Titanium alloy lining composite pipe forming machine

Abstract

This application discloses a titanium alloy-lined composite pipe forming machine, including a machine base, a three-jaw chuck, a pipe support mechanism, a moving mechanism, a rotating mechanism, and an internal pressure forming mechanism. The three-jaw chuck and the pipe support mechanism fix the composite pipe (outer pipe, middle support pipe, and titanium alloy inner pipe); the moving mechanism drives the rotating mechanism and the internal pressure forming mechanism to move axially; the rotating mechanism drives the internal pressure forming mechanism to rotate; the inner pressure roller of the internal pressure forming mechanism can expand outward to apply radial pressure to the pipe. During operation, the outer pipe is first fixed, the middle support pipe and the inner pipe are inserted, and the ends are flush by pushing with the side pressure plate and using limit switches. Then, the internal pressure forming mechanism rotates and moves to complete the pressing. This forming machine can eliminate interlayer gaps, enhance the bonding stability, reduce delamination, extend the service life of the pipe, and has a high degree of automation and strong adaptability.

Description

Technical Field

[0001] This application relates to the field of composite pipe forming technology, and more specifically to a forming machine for titanium alloy lined composite pipes. Background Technology

[0002] Titanium alloy-lined composite pipe fittings, combining the excellent corrosion resistance and high strength of titanium alloys with the specific advantages of the outer pipe material, have broad application prospects in many fields such as chemical, petroleum, and seawater desalination. However, current titanium alloy-lined composite pipe fittings on the market exhibit a series of problems during production and use. In terms of manufacturing processes, traditional processes for manufacturing titanium alloy-lined composite pipe fittings struggle to ensure a tight and stable connection between the inner and outer titanium alloy pipes. A common issue is the existence of gaps between the inner and outer pipes. This not only fails to fully utilize the synergistic advantages of the composite material but also, during long-term use, is prone to delamination and detachment due to factors such as fluid erosion, temperature changes, and mechanical vibration. This significantly shortens the service life of the fittings and increases maintenance costs and safety hazards. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this application is to provide a titanium alloy-lined composite pipe forming machine to solve the problems mentioned in the background art.

[0004] According to one aspect of this application, a titanium alloy-lined composite pipe forming machine includes a machine base, a pipe end clamping mechanism, a pipe body support mechanism, a moving mechanism, a rotating mechanism, and an internal pressure forming mechanism. A vertical support frame is fixedly mounted at one end of the machine base, and the pipe end clamping mechanism is fixedly installed on the support frame. A pipe body support mechanism is fixedly mounted in the middle of the machine base. The pipe end clamping mechanism and the pipe body support mechanism are used to clamp and fix the composite pipe. The composite pipe includes an outer pipe, an inner pipe, and a middle support pipe. The inner pipe is a titanium alloy pipe, and the middle support pipe is an adhesive hose. One end of the outer pipe is fixed... The outer wall of the outer tube is fixedly mounted on the pipe body support mechanism and is located on the pipe end clamping mechanism. The inner wall of the outer tube is in close contact with the outer wall of the middle support tube, and the inner wall of the middle support tube is in close contact with the outer wall of the inner tube. A moving mechanism is provided on the machine base, and a rotating mechanism is installed on the moving mechanism. A side pressure member is fixedly provided at the end of the rotating mechanism away from the composite pipe, and an internal pressure forming mechanism is provided at the end of the rotating mechanism close to the composite pipe. The internal pressure forming mechanism can extend into the interior of the inner tube and press the inner tube, middle support tube, and outer tube into shape.

[0005] Preferably, the rotating mechanism includes a mounting plate, a rotary motor, a transmission plate, a connecting plate, a long shaft, and a side pressure plate. The mounting plate is vertically fixed on the moving mechanism. The rotary motor is fixedly mounted on the mounting plate. The end of the output shaft of the rotary motor is fixedly connected to the center of the transmission plate. The transmission plate is fixedly connected to the connecting plate by bolts. The center of the connecting plate is fixedly connected to one end of the long shaft. The other end of the long shaft extends toward the composite pipe and is fixedly connected to the internal pressure forming mechanism. The axis of the long shaft coincides with the axis of the composite pipe. The side pressure plate is a circular side pressure plate. The center of the side pressure plate is fixedly connected to the end of the long shaft away from the composite pipe.

[0006] Preferably, the internal pressure forming mechanism includes a support frame, a pushing hydraulic cylinder, a connecting push rod, a rotating support, and an internal pressure roller. The circumferential dimension of the support frame is smaller than the inner diameter of the inner tube. One end of the support frame is fixedly connected to the other end of the long shaft, and the other end of the support frame faces the composite pipe. A pushing hydraulic cylinder is fixedly installed inside the support frame. The extension rod of the pushing hydraulic cylinder faces the composite pipe, and a connecting block is fixedly provided at its end. Multiple outward expansion channels are equidistantly arranged along the circumference of the outer side of the support frame, and each outward expansion channel corresponds to a specific channel on the support frame. Rotary supports are provided at each position, and an inner pressure roller is rotatably mounted on each of the rotating supports. Sliding sleeves are fixedly provided on both sides of each of the outward expansion channels, and sliding plates are fixedly provided on both sides of each of the rotating supports corresponding to the positions of the sliding sleeves. The shape and size of the sliding plates are adapted to the shape and size of the sliding sleeves. The sliding plates are slidably disposed in the sliding sleeves, and the sliding direction of the sliding plates is arranged along the radial direction of the support frame. The bottom center of each rotating support is hinged to one end of a connecting push rod, and the other end of the connecting push rod is hinged to the connecting block.

[0007] Preferably, the axis of the support frame coincides with the axis of the long axis, the push hydraulic cylinder is disposed on the central axis of the support frame and the axes of the two coincide, and the vertical distance between the axis of each inner pressure roller and the axis of the push hydraulic cylinder is consistent.

[0008] Preferably, an elastic column is fixedly provided on the end of the support frame facing the composite pipe, and a limit switch is provided inside the elastic column, the limit switch being installed on the support frame.

[0009] Preferably, the distance between the side pressure plate and the elastic column is equal to the axial length of the composite pipe.

[0010] Preferably, the pipe support mechanism includes a base frame, a fixed frame, a supporting hydraulic cylinder, and an arc-shaped clamp. The base frame is fixedly mounted on the machine base. The fixed frame is fixedly mounted on the top of the base frame. The fixed frame is a circumferentially closed structure. Multiple supporting hydraulic cylinders are fixedly mounted at equal intervals along the outer periphery of the fixed frame. The extension rod of each supporting hydraulic cylinder is oriented towards the axis of the composite pipe, and an arc-shaped clamp is fixedly mounted at the end of the extension rod of each supporting hydraulic cylinder. The inner arc surface of the arc-shaped clamp is in close contact with the outer wall of the outer pipe.

[0011] Preferably, the moving mechanism includes a drive motor, a lead screw, a nut seat, a moving seat, a slider, and a slide rail. The drive motor is fixedly mounted on the machine base. The output shaft of the drive motor is fixedly connected to the end of the lead screw. The axial direction of the lead screw is parallel to the axial direction of the composite pipe. Both ends of the lead screw are mounted on the machine base via support seats. A nut seat is threaded onto the lead screw. The top of the nut seat is fixedly connected to the bottom surface of the moving seat. Sliders are fixedly mounted on both sides of the bottom surface of the moving seat. The sliders are slidably mounted on the slide rail. The slide rail is fixedly mounted on the machine base, and the axial direction of the slide rail is parallel to the axial direction of the lead screw. The mounting plate is fixedly mounted on the top surface of the moving seat. A rotating support mechanism is also fixedly mounted on the moving seat to support the long shaft.

[0012] Preferably, the rotating support mechanism includes a second fixed frame, a second supporting hydraulic cylinder, and supporting rollers. The second fixed frame is fixedly mounted on the movable seat. The second fixed frame is a circumferentially closed structure. Multiple second supporting hydraulic cylinders are fixedly mounted at equal intervals along the outer periphery of the second fixed frame. The extension rod of each second supporting hydraulic cylinder is oriented towards the axis of the long shaft, and a supporting roller is rotatably mounted at the end of the extension rod of each second supporting hydraulic cylinder. The rotation axis of the supporting roller is parallel to the axis of the long shaft. The supporting roller is in close rotational contact with the outer wall of the long shaft, and the supporting roller is located between the side pressure plate and the connecting plate.

[0013] Preferably, the pipe end clamping mechanism is a non-rotating three-jaw chuck.

[0014] The advantages of this application compared to existing technologies are as follows: The titanium alloy-lined composite pipe forming machine of this application, through the synergistic action of the internal pressure forming mechanism, can apply uniform and controllable radial pressure to the inner pipe, middle support pipe, and outer pipe of the composite pipe. During the rotation and movement of the internal pressure roller, the titanium alloy inner pipe, the middle support pipe made of viscous rubber hose material, and the outer pipe material can achieve a tight fit, effectively eliminating the interlayer gaps commonly found in traditional processes. The viscous properties of the middle support pipe are further enhanced under pressure, strengthening the stability of the interlayer connection and reducing delamination caused by fluid erosion, temperature changes, or mechanical vibration during long-term use, thus extending the service life of the pipe. The pipe body support mechanism uses multiple supports... A hydraulic cylinder drives an arc-shaped clamping plate, providing a uniform circumferential clamping force from the outside of the outer tube. This ensures the tube remains axially stable during forming, preventing radial offset from affecting forming accuracy. The rotating support mechanism provides reliable support to the long axis via support rollers. Combined with the stable transmission of the rotating mechanism, this ensures the rotation axis of the inner pressure forming mechanism always coincides with the tube's axis, resulting in a more uniform pressure distribution from the inner pressure roller and further improving the consistency of product forming quality. The moving mechanism, driven by a screw and nut and guided by a slide rail, achieves precise axial movement of the inner pressure forming mechanism. The rotating mechanism, driven by a motor, ensures stable rotation of the inner pressure roller. Together, these mechanisms enable continuous forming operations across the entire length of the tube. The combined design of the elastic column and limit switch ensures the ends of the composite tube are flush during assembly, reducing manual alignment errors and improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a perspective view of a titanium alloy composite pipe forming machine according to an embodiment of this application.

[0016] Figure 2 This is a front view of a titanium alloy composite pipe forming machine according to an embodiment of this application.

[0017] Figure 3 This is a side view of the composite pipe side of a titanium alloy liner composite pipe forming machine according to an embodiment of this application.

[0018] Figure 4 This is a side view of the rotating mechanism side of a titanium alloy composite pipe forming machine according to an embodiment of this application.

[0019] Figure 5 This is a perspective view of the rotating mechanism and the internal pressure forming mechanism of a titanium alloy composite pipe forming machine according to an embodiment of this application.

[0020] Figure 6 This is an internal structural diagram of the internal pressure forming mechanism of a titanium alloy composite pipe forming machine according to an embodiment of this application.

[0021] Reference numerals: 1. Machine base; 2. Three-jaw chuck; 3. Tube support mechanism; 31. Base frame; 32. Fixed frame one; 33. Support hydraulic cylinder one; 34. Arc-shaped clamping plate; 4. Moving mechanism; 41. Drive motor; 42. Lead screw; 43. Nut seat; 44. Moving seat; 45. Slider; 46. Slide rail; 5. Rotating mechanism; 51. Mounting plate; 52. Rotary motor; 53. Transmission plate; 54. Connecting plate; 55. Long shaft; 56. Side pressure plate; 6. Internal pressure forming mechanism; 61. Support frame; 62. Pushing hydraulic cylinder; 63. Linking push rod; 64. Rotating support; 65. Internal pressure roller; 66. Connecting block; 67. Outward expansion channel; 68. Sliding sleeve; 69. Sliding plate; 7. Rotating support mechanism; 71. Fixed frame two; 72. Supporting hydraulic cylinder two; 73. Supporting roller; 8. Stand; 9. Composite pipe fitting; 91. Outer pipe; 92. Inner pipe; 93. Middle support pipe; 10. Elastic column; 11. Limit switch. Detailed Implementation

[0022] To make the content of this application easier to understand, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the accompanying drawings. Figure 2 In this context, the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, terms such as "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0023] like Figures 1-6As shown, the forming machine for titanium alloy lined composite pipe fittings 9 includes a machine base 1, a three-jaw chuck 2, a pipe support mechanism 3, a moving mechanism 4, a rotating mechanism 5, and an internal pressure forming mechanism 6. A vertical support frame 8 is fixedly mounted at one end of the machine base 1, and the three-jaw chuck 2 is fixedly installed on the support frame 8. The pipe support mechanism 3 is fixedly mounted in the middle of the machine base 1. The three-jaw chuck 2 and the pipe support mechanism 3 are used to clamp and fix the composite pipe fitting 9. The composite pipe fitting 9 includes an outer pipe 91, an inner pipe 92, and a middle support pipe 93. The inner pipe 92 is a titanium alloy pipe, and the middle support pipe 93 is an adhesive hose. One end of the outer pipe 91 is fixed to the jaws of the three-jaw chuck 2, and the outer side wall of the outer pipe 91 is fixed to the pipe support mechanism 3. The inner wall of 91 is in close contact with the outer wall of the middle pipe 93, and the inner wall of the middle pipe 93 is in close contact with the outer wall of the inner pipe 92. Specifically, the pipe support mechanism 3 includes a base frame 31, a fixed frame 32, a supporting hydraulic cylinder 33, and an arc-shaped clamping plate 34. The base frame 31 is fixedly mounted on the machine base 1. The fixed frame 32 is fixedly mounted on the top of the base frame 31. The fixed frame 32 is a circumferentially closed structure. Multiple supporting hydraulic cylinders 33 are fixedly mounted at equal intervals along the circumference of the outer side of the fixed frame 32. The extension rod of each supporting hydraulic cylinder 33 is oriented toward the axis of the composite pipe 9, and the end of the extension rod of each supporting hydraulic cylinder 33 is fixedly mounted with an arc-shaped clamping plate 34. The inner arc surface of the arc-shaped clamping plate 34 is in close contact with the outer wall of the outer pipe 91.

[0024] A moving mechanism 4 is provided on the base 1 of the machine body. Specifically, the moving mechanism 4 includes a drive motor 41, a lead screw 42, a nut seat 43, a moving seat 44, a slider 45, and a slide rail 46. The drive motor 41 is fixedly installed on the base 1 of the machine body. The output shaft of the drive motor 41 is fixedly connected to the end of the lead screw 42. The axial direction of the lead screw 42 is parallel to the axial direction of the composite pipe 9. Both ends of the lead screw 42 are installed on the base 1 of the machine body through support seats. The nut seat 43 is threaded on the lead screw 42. The top of the nut seat 43 is fixedly connected to the bottom surface of the moving seat 44. Slider 45 is fixedly provided on both sides of the bottom surface of the moving seat 44. The slider 45 is slidably mounted on the slide rail 46. The slide rail 46 is fixedly mounted on the base 1 of the machine body, and the axial direction of the slide rail 46 is parallel to the axial direction of the lead screw 42. A rotating mechanism 5 is provided on the moving seat 44.

[0025] The rotating mechanism 5 includes a mounting plate 51, a rotary motor 52, a transmission plate 53, a connecting plate 54, a long shaft 55, and a side pressure plate 56. The mounting plate 51 is vertically fixed on the movable seat 44. The rotary motor 52 is fixedly mounted on the mounting plate 51. The end of the output shaft of the rotary motor 52 is fixedly connected to the center of the transmission plate 53. The transmission plate 53 is fixedly connected to the connecting plate 54 by bolts. The center of the connecting plate 54 is fixedly connected to one end of the long shaft 55. The other end of the long shaft 55 extends toward the composite pipe 9 and is fixedly connected to the internal pressure forming mechanism 6. The axis of the long shaft 55 coincides with the axis of the composite pipe 9. The end of the long shaft 55 away from the composite pipe 9 is fixedly connected to the center of the circular side pressure plate 56.

[0026] A rotating support mechanism 70 is also fixedly provided on the movable seat 44. Specifically, the rotating support mechanism 70 includes a fixed frame 71, a supporting hydraulic cylinder 72, and a supporting roller 73. The fixed frame 71 is fixedly provided on the movable seat 44. The fixed frame 71 is a circumferentially closed structure. Multiple supporting hydraulic cylinders 72 are fixedly installed at equal intervals along the circumference of the outer periphery of the fixed frame 71. The extension rod of each supporting hydraulic cylinder 72 is set towards the axis of the long axis 55, and a supporting roller 73 is rotatably installed at the end of the extension rod of each supporting hydraulic cylinder 72. The rotation axis of the supporting roller 73 is parallel to the axis of the long axis 55. The supporting roller 73 is in close rotational contact with the outer wall of the long axis 55, and the supporting roller 73 is located between the side pressure plate 56 and the connecting plate 54.

[0027] The internal pressure forming mechanism 6 can extend into the inner tube 92 and press the inner tube 92, the middle support tube 93, and the outer tube 91 into shape. Specifically, the internal pressure forming mechanism 6 includes a support frame 61, a push hydraulic cylinder 62, a connecting push rod 63, a rotating support 64, and an internal pressure roller 65. The circumferential dimension of the support frame 61 is smaller than the inner diameter of the inner tube 92. One end of the support frame 61 is fixedly connected to the other end of the long shaft 55, and the other end of the support frame 61 is set towards the composite pipe 9. The axis of the support frame 61 coincides with the axis of the long shaft 55. The push hydraulic cylinder 62 is fixedly installed inside the support frame 61. The push hydraulic cylinder 62 is set in the central shaft of the support frame 61 and the axes of the two coincide. The extension rod of the push hydraulic cylinder 62 is set towards the composite pipe 9, and a connecting block 66 is fixedly provided at its end. Three outward expansion channels 67 are equidistantly arranged along the circumference of the outer side of the support frame 61. Each channel 67 corresponds to a different channel on the support frame 61. Rotary supports 64 are provided at the locations of the expansion channels 67. An inner pressure roller 65 is rotatably mounted on each rotating support 64. The vertical distance between the axis of each inner pressure roller 65 and the axis of the hydraulic cylinder 62 is consistent. Sliding sleeves 68 are fixedly provided on both sides of each expansion channel 67. Sliding plates 69 are fixedly provided on both sides of each rotating support 64 at the positions corresponding to the sliding sleeves 68. The shape and size of the sliding plates 69 are adapted to the shape and size of the sliding sleeves 68. The sliding plates 69 are slidably disposed in the sliding sleeves 68, and the sliding direction of the sliding plates 69 is arranged radially along the support frame 61. The bottom center of each rotating support 64 is hinged to one end of a connecting push rod 63. The other end of the connecting push rod 63 is hinged to a connecting block 66. In addition, the long shaft 55 is a hollow structure. In the specific design, the oil pipe of the hydraulic cylinder 62 can be arranged inside the hollow part of the long shaft 55.

[0028] An elastic column 10 is fixedly provided on the end of the support frame 61 facing the composite pipe 9, and a limit switch 11 is provided inside the elastic column 10. The limit switch 11 is installed on the support frame 61. In addition, the distance between the side pressure plate 56 and the elastic column 10 is equal to the axial length of the composite pipe 9.

[0029] Working principle: First, the pipe fitting is installed and fixed. One end of the outer pipe 91 is placed between the jaws of the three-jaw chuck 2. The three-jaw chuck 2 is activated, causing its jaws to tighten and fixing one end of the outer pipe 91. At the same time, the pipe support mechanism 3 starts working. Multiple support hydraulic cylinders 33 on the outer periphery of the fixing frame 32 are activated, and their extension rods push the arc-shaped clamping plate 34 to move towards the axis of the composite pipe fitting 9 until the inner arc surface of the arc-shaped clamping plate 34 is in close contact with the outer wall of the outer pipe 91, thereby firmly clamping the outer pipe 91 from the middle and ensuring that the outer pipe 91 remains stable during subsequent processing.

[0030] Next, install the middle support tube 93 and the inner tube 92. Place the middle support tube 93 inside the outer tube 91, and then place the inner tube 92 inside the middle support tube 93. If placement is difficult due to high resistance, activate the moving mechanism 4. The drive motor 41 drives the lead screw 42 to rotate, and the nut seat 43 moves along the axis of the lead screw 42 under the action of the lead screw 42. This, in turn, drives the moving seat 44 to move along the slide rail 46 via the slider 45 towards the outer tube 91. The rotating mechanism 5 on the moving seat 44 moves accordingly, and the circular side pressure plate 56 at the end of the long shaft 55 abuts against the ends of the middle support tube 93 and the inner tube 92, pushing them further into the outer tube 91. When the elastic column 10 at the end of the support frame 61 abuts against the three-jaw chuck 2, the limit switch 11 inside the elastic column 10 is triggered, and the moving mechanism 4 stops working. At this time, the ends of the outer tube 91, the middle support tube 93, and the inner tube 92 remain flush.

[0031] Then, the rotating support mechanism 70 is activated, and multiple support hydraulic cylinders 72 on the outer periphery of the fixed frame 71 are activated. Their extended rods push the support rollers 73 to move in the direction of the axis of the long shaft 55 until the support rollers 73 make tight rotational contact with the outer wall of the long shaft 55, forming a stable support for the long shaft 55 and ensuring that the long shaft 55 maintains axial stability during rotation.

[0032] Next, the internal pressure forming operation is performed. The rotating mechanism 5 is activated, and the rotating motor 52 drives the transmission plate 53 to rotate. The transmission plate 53, through the connecting plate 54, drives the long shaft 55 to rotate, which in turn drives the internal pressure forming mechanism 6 to rotate. Simultaneously, the moving mechanism 4 is activated again, causing the rotating mechanism 5 and the internal pressure forming mechanism 6 to slowly move away from the three-jaw chuck 2. During this process, the pushing hydraulic cylinder 62 in the internal pressure forming mechanism 6 is activated, and its extension rod pushes the connecting block 66 to move. The connecting block 66, through the connecting push rod 63, drives the rotating support 64 to move radially outward along the support frame 61. The sliding plates 69 on both sides of the rotating support 64 slide within the sliding sleeve 68, causing the inner pressure roller 65 to expand outward and contact the inner wall of the inner tube 92. During the rotation and movement of the inner pressure roller 65, radial pressure is applied to the inner tube 92, the middle support tube 93, and the outer tube 91, ensuring a tight fit between the three and completing the pressing and forming process.

[0033] When the internal pressure forming mechanism 6 moves to the other end of the composite pipe 9 and completes the pressing and forming of the entire pipe, each mechanism resets in sequence. The extension rod of the hydraulic cylinder 62 is retracted, which drives the internal pressure roller 65 to retract into the support frame 61; the rotary motor 52 stops working and the long shaft 55 stops rotating; the extension rod of the second support hydraulic cylinder 72 is retracted, and the support roller 73 separates from the long shaft 55; the moving mechanism 4 drives the rotating mechanism 5 and the internal pressure forming mechanism 6 back to the initial position; the extension rod of the first support hydraulic cylinder 33 is retracted, and the arc-shaped clamping plate 34 separates from the outer tube 91; the jaws of the three-jaw chuck 2 are released, and the formed composite pipe 9 is removed.

[0034] In the above design, through the synergistic effect of the internal pressure forming mechanism 6, uniform and controllable radial pressure can be applied to the inner tube 92, the middle support tube 93, and the outer tube 91 of the composite pipe fitting 9. During the rotation and movement of the internal pressure roller 65, the titanium alloy inner tube 92, the viscous hose-material middle support tube 93, and the outer pipe material can achieve a tight fit, effectively eliminating interlayer gaps common in traditional processes. The viscous properties of the middle support tube 93 are further enhanced under pressure, strengthening the interlayer connection and fundamentally reducing delamination caused by fluid erosion, temperature changes, or mechanical vibration during long-term use. This significantly extends the service life of the pipe fitting and reduces maintenance costs and safety hazards.

[0035] The tube support mechanism 3 drives the arc-shaped clamping plate 34 through multiple support hydraulic cylinders 33, providing a uniform circumferential clamping force from the outside of the outer tube 91. This ensures that the tube remains axially stable during the forming process and avoids affecting the forming accuracy due to radial offset. The rotating support mechanism 70 provides reliable support for the long shaft 55 through support rollers 73. Combined with the stable transmission of the rotating mechanism 5, it ensures that the rotation axis of the inner pressure forming mechanism 6 always coincides with the tube axis, making the pressure distribution of the inner pressure roller 65 more uniform and further improving the consistency of product forming quality.

[0036] The moving mechanism 4, driven by the lead screw 42 and guided by the slide rail 46, achieves precise axial movement of the internal pressure forming mechanism 6; the rotating mechanism 5, driven by a motor, achieves stable rotation of the internal pressure roller 65. Together, they can complete continuous forming operations across the entire length of the pipe fitting. The coordinated design of the elastic column 10 and the limit switch 11 ensures that the ends of the composite pipe fitting 9 are flush during assembly, reducing manual alignment errors and improving production efficiency.

[0037] By adjusting the extension of the first support hydraulic cylinder 33 and the second support hydraulic cylinder 72, as well as the thrust of the driving hydraulic cylinder 62, the forming requirements of composite pipes 9 with different diameters and lengths can be met. The outward expansion of the inner pressure roller 65 can be precisely controlled by the driving hydraulic cylinder 62, which can meet the bonding requirements of different material combinations (such as titanium alloy inner tubes 92 of different thicknesses and outer tubes).

[0038] The above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, without departing from the spirit and scope defined by the claims of this application.

Claims

1. A lining titanium alloy composite pipe fitting forming machine, comprising a machine body base (1), a pipe fitting end clamping mechanism, a pipe body supporting mechanism (3), a moving mechanism (4), a rotating mechanism (5) and an internal pressure forming mechanism (6), characterized in that, A vertical support frame (8) is fixedly mounted on one end of the base (1). A pipe end clamping mechanism is fixedly installed on the support frame (8). A pipe support mechanism (3) is fixedly mounted in the middle of the base (1). The pipe end clamping mechanism and the pipe support mechanism (3) are used to clamp and fix the composite pipe (9). The composite pipe (9) includes an outer pipe (91), an inner pipe (92), and a middle support pipe (93). The inner pipe (92) is a titanium alloy pipe, and the middle support pipe (93) is an adhesive hose. One end of the outer pipe (91) is fixedly mounted on the pipe end clamping mechanism, and the outer side wall of the outer pipe (91) is fixedly mounted on the pipe support mechanism (3). The inner wall of the outer tube (91) is in close contact with the outer wall of the middle support tube (93), and the inner wall of the middle support tube (93) is in close contact with the outer wall of the inner tube (92). A moving mechanism (4) is provided on the base (1) of the machine body, and a rotating mechanism (5) is installed on the moving mechanism (4). A side pressure member is fixedly provided at one end of the rotating mechanism (5) away from the composite pipe fitting (9), and an internal pressure forming mechanism (6) is provided at one end of the rotating mechanism (5) near the composite pipe fitting (9). The internal pressure forming mechanism (6) can extend into the interior of the inner tube (92) and press the inner tube (92), the middle support tube (93) and the outer tube (91) into shape.

2. The titanium alloy lining composite pipe forming machine according to claim 1, characterized in that, The rotating mechanism (5) includes a mounting plate (51), a rotary motor (52), a transmission plate (53), a connecting plate (54), a long shaft (56), and a side pressure plate (57). The mounting plate (51) is vertically fixed on the moving mechanism (4). The rotary motor (52) is fixedly mounted on the mounting plate (51). The end of the output shaft of the rotary motor (52) is fixedly connected to the center of the transmission plate (53). The transmission plate (53) is fixedly connected to the connecting plate (54) by bolts. The center of the connecting plate (54) is fixedly connected to one end of the long shaft (56). The other end of the long shaft (56) extends toward the composite pipe (9) and is fixedly connected to the internal pressure forming mechanism (6). The axis of the long shaft (56) coincides with the axis of the composite pipe (9). The side pressure member is a circular side pressure plate (57). The center of the side pressure plate (57) is fixedly connected to the end of the long shaft (56) away from the composite pipe (9).

3. The titanium alloy lining composite pipe forming machine according to claim 2, characterized in that, The internal pressure forming mechanism (6) includes a support frame (61), a push hydraulic cylinder (62), a connecting push rod (63), a rotating support (64), and an internal pressure roller (65). The circumferential dimension of the support frame (61) is smaller than the inner diameter of the inner tube (92). One end of the support frame (61) is fixedly connected to the other end of the long shaft (56), and the other end of the support frame (61) faces the composite pipe (9). The push hydraulic cylinder (62) is fixedly installed inside the support frame (61). The extension rod of the push hydraulic cylinder (62) faces the composite pipe (9), and a connecting block (66) is fixedly provided at its end. Multiple outward expansion channels (67) are equidistantly arranged along the circumference of the outer side of the support frame (61). Each outward expansion channel (67) on the support frame (61) corresponds to a certain number of outward expansion channels (67). A rotating support (64) is provided at each position 7), and an inner pressure roller (65) is rotatably mounted on each rotating support (64). A sliding sleeve (68) is fixedly provided on both sides of each outer expansion channel (67), and a sliding plate (69) is fixedly provided on both sides of each rotating support (64) corresponding to the position of the sliding sleeve (68). The shape and size of the sliding plate (69) are adapted to the shape and size of the sliding sleeve (68). The sliding plate (69) is slidably disposed in the sliding sleeve (68), and the sliding direction of the sliding plate (69) is arranged radially along the support frame (61). The bottom center of each rotating support (64) is hinged to one end of a connecting push rod (63), and the other end of the connecting push rod (63) is hinged to the connecting block (66).

4. The titanium alloy lining composite pipe forming machine according to claim 3, characterized in that, The axis of the support frame (61) coincides with the axis of the long axis (56), the push hydraulic cylinder (62) is located on the central axis of the support frame (61) and their axes coincide, and the vertical distance between the axis of each inner pressure roller (65) and the axis of the push hydraulic cylinder (62) is consistent.

5. The titanium alloy lining composite pipe forming machine according to claim 3, characterized in that, An elastic column (10) is fixedly provided on the end of the support frame (61) facing the composite pipe (9), and a limit switch (11) is provided in the elastic column (10), and the limit switch (11) is installed on the support frame (61).

6. The titanium alloy lining composite pipe forming machine according to claim 5, characterized in that, The distance between the side pressure plate (57) and the elastic column (10) is equal to the axial length of the composite pipe (9).

7. The titanium alloy lining composite pipe forming machine according to claim 1, characterized in that, The tube support mechanism (3) includes a base frame (31), a fixed frame (32), a supporting hydraulic cylinder (33), and an arc-shaped clamp (34). The base frame (31) is fixedly mounted on the machine base (1). The fixed frame (32) is fixedly mounted on the top of the base frame (31). The fixed frame (32) is a circumferentially closed structure. Multiple supporting hydraulic cylinders (33) are fixedly mounted at equal intervals along the circumference of the outer periphery of the fixed frame (32). The extension rod of each supporting hydraulic cylinder (33) is oriented toward the axis of the composite tube (9), and an arc-shaped clamp (34) is fixedly mounted at the end of the extension rod of each supporting hydraulic cylinder (33). The inner arc surface of the arc-shaped clamp (34) is in close contact with the outer wall of the outer tube (91).

8. The titanium alloy lining composite pipe forming machine according to claim 2, characterized in that, The moving mechanism (4) includes a drive motor (41), a lead screw (42), a nut seat (43), a moving base (44), a slider (45), and a slide rail (46). The drive motor (41) is fixedly mounted on the machine base (1). The output shaft of the drive motor (41) is fixedly connected to the end of the lead screw (42). The axial direction of the lead screw (42) is parallel to the axial direction of the composite pipe (9). Both ends of the lead screw (42) are mounted on the machine base (1) through support seats. The nut seat (43) is threaded onto the lead screw (42). The top of the female seat (43) is fixedly connected to the bottom of the movable seat (44). Slider (45) is fixedly provided on both sides of the bottom of the movable seat (44). The slider (45) is slidably mounted on the slide rail (46). The slide rail (46) is fixedly mounted on the machine base (1). The axial direction of the slide rail (46) is parallel to the axial direction of the lead screw (42). The mounting plate (51) is fixedly mounted on the top surface of the movable seat (44). A rotating support mechanism (7) is also fixedly mounted on the movable seat (44). The rotating support mechanism (7) is used to support the long shaft (56).

9. The titanium alloy composite pipe forming machine according to claim 8, characterized in that, The rotating support mechanism (7) includes a fixed frame (71), a support hydraulic cylinder (72), and a support roller (73). The fixed frame (71) is fixedly mounted on the movable seat (44). The fixed frame (71) is a circumferentially closed structure. Multiple support hydraulic cylinders (72) are fixedly mounted at equal intervals along the circumference of the outer periphery of the fixed frame (71). The extension rod of each support hydraulic cylinder (72) is oriented towards the axis of the long shaft (56), and a support roller (73) is rotatably mounted at the end of the extension rod of each support hydraulic cylinder (72). The rotation axis of the support roller (73) is parallel to the axis of the long shaft (56). The support roller (73) is in close rotational contact with the outer wall of the long shaft (56), and the support roller (73) is located between the side pressure plate (57) and the connecting plate (54).

10. The titanium alloy composite pipe forming machine according to claim 1, characterized in that, The pipe end clamping mechanism uses a non-rotating three-jaw chuck (2).

Images