A flame transmitting groove for reducing welding and heat treatment deformation and a manufacturing process thereof

Abstract

The application provides an outer flame channel capable of reducing welding and heat treatment deformation and a manufacturing process thereof. The outer flame channel comprises an outer wall of the flame channel and a flame channel partition plate arranged on the inner surface of the outer wall of the flame channel. The flame channel partition plate is provided with a slot for mounting an inner flame channel. A micro-connection process structure is arranged at the slot. The micro-connection process structure is constructed by the flame channel partition plate itself, which enhances the rigidity and deformation resistance of the structure of the flame channel partition plate. During welding, the micro-connection process structure partially replaces the welding fixture to control the welding deformation. During heat treatment, the micro-connection process structure also controls the additional deformation caused by the release of heat treatment stress. The micro-connection process structure is removed, and the part coated with a coating layer meets the assembly requirements of the next level of components, thereby saving the manufacturing cost of the welding fixture and the heat treatment fixture, improving the manufacturing quality of the outer flame channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, heat treatment and deformation control, in particular to an outer flame channel and a manufacturing process thereof for reducing welding and heat treatment deformation. BACKGROUND

[0002] The outer flame channel of the aero-engine is a sheet welding structure formed by argon arc welding of the outer wall 1 and the partition plate 2 of the flame channel. Figure 1 2 In the production and development, due to the narrow welding structure space and welding construction limitation, an ideal welding and heat treatment deformation control fixture cannot be designed to limit the welding and heat treatment deformation. The welding deformation and heat treatment stress release deformation cause the outer wall of the flame channel to shrink at the position of the partition plate of the flame channel, resulting in a smaller opening C of the partition plate, and the actual measured opening C is shrunk by more than 5mm after heat treatment.

[0003] In the prior art, various correction schemes are used to correct the opening size C of the partition plate of the flame channel and the profile of the outer wall of the flame channel, but the ideal effect is not achieved. The deformation of the outer wall of the flame channel directly affects the adhesion effect of the stealth coating, and the coating is easy to fall off due to local deformation. The outer flame channel seriously interferes with the assembly of the engine stabilizer unit and the matching parts, and the interference structure part is ground away by damaging the main body of the partition plate of the flame channel, so that it can be assembled with the matching parts. In fact, it is used in an out-of-tolerance design state.

[0004] The main process difficulty of the outer flame channel assembly is that the welding structure space is narrow, and due to the welding construction limitation, a suitable welding fixture cannot be found to control the welding deformation. After the welding deformation, it cannot be corrected and recovered, which affects the assembly of the next unit. The deformation of the outer wall of the flame channel caused by welding affects the adhesion of the stealth coating, and the coating is easy to fall off. Therefore, how to control and solve the welding and heat treatment deformation of the flame channel is a technical problem that needs to be solved at present. SUMMARY

[0005] The technical task of the present application is to solve the technical problems of the prior art, that is, to provide an outer flame channel and a manufacturing process thereof for reducing welding and heat treatment deformation, so as to solve the technical problems of the narrow welding structure space of the outer flame channel and the inability to use a fixture to control the welding and heat treatment deformation after welding.

[0006] The technical solution adopted by the present application to solve the technical problems is as follows: an outer flame channel for reducing welding and heat treatment deformation, the outer flame channel comprising an outer wall of the flame channel and a partition plate of the flame channel arranged on the inner surface of the outer wall of the flame channel, the partition plate of the flame channel being provided with a slot for mounting an inner flame channel, and a micro connection process structure being arranged at the slot.

[0007] ​Further, the micro-connection process structure comprises a connecting plate connected with the slot through a plurality of connecting edges.

[0008] Further, the connecting edges are four, respectively arranged on the upper and lower parts of the connecting plate.

[0009] Further, the length and width of the connecting edges are both 2-4 mm, and the thickness is the same as that of the partition plate.

[0010] Further, the micro-connection structure is obtained by laser cutting processing on the flame transmission slot partition plate, and after welding and heat treatment of the flame transmission slot outer wall and the flame transmission slot partition plate, the micro-connection process structure is removed, and then the inner flame transmission slot is installed.

[0011] Further, the flame transmission slot partition plate is arranged perpendicularly to the inner surface of the flame transmission slot outer wall, and the flame transmission slot outer wall and the flame transmission slot partition plate both have a U-shaped structure, and the U-shaped aperture of the U-shaped structure gradually increases from the radial opening end.

[0012] The manufacturing process of the outer flame transmission slot comprises the following steps:

[0013] (1) laser processing the flame transmission slot partition plate with a micro-connection process structure;

[0014] (2) welding the flame transmission slot outer wall and the flame transmission slot partition plate;

[0015] (3) heat treatment after welding;

[0016] (4) shearing and removing the micro-connection process structure of the flame transmission slot partition plate;

[0017] (5) applying a stealth coating.

[0018] Further, the step (4) shearing and removing the micro-connection process structure of the flame transmission slot partition plate, i.e. shearing the connecting edges connected with the slot.

[0019] Further, before applying the stealth coating, it is necessary to check whether the welding quality, surface quality and slot size of the outer flame transmission slot meet the design requirements.

[0020] Further, the welding of the step (2) selects corresponding welding process parameters according to the design drawing, material brand and thickness; and the heat treatment of the step (3) selects corresponding heat treatment system according to the design drawing and material brand.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The present application adopts the micro-connection process structure of the flame transmission groove partition plate itself to enhance the rigidity and deformation resistance of the flame transmission groove partition plate structure, and the micro-connection process structure part replaces the welding fixture to control the welding deformation during welding; similarly, the process structure part also replaces the heat treatment fixture to control the heat treatment stress release and additional deformation during heat treatment. The purpose of controlling the welding deformation and heat treatment deformation of the outer flame transmission groove is achieved, the part coated with a coating layer meets the assembly requirements of the next level component, the manufacturing cost of the welding fixture and the heat treatment fixture is saved, and the manufacturing quality of the outer flame transmission groove is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the structure of the outer flame transmission groove in the prior art;

[0024] Figure 2 is the A-A rotary section view of the outer flame transmission groove structure in the prior art;

[0025] Figure 3 is the flame transmission groove partition plate structure with a micro-connection process structure;

[0026] Figure 4 is the main view of the flame transmission groove structure with a micro-connection process structure;

[0027] Figure 5 is the A-A rotary section view of the flame transmission groove structure with a micro-connection process structure;

[0028] Figure 6 is the main view of the outer flame transmission groove structure after heat treatment, with the micro-connection process structure removed from the flame transmission groove partition plate;

[0029] Figure 7 is the A-A rotary section view of the outer flame transmission groove structure after heat treatment, with the micro-connection process structure removed from the flame transmission groove partition plate;

[0030] Figure 8 is the schematic diagram of the outer flame transmission groove structure coated with a stealth coating;

[0031] BRIEF DESCRIPTION OF DRAWINGS: 1-flame transmission groove outer wall; 2-flame transmission groove partition plate; 3-slot; 4-connection plate; 5-connection; 6-stealth coating. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. In the part manufacturing process, the process structure refers to the auxiliary part in the part processing process, which is removed in the final state of the part processing. Therefore, the process structure in the present application is an auxiliary processing structure designed in the part processing process. The manufacturing process ensures the technical index of the part processing process, that is, the method of replacing the tooling by using the material structure of the part itself.

[0033] Example 1

[0034] As shown in Figure 3 、 4 , 5, an outer flame channel for reducing welding and heat treatment deformation, the outer flame channel comprising an outer wall of the flame channel 1 and a flame channel partition plate 2 arranged on the inner surface of the outer wall of the flame channel, the flame channel partition plate being provided with a U-shaped notch 3 for mounting an inner flame channel, and a micro-connection process structure being arranged at the U-shaped notch; the micro-connection process structure comprises a connecting plate 4, the connecting plate being connected with the U-shaped notch through four connecting edges 5 of the periphery; the four connecting edges are designed to have a certain strength to prevent welding shrinkage deformation support, and are also convenient for shearing off.

[0035] Among them, the flame channel partition plate is arranged perpendicular to the inner surface of the outer wall of the flame channel, the outer wall of the flame channel and the flame channel partition plate are in U-shaped structure, and the radial opening end of the U-shaped structure gradually increases.

[0036] Among them, the four connecting edges are respectively arranged on the upper and lower parts of the connecting plate on both sides.

[0037] Among them, the length a and the width b of the four connecting edges are both 2mm, and the thickness is the same as that of the partition plate. The size design mainly ensures sufficient strength to limit welding deformation and heat treatment deformation, and also takes into account the convenience of removing and shearing off after heat treatment.

[0038] Among them, the micro-connection structure is obtained by laser cutting processing of the flame channel partition plate. After welding and heat treatment of the outer wall of the flame channel and the flame channel partition plate, the micro-connection process structure is removed, and the inner flame channel can be installed.

[0039] Example 2

[0040] The manufacturing process of the outer flame channel for reducing welding and heat treatment deformation according to example 1, comprising:

[0041] Step one, analyze the design drawing, according to Figure 1 、 2, master the design structure information of the outer flame channel, the material of the outer wall 1 of the flame channel is GH3128 and the thickness is 1.0mm, the material of the partition plate of the flame channel is GH3128 and the thickness is 1.0mm;

[0042] Step two, according to Figure 3 , build the micro-connection process structure of the partition plate of the flame channel;

[0043] Step three, make the partition plate 2 of the flame channel with the micro-connection process structure, according to Figure 3 , use laser cutting to process the partition plate of the flame channel with the micro-connection process structure;

[0044] Step four, take the outer wall 1 of the flame channel, the partition plate 2 of the flame channel with the micro-connection process structure and the welding wire, polish the surface and end face of the parts to be welded to metal gloss with abrasive belt, and clean the welding surface with anhydrous ethanol or acetone, the welding wire material is selected according to the part material GH3128, and the welding wire diameter is selected according to the part thickness

[0045] Step five, assemble and position weld the partition plate 2 of the flame channel, according to Figure 4 , 5 Design structure of the outer flame channel, assemble the outer wall 1 of the flame channel and the partition plate 2 of the flame channel with the micro-connection process structure, and use argon arc welding to position weld 3-4 points, the welding parameters are selected according to the thickness of the welded parts, the welding wire: brand HGH3128, diameter Tungsten electrode: brand WCe, diameter Welding gun nozzle diameter Welding gun argon flow rate, 8-10L / min; welding current: 20-30A, direct current positive connection;

[0046] Step six, argon arc welding of the partition plate 2 of the flame channel, according to Figure 4 , 5 , manual argon arc welding of the partition plate 2 of the flame channel, welding parameters, welding wire: brand HGH3128, diameter Tungsten electrode: brand WCe, diameter Welding gun nozzle diameter Welding gun argon flow rate, 8-10L / min; welding current: 30-50A, direct current positive connection;

[0047] Step seven, check the welding quality, visually check the weld for cracks;

[0048] Step eight, grinding correction, remove welding spatter and large welding bumps with an air drill grinding wheel rod, and correct the welding deformation of the parts;

[0049] Step nine, vacuum heat treatment to eliminate welding stress, temperature 1160±10℃;

[0050] Step ten, correct the deformation, correct the heat treatment deformation;

[0051] Step eleven, check the welding quality, visual inspection of the weld is not allowed to have cracks;

[0052] Step twelve, according to Figure 6 , 7 , the connecting part is cut by iron scissors to remove the micro connection process structure of the flame channel partition plate 2;

[0053] Step fourteen, deburring, the burr left by the shear is removed by the air drill grinding wheel rod;

[0054] Step fifteen, according to Figure 6 , 7 inspection, check the welding quality, check the size L of the welding position of the flame channel partition plate 2, check whether the size C of the notch of the flame channel partition plate 2 and the size C1 of the opening of the outer wall of the flame channel are qualified.

[0055] Step sixteen, qualified parts are coated with a stealth coating 6 on the outer surface of the outer wall 1 of the flame channel according to Figure 8 requirements, the inner flame channel is installed, the outer flame channel and the inner flame channel are assembled without interference, and the design requirements are met.

[0056] The above technical scheme sets forth the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification and modification of the above technical scheme according to the technical essence of the present application, without departing from the content of the technical scheme of the present application, belongs to the protection scope of the technical scheme of the present application.

Claims

1. An external flame trough for reducing welding and heat treatment deformation, characterized by: The outer flame trough includes an outer wall of the flame trough, and a flame trough partition arranged on the inner surface of the outer wall of the flame trough. The flame trough partition is provided with a slot for installing the inner flame trough, and a micro-connection process structure is provided at the slot. The micro-connection process structure includes a connecting plate, and the connecting plate is connected to the slot through multiple connections on the edge. The connection is designed to have a certain strength to prevent welding shrinkage and deformation, and to provide a support function, and to facilitate shearing off the process structure.

2. The outer flame trough for reducing welding and heat treatment deformation according to claim 1, characterized in that: There are four connecting points, which are respectively arranged at the upper and lower parts of both sides of the connecting plate.

3. The outer flame trough for reducing welding and heat treatment deformation according to claim 1, characterized in that: The length and width of the connection are both 2-4 mm, and the thickness is the same as that of the partition.

4. The outer flame trough for reducing welding and heat treatment deformation according to claim 1, characterized in that: The micro-connection structure is obtained by laser cutting the flame transmission groove partition. After welding and heat treatment of the flame transmission groove outer wall and the flame transmission groove partition, the micro-connection process structure is removed and the inner flame transmission groove can be installed.

5. The outer flame trough for reducing welding and heat treatment deformation according to claim 1, characterized in that: The flame transmission groove partition is arranged perpendicular to the inner surface of the outer wall of the flame transmission groove. The outer wall of the flame transmission groove and the flame transmission groove partition are both U-shaped structures, and the radial opening end of the U-shaped mouth of the U-shaped structure gradually increases.

6. A process for manufacturing an external flame trough for reducing welding and heat treatment deformation according to any one of claims 1 to 5, characterized in that: The specific steps are: (1) Laser processing of flame transfer groove partitions with micro-connection process structures; (2) Welding the outer wall of the flame transfer groove and the flame transfer groove partition; (3) Perform post-weld heat treatment; (4) Shearing and removing the flame transfer groove partition micro-connection process structure; (5) Apply stealth coating.

7. The manufacturing process of the outer flame trough for reducing welding and heat treatment deformation according to claim 6, characterized in that: Step (4) is to shear and remove the micro-connection process structure of the flame transmission groove partition, that is, to shear the connection between the connection and the groove.

8. The manufacturing process of the outer flame trough for reducing welding and heat treatment deformation according to claim 6, characterized in that: Before applying the stealth coating, it is necessary to check whether the welding quality, surface quality and slot size of the external flame slot meet the design requirements.

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