Bending device and method for thin-wall aviation bent pipe fitting production

Abstract

The invention belongs to the technical field of aviation accessory production, and particularly relates to a bending device and method for thin-wall aviation bent pipe fitting production. The device is reasonable in structural design and is mainly composed of the mounting base, the arc-shaped pressure-bearing block, the clamping assembly, the bending assembly, the inner supporting spring conveying assembly and the spring type electric heater, all the parts cooperate with one another, and the thin-wall pipe fitting is clamped through the clamping assembly; the inner supporting spring conveying assembly is used for conveying the inner supporting spring into the thin-wall pipe fitting or taking the inner supporting spring out of the thin-wall pipe fitting, the bending assembly can be used for driving the thin-wall pipe fitting to be bent towards the arc-shaped pressure-bearing block, and then the thin-wall aviation bent pipe fitting with the needed radian is formed. In this way, inner supporting can be provided in the bending process of the thin-wall aviation bent pipe fitting, and the deformation problems of collapse and the like in the bending process of the thin-wall aviation bent pipe fitting are avoided; and meanwhile, the thin-wall aviation bent pipe fitting can be heated before bending and in the bending process, the plasticity of the thin-wall aviation bent pipe fitting can be improved, and the risk of fracture of the thin-wall aviation bent pipe fitting is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of aviation accessory production, and particularly relates to a bending device and method for producing thin-walled aviation bent pipe fittings. Background Art

[0002] The bending device plays a crucial role in the production of thin-walled aviation bent pipe fittings, mainly reflected in the following aspects: 1) The production of thin-walled aviation bent pipe fittings has extremely high requirements for precision and efficiency. Traditional pipe bending processes often have problems such as low production efficiency and unstable finished product quality. Modern bending devices, especially numerical control bending machines, can quickly and accurately complete the bending task through automatic programming and adjustment of process parameters, greatly improving production efficiency. 2) The aviation and aerospace industries have extremely strict requirements for the precision and quality of parts. Due to the hollow structure inside the thin-walled bent pipe fittings, forming defects such as inner wrinkling, outer thinning, and cross-sectional distortion are likely to occur during the bending process. Advanced bending devices can significantly reduce the occurrence of human errors through the use of high-precision bending processes and automatic control, ensuring the precision and consistency of each part. 3) The production of thin-walled bent pipe fittings has high requirements for material utilization. Traditional pipe bending processes often cause waste and loss of materials during the bending process. Advanced bending devices can reduce material waste through precise control of bending angles and forces, improving production efficiency and resource utilization. This is of great significance for reducing production costs and improving economic benefits.

[0003] Deficiencies were found in the traditional bending device for producing thin-walled aviation bent pipe fittings during use. One is that it cannot provide internal support during the bending process of thin-walled aviation bent pipe fittings, resulting in deformation problems such as collapse during the bending process; the other is that it cannot heat the thin-walled aviation bent pipe fittings before and during bending. Heating is beneficial to increasing the plasticity of the thin-walled aviation bent pipe fittings and reducing the risk of their rupture. Therefore, it is necessary to optimize and improve the traditional bending device for producing thin-walled aviation bent pipe fittings. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above problems existing in the traditional technology and provide a bending device and method for producing thin-walled aviation bent pipe fittings.

[0005] To achieve the above technical objectives and reach the above technical effects, the present invention is realized through the following technical solutions:

[0006] The present invention provides a bending device for manufacturing thin-walled aviation bent pipe fittings, which includes an installation base, an arc-shaped pressure-bearing block, a clamping assembly, a bending assembly, an inner support spring conveying assembly, and a spring-type electric heater. The spring-type electric heater includes an inner support spring and a connector provided at its tail end. The arc-shaped pressure-bearing block is installed on the installation base. On one side of the arc-shaped pressure-bearing block on the installation base, there is a clamping assembly for clamping thin-walled pipe fittings and an inner support spring conveying assembly for conveying the inner support spring into the thin-walled pipe fittings. On the other side of the arc-shaped pressure-bearing block on the installation base, there is a bending assembly for driving the thin-walled pipe fittings to bend towards the arc-shaped pressure-bearing block.

[0007] Further, in the above-mentioned bending device for manufacturing thin-walled aviation bent pipe fittings, an open arc-shaped groove is formed in the arc-shaped pressure-bearing block to facilitate the clamping of the thin-walled pipe fittings.

[0008] Further, in the above-mentioned bending device for manufacturing thin-walled aviation bent pipe fittings, the clamping assembly includes a slide rail, a slider, a first mounting seat, a first sliding ring, and a first hydraulic expansion sleeve. The slide rail is fixed on the installation base, and a slider forming a linear guide pair with it is installed on the slide rail. A first mounting seat is fixed on the upper side of the slider. A first sliding ring is movably restricted in the first mounting seat, and a first hydraulic expansion sleeve for clamping the thin-walled pipe fittings is installed in the first sliding ring.

[0009] Further, in the above-mentioned bending device for manufacturing thin-walled aviation bent pipe fittings, the bending assembly includes a positioning ring sleeve, a positioning shaft, a lever, a connecting shaft, a turntable, a second mounting seat, a second sliding ring, and a second hydraulic expansion sleeve. The positioning ring sleeve is fixed on the installation base. One end of the lever is fixed with a positioning shaft movably restricted in the positioning ring sleeve. The positioning shaft is movably restricted on the lever. A second mounting seat is fixed on the outside of the positioning shaft through the turntable. A second sliding ring is movably restricted in the second mounting seat, and a second hydraulic expansion sleeve for clamping the thin-walled pipe fittings is installed in the second sliding ring.

[0010] Further, in the above-mentioned bending device for manufacturing thin-walled aviation bent pipe fittings, an arc-shaped movable groove is formed on the installation base to facilitate the avoidance of the positioning shaft.

[0011] Further, in the above-mentioned bending device for manufacturing thin-walled aviation bent pipe fittings, the outer diameter of the inner support spring in the spring-type electric heater is matched with the inner diameter of the thin-walled pipe fittings.

[0012] Further, in the above-mentioned bending device for manufacturing thin-walled aviation bent pipe fittings, the inner support spring conveying assembly includes a welding support, a guide pipe, a gear box, and a driving gear. The guide pipe is fixed to the installation base through the welding support. A conveying channel matched with the outer diameter of the inner support spring is provided inside the guide pipe. Gear boxes are symmetrically installed on both sides of the guide pipe, and driving gears capable of meshing with the spring body in the inner support spring are installed in the gear boxes.

[0013] The present invention also provides a bending method for manufacturing thin-walled aviation bent pipe fittings, which is realized based on the above-mentioned bending device for manufacturing thin-walled aviation bent pipe fittings, and includes the following steps:

[0014] 1) Use a manipulator to insert the thin-walled pipe fitting into the clamping assembly and the bending assembly, and the clamping assembly and the bending assembly respectively clamp the thin-walled pipe fitting;

[0015] 2) Use the inner support spring transmission assembly to send the inner support spring of the spring-type electric heater into the thin-walled pipe fitting, and use the spring-type electric heater to preheat the thin-walled pipe fitting;

[0016] 3) Use the bending assembly to drive the thin-walled pipe fitting to bend towards the arc-shaped pressure-bearing block to form a thin-walled aviation bent pipe fitting with the required radian;

[0017] 4) After the bending is completed, first use the inner support spring transmission assembly to take out the inner support spring of the spring-type electric heater, then control the clamping assembly to release the clamping, the clamping assembly disengages from the thin-walled aviation bent pipe fitting under the action of its own linear guide pair, and finally use the manipulator to disengage the thin-walled aviation bent pipe fitting from the bending assembly.

[0018] The beneficial effects of the present invention are as follows:

[0019] The present invention has a reasonable structural design. It mainly consists of a mounting base, an arc-shaped pressure-bearing block, a clamping assembly, a bending assembly, an inner support spring transmission assembly and a spring-type electric heater. Each component cooperates with each other. The clamping assembly is used to clamp the thin-walled pipe fitting, the inner support spring transmission assembly is used to transmit the inner support spring into the thin-walled pipe fitting or take out the inner support spring from the thin-walled pipe fitting, and the bending assembly can drive the thin-walled pipe fitting to bend towards the arc-shaped pressure-bearing block, thereby forming a thin-walled aviation bent pipe fitting with the required radian. In this way, internal support can be provided during the bending process of the thin-walled aviation bent pipe fitting, avoiding deformation problems such as collapse during the bending process of the thin-walled aviation bent pipe fitting; at the same time, it can heat the thin-walled aviation bent pipe fitting before and during bending, which is beneficial to increasing the plasticity of the thin-walled aviation bent pipe fitting and reducing the risk of its rupture.

[0020] Of course, it is not necessary for any product implementing the present invention to achieve all the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic diagram of the overall use state of the present invention;

[0023] Figure 2 It is a schematic structural view of the arc-shaped pressure-bearing block in the present invention;

[0024] Figure 3 It is a schematic structural view of the clamping assembly in the present invention;

[0025] Figure 4 It is a schematic structural view of the bending assembly in the present invention;

[0026] Figure 5 It is a schematic structural view of the turntable and its upper components in the present invention;

[0027] Figure 6 It is a schematic structural view of the inner support spring transmission assembly in the present invention;

[0028] In the drawings, the components represented by each reference numeral are as follows:

[0029] 1 - mounting base, 2 - arc-shaped pressure-bearing block, 3 - clamping assembly, 301 - slide rail, 302 - slider, 303 - first mounting seat, 304 - first slip ring, 305 - first hydraulic expansion sleeve, 4 - bending assembly, 401 - positioning ring sleeve, 402 - positioning shaft, 403 - lever, 404 - connecting shaft, 405 - turntable, 406 - second mounting seat, 407 - second slip ring, 408 - second hydraulic expansion sleeve, 5 - inner support spring transmission assembly, 501 - welding support, 502 - guide tube, 503 - gear box, 504 - driving gear, 6 - inner support spring, 7 - joint, 8 - thin-walled pipe fitting. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0031] As Figures 1-6 shown, this embodiment is a bending device for producing thin-walled aviation bent pipe fittings, including a mounting base 1, an arc-shaped pressure-bearing block 2, a clamping assembly 3, a bending assembly 4, an inner support spring transmission assembly 5 and a spring-type electric heater. The spring-type electric heater includes an inner support spring 6 and a joint 7 provided at its tail end. The arc-shaped pressure-bearing block 2 is installed on the mounting base 1. A clamping assembly 3 for clamping the thin-walled pipe fitting 8 and an inner support spring transmission assembly 5 for transmitting the inner support spring 6 into the thin-walled pipe fitting 8 are installed on one side of the mounting base 1 where the arc-shaped pressure-bearing block 2 is located. A bending assembly 4 for driving the thin-walled pipe fitting 8 to bend towards the arc-shaped pressure-bearing block 2 is installed on the other side of the mounting base 1 where the arc-shaped pressure-bearing block 2 is located.

[0032] In this embodiment, an open arc-shaped groove for facilitating the clamping of the thin-walled pipe fitting 8 is formed in the arc-shaped pressure-bearing block 2, and the cross-section of the open arc-shaped groove is in a U-shaped structure.

[0033] In this embodiment, the clamping assembly 3 includes a slide rail 301, a slider 302, a first mounting seat 303, a first sliding ring 304, and a first hydraulic expansion sleeve 305. The slide rail 301 is fixed on the mounting base 1, and a slider 302 that forms a linear guide pair with it is mounted on the slide rail 301. A first mounting seat 303 is fixed on the upper side of the slider 302. A first sliding ring 304 is movably restricted in the first mounting seat 303, and a first hydraulic expansion sleeve 305 for clamping the thin-walled pipe fitting 8 is mounted in the first sliding ring 304.

[0034] In this embodiment, the bending assembly 4 includes a positioning ring sleeve 401, a positioning shaft 402, a lever 403, a connecting shaft 404, a turntable 405, a second mounting seat 406, a second sliding ring 407, and a second hydraulic expansion sleeve 408. The positioning ring sleeve 401 is fixed on the mounting base 1. One end of the lever 403 is fixed with a positioning shaft 402 that is movably restricted in the positioning ring sleeve 401. The positioning shaft 402 is movably restricted on the lever 403. A second mounting seat 406 is fixed to the outside of the positioning shaft 402 through the turntable 405. A second sliding ring 407 is movably restricted in the second mounting seat 406, and a second hydraulic expansion sleeve 408 for clamping the thin-walled pipe fitting is mounted in the second sliding ring 407.

[0035] In this embodiment, an arc-shaped movable groove for facilitating the avoidance of the positioning shaft 402 is formed on the mounting base 1.

[0036] In this embodiment, the outer diameter of the inner support spring 6 in the spring-type electric heater is matched with the inner diameter of the thin-walled pipe fitting 8.

[0037] In this embodiment, the inner support spring transmission assembly 5 includes a welding support 501, a guide tube 502, a gear box 503, and a driving gear 504. The guide tube 502 is fixed to the mounting base 1 through the welding support 501. A transmission channel that matches the outer diameter of the inner support spring 6 is provided inside the guide tube 502. Gear boxes 503 are symmetrically mounted on both sides of the guide tube 502, and driving gears 504 that can mesh with the spring body in the inner support spring 6 are mounted in the gear boxes 503.

[0038] This embodiment also provides a bending method for manufacturing a thin-walled aviation bent pipe fitting, including the following steps:

[0039] 1) Use a manipulator to insert the thin-walled pipe fitting 8 into the clamping assembly 3 and the bending assembly 4, and the clamping assembly 3 and the bending assembly 4 respectively clamp the thin-walled pipe fitting 8;

[0040] 2) Use the inner support spring transmission component 5 to send the inner support spring 6 of the spring-type electric heater into the thin-walled pipe fitting 8, and use the spring-type electric heater to preheat the thin-walled pipe fitting 8;

[0041] 3) Use the bending component 4 to drive the thin-walled pipe fitting 8 to bend towards the arc-shaped pressure-bearing block 2 to form a thin-walled aviation bent pipe fitting with the required radian;

[0042] 4) After the bending is completed, first use the inner support spring transmission component 5 to take out the inner support spring 6 of the spring-type electric heater, then control the first hydraulic expansion sleeve 305 of the clamping component 3 to release the clamping, and the first hydraulic expansion sleeve 305 in the clamping component 3 is separated from the thin-walled aviation bent pipe fitting under the action of the linear guide pair. Finally, use the manipulator to separate the thin-walled aviation bent pipe fitting from the bending component 4.

[0043] A specific application of this embodiment is as follows: This device mainly consists of a mounting base 1, an arc-shaped pressure-bearing block 2, a clamping component 3, a bending component 4, an inner support spring transmission component 5, and a spring-type electric heater. Each component cooperates with each other. The clamping component 3 is used to clamp the thin-walled pipe fitting 8, the inner support spring transmission component 5 is used to transmit the inner support spring 6 into the thin-walled pipe fitting 8 or take out the inner support spring 6 from the thin-walled pipe fitting 8, and the bending component 4 can drive the thin-walled pipe fitting 8 to bend towards the arc-shaped pressure-bearing block 2, thereby forming a thin-walled aviation bent pipe fitting with the required radian. In this way, internal support can be provided during the bending process of the thin-walled aviation bent pipe fitting to avoid deformation problems such as collapse during the bending process of the thin-walled aviation bent pipe fitting; at the same time, it can heat the thin-walled aviation bent pipe fitting before and during bending, which is beneficial to increasing the plasticity of the thin-walled aviation bent pipe fitting and reducing the risk of its rupture.

[0044] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation manners. Obviously, many modifications and variations can be made according to the content of this specification. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A bending device for producing thin-walled aviation bent pipes, characterized in that: It includes a mounting base, an arc-shaped pressure block, a clamping assembly, a bending assembly, an inner support spring transmission assembly and a spring-type electric heater, wherein the spring-type electric heater comprises an inner support spring and a joint arranged at the tail end thereof, and an arc-shaped pressure block is mounted on the mounting base, and a clamping assembly for clamping a thin-walled pipe and an inner support spring transmission assembly for transmitting the inner support spring into the thin-walled pipe are mounted on one side of the arc-shaped pressure block, and a bending assembly for driving the thin-walled pipe to bend toward the arc-shaped pressure block is mounted on the other side of the arc-shaped pressure block.

2. The bending device for producing thin-walled aviation bent pipes according to claim 1, characterized in that: The arc-shaped pressure-bearing block is provided with an open arc-shaped groove for facilitating the insertion of thin-walled pipe fittings.

3. The bending device for producing thin-walled aviation bent pipe parts according to claim 2 is characterized in that: The clamping assembly includes a slide rail, a slider, a first mounting seat, a first slip ring and a first hydraulic expansion sleeve. The slide rail is fixed on a mounting base. A slider is installed on the slide rail to form a linear guide pair. The first mounting seat is fixed on the upper side of the slider. The first mounting seat is limited in movement by a first slip ring. The first slip ring is installed in the first hydraulic expansion sleeve for clamping thin-walled pipe fittings.

4. The bending device for producing thin-walled aviation bent pipes according to claim 3 is characterized in that: The bending assembly includes a positioning ring sleeve, a positioning shaft, a shift rod, a connecting shaft, a turntable, a second mounting seat, a second slip ring and a second hydraulic expansion sleeve. The positioning ring sleeve is fixed on the mounting base. One end of the shift rod is fixed with a positioning shaft movably restricted in the positioning ring sleeve. The shift rod is movably restricted with the positioning shaft. The outer side of the positioning shaft is fixed with a second mounting seat via a turntable. The second mounting seat is movably restricted with a second slip ring. The second slip ring is installed with a second hydraulic expansion sleeve for clamping thin-walled pipe fittings.

5. The bending device for producing thin-walled aviation bent pipes according to claim 4, characterized in that: The installation base is provided with an arc-shaped movable groove for evading the positioning shaft.

6. The bending device for producing thin-walled aviation bent pipes according to claim 5, characterized in that: The outer diameter of the inner support spring in the spring-type electric heater matches the inner diameter of the thin-walled pipe.

7. The bending device for producing thin-walled aviation bent pipes according to claim 6, characterized in that: The inner support spring transmission assembly includes a welding support, a guide tube, a gear box and a driving gear. The guide tube is fixed to the mounting base through the welding support. The interior of the guide tube is provided with a transmission channel that matches the outer diameter of the inner support spring. Gear boxes are symmetrically installed on both sides of the guide tube. The gear box is installed with a driving gear that can mesh with the spring body in the inner support spring.

8. A bending method for producing thin-walled aviation bent pipe parts, implemented based on the bending device for producing thin-walled aviation bent pipe parts according to claim 7, characterized in that: The steps include: 1) Using a manipulator to insert the thin-walled pipe into the clamping assembly and the bending assembly, the clamping assembly and the bending assembly clamp the thin-walled pipe respectively; 2) Using the inner support spring transmission assembly to send the inner support spring of the spring-type electric heater into the thin-walled pipe fitting, and using the spring-type electric heater to preheat the thin-walled pipe fitting; 3) Using the bending assembly to drive the thin-walled pipe to bend toward the arc-shaped pressure block to form a thin-walled aviation bent pipe with the required curvature; 4) After the bending is completed, the inner support spring of the spring-type electric heater is first removed by using the inner support spring conveying assembly, and then the clamping assembly is controlled to release the clamping. The clamping assembly is separated from the thin-walled aviation bent pipe under the action of its own linear guide pair, and finally the thin-walled aviation bent pipe is separated from the bending assembly by a manipulator.

Images