Rear ventilator blocking ring assembling structure and method

Abstract

The invention belongs to the technical field of machining and manufacturing, and relates to a rear ventilator blocking ring assembling structure and method. Comprising the following steps: arranging a first guide degree surface on a seam allowance of a rear ventilator main body; a second guide degree surface is arranged on the inner side of the rear ventilator blocking ring; the rear ventilator blocking ring is installed in a core removing groove of the rear ventilator body; slowly and uniformly applying pressure to press the rear ventilator blocking ring in place; carrying out electron beam welding on the rear ventilator blocking ring which is mounted in place; and the first guide degree surface and the second guide degree surface are arranged on the rear ventilator main body and the rear ventilator blocking ring. The first guide face and the second guide face are arranged to be matched, early-stage interference guiding is achieved, horizontal inclination of the blocking ring is avoided, and compared with a traditional straight groove structure, the problems that a blocking cover of a traditional structure is difficult to install, and cracks are prone to being generated are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing and manufacturing, and relates to a rear ventilator blocking ring assembly structure and method. Background Art

[0002] The raw material of the rear ventilator of an aircraft engine is ZL114A casting. The part cavity is complex, and it is impossible to completely remove the ceramic core during the integral casting. It can only be cast in split parts, leaving a core removal ring groove on the main body. In the later processing, the stopper is turned and the plugging ring is equipped for welding. Since the plugging ring is relatively thin at the end of processing, the weld will tear due to shrinkage. Therefore, the plugging ring and the main body are required to have an interference fit to prevent the weld from tearing after welding.

[0003] Because the blocking ring and the rear ventilator body are interference fit, and the blocking ring is a ring-shaped part, the outer circle and the inner hole must fit together at the same time during assembly. The traditional liquid nitrogen freezing or heating method cannot be used for base assembly, and only mechanical pressing can be used. The traditional core-stripping ring groove assembly is relatively difficult. The blocking ring is often tilted horizontally during pressing, resulting in uneven force on the weld, and cracks often appear in the weld after welding. Summary of the Invention

[0004] The purpose of the present invention is to provide a rear ventilator blocking ring assembly structure and method to solve the technical problems in the prior art that the traditional core-stripping ring groove assembly is difficult, the blocking ring is often tilted horizontally during press assembly, resulting in uneven stress on the weld and frequent cracks in the weld after welding.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present application discloses a method for assembling a rear ventilator blocking ring, comprising: A first guide surface is provided on the stopper of the rear ventilator body; a second guide surface is provided on the inner side of the blocking ring of the rear ventilator; Install the rear ventilator blocking ring into the core stripping groove of the rear ventilator body; Apply pressure slowly and evenly to press the rear ventilator plugging ring into place; Electron beam welding the installed rear ventilator blocking ring; Remove the first guide surface and the second guide surface on the rear ventilator body and the rear ventilator blocking ring.

[0006] Preferably, the angle of the first guide surface is designed to be 16° +10′ .

[0007] Preferably, the inner diameter of the rear ventilator blocking ring matches the inner side size of the stop, and the interference is 0.02 to 0.06 mm.

[0008] Preferably, the outer diameter of the rear vent plug ring is matched with the outer diameter of the stopper, and the interference is 0.02-0.06 mm.

[0009] Preferably, the degree surface angle of the second guiding degree surface is designed as 16° +10′ Preferably, the pressure is applied by using a special tool to contact the rear vent plug ring.

[0010] Preferably, the special tool comprises a pressing cap, and a supporting ring is connected to the pressing cap by bolts.

[0011] Preferably, the inner diameter of the supporting ring is matched with the rear vent body, and the gap is 0.2-0.3 mm.

[0012] Preferably, the pressure is slowly and uniformly applied by a press on the special pressing tool to press the rear vent plug ring into place.

[0013] In the second aspect, the application discloses a rear vent plug ring assembly structure prepared by using the assembly method.

[0014] Compared with the prior art, the application has the following beneficial effects: The application discloses a reliable design structure of the rear vent plug ring assembly, a guiding degree surface is added at the position of the main body stopper, a process guiding degree surface is added during the processing of the plug ring, the guiding and positioning of the degree surface are used during the assembly of the plug ring, a special pressing tool is invented, the plug ring is horizontally pressed, the process guiding degree surface on the plug ring and the main body is removed by turning after being pressed, welding is performed, the welding quality is ensured, and the generation of welding cracks is avoided. 1) The rear vent body core removal guiding groove structure (the first guiding degree surface and the second guiding degree surface are matched) is designed, compared with the traditional straight groove structure, and the problem of difficult installation of the plug cover is solved.

[0015] 2) The special pressing tool for the installation of the plug cover is invented, the plug ring is horizontally pressed, the process guiding degree surface on the plug ring and the main body is removed by turning after being pressed, welding is performed, the welding quality is ensured, and the generation of welding cracks is avoided. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 This is a schematic diagram of the main structure of the rear ventilator according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the blocking ring structure of the rear ventilator according to an embodiment of the present invention; Figure 3 Schematic diagram of the press-fitting tooling structure according to an embodiment of the present invention.

[0018] Among them: 1-rear ventilator body; 2-first guide surface; 3-rear ventilator blocking ring; 4-second guide surface; 5-inside of the blocking ring; 6-outside of the blocking ring; 7-pressure cover; 8-bolt; 9-support ring; 10-inside of the stopper; 11-outside of the stopper. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] The present invention is described in further detail below with reference to the accompanying drawings: See also Figure 1~Figure 2 The present application discloses a method for assembling a rear ventilator blocking ring, comprising: A first guide surface 2 is provided on the stopper of the rear ventilator body 1; a second guide surface 4 is provided on the inner side 5 of the blocking ring 3 of the rear ventilator; Install the rear ventilator blocking ring 3 into the core stripping groove of the rear ventilator body 1; Apply pressure slowly and evenly to press the rear ventilator blocking ring 3 into place; Electron beam welding the installed rear ventilator blocking ring 3; The first guide surface 2 and the second guide surface 4 on the rear ventilator main body 1 and the rear ventilator plugging ring 3 are removed by machining. The present application designs a core-removing guide groove structure for the rear ventilator main body (with a first guide surface and a second guide surface matched together). Compared with the traditional straight groove structure, it solves the problem of difficulty in installing the plugging cover with the traditional structure. In order to ensure the reliability of the plugging ring installation and improve the welding quality, the present application invents a design structure for reliable assembly of the rear ventilator plugging ring, adds a guide surface at the main body stop position, adds a process guide surface when processing the plugging ring, guides and positions the plugging ring through the surface when assembling it, and invents a special pressing tool to ensure that the plugging ring is pressed in horizontally. After pressing in, the process guide surfaces on the plugging ring and the main body are removed by machining, and welding is performed to ensure welding quality and avoid the occurrence of welding cracks.

[0026] In some embodiments, a method for assembling a rear ventilator blocking ring includes: A first guide surface 2 is provided on the stopper of the rear ventilator body 1; a second guide surface 4 is provided on the inner side 5 of the blocking ring 3 of the rear ventilator; Install the rear ventilator blocking ring 3 into the core stripping groove of the rear ventilator body 1; Apply pressure slowly and evenly to press the rear ventilator blocking ring 3 into place; Electron beam welding the installed rear ventilator blocking ring 3; Remove the first guide surface 2 and the second guide surface 4 on the rear ventilator body 1 and the rear ventilator blocking ring 3.

[0027] In some embodiments, a method for assembling a rear ventilator blocking ring includes: A first guide surface 2 is provided on the stop of the rear ventilator body 1; the angle of the first guide surface 2 is designed to be 16° +10′ ; A second guide surface 4 is provided on the inner side 5 of the rear ventilator blocking ring 3; the inner diameter of the rear ventilator blocking ring 3 matches the inner size of the stop 10, and the interference is 0.02 to 0.06 mm; Install the rear ventilator blocking ring 3 into the core stripping groove of the rear ventilator body 1; Apply pressure slowly and evenly to press the rear ventilator blocking ring 3 into place; Electron beam welding the installed rear ventilator blocking ring 3; Remove the first guide surface 2 and the second guide surface 4 on the rear ventilator body 1 and the rear ventilator blocking ring 3.

[0028] In some embodiments, a method for assembling a rear ventilator blocking ring includes: A first guide surface 2 is provided on the stopper of the rear ventilator body 1; a second guide surface 4 is provided on the inner side 5 of the blocking ring 3 of the rear ventilator; the outer diameter of the rear ventilator blocking ring 3 matches the outer side 11 of the stopper, and the interference is 0.02 to 0.06 mm; Install the rear ventilator blocking ring 3 into the core stripping groove of the rear ventilator body 1; Apply pressure slowly and evenly to press the rear ventilator blocking ring 3 into place; Electron beam welding the installed rear ventilator blocking ring 3; Remove the first guide surface 2 and the second guide surface 4 on the rear ventilator body 1 and the rear ventilator blocking ring 3.

[0029] In some embodiments, a method for assembling a rear ventilator blocking ring includes: A first guide surface 2 is provided on the stopper of the rear ventilator body 1; a second guide surface 4 is provided on the inner side 5 of the blocking ring 3 of the rear ventilator; the angle of the second guide surface is designed to be 16° +10′ ; Install the rear ventilator blocking ring 3 into the core stripping groove of the rear ventilator body 1; Use a special tool to contact the rear ventilator blocking ring 3 and apply pressure. Apply pressure slowly and evenly to press the rear ventilator blocking ring 3 into place. Electron beam welding the installed rear ventilator blocking ring 3; Remove the first guide surface 2 and the second guide surface 4 on the rear ventilator body 1 and the rear ventilator blocking ring 3.

[0030] In some embodiments, a method for assembling a rear ventilator blocking ring includes: A first guide surface 2 is arranged on the mouth of the rear ventilator body 1, and a second guide surface 4 is arranged on the inner side 5 of the rear ventilator plug ring 3; The rear ventilator plug ring 3 is installed into the core removal groove of the rear ventilator body 1; A special tool is used to contact the rear ventilator plug ring 3 and apply pressure, and the pressure is slowly and uniformly applied to press-fit the rear ventilator plug ring 3 into place; the special tool includes a pressing cap 7, and a support ring 9 is connected below the pressing cap 7 through a bolt 8, and the support ring 9 is in contact with the rear ventilator plug ring 3; The rear ventilator plug ring 3 that is installed into place is electron beam welded; The first guide surface 2 and the second guide surface 4 on the rear ventilator body 1 and the rear ventilator plug ring 3 are removed.

[0031] In some embodiments, a rear ventilator plug ring assembly method includes: A first guide surface 2 is arranged on the mouth of the rear ventilator body 1, and a second guide surface 4 is arranged on the inner side 5 of the rear ventilator plug ring 3; The rear ventilator plug ring 3 is installed into the core removal groove of the rear ventilator body 1; A special tool is used to contact the rear ventilator plug ring 3 and apply pressure, and the pressure is slowly and uniformly applied to press-fit the rear ventilator plug ring 3 into place; the special tool includes a pressing cap 7, and a support ring 9 is connected below the pressing cap 7 through a bolt 8, and the support ring 9 is in contact with the rear ventilator plug ring 3; the inner diameter of the support ring 9 is matched with the rear ventilator body 1, and the gap is 0.2-0.3 mm; The rear ventilator plug ring 3 that is installed into place is electron beam welded; The first guide surface 2 and the second guide surface 4 on the rear ventilator body 1 and the rear ventilator plug ring 3 are removed.

[0032] In some embodiments, a rear ventilator plug ring assembly method includes: A first guide surface 2 is arranged on the mouth of the rear ventilator body 1, and a second guide surface 4 is arranged on the inner side 5 of the rear ventilator plug ring 3; The rear ventilator plug ring 3 is installed into the core removal groove of the rear ventilator body 1; A special tool is used to contact the rear ventilator plug ring 3 and apply pressure, and the pressure is slowly and uniformly applied to press-fit the rear ventilator plug ring 3 into place; the special tool includes a pressing cap 7, and a support ring 9 is connected below the pressing cap 7 through a bolt 8, and the support ring 9 is in contact with the rear ventilator plug ring 3; the inner diameter of the support ring 9 is matched with the rear ventilator body 1, and the gap is 0.2-0.3 mm; The rear ventilator plug ring 3 that is installed into place is electron beam welded; The first guide surface 2 and the second guide surface 4 on the rear ventilator body 1 and the rear ventilator plug ring 3 are removed.

[0033]

Embodiment 1

[0034] This application is implemented through the following specific steps: 1) Design the core stripping groove structure of the rear ventilator body. This structure adds a guiding surface at the main body stop position based on the traditional core stripping straight ring groove structure.

[0035] 2) Synchronously design a blocking ring structure that cooperates with the core stripping groove structure of the rear ventilator body. By adding a process guide surface during the blocking ring processing, the blocking ring is guided and positioned through the surface during assembly.

[0036] 3) Design a special pressing tool to ensure that the blocking ring is pressed in horizontally. After pressing in, remove the process guide surface on the blocking ring and the main body through machining, and then weld to ensure welding quality and avoid welding cracks.

[0037] 4) Place the blocking ring on the rear ventilator platform and install it into the core stripping groove of the rear ventilator body, and install the special pressing tool in place.

[0038] 5) Use a press to slowly and evenly apply pressure on the special pressing tool to ensure that the plugging ring is pressed into place.

[0039] 6) Electron beam weld the installed blocking ring.

[0040] 7) Turn the blocking ring and the process guide surface on the main body on a lathe.

[0041] [Example 2] 1) Design the core stripping groove structure of the rear ventilator body (see Figure 1 ), this structure adds a guide surface at the main body stop position based on the traditional core-stripping straight ring groove structure. In order to ensure the best installation effect and reduce subsequent electron beam welding cracks, the surface angle is designed to be 16° +10′ .

[0042] 2) Synchronously design a blocking ring structure that matches the core stripping groove structure of the rear ventilator body (see Figure 2 ), by adding a process guide surface during the plugging ring processing, the surface guides and positions the plugging ring during assembly. The outer diameter and inner hole dimensions of the plugging cover are matched with the main body stoppers A and B respectively, and the interference fit is designed to be 0.02-0.06.

[0043] 3) Design a special press tool (see Figure 3 The inner hole size of the special tool is matched to that of the main body C to ensure a clearance of 0.2 to 0.3. The nominal outer diameter size is guaranteed to be the same as that of the main body A. This ensures that the plugging ring is pressed in horizontally. After pressing in, the process guide surfaces on the plugging ring and the main body are removed by machining before welding to ensure weld quality and avoid weld cracks.

[0044] 4) Place the blocking ring on the rear ventilator platform and install it into the core stripping groove of the rear ventilator body, and install the special pressing tool in place.

[0045] 5) Use a press to slowly and evenly apply pressure on the special pressing tool to ensure that the plugging ring is pressed into place.

[0046] 6) Electron beam weld the installed blocking ring.

[0047] 7) Turn the blocking ring and the process guide surface on the main body on a lathe.

[0048] The present application also discloses a rear ventilator blocking ring assembly structure, which is manufactured using any of the above-mentioned assembly methods.

[0049] In summary, the present application is directed to the core needs of the rear ventilation device blocking ring assembly reliability and welding quality improvement, and innovatively proposes a rear ventilation device blocking ring assembly structure and method. The core idea of the present application is to ensure that the rear ventilation device blocking ring and the rear ventilation device main body realize stress-free and high-precision zero-gap cooperation through the combination of precise guide structure design and customized tooling, and fundamentally eliminate the causes of welding cracks. The present application pre-processes a specific first guide surface 2 at the stop position of the rear ventilation device main body mounting hole; correspondingly, a second guide surface 4 matched with the first guide surface 2 is processed on the outer edge of the rear ventilation device blocking ring. In the assembly process, the second guide surface 4 on the rear ventilation device blocking ring first contacts the first guide surface 2 on the rear ventilation device main body stop, forming a progressive self-centering guide mechanism. This design cleverly uses the geometric characteristics of the inclined surface to automatically guide the rear ventilation device blocking ring to correct the angle under the action of the pressing force, so that its axis is accurately centered on the axis of the rear ventilation device main body mounting hole. In order to ensure that the guide mechanism can stably and reliably function and apply an absolute vertical pressing force, the present application also specially invents a customized special tool for pressing. The special tool not only provides stable clamping, but more importantly, can accurately guide and apply uniform pressure perpendicular to the mounting surface, completely avoiding the lateral force or impact deformation that may be caused by traditional pressing or hammering, thereby ensuring that the rear ventilation device blocking ring is strictly pressed horizontally (axially vertically) into place. After pressing, the rear ventilation device blocking ring and the rear ventilation device main body are in close contact through precise fitting. At this time, the blocking ring process guide surface and the main body stop guide surface, which are temporary process auxiliary structures, have completed their mission. The present scheme designs a key process: through precise turning, the first guide surface 2 and the second guide surface 4 reserved on the rear ventilation device blocking ring and the rear ventilation device main body are simultaneously removed. The temporary structure designed only for assembly guide is completely eliminated; the present application finally effectively prevents the occurrence of welding cracks, and fundamentally guarantees the quality of the welding joint and the long-term use reliability of the product.

[0050] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for assembling a rear ventilator blocking ring, characterized in that: include: A first guide surface (2) is provided on the stopper of the rear ventilator body (1); a second guide surface (4) is provided on the inner side (5) of the blocking ring (3) of the rear ventilator; Install the rear ventilator blocking ring (3) into the core stripping groove of the rear ventilator body (1); Apply pressure slowly and evenly to press the rear ventilator plug ring (3) into place; Electron beam welding the installed rear ventilator plugging ring (3); The first guide surface (2) and the second guide surface (4) on the rear ventilator body (1) and the rear ventilator blocking ring (3) are removed.

2. A method for assembling a rear ventilator blocking ring according to claim 1, characterized in that: The angle of the first guiding surface (2) is designed to be 16° +10′ .

3. The method for assembling a rear ventilator blocking ring according to claim 1, characterized in that: The inner diameter of the rear ventilator blocking ring (3) is matched with the inner diameter of the stopper (10), and the interference is 0.02 to 0.06 mm.

4. The method for assembling a rear ventilator blocking ring according to claim 1, characterized in that: The outer diameter of the rear ventilator blocking ring (3) matches the outer diameter of the stopper (11), and the interference is 0.02 to 0.06 mm.

5. The method for assembling a rear ventilator blocking ring according to claim 1, characterized in that: The second guide surface (4) has a surface angle of 16°. +10′ .

6. A method for assembling a rear ventilator blocking ring according to claim 1, characterized in that: Use a special tool to contact the rear ventilator blocking ring (3) and apply pressure.

7. The assembly method of the rear ventilator blocking ring assembly structure according to claim 6, characterized in that: The special tooling comprises a pressure cover (7), a support ring (9) is connected to the bottom of the pressure cover (7) via bolts (8), and the support ring (9) is in contact with the rear ventilator blocking ring (3).

8. The tool for assembling the rear ventilator blocking ring assembly structure according to claim 7, characterized in that: The inner diameter of the support ring (9) is adapted to the rear ventilator body (1), and the gap is 0.2-0.3 mm.

9. The method for assembling a rear ventilator blocking ring assembly structure according to claim 6, characterized in that: Use a press to slowly and evenly apply pressure on the special press-fitting tool to press the rear ventilator plugging ring (3) into place.

10. A rear ventilator blocking ring assembly structure, characterized in that: The invention is prepared by the assembly method according to any one of claims 1 to 9.

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