Extrusion forming device and method for aviation thin-walled tube production

Abstract

The invention belongs to the technical field of aviation accessory production, and particularly relates to an extrusion forming device and method for aviation thin-walled tube production. The device is reasonable in structural design and is mainly composed of the base assembly, the core column assembly, the sectioning assemblies and the extrusion assembly, the base assembly can drive the sectioning assemblies to conduct radial displacement, after all the sectioning assemblies are spliced, the sectioning assemblies and the core column assembly can jointly form a forming cavity, the extrusion assembly can extrude a cylindrical blank pipe, and the extrusion efficiency is improved. And the end part is hot-extruded into a flange structure in a heating state. All the components cooperate with one another, on one hand, an automatic shaping function is achieved, the shape of a cylindrical blank pipe can be shaped in the extrusion forming process, and parameters such as straightness of the cylindrical blank pipe meet standard requirements; and on the other hand, the cylindrical blank pipe can be continuously heated in the hot extrusion process, and the extrusion forming requirement of the thin and long thin-walled pipe with the flange cannot be met.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation parts production, and in particular relates to an extrusion molding device and method for producing aviation thin-walled tubes. Background Art

[0002] Slender thin-walled tubes with flanges made of high-temperature resistant aluminum alloy can be used in the fuel system of jet engines. The flange structure provides reliable sealing under high temperature and high pressure environments and can withstand fuel flushing pressure above 650°C. At the same time, the thin-wall design reduces the overall pipeline weight.

[0003] The traditional extrusion molding device for the production of aviation thin-walled tubes was found to have shortcomings during use. First, it does not have an automatic shaping function and cannot shape the shape of the cylindrical blank tube during the extrusion molding process to make its parameters such as straightness meet the standard requirements; second, it cannot continuously heat it during the hot extrusion process and cannot meet the extrusion molding requirements of slender thin-walled tubes with flanges. Therefore, it is necessary to optimize and improve the traditional extrusion molding device for the production of aviation thin-walled tubes. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems existing in the conventional technology and to provide an extrusion molding device and method for producing aviation thin-walled tubes.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] The present invention provides an extrusion molding device for producing aviation thin-walled tubes, comprising a base assembly, a core column assembly, a petal assembly and an extrusion assembly, wherein a core column assembly is fixed at the center of the base assembly, a plurality of petal assemblies are circumferentially arranged on the periphery of the core column assembly, and the extrusion assembly is arranged above the core column assembly. The base assembly can drive each petal assembly to perform radial displacement, and when all the petal assemblies are spliced, they can form a molding cavity together with the core column assembly, the shape of the molding cavity matches the shape of a slender thin-walled tube with a flange, the molding cavity is composed of a flange molding area and a sliding tube area located on the upper side thereof, the specifications of the sliding tube area match the specifications of a cylindrical blank tube, and the extrusion assembly can extrude the cylindrical blank tube stuck in the sliding tube area, so that the end of the cylindrical blank tube is hot-extruded into a flange structure under heating.

[0007] Furthermore, in the above-mentioned extrusion molding device for producing aviation thin-walled tubes, the base assembly includes a base, a rotary drive, a turntable and a movable support block, an installation cavity is provided inside the base, a rotary drive is installed at the lower part of the installation cavity, a turntable driven by the rotary drive is installed at the upper part of the installation cavity, a top plate of the base located above the installation cavity is provided with a plurality of radial slide grooves along the circumferential direction, a plurality of arc-shaped slide grooves are provided inwardly on the upper side of the turntable, the bottom end of the movable support block is slidably restricted in the corresponding arc-shaped slide groove, the upper part of the movable support block is slidably restricted in the corresponding radial slide groove, and the top end of the movable support block is fixed to the corresponding petal assembly.

[0008] Furthermore, in the above-mentioned extrusion molding device for producing aviation thin-walled tubes, avoidance holes for avoiding the core column assembly are opened at the center of the top plate of the base and the center of the turntable.

[0009] Furthermore, in the above-mentioned extrusion molding device for producing aviation thin-walled tubes, the core column assembly is divided into a lower column section, a conical column section and an upper column section from bottom to top, and a cylindrical heating rod is installed inside the core column assembly.

[0010] Furthermore, in the above-mentioned extrusion molding device for the production of aviation thin-walled tubes, the petal assembly includes an upper petal block, a lower petal block and a groove-type heating plate, the inner sides of the upper petal block and the lower petal block are jointly provided with a petal molding groove, and the interior of the lower petal block is embedded with a groove-type heating plate.

[0011] Furthermore, in the above-mentioned extrusion molding device for producing aviation thin-walled tubes, the lower side of the upper petal block is fixed to the top end of the movable support block, and a reinforcing rib plate is welded between the upper side of the upper petal block and the outer side of the lower petal block.

[0012] Furthermore, in the above-mentioned extrusion molding device for the production of aviation thin-walled tubes, the extrusion assembly includes a horizontal linear guide pair, a hydraulic push rod, an open lock cylinder and an extrusion push block. A hydraulic push rod is installed on the lower side of the slider of the horizontal linear guide pair, and an open lock cylinder is installed on the movable end of the hydraulic push rod. The inner cavity diameter of the open lock cylinder is matched with the outer diameter of the column where the lower petal block is located, and an extrusion push block is installed on the inner side of the top plate of the open lock cylinder, and an annular positioning groove is opened inward at the lower end of the extrusion push block.

[0013] The present invention also provides an extrusion molding method for producing aviation thin-walled tubes, which is implemented based on the above-mentioned extrusion molding device for producing aviation thin-walled tubes, and comprises the following steps:

[0014] 1) Using a manipulator to sleeve the cylindrical blank tube on the outside of the core column assembly;

[0015] 2) Using the base assembly to drive each petal assembly to move radially inward until they are spliced ​​together, and using the core column assembly and the petal assembly to heat the cylindrical blank tube;

[0016] 3) Using the extrusion assembly to push the cylindrical blank tube downward, and forming a flange structure at its end by hot extrusion;

[0017] 4) After the hot forming is completed, the extrusion assembly is reset, and the base assembly is used to drive each petal assembly to move radially outward, and the slender thin-walled tube with flange is taken away by a manipulator.

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

[0019] The structural design of the present invention is reasonable. It is mainly composed of a base component, a core column component, a petal component and an extrusion component. The base component can drive each petal component to perform radial displacement. When all the petal components are spliced, they can form a molding cavity together with the core column component. The shape of the molding cavity matches the shape of the slender thin-walled tube with a flange. The molding cavity is composed of a flange molding area and a sliding tube area located on its upper side. The specifications of the sliding tube area match the specifications of the cylindrical blank tube. The extrusion component can extrude the cylindrical blank tube inserted into the sliding tube area so that its end is hot-extruded into a flange structure under heating. The various components of the present invention cooperate with each other. On the one hand, it has an automatic shaping function and can shape the shape of the cylindrical blank tube during the extrusion molding process so that its parameters such as straightness meet the standard requirements; on the other hand, it can continuously heat the cylindrical blank tube during the hot extrusion process, which cannot meet the extrusion molding requirements of the slender thin-walled tube with a flange.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the state of the extrusion molding device of the present invention after loading the cylindrical blank tube;

[0023] Figure 2 It is a schematic diagram of the state of the extrusion molding device of the present invention after molding is completed;

[0024] Figure 3 It is a schematic structural diagram of a cylindrical blank tube in the present invention;

[0025] Figure 4 It is a schematic structural diagram of a slender thin-walled tube with a flange in the present invention;

[0026] Figure 5It is a structural schematic diagram of the base assembly in the present invention;

[0027] Figure 6 is a schematic top view of the base in the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the rotary driver in the present invention;

[0029] Figure 8 It is a structural schematic diagram of the turntable in the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the movable support block in the present invention;

[0031] Fig.10 It is a structural schematic diagram of the core column assembly in the present invention;

[0032] Fig.11 It is a structural schematic diagram of the petal splitting assembly in the present invention;

[0033] Fig.12 It is a schematic diagram of the structure of the extrusion assembly in the present invention;

[0034] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0035] 1-base assembly, 101-base, 102-rotation drive, 103-turntable, 104-movable support block;

[0036] 2-core column assembly, 201-lower column section, 202-conical column section, 203-upper column section, 204-columnar heating rod;

[0037] 3-petal assembly, 301-upper petal block, 302-lower petal block, 303-petal forming groove, 304-groove heating plate, 305-reinforcement rib plate;

[0038] 4-extrusion assembly, 401-horizontal linear guide pair, 402-hydraulic push rod, 403-open lock cylinder, 404-extrusion push block;

[0039] 5- cylindrical blank tube;

[0040] 6-Slender thin-walled tube with flange. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] like Figure 1-Figure 4 As shown, this embodiment is an extrusion molding device for the production of aviation thin-walled tubes, including a base assembly 1, a core column assembly 2, a petal assembly 3 and an extrusion assembly 4. The core column assembly 2 is fixed at the center of the base assembly 1, and a plurality of petal assemblies 3 are circumferentially arranged on the periphery of the core column assembly 2, and the extrusion assembly 4 is arranged above the core column assembly 2. The base assembly 1 can drive each petal assembly 3 to radially displace, and when all the petal assemblies 3 are spliced, they can form a molding cavity together with the core column assembly 2. The shape of the molding cavity matches the shape of the slender thin-walled tube 6 with a flange. The molding cavity is composed of a flange molding area and a sliding tube area located on the upper side thereof, and the specifications of the sliding tube area match the specifications of the cylindrical blank tube 7. The extrusion assembly 4 can extrude the cylindrical blank tube 5 inserted into the sliding tube area, so that its end is hot-extruded into a flange structure under heating.

[0043] like Figure 5-Figure 9 As shown, the base assembly 1 includes a base 101, a rotary driver 102, a turntable 103 and a movable support block 104. The base 101 is provided with an installation cavity inside, the rotary driver 102 is installed at the lower part of the installation cavity, and the turntable 103 driven to rotate by the rotary driver 102 is installed at the upper part of the installation cavity. The top plate of the base 101 located above the installation cavity is provided with a plurality of radial slide grooves 105 along the circumferential direction, and the upper side of the turntable 103 is provided with a plurality of arc-shaped slide grooves 106 inwardly, the bottom end of the movable support block 104 is slidably restricted in the corresponding arc-shaped slide grooves 106, the upper part of the movable support block 104 is slidably restricted in the corresponding radial slide grooves 105, and the top end of the movable support block 104 is fixed to the corresponding petal assembly 3.

[0044] In this embodiment, a clearance hole for evading the core column assembly 2 is opened at the center of each of the top plate of the base 101 and the rotating disk 103 .

[0045] like Fig.10 As shown, the core column assembly 2 is divided from bottom to top into a lower column section 201, a tapered column section 202 and an upper column section 203, and the specifications of the lower column section 201, the tapered column section 202 and the upper column section 203 match the specifications of the inner cavity of the slender thin-walled tube 6 with flange. A cylindrical heating rod 204 is installed inside the core column assembly 2.

[0046] like Fig.11 As shown, the petal assembly 3 includes an upper petal block 301, a lower petal block 302 and a groove-shaped heating plate 304. The inner sides of the upper petal block 301 and the lower petal block 302 are jointly provided with a petal forming groove 303, and a groove-shaped heating plate 304 is embedded and installed inside the lower petal block 302.

[0047] In this embodiment, the lower side of the upper petal block 301 is fixed to the top of the movable support block 104 , and a reinforcing rib plate 305 is welded between the upper side of the upper petal block 301 and the outer side of the lower petal block 302 .

[0048] like Fig.12 As shown, the extrusion assembly 4 includes a horizontal linear guide pair 401, a hydraulic push rod 402, an open lock cylinder 403 and an extrusion push block 404. The hydraulic push rod 402 is installed on the lower side of the slider of the horizontal linear guide pair 401, and the open lock cylinder 403 is installed on the movable end of the hydraulic push rod 402. The inner cavity diameter of the open lock cylinder 403 matches the outer diameter of the column where the lower petal block 302 is located. The extrusion push block 404 is installed on the inner side of the top plate of the open lock cylinder 403, and the lower end of the extrusion push block 404 is provided with an annular positioning groove that matches the specifications of the cylindrical blank tube 5.

[0049] This embodiment also provides an extrusion molding method for producing aviation thin-walled tubes, comprising the following steps:

[0050] 1) Using a manipulator, the cylindrical blank tube 5 is sleeved on the outer side of the upper column section 203 in the core column assembly 2;

[0051] 2) The rotary drive 102 in the base assembly 1 is used to drive the turntable 103 to rotate, and the turntable 103 drives each petal assembly 3 to move radially inward through the movable support block 104 until they are spliced ​​together, and the cylindrical blank tube 5 is heated by the cylindrical heating rod 204 of the core column assembly 2 and the grooved heating plate 304 of the petal assembly 3;

[0052] 3) Using the extrusion assembly 4 to push the cylindrical blank tube 5 downward in a reciprocating impact manner, and forming a flange structure at its end by hot extrusion;

[0053] 4) After the hot forming is completed, the extrusion assembly 4 is reset, and the rotary driver 102 in the base assembly 1 is used to drive the turntable 103 to rotate. The turntable 103 drives each petal assembly 3 to move radially outward through the movable support block 104, and the slender thin-walled tube 6 with flange is taken away by a robot.

[0054] A specific application of this embodiment is: the present invention is mainly composed of a base component 1, a core column component 2, a petal component 3 and an extrusion component 4. The base component 1 can drive each petal component 3 to perform radial displacement. When all the petal components 3 are spliced, they can form a molding cavity together with the core column component 2. The shape of the molding cavity matches the shape of the slender thin-walled tube 6 with a flange. The molding cavity is composed of a flange molding area and a sliding tube area located on its upper side. The specifications of the sliding tube area match the specifications of the cylindrical blank tube 7. The extrusion component 4 can extrude the cylindrical blank tube 5 inserted into the sliding tube area so that its end is hot-extruded into a flange structure under heating. The various components of the present invention cooperate with each other. On the one hand, it has an automatic shaping function, which can shape the shape of the cylindrical blank tube 5 during the extrusion molding process so that its parameters such as straightness meet the standard requirements; on the other hand, it can continuously heat the cylindrical blank tube 5 during the hot extrusion process, which cannot meet the extrusion molding requirements of the slender thin-walled tube 6 with a flange.

[0055] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An extrusion molding device for producing aviation thin-walled tubes, characterized in that: It includes a base assembly, a core column assembly, a petal assembly and an extrusion assembly. A core column assembly is fixed at the center of the base assembly. A plurality of petal assemblies are circumferentially arranged on the periphery of the core column assembly. The extrusion assembly is arranged above the core column assembly. The base assembly can drive each petal assembly to perform radial displacement. When all the petal assemblies are spliced, they can form a molding cavity together with the core column assembly. The shape of the molding cavity matches the shape of a slender thin-walled tube with a flange. The molding cavity is composed of a flange molding area and a sliding tube area located on its upper side. The specifications of the sliding tube area match the specifications of the cylindrical blank tube. The extrusion assembly can extrude the cylindrical blank tube stuck in the sliding tube area so that the end of the cylindrical blank tube is hot-extruded into a flange structure under heating.

2. The extrusion molding device for producing aviation thin-walled tubes according to claim 1, characterized in that: The base assembly includes a base, a rotary drive, a turntable and a movable support block, an installation cavity is provided inside the base, a rotary drive is installed at the lower part of the installation cavity, a turntable driven by the rotary drive is installed at the upper part of the installation cavity, a top plate of the base located above the installation cavity is provided with a plurality of radial slide grooves along the circumferential direction, a plurality of arc-shaped slide grooves are provided inwardly on the upper side of the turntable, the bottom end of the movable support block is slidably restricted in the corresponding arc-shaped slide grooves, the upper part of the movable support block is slidably restricted in the corresponding radial slide grooves, and the top end of the movable support block is fixed to the corresponding petal assembly.

3. The extrusion molding device for producing aviation thin-walled tubes according to claim 2, characterized in that: The top plate of the base and the center of the turntable are respectively provided with avoidance holes for avoiding the core column assembly.

4. The extrusion molding device for producing aviation thin-walled tubes according to claim 3, characterized in that: The core column assembly is divided into a lower column section, a conical column section and an upper column section from bottom to top, and a columnar heating rod is installed inside the core column assembly.

5. The extrusion molding device for producing aviation thin-walled tubes according to claim 4, characterized in that: The petal assembly includes an upper petal block, a lower petal block and a grooved heating plate. The inner sides of the upper petal block and the lower petal block are both provided with petal forming grooves, and the lower petal block is embedded with a grooved heating plate.

6. The extrusion molding device for producing aviation thin-walled tubes according to claim 5, characterized in that: The lower side of the upper petal block is fixed to the top end of the movable support block, and a reinforcing rib plate is welded between the upper side of the upper petal block and the outer side of the lower petal block.

7. The extrusion molding device for producing aviation thin-walled tubes according to claim 6, characterized in that: The extrusion assembly includes a horizontal linear guide pair, a hydraulic push rod, an open lock cylinder and an extrusion push block. A hydraulic push rod is installed on the lower side of the slider of the horizontal linear guide pair, and an open lock cylinder is installed on the movable end of the hydraulic push rod. The inner cavity diameter of the open lock cylinder matches the outer diameter of the column where the lower petal block is located. An extrusion push block is installed on the inner side of the top plate of the open lock cylinder, and an annular positioning groove is opened inward at the lower end of the extrusion push block.

8. An extrusion molding method for producing aviation thin-walled tubes, implemented based on the extrusion molding device for producing aviation thin-walled tubes according to claim 7, characterized in that: The steps include: 1) Using a manipulator to sleeve the cylindrical blank tube on the outside of the core column assembly; 2) Using the base assembly to drive each petal assembly to move radially inward until they are spliced ​​together, and using the core column assembly and the petal assembly to heat the cylindrical blank tube; 3) Using the extrusion assembly to push the cylindrical blank tube downward, and forming a flange structure at its end by hot extrusion; 4) After the hot forming is completed, the extrusion assembly is reset, and the base assembly is used to drive each petal assembly to move radially outward, and the slender thin-walled tube with flange is taken away by a manipulator.

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