A complex profile pipe forming device

Abstract

The present application relates to a kind of complex profile pipe forming device, belong to pipe forming device technical field, solve the consistency of pipe forming device in prior art, process complex and the problem of not being convenient for replacing mould.The complex profile pipe forming device includes frame, upper die, first rolling shaft, lower die, second rolling shaft and drive assembly, upper die is sleeved on first rolling shaft, lower die is sleeved on second rolling shaft, first rolling shaft and second rolling shaft are rotatably connected on frame, drive assembly can drive first rolling shaft and second rolling shaft same frequency rotation respectively, to drive upper die and lower die synchronous motion.Rolled pipe blank before is displaced under the rolling of upper die and lower die, and target product is obtained by rolling of upper and lower die.The present application can continuously and continuously uniform speed to pipe for sustained pressing, reach continuous ordered deformation, solve the consistency of metal pipe existing forming method, process complex and other problems.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe forming device, and particularly relates to a complex profile pipe forming device. BACKGROUND

[0002] Due to the increasingly urgent lightweighting demand of the aerospace industry, the requirements for large-scale, thin-walled and integrated components are increasingly high. Under the condition that the structural stiffness and strength meet the requirements, the thickness of the components is continuously reduced, and the application of large-diameter thin-walled aluminum alloy long pipes in aircraft and spacecraft is continuously expanded.

[0003] With the development of the aerospace industry, the shape of the target pipe is increasingly complex, and when the upper and lower molds are directly pressed as a whole by artificial means, defects such as local instability and wrinkling may occur. At present, the method of local multiple pressing by a press is used for processing, however, the processing efficiency is low, the consistency is poor, and the profile precision is uncontrollable, and how to ensure the high efficiency and high quality of the large-diameter thin-walled pipe is a difficult problem that plagues the manufacturing of such products.

[0004] During the pressing process of the large-diameter curved pipe, the overall mold is pressed down, and due to the instability of the large-diameter pipe and the uneven overall performance of the pipe, instability occurs during the prefabrication process, and the consistency of the required pipe product cannot be controlled. However, the current method of using an oil press to press down one position at a time and then testing the mold not only has low processing efficiency, but also cannot guarantee consistency.

[0005] In addition, due to the complex and diverse profile of the curved pipe, different profiles of the pipe correspond to different molds, and therefore high-frequency mold replacement is required to adapt to the pipe requirements of different profiles, and the mold in the prior art is replaced as a whole, which is time-consuming and laborious. SUMMARY

[0006] In view of the above analysis, the present application aims to provide a complex profile pipe forming device to solve the problems of poor consistency, complex process and inconvenience of mold replacement of the pipe forming device in the prior art.

[0007] The main purpose of the present application is achieved by the following technical solutions:

[0008] A complex profile pipe forming device comprises a rack, an upper mold, a first rolling shaft, a lower mold, a second rolling shaft and a driving assembly. The upper mold is sleeved on the first rolling shaft, the lower mold is sleeved on the second rolling shaft, the first rolling shaft and the second rolling shaft are rotationally connected to the rack, and the driving assembly can drive the first rolling shaft and the second rolling shaft to rotate, thereby driving the upper mold and the lower mold to move synchronously.

[0009] Further, the driving assembly comprises a vertical driving module, a first rotation driving module and a second rotation driving module.

[0010] Further, the vertical driving assembly is used to drive the upper die to move up or down; the first rotary driving module is used to drive the upper die to rotate, and the second rotary driving module is used to drive the lower die to rotate.

[0011] Further, the vertical driving module comprises a bearing support and a driving cylinder, and the driving cylinder is used to drive the bearing support to move.

[0012] Further, the upper end of the driving cylinder is connected with the inner wall of the frame, the lower end is connected with the bearing support, and the bearing support is arranged on the first rolling shaft.

[0013] Further, the first rotary driving module comprises a first driving shaft, a first driving motor and a first rack; the first driving shaft and the first rolling shaft are engaged with the first rack.

[0014] Further, the second rotary driving module comprises a second driving shaft, a second driving motor and a second rack; the second driving shaft and the second rolling shaft are engaged with the second rack.

[0015] Further, a sliding groove is further included; the first driving shaft can reciprocate and slide in the sliding groove.

[0016] Further, an elastic assembly is further included.

[0017] Further, a connecting rod is further included.

[0018] Compared with the prior art, the present application can at least realize one of the following beneficial effects:

[0019] (1) The present application can continuously and continuously press the pipe material by using the rolling die (upper die and lower die) and the rolling press to form a specific profile of the bent pipe material, thereby avoiding the risk of wrinkles, cracks and other risks caused by uneven multiple pressing of the pipe material, achieving continuous and orderly deformation, thereby solving the problems of poor consistency and complex process of the existing forming method (such as multiple mechanical processing) of the metal pipe material, and realizing precise forming of complex pipe parts.

[0020] (2) The pressing part of the rolling die of the present application is a cylindrical structure with an arc-shaped concave surface arranged in the circumferential direction, and the diameter of the cross section increases from the middle to the two ends, so that the die and the pipe material are in line contact, that is, the local loading principle is adopted, the recess structure is continuously and step-by-step processed on the pipe material, the contact area of the large cylinder and the die is reduced, the flow ability perpendicular to the pipe pressing direction is improved, the pipe material is more easily flowed horizontally, and a certain profile of the pipe material is gradually prepared by using smaller load, the tonnage requirement of the equipment is lower, the cost is reduced, and the energy consumption is saved.

[0021] (3) The upper die and the lower die of the application can be partially or wholly disassembled, and the replacement of the die can be quickly realized. For the deformation of pipe with different specifications and different profiles, only one or more pressure blocks need to be replaced, thereby improving the production efficiency. In addition, for the damage of the die in different areas, only the damaged pressure block needs to be replaced, thereby effectively reducing the production cost of the die.

[0022] (4) The pressure block of the upper and lower die of the application comprises a guide column and a guide groove, the guide column is arranged on one side of the contact surface of the pressure block, and the guide groove is arranged on the other side of the contact surface. During the installation or disassembly of the pressure block, the guide column of the pressure block can be embedded in the guide groove of the adjacent pressure block, thereby guiding the installation of the pressure block and avoiding the deviation of the pressure block during the installation process, so that the change of the rolling profile is avoided. At the same time, after the installation is completed, the adjacent two pressure blocks can be limited through the clamping between the guide column and the guide groove, thereby avoiding the dislocation of the pressure block during the rolling process.

[0023] The above technical solutions can be combined with each other in the application to realize more preferred combination schemes. Other features and advantages of the application will be described in the subsequent specification, and some advantages will become apparent from the specification, or will be understood by implementing the application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the application and are incorporated herein and constitute a part of the application. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application. In the drawings:

[0025] Figure 1 FIG. 1 is a structural schematic view of one embodiment of the complex profile pipe forming device of the application;

[0026] Figure 2 FIG. 2 is a front view of one embodiment of the complex profile pipe forming device of the application;

[0027] Figure 3 FIG. 3 is a side view of one embodiment of the complex profile pipe forming device of the application;

[0028] Figure 4 FIG. 4 is a forming process diagram of one embodiment of the complex profile pipe forming device of the application;

[0029] Figure 5 FIG. 5 is a structural schematic view of another embodiment of the complex profile pipe forming device of the application; Figure 1 FIG. 6 is a detail enlarged view of B in the application;

[0030] Figure 6 FIG. 7 is a structural schematic view of another embodiment of the complex profile pipe forming device of the application;

[0031] Figure 7The side view of the upper die and the lower die of the complex profile pipe forming device of the present application;

[0032] Figure 8 The front view of the upper die and the lower die of the complex profile pipe forming device of the present application;

[0033] Figure 9 The upper die and the lower die of the complex profile pipe forming device of the present application Figure 7 The A-A plane cross-sectional view of the present application;

[0034] Figure 10 The structural schematic diagram of the upper die / lower die of the complex profile pipe forming device of the present application;

[0035] Figure 11 The exploded view of the upper die / lower die of the complex profile pipe forming device of the present application;

[0036] Figure 12 The structural schematic diagram of the pressure block of the complex profile pipe forming device of the present application.

[0037] Reference signs:

[0038] 1 - upper die; 101 - die pressing part; 102 - die edge part; 103 - protruding part; 104 - hub; 105 - support column; 1051 - limiting boss; 106 - pressure block; 1061 - guide column; 1062 - guide groove; 1063 - connecting part; 107 - fastener;

[0039] 2 - lower die; 3 - pipe blank before rolling; 4 - pipe blank after rolling; 5 - rack; 6 - bearing support seat; 7 - driving cylinder; 8 - first rolling shaft; 9 - second rolling shaft;

[0040] 10 - first driving shaft; 11 - second driving shaft; 111 - sliding groove; 112 - elastic assembly; 1121 - first fixing part; 1122 - second fixing part; 1123 - elastic part; 113 - connecting rod; 12 - first rack; 13 - second rack. DETAILED DESCRIPTION

[0041] The complex profile pipe forming device is further described in detail in combination with specific embodiments below, which are only used for comparison and explanation purposes, and the present application is not limited to these embodiments.

[0042] Embodiment 1

[0043] A specific embodiment of the present application, for example, Figures 1-3As shown, a complex profile pipe forming device is disclosed, which comprises a rack 5, an upper die 1, a first rolling shaft 8, a lower die 2, a second rolling shaft 9 and a driving assembly arranged in the rack 5, the upper die 1 is sleeved on the first rolling shaft 8, the lower die 2 is sleeved on the second rolling shaft 9, the first rolling shaft 8 and the second rolling shaft 9 are rotationally connected to the rack 5, and the driving assembly can drive the first rolling shaft 8 and the second rolling shaft 9 to rotate in opposite directions at the same frequency, thereby driving the upper die 1 and the lower die 2 to move synchronously.

[0044] In implementation, as shown, Figure 4 Before rolling, the pipe blank 3 extends between the upper die 1 and the lower die 2, the upper die 1 and the lower die 2 move in opposite directions at the same frequency, and under the rolling of the upper and lower dies, the pipe blank 3 before rolling moves forward and passes through the rolling of the upper and lower dies, thereby obtaining the pipe blank 4 after rolling (i.e. the target product).

[0045] The driving assembly comprises a vertical driving module, a first rotation driving module and a second rotation driving module. The vertical driving assembly is used to drive the upper die 1 to move upward or downward in the vertical direction, the first rotation driving module is used to drive the upper die 1 to rotate around its own axis, and the second rotation driving module is used to drive the lower die 2 to rotate around its own axis.

[0046] As shown, Figure 3 The vertical driving module comprises a bearing support 6 and a driving cylinder 7, the upper end of the driving cylinder 7 is fixedly connected to the inner wall of the rack 5, the lower end is connected to the bearing support 6, and the bearing support 6 is arranged on the first rolling shaft 8.

[0047] Under the driving of the driving cylinder 7, the bearing support 6 can drive the upper die 1 to move upward or downward synchronously through the first rolling shaft 8, so that the upper die 1 can move away from or close to the lower die 2, and the pipe blank 3 before rolling can extend into or exit from between the upper die 1 and the lower die 2.

[0048] Further, the first rotation driving module comprises a first driving shaft 10, a first driving motor and a first rack 12, the first rack 12 is meshingly connected to the first driving shaft 10 and the first rolling shaft 8. The first driving shaft 10 can rotate through the first driving motor, thereby driving the first rolling shaft 8 to rotate synchronously in the same direction through the first rack 12, so that the upper die 1 on the first rolling shaft 8 rotates together.

[0049] Further, the second rotation driving module comprises a second driving shaft 11, a second driving motor and a second rack 13, the second rack 13 is meshingly connected to the second driving shaft 11 and the second rolling shaft 9. The second driving shaft 11 can rotate through the second driving motor, thereby driving the second rolling shaft 9 to rotate synchronously in the same direction through the second rack 13, so that the lower die 2 on the second rolling shaft 9 rotates together.

[0050] In order to enable the pipe blank 3 to be driven to move forward by the movement of the upper die 1 and the lower die 2 and to be rolled.

[0051] When the first driving shaft 10 and the second driving shaft 11 rotate in opposite directions and at the same frequency and speed.

[0052] When the vertical driving module drives the first rolling shaft 8 to move upward, the first rack 12 drives the first driving shaft 10 to move upward synchronously, in order to ensure that the first rack 12 does not break, the rack 5 is further provided with a sliding groove 111, when the first driving shaft 10 is driven by the first rack 12 to move synchronously, the first driving shaft 10 can be limited to slide along the sliding groove 111.

[0053] In order to ensure that the first rack 12 is always in a tension state, as shown in the figure, Figure 5 The device further comprises an elastic assembly 112 arranged below the sliding groove 111; the elastic assembly 112 comprises a first fixing part 1121, a second fixing part 1122 and an elastic part 1123.

[0054] The first fixing part 1121 is fixedly connected to the first driving shaft 10, the second fixing part 1122 is fixedly connected to the rack 5, one end of the elastic part 1123 is connected to the first fixing part 1121, and the other end is connected to the second fixing part 1122, and the elastic part 1123 is always in a tension state, so that the first fixing part 1121 on the first driving shaft 10 can be always in a downward tension state, to ensure the tension of the first rack 12, and at the same time ensure that the first driving shaft 10 can restore its original position through the elastic tension of the elastic part 1123.

[0055] Another embodiment of the application, as shown in the figure, Figure 6 It can further comprise a connecting rod 113.

[0056] One end of the connecting rod 113 is rotatably connected to the first rolling shaft 8, and the other end is rotatably connected to the first driving shaft 10. The first rolling shaft 8 and the first driving shaft 10 are connected through the connecting rod 113, so that the distance between them is fixed, and at the same time the inclination angle of the connecting rod 113 is limited through the sliding groove 111, so that when the first rolling shaft 8 moves upward, the first driving shaft 10 moves upward synchronously without angle deflection.

[0057] The upper die 1 and the lower die 2 of the embodiment are the same, as shown in the figure, Figures 7-8 Both comprise a die pressing part 101 and a die edge part 102.

[0058] The pressing part 101 is a cylindrical structure with an arc-shaped inner concave surface arranged in the circumferential direction, and the diameter of the cross section thereof increases from the middle to the two ends.

[0059] When the upper die 1 and the lower die 2 are in contact, only the edge parts 102 of the upper die 1 and the lower die 2 are in contact with each other, and the longitudinal sections of the two form an elliptical forming space for placing and forming the pipe blank 3 before rolling.

[0060] It is worth noting that the pressing part 101 of the upper die 1 is a cylindrical structure with an arc-shaped inner concave surface arranged in the circumferential direction, and the diameter of the cross section thereof increases from the middle to the two ends, so that the upper die 1 and the lower die 2 are in linear contact with the pipe blank 3 before rolling, that is, the local loading principle is adopted, and the recess structure is processed on the pipe blank in continuous steps, which reduces the contact area between the large cylinder and the die, improves the flow ability perpendicular to the pipe pressing direction, and makes the pipe more easily flow horizontally, that is, a certain profile pipe is gradually prepared using a smaller load, the tonnage requirement of the equipment is lower, the cost is reduced, and the energy consumption is saved.

[0061] Further, as shown in Figure 9 The arc-shaped inner concave surface of the pressing part 101 is provided with a protruding part 103, the protruding part 103 includes a plurality of protrusions, and the protruding part 103 is provided with corresponding protrusions according to the requirements of the target product. The shape and size of the protrusion are related to the pressing depth of the target part, the distance from the arc-shaped inner concave surface to the center of the rotating shaft is determined according to the pressing position and depth of the pipe blank, and appropriate compensation is given according to the springback caused by the elastic strain of the material.

[0062] Compared with the prior art, the present application can continuously and continuously press the pipe by rolling the upper die 1 and the lower die 2 to roll and press the pipe with a specific profile, thereby avoiding the uneven multiple pressing of the pipe in the traditional forming method, which causes wrinkles, cracks and other risks caused by the interference between different protrusions, achieving continuous and orderly deformation, thereby solving the problems of poor consistency and complex process of the existing forming method of such metal pipes (such as multiple mechanical processing), and realizing precise forming of complex pipe parts.

[0063] Example 2

[0064] Another specific embodiment of the present application discloses a complex profile pipe forming device, specifically a complex profile pipe forming device with a locally detachable die.

[0065] Specifically, as shown in Figures 10-11As shown, the upper mold 1 and the lower mold 2 have the same structure, and both include a hub 104, a support column 105, a pressure block 106, and a fastener 107. The support column 105 is provided with a plurality of support columns 105, one end of the plurality of support columns 105 is evenly fixed to the outer side wall of the hub 104 in a divergent manner, and the other end is detachably connected with the pressure block 106 through the fastener 107.

[0066] Among them, the plurality of pressure blocks 106 can form the upper mold in embodiment 1, that is, the pressure block 106 is a fan-shaped three-dimensional structure, and the outer side is provided with an arc-shaped concave surface, the diameter of the cross section increases from the middle to the two ends once, and the arc-shaped concave surface of the pressure block 106 is also provided with a protruding part 103, the protruding part 103 includes a plurality of protrusions, and the protruding part 103 is provided with corresponding protrusions according to the demand of the target product.

[0067] Therefore, the pressure block 106 of the upper mold 1 and the lower mold 2 can be detached together, so as to quickly realize the replacement of the mold. For different specifications and different profile requirements of pipe deformation, only one or more pressure blocks 106 need to be replaced (that is, the corresponding protruding part 103 on the outer side of the pressure block 106 is replaced), so as to improve the production efficiency.

[0068] In addition, only the corresponding damaged pressure block 106 needs to be replaced when a part of the upper mold 1 and the lower mold 2 is damaged, so as to effectively reduce the production cost of the mold, and save manpower and material resources.

[0069] As shown, Figure 12 The pressure block 106 includes a guide column 1061 and a guide groove 1062. The guide column 1061 is arranged on one side of the contact surface of the pressure block 106, and the guide groove 1062 is arranged on the other side of the contact surface of the pressure block 106.

[0070] During the installation or disassembly of the pressure block 106, the guide column 1061 of the pressure block 106 can be embedded in the guide groove 1062 of the adjacent pressure block 106, so that the guide column 1061 and the guide groove 1062 are in sliding connection, thereby guiding the installation of the pressure block 106 through the guide column 1061 and the guide groove 1062, and avoiding the deviation of the pressure block 106 during the installation process to cause the change of the rolling profile.

[0071] In addition, after the installation is completed, the adjacent two pressure blocks 106 can be limited through the clamping between the guide column 1061 and the guide groove 1062, so as to avoid the dislocation of the pressure block 106 during the rolling process.

[0072] Further, the pressure block 106 further includes a connecting part 1063, and the connecting part 1063 is detachably connected with the support column 105.

[0073] Specifically, the connecting part 1063 and the connecting part of the support column 105 are provided with corresponding through holes, when the pressure block 106 is installed, the connecting part 1063 is inserted into the connecting end of the support column 105, and the fastener 107 is inserted into the through holes of the connecting part 1063 and the support column 105 at the same time, so as to fasten the connecting part 1063 and the support column 105.

[0074] It is worth noting that in order to ensure that the distance between the connecting part 1063 of each pressure block 106 and the connecting end of the support column 105 remains consistent during the installation of the pressure block 106, the support column 105 includes a limiting boss 1051, so that when the connecting part 1063 is inserted into the support column 105, it can be limited by the limiting boss 1051, thereby ensuring that the relative position between the pressure block 106 and the support column 105 remains consistent, and at the same time, it is convenient for the workers to work and improves the work efficiency.

[0075] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A complex profile pipe forming apparatus for a complex profile pipe which is a large-diameter thin-walled pipe, characterized by, The device comprises a rack (5), an upper die (1), a first rolling shaft (8), a lower die (2), a second rolling shaft (9) and a driving assembly. The upper die (1) is sleeved on the first rolling shaft (8), the lower die (2) is sleeved on the second rolling shaft (9), the first rolling shaft (8) and the second rolling shaft (9) are rotationally connected to the rack (5), and the driving assembly can drive the first rolling shaft (8) and the second rolling shaft (9) to rotate, thereby driving the upper die (1) and the lower die (2) to move synchronously. The upper die (1) and the lower die (2) have the same structure and comprise a hub (104), a support column (105), a pressure receiving block (106) and a fastener (107). The support column (105) is provided with a plurality of support columns (105), one end of the plurality of support columns (105) is evenly fixed to the outer side wall of the hub (104) in a divergent manner, and the other end is detachably connected to the pressure receiving block (106) through the fastener (107).

2. The complex profile pipe forming apparatus of claim 1, wherein, The pressure receiving block (106) has a fan-shaped three-dimensional structure and is provided with an arc-shaped concave surface on the outer side, and the arc-shaped concave surface of the pressure receiving block (106) is provided with a protruding portion (103).

3. The complex profile pipe forming apparatus of claim 2, wherein The protruding portion (103) comprises a plurality of protrusions, and the protrusions are arranged according to the requirements of the target product.

4. The apparatus of claim 3, wherein, The pressure receiving block (106) of the upper die (1) and the lower die (2) can be detached together.

5. The complex profile pipe forming apparatus of claim 4, wherein The driving assembly comprises a vertical driving module, a first rotation driving module and a second rotation driving module.

6. A complex profile tube forming apparatus according to any one of claims 2-5, wherein The vertical driving module is used for driving the upper die (1) to move upwards or downwards, the first rotation driving module is used for driving the upper die (1) to rotate, and the second rotation driving module is used for driving the lower die (2) to rotate.

7. The apparatus of any of claims 2-5, wherein, The vertical driving module comprises a bearing support (6) and a driving cylinder (7), and the driving cylinder (7) is used for driving the bearing support (6) to move.

8. The complex profile pipe forming apparatus of claim 6 wherein, The upper end of the driving cylinder (7) is connected to the inner wall of the rack (5), the lower end is connected to the bearing support (6), and the bearing support (6) is arranged on the first rolling shaft (8).

9. The complex profile pipe forming apparatus of claim 8, wherein The first rotation driving module comprises a first driving shaft (10), a first driving motor and a first rack (12), the first driving shaft (10) and the first rolling shaft (8) are engaged with the first rack (12).

10. The complex profile pipe forming apparatus of claim 8 wherein, The second rotation driving module comprises a second driving shaft (11), a second driving motor and a second rack (13), the second driving shaft (11) and the second rolling shaft (9) are engaged with the second rack (13). The device further comprises a sliding groove (111), and the first driving shaft (10) can reciprocate in the sliding groove (111). The device further comprises an elastic assembly (112). The device further comprises a connecting rod (113).

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