A double-sided flanging forming device for a hollow tube with an inner lining

Abstract

This patent discloses a double-sided flanging forming device for a lined hollow pipe, which includes a frame, a panel, linear guides, a moving workbench, a conical surface forming unit, and an end surface forming unit; the conical surface forming unit includes a first upper telescopic driving mechanism, an upper conical heating film, a first lower telescopic driving mechanism, and a lower conical heating film. The telescopic head of the first upper telescopic driving mechanism is connected to the upper conical heating film, and the telescopic head of the first lower telescopic driving mechanism is connected to the lower conical heating film; the end surface forming unit includes a second upper telescopic driving mechanism, an upper forming die, a second lower telescopic driving mechanism, and a lower forming die. The telescopic head of the second upper telescopic driving mechanism is connected to the upper forming die, and the telescopic head of the second lower telescopic driving mechanism is connected to the lower forming die. The double-sided flanging forming device for the lined hollow pipe in this patent has high production efficiency, and at the same time, it can ensure that the two sides of the processed pipe are evenly stressed during bending, the end surface is flat, achieving the effects of consistent product dimensions and stable quality.

Description

Technical Field

[0001] This patent relates to the technical field of pipeline manufacturing, and specifically, it is a two-way flanging forming device for a lined hollow pipe. Background Art

[0002] Many pipelines and valves are lined with a tetrafluoro hollow pipe (i.e., a polytetrafluoroethylene hollow pipe) to achieve anti-corrosion and sealing effects. However, since the ends of the pipelines and valves have flange sealing end faces (i.e., pipeline flanges) for connection, it is necessary to also perform a 90-degree flanging treatment on the end faces of the lined tetrafluoro hollow pipes. However, in the existing processing technology, the 90-degree flanging of the lined tetrafluoro hollow pipe cannot be integrally formed by extrusion. Therefore, currently, it is generally completed manually by a forming tool after heating the tetrafluoro hollow pipe with an electric heater. This not only has low production efficiency, but also the flanging end faces are uneven due to uneven force, with poor dimensional consistency, and the quality is unstable. Summary of the Invention

[0003] The technical problem to be solved by this patent is to provide a two-way flanging forming device for a lined hollow pipe in view of the above-mentioned deficiencies of the existing technology. Compared with manual forming, this two-way flanging forming device for a lined hollow pipe greatly improves the production efficiency, ensures that the two sides of the processed pipeline are uniformly stressed during bending, the end faces are flat, and the product dimensions are consistent and the quality is stable.

[0004] To achieve the above technical objectives, the technical solution adopted by this patent is as follows:

[0005] A two-way flanging forming device for a lined hollow pipe, comprising a frame, a panel, linear guide rails, a moving workbench, a conical surface forming unit, and an end face forming unit;

[0006] The frame is fixedly connected with a panel, the panel is fixedly connected with linear guide rails, and the moving workbench is slidably connected to the linear guide rails through sliders;

[0007] The conical surface forming unit includes a first upper telescopic driving mechanism, an upper conical heating film, a first lower telescopic driving mechanism, and a lower conical heating film. The first upper telescopic driving mechanism is connected above the panel through a first upper connecting device, the telescopic head of the first upper telescopic driving mechanism is connected to the upper conical heating film, the first lower telescopic driving mechanism is connected below the panel through a first lower connecting device, and the telescopic head of the first lower telescopic driving mechanism is connected to the lower conical heating film;

[0008] The end face forming unit includes a second upper telescopic driving mechanism, an upper forming die, a second lower telescopic driving mechanism and a lower forming die. The second upper telescopic driving mechanism is connected above the panel through a second upper connecting device. The telescopic head of the second upper telescopic driving mechanism is connected to the upper forming die. The second lower telescopic driving mechanism is connected below the panel through a second lower connecting device. The telescopic head of the second lower telescopic driving mechanism is connected to the lower forming die;

[0009] The end face forming unit is located at the next working station of the conical surface forming unit. Notches for avoiding the movement of the lower conical heating film and the lower forming die are provided on both the panel and the moving workbench.

[0010] As a further improved technical solution of this patent, in the conical surface forming unit: the first upper telescopic driving mechanism uses a first upper electric cylinder, and the first lower telescopic driving mechanism uses a first lower electric cylinder; in the end face forming unit: the second upper telescopic driving mechanism uses a second upper electric cylinder, and the second lower telescopic driving mechanism uses a second lower electric cylinder.

[0011] As a further improved technical solution of this patent, in the conical surface forming unit:

[0012] The first upper connecting device includes a first fixing plate, a first guide post, a first slide plate connecting rod and a first slide plate. The bottom end of the first guide post is connected to the panel, and the top end is connected to the first fixing plate. The first upper electric cylinder is connected to the top of the first fixing plate. The electric cylinder telescopic screw head of the first upper electric cylinder passes through a reserved through hole in the middle of the first fixing plate and is connected to the top end of the first slide plate connecting rod. The bottom end of the first slide plate connecting rod is connected to the upper die head connecting sleeve. The upper die head connecting sleeve is connected to the middle of the first slide plate. The first slide plate is slidably connected to the first guide post. The upper die head connecting sleeve is connected to the upper conical heating film;

[0013] The first lower connecting device includes a first cover plate and a first cover plate connecting rod. The first cover plate is connected to the bottom end of the first cover plate connecting rod. The top end of the first cover plate connecting rod is connected to the panel. The first lower electric cylinder is connected to the bottom of the first cover plate. The electric cylinder telescopic screw head of the first lower electric cylinder passes through a reserved through hole in the middle of the first cover plate and is connected to the lower die head connecting sleeve. The lower die head connecting sleeve is connected to the lower conical heating film.

[0014] As a further improved technical solution of this patent, the bottom end of the first guide post is tightly connected to the panel by a nut, and the top end is tightly connected to the first fixed plate by a nut. The first upper electric cylinder is connected to the top of the first fixed plate by screws. The electric cylinder telescopic screw head of the first upper electric cylinder is threadedly connected to the top end of the first slide plate connecting rod. The bottom end of the first slide plate connecting rod is threadedly connected to the upper die head connecting sleeve. The upper die head connecting sleeve is connected to the middle of the first slide plate by screws. The first slide plate is slidably connected to the first guide post through a guide post sleeve. The upper die head connecting sleeve is connected to the upper cone heating film by screws;

[0015] The bottom end of the first cover plate is connected to the first cover plate connecting rod by screws, and the top end of the first cover plate connecting rod is threadedly connected to the panel. The first lower electric cylinder is connected to the bottom of the first cover plate by screws. The electric cylinder telescopic screw head of the first lower electric cylinder passes through a reserved through hole in the middle of the first cover plate and is threadedly connected to the lower die head connecting sleeve. The lower die head connecting sleeve is connected to the lower cone heating film by screws.

[0016] As a further improved technical solution of this patent, a heat insulation pad is provided between the upper die head connecting sleeve and the upper cone heating film. A heating rod is embedded inside the upper cone heating film. The connecting wire of the heating rod passes through a reserved hole in the heat insulation pad and a concave cavity between the upper die head connecting sleeve and the heat insulation pad and is electrically connected to an electric control operating platform;

[0017] A heat insulation pad is provided between the lower die head connecting sleeve and the lower cone heating film. A heating rod is embedded inside the lower cone heating film. The connecting wire of the heating rod passes through a reserved hole in the heat insulation pad and a concave cavity between the lower die head connecting sleeve and the heat insulation pad and is electrically connected to an electric control operating platform;

[0018] Both the first upper electric cylinder and the first lower electric cylinder are electrically connected to the electric control operating platform, and the electric control operating platform is electrically connected to a power supply.

[0019] As a further improved technical solution of this patent, in the end face forming unit:

[0020] The second upper connecting device includes a second fixed plate, a second guide post, a second slide plate connecting rod and a second slide plate. The bottom end of the second guide post is connected to the panel, and the top end is connected to the second fixed plate. The second upper electric cylinder is connected to the top of the second fixed plate. The electric cylinder telescopic screw head of the second upper electric cylinder passes through a reserved through hole in the middle of the second fixed plate and is connected to the top end of the second slide plate connecting rod. The bottom end of the second slide plate connecting rod is connected to the upper forming die. The upper forming die is connected to the middle of the second slide plate. The second slide plate is slidably connected to the second guide post;

[0021] The second lower connecting device includes a second cover plate and a second cover plate connecting rod. The second cover plate is connected to the bottom end of the second cover plate connecting rod, and the top end of the second cover plate connecting rod is connected to the panel. The second lower electric cylinder is connected to the bottom of the second cover plate. The electric cylinder telescopic screw head of the second lower electric cylinder passes through a reserved through hole in the middle of the second cover plate and is connected to the lower forming die.

[0022] As a further improved technical solution of this patent, the bottom end of the second guide post is tightly connected to the panel by a nut, and the top end is tightly connected to the second fixed plate by a nut. The second upper electric cylinder is connected to the top of the second fixed plate by screws. The electric cylinder telescopic screw head of the second upper electric cylinder passes through a reserved through hole in the middle of the second fixed plate and is threadedly connected to the top end of the second slide plate connecting rod. The bottom end of the second slide plate connecting rod is threadedly connected to the upper forming die. The upper forming die is connected to the middle of the second slide plate by screws. The second slide plate is slidably connected to the second guide post through a guide post sleeve;

[0023] The second cover plate is connected to the bottom end of the second cover plate connecting rod by screws, and the top end of the second cover plate connecting rod is threadedly connected to the panel. The second lower electric cylinder is connected to the bottom of the second cover plate by screws. The electric cylinder telescopic screw head of the second lower electric cylinder passes through a reserved through hole in the middle of the second cover plate and is threadedly connected to the lower forming die;

[0024] Both the second upper electric cylinder and the second lower electric cylinder are electrically connected to the electric control operation table.

[0025] As a further improved technical solution of this patent, the bottom of the upper cone heating film has the same shape as the top of the lower cone heating film, including a left concave arc section, a middle horizontal section, and a right concave arc section. The left concave arc section and the right concave arc section are symmetrical to each other;

[0026] The bottom of the upper forming die and the top of the lower forming die have the same shape, which is a convex character shape.

[0027] As a further improved technical solution of this patent, a pipe clamp is also connected to the moving workbench. The pipe clamp includes a vertical bracket, a horizontal rod, and a pipe clip for clamping the pipe. The bottom of the vertical bracket is connected to the moving workbench by screws. A plurality of mounting holes are provided on the vertical bracket. One end of the horizontal rod is connected to one of the mounting holes, and the other end of the horizontal rod is connected to the pipe clip.

[0028] As a further improved technical solution of this patent, mechanical limit blocks are also provided at the left end and the right end of the panel. A plastic cushion block is provided on the surface of the mechanical limit block facing the moving workbench. The inner lining hollow pipe is a tetrafluoroethylene inner lining hollow pipe.

[0029] The beneficial effects of this patent are:

[0030] In the two-way flanging forming equipment of this patent, in the conical surface forming unit located at the heating station, under the push of the first upper electric cylinder and the first lower electric cylinder, the upper conical heating die and the lower conical heating die move linearly, and the two ends of the PTFE hollow tube lined in the pipe flange are respectively hot-pressed and bent to 60 degrees. The upper conical heating die and the lower conical heating die withdraw synchronously, and the pipe flange is replaced to the next station. Under the push of the second upper electric cylinder and the second lower electric cylinder, the upper forming die and the lower forming die simultaneously bend the two ends of the PTFE hollow tube lined in the pipe flange by 90 degrees and keep the pressure for shaping. Ensure that the upper and lower end faces of the lined PTFE hollow tube are flat and pressed into shape with consistent dimensions. This mechanism can adjust the working stroke, programmed heating time, and pressure-holding time according to the size of the product flanging. Compared with manual forming, the two-way flanging forming equipment of this patent can simultaneously perform equal flanging on both end faces of the PTFE hollow tube lined in the pipe flange, ensuring that the bending forces on both sides of the processed pipe are uniform and consistent, and the end faces are flat; greatly improving production efficiency, reducing labor, and making the quality of the processed products more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the states of the pipe flange with a lined PTFE hollow tube at four stations of the two-way flanging forming equipment respectively. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following further describes the specific embodiments of this patent with reference to the drawings:

[0033] As Figure 1 shown, a two-way flanging forming equipment for a lined hollow tube includes a frame 1, a panel 2, linear guide rails 3, a moving workbench 8, a conical surface forming unit, and an end face forming unit. The moving workbench 8 is used to place the pipe flange 12 with a lined PTFE hollow tube 13, and there are pipe flanges 12 at both ends of the pipe 11.

[0034] The frame 1 is fixedly connected with a panel 2, and two mutually parallel linear guide rails 3 are fixedly connected to the panel 2. The moving workbench 8 is slidably connected to the linear guide rails 3 through sliders 7. The end face forming unit is located at the next station of the conical surface forming unit. Both the panel 2 and the moving workbench 8 are provided with notches for avoiding the movement of the lower conical heating film 32 and the lower forming die 42. The lined hollow tube is the PTFE hollow tube 13.

[0035] As Figure 1 shown, the moving workbench 8 includes an upper moving workbench plate 9 and a lower moving workbench plate 10. The upper moving workbench plate 9 is connected to the lower moving workbench plate 10. The upper moving workbench plate 9 is located above the lower moving workbench plate 10. Both the upper moving workbench plate 9 and the lower moving workbench plate 10 are provided with notches for avoiding the movement of the lower conical heating film 32 and the lower forming die 42 to pass through.

[0036] The conical surface forming unit includes a first upper telescopic drive mechanism, an upper conical heating film 27, a first lower telescopic drive mechanism, and a lower conical heating film 32. The first upper telescopic drive mechanism is connected above the panel 2 through a first upper connecting device. The telescopic head of the first upper telescopic drive mechanism is connected to the upper conical heating film 27. The first lower telescopic drive mechanism is connected below the panel 2 through a first lower connecting device. The telescopic head of the first lower telescopic drive mechanism is connected to the lower conical heating film 32. The upper conical heating film 27 and the lower conical heating film 32 are located in the same vertical direction.

[0037] As Figure 1 shown, the first upper telescopic drive mechanism adopts a first upper electric cylinder 18, and the first lower telescopic drive mechanism adopts a first lower electric cylinder 33.

[0038] As Figure 1 shown, the first upper connecting device includes a square first fixing plate 21, four first guide columns 20, a first slide plate connecting rod 23, and a square first slide plate 48. The bottom ends of the four first guide columns 20 are respectively locked and connected to the panel 2 through nuts. The top ends of the four first guide columns 20 are respectively locked and connected to the four corner positions of the first fixing plate 21 through nuts. The first upper electric cylinder 18 is connected to the middle position at the top of the first fixing plate 21 through screws 19. The electric cylinder telescopic screw head 22 of the first upper electric cylinder 18 passes through a reserved through hole in the middle of the first fixing plate 21 and is threadedly connected to the top end of the first slide plate connecting rod 23. The bottom end of the first slide plate connecting rod 23 is threadedly connected to a threaded hole in the middle of the upper die head connecting sleeve 24. The upper die head connecting sleeve 24 is connected to the middle of the first slide plate 48 through screws 19. The four corner positions of the first slide plate 48 are respectively slidably connected to the four first guide columns 20 through guide bushings 28. The upper die head connecting sleeve 24 is connected to the upper conical heating film 27 through screws 19. An insulating pad 47 is provided between the upper die head connecting sleeve 24 and the upper conical heating film 27. The insulating pad 47 is used to prevent part of the heat from being transmitted to the first upper electric cylinder 18. A heating rod 26 is embedded inside the upper conical heating film 27. The connecting wire of the heating rod 26 passes through a reserved hole in the insulating pad 47 and a cavity 25 between the upper die head connecting sleeve 24 and the insulating pad 47 and is electrically connected to an electric control operation table 4. The first slide plate connecting rod 23 is an adjustable connecting shaft, and the height of the first upper electric cylinder 18 and the first slide plate 48 can be adjusted according to the length of the workpiece to ensure that the strokes of the first upper electric cylinder 18 and the first lower electric cylinder 33 are the same.

[0039] The first lower connecting device includes a first cover plate 30 and a first cover plate connecting rod 29. The first cover plate 30 is connected to the bottom end of the first cover plate connecting rod 29 by screws 19. The top end of the first cover plate connecting rod 29 is threadedly connected to the panel 2. The first lower electric cylinder 33 is connected to the bottom of the first cover plate 30 by screws 19. The electric cylinder telescopic screw head 22 of the first lower electric cylinder 33 passes through a reserved through hole in the middle of the first cover plate 30 and is threadedly connected to the lower die head connecting sleeve 31. The lower die head connecting sleeve 31 is connected to the lower cone heating film 32 by screws 19. A heat insulation pad 47 is provided between the lower die head connecting sleeve 31 and the lower cone heating film 32. The heat insulation pad 47 is used to prevent part of the heat from being transmitted to the second upper electric cylinder 33. A heating rod 26 is embedded inside the lower cone heating film 32. The connecting wire of the heating rod 26 passes through the reserved hole of the heat insulation pad 47 and the cavity 25 between the lower die head connecting sleeve 31 and the heat insulation pad 47 and is electrically connected to an electric control operation table 4.

[0040] The bottom of the upper cone heating film 27 has the same shape as the top of the lower cone heating film 32, including a left concave arc section, a middle horizontal section, and a right concave arc section. The left concave arc section and the right concave arc section are symmetrical to each other. The left concave arc section and the right concave arc section are used to bend the inner lining PTFE hollow tube 13 into an arc shape.

[0041] The first upper electric cylinder 18 and the first lower electric cylinder 33 are both electrically connected to the electric control operation table 4, and the electric control operation table 4 is electrically connected to a power supply. The electric control operation table 4 uses an existing common controller operation table, which is used to control the actions of the electric cylinders and the heating of the heating rod 26.

[0042] The end face forming unit includes a second upper telescopic driving mechanism, an upper forming die 39, a second lower telescopic driving mechanism, and a lower forming die 42. The second upper telescopic driving mechanism is connected above the panel 2 through a second upper connecting device. The telescopic head of the second upper telescopic driving mechanism is connected to the upper forming die 39. The second lower telescopic driving mechanism is connected below the panel 2 through a second lower connecting device. The telescopic head of the second lower telescopic driving mechanism is connected to the lower forming die 42. The upper forming die 39 and the lower forming die 42 are located in the same vertical direction.

[0043] As Figure 1 shown, the second upper telescopic driving mechanism uses a second upper electric cylinder 34, and the second lower telescopic driving mechanism uses a second lower electric cylinder 43.

[0044] As Figure 1As shown in the figure, the second upper connecting device includes a square second fixing plate 35, four second guide posts 37, a second slide bar connecting rod 36 and a square second slide plate 38. The bottom ends of the four second guide posts 37 are locked and connected to the panel 2 by nuts. The top ends of the four second guide posts 37 are respectively locked and connected to the four corner positions of the second fixing plate 35 by nuts. The second upper electric cylinder 34 is connected to the middle position at the top of the second fixing plate 35 by screws 19. The electric cylinder telescopic screw head 22 of the second upper electric cylinder 34 passes through a reserved through hole in the middle of the second fixing plate 35 and is threadedly connected to the top end of the second slide bar connecting rod 36. The bottom end of the second slide bar connecting rod 36 is threadedly connected to the upper forming die 39. The upper forming die 39 is connected to the middle of the second slide plate 38 by screws 19. The four corner positions of the second slide plate 38 are respectively slidably connected to the four second guide posts 37 through guide post sleeves 28. The second slide bar connecting rod 36 is an adjustable connecting shaft, and the height between the second upper electric cylinder 34 and the second slide plate 38 can be adjusted according to the length of the workpiece to ensure that the strokes of the second upper electric cylinder 34 and the second lower electric cylinder 43 are consistent.

[0045] The second lower connecting device includes a second cover plate 41 and a second cover plate connecting rod 40. The second cover plate 41 is connected to the bottom end of the second cover plate connecting rod 40 by screws 19. The top end of the second cover plate connecting rod 40 is threadedly connected to the panel 2. The second lower electric cylinder 43 is connected to the bottom of the second cover plate 41 by screws 19. The electric cylinder telescopic screw head 22 of the second lower electric cylinder 43 passes through a reserved through hole in the middle of the second cover plate 41 and is threadedly connected to the lower forming die 42.

[0046] The bottom of the upper forming die 39 and the top of the lower forming die 42 have the same shape, which is a convex character shape. The convex character-shaped upper forming die 39 and lower forming die 42 are used to bend the inner lining four-fluorine hollow pipe 13 to 90 degrees.

[0047] Both the second upper electric cylinder 34 and the second lower electric cylinder 43 are electrically connected to the electric control operation table 4.

[0048] A pipe clamp is also connected to the moving workbench 8. The pipe clamp 46 includes a vertical bracket 45, a horizontal rod 44 and a pipe clip for clamping the pipe 11 (using an existing common pipe clip structure (such as a pipe buckle, a pipe hoop, etc., not shown in the figure)). The bottom of the vertical bracket 45 is connected to the moving workbench 8 by screws 19. A plurality of mounting holes are provided on the vertical bracket 45. The threaded end of the horizontal rod 44 is locked and connected to one of the mounting holes by a nut. The other end of the horizontal rod 44 is connected to the pipe clip.

[0049] For the first upper electric cylinder 18 and the first lower electric cylinder 33 in this embodiment, the working strokes can be set according to the product height, with the initial base point position and the limit positions of the effective working strokes determined to ensure the stability of dimensions. Inside the upper cone heating film 27 and the lower cone heating die 32, 4 heating rods 26 and temperature measurement and feedback devices are respectively installed. The temperature measurement and feedback devices are electrically connected to the electric control operation console 4. The temperature measurement and feedback devices measure the temperature of the heating film in real time, feedback it to the controller in the electric control operation console 4, and display it on the display screen of the electric control operation console 4 for the user's reference.

[0050] In this embodiment, the linear guide 3 is sequentially divided into a feeding station 14, a heating station 15, a forming station 16, and a discharging station 17 from right to left. Pin holes are provided on the linear guide 3 at the heating station 15 and the forming station 16 for inserting positioning pins to position the moving workbench 8 located at this station (that is, there are positioning pins in front of and behind the moving workbench 8 to prevent the moving workbench 8 from sliding).

[0051] For the double-sided flanging forming equipment in this embodiment, in the conical surface forming unit at the heating station 15, under the push of the first upper electric cylinder 18 and the first lower electric cylinder 33, the upper cone heating die 27 and the lower cone heating die 32 move linearly. The inner liner PTFE hollow tube 13 can be first hot-pressed and bent to 60 degrees (as shown by the inner liner PTFE hollow tube 13 at the heating station 15). The upper cone heating die 27 and the lower cone heating die 33 retract synchronously, and the working station should be quickly changed. Manually slide the moving workbench 8 to the forming station 16. Under the push of the second upper electric cylinder 34 and the second lower electric cylinder 43, the upper forming die 39 and the lower forming die 42 simultaneously bend the inner liner PTFE hollow tube 13 by 90 degrees and hold the pressure for shaping. Ensure that the upper and lower end faces of the inner liner PTFE hollow tube 13 are flat and the pressed shape is consistent, with the same dimensions. This mechanism can adjust the working stroke, programmed heating time, and pressure holding time according to the size of the product flanging dimension. Figure 1 As shown by the inner liner PTFE hollow tube 13 at the heating station 15). The upper cone heating die 27 and the lower cone heating die 33 retract synchronously, and the working station should be quickly changed. Manually slide the moving workbench 8 to the forming station 16. Under the push of the second upper electric cylinder 34 and the second lower electric cylinder 43, the upper forming die 39 and the lower forming die 42 simultaneously bend the inner liner PTFE hollow tube 13 by 90 degrees and hold the pressure for shaping. Ensure that the upper and lower end faces of the inner liner PTFE hollow tube 13 are flat and the pressed shape is consistent, with the same dimensions. This mechanism can adjust the working stroke, programmed heating time, and pressure holding time according to the size of the product flanging dimension.

[0052] The specific work is as follows: Place the pipe flange 12 of the inner-lined PTFE hollow pipe 13 on the moving workbench 8 at the loading station 14, manually slide the moving workbench 8 to the pin hole at the heating station 15 (i.e., the pin hole on the heating station 15 of the linear guide rail 3), and insert a positioning pin into the pin hole to position the moving workbench 8 at the heating station 15; Adjust the height of the cross bar 44 according to the total length of the pipe 11 and the pipe flange 12 (i.e., connect the mounting holes at different heights on the cross bar 44 and the vertical bracket 45 to adjust the height of the cross bar 44), and rely on the pipe clamp to lock the pipe 11 connected to the pipe flange 12 to prevent the pipe flange 12 from tilting left, right, forward, or backward. The user controls the heating rods 26 in the upper cone heating die 27 and the lower cone heating die 32 to be powered on for heating through the electric control console 4. The upper cone heating die 27 and the lower cone heating die 32 start preheating. When the temperature measurement feedback device detects that the set temperature is reached, the user controls the first upper electric cylinder 18 and the first lower electric cylinder 33 to perform uniform linear motion simultaneously through the electric control console 4. The first slide plate 48 moves downward along the first guide post 20, the upper cone heating die 27 moves downward at a uniform speed, and the lower cone heating die 32 moves upward at a uniform speed. After the upper cone heating die 27 and the lower cone heating die 32 move uniformly to the set length and stop (at this time, the upper cone heating die 27 bends the upper pipe edge of the inner-lined PTFE hollow pipe 13 to 60 degrees, and the lower cone heating die 32 bends the lower pipe edge of the inner-lined PTFE hollow pipe 13 to 60 degrees), the internal heating rods 26 continue to heat, keep warm and maintain pressure until the set time. Then, the first upper electric cylinder 18 and the first lower electric cylinder 33 start to return to the base point position synchronously. Pull out the positioning pin on the heating station 15 from the pin hole, quickly move the moving workbench 8 to the pin hole at the forming station 16 (i.e., the pin hole on the forming station 16 of the linear guide rail 3), and insert a positioning pin into the pin hole to position the moving workbench 8 at the forming station 16; The user controls the second upper electric cylinder 34 and the second lower electric cylinder 43 to perform uniform linear motion simultaneously through the electric control console 4. At this time, the second upper electric cylinder 34 drives the upper forming die 39 to move downward in a straight line (the second slide plate 38 moves downward along the second guide post 37), and the second lower electric cylinder 43 drives the lower forming die 42 to move upward in a straight line. The upper forming die 39 presses the upper pipe edge of the inner-lined PTFE hollow pipe 13 along the 60° arc-shaped inclined plane of the upper pipe edge of the inner-lined PTFE hollow pipe 13 to 90 degrees, and the lower forming die 42 presses the lower pipe edge of the inner-lined PTFE hollow pipe 13 along the 60° arc-shaped inclined plane of the lower pipe edge of the inner-lined PTFE hollow pipe 13 to 90 degrees. After the pressure holding and shaping are completed, the second upper electric cylinder 34 and the second lower electric cylinder 43 drive the upper forming die 39 and the lower forming die 42 to return to the upper and lower base point positions. Pull out the positioning pin of the forming station 16 from the pin hole, disassemble the pipe clamp 46 on the moving workbench 8, move it to the left unloading station 17, and remove the pipe flange 12 of the double-sided inner-lined PTFE hollow pipe 13 after flanging and forming.

[0053] At the left and right ends of the panel 2 of this embodiment, mechanical limit blocks 5 are also connected by screws, and a plastic cushion block 6 is arranged on the side of the mechanical limit block 5 facing the moving workbench 8. After removing the mechanical limit block 5, in this embodiment, the linear guide rail 3 can also be set as an annular guide rail, and the moving workbench 8 located at the blanking station 17 can slide back along the annular guide rail to the loading station 14.

[0054] The protection scope of this patent includes but is not limited to the above embodiments. The protection scope of this patent is subject to the claims, and any replacement, deformation, and improvement that are easily conceivable by those skilled in the art for this technology fall within the protection scope of this patent.

Claims

1. A double-sided flanging forming device for a hollow inner tube, characterized in that: It includes a frame, a panel, linear guides, a moving workbench, a conical surface forming unit, and an end face forming unit; A panel is fixedly connected to the frame, and linear guides are fixedly connected to the panel. The moving workbench is slidably connected to the linear guides through sliders; The conical surface forming unit includes a first upper telescopic driving mechanism, an upper conical heating film, a first lower telescopic driving mechanism, and a lower conical heating film. The first upper telescopic driving mechanism is connected above the panel through a first upper connecting device. The telescopic head of the first upper telescopic driving mechanism is connected to the upper conical heating film. The first lower telescopic driving mechanism is connected below the panel through a first lower connecting device. The telescopic head of the first lower telescopic driving mechanism is connected to the lower conical heating film; The end face forming unit includes a second upper telescopic driving mechanism, an upper forming die, a second lower telescopic driving mechanism, and a lower forming die. The second upper telescopic driving mechanism is connected above the panel through a second upper connecting device. The telescopic head of the second upper telescopic driving mechanism is connected to the upper forming die. The second lower telescopic driving mechanism is connected below the panel through a second lower connecting device. The telescopic head of the second lower telescopic driving mechanism is connected to the lower forming die; The end face forming unit is located at the next working station of the conical surface forming unit. Notches for avoiding the movement of the lower conical heating film and the lower forming die are provided on both the panel and the moving workbench; In the conical surface forming unit: the first upper telescopic driving mechanism uses a first upper electric cylinder, and the first lower telescopic driving mechanism uses a first lower electric cylinder; in the end face forming unit: the second upper telescopic driving mechanism uses a second upper electric cylinder, and the second lower telescopic driving mechanism uses a second lower electric cylinder; The first upper connecting device includes a first fixing plate, a first guide post, a first slide plate connecting rod, and a first slide plate. The bottom end of the first guide post is connected to the panel, and the top end is connected to the first fixing plate. The first upper electric cylinder is connected to the top of the first fixing plate. The electric cylinder telescopic screw head of the first upper electric cylinder passes through a reserved through hole in the middle of the first fixing plate and is connected to the top end of the first slide plate connecting rod. The bottom end of the first slide plate connecting rod is connected to an upper die head connecting sleeve. The upper die head connecting sleeve is connected to the middle of the first slide plate. The first slide plate is slidably connected to the first guide post. The upper die head connecting sleeve is connected to the upper conical heating film; The first lower connecting device includes a first cover plate and a first cover plate connecting rod. The first cover plate is connected to the bottom end of the first cover plate connecting rod, and the top end of the first cover plate connecting rod is connected to the panel. The first lower electric cylinder is connected to the bottom of the first cover plate. The electric cylinder telescopic screw head of the first lower electric cylinder passes through a reserved through hole in the middle of the first cover plate and is connected to a lower die head connecting sleeve. The lower die head connecting sleeve is connected to the lower conical heating film; The bottom of the upper conical heating film has the same shape as the top of the lower conical heating film, including a left concave arc section, a middle horizontal section, and a right concave arc section. The left concave arc section and the right concave arc section are symmetrical to each other. The bottom of the upper forming die and the top of the lower forming die have the same shape, which is a convex character shape.

2. The two-way flanging forming device for the inner lining hollow tube according to claim 1, wherein: The bottom end of the first guide post is tightly connected to the panel by a nut, and the top end is tightly connected to the first fixing plate by a nut. The first upper electric cylinder is connected to the top of the first fixing plate by screws. The electric cylinder telescopic screw head of the first upper electric cylinder is threadedly connected to the top end of the first slide plate connecting rod. The bottom end of the first slide plate connecting rod is threadedly connected to the upper die head connecting sleeve. The upper die head connecting sleeve is connected to the middle part of the first slide plate by screws. The first slide plate is slidably connected to the first guide post through a guide post sleeve. The upper die head connecting sleeve is connected to the upper conical heating film by screws; The first cover plate is connected to the bottom end of the first cover plate connecting rod by screws, and the top end of the first cover plate connecting rod is threadedly connected to the panel. The first lower electric cylinder is connected to the bottom of the first cover plate by screws. The electric cylinder telescopic screw head of the first lower electric cylinder passes through the reserved through hole in the middle of the first cover plate and is threadedly connected to the lower die head connecting sleeve. The lower die head connecting sleeve is connected to the lower conical heating film by screws.

3. The inner liner hollow tube double-sided flanging forming equipment according to claim 1, characterized in that: An insulating pad is provided between the upper die head connecting sleeve and the upper conical heating film. A heating rod is embedded inside the upper conical heating film. The connecting wire of the heating rod passes through the reserved hole of the insulating pad and the concave cavity between the upper die head connecting sleeve and the insulating pad and is electrically connected to an electric control operating table; An insulating pad is provided between the lower die head connecting sleeve and the lower conical heating film. A heating rod is embedded inside the lower conical heating film. The connecting wire of the heating rod passes through the reserved hole of the insulating pad and the concave cavity between the lower die head connecting sleeve and the insulating pad and is electrically connected to an electric control operating table; Both the first upper electric cylinder and the first lower electric cylinder are electrically connected to the electric control operating table, and the electric control operating table is electrically connected to a power supply.

4. The two-way flanging forming device for the inner lining hollow tube according to claim 1, characterized in that: In the end face forming unit: The second upper connecting device includes a second fixing plate, a second guide post, a second slide plate connecting rod and a second slide plate. The bottom end of the second guide post is connected to the panel, and the top end is connected to the second fixing plate. The second upper electric cylinder is connected to the top of the second fixing plate. The electric cylinder telescopic screw head of the second upper electric cylinder passes through the reserved through hole in the middle of the second fixing plate and is connected to the top end of the second slide plate connecting rod. The bottom end of the second slide plate connecting rod is connected to the upper forming die. The upper forming die is connected to the middle part of the second slide plate. The second slide plate is slidably connected to the second guide post; The second lower connecting device includes a second cover plate and a second cover plate connecting rod. The second cover plate is connected to the bottom end of the second cover plate connecting rod, and the top end of the second cover plate connecting rod is connected to the panel. The second lower electric cylinder is connected to the bottom of the second cover plate. The electric cylinder telescopic screw head of the second lower electric cylinder passes through the reserved through hole in the middle of the second cover plate and is connected to the lower forming die.

5. The two-way flanging forming device for the inner lining hollow tube according to claim 4, characterized in that: The bottom end of the second guide post is tightly connected to the panel by a nut, and the top end is tightly connected to the second fixing plate by a nut. The second upper electric cylinder is connected to the top of the second fixing plate by screws. The electric cylinder telescopic screw head of the second upper electric cylinder passes through the reserved through hole in the middle of the second fixing plate and is threadedly connected to the top end of the second slide plate connecting rod. The bottom end of the second slide plate connecting rod is threadedly connected to the upper forming die. The upper forming die is connected to the middle part of the second slide plate by screws. The second slide plate is slidably connected to the second guide post through a guide post sleeve; The bottom end of the second cover plate is connected to the bottom end of the second cover plate connecting rod by screws, the top end of the second cover plate connecting rod is threadedly connected to the panel, the second lower electric cylinder is connected to the bottom of the second cover plate by screws, and the electric cylinder telescopic screw head of the second lower electric cylinder passes through a reserved through hole in the middle of the second cover plate and is threadedly connected to the lower forming die; Both the second upper electric cylinder and the second lower electric cylinder are electrically connected to the electric control operation table.

6. The double-sided flanging forming device for the inner lining hollow tube according to claim 1, characterized in that: A pipe clamp is further connected to the mobile workbench. The pipe clamp includes a vertical bracket, a transverse rod, and a pipe clip for clamping the pipe. The bottom of the vertical bracket is connected to the mobile workbench by screws. A plurality of mounting holes are provided on the vertical bracket. One end of the transverse rod is connected to one of the mounting holes, and the other end of the transverse rod is connected to the pipe clip.

7. The double-sided flanging forming device for the inner-lined hollow tube according to claim 1, wherein: Mechanical limit blocks are further provided at the left end and the right end of the panel. Plastic cushion blocks are provided on the surface of the mechanical limit blocks facing the mobile workbench. The inner lining hollow pipe is a tetrafluoroethylene-lined hollow pipe.

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