Internal high-pressure forming die for special-shaped three-way guide pipe of airplane
Through the internal high-pressure forming mold and push head structure, the problems of poor welding deformation and reliability in traditional tee pipe manufacturing are solved, and high-precision, low resistance and lightweight tee pipe forming is achieved.
Patent Information
- Application Number
- CN202421774201.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-07-25
AI Technical Summary
In the traditional tee pipe manufacturing method, there are problems such as high scrap rate, poor reliability, unsmooth inner surface, large fluid resistance and weight gain of parts.
The internal high-pressure forming mold is adopted to achieve the overall forming of the tee pipe through the upper and lower molds and pusher structures. The liquid medium increases the pressure in the pipe and causes plastic deformation of the pipe, and the wall thickness is prevented from being thinned and broken through the reverse pusher.
The high-precision forming of the tee pipe is achieved, smooth inner surface, small fluid resistance, and lightweight parts, avoiding welding deformation and cracking problems.
Smart Images
Figure CN222307029U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of molds, and particularly relates to an internal high pressure forming mold for an aircraft special-shaped three-way conduit. Background Art
[0002] Tee pipes play a very important role in complex pipeline connections and are widely used in aerospace, automotive pipelines, oil and gas transportation, etc. Figure 1 As shown, the traditional method of manufacturing tee pipes is mainly welding, which is to form a tee half pipe by stamping, and then weld the two tee half pipes together to form an integral tee pipe. However, the tee pipes manufactured by welding have the following main disadvantages:
[0003] 1. The scrap rate increases due to welding deformation;
[0004] Second, poor reliability due to the presence of welds and residual stress;
[0005] 3. The inner surface is not smooth and the fluid resistance is large;
[0006] 4. The overall mass of the parts increases due to the presence of welds. Summary of the invention
[0007] The utility model aims at the defects of the prior art and provides a high pressure forming die for an aircraft special-shaped three-way conduit.
[0008] To achieve the above purpose, the utility model adopts the following technical scheme, including an upper mold and a lower mold, both of which have the same structure, and their surfaces are provided with a through groove channel 1 and a groove channel 2 perpendicular thereto, and groove channel 1 is connected to groove channel 2.
[0009] When the upper and lower molds are closed, the two groove channels 1 form a first accommodating cavity for accommodating the straight tube to be processed, and the two groove channels 2 form a second accommodating cavity for accommodating the reverse thrust head.
[0010] The straight tube to be processed is placed in the first of the two groove channels after the mold is closed, and the tube body passes through the second groove channel and fits the shape of the first accommodating cavity.
[0011] Furthermore, the mold also includes: a left pusher head and a right pusher head, each pusher head includes a cylindrical portion and a round cake-shaped end portion, wherein the cylindrical portion of at least one pusher head is provided with a liquid outlet, and the end portion is provided with a liquid inlet, and the two are connected by a channel; when in use, the cylindrical portion of the left pusher head extends into the first accommodating cavity from one end and abuts against one end of the straight tube, and the cylindrical portion of the right pusher head extends into the first accommodating cavity from the other end and abuts against the other end of the straight tube.
[0012] Furthermore, the diameter of the round pancake-shaped end portions of the left and right push heads is larger than the diameter of the cylindrical portion, so as to achieve sealing.
[0013] Furthermore, the mold also includes a reverse push head, which includes a columnar body and a round pancake-shaped end portion, and is located in the second accommodating cavity when in use, and the end portion fits with both sides of the second accommodating cavity. Through the control of the hydraulic cylinder, a reaction force is applied to the tee to prevent the wall thickness from being severely reduced and cracked during the forming process.
[0014] Furthermore, sealing rubber rings are provided on the top of the left pusher head and the right pusher head, which are tightly fitted with the pipe walls at both ends of the straight pipe to form a sealed space. The liquid medium enters the right pusher head through the inlet, is discharged from the outlet, and enters the straight pipe, causing the internal pressure of the straight pipe to increase, causing plastic deformation, and forming a three-way pipe that meets the process size.
[0015] Compared with the prior art, the utility model has beneficial effects.
[0016] The utility model realizes the integral forming of the three-way pipe through the mold, and adds a reverse push head in the mold, which effectively prevents the problem of the top of the three-way pipe being easily broken during the forming. Compared with the traditional welded three-way pipe, the integrally formed three-way pipe has the following advantages:
[0017] ①Since there is no welding deformation, the dimensional accuracy of the parts is high.
[0018] ② The internal transition is smooth, there is no weld, and the fluid resistance is small.
[0019] ③There are no welds, which is beneficial to reducing the weight of parts. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. The protection scope of the utility model is not limited to the following descriptions.
[0021] Figure 1 It is a schematic diagram of a welded three-way pipe in the prior art.
[0022] Figure 2 Schematic diagram of the structure of the high pressure forming three-way pipe mold in the embodiment Figure 1 .
[0023] Figure 3 yes Figure 2 Schematic diagram of the push head structure in the middle right.
[0024] Figure 4 Schematic diagram of the structure of the high pressure forming three-way pipe mold in the embodiment Figure 2 .
[0025] Figure 5 It is a schematic diagram of the structure of the three-way pipe after forming.
[0026] In the figure, 1 is a lower mold, 2 is a left push head, 3 is a right push head, 4 is a reverse push head, 5 is a straight pipe, 6 is a sealing rubber ring, 7 is an upper mold, 8 is a liquid inlet, 9 is a liquid outlet, and 10 is a three-way pipe after forming. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and beneficial effects of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments.
[0028] Embodiment 1, as Figure 1-5 As shown, the internal high pressure forming three-way pipe mold includes an upper mold and a lower mold, and the upper mold 7 has the same structure as the lower mold 1, and a through groove channel 1 is opened on the surface of both molds, and a groove channel 2 perpendicular to the groove channel 1 is also opened on the mold surface; and the groove channel 1 is connected to the groove channel 2.
[0029] When in use, the upper and lower molds 1 are molded together, and the two groove channels 1 form a first accommodating cavity for accommodating the straight tube 5 to be processed; the two groove channels 2 form a second accommodating cavity for accommodating the reverse thrust head 4; the straight tube 5 to be processed is placed in the two groove channels 1 after the molds are closed, and the placement position of the straight tube 5 to be processed satisfies its tube body passing through the groove channel 2; and the straight tube 5 to be processed fits the shape of the first accommodating cavity.
[0030] The three-way pipe mold also includes a left push head 2, a right push head 3, and a reverse push head 4; wherein, the left and right push heads both include a cylindrical portion and a round cake-shaped end portion at one end of the cylindrical portion; and one of the left and right push heads has a cylinder provided with a liquid outlet 9, and an end portion provided with a liquid inlet 8, and the liquid inlet 8 and the liquid outlet 9 are connected by a channel; and when in use, the cylindrical portion of the left push head 2 extends from one end of the first accommodating cavity until it abuts against one end of the straight tube 5; the cylindrical portion of the right push head 3 extends from the other end of the first accommodating cavity until it abuts against the other end of the straight tube 5; and the diameter of the round cake-shaped end portions of the left and right push heads is greater than the diameter of the cylindrical portion.
[0031] A sealing rubber ring 6 is provided on the top of the left push head 2 and the right push head 3 , which is tightly fitted with the two ends of the straight tube 5 , so that a sealed space is formed inside the left and right push heads 3 and the straight tube 5 .
[0032] The reverse thrust head 4 also includes a columnar portion and a round pancake-shaped end portion at one end of the columnar portion; when the reverse thrust head 4 is located in the second accommodating cavity, the end portion and both sides thereof fit in with the second accommodating cavity.
[0033] Specifically, the internal high pressure forming three-way pipe mold, the entire device is composed of upper and lower molds 1, left and right push heads 3, reverse push head 4, and pipes.
[0034] The tops of the left and right push heads 3 are made of rubber material to seal the liquid.
[0035] The rear part of the right push head 3 is provided with a connecting hole for connecting a liquid filling pipeline.
[0036] A liquid outlet 9 is provided at the front of the right push head 3 for filling the pipe with liquid.
[0037] The utility model adopts an internal high pressure forming method, by filling liquid medium into the interior of the metal pipe to generate high pressure, and the left and right push heads 3 are used to seal the two ends of the pipe. As the left and right push heads 3 move forward and the internal pressure increases, the metal pipe will undergo plastic deformation and finally fit with the inner wall of the mold cavity to obtain a part with a shape and precision that meets the requirements.
[0038] Example 2, use process:
[0039] When in use, the straight tube 5 is placed in the mold, and the upper mold 7 and the lower mold 1 are closed.
[0040] The left push head 2 and the right push head 3 are controlled by the hydraulic cylinder to move forward and reach the two ends of the straight pipe 5. The left push head 2 and the right push head 3 have sealing rubber on the top, which fits tightly with the two ends of the straight pipe 5, so that a sealed space is formed inside the left and right push heads 3 and the straight pipe 5. At the same time, the reverse push head 4 is controlled by the hydraulic cylinder to set a suitable force to apply a reaction force to the tee, so as to prevent the tee from being broken due to severe wall thickness reduction during forming.
[0041] After the forming starts, the liquid medium enters the right pusher head 3 through the liquid inlet 8, is discharged from the liquid outlet 9, and enters the straight tube 5. As the pressure of the liquid medium gradually increases, the internal pressure of the straight tube 5 increases, and the straight tube 5 begins to undergo plastic deformation. In order to prevent the wall thickness from thinning and rupture, the left pusher head 2 and the right pusher head 3 also need to move forward a proper distance. At this time, the three-way pusher head 4 retreats until a three-way tube that meets the process size is formed.
[0042] 1. The utility model uses a method of internal high pressure forming to realize the preparation of an integrally formed three-way pipe through a special mold;
[0043] 2. The utility model adds a reverse thrust head 4 in the mold, which effectively prevents the problem of top cracking during the forming of the three-way pipe.
[0044] Introduction to the functions and features of each component of this utility model:
[0045] 1. The lower mold 1 cooperates with the upper mold 7 to form a closed mold.
[0046] 2. The left push head 2 has a sealing rubber ring 6, which is used to closely contact with one end of the straight tube 5 and form a seal.
[0047] 3. The right push head 3 also has a sealing rubber ring 6, which is in close contact with the other end of the straight tube 5 to form a seal. The rear part of the right push head 3 is provided with a connecting hole to connect to the liquid filling pipeline, and the front part is provided with a liquid outlet 9.
[0048] 4. The reverse thrust head 4 is used to apply a reaction force during the tee forming process to prevent the wall thickness from being reduced and causing rupture.
[0049] Among them, when the straight tube 5 is placed in the mold, the left push head 2 and the right push head 3 move forward to the two ends of the straight tube 5 to form a sealed space, and the liquid medium enters through the liquid inlet 8 and is discharged through the liquid outlet 9, so that the internal pressure of the straight tube 5 increases and plastic deformation occurs to form a three-way pipe.
[0050] 5. The left push head 2 and the right push head 3 are controlled by hydraulic cylinders to accurately control their forward distance to ensure the forming quality of the tee pipe.
[0051] 6. The reverse thrust head 4 is also controlled by a hydraulic cylinder and is used to apply a reaction force to the tee pipe according to a set force to prevent severe wall thickness reduction and rupture during the forming process.
[0052] 7. The pressure of the liquid medium is gradually increased until it reaches a preset value to ensure uniform plastic deformation of the straight tube 5 and form a three-way tube that meets the process dimensions.
[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. Therefore, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope defined by the claims of the present invention.
Claims
1. An aircraft special-shaped three-way conduit internal high pressure forming die, characterized in that: include: The upper mold and the lower mold have the same structure, and the surfaces of both molds are provided with a through groove channel 1 and a groove channel 2 perpendicular thereto, and the groove channel 1 is connected to the groove channel 2; When the upper and lower molds are closed, the two groove channels 1 form a first accommodating cavity for accommodating the straight tube to be processed, and the two groove channels 2 form a second accommodating cavity for accommodating the reverse thrust head; The straight tube to be processed is placed in the first of the two groove channels after the mold is closed, and the tube body passes through the second groove channel and fits the shape of the first accommodating cavity.
2. The high pressure forming die for aircraft special-shaped three-way conduit according to claim 1, characterized in that: Also includes: The left pusher head and the right pusher head, each pusher head includes a cylindrical portion and a round cake-shaped end portion, wherein the cylindrical portion of at least one pusher head is provided with a liquid outlet, and the end portion is provided with a liquid inlet, and the liquid outlet and the liquid inlet are connected through a channel; when in use, the cylindrical portion of the left pusher head extends into the first accommodating cavity from one end and abuts against one end of the straight tube, and the cylindrical portion of the right pusher head extends into the first accommodating cavity from the other end and abuts against the other end of the straight tube.
3. The high pressure forming die for aircraft special-shaped three-way conduit according to claim 1, characterized in that: The diameter of the round pancake-shaped end portions of the left and right push heads is larger than the diameter of the column portion.
4. The high pressure forming die for aircraft special-shaped three-way conduit according to claim 1, characterized in that: It also includes a reverse thrust head, which includes a cylindrical portion and a round pancake-shaped end portion. When in use, it is located in the second accommodating cavity, and its end portion fits with both sides of the second accommodating cavity.
5. The high pressure forming die for aircraft special-shaped three-way conduit according to claim 1, characterized in that: Sealing rubber rings are provided on the tops of the left push head and the right push head, which fit tightly with the pipe walls at both ends of the straight pipe to form a sealed space.