection wheels 4 is used for water inlet, and the other water injection wheel 4 is used for water outlet, thereby realizing the flow of water in the steel pipe, driving the upper mold and the lower mold to close the mold, and realizing the water expansion forming processing of the steel pipe.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A water expansion device for stainless steel pipes, comprising a machine (1), characterized in that: Both ends of the machine (1) are provided with water-passing components (2), the water-passing components (2) comprising a mounting seat (3) sliding on the machine (1), a water injection wheel (4) rotatably connected to the mounting seat (3), a plurality of water injection ports (5) for adapting to pipe ports of different shapes being evenly spaced on the outer wall of the water injection wheel (4), a water guide component (6) communicating with the water injection ports (5) being provided on the side wall of the mounting seat (3), a first driving component (7) for driving the two water injection wheels (4) to rotate synchronously being provided on the machine (1), and a second driving component (8) for driving the two mounting seats (3) to slide synchronously being provided on the side wall of the machine (1); The water guide assembly (6) comprises a water collecting shell (9) fixed on the upper surface of the mounting seat (3), a flow guide pipe (10) fixed on one side of the water injection wheel (4), and a sealing ring (11) fixed on the inner side of the flow guide pipe (10); one end of the water collecting shell (9) is connected to an external water channel through a water pipe; a first hole (12) is provided on the side of the water collecting shell (9) facing the water injection wheel (4); a second hole (13) connected to a corresponding water injection port (5) is provided on the outer side of the water injection wheel (4); a plurality of second holes (13) are distributed in a circular shape; the first hole (12) and the second hole (13) are used in conjunction with each other; an embedding groove for embedding the sealing ring (11) is provided on the inner wall of the water collecting shell (9); and the flow guide pipe (10) is coaxially rotatably connected to the outer side of the water collecting shell (9).

2. A water expansion device for a stainless steel pipe according to claim 1, characterized in that: A sealing ring (14) is fixed on the outer wall of the water collecting shell (9), an annular groove is provided on the inner wall of the flow guide tube (10), the sealing ring (14) is embedded in the annular groove, and the annular groove is also filled with sealing oil.

3. The water expansion device for stainless steel pipe according to claim 1, characterized in that: A pressure sensor (15) for detecting the water pressure in the inner cavity of the water collection shell (9) is arranged on the side wall of the water collection shell (9); the pressure sensor (15) is electrically connected to an external PLC control device, and the PLC device can control the flow rate and water pressure of water supplied to the water collection shell (9) by external pumping equipment.

4. The water expansion device for stainless steel pipe according to claim 1, characterized in that: A plurality of thread grooves (16) are also provided on the side wall of the water injection wheel (4), the number of the thread grooves (16) being equal to the number of the water injection ports (5), and the thread grooves (16) and the water injection ports (5) being arranged in a one-to-one correspondence, and the diameter of the water injection ports (5) being smaller than the diameter of the thread grooves (16).

5. The water expansion device for stainless steel pipe according to claim 1, characterized in that: The first driving assembly (7) comprises a first bevel gear (17) coaxially fixed on the rotating shaft of the water injection wheel (4), a bracket (18) slidably arranged on the machine platform (1), a telescopic square tube (19) rotatably connected to the bracket (18), a second bevel gear (20) fixed at both ends of the telescopic square tube (19), a worm wheel (21) fixed on the outer side of one end of the telescopic square tube (19), a worm (22) rotatably connected to the bracket (18), and a first motor (23) fixed on the bracket (18); the first bevel gear (17) is meshed with the corresponding second bevel gear (20), the worm (22) is meshed with the worm wheel (21), and the rotating shaft of the first motor (23) is coaxially and fixedly connected to the worm (22).

6. A water expansion device for a stainless steel pipe according to claim 5, characterized in that: A linear slide rail (24) is fixed on the side wall of the machine platform (1), and the bracket (18) slides on the linear slide rail (24). The telescopic square tube (19) comprises a first tube (25) and a second tube (26) sliding in the inner cavity of the first tube (25). The cross sections of the first tube (25) and the second tube (26) are both rectangular. The first tube (25) is rotatably connected to the bracket (18). A first connecting rod (27) is arranged between one of the mounting seats (3) and the first tube (25), and the first connecting rod (27) is rotatably connected to the first tube (25). A second connecting rod (28) is arranged between the other mounting seat (3) and the second tube (26), and the second connecting rod (28) is rotatably connected to the second tube (26).

7. The water expansion device for stainless steel pipe according to claim 1, characterized in that: The second driving assembly (8) comprises a bidirectional lead screw (29) rotatably connected to the machine platform (1), and a second motor (30) fixed to the side wall of the machine platform (1); the rotating shaft of the second motor (30) is coaxially fixedly connected to the rotating shaft of the bidirectional lead screw (29); and the two mounting seats (3) are respectively threadedly connected to the two ends of the bidirectional lead screw (29).

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